“circuitpython” — Fediverse search results on home.social

gallaugher @[email protected] · 2025-10-10 · 18:30 UTC

Use a Raspberry Pi Pico W (orig. or 2W) and setup a web page with a toggle to turn NeoPixel lights on and off. MQTT has never been easier to use. CircuitPython and free Adafruit.io makes it happen! An updated lesson I use in my PhysicalComputing course. Hack on! #csed
https://youtu.be/iFwvvEJ_UwA

#csed

adafruit @adafruit · 2025-10-09 · 14:26 UTC

"ai powered" outdoor e-ink display showing finance news for makers, layoff tracker, 3i/atlas tracker (hah!), all using a @particle #tachyon which is kinda funny as it's a @Qualcomm #dragonwing ... using CircuitPython ... (Tachyon 5G Single-Board Computer - https://store.particle.io/collections/all-products/products/tachyon-5g-single-board-computer?variant=43311822733381

#tachyon #dragonwing

Olimex @[email protected] · 2025-09-22 · 12:52 UTC

New Open Source Hardware board in stock: RP2350-PICO2-BB48 exposes all 48 GPIOs in a breadboard friendly layout https://olimex.wordpress.com/2025/09/22/new-rp2350-pico2-open-source-hardware-development-board-with-all-48-gpios-exposed-in-breadboard-friendly-layout/ #raspberrypi #pico #pico2 #micropython #circuitpython

#raspberrypi #pico #pico2 #micropython #circuitpython

Trumtins Electro Shark 325ppm @[email protected] · 2025-08-05 · 15:32 UTC

To be honest: This should be known by people who decide to fire their employees in order to replace them with a stinkin' ai.
I tried CircuitPython for the first time 4 days ago.
asked chettgibbiddy to search and find me all discussions and solutions others have found in the context of a specific waveshare devboard and its programming in CP. You know? Trying to get to know the enemy...
Very patiently I tried to commandeer the confused little buddy through many different ptifalls and traps where it simply assumed instead of search, didn't know sh@t and so on.
I gave it up after _several_ hours with the words "I will stick with C, this doesn't make sense"
Today – again curious – I asked Jibbiddy what it knows about me.
And guess what?
It only remembers stuff, when I explicitly ask it to do so. (What I never did, bzw.)
OR if it by itself somehow "thinks" some things are noteworthy to remember about me...
See here the concluding back and forth:

Seriously? That's why the C-Class of business clowns "love them me ai and then some" so much. Finally the subserviant lower class to talk down at...
#ai #AINeedsRegulation
AIs have to become a thing that is solely controlled and watched over by we the people. #Capitalism needs to be pushed back – or better: #obliterated

#ai #aineedsregulation #capitalism #obliterated

Andy Warburton ❌❌❌ @[email protected] · 2025-06-09 · 12:53 UTC

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!)

#olkb #splitkeyboard #ergokeyboard #mechanicalkeyboard #pipico #picow #raspberrypi #handwiredkeyboard

#3dprinted #keyboard #kmk #circuitpython #olkb #splitkeyboard

Andy Warburton ❌❌❌ @[email protected] · 2025-05-25 · 19:58 UTC

Finished my new keyboard! it’s an evolution of my old keyboard with some function keys and media keys moved to the top right so I stop pressing mute instead of ctrl! It is a little taller than I like but the design I layered so I think I can shave off at least 5mm without too much hassle (probably more!)

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear #ortholinearkeyboard #joescotto #circuitpython #kmk #mechanicalkeyboard #mechanicalkeyboards #polymaker #prusament

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear

Andy Warburton ❌❌❌ @[email protected] · 2025-05-25 · 19:58 UTC

Finished my new keyboard! it’s an evolution of my old keyboard with some function keys and media keys moved to the top right so I stop pressing mute instead of ctrl! It is a little taller than I like but the design I layered so I think I can shave off at least 5mm without too much hassle (probably more!)

