My Teensy-based Game Boy sync (more information here) has been updated with support for DIN sync 24. Additionally, the code has been cleaned up a little bit to make it slightly more readable.
- Pin 2 is the sync 24 pulse output, at 24 pulses per quarter note and with a duty cycle of 3 milliseconds (regardless of the BPM)
- Pin 3 is the sync 24 stop / start pin, which outputs 5V when playing and 0V when stopped
Source code is here (for those wanting to edit).
HEX file is here (for those wanting to upload to Teensy straight away).