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sensorium / Mozzi

sound synthesis library for Arduino
https://sensorium.github.io/Mozzi/
GNU Lesser General Public License v2.1
1.07k stars 186 forks source link

Force PWM mode for power supply on GPIO, or suggest it in documentation #247

Open tfry-git opened 6 months ago

tfry-git commented 6 months ago 
          And, I wanted to add that with Mozzi version 2, PWM output ( custom pin) if I use the second cpu I can use the adafruit libraries and I2C bus for display and muxed input on the RP2040 (a pico). To reduce noise, don't forget:
  pinMode(23, OUTPUT); // thi is to switch to PWM for power to avoid ripple noise
  digitalWrite(23, HIGH);

which keeps the pico from dropping into PFM power saving mode and forces PWM mode. That's quiet. Running from a 3.7 volt lithium with the display active and a simple RC output, it's really nice! I have to see what, if anything is possible with the beloved nano :)

Originally posted by @poetaster in https://github.com/sensorium/Mozzi/issues/209#issuecomment-2040500087