@karmanyaahm – Hack Club Scrapbook

Sun, Nov 24

Random 4 hour hack on one of my 20 receipt printers that I got for $5 Voice to receipt printer! Using a bunch of jank power supplies (I don't have the official power supply) and usb->serial adapters (I don't have the official USB version) and Python speech to text

https://scrapbook-into-the-redwoods.s3.us-east-1.amazonaws.com/45a8406d-ef33-4a71-976f-38ef3583dcb5-pxl_20241122_075516881_2.jpg

Sun, Nov 10

devpost.com/software/takeover-texas IRL Jet Lag Australia

https://scrapbook-into-the-redwoods.s3.us-east-1.amazonaws.com/5d0ef97f-3723-4a84-89c2-1f44ee8b5037-image.png

https://imgutil.s3.us-east-2.amazonaws.com/0fb80ebff9b0ddbce3dfa75085f5bed45c2a338c9a55771d5da43e5f71f1f547/dd1f2e67-ef56-4516-ae3d-2a001d4cb55d.png

Fri, Aug 2

pcb fidget spinner v1 ordered

https://scrapbook-into-the-redwoods.s3.amazonaws.com/592dfec1-1aa5-44a5-876d-2e2571ac9fa4-image.png

Tue, Jul 30

pcb motor! (from jul 27th)

https://scrapbook-into-the-redwoods.s3.amazonaws.com/42792161-31b4-44a6-9264-09eabe858fed-screen-20240727-092144_exported_22517_2.jpg

Mon, Jul 22

First time ever I was topologically REQUIRED to use a net tie in pcb design. My PCB motor's coils are just technically one long wire, so it's all assigned one net. But, I need to explicitly connect the right power pins to the right /parts/ of the motor wire. So, I placed net ties on those specific parts of the motor footprint.

https://scrapbook-into-the-redwoods.s3.amazonaws.com/096e826b-ec25-4118-9665-bcc5e85e4839-image.png

Thu, Jul 18

I ordered it! (using the remainder of my onboard grant finally, remind me to push files to the repo)

https://scrapbook-into-the-redwoods.s3.amazonaws.com/ed20f769-44b7-4750-b7d9-41ef7f83926b-image.png

Thu, Jul 18

I played around with kimotor

https://scrapbook-into-the-redwoods.s3.amazonaws.com/abc6ccdd-198f-4f9b-8d1c-85cc340ac0b3-image.png

Sat, Jun 29

I am so smart

https://scrapbook-into-the-redwoods.s3.amazonaws.com/90a8f0d2-e46c-433a-b360-8eec327b0dfd-pxl_20240628_235210501_2.jpg

Tue, Jun 25

Crimped a custom ribbon cable for chessbot moving axis

https://scrapbook-into-the-redwoods.s3.amazonaws.com/579dd276-cd39-4be3-bd9b-fa29b81dad3b-pxl_20240625_063758497.mp.jpg

Tue, Jun 25

After hours of trying I have finally crimped a DuPont connector successfully

https://scrapbook-into-the-redwoods.s3.amazonaws.com/2bfe68ea-5e18-4eac-905e-fbf0d3c7a2bb-pxl_20240625_053804005.portrait.jpg

Mon, Jun 24

nevermind I realized I just reinvented a watchdog timer that's sot-23-5 and only 25 cents

https://scrapbook-into-the-redwoods.s3.amazonaws.com/24a42b3c-77fa-47eb-97b9-025ad5bc1a2b-image.png

Mon, Jun 24

Clever circuit time! I'm running a chain of I2C magnetometers and Neopixels. To set the address on the I2c magnetometers, I either need to use an I2C switch and connect to it one by one, or power them on one by one. For either case I would have to route more wires, which is hard given that my board is only 10mm wide (:eyes_shaking:). But! I'm already running a chain of individually addressable LEDs for my neopixels. So what if, instead of running another data signal, I just use whether or not my neopixel data is active to enable this subcircuit. Both 0s and 1s on neopixels have some high time, so whenever I'm sending data to the pixels, the diode charges the capacitor! But the neopixel latch signal is fully low for 50uS, so I need to make sure that my circuit stays on for the several hundred microseconds when my last pixel is first being reset, then waiting for data. So, the resistor slowly discharges the capacitor, over a period of 100mS (to be very safe) for 63% discharge. Therefore, if the data line is low for more than 100mS, all my sensors will turn off. Then, by sending data to only the first few neopixels, I can turn the sensors on one by one!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/27835e6b-07ac-4fb8-89e1-56012e894217-image.png

https://scrapbook-into-the-redwoods.s3.amazonaws.com/bf90ebc5-5995-4870-b6df-4227c90a15ec-image.png

Thu, Jun 20

Chessbot's stepper component is now talking to the pathing component with the new pcb!! The only connection (other than the motors ofc) is the USB c power cable. So much more convenient to program than many other robots (over WiFi)

Thu, Jun 20

Chessbot controlboard PCBs arrived from JLC today and I was able to assemble one enough to have one axis moving!!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/a2da2024-1915-4ab4-ab49-314136eaf3b6-rn_image_picker_lib_temp_005c14c8-9b93-4344-9fa1-8d4fd82c0b55.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/310d00dd-93a0-4202-9d89-6f761c992d3c-pxl_20240620_053923226.jpg

Sun, Jun 16

Finally edited my HackTX 2023 project video!! www.youtube.com/watch?v=O36_HwhB4es

https://imgutil.s3.us-east-2.amazonaws.com/9558a5191fa3d5cfa8832e02c305124cca474500ce5f1f09cf15121d46a74c95/cdd7f1bf-8390-4738-af4b-8109e363e1ae.png

Fri, Jun 14

Also thanks to Rebecca and Hikari from JLCPCB I was able to get Chessbot's controlboard sponsored, and it's being manufactured!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/f350249e-02e8-47ba-b17d-ecfd01c57620-screenshot_20240614-140005.png

Fri, Jun 14

Ran a game run with the now fully operational chessboard! And recorded magnetometer mqtt data and a video to send to my team member who's working on analysis of the raw data to get chess moves

https://scrapbook-into-the-redwoods.s3.amazonaws.com/c8f6405c-d97f-4a8c-9f36-fabc87800f07-pxl_20240614_185743770.jpg

Mon, Jun 10

GUESS WHAT

https://scrapbook-into-the-redwoods.s3.amazonaws.com/91cbd4e0-508e-4789-838e-2ed2ea1db49f-1000012508.jpg

Fri, Jun 7

Jerry!!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/a2b6b8de-31a6-46e4-a051-0b8897c39fe8-pxl_20240607_200425180.jpg

Thu, Jun 6

Also hypertuned the shove and travel on my vexai robot to be smooth. And aforementioned laser distance sensors are being used for a position sync at the end allowing for perfect positioning between loops. This bot has no smarts so let's hope the opponents don't decide to play defense.

