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ultrasonic receiver

Discussion in 'General Electronics Discussion' started by himanshu0128, Apr 13, 2016.

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  1. himanshu0128

    himanshu0128

    10
    0
    Mar 21, 2016
    Hey Guys..
    I am designing an ultrasonic receiver using op amp TL081 but my detection range is very less ; approximately 30cm..Please can anyone tell me how to increase the range..If i increase my op amp gain, noise level also increases and thus it doesn't help.
    Thank you
     
  2. davenn

    davenn Moderator

    13,598
    1,875
    Sep 5, 2009
    hi there

    start by showing us your circuit
     
  3. himanshu0128

    himanshu0128

    10
    0
    Mar 21, 2016
    receiver.PNG
    this is the receiver circuit. It is working fine up till 6 feet. but at a distance of less than 5cm, the output voltage is saturating(25+), while at maximum distance( 6 feet), the output voltage is 3V..Now my doubt is:
    1). How to increase the range of this circuit if possible.?
    2). How to automatically control the gain so that my output voltage at less distance doesn't saturate while at more distance, it receives an appreciable output voltage.
    3). I am planning to interface this circuit with an arduino uno for LCD display. pls help me with the same..
     
  4. Colin Mitchell

    Colin Mitchell

    1,417
    312
    Aug 31, 2014
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