The dual-control delay does not light during the day. When the person enters the infrared sensing main area (6~10m) after the darkness, the electric light will automatically light up for pedestrian lighting. After the person leaves, the light automatically goes out. Its circuit consists of infrared switch, photoelectric switch, monostable delay circuit and thyristor control circuit, as shown in the figure.
The photoelectric switch is composed of photosensitive resistors RG (Cds), R15, RP2, R14 and VT2. During daylight, the RG is low-resistance (light resistance is a few K to tens of K). After it is divided by R15 and RP1, the VT2 is saturated and turned on. The saturation voltage drop is only 0.3V, so the 555's 4 feet are firmly fixed. The clamp is at a low level, causing the 555 to be in a forced reset state.
Wireless Charger
Wireless Charging, also known as Inductive Charging, is a convenient and cable-free way to charge your electronic devices. It requires two things: A charger, usually in the form of a puck, a mat or a stand that connects to a power source.The types include wireless Phone Charger,charging stand for phone,etc..
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