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...
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