EuroPi
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| EuroPi | pico-balls | |
|---|---|---|
| 34 | 1 | |
| 390 | 4 | |
| 4.6% | - | |
| 8.7 | 10.0 | |
| 16 days ago | over 1 year ago | |
| Python | Python | |
| Creative Commons Zero v1.0 Universal | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
EuroPi
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Using a Raspberry Pi Pico as a cheap multi-channel DAC for pitch CV
Hi all, I'm making a Eurorack sequencer module with 4 pitch CV outputs (NOT audio) and I've noticed that DACs are kind of a pain due to being expensive, SMT-only & still requiring buffering with op amps. I figure that a good alternative would be to buy a Raspberry Pi Pico for $4 which will give me 8 PWM outputs that I would then hook up to an output stage like the one in the europi (shown here: https://github.com/Allen-Synthesis/EuroPi/blob/main/hardware/EuroPi/schematic/europi_schematic.pdf)
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What is your favorite open source eurorack module? And the best documented?
Bom has links for sourcing parts
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Is it really necessary to put opamps in front of my ADC inputs?
Up until now I've been using the analog input stage from the EuroPi schematic as my model for a CV in. You can see it here:
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Easiest/cheapest way to get multiple (9-12) analog cv outputs (0-5V volt) from a single microcontroller/arduino
There is no super cheap way to get a lot of analog outputs from an MCU. Filtered PWM is your best bet for cost effectiveness (I recommend looking at the EuroPi from allen synthesis : https://github.com/Allen-Synthesis/EuroPi). Otherwise if PWM doesn't work for you, you'll need to look into DAC chips. The MCP4728 is a good spot to start, it's 12-bit and has 4 channels: https://www.adafruit.com/product/4470. Since it's I2C controlled you can have multiple of them on one bus. Maybe looking into a 16 channel PWM driver for a lot of outputs: https://www.adafruit.com/product/815. Hope this helps!
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My Raspberry Pi Pico based Eurorack module has a new software release!
The project is completely open-source and open hardware, and the contributors together have made this big list of scripts that you can run using a menu system!
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My reprogrammable DIY module (EuroPi) has just had a new free software release!
The project is entirely open-source but I do also sell the Panel+PCBs on my site!
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Best microcontroller for DIY modules?
Check out the EuroPi project https://github.com/Allen-Synthesis/EuroPi
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Firmware hacking with Uncertainty
EuroPi Turing Machine script is feeding the Uncertainty cv input with pulse 1 opening an envelope on Maths for voice 1 & 2, pulse 2 opens the second Maths envelope for sub osc voice 3. A little delay added for texture. That's pretty much it!
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Hardware List
EuroPi - A reprogrammable Eurorack module based on the Raspberry Pi Pico
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A Question, for anyone that knows how MI firmware code works
The patch.init() is still a great way to start, but you could save some money ditching the audio i/o and build yourself an EuroPi. However, that requires DIY, obviously.
pico-balls
What are some alternatives?
typhoon-manual - Manual / Cheatsheet for Typhoon module
documentation - The official documentation for Raspberry Pi computers and microcontrollers
MicroPython - MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems
seruro - Turn your Raspberry Pi Pico into a crypto hardware wallet
thonny - Python IDE for beginners
pico-rubberducky - raspberry pi pico/w based rubber ducky. Also included some libs for esp8266 for wireless injection.
squares-and-circles - squares-and-circles is an alternate firmware for the Eurorack module O_C, targeting Teensy 4.
UnicornClock - A Python clock designed to run on a Pimoroni GalacticUnicorn.
Apeks - 12-bit through-hole adaptation of Mutable Instruments Peaks
buzzer_music - RPI Pico / Micropython library to play music through one or more buzzers, can automatically replace chords with fast arpeggios to simulate polyphony with a single buzzer. Music can be easily taken from onlinesequencer.net
TuringMachine - Turing Machine Mk 2 Main Module
liquid-crystal-pico - MicroPython package for HD44780 LCDs