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Circuit to power on and off load from positive and negative

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TekUT

TekUT

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I've used this circuit to power on and off a sensor in order to make some measurement only when I need (was for a portable battery powered system). Sensor was powerd from +12SENS and -12SENS but you can set load also from power line and the reference voltage, all drived by a single pin of a micro (signal ENVPWR).

Hope this can be useful.

Cheers
F.F. a.k.a. Powermos
 

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