What is the principle of acousto-optic control switch?
The concept is an energy-saving electronic switch with no contact inside, which uses sound effect to excite the pickup to carry out acoustic-electrical conversion to control the electrical appliance to turn on, and can automatically disconnect the power supply after a period of delay. Widely used in corridors, building corridors, bathrooms, toilets, factories, courtyards and other places, it is a modern ideal new green lighting switch, which prolongs the service life of light bulbs. Control method: during the day or when the light is strong, the circuit is turned off and the lights are turned off. When the light is dim or the night comes, the switch enters the preparatory working state. At this time, when there are sound sources such as footsteps, voices and applause. The switch is automatically turned on, the light is turned on, the automatic delay circuit is triggered, and it is automatically turned off after a period of delay, thus realizing "the light is turned on when people come, and turned off when people leave", saving the ever-burning lamp. Main structure and working principle The acousto-optic control delay switch is mainly composed of sound control switch, light control switch and delay circuit. Voice control is to collect sound through a cylindrical microphone and generate pulse signals. The light control circuit is controlled by the photoresistor, and the resistance of the photoresistor is very different when there is light and there is no light, which can generate high and low levels and control the circuit through logic devices. The delay circuit consists of a charge-discharge circuit composed of a resistor and a capacitor, which is realized by charging and discharging the capacitor.