SMS and Microcontroller based Smart Home Controller

SMS and Microcontroller based Smart Home Controller
The objective of this project is to improve the security performance in the house and to control the home appliances through mobile. This project is designed with Microcontroller, Flame sensor, Gas sensor, IR transmitter and receiver, signal conditioning unit, RS 232, and Data cable with mobile.
Flame sensor is the one type of transducer which is used to sense the flame. If any fire happens in the house the flame sensor will detect that one and send the signal to microcontroller through signal conditioning unit. Gas sensor is also one type of transducer which is used to sense the gas leakage in the house. If any gas leakage in the house it will sense that leakage and send the signal to microcontroller to signal conditioning unit.
Infrared transmitter and receiver are fixed in the entrance door. Initially the infrared transmitter transmits the rays to the receiver. If any one crosses the rays it sends the signal to microcontroller through the signal conditioning unit. Similarly the door breaking sensor is fixed in the entrance door. If any person breaks the door, the sensor will detect the vibration and send the signal to microcontroller through signal conditioning unit.
The signal conditioning unit is constructed with operational amplifier which acts as comparator. It receives the signal from all above mentioned transducer and generates the square pulse. Then this square pulse is given to microcontroller. Here the microcontroller may be Atmel or PIC both are flash type reprogrammable microcontroller in which we have already programmed with desired phone number.
The mobile phone is interfaced with microcontroller through data cable and RS 232. RS 232 converts TTL logic to RS 232 logic. If any one transducer is activated due to that corresponding microcontroller sends the related information to the mobile phone. The mobile phone sends this information as SMS to desired phone as per the phone number stored in the microcontroller.

ULTRASONIC RANGE DETECTOR USING PIC

ULTRASONIC RANGE DETECTOR USING PIC

The Ultrasonic range meter detects a reflected wave from the object after sending out an ultrasonic pulse. By measuring the time which returns after emitting a sound wave, a distance to the object is measured. This range meter uses the ultrasonic frequency of about 40 kHz. The way of measuring measures the time which the ultrasonic returns from the measurement object. The transmission period of the ultrasonic is controlled using timer. All of those controls are done by the software of PIC16F873. When using the capture feature of PIC, this circuit is not indispensable. The sound wave propagation speed in air is changed by the temperature. At 0 deg., it is 331.5 m per sec. At 40 deg., it is 355.5m per sec. From the time measured, the distance of the object can be calculated using the relation between speed and distance. We make use of ultrasonic sensors to perform distance measurement. This sensor separates into the two kinds for the transmitter and the receiver. In this measurement the range of the Ultrasonic Range Detector can be increased to find many applications in various fields

REAL TIME BIOMEDICAL MONITORING SYSTEM

REAL TIME BIOMEDICAL MONITORING SYSTEM

The conventional methods to monitor the heartbeat has number of issues to deal with. Even the commercial wireless technology being employed has more complications and is offline. In this project, a generic real-time wireless communication system has been designed and developed for short and long term remote patient-monitoring applying wireless protocol. The primary function of this system is to monitor the temperature and heart beat of the patient and the data collected by the sensors are sent to the microcontroller. The microcontroller transmits the data over the air. At the receiving end a receiver is used to receive the data and it is decoded and fed to microcontroller, which is then displayed over the LCD display. If there is a dangerous change in patient's status an alarm is also activated.

ADAPTIVE TRAFFIC CONTROL

ADAPTIVE TRAFFIC CONTROL

An adaptive traffic control system was developed where the traffic load is continuously measured by loop detectors connected to a microcontroller-based system which also performs all intersection control functions. Intersection controllers of an area are interconnected with a communication network through which traffic load and synchronization information is exchanged. As a result, the duration and relative phases of each traffic light cycle change dynamically. The new architecture is completely distributed and eliminates the need for a central computer to individually control traffic lights. For the basic function of the system only the intersection controllers are required. The connection of the central computer is needed only for system surveillance and for traffic data collection and storage.

SMART ENERGY METER WITH MICRO CONTROLLER

SMART ENERGY METER

Energy meter, the only direct revenue interface between utilities and the consumers, have undergone several advancements in the last decade. In this project we provide a scheme of electricity billing system called "SMART ENERGY METER" which reduces the problems associated with billing consumer living in isolated area and reduce the man power for taking meter readings. The consumer has to just insert the memory card of desired amount into the card reader and the amount will be detected depending upon the consumption. Microcontroller acts as the primary controller and collects information from the energy meter and the smart card. It then compares both the information and controls the relay accordingly. The relay is connected between the power lines and the load. If the available credit is exhausted, the supply is automatically cut off by the relay. As a future enhancement, the clients can be networked and the whole power supply control can be given to the server in the electricity board.

PIC-BASED PATH FINDING METAL DETECTOR ROBOT

PIC-BASED PATH FINDING METAL DETECTOR ROBOT

Abstract

One of the biggest challenges in constructing a robot lies in the control of its motors. In this project we use a PIC 16F84A microcontroller to control the stepper motors of the wheels.

The robot is mounted on a three motorized swedish or spherical wheels arranged in a triangle to make omnidirectional movement possible. Two target points are initially taken and the robot is made to move towards one of them depending on the input selection. An array of proximity sensors are used for detecting the obstacles.

By controlling the stepper motors, the robot is made to move in a tangential direction to the obstacle. The algorithm is written in such a way that the microcontroller checks the proximity sensors after a specified time delay. This is done in order to maneuver the robot again towards the target. This subroutine is employed whenever an obstacle is encountered till the robot reaches the target point.

A metal detector is mounted on the robot to detect the metals present in the way. This robot is used in various industrial applications such as terrestrial, underground and space explorations, navigation in hazardous environments and in military operations. Enhancements can be done by adding a series of modules on this robot for other specific purposes.