@todbot@mastodon.social
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todbot

@todbot@mastodon.social

runs ThingM, maker of blink(1) USB LED & BlinkM, co-founder CrashSpaceLA hackerspace, Pasadena, CA, he/him #electronics #circuitpython #arduino #rgbled #usbhid #blink1 #raspberrypipico #diysynth #eurorack #synths #synthesizers #midi #openhardware #opensource #pasadena

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todbot, to random
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Yay, a new Engineerguy (Bill Hammack) video! I love his stuff. And this one’s about duct tape! https://www.youtube.com/watch?v=E-F2QQuZZGk
#engineerguy #ducttape

todbot, to random
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Finally. Finally! A toilet light with star projector.

todbot, to random
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Hey fellow Neopixel/WS2812 fans: know of any in-production versions of smaller LED rings using 3535- or 2020-sized WS2812/SK6812 LEDs? (as opposed to the standard 5050 sizes most rings use) Seems like it’d be a great solution for putting around pots/encoders. I can’t find any on Ali
#ws2812 #sk6812 #rgbled #neopixel

aallan, to random
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After just over four years, today will be my last day at @Raspberry_Pi. It’s been a great place to work! I’ve really enjoyed my time there and hope I’ve visibly made some difference to the quality of writing and documentation around the products. Because documentation is always just about helping people get things done.

todbot,
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@aallan @Raspberry_Pi Thank you, Al! The docs are top-notch,
I have at least one of the PDFs open daily as reference.

todbot, to random
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“pico de gallo” implies the existence of a “mega de gallo”

todbot, to Arduino
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I’m pretty proud of my THX Deep Note sound recreation attempt, which I realized I only posted on Twitter (RIP). So I upload it to Youtube & here. The Mozzi synth library is great and it was fun getting it to do this. And thanks to Mike Rugnetta for getting me near the rabbit hole of the THX sound!
Code: https://github.com/todbot/mozzi_experiments/blob/main/derpnote2/derpnote2.ino
Youtube: https://www.youtube.com/watch?v=7fX8cBwbOmU

A tiny breadboard hosts a tiny circuitboard and a headphone jack going to a bluetooth speaker. The circuitboard is powered by a phone battery pack via a small red USB cable. A hand plugs the cable into the battery pack to start the sound playing.

todbot,
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@brainwagon Thanks! Yeah the most I’ve seen from the creators is this score released by THX a few years ago

todbot, to random
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Several folks asked if they could get the little capacitive touch wheels I made as a badge add-on giveaway for Hackaday Supercon 2024. Now you can get them in my Tindie store!
Demo video of using two on a breadboard:
https://youtu.be/Db7S75eE-G8
Tinde link: https://www.tindie.com/products/todbot/touchwheel0-capacitive-touch-wheel/
More details on the code and board files if you want to make your own: https://github.com/todbot/touchwheels/

todbot, to random
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Oh boy! I just got an ad for Featureless Grey Cylinder! I love Featureless Grey Cylinder!

todbot, to random
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I just want to summon the occasional demon with my string art and iPod, is that so wrong? https://wandering.shop/@cstross/112247546669317212

todbot, to genart
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There’s a neat new core library in CircuitPython: bitmapfilter. Originally designed for the PyCamera project, it’s got many useful operations for generative art stuff like I do in Processing/p5js. Here’s a start: random circles bluring away. note, it does require a fast processor like the ESP32-S3 as on this great Lilygo board. Code: https://gist.github.com/todbot/5b649b0ff314f2e723b6dd68d36c05b5
Thanks @stylus for your work on this library!

