I'll start tracing and drawing, as you suggest.
I was just tempted to plug it in and see what happened- but did not want to do that before working out what the third lead should connect to.
@Dammit started
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I'll start tracing and drawing, as you suggest.
I was just tempted to plug it in and see what happened- but did not want to do that before working out what the third lead should connect to.