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear #ortholinearkeyboard #joescotto #circuitpython #kmk #mechanicalkeyboard #mechanicalkeyboards #polymaker #prusament

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear

Andy Warburton ❌❌❌ @[email protected] · 2025-05-25 · 19:58 UTC

Finished my new keyboard! it’s an evolution of my old keyboard with some function keys and media keys moved to the top right so I stop pressing mute instead of ctrl! It is a little taller than I like but the design I layered so I think I can shave off at least 5mm without too much hassle (probably more!)

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear #ortholinearkeyboard #joescotto #circuitpython #kmk #mechanicalkeyboard #mechanicalkeyboards #polymaker #prusament

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear

Andy Warburton ❌❌❌ @[email protected] · 2025-05-25 · 19:58 UTC

Finished my new keyboard! it’s an evolution of my old keyboard with some function keys and media keys moved to the top right so I stop pressing mute instead of ctrl! It is a little taller than I like but the design I layered so I think I can shave off at least 5mm without too much hassle (probably more!)

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear #ortholinearkeyboard #joescotto #circuitpython #kmk #mechanicalkeyboard #mechanicalkeyboards #polymaker #prusament

#prusament #polymaker #mechanicalkeyboards #mechanicalkeyboard #kmk #circuitpython

Andy Warburton ❌❌❌ @[email protected] · 2025-05-25 · 19:58 UTC

Finished my new keyboard! it’s an evolution of my old keyboard with some function keys and media keys moved to the top right so I stop pressing mute instead of ctrl! It is a little taller than I like but the design I layered so I think I can shave off at least 5mm without too much hassle (probably more!)

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear #ortholinearkeyboard #joescotto #circuitpython #kmk #mechanicalkeyboard #mechanicalkeyboards #polymaker #prusament

#3dprinted #3dprinting #olkb #handwired #handwiredkeyboard #ortholinear

Simple DIY Electronic Music Projects @[email protected] · 2025-04-04 · 10:41 UTC

Forbidden Planet “Krell” Display – MIDI CC Controller – Part 2

This revisits my Forbidden Planet “Krell” Display – MIDI CC Controller using my Forbidden Planet “Krell” Display PCB with a Waveshare RP2040 to create more of a “all in one” device.

Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments!

If you are new to Arduino, see the Getting Started pages.

Parts list

Updated Forbidden Planet “Krell” Display (see below).
Completed Forbidden Planet “Krell” Display PCB Build
Waveshare Zero format device (I’m using an RP2040)
4x 6mm brass spacers
4x 20mm nylon spacers

PCB

This requires a built of the Forbidden Planet “Krell” Display PCB with the following:

2 potentiometers
MIDI IN and OUT

I’ve used potentiometers that are their own knob, as they only poke through the casing by around 5mm or so.

If it you are able to get longer shaft pots, then that would probably be worthwhile.

Updated 3D Printed Case

This requires the following from the Krell Display 3D Printed Case:

1x Frame
2x Inserts (with potentiometer holes)
1x EuroRack support

This requires the following options in the OpenSCAD code:

show_frame = 1;
show_quadframe = 0;
show_insert = 1;
show_support = 0;
show_quadsupport = 0;
show_eurorack = 0;
show_eurorack_support = 1;

alg_pot1 = 1;
alg_pot2 = 1;
alg_cv   = 0;

The frame does not really take into account the PCB at present, but I’ve reached the “good enough I want to do something else” stage, so I’ve just added a couple of small cut-outs (using a hacksaw) for the two MIDI sockets, and am content that the components stick out a bit from the back.

This cutout has to be 10.5mm from the end, 6mm wide, and 5mm deep.

At some point I might go back and design a deeper frame that has the cut-outs included and some kind of snap-on back to make it a self-contained box.

But for now, this is left as an exercise for, well, anyone else 🙂

Construction

I’ve used four brass 6mm spacers to screw into the mounting holes in the frame. Then the PCB can be inserted, taking care to squeeze in the 3D printed support around the LEDs and pots, and fixed with 20mm spacers which will also act as “legs”.

