Bill of Materials
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Power
- LiCB CR2032 3V Lithium Battery
- CR2032 Battery Holder (I used this one: amzn.to/3iM4NYq)

Resistors
- 1M (2)
- 1k 

Capacitors
- 4.7u (2)

Transistors
- BC548 (2)
- BC557 (2)

Diodes
- Red LED (3)
- Green LED (3)
- Yellow LED

Hardware
- Small SPDT Slide Switch (get this style if you want it to fit on PCB: amzn.to/3WyHC1H)