PREPAID ELECTRICITY BILLING SYSTEM USING GSM

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ABSTRACT

The short message system (SMS) of a standard mobile phone can be used for much more than just exchanging cryptic message. This application finds a humble mobile working for controlling external equipments. The SMS service provides by the service providers are comparatively low cost. Hence the system is highly efficient and low-cost.

Mobile phones have become a widespread means of communication. It becomes a part of everyday life with ever more people enjoying the service and extra freedom they provide. It works on the basis of Global System for Mobile Communication (GSM). A subscriber from any systems can access telecommunication services by using a Subscriber Identify Module (SIM) card in a handset suitable for the network on the visited system The Short Message Service allows text messages to be sent and received to and from mobile telephones.

The text can comprise words or numbers or an alphanumeric combination. Because Simple person – to – person messaging is such an important component of total SMS traffic volumes, anything that simplifies message generation as well as extended utility of the SMS being sent is an important enabler of Short Message Service.

We will connect hardware kit i.e. GSM modem and microcontroller to the energy meter. The main aim of this project is whenever u r recharging with some amount say example Rs.100/- by doing SMS to the MODEM, the bulb gets automatically ON until your recharge gets zero. After getting your balance zero your device gets automatically switched OFF and you will get a message from the MODEM that you have to recharge your mobile and the process takes place continuously.

BLOCK DIAGRAM

PREPAID ELECTRICITY BILLING SYSTEM USING GSM

Hardware Used

  • AT command supporting GSM mobile phone.
  • 89c51 Microcontroller
  • Max 232 IC.
  • DB9 Connector
  • GSM Phone

Software Used

   1.    Keil u-Vision

Keil Software is used provide you with software development tools for 8051 based microcontrollers. With the Keil tools, you can generate embedded applications for virtually every 8051 derivative. The supported microcontrollers are listed in the µ-vision.

2.    PRO51 Programmer Software

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JJ

This is Mr.Jose John, 21 yrs old guy, currently pursuing final year mechanical engineering, now become an enthusiastic blogger and a successful entrepreneur.
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Full Report-REMOTE CONTROL BASED HOME APPLIANCES

CONTENTS

  1. INTRODUCTION
  2. PRODUCT DESCRIPTION
  3. FUNCTIONAL BLOCK DIAGRAM                           
  4. CIRCUIT DESCRIPTION
  5. CIRCUIT DIAGRAM
  6. LIST OF COMPONENTS
  7. PCB LAYOUT
  8. PCB FABRICATION
  9. SOLDERING PRACTICE
  10. TESTING
  11. APPLICATIONS
  12. CONCLUSION
  13. DATA SHEETS
  14. REFERENCES

INTRODUCTION

Remote control for home appliances is an absolute necessity in our fast-paced life. As a result, much important has been given to this aspect and a range of remote controls are prevalent today. One of the most common is that which makes use of IR radiations at particular frequencies.

Our product is a Remote Operated Home Appliance or Remote controlled Home appliance. The circuit is connected to any of the home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD, VCR, Air Conditioner or DVD remote control. The circuit can be activated from up to 10 meters. It is very easy to build and can be assembled on a general-purpose PCB.

The circuit essentially consists of a transmitter consisting of a 555 IC, the receiver consisting of an IR module, CD4017 IC, LED’s to indicate the reception of the IR radiations, otherwise indicating the ON/OFF state, relay and other components.

PRODUCT DESCRIPTION

Model Description

Connect this circuit to any of your home appliances (lamp, fan, radio, etc) to make the appliance turn on/off from a TV, VCD or DVD remote control. The circuit can be activated from up to 10 meters. The 38 kHz infrared (IR) rays generated by the remote control are received by IR receiver module TSOP1738 of the circuit. Pin 1 of TSOP1738 is connected to ground, pin 2 is connected to the power supply through resistor R5 and the output is taken from pin 3. The output signal is amplified by transistor T1 (BC558). The amplified signal is fed to clock pin 14 of decade counter IC CD4017 (IC1). Pin 8 of IC1 is grounded, pin 16 is connected to Vcc and pin 3 is connected to LED1 (red), which glows to indicate that the appliance is ‘off.’

