After seeing information on Joule Thief LED drivers on the internet I decided to try making them. After getting some working units I started experimenting ( as I usually do ) with different sources of parts from objects I can recycle.
I found that the Kodak Max disposable camera had a transistor that worked in this circuit and a 1k resistor also required. So the idea was born to try and modify the circuit in such a way I can get my daughter involved ( and hopefully interested in electronics and recycling and away from Nintendo DS and TV )...
Her response to the finished torch.... " This is sooooo cool "...
Then I saw the Get the LED out comp and decided to share. So here is my first attempt at an Instructable.. I hope someone finds it interesting or even maybe useful.
Step 1: Get your bits..
Ok so now you know I am an electronics packrat, so here is what you will need if you wish to give it a try.
A Kodak disposable camera is required, mine was free from a photo lab that usually throws them away.
A switch that I rescued from a broken phone.
Some enamelled wire also rescued but from a microwave oven. If you are not exeprienced with high voltage then I do not reccomend you pulling apart a microwave as there is a high voltage capacitor in microwaves that can possibly kill you. The wire I used was from the microwave fan motor, you can source wire from most electronics shops or salvage from many other places like dead motors etc.
The last thing needed was a white LED, the more light output it has the better. This was the only thing I bought so this project only cost a little in money but more in time.
Oh absolute last thing that is required is lots of paper under the project with all my scribblings on it. Without this the project will never work. hehehe..
Feel free to reproduce your own paper with scribblings on it to get better results.