Missing pulse alarm circuit diagram

Published:2011/9/15 1:56:00 Author:Rebekka | Keyword: Missing pulse alarm | From:SeekIC

The circuit is used to detect the missing optical pulse or shortage of goods on the conveyor belt. CA3062 combination of detectors and amplifier can detect optical pulse which is synchronous with 60HZ power frequency . When switch SW1 is at A, every pulse has a interval of 16.7ms. It makes 2N2646 unijunction transistor reset at 20ms timing network. It avoids unijunction transistor triggering and triggers controlled rectifier. The alarm will be connected. When the SW1 at B, the circuit stops the detection of steady-state beam. It only alarmsat uninterrupted time.



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