Necklace Joule Thief

by Modarius

10K508

Intro: Necklace Joule Thief


Yes, I have managed to reinvent the wheel but I hadn't seen anything like this done before so here it is. This project is not quite finished, I still have to put it on a loop for a chain and figure out where to put the battery as I think that it would look good incorporated as part of the necklace. The I used was found on this, http://www.emanator.demon.co.uk/bigclive/joule.htm , site. It is actually a fairly bright light but it was somewhat washed out by the sun. The loop on the back is just excess wire and will be cut off as soon as I further finalize the design. I hope you enjoy!!

PS. I figured I would add it to the green living contest as it uses almost dead batteries until they are totally drained.

7 Comments

BobW4 9 years ago

Lovely so nice and small do you have a parts list as the battery must be very small?

Bob

qfe0 12 years ago

that looks great! how do you make it? what parts did you use?

Modarius 12 years ago

I used a toroid that I found in a power supply, some wire from a transformer, a 2N4401 transistor and a 1K resistor. I think that the red LED was from a crank up emergency flashlight. Like I said, nothing special with the circuitry, just a different packaging. I am also considering putting in a color cycling RGB led just for fun :D

mittu gat 11 years ago

i rlly like what youv made but can i use 2n 904 instead of 2n4401?

nccwarp9 12 years ago

Where is the battery ?

Modarius 12 years ago

Sorry I didn't get a good pic of the battery but in the main image on the lower right corner of the coil you can kinda see the silver of the button cell I used.