At 03:27 PM 6/28/01 -0700, you wrote:

>Is a P-Channel Mosfet difficult to drive from a TTL logic level, such as a
>PIC.

It will be "off" when the gate voltage is at 12V (13.8V), so you can drive it
easily with an open-collector driver (eg. 2N4401) with a base resistor and a
pullup resistor. You may want to use a zener from source to gate and an
additional
series resistor to prevent punchthrough of the gate oxide on spikes in the
supply voltage.

Best regards,

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