Dimmer Circuito. Be careful that the circuit is not isolated from high voltage so the potentiometer should be installed with plastic knob. Typical filtering in light dimmers causes the current rise time current rises from 10 to 90 to be in range of 30 50 microseconds.
Don t touch the circuit or you ll be shocked by the electricity. In the last section we saw that a dimmer switch rapidly turns a light circuit on and off to reduce the energy flowing to a light switch. A simpler led lamp dimmer circuit in the above design we seem to have missed one crucial point.
A triac is a small semiconductor device similar to a diode or transistor.
All led lamps use dc operated circuits and therefore incorporate an internal bridge rectifier to convert the input ac to dc. Don t touch the circuit or you ll be shocked by the electricity. Most dimmers are designed to fit a standard wall box opening which makes it easy to replace the switch for any incandescent or halogen light with a dimmer. Dimmer circuits typically use coils that limit limit the rate of rise of current to that value which would result in acceptable emi.
