Quantity   Component name
1 × Atmega328P Target PCB
1 × ATMEGA328P-AU Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
2 × 20 pF 0805 ceramic capacitors not needed if not using a crystal
1 × HC-49 crystal optional
1 × 0805 LED optional
1 × 1K 0805 resistor not needed if not using the power indication LED
1 × 10K 0805 resistor optional, but recommended
1 × pin header .1" (4 pins for revision 1.1, 5 for 1.2
4 × 8-pin header .1"
2 × 2-pin header .1"
1 × 4-pin header .1"
1 × 3-pin header .1" for revision 1.1, removed in 1.2
1 × 2x5 pin shrouded pin header for the ICSP socket
3 × 330 ohm 0805 resistors
3 × .1 uF 0805 ceramic capacitors