Thu, Jun 6

After a lot of research I bought 1 lb of solder yesterday, hoping it lasts for >10 years

https://scrapbook-into-the-redwoods.s3.amazonaws.com/cba02f38-94ff-463a-977d-57648366a672-screenshot_20240606-083025.png

Tue, Jun 4

Just realized I never shared the chessbot controlboard renders here. I also reached out to my JLCPCB contact to potentially get this board sponsored

https://scrapbook-into-the-redwoods.s3.amazonaws.com/2a20e107-c54e-43b6-9efb-56e2a79059ed-image.png

https://scrapbook-into-the-redwoods.s3.amazonaws.com/732e0a1c-c256-4571-b181-1ed62680b71c-image.png

Sat, Jun 1

Using distance sensors as 2-point LIDAR for localizing my vexai robot. Our other robot has a real spinny LIDAR, but this one's simple

https://scrapbook-into-the-redwoods.s3.amazonaws.com/3d9e0888-d31f-48cd-946a-23867be90bfe-img_20240601_185319.jpg

Sat, Jun 1

Last night got Chessbot controlboard done mostly!!! Just need to fix errors now!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/85b0ea7c-cfb0-448e-8d7e-06595c3e927b-image-31.png

Tue, May 28

and also finished the chessbot controlboard schematic! need review from the team, but pretty close github.com/ut-ras/chessbot/tree/main/controlboard

https://scrapbook-into-the-redwoods.s3.amazonaws.com/01ac85e6-d908-40a5-ae43-38bab1c4ca01-image.png

https://imgutil.s3.us-east-2.amazonaws.com/973bcbc200d2cb1cd11f04b0fcdc826b9d94f2a1e1cf395b4421946571a40ece/ce3fb382-32ad-430b-8b23-81c4784645e0.png

Tue, May 28

worked on visualizing the mqtt topics for chessbot's inter-process-communication

https://scrapbook-into-the-redwoods.s3.amazonaws.com/6ece2887-8209-41db-9c4c-733a09d16b7f-image.png

Thu, May 23

All but 1 square is working and the chessboard is huge!!!! (Not very responsive rn but performance is TODO)

https://scrapbook-into-the-redwoods.s3.amazonaws.com/e4dca948-3170-4993-8b2a-049fd106ef55-image0.gif

https://scrapbook-into-the-redwoods.s3.amazonaws.com/182f4d2a-ed35-45d2-b0bf-a575b7c2ce3a-pxl_20240523_082800515.jpg

Thu, May 23

More chessboard debugging with my new Pi zero 2 Ws!!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/983e8e5e-f909-484f-b5d7-22bfde293b51-img_20240522_221620_970.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/8c8915c8-0c64-4b19-8dd2-c61f24def5b7-1000012138.jpg

Wed, May 15

Hi can I break scrapbook again: @karmanyaahm@social.linux.pizza

https://scrapbook-into-the-redwoods.s3.amazonaws.com/ee671cfe-4e63-4443-aaa9-5083c48d28a3-highleveldiagram-1.png

Wed, May 15

I wrote an architecture for Chessbot's software, and my friend (@4jakers18@github.com) made a pretty diagram for it. The topics use mqtt to communicate between seperate programs

https://scrapbook-into-the-redwoods.s3.amazonaws.com/3909fd84-e86d-481b-92de-bc9b05414c57-highleveldiagram-1.png

Sun, May 12

Made more chessboard progress today

Tue, Apr 30

More robotics!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/33d09eba-ac03-4010-b5bd-1da1d14d083c-pxl_20240429_214606472_1_.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/d6ef2090-215b-4d3d-886d-61739f2dce27-pxl_20240429_213802179_1__2.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/53d591f6-582f-45e7-8e7d-3b097a3ae836-screenshot_20240429-210644.png

https://scrapbook-into-the-redwoods.s3.amazonaws.com/c5e9fea1-4130-44be-9156-871a5acc6316-screenshot_20240429-192528.png

https://scrapbook-into-the-redwoods.s3.amazonaws.com/dd80f220-7680-40f7-a7ff-f8dd7f8aa0dd-pxl_20240430_005724347.portrait.jpg

Mon, Apr 29

Vex U robotics worlds!!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/f9fb6ca5-ae99-4978-b147-c00b8a2211aa-1000011483.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/066748c0-3e6c-4334-933c-368fd28227ee-1000011465.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/1d327254-b9cc-4938-9636-6018bc6c943f-1000011476.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/6fd1d2e4-2802-4bcb-8002-ef12d5a24774-1000011456.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/b8c186bd-ae6a-41da-93b4-7349c5938fcc-1000011464.jpg

Sat, Apr 27

So much robotics this week

Tue, Apr 23

Chessbot can now follow a lichess game!

Sat, Apr 13

Chessbot motion system fully integrated and dragging pieces on Tuesday

Sat, Apr 6

Made a little matplotlib visualization for Chessbot's chessboard magnetometer areay

Sat, Apr 6

Neopixel header works!!!

Sat, Apr 6

MAJOR CHESSBOT UPDATE!!! We have movement!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/10da1f4d-a94a-497d-a030-3aef3e99e691-pxl_20240406_011542512.jpg

Thu, Apr 4

Chessbot control board PCB Concept (trying to make it pi zero sized) This'll be a really tall stack tho

https://scrapbook-into-the-redwoods.s3.amazonaws.com/0464b94a-6e2e-44a3-9c25-014f364be52d-image.png

Wed, Apr 3

Made a little bit of progress on chessbot's proto-control-board as a raspberry pi shield, you can power the pi directly from the screw terminal now, everything else is still disconnected though. If our whole control package ends up this size (hopefully even smaller) I will be fairly happy

https://scrapbook-into-the-redwoods.s3.amazonaws.com/9bed0c4c-1a4c-4ec3-876d-d3bbd8307ef8-pxl_20240403_220627732.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/e8f7144b-d016-43d5-baed-3eeb089902df-pxl_20240403_220647691.jpg

Fri, Mar 29

Learning NextJS API Routes for #onboard gerber.zip

https://scrapbook-into-the-redwoods.s3.amazonaws.com/9e04c73d-bfb9-41a9-b338-451c0ebbc7f0-image.png

Sun, Mar 24

Received my hcb card and tbh this reeeealy does not seem safe

https://scrapbook-into-the-redwoods.s3.amazonaws.com/ae6881e6-e725-4329-a9ad-763c7390a078-screenshot_20240324-180340.png

Sat, Mar 23

www.youtube.com/watch?v=ks5PpF_mrhg 👀

https://imgutil.s3.us-east-2.amazonaws.com/3297d2b6ecbd0ac82d495bc35ecaf128b617a9eeac2e4bc700a365bd189cf669/d363c40a-ddcb-4a36-8f2e-078beca3566b.png

Fri, Mar 22

Formulahacks today!! So excited 😄

https://scrapbook-into-the-redwoods.s3.amazonaws.com/8705ef1c-97b9-4a18-a12e-f6ddf8383dc8-img_20240322_112646.jpg

Fri, Mar 22

Rickrolled the library

https://scrapbook-into-the-redwoods.s3.amazonaws.com/7e940ce6-ebf0-4048-8207-c5f2001166c8-pxl_20240322_032404097.mp.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/f4fa4b86-f2b8-439f-9e4b-5f23eccc4d03-pxl_20240322_032328852.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/10286b7b-698c-41b6-8223-2094d8574660-pxl_20240322_032808199.jpg

