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Thread: A/D with Vref+
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face BY : Mike Mansheim email (remove spam text)



> I am trying to do an A/D with the input source to A/D
> channel 0 of 16F873 and I have configured ADCON1 to
> have 00000101 with a vref+ of 1V from volt divider and
> vref- to be Vss. However I get a all '1's output from
> my output ports even though the input volt is less
> than 1V. Cant figure out the problem here.

tris set to input?

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