Homemade programmable thermostat!

[KORBIN5895]

I don't think there would be anyway to add multiple probes to one unit. I recommend crimping the butt splice to your extra wire first as opposed to your probe wires. That way if you mess up you don't have to try to remove it from the probe end. Also as long as your original solder studs aren't polarized ( polarized meaning the studs are different sizes so the wires only attach a certain way) you shouldn't get too worked up if you forget to mark the wires.

Looks awesome I may try it. I may also try to make some and sell them to my friends that have snakes.