PIR Controlled Shop Bell Circuit Diagram

Introduction

Shop bells have been an integral part of retail stores for years. They help alert the store owner or employees when a customer enters the store. However, traditional shop bells can be too loud, annoying, or not suitable for certain environments. In such cases, a PIR Controlled Shop Bell is an excellent idea. It is quieter; it only rings when someone approaches the sensor and is perfect for stores or locations where you don’t want a loud bell ringing all day.

This article will detail how to make a PIR-controlled shop bell using 4013, CNY65, 4093 ICs, and BC517 transistor. These components are readily available and affordable.

Circuit Diagram of PIR Controlled Shop Bell

The circuit can be designed using a few basic components. The circuit diagram for the PIR-controlled shop bell using 4013, CNY65, 4093 ICs, and BC517 transistor, is shown below:

**PIR Controlled Shop Bell Circuit Diagram**

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Components of PIR Controlled Shop Bell

The following components are required to make the shop bell circuit:

4013 IC – Dual D-type flip flop
CNY65 IC – Optocoupler
4093 IC – Quad 2-input NAND Schmitt trigger
BC517 Transistor – PNP Transistor
12 Volt Piezo Buzzer
1N4001 x 3
1N4148 x 2
10nf capacitor
100nf capacitor
180nf / 630v capacitor
470nf capacitor
1uf capacitor
Resisters
PIR Sensor

Explanation of PIR Controlled Shop Bell

What is a PIR sensor?

PIR stands for Passive Infrared Sensor. It is a sensor that detects infrared radiation given off by people and animals. PIR sensors are widely used for motion detection in security systems, turning lights on and off, or even heating and cooling systems. In this project, a PIR sensor will be used as the trigger for the shop bell.

Working of the circuit:

The PIR sensor is connected to the 4013 IC, which is a dual D-type flip flop. When the PIR sensor detects motion, it sends a signal to the 4013 IC, making pin 12 high. This signal is then sent to the 4093 IC, which is a quad 2-input NAND Schmitt trigger. This IC is used to generate a square wave, which will be sent to the BC517 transistor.

The 4093 IC generates four square waves, but the fourth wave is used in this project. The fourth wave is sent to the BC517 transistor as it acts as a switch. When the fourth wave from the 4093 IC is received by the BC517 transistor, it will trigger the buzzer.

The CNY65 IC is used to isolate the 4093 IC and the BC517 transistor. This IC prevents any electrical interference from other components in the circuit.

Conclusion:

The PIR Controlled Shop Bell is ideal for use in retail stores or areas where you don’t want a loud noise when customers enter. The circuit is easy to build by anyone with basic electronics knowledge. Using 4013, CNY65, 4093 ICs, and BC517 transistor, the shop bell can be made and customized as per requirements. By using a PIR sensor, the bell will only ring when someone approaches the sensor, making it more efficient and suitable for the environment. It’s a cost-effective and straightforward solution that you can implement in your store today.