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1st November 2007, 03:44 PM
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Could he use a digital potentiometer on the base of a power bjt? The ones I can find are in 50k and 10k values. Using the full 10k should be close enough to 0mA like he wants, and the minimum is around 40ohms I think. It has around 40ohm steps.
EDIT: found this:http://www.analog.com/en/subCat/0,28...er_subcat_ptab Last edited by Ambient; 1st November 2007 at 03:50 PM. |
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