This is a quick guide on how to use an Arduino© to control whether a cooling fan and a heater is turned on depending on the detected temperature from a TC74 Arduino sensor.
This is for a final project for an Electronics class I am currently taking, though I came into this project with pragmatism in mind, because of the hot summers and cold winters (ok, 60 degrees indoors is cold for me, but that's probably because I'm Californian).
Working on this project should give good hands-on practice in working with the Arduino, soldering, and general circuitry, as well as coding for the Arduino and workin gon the logic needed for the coding.
Why adjust the fan and/or heater if the Arduino can do it for you? (Ok, this is probably easy enough to do, but making it technologized (not a word) is just much cooler (no pun intended).
Also, there is a video at the end of this Instructables if you'd like everything described verbally.
Best of luck!Step 1
* An Arduino© microcontroller, made by Arduino (with USB connector)
* A Fan (This project used the following one: http://www.amazon.com/Lasko-Personal-Inches-White-2002W/dp/B000QR6VXW/ref=sr_1_1?s=home-garden&ie=UTF8&qid=1333608671&sr=1-1
* A Heater (This project used the following heater: http://www.amazon.com/Pelonis-Heater-fan-Heat-Settings/dp/B000PAQHLG/ref=sr_1_32?s=home-garden&ie=UTF8&qid=1333608582&sr=1-32
* TC74 Temperature Sensor
* Relays, Relays here were solid-state relays, with a smaller current (2 Amp) Crydom D2W202F for the Fan and a large current 25 Amps NTE Electronics Relay for the heater, which requires up to 1500W.
* A breadboard
* Heat-shrink tubes
* Two wall outlets for use
* Two optional (10,000 ohm) potentiometers
* A computer with Arduino software
* Soldering iron
* Wire cutter and wire stripper
* Screwdriver or alternative
* Heat gun (optional)
Safety warning: Live wires may be dangerous, especially when either the fan or heater is plugged in. Please either use the heat-shrink tubes to cover these up or better yet, box the whole contraption.