PASSWORD BASED DOOR LOCKING SYSTEM USING 8051 MICROCONTROLLER

PRESENTED BY…….. PRASHANTMANGLESHWARMRADULNARENDRAEC-B 4th YEAR

MENTOR:SHIV SIR

CONTENTS INTRODUCTION HARDWARE REQUIRED SOFTWARE REQUIRED CIRCUIT DIAGRAM STEPPER MOTOR CRYSTAL OSCILLATOR VOLTAGE REGULATOR MOMENTARY SWITCH LCD ADVANTAGES APPLICATIONS

INTRODUCTION A microcontroller based Door locker is an

acecess control system that allows only authorized persons to access a restricted area.

The system has a Keypad by which the password can be entered through it. When the entered password equals with the password stored in the memory then the gate gets open. If we entered a wrong password then the Alarm is switched on.

HARDWARE REQUIREMENTS: AT89C51 CONTROLLER 8051 PROGRAMMING BOARD PROGRAMMING CABLE DC BATTERY OR 12V,1A ADAPTOR 4×3 MATRIX KEYPAD 16×2 LCD 5V RELAY DC MOTOR BC 547 TRANSISTOR 10K, 330 Ω RESISTOR (1/4 WATT) 10UF ELECTROLYTIC CAPACITOR 33PF CAPACITORS – 2 12MHZ CRYSTAL POT 10K (1/4 WATT) – 1 CONNECTING WIRES

Software Requirements: Keil compiler Flash magic Proteus

CIRCUIT DIAGRAM-

STEPPER MOTOR

A stepper motor or step motor or stepping

motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor.

CRYSTAL OSCILLATOR

A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.

VOLTAGE REGULATOR

A voltage regulator is designed to automatically maintain a constant voltage level.

Depending on the design, it may be used to regulate one or more AC or DC voltages.

MOMENTARY SWITCH

In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.

The mechanism of a switch may be operated directly by a human operator to control a circuit.

LCD

A liquid-crystal display (LCD) is a flat panel display, electronic visual display, or video display that uses the light modulating properties of liquid crystals. Liquid crystals do not emit light directly.

Advantages: This project provides security Power consumption is less Used commonly available components Project is simple and easy

Applications: This simple circuit can be used at residential

places to ensure better safety. It can be used at organizations to ensure

authorized access to highly secured places. With a slight modification this Project can be

used to control the switching of loads through password

Thank You