Use TWH9248 and 9249 to make automatic lights

The 220V AC power is stepped down by Cl, rectified by VDI, stabilized by VD2 and filtered by capacitor C2, and a stable 12V DC
voltage is output for module A2. Al works at 6V DC voltage through the 6V regulator output inside A2. The photoresistor
RG is connected across the gate control terminal R of the TWH9249 and the 6V regulated output terminal B, so that the circuit has an automatic light control
function. During the day, the circuit will be blocked and will not work, and the lamp H will not light up. At night or when the light is brighter,
Normal operation can be resumed when the circuit blockade is lifted during dark hours . When the human body moves within the detection range , the module receives the microwave echo reflected by the human body and compares it with the transmitted microwave
. After processing by the internal circuit, a delayed signal is output from the O terminal of A2 to turn on the solid-state relay TAC108, and the lamp
H That is, it is lit. If the human body remains absolutely still or the person leaves, the light will go out after the delayed signal. If someone moves
back and forth , the light H will continue to light up. The potentiometer RP in the circuit can be used to adjust the detection sensitivity.