This looks very cool!<p>I've just been looking at your github repository, you mention you use the HV7360 chip to generate the ultrasound pulse.<p>I'm slightly confused by the datasheet for this chip, am I right in thinking you supply +/- 100V to this chip? If so, what are you using to generate that voltage out of curiosity?<p>(I have a ~2MHz ultrasound transducer which I keep meaning to play with, to attempt to measure liquid density, so your project is very interesting to me!)