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What is it? This set of modules is part of a project has a specific target of providing a low-cost, open source technological kit to allow scientists, academics, hackers, makers or OSHW fans to hac...Read More…
This set of modules is part of a project has a specific target of providing a low-cost, open source technological kit to allow scientists, academics, hackers, makers or OSHW fans to hack their way to ultrasound imaging - below 500$ - at home, with no specific equipment required. For complementary sources of information, you can visit the Hackaday Page, our github repo or the online modules manual.
It consists in several modules one can get separately on Tindie:
You'll still need to get a raspberry pi 0, some headers, and the motherboard. The second picture shows an example of a setup.
No piezo supplied.
The aim of this module is to get the electrical signal coming back from a transducer, and to deliver the signal, analogically processed, with all the intermediary signals accessible to the user.
All key signals are accessible, and jumpers, as well as pots, enable on-board fine-tuning of the signals.
The signal for example coming from the testing unit ( a 2MHz DAC) yields:
This gave for example the following image from a vintage ultrasound probe found on ebay:
A ultrasound pulser that allows Need to get down to 100ns wide square high voltage pulses, both in the positive and negative. Control of pulses must be through 3.3 or 5V tolerant logic pulses height must be selectable at ~25V, 50V, 75V (for positive pulses) and -25, -50V, and -75V for negative. Only power supply required is 5V
Headers are not included!
Settable 0, 25, 50 or 75V for positive high voltage, same applies to negative high voltage.
See three pulses on a piezo done without impedance adaptation below, with the resulting echo.
Who doesn't need a quick and dirty ADC pHAT for her/his pi, especially these small wireless marvels? I know I need one, for trigger-based, burst action.
It's a ADC pHAT ... 2x ADC interleaved.
Testing the module with the signal emulator module, which yields a signal at 1.9MHz, it well seen at 1.9MHz, with a sampling speed equal to two times this freq, ie 24Msps ! See the results here. Image is below:
I did those to do ultrasound processing !
This was made with love.
The modular design is also extremely robust, extremely versatile, and having access to all intermediary signals enables you to do whatever you want with your ultrasound imaging system.
The 3 modules are already available separately, this is a bulk pack =)
Sure! You can find the Kicad and Altium files here](https://github.com/kelu124/echomods/). Make it yourself! Part of the price here includes the fab fees.
This project is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE.
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La Poste: Worldwide untracked letter
Cheaper, but slower and untracked, option to shipping.
DHL: Standard Ground Rate
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Was a former ultrasound engineer.
Tinkerer of sorts.
The work on Tindie is strictly my own.