The idea is simple, use an Arduino and a few simple components along with a small LCD screen to create a functioning thermostat.
Arduino Thermostat Includes Vacation Mode | Hackaday
In this tutorial we will show how to build WiFi controlled thermostat with Arduino and touch screen display. Thermostat will also show other info, like.
Best list of arduino project ideas along with sources we have published here. It includes arduino based battery charger, arduino based thermostat and etc.
The Goal of the Project is a Thermostat for my 2 Fish Tank's with LCD Display RGB LED an Relay to control the Heater in the Tank an a Cooling Fan for the Big.
Prototyping the Test Circuit