PULSE_GENERATION_BY_INTERRUPTING_A_LIGHT_BEAM

Published:2009/6/24 22:27:00 Author:May | From:SeekIC

This circuit puts out a pulse when an object on the conveyor belt blocks the light source. The light source keeps the phototran-istor turned on. This produces a high-logic-level voltage at the Schmitt-trigger inverter and a TTL-compatible low logic level at pin 5 of the monostable. When an object blocks the light, TIL81 turns off the Schmitt-trigger inverter to triggers the one shot.



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