![]() ![]() ![]() However, this circuit is not energy-efficient, because energy is dissipated in the resistor as heat.Īn LED has a voltage drop specified at the intended operating current. It is commonly used for indicators and digital displays in many consumer appliances. The simplest circuit to drive an LED is through a series resistor. More complex, current source circuits are required when driving high-power LEDs for illumination to achieve correct current regulation. Very simple circuits are used for low-power indicator LEDs. The voltage drop across an LED is approximately constant over a wide range of operating current therefore, a small increase in applied voltage greatly increases the current. The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). Simple LED (Light Emitting Diode) circuit diagram ![]()
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