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Optical Smoke Alarm CircuitsOptical Smoke Detector - Electronics For You 1 shows the circuit of the smoke detector, while Fig. 2 shows pin configurations of sensor H21A1 and transistor BC547. Fig. 1: Circuit of optical How To Make Smoke Detector Alarm Circuit - Electronics Hub In this project, we are implementing a simple Smoke Detector Smoke Detector Circuit - ElectroSchematics It relies on the smoke that is produced in the event of a fire and passes between a bulb and an LDR, the amount of light falling on the LDR decreases. Smoke Alarm Circuit - ElectroSchematics The photo-interrupter is simply an optical coupler with the elements separated with a slot. See the smoke alarm schematic for alternative devices /circuits. Smoke Detector Circuit using 555 Timer with Working Operation 555 Timer based Smoke Detector Circuit Diagram and Its Working Smoke detector circuit - Electronic projects circuits A smoke detector is part of a sophisticated alarm system,within the system is a professional, most will include Section detector gas, room filling ions. The Optical Smoke Detector uses a state of the art optical chamber combined with an application specific integrated circuit (ASIC) to provide quick and accurate
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