Fri, Mar 22

Assembled one chessboard segment (one row) yesterday

https://scrapbook-into-the-redwoods.s3.amazonaws.com/9f5d33c0-3b96-4d5e-8716-3fe1d4ab1d2b-1000010219.png

Fri, Mar 22

Electrical engineering 🤓. Got one of the magnetometers for Chessbot reading data on Monday! Also, APPARENTLY WE (the ECE dept) HAVE A REFLOW OVEN LIKE A PROFESSIONAL KIND OMGOMGOMGOMGOMG THIS WAS MY REACTION I LITERALLY JUMPED WHEN I SAW IT. Next side quest is to get trained to use it

https://scrapbook-into-the-redwoods.s3.amazonaws.com/b9e80d4c-96dd-450b-a0c9-36dbc1614472-pxl_20240319_025309778.ts_exported_1803.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/bdfa60dd-d8d3-4440-b7be-0b848706a9fc-1000010151.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/3aed558f-f48e-4ce1-b828-ee32c1177dec-1000010163.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/2b2585d1-071f-4196-a009-d608d579dcee-1000010162.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/410dae89-17db-461b-be56-fa2c0c321aed-1000010154.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/c078749d-61b9-4c76-bbde-64889262fa8f-1000010161.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/36fae484-6f93-4a7e-b48a-c077443b11d9-1000010248.jpg

Thu, Mar 21

I got a 1200 watt buck boost converter for formulahacks and #trident

https://scrapbook-into-the-redwoods.s3.amazonaws.com/6c88e5f5-22d6-4081-be5a-5c8711387621-pxl_20240321_224034516.jpg

Sat, Mar 16

routing 😭

https://scrapbook-into-the-redwoods.s3.amazonaws.com/c60b9777-b3b2-4a95-8c24-4646f8a00cca-image.png

Wed, Mar 13

it should be illegal to remap ctrl+f to something else (in this case flip layers) when find is actually a meaningful function here

https://scrapbook-into-the-redwoods.s3.amazonaws.com/dcd10d88-b5b0-4765-a593-bcee7ca4cc4a-image.png

Sat, Mar 9

I learned how to send grants on HCB thanks to @sarthak

https://scrapbook-into-the-redwoods.s3.amazonaws.com/c1224c26-761d-4585-992c-418ba1ec1648-image.png

Fri, Mar 8

LCSC order for Chessbot came in!!!!!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/6c0a6cf1-b505-40d5-abfc-1a3c0c2fd6de-pxl_20240308_180934660.jpg

Wed, Mar 6

nice

https://scrapbook-into-the-redwoods.s3.amazonaws.com/13a29461-5fdd-4a7c-88a1-742fbf16e2a3-image.png

Wed, Mar 6

I just launched the first tool on my really cool domain gerber.zip! You can upload your gerbers and view them on the web. It's a fork of tracespace.io, but with a couple of extra features and more to come! You can also share links to boards that are uploaded anywhere on the internet like this: gerber.zip/2d/?mode=layers&boardUrl=https://raw.githubusercontent.com/hackclub/OnBoard/6b11e9eae59783bd3c8d29f791d01d4e5c90d03d/projects/karmanyaahs-musical-keyboard/gerber.zip

https://imgutil.s3.us-east-2.amazonaws.com/186489f69aabe484a5d2891ea035372dbc6f3fe4df42f4e24e328f542ed0f4ca/0f8fee36-2910-4ae4-8bdd-97132bcc7848.png

Wed, Mar 6

and also made it so tracespace fills gaps in easyeda exports by default without having to change any settings!!! (cc @parkalex380 cameo)

https://scrapbook-into-the-redwoods.s3.amazonaws.com/9128e89e-104f-4838-a6b4-a1c65a49e863-image.png

Wed, Mar 6

Added a URL parameter to tracespace for default view (mode=layers)

https://scrapbook-into-the-redwoods.s3.amazonaws.com/05b08a04-6128-4b3a-9c8b-ca6f6e0a5313-image.png

Wed, Mar 6

ripgrep is my fucking hero when working in a new large codebase

https://scrapbook-into-the-redwoods.s3.amazonaws.com/a62c2fec-f058-4013-a9d0-8e8b84c95057-image.png

Tue, Mar 5

I met a robot tour guide today at AHG (realizing I should have taken better pictures)

https://scrapbook-into-the-redwoods.s3.amazonaws.com/52342d0e-4775-4669-be49-0c791eef4711-pxl_20240305_230516657.jpg

Tue, Mar 5

Accidentally blew up TMC5160 stepper drivers by connecting them upside down 😭

https://scrapbook-into-the-redwoods.s3.amazonaws.com/0f1f4560-ca85-4bff-8267-5fd6881792cb-pxl_20240305_004653724.jpg

Tue, Mar 5

470M ohm resistors for a high voltage resistor divider

https://scrapbook-into-the-redwoods.s3.amazonaws.com/0ad1a20e-aa5e-4274-a0e7-4da238744aec-1000009670.jpg

Sun, Mar 3

Also did robotics auton testing from like 9pm yesterday to 2am today

https://scrapbook-into-the-redwoods.s3.amazonaws.com/540b0509-c8c1-4422-83a1-9b5ccc6fb06c-screenshot_20240302-001733.png

Sun, Mar 3

Scorekeeping a middle school vex robotics competition

https://scrapbook-into-the-redwoods.s3.amazonaws.com/e5f6a0d4-3620-4b0d-90e8-1fa581c7e11c-pxl_20240302_195641842.jpg

Fri, Mar 1

Ugh red tape

https://scrapbook-into-the-redwoods.s3.amazonaws.com/7c998f49-20eb-485d-a062-b5cc49df27d6-screenshot_20240301-025036.png

Tue, Feb 27

also I compiled a nixos sd card image for raspberry pi yesterday using instructions from artemis.sh/2023/06/06/cross-compile-nixos-for-great-good.html

https://scrapbook-into-the-redwoods.s3.amazonaws.com/a3a66d2d-e12f-4afb-aab3-81e1b1c56058-image.png

Tue, Feb 27

oops i accidentally puushed directly to hackclub/onboard, testing our new review bot

https://scrapbook-into-the-redwoods.s3.amazonaws.com/05522a92-6b7c-4037-a71a-68fb65c9cce2-image.png

Sun, Feb 25

Got like 30 mins of sleep while doing hotel room robotics but very intense comp day yesterday

https://scrapbook-into-the-redwoods.s3.amazonaws.com/0cb9cf23-c7b1-42e0-a89b-8af28a83c089-1000009541.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/0a9752ef-c4bf-405d-95f2-d3c77264956f-1000009547.jpg

Sat, Feb 24

Hotel room robotics

https://scrapbook-into-the-redwoods.s3.amazonaws.com/2e2e3323-b96c-46d3-8f95-d5bafdf51fed-pxl_20240224_060755057.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/e025ce3c-b41b-4703-940e-856b8d7b1465-pxl_20240224_060750795.jpg

