Built one of the first 3d ultrasonic scanner that works in the air to make an au...

		alextousss on April 28, 2023 \| parent \| context \| favorite \| on: Ask HN: Most interesting tech you built for just y... 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...