Step 1: Components
All electronics is mounted on a RadioShack component PC Board 276-168.
Here is the list of other components:
Central processor ATmega 168
Nine Bi-polar bi-color 5mm Green/Red LEDs.
RadioShack 2 AAA battery holder 270-398
Nine resistors 51 Ohm 0.25 W (0.125 W is OK as well)
Panasonic EVQ-WTEF2515B Encoder
Ceramic capacitor 0.47 uF.
RadioShack slide switch 275-409
Male headers 2.54 mm to make six contacts ISP header.
RadioShack 2-pack 14-PIN IC socket (optional, just to have the possibility to reuse controller on other projects).
Hook-up 26 gauge wire and 30 gauge wire .