Sat, Feb 24

This printer has printed more hours in the last 48 hours than since I got it

https://scrapbook-into-the-redwoods.s3.amazonaws.com/8918b3c7-b73d-4d5f-a7cb-30d949c8944b-img_20240224_033613.jpg

Fri, Feb 23

Why did the printer cross the road?...to go to the vexu tournament in Houston

https://scrapbook-into-the-redwoods.s3.amazonaws.com/0b8737aa-e22c-490f-a4c6-69cbd5f2759e-pxl_20240223_224436000.jpg

Fri, Feb 23

Chessbot PCBs arrived today!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/134e5617-d9c4-42dd-891c-38c45f40cf30-pxl_20240223_195512428.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/70d2fd54-ca01-4c65-9209-9f17b794db17-pxl_20240223_195506687.jpg

Fri, Feb 23

AAAAAAAA pre comp grind 🤖

https://scrapbook-into-the-redwoods.s3.amazonaws.com/b3f2e7aa-f104-4011-94e8-31cb15b169ad-img_20240223_000917.jpg

Thu, Feb 22

Robotics printing and programming

https://scrapbook-into-the-redwoods.s3.amazonaws.com/9a296128-a179-4972-8aeb-4dfeafb0e5b8-pxl_20240222_043019100.jpg

https://scrapbook-into-the-redwoods.s3.amazonaws.com/90027219-8326-4564-8e90-947697f84c7d-swervecontrolsoverunder.png

Wed, Feb 21

tried to install linuxcnc on a pi 3b yesterday and today but can't figure out how to get a real time kernel working properly. The official images are only for a pi 4 and 5 (like whotf even has a 5 its so new) and it's a nightmare so I tried installing regular raspbian 3 times but I kept getting the wrong versions (12 64bit, 12 32bit, 10 w/ kernel 5.4) and it kept dying. My next move is to try the kstepper kernel module to just step without any of the fancy cnc logic.

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Thu, Feb 15

My first time writing tests for microcontroller code, with platformio, for chessbot. Also loving chatgpt here github.com/ut-ras/chessbot/commit/491ec2a779f5e1c9f0a003f1ccf19160ef9d82be

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Tue, Feb 13

I have acquired the goods!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/28672732-a143-4f35-82bd-5a983abc5d41-pxl_20240213_184801662.jpg

Tue, Feb 13

I was playing around with this old ender 3 motherboard but couldn't get it to do stuff, but Jake got an Arduino mega with a shield running Marlin. Other than that I looked around for libraries for my tmag5273 magnetometer and tbh might just write my own because we need a very small subset of features, but while being very very efficient

https://scrapbook-into-the-redwoods.s3.amazonaws.com/cb8cf0f1-91cd-489e-b705-cb4f0c593955-pxl_20240213_013525164.jpg

Tue, Feb 13

More Chessbot! Looking at how practical a physical magnet would be as the dragging piece if attached to a servo

Mon, Feb 12

spent a lot of time working on robotics hardware and software github.com/VEXU-GHOST/VEXU_GHOST/pull/44

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Tue, Feb 6

finalized, got reviewed, and sent the chessbot row PCB to the ordering peeps today! github.com/ut-ras/chessbot/releases/tag/v0.1

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Sun, Feb 4

I captured the first waveform on my new oscilloscope!!! This is from my pocket PCB piano (prev. musical keyboard) speaker output. Effectively the output of a 555 timer!!! So exciting!!

https://scrapbook-into-the-redwoods.s3.amazonaws.com/4c1356ef-9cc8-4d55-9139-cea173e645b9-pxl_20240204_032143316.jpg

Sat, Feb 3

ITS ON Todo, see if I can actually get a signal

Sat, Feb 3

5cm

Sat, Feb 3

3cm

Sat, Feb 3

Insanity

Fri, Feb 2

got scopes 👀

https://scrapbook-into-the-redwoods.s3.amazonaws.com/6f37cbd5-a0bb-4418-8805-37d7dcea7ebb-pxl_20240202_194610548.jpg

Thu, Feb 1

Chessboard v2 is finished! This PCB sensor array is a single row that can be daisy chained, which makes things a lot cheaper. Going to get this ordered soon

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Thu, Feb 1

Cases printed!

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Tue, Jan 30

I got mad at Linux so doing a little hardware now. My first fully-from-scratch 3d model since I got my new printer, so pretty excited

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Tue, Jan 30

idek wtf is going on

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Sat, Jan 27

More VRC reffing

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Thu, Jan 25

Musical Keyboard v2 is here! Enjoy cheaper production, lighter weight, daisy chaining support, and some really cool (and other really gross) microscope shots!

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Thu, Jan 25

Spent like 4 hours debugging drivers, cuz apparently 2 of the drivers had some weird ground or capacitance issue where vref (for current limit) only worked when I had my finger (or multimeter probes :angry-dino: near it). So the motor didn't move unless I had my finger near the board. Ended up fixing it by switching to a 3rd driver which was apparently just fine?????

Thu, Jan 25

chessbot ESP32-DevKitC-v4 clone w/ Pololu DRV8834 motor drivers. Goal was to find out how well it runs at 5v (as opposed to 12v) (so I can simplify circuitry by having only one voltage rail). Answer was sufficiently well. Should be able to cross the board round trip in ~8seconds (ignore the video numbers)

Sun, Jan 21

its coming together!!!!!!!!

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Sun, Jan 21

pure, unfettered insanity

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Sun, Jan 21

woah I learned how to use the place footprint in matrix kicad plugin today this is so cool and fast and easy ❤️

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Sun, Jan 21

worked on chessbot today

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Fri, Jan 19

I'm so smart, using vim in the VSCode terminal

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Fri, Jan 19

ti.com doesn't have "education" as an option

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Fri, Jan 19

maybe with text?

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Wed, Jan 17

bunch of stuff arrived! now looking for an adjustable psu to test these... (the university makerspace is closed till next week)

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Tue, Jan 16

Some feature/cost analysis for chessbot today

https://scrapbook-into-the-redwoods.s3.amazonaws.com/a77bff63-bd11-4923-a0a2-61aaea8be976-image-18.png

Mon, Jan 15

@ThomasStubblefield on a scale of 1 to 10 how cursed is this

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Mon, Jan 15

LETS GOOOOO REAL CODING AFTER SO LONG I MADE A THING DO A THING. (an updating comment bot to help me review GH PRs) back to the basics, scripting to automate my work

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Sun, Jan 14

woah my schematic document is "advanced"

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Sun, Jan 14

I love Google

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Sat, Jan 6

Head reffed an (unofficial) VRC tournament today, quite an experience and definitely a very very interesting perspective on how hard it is

Sat, Jan 6

Did the Vex Robotics head ref exam, although can't officially be a head ref because I'm under 20, I'm reffing at an intra-district practice competition tmrw

https://scrapbook-into-the-redwoods.s3.amazonaws.com/62c1b0bf-acb8-43c8-9fba-d1b271f168bc-pxl_20240106_041544510.jpg

