2 layers56.9 × 24.6 mm

KiCad boards from 5 GitHub repositories tagged “avrdude”, the most starred first; open any of them in PCBKit.



QuintusJoyal/avr-irremote-led-lamp
the signals on the bus go blink, blink, blink

69series/attiny85-usb-hid
ATTiny85 HID automation keyboard both firmware and hardware design in baremetal C and KICAD 10 respectively.
