Geobuk Single

Part of the supplied AC220V power goes to the heating wire, while the rest passes through a rectifier circuit to become DC12V and then through a constant-voltage circuit to become DC5V, which powers the microcontroller and peripheral circuits. Once reset by the power supply, the microcontroller controls function execution and the display according to the power switch and temperature control dial inputs.

When the heating unit is turned ON and a temperature is set with the temperature control dial, AC220V power is supplied to drive the heating wire, and heating operation is controlled by switching the triac ON/OFF. Once the user sets the desired temperature, the temperature sensor detects the temperature and the heater repeatedly turns off when it rises above the set temperature and on when it falls below it, maintaining the set temperature. In case of overheating, a bimetal switch is activated to prevent overheating.