Normally, we use a Joule Thief circuit to illuminate an LED higher than 3V, from a 1.5V AAA Cell, which looks outstanding and very useful. However suppose you don't have a 1.5V Cell, instead you have an access to a small 3V DC PM motor, then could you use this motor as a DC source or a tiny alternator to power the joule thief circuit and illuminate series LEDs. The answer is yes, of course you can.
A simple diode and a filter capacitor rectification would be enough to convert the supply from the motor suitable for illuminating the LED very brightly.
If the motor rotation is sustained with the help of a turbine/propeller arrangement and operated by wind energy, the LED can be kept illuminated continuously, absolutely free of cost.
Video Demonstration
Parts List
- R1 = 1K, 1/4 watt
- T1 = 8050
- TR1 = see text
- LED= 1 watt, high bright Cell = 1.5V Ni-Cd
- D1---D4 = 1N4007
- C1 = 470uF/25V
- M1 = Small 12V DC motor with propeller
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