Google Nest Community

I have a nest thermostat and no c wire, but there are extra unused wires available. Can I simply get a plug-in transformer and attach it to the nest to give it the power it needs? Or is there more that I need to do to control the system? Thanks

I want to install a nest thermostat to control the 3 zones in my house. But there isn’t a CWire currently connected to my existing thermostats and when I installed the first NEST, it said it wasn’t getting enough power. But I DO have an extra wire in...