Arduino Nano Three Channel Thermostat

Arduino Three channel thermostat circuit uses 3 digital temperature sensors DS18B20 for measurement, an encoder module and an LCD2004 LCD with I2C module as an indicator.

Arduino Nano Three channel thermostat circuit control is simple, settings are made using the encoder button. The first, second and third lines of the LCD2004 screen (with I2C module) show the readings of the DS18B20 digital temperature sensor for each channel separately, as well as the opening and closing temperature.

The heating elements are controlled using 3 relays. The fourth line of the screen shows the status of the 3 relays. When the thermostat is turned on, the temperature starts to rise to the Toff value, then the temperature drops to the Ton value, the heating is turned on again and the cycle is repeated again.

The control temperature values ​​are stored in the permanent memory of the microcontroller.

source: rcl-radio.ru/?p=130777