DBop Drum Machine Schematics
All
Sequencer
Straight out of those PerSyn articles in Radio Electronics. I used a
electronic switch (the "CMOS Cookbook") to supply the hi/lo voltage
to start/stop the clock driving the counter. The counter counts from 0 to 7
and resets. The clock also gates the 4081 AND gates making sure the output
goes off before turning on again. I think the original article used 4011
NAND gates and then 4049 inverters.
Pattern Switches
Generators & Switches
Mixer & Generators
