What Is an LED Circuit?
An LED circuit is any electrical power circuit used to power light-emitting diodes, or LEDs. At its simplest, an LED circuit comprises a voltage source, a resistor to reduce the voltage, and an LED. The LED circuit may contain other components too, such as switches and sensors, but these don’t affect the basic principles involved in powering an LED. LEDs are cheap, reliable, robust, and energy efficient. The LED circuit has become a common feature in electronic devices, automobiles, and appliances, where they serve as indicator lights and for minor illumination. Larger LEDs have been developed that have home applications, and these will no doubt become more important in the future, but this discussion will concentrate on the elements of a the LED circuit as it applies to smaller LEDs.
