LIGHT_BEAM_OPERATED_ON_OFF_RELAY

Published:2009/6/24 23:50:00 Author:May | From:SeekIC

When a beam of light strikes the photocell, the voltage across neon lamp NE-1 rises sharply. NE-1 turns on and fires the SCR. K1 is an impulse relay whose contacts stay in position even after coil current is removed. The first impulse opens K1's contacts, the second impulse closes them, etc.



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