Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Yes, they all have the same ground and all and currently used to trip relays in the HVAC system. I have no access to the relays and need to tap in at the thermostat terminals.
I tried to scan a sketch but have never used this board before and may not have done it correctly. If not I'll try again.
no, I don't believe so. I'm taping into a standard thermostat which has a ground and common lead which are both tied together at the thermostat. then I am trying to build a monitor that will tell me when the thermostat put 24vac on any to the 5 outputs.
I am trying to build a monitoring device for my HVAC so I can see which stages are active. There a 5 24vac signals that could be on or off at any time. would like to have 5 LEDs, one on each signal, to monitor this. I would like to use the fewest parts possible, like driving all 5 individual...
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