ref value footprint C1 27pF C2 27pF C4 100nF C5 10µF D2 LED D3 3.6V D4 3.6V IC1 ATMEGA8-P DIP-28__300 JP1 FWUP PS2 CONN_6 Mini_din6 R1 10K R2 470R R4 2.2KR R5 480R R6 68R R7 68R R8 10K USB1 CONN_4 X1 16MHz