2 layers58.9 × 66.5 mm
Neopixel punk main
astuder/neopixel-punk-console
Blinking RGB LEDs with 555s and a handful of 74-series logic
53 partsMIT
Boards in 4 GitHub repositories, designed in KiCad, that use the TLC556CD by Texas Instruments (0℃~+70℃ 2.1MHz 2V~18V SOIC-14 555 Timers / Counters ROHS). See how each wires it, with its parts, size, README and files; the TLC556CD’s symbol, footprint and pinout are on its own page.
astuder/neopixel-punk-console
Blinking RGB LEDs with 555s and a handful of 74-series logic


stockmann-lab/shim_amp_hardware_linear
Hardware related to open-source shim amplifier development for MRI research

CircuitMonkey/mos-kim1-replica
MOS KIM-1 6502 replica project using CHIPz modules.
astuder/neopixel-punk-console
Blinking RGB LEDs with 555s and a handful of 74-series logic