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'Driving P-channel mosfet. [EE]'
2020\09\12@131600 by Byron Jeff

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PIC output maxes out at 25ma. You're swinging the line by 5V.
V=IR so R=V/I = 5/0.025 = 200 ohms.

Personally I wouldn't trust using the PIC's internal resistance to limit
the current. The primary purpose of the resistor is to set the speed of the
gate since it functions as a capacitor. So the lower the resistance, the
faster the gate charges/discharges.

So, put something in the ballpark of 200 ohms and everything should be
fine.

BAJ

On Sat, Sep 12, 2020 at 04:59:08PM +0100, David C Brown wrote:
{Quote hidden}

-- Byron A. Jeff
Associate Professor: Department of Computer Science and Information Technology
College of Information and Mathematical Sciences
Clayton State University
http://faculty.clayton.edu/bjeff
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