Halogen Lamp Dimmer   

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The circuit and load is shown to control a Halogen lamp, it could be applied to a common incandescent lamp for touch-controlled dimming. For a circuit to control a heavy-duty inductive load where an alternistor is not compatible or available, two SCRs can be driven by an inexpensive TO-92 Triac to make a very high current Triac or alternistor equivalent.

Triac Driving Two Inverse Parallel Non-Sensitive Gate SCRs

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    Phase Control Using Thyristors