Fri, Jan 5

Did work work and restored my music server after my old server died

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Mon, Jan 1

Shipped Hot Dog and the Outernet Hot Dogumentary! youtu.be/oOEWn-E6v-w, one of my main #100-days goals

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Mon, Jan 1

Finally got video encoding working on kdenlive!!! Idk how, but I'm so excited to be able to edit fast + :leeks:

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Fri, Dec 29, 2023

I melted my favorite ruler running tests for #trident 😭

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Wed, Dec 27, 2023

working and studying today

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Mon, Dec 25, 2023

3 0603 capacitors on 1 pad, to test out tuning the touch sensor

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Mon, Dec 25, 2023

I finally got my #onboard keyboard under $50 (there's a $9 coupon) so it can be a jam!!! 🎹

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Sat, Dec 23, 2023

Printed a new case to make my TOTkey keychainable

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Mon, Dec 18, 2023

My 3d printer arrived!!!!!!!!!! Literally sooooo excited

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Mon, Dec 18, 2023

Guys ISTG I was going to sleep at a reasonable 11pm but now it's suddenly 1am and IDK what happened I have another fire hazard PCB on my hands. I assembled my COTS flyback generator board from Amazon more vlogs here: youtu.be/gE-u74lq6d8

Sun, Dec 17, 2023

I think I finished my scariest #100-days goal with these two ntfy PRs. Still need review and cleanup, but I'm so so so so excited! It was at the top of my TODO list for literal weeks cuz I tried different architectures and everything just seemed kinda sucky so I procrastinated, now I'm at a compromise that I can settle for. Hopefully binwiederhier likes it too

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Fri, Dec 15, 2023

Don't have interesting pictures because I probably shouldn't share proprietary designs but my first time extensively using Altium Designer for my internship at jcore.io which started yesterday

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Thu, Dec 7, 2023

Playing with my keyboard Onboard instead of studying discrete math. This is me and a friend who's very good at playing.

Wed, Dec 6, 2023

My musical keyboard arrived! 🎹

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Wed, Dec 6, 2023

My musical keyboard arrived! 🎹

https://scrapbook-into-the-redwoods.s3.amazonaws.com/c472cb64-0d70-4da7-b256-709078f9a407-pxl_20231206_204111100.jpg

Tue, Dec 5, 2023

My OnBoards are arriving soon!!!

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Tue, Dec 5, 2023

more android

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Sat, Dec 2, 2023

The obs stream I'm running: www.youtube.com/live/NDe4-1sApQM?feature=shared

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Sat, Dec 2, 2023

More vex robotics, running tournament manager this time

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Fri, Dec 1, 2023

scrapbook should not bug

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Fri, Dec 1, 2023

After finishing my research paper I can finally work on the ntfy bugfix again!

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Sun, Nov 26, 2023

Electronic Piano PCB ordered! Jam coming soon™. The gold/silver/circular pads are surfaces connected to capacitive touch sensors (they detect your finger by how it forms a capacitor with the circuit). I have different layers on those to experiment with which finish works best for touch detection in this design. But whenever each key detects touch, it allows the capacitor of the 555 timer (a frequency generator) to be charged at a rate determined by the variable resistor for that key (the potentiometers are at the top). Those potentiometers can be tuned to allow for different frequencies for each key. Then, the 555 timer outputs a signal into the speaker circuit, which you can then hear! What are your cool name ideas for this PCB? The best suggestion gets to be the jam title!

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Fri, Nov 24, 2023

slowly coming along - slower than expected, but should order early tmrw

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Thu, Nov 23, 2023

emailssssss

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Wed, Nov 22, 2023

This is a 555 timer driven speaker, and the RC on the 555 timer charges up at different rates (the Timer label) based on which 'key' is connected. The keys are the individual boxes, each of which has a capacitive touch sensor IC that connects its potentiometer to the 555 timer label, which then charges up the RC based on the potentiometer value (the speed of charging changes the frequency). Basically a capacitive keyboard.

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Mon, Nov 20, 2023

getting started with android development for the first time in well over a half dozen months (I don't think anyone says that, but it's funny)

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Mon, Nov 20, 2023

Not sure what to use for the scrapbook photo but MC'd a vex robotics tournament (message for scrapbook)

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Mon, Nov 13, 2023

Too much money but oh well hopefully I get that apple experience that everyone says bambu offers

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Tue, Nov 7, 2023

finally compiled a bambu studio for NixOS and got 3d printer trained

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Tue, Nov 7, 2023

Chessbot

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Tue, Nov 7, 2023

Don't have pictures of the whole thing but I got recruited onto chessbot ig, an electromagnet CNC drags the chess pieces around

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Sun, Nov 5, 2023

Emailsssssssss

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Fri, Nov 3, 2023

Visited the map room that has 3D maps. Sooooo many maps

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Tue, Oct 31, 2023

♥️usb

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Mon, Oct 30, 2023

This is what the picture sounds like

Mon, Oct 30, 2023

Did SSTV today

Fri, Oct 27, 2023

Dunno what picture to put but I checked into my first ham radio net today (N5OAK) along with others from N5XU

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Wed, Oct 25, 2023

!!!

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Wed, Oct 25, 2023

I listened to the weather station using my HackRF today

Tue, Oct 24, 2023

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Sat, Oct 21, 2023

Needs more inspection and sanding but the antenna looks intact

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Fri, Oct 20, 2023

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Fri, Oct 20, 2023

That's a comedic feature not a bug

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Wed, Oct 18, 2023

Worked on THE BOX #time-capsule, need better name ideas for the time capsule than Treasury of Hackers' Exhibits Bridging Out-of-the-box eXperiences, need help with art

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Tue, Oct 17, 2023

Sponsor emails

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Wed, Oct 11, 2023

Laser cutter trained at TIW

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Wed, Oct 11, 2023

So, it has come to this

https://scrapbook-into-the-redwoods.s3.amazonaws.com/958bc249-5db7-43bb-aadf-ce6d7e97eeaa-image.png

Mon, Oct 9, 2023

Motor driver done

https://scrapbook-into-the-redwoods.s3.amazonaws.com/f064c65a-0a4b-475a-bef2-38d39ca04d63-image.png

Mon, Oct 9, 2023

Whoaaaaa @rivques put my name in the startup sequence of the TOTkey they sent me :ultrafastparrot: (their onboard project)

Thu, Oct 5, 2023

Waterarms on campus 😳

Wed, Oct 4, 2023

We're back!!!!

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Sat, Sep 23, 2023

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Mon, Sep 18, 2023

MD Tables in Jams!!!

