my recent reads..

Atomic Accidents: A History of Nuclear Meltdowns and Disasters; From the Ozark Mountains to Fukushima
Power Sources and Supplies: World Class Designs
Red Storm Rising
Locked On
Analog Circuits Cookbook
The Teeth Of The Tiger
Sharpe's Gold
Without Remorse
Practical Oscillator Handbook
Red Rabbit

Wednesday, February 24, 2016

LittleArduinoProjects#129 Relaxation Joule Thief

I was inspired by w2aew's excellent video to check out the Ears To Our World humanlight project. It's a good cause, although shipping costs kill the idea of buying one myself - better just to make a direct donation.

It's also an interesting circuit - a variation on the many "joule thief" circuits out there - and also demonstrates some of the basics that under-pin boost converter power supplies.

As always, all notes, schematics and code are in the Little Arduino Projects repo on GitHub.

With my particular mix of components, I'm getting almost 40% duty cycle which actually produces an apparently very bright LED on just 1.5V supply.

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