PARTS AND MATERIALS :
- 4017 decade counter/divider (Radio Shack catalog # 276-2417)
- 555 timer IC (Radio Shack catalog # 276-1723)
- Ten-segment bargraph LED (Radio Shack catalog # 276-081)
- One SPST switch
- One 6 volt battery
- 10 kΩ resistor
- 1 MΩ resistor
- 0.1 µF capacitor (Radio Shack catalog # 272-135 or equivalent)
- Coupling capacitor, 0.047 to 0.001 µF
- Ten 470 Ω resistors
SCHEMATIC DIAGRAM
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