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Sun, Sep 17, 2023

$14.09 from university auctions, need ideas for what to do with those

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Sun, Sep 3, 2023

Taking apart a fan to try to backdrive LEDs from its rotation step 1

Thu, Aug 31, 2023

(literally) got my hands dirty after a long time with a disassembled motor and a crappy electromagnet

Sat, Aug 26, 2023

Using ROS2's multi device communication to send Intel realsense camera data from a Jetson nano to my laptop

Wed, Aug 16, 2023

I was wondering why electrical systems have 3 sinusoidal phases and why generators are typically built with 3:4 coils:magnets. So, I graphed the magnetic field strength at various phases to find out: www.desmos.com/calculator/buqj2pdezs

https://scrapbook-into-the-redwoods.s3.amazonaws.com/8d5b7b38-6ff8-4d66-917b-241abc6a3344-image.png

Tue, Aug 15, 2023

I invented a revolutionary new technology called SafeMag to make wireless charging better for free, AMA

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Sat, Aug 5, 2023

I made a thermostat circuit with hysteresis (i.e. dead zone, it'll keep cooling to a lower temperature, and only turn on when rising at a higher temp to prevent rapid cycling) and simulated it in KiCAD's ngspice!!! Using a 555 instead of just an JK Latch because the rest of my circuit uses it. Now let's see if I can replace the Comparators w/ 555s too.

https://scrapbook-into-the-redwoods.s3.amazonaws.com/a95c8b1e-140a-45f4-9781-1716f2ced2fb-image.png

Thu, Jul 27, 2023

With the release of this video I can officially say I'm fully done with (the hardware of) my first #onboard PCB: www.youtube.com/watch?v=px2V8bZMeLI

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Mon, Jul 24, 2023

It's done!!!

Mon, Jul 24, 2023

Sat, Jul 22, 2023

Gee, I wonder why my USB interface is not working

https://scrapbook-into-the-redwoods.s3.amazonaws.com/ce3b040c-2cb0-4c82-b5bf-a414cbf2a543-image.png

Sat, Jul 22, 2023

The core concept works!

Sat, Jul 22, 2023

Angle measurement and USB coming soon #onboard

Mon, Jul 17, 2023

Manually recovering each file of my website since Jun '22 from my broken disk image is so fun. Ripgrep is 🔥 though.

https://scrapbook-into-the-redwoods.s3.amazonaws.com/5def65a3-8389-41f8-928d-60c717dc079c-image.png

Sun, Jul 16, 2023

I like that Go Replace actually works unlike yarn link

https://scrapbook-into-the-redwoods.s3.amazonaws.com/3a24523b-251c-49cf-8126-44c9f24dfb10-image.png

Fri, Jul 7, 2023

Finalizing my workshop and to procrastinate finalizing my workshop I'm making paper 1:1 (2D) mockups for my TOTP device

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Sun, Jun 25, 2023

Yeah these are easily the 4 hardest to route. Thankfully it's just RESET not a signal or power trace so it can be super thin and jump around a bunch.

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Sun, Jun 25, 2023

Yay I installed NixOS on an Orange Pi Zero with an Allwinner H2+ (armv7l). Embedding the bootloader in the SD Card image was kinda complicated, but cross compilation simplified things. Here's my flake: gist.github.com/karmanyaahm/5dc741b52dfbf6cbcb32da2fc90a31e3

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Sun, Jun 25, 2023

im sooooo close to finishing my #onboard project

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Fri, Jun 23, 2023

Trying to get an orange pi running

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Thu, Jun 22, 2023

cuz I obviously had to flip DIN and DOUT in kicad

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Mon, Jun 19, 2023

Ok I spent 5 hours last night trying to figure this out, but what worked was just sleeping. I woke up a Eureka moment regarding this power ORing design. So, I have a battery (say +3V min) and USB (+5V). I want to drive VDrive from the USB when it's connected, else the battery. img1 is what Unexpected Maker's feather s3 does. img2 is the most basic ORing design. img2 will mix the two inputs in the right way because the battery has a lower potential. The BATT Diode has one job: Protect the battery from charging directly through USB. Then, because the battery has a lower potential, the battery won't push current. i.e. when USB is plugged in and VDrive is 4V (assume diode voltage drop of 1V), because the Cathode of the diode is more positive than the Anode, VDrive is 4V & BATT is 3V. So, no current will flow from BATT to VDrive. When USB is unplugged, pretend that half of the circuit doesn't exist and BATT powers VDrive. However, Vdrive will be at 2V, because the diode drops some voltage from BATT. Now, why is img1 better? it seems more complicated. But, the trick is that instead of a fixed voltage drop, turning the MOSFET on causes the drop to be ~100 mOhms. At 1A, that is a .1V drop - significantly better than the diode - not only does it save energy, it allows you to use the battery down to a lower voltage. There are 3 states to this MOSFET arrangement: 1. VUSB is 5V, VBAT is 4V. G > S. Transistor does not conduct. Additionally, since S > D, no potential gets applied backwards onto the battery. 2. VUSB is 0V, VBAT (D) is 4V. G = S = 0. Now, since S < D, current can flow across the body diode. This brings S up to 3V. 3. Now - S = 3V, G = 0V, G < S and the MOSFET is enabled. 4. If VUSB is enabled again now, go back to step 1. None of this probably makes any sense but I should clean it up and write a blog post.

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Tue, Jun 13, 2023

me debugging yaml

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Sat, May 27, 2023

PCBing

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Tue, May 23, 2023

Day 99? of Winter Hardware Wonderland - Project Oreo Custom Rubber Ducky I left a parting gift for my CS teacher. Next year 1st pd CS will find this beauty.

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Thu, May 11, 2023

Soldering male connectors to the headers on an Arduino Nano (We have to get Mr. Robot done next week and don't have time to order proper jumpers 🙃)

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Mon, May 8, 2023

KiCad tutorial learning PCB Design

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Sun, Apr 30, 2023

Blog Post time! karmanyaah.malhotra.cc/projects/2023/04/amplitie (scrapbook entries converted to a blog post)

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Fri, Apr 28, 2023

Look Reese, train

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Wed, Apr 26, 2023

Dallas #vrc day 2 vex robotics competition

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Wed, Apr 26, 2023

Dallas #vrc Vex Robotics Competition

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Tue, Apr 18, 2023

Edited 3 videos today and now I am the tech tips man. :youtube: www.youtube.com/@highriskhighrewardtech Also I need a better name.

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Sun, Apr 16, 2023

My NixOS PR finally got merged after only ... checks⌚... 2.5 months and 20 million revisions github.com/NixOS/nixpkgs/pull/213816

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Sun, Apr 16, 2023

Mega UIL Score table version 2.0: I actually have 2023 data now, and sorting kinda works. Getting ready to publish the data collection Python script and rendering JS frontend soon. ipfs.karmanyaah.malhotra.cc/ipfs/QmP65VKrAwLakZZRiJ3861RZW2PvP7znrkCPkULaS2J1Rh

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Wed, Apr 12, 2023

Restoring Mr Robot with Vex Cortex and ROBOTC milestone (with @Jaxzog)! The master brain is now talking to the follower and successfully sending values over UART!

Mon, Apr 10, 2023

Visiting UT Austin!

