This full schematic is a bit cluttered. The Simplified
Analog Input Schematic is easier to read and understand, and it has
a detailed description of how this circuitry works.
The MIDI Drum Machine, Paul Stoffregen and Rod Seely.
Designed and constructed Fall, 1991. Project status: Complete.
http://www.pjrc.com/tech/midi-drums/sch-ana.html
Last updated: November 28, 2003
-- These drum-machine web pages are still under construction --
Questions, Comments?? <paul@pjrc.com>