2 layers62.5 × 67 mm

SD Tape Player
GadgetReboot/SD_Tape_Player
Play computer cassette data audio files from a micro SD card with Arduino Nano
36 parts1
Boards in 2 GitHub repositories, designed in KiCad, that use the B3F-3100 by Omron (-25℃~+70℃ 1 million cycles 1N 24V 50mA 6mm 6mm PC Pin Right Angle Round Button SPST-NO DIP Tactile Switches ROHS). See how each wires it, with its parts, size, README and files; the B3F-3100’s symbol, footprint and pinout are on its own page.

GadgetReboot/SD_Tape_Player
Play computer cassette data audio files from a micro SD card with Arduino Nano

daisybiopcr/mira
The Mira PCR Thermocycler's electronical, mechanical, and firmware design.