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Old 19th Apr 2007, 9:55 pm   #6
Paul Stenning
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Join Date: Dec 2002
Location: Cardiff
Posts: 7,500
Default Re: I've gone green!

Originally Posted by Sam View Post
Try powering an LED. It may not light, but at least you will have tried! You can light them with a lemon, copper, and zinc, which I don't remember giving much oomph!
Two cells in series should give enough voltage for an LED.

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