How to Turn ON and OFF street light automatically using Transistor 13003ED and LDR?
Автор: Circuit Design By Abdul Waheed
Загружено: 2023-07-18
Просмотров: 485
Описание:
#night_switch
#ldr_based_switch
#street_light_switch
In this video I used two Transistors 13003 ED and LDR to make this circuit.Both Transistors are used in switching mode.At base of first Transistor I made a potential divider circuit using a variable resistor and LDR.LDR (Light Dependent Resistor) plays an important role.When there is darkness around the LDR then it's resistance increases and base to Emitter voltage increases which causes a current from collector to Emitter.This current Turn ON the second transistor which activated the relay and consequently Lamp start glowing.In presence of Light LDR drops it's resistance and both transistors remains in Cutoff mode and no current flows from collector to Emitter.
You can make this circuit by using following components.
1.Breadboard/PCB
2.12. V relay
3.2 LEDs (Red,Green)
4.2x220 Ohm Resistors
5.1x100K Potentiometer
6.12 Volt Lamp
7.LDR (Light Dependent Resistor)
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