[K3PZN-List] Voltage booster?

[WJJ Hoge]

The circuit is a self-oscillating flyback converter. The LED clamps the output at its turn on voltage. If the permeability of the core is too low or the beta of the transistor is to low, it won’t oscillate.

WJJ Hoge
himself at wjjhoge.net



On 30 Dec, 2013, at 1149 , Philip Karras <ke3fl at yahoo.com> wrote:

> Has anyone built one of these? I've been trying but have yet to get it working. It such a simple circuit I can't believe I can't get it working or figure out what I'm doing wrong!
> 
> See the Instructable called, "Making A Simple Joule Thief (made easy), by ASCAS" : (They call this circuit a "Joule Thief" because you seem the steal energy from a "dead" battery)
> http://www.instructables.com/id/Making-A-Simple-Joule-Thief-made-easy/
> 
> Any ideas about how to get this to work would be appreciated.
> 
> I'm using a 3-Volt white LED, and green core from a dead CFL, and about 20 turns of double wire.
> 
> Another I've come across is the Supper Joule Thief, "Make a SUPER Joule Thief Light! by clevelandstorms" at
> http://www.instructables.com/id/Make-a-SUPER-Joule-Thief-Light/
> 
> Perhaps I should give that one a try instead.
> 
> 73 de KE3FL,
> Phil
> AEC Carroll County
> OES, ORS, & VE
> http://cs.yrex.com/ke3fl
> Karras' Corner: http://blog.solidsignal.com/content.php/1005-karras-corner
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