No not really
Hi Gary B,
In answer to your question, No, I have is a gas meter with a magnetically operated switch inside and flying leads to this switch, I want to apply the least amount of voltage to this switch but still be able to reliably detect the switch operation.
I have been looking at the 10mv or even 1v options and it now poses another question, if I supply 1v to the switch input wire and it is closed, I can see 1v at the switch output wire I want to detect this on my Atmega32 using just an I/O Pin ideally, can I just attach the switch output to a pin input along with a pulldown resistor?
P.S. The meter switch voltage range is 0v-24v so I now I'm being anal but it's more of a "how low can we go" thing
Thanks all