Third Eye For Blind Using Ultrasonic Sensor
People with visual disabilities are often dependent on external assistance which can be provided by humans, trained dogs, or special electronic devices as support systems for decision making. The main problem with blind people is how to navigate their way to wherever they want to go. Such people need assistance from others with good eyesight. As described by WHO, 10% of the visually impaired have no functional eyesight at all to help them move around without assistance and safely. This project is designed to help the blind to overcome the lack of visual sense, by using other senses like sound and touch. The system uses Atmega-328 microcontroller, which is a high performance 8-bit AVR RISC-based microcontroller. For sensing the distance the system uses a HC-SR04, an Ultrasonic Range Finder Distance Sensor Module. The sensor module is designed to measure the distance using the principle of SONAR or RADAR, using ultrasonic wave to determine the distance of an object. The system also consists of a buzzer to generate an alarm sound and a motor to generate vibration signals. The system uses audio and vibration signals to notify the user about upcoming hurdle. As the distance between glove and obstacle decreases, frequency of both audio and vibration signals increases. Thus the system helps to ease the navigation process for the needy. This system offers a low-cost, reliable, portable, low power consumption and robust solution for navigation with obvious short response time.