2 layers35.3 × 7.1 mm

Boards in 1 GitHub repository, designed in KiCad, that use the ATTINY20-UU by Microchip Technology (-40℃~+85℃ 1.8V~5.5V 10 10bit 128Byte 12MHz 2KB 8 Bit AVR Built-in FLASH WLCSP-12(1.4x1.6) Microcontrollers (MCU/MPU/SOC) ROHS). See how each wires it, with its parts, size, README and files; the ATTINY20-UU’s symbol, footprint and pinout are on its own page.
