This application is a simple-to-use calculator that calculates the resistance of a resistor in a LED circuit. The simplest circuit to turn on a LED is a voltage source with a resistor and LED in series. The purpose of the resistor in a LED circuit is to limit the current flow through the LED and prevent that it burns. Therefore, it is important to use a suitable resistor for the LED circuit. This application helps the user by picking the ideal resistor for the LED circuit! LED A LED (Light Em