Quantity   Component name
1 × Analog processing board (tobo) Gerbers and such at https://github.com/kelu124/echomods/tree/master/tobo
1 × pulser board (goblin) Gerbers and such at https://github.com/kelu124/echomods/tree/master/goblin
1 × a 3.5MHz transducer salvaged from ebay old mechanical transducers or bought anew from our supplier
1 × trinket pro a small arduino-like to manage the pulse
1 × a feather WICED (or any 6Msps microcontroler) To acquire and stream the data
1 × basic electronics cables, stripboards, alims, ...