LIGHT_BEAM_ALARM_FOR_INTRUSION_DETECTION

Published:2009/6/14 22:46:00 Author:May | From:SeekIC

When the light beam that falls in the CDSphotocell is interrupted，transistor(EN3904) conducts thereby triggering SCR1 (C106) and activating alarm bell. S1 resets the SCR. The alarm bell should be a self-interrupttng electromechanical type.



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