Thyristor circuit diagram of integrated flip-flop td1028

This circuit can control the output power of 1~2kW. The load can be a rice cooker, etc. Adjusting the potentiometer Rp (47M ohms) can change the output power from 0 to 100%. The capacitor Ct is used to adjust the working time. In Figure a, Ct=47uF, and the corresponding minimum time is 15s. The selection of resistors R1 and R2 should ensure sufficient power adjustment range. The relationship between the output power P and the adjustment range (both expressed as percentages) is shown in Figure b.