| 摘要 |
A circuit for driving a light emitting diode (LED), the circuit includes a timer, first to third electronic switches, and a regulator. The timer provides a pulse signal to switch the first and second electronic switches. The first electronic switch provides a first level signal to one end of the LED. The second electronic switch switches the third electronic switch on and off. The third electronic switch provides a third level signal to another end of the LED. The regulator adjusts the pulse signal to be at a predetermined frequency to control the first, second, and the third level signals to alternate between a high voltage level and a low voltage level at the predetermined frequency. The LED is driven to be on and off at the predetermined frequency by the first and third level signals. |
