Here’s my entry to the 555 contest -
It’s a synth/sequencer that uses a shift register and 9 x 555 timers, the unit has 8 independent oscillators, 8 sequencer steps and a main tempo oscillator with note length control.
It has a few lights, knobs and dials built into a project box with a hand made wooden face and a nice analog signal meter :)
Please Note: Unfortunately the schematic for this build is no longer available.