7/24/2019 Blind Assi

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The signal from the sensor travels and falls on the Obstacles and reflected back.

The microcontroller counts the time taken between the transmission and the

receiption and thus calculates the distance. If there is obstacles in front of them,

it produces a warning signal. This warning is played as a recorded message. Thus

the user can easily identify the obstacles in front of him. System can also detecta water pit in front of the user.