Ultrasonic and Infrasonic Devices

Electronics Infoline Web

Ultrasonic Sound Receiver

http://www.circuitos.terra.cl/schem/r113.gif

http://www.mitedu.freeserve.co.uk/Circuits/Misc/whistle.htm

http://circuitos.tripod.cl/schem/r113.gif

movement detector circuit based on ultrasonics.

http://electronics123.com/amazon/datasheet/cps49.pdf

Allows the transducer to oscillate at its self-resonating point, with no tedious setup. the circuit will run on 5V-9V.

http://www.ee.washington.edu/circuit_archive/circuits/F_ASCII_Schem.html#ASCIISCHEM_016

http://www.citycom.gr/electronics/projects/ultrasonic/ultrasonic.htm

http://www.circuitos.terra.cl/schem/r72.gif

http://www.citycom.gr/electronics/downcircuits/89.zip