Finally calling this done! Say hello to the HellSplit a hand-wired, asymmetric 40% split #ortholinear keyboard with vertical column stagger and two rotary encoders. Powered by a pair of Raspberry Pi Pico's #RP2040 and #KMK firmware
#mechanicalkeyboards #splitkeyboard #ergo #otho #mechkb #splitkb #pipico #raspberypipico #40percent #handwired #circuitpython @circuitpython @RaspberryPi @rpimag
Someone asked how play multiple simultaneous CD-quality WAVs from an SD card to I2S DAC on ESP32 in CircuitPython. Turns out: possible! Can get a bit glitchy if doing USB stuff tho https://www.youtube.com/watch?v=97OA6L9PLCg
code: https://github.com/todbot/circuitpython-tricks/blob/main/larger-tricks/wavmix_s2mini_i2s_sd.py
#CircuitPython #i2s #esp32
#CircuitPython 10.0.0-alpha.8 released!
https://blog.adafruit.com/2025/07/08/circuitpython-10-0-0-alpha-8-released/
Highlights of this release
- Increase the firmware partition size for ESP32-S3 boards with 4MB flash, allowing more features to be included, including BLE. You must update the TinyUF2 bootloader on these boards. See the release notes for details.
- Merge updates from MicroPython v1.25.0.
- Fix regressions caused by SD automount capability.
- Add `Terminal.cursor_x` and `.cursor_y`.
- Add `picodvi.Framebuffer.color_depth`.
The AIO-connected #CircuitPython workshop thermal camera guide is is now available in #Adafruit Playground. It was a fun project with a few challenges, notably coming up with a method to minimize the bitmap image upload size. #AdafruitIO https://adafruit-playground.com/u/CGrover/pages/aio-connected-workshop-thermal-camera
I wrote a little tool to show what "board.*" defines for a #CircuitPython build. I got tired for always trawling through ports/*/boards for it. It's called "cirpy-showpins" and its output looks like the below. I used #Perl originally but here's it in Python: https://gist.github.com/todbot/e91853b9d5e021405bb9a85081a39163
Finally got around to a #circuitpython experiment I’d been thinking about for a while. OV5640 camera breakout wired up to a metro RP2350 with PSRAM. Video feed is send via HSTX DVI. In the code, the video is dithered gameboy camera style and the color is controlled with 3 pots (not yet wired up). I really like how the video feedback looks with the dithering
I've made *many* little SynthDIY boards over the years, targeting: low-cost, for newbies, Pico & CircuitPython. Here are some.
I've never been quite satisfied w/ the results.
Maybe the solution is more knobs & more choc keyswitches?
Good idea?
#SynthDIY #RaspberryPiPico #CircuitPython
Finished building my new hardwired split mechanical keyboard this weekend! #3dprinted based on my own design, spray painted and powered by a pair of Raspberry Pi Pico W’s. Of course, it’s running my fave #keyboard firmware #KMK! Sadly #CircuitPython doesn’t yet support BLE on the PicoW so it’s not wireless yet, but I’m just counting down the days!
(more details in the image alt text!)
i have a new video out about trying to control a #pocketoperator with #midi and #circuitpython
MIDI Controlled Pocket Operator?
MIDI violin using a USB mouse made with CircuitPython. Mouse movement controls the volume, while capacitive touch buttons determine which note plays.
For the last month or so I've been working on seeing how far I can push CircuitPython into emulating a TB-303 bass synth. With the new audiofilters library, you can "stack" filters to make two two-pole filters seem like a 4-pole filter, getting close to that squelchy sound we need. My efforts so far:
https://www.youtube.com/watch?v=1AflpXbEIno
#circuitpython #tb303 #synthdiy #raspberrypipico
i built a new musical robot- this time for a smol toy piano xylophone: https://learn.adafruit.com/solderless-robot-toy-xylophone
coded in #CircuitPython and it doesn't require any soldering. it also has two modes: live #MIDI or music box. Live MIDI listens to incoming MIDI messages over USB, while music box mode plays back MIDI files (.mid) saved on the CIRCUITPY drive.
#CircuitPython 9.2.8 released!
https://blog.adafruit.com/2025/05/28/circuitpython-9-2-8-released/
Highlights of this release:
- Fix deque bug.
- Fix I2S audio file read causing memory corruption.
- Support “Spectra6” six-color e-ink displays.
- Fix audiodelays.Delay when freq_shift=True.
- Board fixes.
New episode of The CircuitPython Show and the final episode of season 5! Meet Justin Myers, who wrote the connectionmanager library in #CircuitPython, making networking easier. https://www.circuitpythonshow.com/@circuitpythonshow/episodes/justin-myers
#CircuitPython 10.0.0-alpha.6 released!
https://blog.adafruit.com/2025/05/17/circuitpython-10-0-0-alpha-6-released/
Highlights of this release:
- Fix regression causing errors on ARM processors.
My Raspberry Pi Pico 2-based Dub siren now has a simple synth engine in addition to a sample engine, so its sounds now range from classic siren sounds to air horns and vocal snippets.
In this short video I show off the synth engine: 
https://v.basspistol.org/w/qmjJ3TY8Q8mEzigVywDXmt
thx again 2 @todbot
And if you haven't seen it yet check out this video for yesterday's exploration of the sample engine: 
I was inspired by @todbot's latest #CircuitPython audio effects experiments, so I had a go at incorporating what I learned into a DIY Dub siren. It consists of a Raspberry Pi Pico 2, an i2s module with stereo line out and some pots, an encoder and a button.
Check out my unfinished (but already fun) prototype here:
https://v.basspistol.org/w/pS4PrN9Wjo5eFP4hqFSpYr
NB: the case was a charity shop find.
The new audio effects libraries in CircuitPython are super fun. Here's a quick "taster" showing off some of them, part of my impending "Synthio Tutorial". Thanks Mark & Cooper for making them!
https://www.youtube.com/watch?v=nyv7XlQ1d00
#CircuitPython #synthio #audioeffects #synthdiy
If any Boston-area #CircuitPython friends would like to come out to Boston College Arts Fest, Sat. April 26, my students are presenting 1-3pm both Physical Computing & #SwiftUI projects in the new MakerSpace building 245 Beacon St. Room 301. No pressure, but would love to see you there if interested & able! @blitzcitydiy @ecken @danhalbert. All welcome! https://www.bc.edu/content/bc-web/sites/bc-news/articles/2025/spring/arts-festival-2025.html
