Lucian wrote:
> I need to design a schematic where I could turn off the power to some
> 12V sensors connected to the schematic from a microcontroller. I was
> thinking using a latch and 15V switches, but I need at least 50mA
> current to each sensor, so I don't know if there is Thanks.

Is switching the ground acceptable?  If so, a jellybean NPN transistor
driven via a 4.3Kohm base resistor from a PIC pin will do fine.  Emitter
to ground, collector to the load.

You should assume that this leaves the low side of the sensor up to 300mV
above ground.  If that is too much, use a logic level FET.  Gate driven
directly from PIC pin, source to ground, drain to the load.  This is
simpler, but will be more expensive.


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