@▷ Diac-Triac Phase-Power Control without Hysteresis | Diagram for Schematic

Diac-Triac Phase-Power Control without Hysteresis

Hysteresis in lamp dimmer or in other electric appliance might cause some trouble if you need a fine tuning, something like out of control. This is a circuit of Diac-Triac Phase/Power Control without Hysteresis. This circuit can eliminate the hysteresis effect. Here is the circuit:

Diac Triac Phase Power Control without Hysteresis circuit schematic

The initial condition of the timing capacitor is uniform because the (a) circuit reset timing capacitor to the same level after each positive half-cycle. However, this circuit suitable only for resistive loads which the firing angle is not symmetrical throughout the range. The (b) circuit is used when the symmetrical firing is needed.

"Diac-Triac Phase-Power Control without Hysteresis Search Tags"
Power Control, dimmer