#rp2040 — Public Fediverse posts

A Thoroughly Modern Minimalist Transceiver

https://fed.brid.gy/r/https://hackaday.com/2026/09/03/a-thoroughly-modern-minimalist-transceiver/

A Thoroughly Modern Minimalist Transceiver

https://fed.brid.gy/r/https://hackaday.com/2026/09/03/a-thoroughly-modern-minimalist-transceiver/

A Thoroughly Modern Minimalist Transceiver

https://fed.brid.gy/r/https://hackaday.com/2026/09/03/a-thoroughly-modern-minimalist-transceiver/

Погружение в создание приставки для Microsoft MakeCode Arcade

В прошлой статье я рассказывал, как делал Arduboy WOW с применением модулей, но помимо Arduboy мне еще почти также сильно интересовала платформа Microsoft MakeCode Arcade и мне захотелось повторить тоже самое, но с ней. Правда пока я решил ограничиться созданием устройства на макетной плате, чтобы подробнее изучить эту платформу и не отвлекаться на остальное. (Или в будущем сделаю на этой базе полноценную приставку и напишу еще одну статью.) MakeCode Arcade очень сильно отличается от Arduboy, но в то же время они в сущности обо одном. В двух словах, MakeCode Arcade это не одна приставка, а несколько десятков приставок, игры для которых пишутся в своем редакторе, в браузере. В этой статье я постараюсь рассказать как эта система работает изнутри или как у них получилось сделать столь заманчивую идею реальностью на примере моего устройства на макетной плате, которое я назвал MakeCode Arcade Beast.

https://habr.com/ru/articles/1056210/

#makecode #arcade #ретроконсоли #arduboy #схемотехника #rp2040 #stm32 #diyприставки #сезон_DIY_и_IT

Awesome idea: use Pi Pico as USB sound card + DSP! Equalizer, crossover, room compensation, etc.
License: GPL v3.

https://hackaday.com/2026/04/29/digital-signal-processing-on-the-pi-pico/

#rp2040, #rp2350, #pipico

RE: https://oldbytes.space/@thelastpsion/116345290344668595

And the results are in!

1. Pico C
2. Rust
3. Free Pascal
4. Joint with Pico C++, MicroZig and Yarg.

So, what am I going to do? Well, I'm leaning towards porting the existing Arduino C code to the Pico C SDK. I'm currently using one class for encapsulation and abstraction, but I could replace that with structs and static functions. I'm not a great C programmer, but I'm pretty comfortable with it, so it makes sense

However, before I do that, I see a bigger challenge of getting a good setup without using VS Code. I've been using #NeoVim for a while now, and I'd like to get a comfortable setup using that on #Linux.

So, I'm going to try to build Blinky projects for at least Pico C, Rust and Free Pascal, using Linux and NeoVim. Hopefully this will give me a better feel for how well these languages actually suit me. I've never done any Rust before, either, so that's going to be quite the learning curve!

If I have time, I'm going to give Yarg a go, too, because I think the premise is really cool. If I'm on a roll, I'll try #MicroZig too.

And if I really feel like I have the capacity, I'll port the code to one of these other languages.

I'm acutely aware of all the other projects I've given myself to do, such as the SIBO SDK and other small Psion-related projects, not to mention $dayjob and $reallife. So we'll see how things go!

#Pascal #FreePascal #ObjectPascal #RustLang #YargLang #RaspberryPiPico #PiPico #PiPico2 #RP2040 #RP2350

RE: https://oldbytes.space/@thelastpsion/116345290344668595

Only a couple of hours left for this poll.

C is clearly out in front for my embedded project, but Rust and Pascal aren't far behind!

#RaspberryPiPico #PiPico2 #PiPico #RP2040 #RP2350

Poll for a bit of fun. Feel free to boost!

I've got a #RaspberryPiPico project written in #Arduino C. It talks to a Psion SSD and dumps the contents over USB serial. It can (theoretically) act as a full controller to tag an SSD, too.

I feel like I should port it to the proper Pico SDK. But I also know there are other options. And I'm intrigued to know what Fedi would do.

What should I rewrite this firmware in?

#RP2040 #RP2350 #PiPico #PiPico2

Artikel-Update:

I2C-#Sensoren am #Elecrow #LoRaWAN #LR1262 Dev.-Board mit #Raspi-Pico 2040

ergänzt: Sensoren #BME280 und #BME680

--> https://cool-web.de/raspberry/elecrow-rp2040-sx1262-lorawan-development-board-i2c-sensors-bmp280.htm

#LoRa #Bosch #Sensortec #BMP280 #RaspberryPi #Raspi #PiPico #RP2040 #Elektronik #Maker #DIY #Microcontroller #Elecrow

Made some progress on prototyping a #RP2040 based #USB Audio interface. I got a PIO program to output a good looking TDM signal for 4 channels of 32-bit samples.

