AC_CONTROL_WITH_TRIAC

Published:2009/7/12 21:34:00 Author:May | From:SeekIC

Decoder outputs of microprocessor feed 7476 JK fliρ-floρ thatdrives optocoupler which triggers triac for ON/OFF control of lamp or other AC load. LED andcadmium sulfide photocell are mounted in light shield. When light fron LED is on photocell, cell resistance drops and allows control voltage of correct direction and amplitude to trigger gate of triac, turning it on. When light disappears,triac remains on until voltage falls near zero in AC cycle.-R. Wright, Utilize ASCLL Control Codes!, Kilobaud, Oct, 1977, p 80-83.



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