Light-Emitting DiodesLight-emitting diodes (LED) also act like standard diodes, they only allow current in one direction;however, a LED can emit visible or infrared light.A typical LED can only handle about 0.030A of current without burning out. A typical LED will dropanywhere from 1.5V to 3.0V when in a live circuit. This means that there also needs to be a series resistor ina LED circuit to limit the current and drop any remaining voltage above what the LED can drop.The short lead and the flat side of the LED bottom case represent the cathode of the LED.LED Tail lamps and brake lamps.LED's have several advantages over conventional incandescent light bulbs:
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