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Sat, Apr 8, 2023

I ~~wasted~~spent my whole day making a mega UIL result table. It's not very good, but using Python to scrape the website and Tabulate/JS (the bane of my existence) to table it, I'm making progress. It's also surprisingly fast at filtering, given it's all JS. ipfs.karmanyaah.malhotra.cc/ipfs/QmRhU23SFgfP4ku4c3X4BK2rKkkduNf7tmFmND24srstPb

https://scrapbook-into-the-redwoods.s3.amazonaws.com/253ca4fa-03e6-49f9-9674-36fd8e8ce038-image.png

Wed, Apr 5, 2023

Installing headers to adapt the ports to a vex cortex brain for Mr. Robot (a Lego technic based humanoid)

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Tue, Apr 4, 2023

Ampli-Tie final day 5, March 25th - the day has arrived! - Solder the microcontroller (I'm just powering it off the mCu USB port, past me calculated a peak of 100mA would be reasonable, future me found out the whole thing only consumes 26mA). - Copy a whole bunch of code off Adafruit, but the mic doesn't work, turns out, for some reason, my painted mic is broken and always outputs 3.6v. Hurriedly swapped to another mic, unpainted, so it would have to hide under the collar (T-2hrs). - Still cannot get the mic to work (T-90m). Might as well get static effects working. Got timing on rainbow cycling adjustable from the app, and made sure static color worked. - (T-60m) it works! Now I actually gotta tie the tie and dress up.

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Tue, Apr 4, 2023

Ampli-Tie backlog pt 2! Day 4, Friday, March 24th. Skipped school and the pressure was on, I have to get something working before tomorrow. I also have UIL this evening and tomorrow morning so just have ~9 to 4. - painted microphone - sewing, sewing, and sewing - I made the hard decision of splitting it into two halves, one above the name tag, and one below because connecting them was a nightmare. So, I used a wire to connect them (I got this really nice stranded 24AWG silicone wire that is extremely flexible and blends in perfectly). OTOH, connecting the two halves using an actual wire created a "highway" that reduced the resistance (conductive thread) from the microcontroller to any individual LED).

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Tue, Apr 4, 2023

Ampli-Tie backlog! Day 3 (March 22) - sewing + acquired fray check to tie up loose ends Day 4 (March 23) - Hours and hours of sewing - After having to hold open these tight spaces gimme my surgery license already - first test, using alligator clips to connect the microcontroller and power 🎉

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Tue, Apr 4, 2023

I made a standalone PNG Polyglot generator today. A low dependency, low memory way to hide scripts in PNGs, because it's made to run in CircuitPython. gist.github.com/karmanyaahm/03025089054fa4568bc47eb14d1aff51 (offspring of winter hardware wonderland #hardware-party Project Oreo)

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Tue, Mar 21, 2023

Custom Ampli-Tie Day 2 - Step 2,3 1. Sizing and learning how to tie a tie 2. Placement tests (fewest lights that'll look decent) - 13 LEDs every 3 cm apart was optimal 3. Harvest Flora NeoPixels from an old non-functional project and then spend foreverrrrrr cleaning them (removing the superglued thread) 4. Ordered microphone and ribbon cable

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Mon, Mar 20, 2023

Custom Ampli-Tie Day 1 - Step 1 Power consumption testing of 16 Neopixels (and the start of my real life engineering notebook, thanks #vrc :/)

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Sat, Mar 11, 2023

#frc today, big robotics week

https://cloud-l0dylag3g-hack-club-bot.vercel.app/0img_20230310_211021.jpg

Sun, Feb 26, 2023

My ntfy change got merged! docs.ntfy.sh/releases/?h=releases#ntfy-server-v210 github.com/binwiederhier/ntfy/pull/633/commits

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Sun, Feb 26, 2023

:winter-hardware-wonderland: #hardware-party Day 12 building a custom USB rubber ducky: Edited a (draft) image and presented on the :winter-hardware-wonderland: 🚢 :emergency-meeting:

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Sun, Feb 26, 2023

:winter-hardware-wonderland: #hardware-party Day 12 building a custom USB rubber ducky: Edited a (draft) image and presented on the :winter-hardware-wonderland: 🚢 :emergency-meeting:

https://cloud-b22yb93vw-hack-club-bot.vercel.app/0pxl_20230224_215436580.jpg

Sat, Feb 25, 2023

:winter-hardware-wonderland: #hardware-party Day 11 building a custom USB rubber ducky: I shot the wallpaper image I will put on people's computers using my rubber ducky and assembled and soldered most of them. Huge thanks to @Jaxzog and my other friends who helped set up this set (it took like 4 hours) So close! I just need to finish my informational pamphlet, finalize the mac code, and edit the photo. (I'm in the epoch hoodie w/ the soldering iron (yes, that's a cage nut tool))

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Fri, Feb 24, 2023

:winter-hardware-wonderland: #hardware-party Day 10 building a custom USB rubber ducky: Finally, assembly and soldering 👏. The resin cases are nearly indistinguishable from molded plastic, I'm impressed. The good batches also fit like a(n expensive, high-quality) glove. We also set the set for the wallpaper photoshoot at school. Don't have a trench coat, but I'll do my best black hat imitation tomorrow. 🎩 Finalizing both tomorrow.

https://cloud-ptjwe89jr-hack-club-bot.vercel.app/0img_20230223_234151.jpg

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Thu, Feb 23, 2023

:winter-hardware-wonderland: #hardware-party Day 9 pt 2 (lost count) building a custom USB rubber ducky: I don't know how Hak5 does their thing, but I got the full fingerprint from Windows and frequency charted the bRequest values, and there aren't more than 2 Configuration params (8 and 9). Maybe I was looking at the wrong value, or parsing it wrong, but I'll just stick with my old working method.

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Wed, Feb 22, 2023

:winter-hardware-wonderland: #hardware-party Day 9 building a custom USB rubber ducky: Trying longer fingerprints to copy HAK5's number of configuration descriptor-based detection, and I realized I'm dum dum The setup transaction wasn't just ~250 bytes, I was using a char-based counter, which must've been wrapping. Oh, C.

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Wed, Feb 22, 2023

:winter-hardware-wonderland: #hardware-party Day 8 building a custom USB rubber ducky: Not much material progress today, but me and @Jaxzog brainstormed ideas for the image to set the wallpaper to. I also got started w/ an instruction manual/explanation for if someone overreacts to being pranked.

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Tue, Feb 21, 2023

:winter-hardware-wonderland: #hardware-party Day 7 building a custom USB rubber ducky: @KaiZheng-U049N5Y0WM9 shipped my cases today ❤️!!! (Yes also the UPS people spelled my name wrong) I asked @reesericci for help testing the Mac version of my script at the Austin Central Library. They have computers that reset everything, including permissions, which helps test how the script will behave on new never-used-the-terimnal computers. Thanks reese! (Deleted and reposted for...reasons)

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Mon, Feb 20, 2023

:winter-hardware-wonderland: #hardware-party Day 6 building a custom USB rubber ducky: @KaiZheng-U049N5Y0WM9 printed some cases today!!!

