thanks friend for replying every time. I am designing a system for blind person. i am using ultrasonic detector. when any obstacle in range of ultrasonic, vibrator will works and person get response even in noisy environment.
thanks friend for replying every time. I am designing a system for blind person. i am using ultrasonic detector. when any obstacle in range of ultrasonic, vibrator will works and person get response even in noisy environment.