Guided by:
Ms. Monika Sharma

Prepared by:
Akshay Patel
Rohan Shah


Introduction:

A stepper motor (or step motor) is a brushless, synchronous electric motor that can divide a full rotation into a large number of steps.
Stepper motors are similar to switched reluctance motors (which are very large stepping motors with a reduced pole count, and generally are closed-loop commutated.)

Fundamentals of operation


Stepper motors operate differently from DC brush motors, which rotate w ....etc

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Electronic code lock using 8051 Microcontroller
An Electronic Code Lock is a device which has an electronic control assembly attached to it. They are provided with an access control system. This system allows the user to unlock the device with a password. The password is entered by making use of a keypad. The user can also set his password to ensure better protection. The major components include a keypad, LCD and the controller AT89C51 which belongs to the 8051 series of microcontrollers. This article describes the making of an electro ....etc

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Microcontrollers (MCU) are complete computer systems on a chip. They combine an arithmetic logic unit (ALU), memory, timer/counters, serial port, input/output (I/O) ports and a clock oscillator
Circuit breakers are mechanical switching devices capable of breaking currents under specified abnormal circuitconditions
A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault con ....etc

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CHAPTER 1
OVERVIEW OF 8051 MICROCONTROLLER
1.1 DESCRIPTION:
The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of
Flash programmable and erasable read only memory (PEROM). The device is manufactured
using Atmel’s high-density nonvolatile memory technology and is compatible with the industrystandard
MCS-51 instruction set and pin out. The on-chip Flash allows the program memory to
be reprogrammed in-system or by a conventional nonvolatile memory programmer. By
combinin ....etc

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Present project is designed using 8051 microcontroller to avoid railway accidents happening at unattended railway gates, if implemented in spirit. This project utilizes two powerful IR transmitters and two receivers; one pair of transmitter and receiver is fixed at up side (from where the train comes) at a level higher than a human being in exact alignment and similarly the other pair is fixed at down side of the train direction. Sensor activation time is so adjusted by calculating the time taken at a certain speed to cross at least one compart ....etc

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Contents:
Introduction
Block Diagram and Pin Description of the 8051
Registers
Memory mapping in 8051
Stack in the 8051
I/O Port Programming
Timer
Interrupt

Why do we need to learn Microprocessors/controllers?
The microprocessor is the core of computer systems.
Nowadays many communication, digital entertainment, portable devices, are controlled by them.
A designer should know what types of components he needs, ways to reduce production costs and product reliable.

Different aspect ....etc

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ECTION USING 8051
MICROCONTROLLER

Flame detection using 8051 microcontroller is an embedded system application which can perform task of detecting fire and temperature to prevent disasters without continuous human monitoring. The behavior of this system is based on LDR sensor information. It uses LDR and LED which gives input to microcontroller by means of sensing. When the system is powered-on, it detects the Light by using LDR, based on this the microcontroller LED is glowed. ....etc

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1. GPS and microcontroller based location (latitude and longitude) display On lcd display
2. Infrared Remote controlled High Voltage device switching with Electromagnetic Relay
3. GPS speedo meter with Over speed alert system.
4. Wireless split AC blower and compressor control system.
5. Automatic room light intensity based window blinds control system.
6. Digital Frequency Meter with LCD Display
7. Microcontroller based GPS Clock. It maintains accurate time based on the signals received from the satellites.
8. Digital Energy Meter LCD ....etc

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Submitted By:
MANISH SHARMA


OPAMP APPLICATION, INTERFACING LCD & ADC7829 WITH 8051 MICROCONTROLLER at LASTEC, DRDO
vision, Mission & Values of LASTEC
VISION:
Be the Centre of Excellence in the field of Lasers and Opto-Electronics.
MISSION:
Develop and deliver directed energy weapon systems for the services. Carry out advanced research in the field of Lasers, Photonics and Opto-Electronics.
The Laser Science And Technology Centre had its beginning in 1950 as the Defence Science ....etc

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track railway gate controlling using 8051 microcontroller

abstract


the project designed for single track railway gate controlling using 8051 microcontroller to avoid railway accidents happening at unattended railway gates. This project utilizes two powerful IR transmitters and two receivers; one pair of transmitter and receiver is fixed at side from where the train comes at a level higher than a human being in exact alignment and similarly the other pair is fixed at down side of the train direction. Sensor activation time ....etc

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