Uctronics Raspberry Pi User Manual

www.uctronics.com
15
L. Red, Green, Yellow, Blue LEDs
Light Emitting Diode (LED) LEDs are solid state devices that emit light when electricity
passes through them. They are directional and need to go in the circuit the right way
around.
Once a certain “on” threshold voltage is reached (about 2V for a red LED) the current
through an LED rises very quickly with the voltage. In most applications, a resistor is
needed to protect the LED from being overloaded due to this effect.

Uctronics Raspberry Pi Specifications

General

Brand	Uctronics
Model	Raspberry Pi
Category	Motherboard
Language	English