Light-emitting diode drive control circuit

摘要

The present invention provides a light-emitting diode (LED) drive control circuit having an input terminal and an output terminal. The input terminal and a switching device are coupled in series between power supply terminals. The output terminal is coupled to an LED. The switching device includes a single-pole double-throw switch. A first branch of the single-pole double-throw switch is a wire. A second branch of the single-pole double-throw switch includes a resistor and an indicator in series. The circuit includes a semiconductor switch that is either on or off. When the single-pole double-throw switch is switched to the first branch, the semiconductor switch is on and turns on the LED. When the single-pole double-throw switch is switched to the second branch, the semiconductor switch is off and turns off the LED. The circuit can effectively turn the LED on and off to avoid power leakage and slight emission of light.