Now I can start prototyping the receiving end of the transaction, DMAing samples into RAM and packing them into isochronous USB packets.

#Hardware #PiPico #RaspberryPi #EmbeddedC #Audio #Microcontroller

I am slowly getting better at soldering, 4 out of 7 successful #MechanicalKeyboard PCBs now - all three of my diode-free #GraphTheory wired keyboard PCB designs have worked (eventually) ⌨️🎊

1️⃣ #RaspberryPiPico #RP2040 ‘Gamma Omega TC36K’ (USB only) http://astrobeano.blogspot.com/2025/08/my-first-self-built-computer-keyboard.html

2️⃣ #ProMicro #nRF52840 BLE ‘Gamma Omega Hesse’ https://astrobeano.blogspot.com/2025/10/hesse-diode-free-bluetooth-keyboard.html

3️⃣ #SeeedStudio #Xiao #SplitKeyboard BLE split Forager ‘Acid’ http://astrobeano.blogspot.com/2025/10/partial-heawood-forager-keyboard.html

#ErgoMechKeyboard #ErgonomicKeyboard

Let's go 👌

#RaspberryPi #PiPico #rp2040

(Neural) Networking with a Business Card https://hackaday.com/2025/11/15/neural-networking-with-a-business-card/ #circuitboardbusinesscard #ArtificialIntelligence #speechrecognition #voicerecognition #businesscard #PCBHacks #rp2040

My current success rate with #MechanicalKeyboard PCB soldering is currently only 2 out of 5, well 40% is a pass mark - just.

The #RaspberryPiPico #RP2040 ‘Gamma Omega TC36K’ board worked (an easy build, could probably have socketed it). 💚

One success, one failure with #SeeedStudio #Xiao BLE castellated in Forager ‘Acid’ PCB (some fiddly back pads). 🧡

Two failures with #ProMicro #nRF52840 BLE in ‘Gamma Omega Hesse’ board attempting faux-castellation💔

Just as well custom PCBs are fabricated in batches of five - waiting on spare parts to try again - #LearningByDoing or #LearningByFailing ?

A new pedal for a friend, this one is just an elementary #MIDI controller. It alternatively sends Start and Stop messages when the footswitch is pressed so he can run his #MPC with it.

The microcontroller is an #RP2040 from a Seeed #Xiao board. For this project I had all the parts in stock excepted the MIDI socket and the 1590B enclosure. The circuit was simple enough to be implemented on a stripboard (with SMD ferrite beads on the copper side).

Edit: I also had to bend the top of the poor LM7805 regulator to make it fit into the enclosure. 😅

#electronics #stompbox #audio

Particle Physics on a Small, Affordable PCB https://hackaday.com/2024/07/13/particle-physics-on-a-small-affordable-pcb/ #particledetector #betaparticles #betaradiation #semiconductor #photodiode #amplifier #Science #rp2040

Particle Physics on a Small, Affordable PCB - Experimenting in the world of particle physics probably brings to mind large, expe... - https://hackaday.com/2024/07/13/particle-physics-on-a-small-affordable-pcb/ #particledetector #betaparticles #betaradiation #semiconductor #photodiode #amplifier #science #rp2040

aspberry Pi: Compute Module 5 ist fertig, RP2040-Nachfolger in 2024? #RPi #RaspberryPi #RP2040 #ComputeModule5 #EbenUpton #Mikrocontroller #RPi5 https://winfuture.de/news,139844.html?utm_source=Mastodon&utm_medium=ManualStatus&utm_campaign=SocialMedia

2023 Halloween Hackfest: Candy Basket Sees You Coming - On Halloween, some people can’t or don’t want to open the door for various reasons... - https://hackaday.com/2023/10/14/2023-halloween-hackfest-candy-basket-sees-you-coming/ #halloweencandy #holidayhacks #raspberrypi #halloween #contests #rp2040 #candy

Arduino Audio and MIDI Frameworks

I’ve been collecting bookmarks for interesting Arduino audio projects for a while now, and having now played with the XIAO SAMD21 I started looking back over my list for other things to try.  One thing that occurred to me is that there are a now a number of more powerful audio frameworks available for a range of microcontrollers, so in this post I’m doing an introductory “look see” at some of them, largely as “notes to self” to come back to them for some more detailed projects in the future.

Note: Many of these require a 32-bit processor, which is one of the reasons I’ve not looked at them so far.

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.

Mozzi

I’ve spent quite a bit of time with Mozzi of course, the synthesis library for Arduino that supports a large range of microcontrollers, including the “original” 8-bit Arduino ATmega328P, so I won’t go over that again here.

For a starting point with Mozzi, see: Arduino PWM MIDI Synthesis with Mozzi.  For using Mozzi on a 32-bit SAMD processor, there is more here and here.

But Mozzi isn’t the only game in town, especially if we’re expanding out to 32-bit microcontrollers.

