Quote Originally Posted by malc-c View Post
Alain, the 1K base resistor was added way back after you suggested in post #46 that I removed the R4/D1 combo and and a series 1 k in the base connection

The nearest shematic I have is as detailed in post #57 - apart from the fact that I'm using a 16F676 rather than the 12F675 - the output stage is the same, I've not changed anything since, and wouldn't edit posts to suit...
We're in sync Malc ... just R3 NOT to be shorted !!! ... but placed in series with the NPN COLLECTOR ...

MEA Culpa ...

Alain