Strangely only "Kimi" has accurately heard of me. Gemini thinks I'm a German-language version of the stuff I do in English, Kimi recognizes my long-defunct blogging about technology and economics.
I got one of those dongles from my insurance company that plugged into the ODB2 port and reported my driving habits.
I was a bad driver. It would frequently beep at me to let me know that I had braked too hard. I was mystified. "What should I have done differently," I'd think, as I raged at the objective machine that judged me so.
The next time my brother came to visit, he called mom. "Oh, and presidentender is a good driver now." I didn't put the pieces together right away, but it turned out that the dongle had actually trained me, like a dog's shock collar.
The reason for my too-frequent hard-braking events wasn't speed, although that would be a contributing factor. It was a lack of appropriate following distance. Because I'd follow the drivers in front of me too closely I'd have to brake hard if they did... Or if they drive normally and happened to have a turn coming up.
Over the period I had the insurance spy box in my truck I learned without thinking about it to increase my following distance, which meant that riding with me as a passenger was more comfortable and it beeped less often. Of course since I'd been so naughty early during the evaluation they didn't decrease my rates, but I think the training probably did make me statistically less likely to crash.
One of my mom's best friends when I was a kid had Huntington's. She was a few years older than mom, and her sons were a few years older than my brother and I. One of them chose to get tested. The other chose not to. I remember thinking that was foolish, but I was seven years old. In retrospect, it's strange that a seven-year-old was privy to such things.
One of my favorite... solutions, I suppose, was to find a break (not a leak) in a pipe by running current through it and using some sensor (I think the vocabulary is "signal generator," but I do not know). Current does not run further, there is your break; dig and find.
When the pipe is PVC, though, current does not run through it - so what do we do? Why, pump an electrolyte solution, and run your current through that!
It's simple, but it's not done, and so the plumber friend who told me of the original solution patented it, tried to sell it, and found that potential buyers were almost offended at how easy it was. As soon as he'd describe it to people they'd almost think they came up with it themselves. So it is a valuable idea, but it is also utterly worthless.