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BRIDGE_TRIGGERED__TRIAC

2016-05-18 15:44  
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BRIDGE_TRIGGERED__TRIAC
Developed for use with AC sensor in one leg of bridge. CA3094 is shut down on negative half-cycles of line. When bridge is unbalanced so as to make pin 2 more positive than pin 3, IC is off at instant that AC line swings positive; pin 8 then goes high and drives triac into conduction. Triac conduction is maintained on next negative half-cycle by energy stored in 100-μF capacitor. Bridge unbalance in opposite direction does not trigger triac.-E. M. Noll, Linear IC Principles, Experiments, and Projects, Howard W, Sams, Indianapolis, IN, 1974, p 313-314.