Pre-flashed firmware chip for AVR VCOs (version 2)
A pre-flashed firmware IC for the updated version of the AVR VCO - these are 4HP modules with all of the circuitry on a single board.
The principal difference between version 1 and version 2 firmware is that version 2 has fine-tune functionality by default.
The firmware source can be obtained from: https://bitbucket.org/yorkmodular/badtrip-vco/src/master/. The pre-flashed chip is aimed at people who are unable to compile and install their own firmware.
The chip's pinout is:
- RESET (connect to Vcc via a 10k resistor)
- Wave CV (0-5V)
- Pitch CV (0-5V)
- RANGE (+5V VCO, 0V LFO)
- OUTPUT (PWM signal - use RC filter or DAC to get analogue voltage)
- Fine-tune CV (0-5V)
- Vcc (5V max)