CIRCUIT DESCRIPTION

The product consists of a remote which is the transmitter of the IR radiations and the receiver which responds to the radiations and switches ON and OFF the appliance.

Circuit diagram

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JJ

This is Mr.Jose John, 21 yrs old guy, currently pursuing final year mechanical engineering, now become an enthusiastic blogger and a successful entrepreneur.
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Pick and Place Robot

ABSTRACT

 The aim of this article is to get familiarized with the modern field of robotics and to find the technology know -how. Also here we are using the sophisticated emerging technology -embedded system. Here we have designed a robot arm, controlled by a microcontroller. We choose this deign because it is the most common form of robot we can find anywhere in industries like car assembling, bottling plant, packing section etc. The driver circuits for these motors are to be controlled using 8051 microcontroller with a control key panel. The movement is established using stepper motors. pick and place robots are the small robots using for continuous purpose in the industries then let us go through some thing about pick and place robot by this article .

INTRODUCTION

WHAT IS A ROBOT?

Robot is any machine that does work on its own, automatically after it is programmed by humans. HISTORY OF ROBOTS:

The first robot’s name was Electro and his dog’s name was Sparko .They appeared at the New York world’s fair in 1939. While plugged in, Elektro could say 77 words and move backwards and forwards.

In1920’s, Karl Capek from Czechoslovakia introduced the words first    robot on stage.

PICK AND PLACE ROBOT

We are going to design & implement a small model of pick and place robot, which pick and place object any where with in 360degrees and 30 cm diameters around it. The reason for choosing project is, the most extensively form of machine is used in most of the industries like car manufacturing, shipyards, assembling machine etc.

MICROCONROLLERS FOR EMBEDDED SYSTEMS

Microprocessors and microcontroller are widely used in embedded system products.

An embedded system  is a system which is dedicated for a single purpose remains unchanged through out its entire life time. An embedded product uses a microprocessor (or microcontroller) to do one task and one task only.

STEPPER MOTOR:

A stepper motor is a widely used device that translates electrical pulses into mechanical movement. It is used for precise position control. # Increase or decrease the RPM (speed) of it.

To vary the RPM of motor we have to vary the PRF (Pulse Repetition frequency). Number of applied pulses will vary number of rotations and last to change direction we have to change pulse sequence.

 CIRCUIT WORKING

The circuit mainly consists of three modules -control system, user interface module & a high voltage driver. A control system is nothing but the microcontroller. It has got the following modules.

  1. User Interface Module.
  2. Pulse Generator Module.
  3. Timing Control Module.
  4. Output Module.

When the keys are pressed the current flows directly to the ground due to the low resistive path making no more current available to the port pins pulling it down to low state, so when ever the keys are pressed the corresponding pins are pulled down. So normally every pin are at a high state giving a value of 1 when ever the keys are pressed the pins are to the low state giving the value 0.

This change is constantly monitored to check for any user interaction. The microcontroller constantly monitors port 0 for any change in port value and if it finds any change it generates the appropriate control signals. The stepper motor driver circuit consists of two stages-low power switching stage& high power switching stage. The function of the low power switching stage is to boost up the low power signal output from the micro controller to a high power signal so as to drive the power transistor.

Care should be taken while connecting the circuit to the motor as stepper has got a tendency to produce very high reverse current compared to DC motor.

To protect the circuit for this reverse current we have connected a diode in reverse bias across the coil supply so that whenever reverse current is present this diode will sink it protecting the circuit.

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JJ

This is Mr.Jose John, 21 yrs old guy, currently pursuing final year mechanical engineering, now become an enthusiastic blogger and a successful entrepreneur.
Connect with him on:

Facebook Twitter LinkedIn Google+ 

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