Quantity   Component name
2 × C1, C5 0.1uF 50v X7R ceramic capacitor, radial 0.1"LS
1 × C2 2.2uF 16v tantalum capacitor, radial 0.2"LS
4 × C3, C4, C6, C7 0.047uF 50v X7R ceramic capacitor, axial 0.3"LS
3 × D1, D2, D3 1N5818 Schottky diode
2 × D4, D5 Red LED T1
3 × LED1, LED2, LED3 3-digit 7-segment red 0.31" LED display, common cathode, 3361AS
1 × P1 6-pin Molex KK (for CH340) or 6-pin right-angle 0.025"sq pin header (for FTDI) USB adapter
2 × P2 Keystone #82 AAA battery clips
3 × P3, P4, P5 3-pin 0.025” square pin header, 0.1"LS
3 × P3A, P4A, P5A shorting jumpers for 3-pin headers
1 × Q1 FJN4303 PNP transistor with 22k base resistors, TO-92
1 × R1 1meg 5% 1/4w resistor
1 × R2 39K 1% 1/4w resistor
2 × R3, R4 4.7Kx9 bussed 10-pin SIP resistor
1 × R5 4.7K 5% 1/4w resistor
16 × S0-9, SR, SP, SM, S+, S-, S* tactile pushbutton switch 0.25"LS
1 × SP1 piezo speaker 0.15"LS 0.7"dia
1 × SW SPDT slide switch 0.08"LS
1 × U1 OKI M80C85A or Intersil CP80C85A microprocessor
1 × U1A 40-pin socket strip. Cut into two 20-pin strips for U1
1 × U2 74HC573 octal latch
1 × U3 27C256 32k EPROM, 39SF010 128k, 39SF020 256k, or 39SF040 512K flash ROM
1 × U3A 40-pin socket strip. Cut into two 16-pin strips for U3
1 × U4 CY7C199 or equivalent 0.3” wide 32K RAM
1 × U5 Capacitors / Ceramic
1 × U6 OKI M82C55A or Intersil CP82C55A triple 8-bit I/O port
1 × U6A 40-pin socket strip. Cut into two 20-pin strips for U6
1 × U7 Capacitors / Ceramic
1 × U8 Potentiometers, Trimmers, Variable Resistors / Trimmer Potentiometers
1 × Y1 Electronic Components / Misc. Electronic Components