Infrared sensing automatic startup control circuit diagram with SR5553

Published:2011/5/13 4:29:00 Author:Ecco | Keyword: Infrared sensing automatic startup control | From:SeekIC

The circuitry shows as below: It includes pyroelectric infrared sensor head, infrared sensor control circuit, SCR control circuit, music sound circuit and exchange step-down rectifier circuit, etc. This control circuit can be used as control of automatic fan boot, automatic, energy-saving lamps, security, automatic interpretation etc. Pyroelectric infrared sensor head includes pyroelectric infrared sensor P2288 and the Fresnel optical lenses. The latter connects the infrared radiation that is from human body energy, to improve the detection range. The Fresnel lens have all sorts of different specifications, common have Q - 6 type, Q1A type and Q - 8 type, etc. To make energy‘s largest gathered, it requests lens face and infrared sensors to keep a certain distance, to different lens, their spotlighting distance is different. The reasonable configuration and installing can make detection distance be improved greatly. P2288 will detect the infrared radiation that from the pedestrians, then make impedance matching and magnifiing by the filter, signal mosfet (FET), emitted by source S to the signal input (IC1 OP1P) pin 3.



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