Simple PIR Motion Sensor Doorbell with 2N4401 Transistor

In this tutorial, we are demonstrating the project of the “Simple Motion Sensor Doorbell”. Motion Sensor Doorbell is the essential development of the home security arrangement. All things considered, this extra layer of security gives you the opportunity to make yourself and your family members safe from robbers, bulgers, thieves, or any “unauthorized person” who wants to harm you and your family.

With this basic motion sensor circuit, you can turn your home doorbell into a programmed doorbell that will initiate automatically when a guest or anyone comes near your door. Motion Sensor Doorbell is the best way to secure your home, office, or any place as it alerts you whenever any person approaches your door.

Hardware Components

The following components are required to make a Motion Sensor Doorbell Circuit

2N4401 Pinout

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

Motion Sensor Doorbell Circuit

Working Explanation

Under this heading, we will elaborate on the circuit of the “Simple Motion Sensor Doorbell”. The circuit utilizes a few parts, which can be easily bought from your nearest electronic store. The components are one relay switch, one resistor of 470Ω, a 2N4401 transistor, a 1N4007 diode, and an instant “PIR sensor module”. The PIR Sensor Module is the main component of this project which can be used in many types of “Automatic Induction Electrical Equipment”.

The working voltage of the circuit is 12V DC however it can likewise be worked with lower voltages, for instance, 5V or 6V DC. For working the circuit with 5V or 6V DC the relay value and PIR module working voltage must match the working voltage.

Applications and Uses

The circuit of the Simple Motion Sensor Doorbell is used for protecting your house or office from thieves, bulgers, robbers, or any unauthorized person who wants to harm you and your property.