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Re: Driving relay with transistor question

Subject: Re: Driving relay with transistor question
From: Bob Monsen
Date: Thu, 15 Dec 2005 22:08:31 -0800
Newsgroups: sci.electronics.basics
On Thu, 15 Dec 2005 13:43:17 -0800, jdege wrote:

> In series between the output pin and the base of the transistor?

A PIC will source 20mA or more from out output. That will really saturate
the NPN. You can probably cut that back to less than 10mA using a resistor
between output and base, and still maintain saturation. If you do this,
you can just put the LED in series here.

  Bob Monsen

PATRICIA PAIWONSKI gave Ben Caxton the all-out kiss of brotherhood
before he knew what hit him.

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