A digital thermostat uses a simple device known as a thermistor to measure temperature. This is a resistor which allows electrical resistance to change with temperature. The digital thermostat has a microcontroller which measures the resistance while converting the number to an actual temperature reading.
A digital thermostat is superior to other types of thermostats as it can perform some functions that regular mechanical thermostats cannot. Among the unique features of a digital thermostat are the programmable settings. During winter, it can be programmed to automatically turn up the heat for a few hours as one prepares for work. The heat can also be turned down until people come home from work, turn up the heat in the evening and again turn it down at sleeping time. This way, the digital thermostat helps in saving money as it can simply be turned down when it is not required.