I wonder if anybody has experiances with the Raspberry Pi and an Liquid Flow Meter like the one from Adafruit website: https://www.adafruit.com/products/833
I was thinking i could use an NPN. so the base would trigger my GPIO pin.
But now i see that the ground need to be on the same ground as the central heating. (true?)
We will need to know a little more about it to help you: - Are you trying to detect when your heating system is running, or are you trying to tell it when you want it to run? - How does the voltage you are trying to sense vary? Does it switch between 0V an 24V? - Is the voltage AC or DC? Hey Xian. ...
Hey there, I'm quite enthousiastic about the pi en de GPIO options. I have, for me, an awesome idea. But at the moment im stuck. What I need to find out is the following; We use the Honeywell Chronotherm iv as a thermostat for our central heating. What i need to find out is when the honeywell is mak...