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Circuits designed by David Johnson, P.E.
Last Updated on: Thursday, April 07, 2016 02:04 PM

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Acoustic Circuits

40Khz Ultrasound Receiver  -  A X100 transistor Amplifier is followed by a zero cross detector circuit, using a voltage comparator.  The output is a TTL logic signal, corresponding to the received 40KHz signal . . . [Circuit by David A. Johnson P.E.,  01/29/06]


40Khz Ultrasound Transducer Driver uses Medium Power  -  This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal . . . [Hobby Circuit designed by David A. Johnson P.E.,  01/29/06]

 


Medium Power 40Khz Ultrasound Transducer Driver  -  This crystal controlled circuit drives a 40KHz piezo transducer with a 30v peak to peak signal . . . [Circuit by Dave Johnson P.E.,  01/29/06]


Ultrasound Receiver-40Khz  -  A X100 transistor amplifier is followed by a zero cross detector circuit, using a voltage comparator.  The output is a TTL logic signal, corresponding to the received 40KHz signal . . . [Hobby Circuit designed by Dave Johnson P.E.,  01/29/06]


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