Electronic Eye Controlled Security System Circuit

The electronic eye security control system is founded in the year 1997 and base of operations in New Delhi. There are four kinds of organizations under these systems, namely electronic eye Pvt.Ltd, electronic eye systems, Indian institute of science technology and Mahamai Exims. Electronic Eye creates a complete collection of surveillance products and high-tech security. These Systems work on the integration of system and project execution at the customer’s place for numerous surveillance products.

Electronic Eye Security Controlled System

Magic eye or electron eye is one type of electronic device, used to watch continuously if any person is visiting your home. Nowadays, automation is a developing technology. For instance, a doorbell that continuously generates ringtones when an unauthorized person visits your home. This system gives security for homes when any unauthorized person is trying to enter into your home without your consent. This article gives an overview of the electronic eye security control system project and its working.

Electronic Eye Security Control System Circuit Design

The circuit of the electronic eye security control system is separated into two parts such as a logic circuit and power supply. The power supply circuit is designed with a battery, capacitors, P-N junction diode and regulators. Here diode is connected in forwarding bias mode and it protects the circuit from negative voltages. When the battery is connected in reverse polarity, there is a chance of circuit damage. So the diode is connected in the forward bias, which allows the flow of current in only one direction. The voltage across the diode is 0.7V.

A voltage regulator (IC 7805) is used to regulate the o/p voltage of the circuit. Here 05 denotes the o/p voltage and 78 denotes the series. Thus 5 volts is generated at the o/p of the voltage regulator. To eliminate the ripples two capacitors are connected before and after of the voltage regulator. Thus the voltage which is generated from the voltage regulator is applied to the logic circuit.

The logic circuit is built with LDR, an operational amplifier, transistors, and a buzzer. A 220-kilo ohm resistor and an LDR are connected in series. When the LDR is placed in a dark place, the resistance of the LDR will increase. In the same way, when it is placed in the light, then the resistance will decrease. Thus, there is a change in the series resistances. When the LDR is in the dark, then it has high resistance value and generates the logic high value at the o/p. When the LDR is in light, then it has low resistance value and generates the low logic value.

The IC LM358 consists of two inputs and one output which is applied to the transistor. Two transistors are connected to the buzzer. The first transistor reverses the input from the IC. The second transistor runs the buzzer and the diode is used for the protection.

The buzzer used in this circuit has two pins, where one pin is connected to the NOT gate and the remaining pin is connected to the LED. When the o/p of the gate is high, then the buzzer starts ringing and LED also blinks.

Block Diagram of Electronic Eye Security Control System

The block diagram of the electronic eye security control system mainly includes Battery, Slide switch, LDR, Ripple Counter IC, Transistor, Buzzer, Relay, Bulb, Diode, Transformer, Capacitor, and Resistor. The main principle of this Electronic eye security control system project is to give a buzzer when there is any person at the door entrance. When the light falls on the LDR tells whether a person at the door entrance is present or not. Whenever there is any object placed at the entrance of the door, the light-dependent resistor is in dark and gives the buzzer and the LED starts blinking.

Project Description

The main concept of this project is to design an Electronic Eye Security Controlled System for homes and public places like banks, malls, etc. This project uses an LDR sensor to sense the intensity of light and produces an alarm for representing thefts, and also switches ON the lights.

This electronic security system is placed inside lockers and cash boxes in such a way that if an unauthorized person tries to open the locker door and uses a torchlight to find valuable things. The torchlight falls on the electronic eye gives a signal to the buzzer.

This project can be designed to secure lockers and cash boxes where security is needed like homes, banks, etc. This project uses a 14-stage-ripple-binary counter to detect the intensity of light through the light-dependent resistor. The relay driver is connected with the binary counter to control the different loads. The buzzer is attached to the circuit using a transistor to give an indication to the users.

Whenever an intensity of light falls on the LDR then the resistance of this LDR will decrease, and thus, the ripple counter triggers the transistors. Also, these transistors trigger the buzzer and load connected to the relay to indicate a theft.

Furthermore, this Electronic eye security control system project can be enhanced by using a microcontroller and a GSM modem. The GSM based home security system can be interfaced with the microcontroller to send & receive an SMS to the authorized person in case of robbery.

Therefore, this is all bout electronic eye controlled security systems using LDR, and the applications of this project mainly include doorbell circuits, garage door opening circuits and security applications. We hope that you have got a better understanding of this concept or electronics projects, please give your valuable suggestions by commenting in the comment section below. Here is a question for you, why electronic eye security system is used for?