There was a tip for a thirty-minute video which showed the tuning of ultrasonic transducers so they could function as tools. The example of ultrasonic knives, drills and soldering irons were mentioned but never demonstrated. This video was nearly overlooked because it was long and it wasn't about a hack, per se. Fortunately, there was a point in the video where the transducer reacted to some pressure by changing amperage and that, in my mind, was a pressure sensor built out of a piezo sensor which is usually only able to detect movement at the time of the movement. For a thirty-minute video, it was surprisingly content-rich which earned it a fair appraisal.
You can find all my Hackaday articles on my author page.
The rest of the Hackaday summaries have been arranged by date.
Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
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