Partlist
Resistors are 1/4W 5% (or better) and capacitors are 5mm pin-spacing
| Part | Value | Qty | Notes |
|---|---|---|---|
| C1 | 100n | 1 | |
| C3-C4 | 22p | 2 | |
| C5 | 10n | 1 | |
| D1 | 1N400X | 1 | Any 1N400X-series diode will do here (e.g 1N4001) |
| D2 | 1N4148 | 1 | |
| IC1 | 74HC14 | 1 | |
| IC2 | LM7805 | 1 | |
| IC3 | PIC16F628A-I/P | 1 | DIP18, socket-mounted |
| ICSP | SIL 6-pin male header | 1 | optional |
| J1 | 2mm DC Jack plug | 1 | |
| LED1-5 | 3mm LED | 5 | color to your liking |
| OK1 | 6N138 | 1 | |
| Q1 | 20MHz Xtal | 1 | |
| R1-R5 | 1k | 5 | These values can be adjusted to match your preference and LEDs. Typical values range from 220Ω to 1kΩ |
| R6 | 220 | 1 | |
| R7 | 470 | 1 | |
| R8 | 1k | 1 | |
| S1-S4 | B3F-31XX | 4 | Vertical-mount tactile switch. The PCB is designed for Omron’s B3F-31XX series but other switches might fit |
| X2 | DIN-5 female | 1 | The PCB is designed to accomodate almost all models avaible. Suggested part: Farnell 1791756 or Mouser 502-57PC5F |