Early D2B protocol hacking

This is a small experimental board I built to connect the optical adapter from a CD-changer to a PC so I can control the D2B protocol chip via i2c.

The board had a flat cable connector to the CD- changer board, a small A2D converter with aux-in, some pins for the I2C protocol and a LDO.

Interesting accident I had was that I used solder flux which converted to zinc-oxide over time and shorted some of the PCB traces. It took me quite a while to figure out why the thing would just stop working.