Guys, if you’re looking for a highly accurate Electronic Temperature-controlled relay, but you don’t want to buy it on at the electronic store, then you should have a sneak peek on this 0 to 100 oC Electronic Temperature-controlled Relay.

This electronic temperature-controlled relay is a little bit different from the others, as it can be used in applications, especially where automatic temperature control is needed.

0 - 100C Electronic Temperature-Controlled Relay

For your information, the circuit switches a miniature relay ON/OFF. The single chip temperature sensor LM35 is necessary in this project, as it detects the changes of temperature. The relay is automatically actuated, when the LM35 detects a temperature higher than the preset level. Otherwise, the relay is de-energized, if the temperature falls below the preset temperature.

Do keep in mind that the LM35 temperature sensor is the heart of the circuit, which is factory-calibrated in the Celcius scale with a linear Degree to Volt conversion function. This means, all the output voltage changes linearly with temperature from 0V to 1000mV, or from 0oC to 100oC relatively.

Another advantage of this circuit is it can be powered by any AC or DC 12V supply or battery (100mA).