the up5k lit3rick open hardware ultrasound pulse echo board, with -28dB to 92dB gain

OSHWA certified !

https://certification.oshwa.org/fr000016.html

Presentation of the hardware

• Lattice: up5k. Onboard RAM for 64k points saves. (128kB onboard RAM)

• Onboard flash

• Pulser : HV7361GA-G:

  • Can manage +-100V pulses. Onboard is 5V pulse.
  • Integrated circuit protection from HV

• Time gain compensation : AD8332 using both channels, chained

  • HI setting: -4dB to 92dB amp
  • LO setting: -28dB to 68dB amp

• ADC: 10bits, up to 64Msps here. Test in progress for 80MHz acqs.

• Previous iteration: documentation released: 10.5281/zenodo.5792245

• Schematics

Pics

Design

Prod

Python user code

• Principles are here
• Python code is here

Verilog: using icestudio (work in progress)

.. and a list of binaries. 823f03fdc4bc9354f3f7d20d9fca6d58 is the latest stable one.

823f03fdc4bc9354f3f7d20d9fca6d58  ./20230114_GainTests/bins/working.bin
e33742aa40016c3d32f804f4f5a2916f  ./20230114_GainTests/bins/pll_test_impl_1.bin
823f03fdc4bc9354f3f7d20d9fca6d58  ./20230114_GainTests/bins/hardware.bin
e3ddac9e455002339cf0d9cd9f03672c  ./program/blink.bin
823f03fdc4bc9354f3f7d20d9fca6d58  ./icestudio/lit3/ice-build/lit3bin/hardware.bin
70a0563b9e889dcdd5ab43a0825b8bfc  ./icestudio/old/corePLL/ice-build/corePLL/hardware.bin
823f03fdc4bc9354f3f7d20d9fca6d58  ./example/bins/working.bin
e33742aa40016c3d32f804f4f5a2916f  ./example/bins/pll_test_impl_1.bin
823f03fdc4bc9354f3f7d20d9fca6d58  ./example/bins/hardware.bin

Outputs

Below are echoes from a 5V pulse, gain at 350/1000, HILO being low.

License

This work is based on two previous TAPR projects, the echOmods project, and the un0rick project - its boards are open hardware and software, developped with open-source elements as much as possible.

Copyright Kelu124 ([email protected]) 2021.

• The hardware is licensed under TAPR Open Hardware License (www.tapr.org/OHL)
• The software components are free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
• The documentation is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

Disclaimer

This project is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE.