• This is not for the beginner
  • The 4 amp fuse is there to protect from shorts, and over current draws, since the relays can handle the 4 amps with no problem, I chose a safer value for the fuse, while still giving enough for 2 fans, and solenoid.
  • Relays are symetrical looking down or from the bottom, so pin-out doesn't matter, based on the types chosen. (All relays follow this pattern)


I just got back in town, and switched to 12/12 yesterday, so I had a lot to do with being gone for a few days. I will have pics up today with more detail. Speaker wire is actually safer than using single strand wire due to the nature of electricity. Anyone who has any knowledge of it can tell you that the greater surface area there is, the more current you can put across the wire. Current does not flow through a solid wire in as much as on the surface of a wire.
I am not the best in drawing schematics, but do know how to draw them. And this was taken directly from the unit I HAVE BUILT, HAVE WORKING, and HAVE GROWING tomatoes.

I'm not an EE, but you don't have to be one to figure out how to build a simple design like this. And yes, temp is for the thermostat. As is CO2 for the telair 8001 (or similar)

More to come...