Description
A light-emitting diode (LED) is a semiconductor light source that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy in the form of photons. The color of the light (corresponding to the energy of the photons) is determined by the energy required for electrons to cross the band gap of the semiconductor.









Spanner Set
Buzzer Big 5V
PIR Motion Sensor Module
Hookup wire Roll/ Connecting wire roll
Allen Key Set
Metal Touch Sensor Module
Electrical Wire Roll
Sound Sensor Module
Ultrasonic Sensor Module HCSR-04
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