Basic Led brightness control.

167

02:29:04

The fullest extent of the potentiometer is able to be used by the careful selection of offset resistors. (EC doesn't let you use the full potentiometer any way.)

published 9 years ago

hurz

9 years ago

Led brightness can be seen as a function of the current you apply. 20mA max brightness and e.g. 2mA still visible but almost off. So the trick is to build a stable voltage cintrolled current sink. Check this http://everycircuit.com/circuit/6664970226106368

BillyT

9 years ago

@hurz, yes that makes sense, I had to play with it a bit to understand what was happening.

hurz

9 years ago

Here the model http://everycircuit.com/circuit/5612536322064384

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