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Sun, Feb 19, 2023

:winter-hardware-wonderland: #hardware-party Day 5 building a custom USB rubber ducky: Open Sourced all the code I worked on yesterday on GitHub: rubber_ducky, circuitpython, and tinyusb. Next step is to make it upstream-able. Also sped up the Windows Powershell payload with @Jaxzog, and made it hide in the background. If anyone has any ideas on how to make this shorter/faster, I'd love to hear it (powershell experts :pleading:)! github.com/karmanyaahm/rubber_ducky/issues/1#issuecomment-1435768480

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Fri, Feb 17, 2023

Day 4 of Winter Hardware Wonderland :winter-hardware-wonderland: , #hardware-party building Project Oreo, a custom USB rubber ducky: Core software finally integrated!!!!! (unoptimized tho)

Fri, Feb 17, 2023

Day 4 of Winter Hardware Wonderland :winter-hardware-wonderland:, #hardware-party building Project Oreo, a custom USB rubber ducky: the 3d printed case prototype. Just need a couple of minor changes before finalization

https://cloud-rf85afw2l-hack-club-bot.vercel.app/0img_20230217_141239.jpg

Fri, Feb 17, 2023

Day 4 of Winter Hardware Wonderland :winter-hardware-wonderland: #hardware-party, building Project Oreo, a custom USB rubber ducky: I fixed the pointer const issue by literally just adding a (void*) and now I'm getting fingerprints!!!!! (I need to change uint16 to uint8 but I'm very excited) Woo!!!!!

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Fri, Feb 17, 2023

Day 3 of Winter Hardware Wonderland :winter-hardware-wonderland:, building Project Oreo, a custom USB rubber ducky: I got some sick renders of the case (Inventor Ray Tracing). Hopefully the prototype print tomorrow is successful, then I can send it to @KaiZheng-U049N5Y0WM9 🤞 On the software side, I have the core code (capture the first 10 setup packets and make a python function to receive them). It just doesn't work 😦. TODO Debug

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Thu, Feb 16, 2023

Day 2 of Winter Wonderland #hardware-party :winter-hardware-wonderland:, building Project Oreo, a custom rubber ducky. On the software side, I got CircuitPython building in a Pure Nix Shell. Turns out, some Python libraries are built using flint instead of setup.py. Thankfully, there's a mode in Nix to handle that. I can now modify the code that ships with a UF2 by default, making deployment just a one-file-copy (very important when you have 20 of something). Next steps: Look at Micropython manifests to figure out how to include data/image files in the UF2. Track the received setup packets (host fingerprint), and make a function to transmit those to Python from C. On the Hardware side, my friend designed and 3d printed the first prototype of the case at school. It doesn't quite fit (see USB Port area), so needs a second prototype.

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Wed, Feb 15, 2023

My school got 5 4331s and 10 9200L-24t-4G-Es from Cisco and I'm in charge of setting up the first one :partyparrot: with no Cisco experience whatsoever (except teacher's help who is CCNA)

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Wed, Feb 15, 2023

Submitted a PR reworking ntfy's rate limiting github.com/binwiederhier/ntfy/pull/609. What's sleep when you can hack?

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Wed, Feb 15, 2023

Day 1 of Winter Hardware Wonderland :winter-hardware-wonderland: : 1. Collected even more USB Setup phase fingerprints with my old Digispark-based device. Now I just need two types of teachers' HP Laptops and M1 Macs. 2. Building Circuitpython is haaaaaaard. The crazy dependency management is the primary reason I hate embedded things. Maybe I should Nix this... 3. @KaiZheng-U049N5Y0WM9 agreed to 3d print my cases and ship them to me ❤️. I need to hurry up on finalizing the design so they get here on time. Making a better open-source USB Rubber Ducky with OS Detection www.youtube.com/watch?v=FbiJCnHBr70&list=PLxlDG2SH_6rvZrNAuVXI0BIdv7MWvkMNm

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Mon, Feb 13, 2023

Got some fingerprinting going with digisparks. Now I need to find patterns, maybe build an auto-pattern finder idk. I modified the Digispark USB library for this: github.com/karmanyaahm/rubber_ducky/blob/a327a965d21e93979edef3e88a16825134a1b6fa/printUSB/usbdrv.c#L421-L462 And wrote some code to pretty print that data: github.com/karmanyaahm/rubber_ducky/blob/main/printUSB/printUSB.ino tags: winter hardware :winter-hardware-wonderland:, C++

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Thu, Feb 9, 2023

Did someone say push notifications in the FOSS F-Droid version of Nextcloud? Edit to clarify: nr23730@github.com has been working on a version of Nextcloud that supports UnifiedPush. Originally, we thought it would need a gateway (a server that converts between push formats) to function. However, reading through the Nextcloud code, I realized that they don't have any URL normalization, they just append "/notification" to the provided URL (caused the need for a gateway in the first place). So, I realized, we could just add a "#" to the end of our push URL, like ntfy.sh/upABCDEFGH?up=1#, then, Nextcloud will send notifications to ntfy.sh/upABCDEFGH?up=1#/notification, which is effectively our original URL! (Stuff after # is ignored). One of the most useful (benign) injection attacks I've ever come up with. Boom! No gateway Nextcloud UnifiedPush: github.com/nr23730/nextcloud-android/pull/1/files

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Tue, Jan 31, 2023

My first contribution to NixOS!!! (for IPFS Kubo) github.com/NixOS/nixpkgs/pull/213816 (scrappy: nix)

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Tue, Jan 31, 2023

mmmm Nix. Moved my website to my new NixOS IPFS Caddy server running on Hetzner with vastly better reliability than my previous Ubuntu/Oracle Free tier server. github.com/karmanyaahm/nixos-ipfs-caddy-web-server Image pre-cache/post-cache

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Mon, Jan 30, 2023

SMH, why are there no papers about USB OS fingerprinting using control/setup requests like github.com/krakrukra/PocketAdmin/wiki/fingerprinter :abraham-thinkin: There are so many based on timing.

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Thu, Jan 26, 2023

Ordered winter wonderland supplies! (and a little something for myself, donating money to bank) bank.hackclub.com/project-oreo

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Thu, Jan 26, 2023

my USB Rubber Ducky scripts can block mouse movement with a repeated mouse.move(x=-100,y=-100)

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Wed, Jan 25, 2023

Some reading... (slack is being stupid and not showing my image for some reason)

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Fri, Jan 20, 2023

Migrated k.malhotra.cc, my URL shortener and Golang vanity URL thing, from a dedicated CGI python service to a Jekyll collection and some IPFS redirects under my main website, one less thing to build and deploy.

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Tue, Jan 17, 2023

The first draft of redoing rate limiting for UnifiedPush in ntfy. This makes rate limits for UP topics count toward the receiver (phone) rather than the sender (large application server sending to a lot of people). This will remove the need for rate limit exception lists managed by hand. github.com/binwiederhier/ntfy/pull/584

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Sat, Dec 31, 2022

:epoch-tx: Mac Version of USB Rubber Ducky background changer we made @ Epoch TX (and subsequently lost the USB :P) Code: github.com/karmanyaahm/rubber_ducky/blob/096cc5ca15d37e1913747e22ab636f7e53cee582/v2win/mac/mac.ino

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