This maker turned an antique typewriter into a MIDI drum machine | Arduino Blog
Electronic Drum Machine Using Arduino - EEWeb
Drum Machine + Groove Box - Help us getting it as a real product - Audio - Arduino Forum
If you were going to buy an 808 drum kit, check this out first - element14 Community
Build a simple drum machine with Arduino: Circuit, code, enclosure and instructions to build your own sequencer drum machine with Arduino Uno and Mozzi, S. A., Rodrigo , eBook - Amazon.com
GitHub - NANOmodules/NANO-Minipops: Minipops drum machine shield for Arduino Uno.