In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

Patience isn't your long suit, is it? (not mine either, truth be told)   

The obvious answer is that it CAN be done, Parallax uses an SX in their Ping))) sensor.  As I recall that took the engineer a month or two of serious work; you're probably not going to get a ready-made answer by making a post here.  Google is your friend; perhaps a search will turn up circuit using another micro that you can adapt (I do this all the time).

I believe there is an old BS1 app note that shows how to build a such a device, but it uses a 555 to modulate the sensor and a 567 to do the demodulation.

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