Circuit diagram for a thermostat based on a microcontroller
Posted: Mon Feb 10, 2025 4:45 am
The thermostat is assembled on the basis of the K651LA7 microcircuit and is distinguished by its simplicity and ease of adjustment. Our thermostat is a special thermistor, which germany mobile database reduces resistance when heated. This resistor is included in the network of the electric voltage divider. In this circuit there is also a resistor R2, with the help of which we can set the required temperature. Based on such a scheme, you can make a thermostat for any boiler: Baxi, Ariston, Evp, Don.
Another circuit diagram of a microcontroller-based thermostat:
The device is assembled on the basis of the PIC16F84A microcontroller. The role of the sensor is performed by the DS18B20 digital thermometer. A small relay controls the load. Microswitches set the temperature, which is displayed on the indicators. Before assembly, you will need to program the microcontroller. First, erase everything from the chip and then reprogram it, and then assemble and use it to your health. The device is not capricious and works fine.
The cost of the parts is 300-400 rubles. A similar regulator model costs five times more.
Some final tips:
although different thermostat options are suitable for most models, it is still desirable that the boiler thermostat and the boiler itself are produced by the same manufacturer, this will significantly simplify the installation and the operation process itself;
Before purchasing such equipment, you need to calculate the area of the room and the required temperature in order to avoid equipment “downtime” and changing the wiring due to the connection of higher-power devices;
Before installing the equipment, you need to take care of the thermal insulation of the room, otherwise high heat losses will be inevitable, and this is an additional expense item;
If you are not sure that you need to buy expensive equipment, you can conduct a consumer experiment. Buy a cheaper mechanical thermostat, adjust it and see the result.
Another circuit diagram of a microcontroller-based thermostat:
The device is assembled on the basis of the PIC16F84A microcontroller. The role of the sensor is performed by the DS18B20 digital thermometer. A small relay controls the load. Microswitches set the temperature, which is displayed on the indicators. Before assembly, you will need to program the microcontroller. First, erase everything from the chip and then reprogram it, and then assemble and use it to your health. The device is not capricious and works fine.
The cost of the parts is 300-400 rubles. A similar regulator model costs five times more.
Some final tips:
although different thermostat options are suitable for most models, it is still desirable that the boiler thermostat and the boiler itself are produced by the same manufacturer, this will significantly simplify the installation and the operation process itself;
Before purchasing such equipment, you need to calculate the area of the room and the required temperature in order to avoid equipment “downtime” and changing the wiring due to the connection of higher-power devices;
Before installing the equipment, you need to take care of the thermal insulation of the room, otherwise high heat losses will be inevitable, and this is an additional expense item;
If you are not sure that you need to buy expensive equipment, you can conduct a consumer experiment. Buy a cheaper mechanical thermostat, adjust it and see the result.