The Code

I’ve used a Waveshare Zero RP2040 and Circuitpython for this build. This is a combination of some of the test code used for the Forbidden Planet “Krell” Display PCB but with added MIDI.

The code supports both Serial and USB MIDI.

I wanted an equivalent of the Arduino map() and constrain() functions and didn’t immediate spot them in Circuitpython so wrote my own:

def algmap(val, minin, maxin, minout, maxout):
    if (val < minin):
        val = minin
    if (val > maxin):
        val = maxin
    return minout + (((val - minin) * (maxout - minout)) / (maxin - minin))

This allows me to map the analog read values (0 to 65535) down to MIDI CC values (0 to 127) whilst also allowing for some inaccuracies (I’ve treated anything below 256 as zero for example):

alg1cc = int(algmap(alg1_in.value,256,65530,0,127))

I’ve used the Adafruit MIDI library, which I’m still not really a fan of, but I wanted to include MIDI THRU functionality to allow the controller to sit inline with an existing MIDI stream. But it doesn’t seem to work very well.

I was already only updating the LEDs/MIDI CC if the pot values had changed, to cut down on the number of Neopixel writes required.

I experimented with changing the scheduling of the analog reads and MIDI but that didn’t seem to help very much. In the end I made sure that all MIDI messages queued up in the system would be read at the same time before going back to checking the pots.

    msg = midiuart.receive()
    while (msg is not None):
        if (not isinstance(msg, MIDIUnknownEvent)):
            midiuart.send(msg)
        msg = midiuart.receive()

It will do for now. Moving forward, I might try the Winterbloom SmolMIDI library. If that still doesn’t give me some useful performance then I might have to switch over to Arduino C.

Find it on GitHub here.

Closing Thoughts

The MIDI throughput is disappointing, but then I’ve never really gotten on with the Adafruit MIDI library. I use it as USB MIDI on Circuitpython is so easy, so will need to do something about that.

I’m still deciding on the PCB-sized supports too. The original seemed to have nicer diffusion of the LEDs, but that could have been the difference between 5mm SMT neopixels and these THT APA106s which seem more directional in the first place.

And I really ought to finish the 3D printed case properly too.

So this is “that will do” for now, but I ought to come back and finish it off properly at some point.

Kevin

#APA106 #circuitpython #ForbiddenPlanet #Krell #midi #midiController #NeoPixel #potentiometer #rp2040 #WaveshareZero

#wavesharezero #rp2040 #potentiometer #neopixel #midicontroller #midi

Simple DIY Electronic Music Projects @[email protected] · 2025-04-03 · 15:10 UTC

Forbidden Planet “Krell” Display EuroRack Module

This project uses my Forbidden Planet “Krell” Display and the Forbidden Planet “Krell” Display PCB Design but with some slight variations that means it could be EuroRack mounted with a control voltage (CV) input.

This is a DIY module only for use in my own DIY system.

Do NOT use this alongside expensive modules in an expensive rack. It is highly likely to cause problems with your power supply and could even damage your other modules.

https://makertube.net/w/qJqgTxxsEznTuF2DRVZT9o

Warning! I strongly recommend using old or second hand equipment for your experiments. I am not responsible for any damage to expensive instruments!

If you are new to microcontrollers, see the Getting Started pages.

Parts list

3D Printed EuroRack format Krell Display unit.
Waveshare Zero format board – details here.
Forbidden Planet “Krell” Display PCB built for EuroRack use (see below).
Additional companion EuroRack power PCB (see below).

EuroRack 3D Print Design

This is an evolution of my original Forbidden Planet “Krell” Display box, but fitting into EuroRack dimensions: 128.5 x 60, which essentially makes it a 12 HP module.

It still takes the same inserts however, but now also includes options for holes for jack sockets or potentiometers:

show_eurorack = 1;
show_eurorack_support = 1;

alg_pot1 = 1;
alg_pot2 = 1;
alg_cv   = 0;

I’ve also included a special “supports” option for use with the PCB and the EuroRack case.

