View
5.983
Download
1
Category
Tags:
Preview:
Citation preview
Microcontroller based Electronic Walking
Stick for Blind
By-Manav Mittal (07211503009)
Gunjan Saluja (07311503009)Surabhi Garhwal (09311503009)
Introduction
Presently, blind people use a white stick as a tool for directing them when they move or walk.
Here, we develop a tool which can serve as a blind stick being more efficient and helpful than the conventional one.
BASIC LOGIC
• Five different sensors with microcontroller interface are used.
• IC 89s51 as the main microcontroller is used.
Components
• Microcontroller 8951• Sensors• Remote• Buzzer
LDR
CON
TRO
L U
NIT
BLOCK DIAGRAM
LDR INPUT
INFRARED SENSOR INPUT
REMOTE SENSOR
THERMISTOR
WATER SENSOR
BLIND STICK WITH SENSORS
8951 Microcontroller
• Advance version of 8051
• Two types of 8951 are available-1. 89s512. 89c51
Sensors used-
• Temperature Sensor• Light Sensor• Infrared Sensor• Water Sensor
Light Sensor
Infrared Transmitter and Receiver
In the interruption mode we use one infra red led and photodiode in pair.
Temperature Sensor
• Thermistor is used• In case of high
temperature, the circuit is activated and the buzzer rings.
Water Sensor
•Impedance Moisture sensors are used.•For the water sensor we use two metallic plate under the stick ,when water touches on this stick then buzzer is on.
Remote Sensor
•TSOP 1738 sensor is used.• Photo Detector and preamplifier in one package.• Improved shielding against electric field disturbance.
Thank You !!
Recommended