Introduction to a "Magic Pen"

Recorder is this magic pen that converts your written notes into electronic files and then transfers it to your phone and computer via "Bluetooth". I think it’s a great idea and can actually encourage us writers to take to the book and pen more often. I bet authors and illustrators will love it too! My only wish – it auto spell checks the files..... great invention..

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Hello Friends !!! Recorder is this magic pen that converts your written notes into electronic files and then transfers it to your phone and computer via "Bluetooth". I think it’s a great idea and can actually encourage us writers to take to the book and pen more often. I bet authors and illustrators will love it too! My only wish – it auto spell checks the files..... great invention..

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Walking Stick with Heart Attack Detection

FOR FINAL YEAR STUDENTS
Walking Stick with Heart Attack Detection

ABSTRACT:

The ECG circuitry unit on the wrist captures abnormal heart beat signal from the patient. The micro controller on the stick runs a heart attack algorithm. Warning is given out to the person about his heart condition. The Bluetooth emergency calling system calls for medical help at the moment of heart attack.

FUNCTIONING OF THE SYSTEM:

This project aims to shorten the time between the moment of heart attack and the arrival of medical personal. The warning before the emergency call will give the patient a chance to avoid heart attack.

Two biosensors worn on the user’s wrists send the real ECG signal to the analog ECG circuitry. The amplified and filtered analog output of the circuitry is converted from analog to digital signal and transmitted to the unit on the walking stick. The ECG circuitry unit, the A/D converter, and the transmitter are worn on one of the user’s wrists. The wireless connection between the unit on the wrist and the main unit on the walking stick gives the user more freedom to move by avoiding wire attachment between the wrist and the stick.

The receiver on the stick receives the digital ECG signal, and the microcontroller runs a heart attack algorithm to detect possible heart attack symptoms. If any symptom of heart attack is detected, the risk level rises. When the risk level reaches up to the emergency mode, the Bluetooth module activates the user’s mobile phone to call 101 for medical help.

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INTRODUCTION OF BLUETOOTH

Introduction of Bluetooth
Bluetooth is a low-power,short-distance radio technology, originally developed as a cable replacement to connect devices such as mobile phone handsets,headsets and portable computers. Bluetooth uses frequency spectrum in the range of  2400 MHz to 2483.5 MHz. Bluetooth allows both time critical data communication like voice and audio,as well as high speed,time insensitive packet data communication. Data rate via Bluetooth connection can be up 723.2 kbps. Each Bluetooth device has a unique-48-bit IEEE MAC address known as the Bluetooth device address (BD-ADDR) that is used to identify a Bluetooth device. This address cannot be easily changed by the end-user.Because Bluetooth is designed for low-powered portable applications, the radio power must be minimized.
           Files can be transferred between two Bluetooth devices using OBEX (Object Exchange) file transfer. OBEX is binary protocol designed to allow a variety of devices to exchange data simply and spontaneously. Briefly, OBEX defines a session protocol that is used to send request from a client to a server. The server replies with responses.When one Bluetooth device wants to download files from another Bluetooth  device, it first searches if the other device is in range. On success, a Bluetooth connection will be set up between two devices.After the connection is set up, the file can be transferred from source to destination by using OBEX protocol if in both devices OBEX is implemented. The Bluetooth radio is the lowest of  Bluetooth communication.
           Bluetooth devices are divided into three power classes; the only difference between them is the transmission power levels used. Table 1.1 summarizes their differences among the power classes of Bluetooth. Almost all Bluetooth-enabled cell phones,headsets,laptops,and other consumer-level Bluetooth devices are class 2 devices. There are many class 1 USB devices for sale to consumers. It is the higher class that determines the properties. If a class 1 USB device communicates with a class 2 Bluetooth cell phone, the cell phone limits the range Bluetooth radio. Class 3 Bluetooth device are rare, as their limited range heavily restricts their usefulness.

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BASICS OF ZIGBEE AND BLUETOOTH

BASICS OF ZIGBEE AND BLUETOOTH

ZIGBEE:

The name ZIGBEE is said to come from the domestic honeybee,which uses a zigbee type of dance to communicate important information to other hive member.
ZIGBEE technology is a low data rate, low power consumption, low-cost, wireless networking protocol targeted towards automation and remote control applications.

BLUETOOTH:

Bluetooth aims at connectivity of mobile devices in close. It uses higher data rates,higher power consumption on large packet-device.
In Bluetooth, the network range is small and its longer join time is detrimental(3-sec).
Bluetooth has a network range of 1 to 10 meters and has a protocol stack size of 250 kilo-byte and its batteries are rechargeable.

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