Krell Display PCB – EuroRack Build

To build one of my Forbidden Planet “Krell” Display PCB Designs for use with a EuroRack, follow the previous Build Guide but note the following differences:

The MIDI circuits are not required when used as a CV input device.
The lower potentiometer should be replaced with a CV input circuit.
The upper potentiometer is optional, but I’m omitting it for my build.
Power will come via the 5V jumper headers from an additional EuroRack power PCB (details below).
Low-profile (e.g. 9mm high in total) headers should be used for the Waveshare Zero, but once again note the errata about the footprint on the PCB being too wide.

Here are some build photos of a build for EuroRack use. For this build there are only two diodes (the two BAT43) and two resistors (22K and 33K). Also note that none of the 100nF ceramic capacitors are required either.

Both electrolytic capacitors have been soldered into position on their sides as show below.

The Thonkiconn style mono jack shares the footprint are of the lower potentiometer on the LED side of the board, but be sure to get use the correct mounting holes as shown by the orientation below.

Nothing has been soldered to the power jumper yet. See the discussion below for how to link this to the power board.

Krell Display Companion EuroRack Power PCB

Bill of Materials:

Waveshare Zero “Krell” Display EuroRack power PCB (Github Link below).
L7805 TO-220 format regulator or equivalent (see discussion below).
1x 16-way DIP EuroRack shrouded header.
1x 1N5017 Zener diode.
2x 47uF electrolytic capacitors.
1x 100nF ceramic capacitor.
2-way Jumper header socket and pins (probably need extended pins – see discussion).

I’ve opted to use a DC-DC converter with a 7805 physical footprint as shown below.

If a 7805 regulator is used then a heatsink will almost certainly be required. I’ve oriented the regular to allow for a “tab up” mounting which hopefully leaves plenty of room for some kind of heatsink to be used.

Here are some build photos.

There is an option on the PCB to install a 10R resistor as is sometimes recommended for EuroRack modules. From what I’ve read this seems to be to allow it to act as a “fuse” in the case of an incorrectly wired module. As I’ve discussed before (see here) I’m not sure this is so relevant for me, so I’m using the provided solder bypass bridge to leave it out.

Note the orientation of the DC-DC converter.

I’ve used extended pin headers for the power link between the two boards, but due to an error in positioning, they’ve had to be bent over slightly – more on that later.

Physical Build

A completed unit has the following parts:

3D printed case, PCB supports, and two “krell” inserts.
Main PCB built for EuroRack use as described above.
Power PCB as described above.
M2.5 spacers and fixings as follows:
- 4x 6mm M2.5 brass fixings.
- 4x 15mm M2.5 nylon fixings.
- 4x M2.5 nylon screws.

The power link between the two PCBs has to be trimmed and slightly bent as shown below.

Once the whole thing is put together, there isn’t room, at least on my build, for the nut to be put on the jack socket. Also, the 6mm and 15mm spacers might be slightly too short, depending on how far off the PCBs the LEDs ended up. Some experimentation and “encouragement” is probably required to get everything together.

The Code

The code is relatively straight forward, and is largely a mix of the analog and neopixel test code from the Forbidden Planet “Krell” Display PCB Build Guide.

One quirk is scaling the analog read from 0..65535 to a useful 0-10 to allow for zero to 10 leds to light up. I’ve allowed for a range of values to be “basically zero” too to allow for some jitter or noise.

As I only write out to the neopixels when something changes, this code seems to be quite responsive.

