Motion Sensing Main Gate Night Light

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This is a fascinating and valuable project of a “motion-sensing main entrance gate night light” circuit. The circuit will consequently “turn ON” the lights of your main passageways around evening time when anybody comes towards the passage and automatically “turn OFF” the lights when anyone passes on the door. That will spare a great deal of electrical power utilized by the main passage lights.

When an unknown person comes close to the passage around evening time, the lights will turn out to be automatically switched ON so the unknown individual imagines that somebody is watching. We can’t depend on that circuit on the off chance that we need to make an intruder detection system however it can give some assistance.

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Hardware Components

Motion Sensing Light Circuit

S.no	Component	Value	Qty
1.	PIR Sensor Module	–	1
2.	Relay	12 V	1
3.	Lamp	220 V	1
4.	Diode	1N4007	1
5.	Photoresistor	–	1
6.	Transistor	2N3904, 2N4401	1, 1
7.	Variable Resistor	100K	1
8.	Resistor	1K, 470Ω	1, 1
9.	DC Supply	9V-12V	1

2N3904 Pinout

For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N3904

2N4401 Pinout

For a detailed description of pinout, dimension features, and specifications download the datasheet of 2N4401

Motion Sensing Light Circuit

Working Explanation

The circuit is easy to make and does not have many parts. In this circuit, we are using a PIR Sensor Module, a Relay, a 220V Lamp, a Diode of 1N4007, a Photoresistor, two Transistors of 2N3904 and 2N4401, a Variable Resistor of 100K, and Resistors of 1K and 470Ω. The primary component of the circuit is an instant “PIR sensor module” which can be bought from the nearby electronic store. In this circuit, the “Photoresistor” is also an important component which is a passive device used to decrease resistance concerning light.

The relay and PIR module working voltage ought to be as indicated by the working voltage of the circuit. The last working current ought to be 200mA and the working voltage of the circuit is 9V to 12V DC.