piclist 2001\01\04\140440a >
Thread: strange output port.
face BY : Dan Michaels email (remove spam text)

At 03:52 PM 1/4/01 -0200, you wrote:
>I tryed  to use  PIC16C621A, RA4 as output, open drain. I put a 10K resistor
>to Vcc and the base of a npn transistor in RA4 to drive a relay (relay
>conected on colector with diode self induction protection, and emitter to

Do you have a resistor between RA4 and the base? If not,
put one in.

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See also: www.piclist.com/techref/microchip/ios.htm?key=output
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