A drum machine made with midi controlled relays. A PIC
microcontroller decodes relay on/off codes from a sequencer program.
Below is a photo
of the insides with the top removed. More photos at my google
At the left is a guitar pickup that amplifies the percussion like,
click clack sounds of the relays. A second microphone was later added.
Toward the right, inside the box, is the homebuilt 8 channel midi
I got the unfinished box at Michaels craft
store for $5.99. Better than one I could make. The light pine wood has
nice sound qualities too.
The box was then stained and finished with semigloss brushing lacquar.
Flat black sprayed inside to enhance the flashing leds.