Raspberry Pico Wave Oscillator Projects
K-106 Pico Synth project
A like Juno-106 synth. The circuit is also included.
PWM oscillator project
Sawtooth and square wave are generated with PWM on different pins. The circuit is also included.
PWM with 4 bit R-2R DAC oscillator project
Sawtooth saw is generated with 4 bit R-2R DAC. Signal is smoothed with RC filter. Callback function is called via pin IRQ. Pin IRQ is controlled by pin PWD. The circuit is also included.
4-chanel SPI 12-bit DAC oscillator oscillator project
2x MCP4822 with 4x 12-bit DAC chanel. The circuit is also included.
Frequency Counter and more project
Frequency Counter, MIDI USB and serial, VCO. The circuit is also included.
https://blog.thea.codes/the-design-of-the-juno-dco/
https://electricdruid.net/roland-juno-dcos/
https://github.com/polykit/pico-dco
https://www.electronics-tutorials.ws/combination/r-2r-dac.html