Using 3 modified hc-sr04 to triangulate the position of one or more objects

[anon57585045]

@ardcp

Looking at the output of the receiver using an oscilloscope, there many more than 5 pulses.
Probably due to the transmitting transducer oscillating even after the pulse train has finished.

Not to mention the numerous pulses bouncing around the room... also if the receiver has a high Q factor it will resonate itself.