Looking at the pcb the top 2 holes are joined with a trace. the 3rd hole has a trace running off somewhere and the bottom hole, I can't tell. If it has a trace its on top side.
I tried using hole 2-3 and 2-4. either way a pretty sharp adjustment curve on the trimmer. I guess it is what it is and that's okay. So I'm moving on to other toys. maybe Ill add some temp sensors.?
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regards,
Bryan, N0LUF
