I have been tweaking my Arduino project lately and have got some decent results. I started by setting up the relay and thermistor separately. The plan was to turn on and off a fan based on when the room was hot or cold. Of course the hot and cold values were just our preference as set in the Arduino’s code.

Here is what the current prototype looks like.

Graphing the serial output was something that helped us choose what temperature to turn on and off at. It currently sits near the heater and helps to circulate the warm air.