Tiny Lilygo ESP32-S3 TDisplay board showing a bunch of randomly colored circles that slowly blur and fade away

todbot,
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@stylus Now playing with bitmapfilter’s Photoshop-like channel ops to give a nice fade-to-black for evolving spirograph-like shapes. I love how it looks like blossoming flowers sometimes. These whole-screen updates really highlight how fast the 8-bit parallel displays are on these Lilygo boards.
Code: https://gist.github.com/todbot/8ea13cebb1c3a510444428cc98d2f1af

Tony circuit board with a display showing a spirograph-like pattern that evolves as old versions of it fade away

todbot,
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@stylus Now noisy lissajous trails that combine a channel op for style-based fading and a Gaussian blur on the fade, with the fade style changing every few seconds. Mesmerizing to me! I just stare at this for minutes. Here’s a sample. Code: https://gist.github.com/todbot/224c690a9fc2c15e972a2e963deb13fa

Tiny circuit board with display showing a swirling swarm of random lines moving in a Lissajous-like pattern, leaving trails that slowly fade and blur. After a few seconds the style of fading changes, yielding different visual effects

todbot, to animals
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He was risen. Now he’s back asleep
#Caturday #IsEveryDay #CatsOfMastodon

todbot, to random
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I like that my autocomplete turns “regex” into “regret”

todbot, to random
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More CircuitPython capacitive touch sensing madness w/ the Pico. Now I can do touch sliders and touch wheels. Is this board interesting to anyone else, should I put it in my Tindie store?
https://www.youtube.com/watch?v=n9cSR43akds

todbot, to animals
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Backyard jungle #Caturday
#CatsOfMastodon

todbot, to kicad
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Woohoo I am a KiCad master now! Or at least I know enough to default to it instead of Eagle. Finally. Plus I found a neat capacitive touch sensor chip that I got working in CircuitPython and Arduino on a Pico
#KiCad #CircuitPython #RaspberryPiPico #CapacitiveTouch

Two hands hold a blank PCB with 20 touch pads on one side and traces on the other. Underneath, two of the same kind of PCBs are plugged into a breadboard with a Raspberry Pi Pico and a grid of LEDs, and tapping on the pads lights up a corresponding LED.

todbot, to DOOM
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Finally I can run DooM on my toothbrush https://www.youtube.com/watch?v=cO-Are8053g
#Doom #ESP32 #WiFi #toothbrush #HardwareHacking

todbot, to animals
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Glowing #Caturday whiskers in the sun
#CatsOfMastodon

todbot, to random
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I made a little 3d-printable case for my “qtpy_synth” test board to help me play with CircuitPython synthio (and Arduino Mozzi). It works pretty well, I like it better than the standoffs I originally started with. And now can have some cool matching 3d-printed knobs! https://www.printables.com/model/757087-case-for-qtpy_synth-circuitpython-synthesizer
more about qtpy_synth: https://github.com/todbot/qtpy_synth

todbot, to eink
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Amazing video by upir showing custom segmented e-ink-like displays using new on-demand electrochromic printing! Controlled with an Arduino! And with Posy's cool segmented designs. They look really great. https://www.youtube.com/watch?v=jz01j1TpM84
#upir #posy #displays #segment #eink #arduino

todbot, to Arduino
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Got a shiny new #Arduino but can’t get the bootloader recognized. Any tips?
(From: https://reddit.com/r/arduino/comments/1aimx0l/always_double_check_for_typos_before_ordering/

todbot, to keyboard
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Anyone else knows HID “System Control” commands or USB keyboard sleep/wake magic? I think I implemented it correctly in CircuitPython and seems to function mostly correct on Windows but on MacOS, it brings a "Are you sure you want to shutdown? dialog. https://gist.github.com/todbot/5cd232e16c7a67bd2172d6719f8a8518
#CircuitPython #USB #USBHID #HID #keyboard

todbot, to random
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One week, 7 tracks! I’ve been trying “Jamuary” for real this year: track per day for a month. Trying to only spend 30 mins on the idea and 30 mins practicing / “performing” on camera. Haven’t busted that budget too badly, but oof it’s hard not getting side-tracked. The playlist thus far:
https://www.youtube.com/playlist?list=PLW9arycjoILjyq-uJbEUzIWd_b7Sj8hvV

todbot,
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Jamuary is officially done for me. I made it to 26 tracks, ran out of steam towards the end 🫠 It was a really fun exercise to come up w/ a new idea each day! It also forced me to learn the Deluge & Virus more, probably the biggest win. And got some good ideas for exploration later
https://www.youtube.com/playlist?list=PLW9arycjoILjyq-uJbEUzIWd_b7Sj8hvV

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