This requires the following Adafruit Circuitpython Library Bundle libraries:

neopixel.mpy
adafruit_pioasm.mpy
adafruit_pixelbuf.mpy

In fact, the entire Circuitpython code is given below.

import time
import board
import neopixel
from analogio import AnalogIn

cv_in = AnalogIn(board.A3)

pixel_pin1 = board.GP2
pixel_pin2 = board.GP3
num_pixels = 5

pixels1 = neopixel.NeoPixel(pixel_pin1, num_pixels, brightness=0.3, auto_write=False, pixel_order=neopixel.RGB)
pixels2 = neopixel.NeoPixel(pixel_pin2, num_pixels, brightness=0.3, auto_write=False, pixel_order=neopixel.RGB)

col = (80, 35, 0)

lastcv = -1
while True:
    cv = cv_in.value / 256

    if (lastcv != cv):
        lastcv = cv
        led = cv / 25
        for pix in range(5):
            if (pix < led and cv > 5):
                pixels1[pix] = col
            else:
                pixels1[pix] = 0
                
            if (pix+5 < led and cv > 5):
                pixels2[pix] = col
            else:
                pixels2[pix] = 0
            
            pixels1.show()
            pixels2.show()

GiHub Resources

There is now an updated version of the OpenSCAD code for the case on GitHub and the PCB and code are also now available.

Closing Thoughts

This isn’t a perfect build in mechanical terms, but I’m not sure I ever do anything perfectly anyway, especially where mechanical things are concerned, but the final result is pretty pleasing.

The video shows it running with a Pimoroni RP2040 in the driving seat. First a potentiometer provides a 0 to 5V input, then I’m using my Educational DIY Synth Thing‘s LFO to provide a 0 to 3V3 input.

Kevin

#circuitpython #EuroRack #Krell #NeoPixel #potentiometer

#potentiometer #neopixel #krell #eurorack #circuitpython

Andy Warburton ❌❌❌ @[email protected] · 2025-03-24 · 23:00 UTC

And just like that we have a functioning clock! currently running on a propmaker RP2040 but I will probably have to move over to something WiFi enabled before long #pcb #electronics #maker #RP2040 #RaspberryPi #jlcpcb #circuitpython @adafruit #1segrgb

#pcb #electronics #maker #rp2040 #raspberrypi #jlcpcb

Chris Burton @[email protected] · 2025-03-24 · 14:43 UTC

@rpimag I did a bit more work on my UART booting Flashless Picos. On the end of each "pico" there's an I2C port for the I/O expander (used to reset/setup the RP2350A to boot from UART) and a UART port to send the bin file/communicate after boot. The Pico2 in the PicoUART6 is running CircuitPython using Adafruit_CircuitPython_PIO_UART for the non-hardware UARTs.

#MakerMonday #Pico #Pico2 #RP2350 #RP2350A #PicoUART6 #CircuitPython

#makermonday #pico #pico2 #rp2350 #rp2350a #picouart6

Open Source Electronics Wiki @[email protected] · 2024-11-15 · 10:46 UTC

My new #Introduction

I am building tiny real-time #Forth co-processors for MicroPython, Circuit Python and RISC-V. On FPGA's a stack machine can be 1/2 the size of a 32 bit RISC-V soft core.

#Forth, #MicroPython #CircuitPython #Riscv #StackMachine #FPGA #Verilog
#realtime

#introduction #forth #micropython #circuitpython #riscv #stackmachine

Ralph is verhuisd @[email protected] · 2024-10-11 · 15:10 UTC

@adafruit products are really great. Only downside with my current project is that I can't find any documentation on how to use #Bluetooth LE on an #ItsyBitsy #nRF52840 Express via #CircuitPython, without the #Bluefruit app, but via Web BLE.

#bluetooth #itsybitsy #nrf52840 #circuitpython #bluefruit

adafruit @[email protected] · 2024-09-18 · 18:43 UTC

It’s like those Pac Man joystick TV games but we are brave enough to do keyboard DOOM!

DoooooOOOOM

https://learn.adafruit.com/doom-keeb?view=all

#adafruit #gamingkeyboard #customkeyboards #keebs #keyboardmod #kb2040 #circuitpython #doomgame #neokey #retrogaming #usbmod #techhack #keyboardhacker #keyboardenthusiast #doombutton #gaminghack #zdgame #hiddenusb #flashstorage #keebcommunity #doom

#adafruit #gamingkeyboard #customkeyboards #keebs #keyboardmod #kb2040

adafruit @[email protected] · 2024-09-18 · 18:43 UTC

It’s like those Pac Man joystick TV games but we are brave enough to do keyboard DOOM!

