Basic_triac_zero_point_switch

Published:2009/7/21 23:16:00 Author:Jessie | From:SeekIC

This circuit shows a manually controlled zero-point switch that is useful in power control for resistive loads. Q2 turns on near zero on both the positive and negative half-cycles of the line input. When S1 is closed, Q1 turns on, shunts gate current away from Q2, and keeps Q2 from turning on during either half cycle. The 2N6346 triac shown will handle resistive loads up to 8 A.



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