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Re: Strange tuning problem on BitX-40

 

Does the purple wire vary from 0 to 5V when your turn the pot ?

If it does then it could be the nano.

Raj

At 18/11/2017, you wrote:
I have changed the pot - no difference. I have disconnected the purple
green and yellow wires from the pot and measured the voltages very
accurately. They are Purple wire 1.855v, Green Wire 4.91v and yellow
wire 0v.
I am still stumped. Could the problem be in the actual Arduino?
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