Quote:
Originally posted by Brians256
However, as a teaser, look up the TL594 chip by On Semiconductor (used to be part of Motorola).
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http://www.onsemi.com/pub/Collateral/TL594-D.PDF
Will be interesting to see how it pans out. PWM is usually way more expensive than variable voltage controllers like the LM317 or LM350 but maybe not with this chip. Looks to be less than $.70 each. How the rest of the circuitry is done would go nice to see.