The Arduino Sound Library

https://www.arduino.cc/reference/en/libraries/arduinosound/

This is an official Arduino library that supports SAMD21 based microcontrollers using an I2S digital to analog converter. It is designed for the MKR series of official Arduino boards.

Interestingly it appears to only support I2S audio devices for sound input and output.  That seems like a little bit of a missed opportunity to me in that the SAMD21 has a built-in DAC, but I guess analogWrite() deals with access to the DAC relatively easily.

It is designed for official Arduino SAMD architecture boards – so those in the MKR series.  It might work on other SAMD architecture boards, I haven’t looked into it in detail.

Phil Schatzmann’s Arduino Audio Tools

https://github.com/pschatzmann/arduino-audio-tools

This is a suite of open source code for audio stream processing, providing a range of audio sources (e.g. microphones, Internet streams, files, sensors, and so on) and sinks (e.g. DACs, PWM audio, MP3, codecs, audio modules, etc).

It can be used to build audio players, processors, effects, file processors, audio visualisers, networked audio tools, and so on.

I believe it supports the following microcontroller architectures:

• ESP32 (S and C variants)
• ESP8266
• RP2040 (MBED and non-MBED)
• AVR
• STM32
• SAMD

It supports several audio output boards too, including: ESP32-A1S based boards (ES8388 or AC101 codecs); VS1053 modules; and WM8960 modules.

I believe this is a library for audio processing, not necessarily audio synthesis.

Marcel Licence’s ML Synth Tools

https://github.com/marcel-licence/ML_SynthTools

This is a comprehensive synth library for producing synthesizers, organs and effects.  Most of the code is open source, but there are certain key elements that are provided only in pre-built library form.

It provides libraries for the following microcontrollers:

• ESP32
• ESP8266
• XIAO SAMD21
• Teensy 4.1
• Daisy Seed
• Raspberry Pi Pico RP2040
• STM32F407

As well as the synthesizer core oscillators there are modules for arpeggiators, effects, meters, scopes, and MIDI file playing.  Here are some example builds using the library:

• ML Organ (all platforms): https://github.com/marcel-licence/ml_synth_organ_example
• SAMD21 Synth: https://github.com/marcel-licence/samd21_mini_synth
• ML Synth (all platforms): https://github.com/marcel-licence/ml_synth_basic_example
• ESP32 FM synth: https://github.com/marcel-licence/esp32_fm_synth
• ESP32/RP2040 e-piano: https://github.com/marcel-licence/ml_epiano_example

Although it isn’t fully open source, this non-the-less looks like it would be worth taking a more detailed look.  The provided videos of Marcel playing are particularly excellent.

MIDI Controller Libraries

There are a number of Arduino libraries for building MIDI controllers. Here are a selection of some that I’ve found so far.

OpenDesk MIDI Platform – https://github.com/shanteacontrols/OpenDeck

This is a set of firmware and two official PCB designs for MIDI controllers. In addition to the official boards, it also supports many microcontrollers, including:

• Arduino Mega 2560
• Arduino Nano 33 BLE
• Raspberry Pi Pico
• XIAO RP2040
• Teensy++ 2.0

And many others. It includes a web-based configuration utility for defining the MIDI commands for the controls.  Official boards are available on Tindie and you can read more about them here: https://shanteacontrols.com/.

It supports a range of buttons, encoders, potentiometers, force sensitive resistors, certain touchscreens and can provided feedback using LEDs and displays.

Control Surface – https://github.com/tttapa/Control-Surface

This is a general purpose library for building MIDI input and output control devices.  It supports a wide range of microcontrollers, including:

• AVR (Uno, Mega, Leonardo).
• Arduino Nano Every and 33.
• Teensy.
• ESP8266
• ESP32
• Raspberry Pi Pico

It supports a range of MIDI transports, including serial, USB, “direct serial” (using Hairless MIDI) and MIDI BLE. It also supports a range of buttons, potentiometers, rotary encoders, switches, keyboard matrices, and so on and can provide visual feedback using a range of LEDS and displays.  It has built-in support for multiplexers, shift registers and LED drivers.

It includes a huge number of example projects to browse.

MIDIPal – https://github.com/pichenettes/midipal

This is a “MIDI Swiss Army Knife” that, with the additional of a display and rotary encoder, can provide a wide range of MIDI processing functions.  It includes an editor application for programming MIDI filters.

This is a “native” AVR application, not for the Arduino environment.

Notes and Volts MIDI Controller – https://www.notesandvolts.com/2016/04/arduino-midi-controller-buttons.html

This is provided for completeness as it is a fairly common codebase for people to find and use with an Arduino. It supports a range of potentiometers and buttons and makes the task of configuring them as a MIDI control device relatively straight forward.

Closing Thoughts

As I say, this post is really almost a bit of a “to-do list” of things that look interesting and that I might try to take a more detailed look at, at some point.

If you have experience of any of these frameworks or libraries; or have suggestions of others that might be worth a look, do let me know in the comments!

Kevin