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Joule Thief Flashlight Upgrade



Well, Here we go......"The Victim", a very small AAA flashlight.

I'd like to thank " unknownuser 2007 " and " 1up" for the details and information about this project, giving me the gumption to try this.......

Joule Thief Flashlight Upgrade

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step 1The " Victim " to be upgraded.

This is a small flashlight that came with a cellphone case. It's good point is it came with the belt carry case for the cellphone in it's own pocket. It's bad point(s) are …

step 2The infamous parts list.

Here is what I used :(1)  2N3904 Transistor  1(1)  3K 1/8W Resistor    3(1)  .001 uf Capacitor      2(1)  Toroid Transformer Core  ( See Details ) 4(1)  White LEDMa…

step 3Building the LED upgrade.

I started with making the toroid transformer. The core is salvaged from a defunct CFL lamp. Other sources can be a dead computer power supply, or other electronics.I remove…

step 4Building the upgrade part 2

Using the toroid as a base,  I attached the transistor,  using a tiny dab of the ever-present hot-melt glue,  then added the resistor, making a small, solid assembly.The un…

step 5Clearing the way.

Insofar as I needed the room, the lamp, reflector and the front "window" was removed, leaving the front shell empty. The upgrade will simply plug in where the bulb used to …

step 6Sealing & Finishing

To finish this, I used a short stub of heat-shrink tubing to protect the LED, then sealed all of this into the flashlight using the infamous hot-melt glue.

step 7The end results and a few variants

After the hot-melt glue cools and sets, trim as needed.I've added photos, both off and turned on.The project also lends itself well to other ideas, as well.  I've  adapted …

step 8The Aftermath.....

Well,  I've done all I can, for now, after a couple of days at the computer putting this together.Now, I can share a couple of photos, sorta behind the scenes........The fi…

Via Instructables, Published: 2009.10.20


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