Digital Fan Speed Regulator Circuit Diagram. The setting of p1 determines the phase of the trigger pulse that fires the triac. By using triac diac and variable resister elements we can create effort less ceiling fan regulator and this regulator circuit regulates ceiling fan speed smoothly.
By using this pwm circuit you can control the speed of dc fan by moving the potentiometer variable resistance. Speed can be varied over a wide range because the circuit can alter the voltage applied to the fan motor from 130v to 230v rms in a maximum of seven steps. The circuit of light controlled digital fan regulator circuit is build around times ic decode counter 7490 bcd to 7 segment driver 7447 bcd to decimal decoder hex inverter common anode 7 segment display ldr and few other components.
The current step number is displayed on a 7 segment display.
The working voltage is 230 v ac. This is 220v ac dimmer circuit diagram based on capacitor in the capacitive dimmer regulator no noise resistor one capacitor one diac and one triac. It is used to control the speed of a ceiling fan. This circuit is based on 555 timer.
