Basic Electronics Engineering Lab-05

Jul 11th, 2016
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Objective To become familiar with characteristics and use of a light emitting diode (LED) and Zener Diode.

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International Islamic University,IslamabadDepartment of Mechanical EngineeringBasic Electronics LABEXPERIMENT # 05: LIGHT-EMITTING & ZENER DIODEName of Student: ..Roll No.: Date of Experiment: ..Report submitted on: ..Marks obtained: Remarks: Instructors Signature: ...Basic Electronics Lab (EE-301L)LIGHT-EMITTING & ZENER DIODE1. ObjectiveTo become familiar with characteristics and use of a light emitting diode (LED) and Zener Diode.2. Equipment RequiredOscilloscopeDMMFunction GeneratorPower SupplyResistors (1) 100- (2) 220- (1) 330- (1) 2.2-k (1) 3.3-k (2) 1-k Diode (1) Silicon (1) LED (1) Zener THEORYThe light emitting diode (LED) is, as the name implies, a diode that will give off visible light whensufficiently energized. When the diode is forward biased, electrons from the semiconductors conduction bandrecombine with holes from the valence band releasing sufficient energy to produce photons which emit amonochromatic (single color) of light. Because of this thin layer a reasonable number of these photons canleave the junction and radiate away producing a colored li

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