Torch Light with Generator

A device that comes in handy during Mountaineering/Trekking

Difficulty Rating: 3/10

Motivation:
Using AA pencil cell to power a torch is too mainstream & also power consuming. And if you are a Mountaineer, where torch-light is vital, replacing these cells becomes too much of pain in the ass. Instead, how about a torch which doesn't need cell replacement in the first place??

The chargeable torch-lights (china made), like this one, have become a commonplace in today's Electronics market.

Commercial Torch-light
(Not mine)


But does anyone have a similar torchlight, which has lasted more than a year?
So I decided to make one for myself, owing to its use during one of the Mountaineering adventures.

My prototype
It works just fine !!!!!

Hardware:
A small pipe, wheel, Long screw (for charging purpose), lots of duct tape, white paper (behind LED)

Electronics:
4.8V Li-ion battery, Toggle switch, push-button switch, 9 high-power LED, Dynamo, PCB, 2 Capacitors 4700uF, IC7805 Regulator, 220 Ohm resistors, 2pin Relimate, Multi strand wire, Rectifier

Self designed electronics: Amplifier, opto coupler, LED drivers (Texas Instruments), Protection circuit for Li-ion battery, charging precautions.

The torch light has a 4.8 V Li-ion battery which is trickle-charged by the hand crank generator.

If you have any queries about designing aspect, or want to know the detailed explanation for the Torch light, feel free to contact me, or drop a comment.


Comments

  1. Anonymous26 July 2013 at 03:19

    hello , i m beginning in elex eng student,please send me ckt diagram and wrking principle of torch light with generator on mudittech@hotmail.com.
    thanks

    ReplyDelete

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