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Ask HN: Most interesting tech you built for just yourself?

1901 points l2silver | 1 comments | 27 Apr 23 15:04 UTC | HN request time: 0.205s | source

Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.
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jo-m ◴[28 Apr 23 08:49 UTC] No.35738987[source]▶
I have a rail line right under my apartment, so I built a small computer vision app running on a Rasperry Pi which records each train passing, and tries to stitch an image of it.

It has a frontend at https://trains.jo-m.ch/.

Edit: it's currently raining and the rain drops are disturbing the images a bit.

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INTPenis ◴[28 Apr 23 20:05 UTC] No.35746416[source]▶
When you say "right under my apartment", where exactly do you mean? Because I also have a train line going underground very near my apartment but it's not directly under. Could I capture such images? And I'm on the 4th floor.
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uuuuuuuuuuuuuuu ◴[29 Apr 23 06:24 UTC] No.35750533[source]▶
I got confused at first too. What he means is "somewhere outside on the ground level while my apt is not on the ground level, there are trains passing by which I can see from my apt". You need line of sight.

This is not mysterious tech deriving images from sound traveling through the floor. You will be out of luck with your underground subway.

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1. ilyin ◴[01 May 23 22:03 UTC] No.35779827[source]▶
A fun fact is that there is a monorail station built in the middle of a residential building, so it might also be literal.

https://en.m.wikipedia.org/wiki/Liziba_station