LED Bike Light System - Instructables
The "Instructable" outlining the construction of a do-it-yourself LED Bike Light System may seem a little more complex than the other "homemade" flashlights or lamps featured before but if you feel up to the challenge you can try your hand at the headlight or both the headlight/taillight bike light system.
Assembly Parts:
For headlight:
Wire
18 Leds (white 25000mcd)
Small Breadboard
Reflector w/ bracket
9v snap connector
Switch
For taillight:
Old Bay Tin
Switch
PNP Transistor (3906)
NPN Transistor (2222)
555 Timer
150k resistor
4.7k resistor
1uF Capacitor
160 Capacitor
220 Capacitor
Breadboard
LEDs
Wire
2 x molex KK connectors
Source: Instructables