Analog in on OI: Heads Up!

[Biff]

Originally Posted by Astronouth7303

Heads up: The OI will output 127 for what it perseves as infinate resistance. I'm not sure of the exact threshold, but my theory is that when volts <= 0.1, it outputs 127. But noise (flickers between 0 and 127) goes until about 0.110 or 0.115.

So if, as an example, you wire a potentiometer to p4_aux, when the pot. is all the way down, p4_aux=127. when it's a little higher, p4_aux=0.

also, 127 appears in it's "normal" position (midway 'round). So you can't just put in an if statement.

I hear this is by design. So watch out!

This is designed this way, I asked the people at Innovation First they said when there is 0 volts on the input, the default is 127. We tested ours and voltage level of 0.3 or so will get you 0 for that input less than that voltage and results vary. We are using 15K pots with 560 ohms feeding the ground side of two pots. Ie 7.5 k in series with the 560. Hope this helps.