Fire Fly drawing

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spike1947

Joined Feb 4, 2016
167
Hi

I am attaching a drawing for a flickering LED solar charged , I am wanting to change the supply voltage to 2.4v ( from 2 x 1.2v Ni-MH ) and using 2 x solar panels from the pound shop ( giving out 5.6v ! ) , driving a flickering LED 1.8v to 2.2v .

What would I have to change to obtain my result ! .

cheers

spike
 

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Thread Starter

spike1947

Joined Feb 4, 2016
167
Possibly put a series charge resistor and diode to drop the excess voltage, and to charge the battery, or use 3.6V.
Hi

Thanks for your reply , If I use just one of the solar panels , what would I have to change , in the circuit ! .

Cheers

Spike
 

Dodgydave

Joined Jun 22, 2012
9,310
If the solar panels are 2.8 -3v, then just a diode to drop 0.7v will do to charge them up, ideally the solar panels need to give out 1.5 to 3v more than your nicads..
 
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