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Ultrasonic receiver

Discussion in 'General Electronics Discussion' started by himanshu0128, Apr 5, 2016.

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  1. himanshu0128


    Mar 21, 2016
    Hello everyone
    I am making an Ultrasonic Transducer at 40KHz. My transistor circuit has 555 timer IC and couple of transistors to obtain to square pulse of 60% duty cycle with 10Vp-p amplitude. I made a receiver circuit using transistor and some resistors and capacitors, it also works fine upto 30cm. However Now i want to replace that transistor with TL081 Opamp. Pls suggest some circuit to use TL081 as an amplifier at 40KHz with a required gain of atleast 50.
  2. BobK


    Jan 5, 2010
    Look up op amp bandpass filter.

  3. Colin Mitchell

    Colin Mitchell

    Aug 31, 2014
    Just buy it ready-made for $2.50 post free on eBay.
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