Project A Solid -State Electric -Blanket Controller* - SchematicsForFree

electric blanket's heating element to light the green LED element inside LEDI. At this time, the red LED ele- ment remains off due to the triac's high resistance. However, when the setting of R2 is turned up slightly, Ql begins to conduct for a brief period of time at the beginning of each half - cycle. For this short time, the green ................
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