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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: 0.28s | 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.
1. belzebalex ◴[28 Apr 23 13:42 UTC] No.35741184[source]▶
Built one of the first 3d ultrasonic scanner that works in the air to make an autonomous drone [1] [2]

[1]: https://www.alextoussaint.com/2021-04-28_How-I-built-an-ultr...

[2]: https://hackaday.com/2021/05/15/a-phased-array-ultrasonic-3d...