How to Select a Resistor for an LED

Circuitrocks "LED, Resistor, and Switch in Series: Quick Guide" To try making a simple electronic circuit, you can connect an LED, a resistor, and a switch in a series. This setup is easy to assemble and teaches you how electrical components work together as a system. First and foremost, I want to highlight the LED which is an acronym for Light Emitting Diode. The LEDs are unique due to the fact that they only glow when an electric current passes through them, but the current must be in a certai