Light control LED street lamp for institution and school office buildings
A technology for LED street lamps and office buildings, which is applied in the direction of light source, electric light source, electric lamp circuit layout, etc., can solve the problems of increasing the labor intensity of the staff, and achieve the effect of improving the social image and reducing the labor intensity
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[0006] As shown in the attached figure, IC1 is a constant current driver for LED bulb lamps sold on the market. The power is determined by the wattage of the bulb lamp. The lamps of the lamps have E27 or B22 lamp holders connected to 220V AC power supply and output DC power. Supply light control circuit and light emitting board.
[0007] As shown in the attached figure, IC2 and peripheral circuits form a light control circuit. The type of IC2 is an integrated chip of 555, and R1 is a photoresistor. During the day, when light irradiates R1, the resistance of R1 shows a low resistance, which causes the potential of R2 to rise. When the raised potential is greater than 2 / 3U CC At night, the pin 3 of IC2 outputs a low level, and the LED of the luminescent board goes out; at night, when night falls, the resistance value of R1 increases, causing the potential of R2 to decrease. When the reduced potential is lower than 1 / 3U CC At this time, pin 3 of 1C2 outputs a high level to drive...
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