When you switch on your fan or light, chances are you also have a dimmer controller to control the speed of the fan or the intensity of the incandescent or LED light. Typically, dimmers are useful only where alternating currents are used, because they have components that allow only part of the waveform to reach the appliance. That means the appliance receives only part of the energy supplied and hence runs slower or glows dimly. Dimmers accomplish this AC waveform chopping or phase control with Read more [...]