Hi, traced the pedal this morning to make some modifications.
I omitted led part of the switch in the schematic.
Carl Martin DC Drive [schematic]
- EddieTavares
- Breadboard Brother
CM has made a lots of drive pedals based on the same circuit such as Hot Drive'n boost, plexitone, ac-tone and others. Something new (almost new) is the way that they found to create negative voltage source with a cheap flip flop NE555.
But I have used both ICL7660 and 555 in some of my diy pedals, I have never get away a little noise when I tried tu use them in drive circuits.
But I have used both ICL7660 and 555 in some of my diy pedals, I have never get away a little noise when I tried tu use them in drive circuits.