pypilot store open again

[ironman]

Ive seen that project but not sure it will really work that well given the design choices.

As for 80cm,  is a challenge.  Especially if the transducer is at this depth and only a few cm from the bottom.

By the time the pulse is received, the transducer is still ringing from transmit, so it is hard  to measure.

My boat draft is 60cm, I will be trying also at shallow depths,  I think it might have to detect depth an adjust pulse length, perhaps use active dampening and so on.

Despite this other depth sounders I have used can measure below 1 meter depth so not sure exactly what you are doing.

Interested to here what design choices you have issues with? I run an open echo device on my yacht and it works perfectly (I have personally tested down to about 20m, I know others have seen down to 40+ but I have not been anywhere that deep recently). It even works with either of my on board transducers, a 1970s 150kHz and an early 2000s 192kHz, both of which are bonded to the hull.

My 150kHz has a very small ringdown, around 30cm at the voltage I am driving it at (~30V), so would work well for a shallow draft like yours I guess?

So you say the smaller the voltage, the smaller the ringdown, and the shallower the depths that can be measured?