Building a Simple Dimmer Circuit
In this example a potentiometer is controlling the firing point of the triac.
Capacitor C4 is charged via resistors R3, R4, P1, and R5. After a certain time,
dependant on the potentiometer, the charge contained in C4 is large enough for
diac D to start conducting, so that a firing pulse is applied to the gate of
the triac. Consequently the triac conducts and power is transferred to the lamp.
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Inductive loads
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