PWM D.C. motor drive Low loss speed control By 4093
This circuit is a very compact switching regulator for small DC motors. I use it for my small printed circuit board drill
(18 Volt, 1.5 Amp), but it is suitable for many other applications (e.g. 12V DC halogen dimmer).
Source : PWM D.C. motor drive Low loss speed control By 4093
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