DoooooOOOOM

https://learn.adafruit.com/doom-keeb?view=all

#adafruit #gamingkeyboard #customkeyboards #keebs #keyboardmod #kb2040 #circuitpython #doomgame #neokey #retrogaming #usbmod #techhack #keyboardhacker #keyboardenthusiast #doombutton #gaminghack #zdgame #hiddenusb #flashstorage #keebcommunity #doom

#adafruit #gamingkeyboard #customkeyboards #keebs #keyboardmod #kb2040

adafruit @[email protected] · 2024-09-18 · 18:43 UTC

It’s like those Pac Man joystick TV games but we are brave enough to do keyboard DOOM!

DoooooOOOOM

https://learn.adafruit.com/doom-keeb?view=all

#adafruit #gamingkeyboard #customkeyboards #keebs #keyboardmod #kb2040 #circuitpython #doomgame #neokey #retrogaming #usbmod #techhack #keyboardhacker #keyboardenthusiast #doombutton #gaminghack #zdgame #hiddenusb #flashstorage #keebcommunity #doom

#adafruit #gamingkeyboard #customkeyboards #keebs #keyboardmod #kb2040

Andy Piper @[email protected] · 2024-08-30 · 21:38 UTC

I’ve had an Adafruit Macropad for a little over 3 years, and while I was working from home at the start of that period it was permanently on, connected to my MacBook Pro on my desktop, with a variety of shortcuts configured for driving different apps that I used day-to-day. My configuration is on GitHub.

More recently, I have not been using it nearly as much.

Last weekend for our Makeroni meetup, I pulled it out of my kit bag and started to tinker some more. I have a variety of additional Qwiic / StemmaQT controls and sensors that I wanted to play with, so I updated to the most recent stable build of CircuitPython and started to have a look at them.

I also noticed that it is a nice size to act as a companion device to the MNT Pocket Reform…

MNT Pocket Reform with the Macropad to one sideMacropad with a slider control attached

I noticed a problem – there was some burn-in on the OLED display where it had been mostly always-on in the past (lesson learned, to manage the screen output more carefully!) – but fortunately, Adafruit have done a lovely job of making that easy to replace. I also think it might be nice to have that screen wedged up at a slight angle to aid readability.

OLED display showing ghostingRibbon connector for the display on the rear of the MacropadReplacement OLED

I have a notion that I can 3D print a case to more-or-less match the look of my Hyper Purple laptop. I don’t have an identical colour of filament, but I do have a range of options. I also ordered a bunch of different knobs for the potentiometer, and some alternate keycaps, so that I can make the look a bit more consistent as well.

A selection of filament colour optionsA close (?) matchSome rotation knob options and keycaps

I don’t have a final case design yet (and I need to spend some time properly learning FreeCAD and/or Fusion360, really), and I also haven’t finished modifying the macros code to match what I’m using on Debian on the Pocket Reform, but this is just some work-in-progress.

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https://andypiper.co.uk/2024/08/30/keypad-hacking/

#Blaugust2024 #100DaysToOffload #3dPrinting #adafruit #circuitpython #hardware #keypad #macropad #maker #mntPocketReform #pocketreform #rp2040 #Technology

#blaugust2024 #100daystooffload #3dprinting #adafruit #circuitpython #hardware

chfkch :nixos: :rust: @[email protected] · 2024-07-31 · 07:46 UTC

I mean, i have been struggling with the tooling for #EmbeddedRust with the #ESP32c6 a bit lately (some of it was #NixOS) mostly to the still fast moving development and changes.
But overall the experience is quite nice compared to #Arduino and #ArduinoIDE.
In regards to tooling i think only #CircuitPython or #MicroPython came close.
I hope that i can get #Embassy working by the end of the week, then i should have a reproducible environment across my devices.
#RustLang #MicroControllers #IOT