Using Analog Inputs as Digital (on the OI) - Page 2

Alan Anderson · #16 10-03-2008, 16:38

Quote:

Originally Posted by sumadin

Hmm. I'm just about to wire the switch, and I'm wondering if I really need a connection to ground. Shouldn't I just be able to wire: +5 aux -> 10k resistor -> switch -> analog input, all in series?

You've got it right. An open circuit will be read as 127, and with the switch closed you should see something like 230. No ground connection is needed (or wanted -- it could trigger the open-circuit detector and be read as 127 too).

Guy Davidson · #17 10-03-2008, 17:17

Awesome, thank you very much. This is all coming as a good use of our fix-it window to improve upon our control system.

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