555 light control stroboscopic type security light circuit

Published:2011/5/22 8:14:00 Author:TaoXi | Keyword: light control, stroboscopic type, security light | From:SeekIC

As the figure 17-43 shows, the circuit is composed of the step-down rectifier circuit, the photoelectric switch circuit and the stroboscopic oscillation & control circuit, this circuit can be used in wide range of applications such as the construction scene and the road scene to remind the people to pay attention. At night, the photoelectric switch circuit which is composed of the 3DU5, the VT2 and VT3 amplifiers is in the conduction state, SCR1 triggers the conduction, the IC oscillator starts working, it conducts and cuts off the SCR2 with its oscillation frequency, so the lamp H shines to remind the people. The light flash frequency f=1.44/(RP1+R5+R6)C2.



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