[paulnovacovici]

I’m an application developer by day, but lately Claude Code and Codex have finally made microcontrollers approachable enough for me to start tinkering with them on the side. I built this little “holographic” display that shows the surf forecast for any beach. While my friend built the casing, and mechanical part of it

https://x.com/paulnovacovici/status/2041722840190480581?s=46...

[pastel8739]

This is super cool. At first I thought the “tank” on top was filled with water—I wonder what it would look like if it were

[_def]

any details on the display itself?

[paulnovacovici]

Display is part of a dev kit EPS32-s3, and the holographic part is an illusion called “peppers ghost”

[mikestorrent]

Beautiful piece of kit. I have no idea how it works from looking at it, fantastic. Please do post a full writeup on it.

[narmiouh]

Its a pretty straight forward technique, the display is at the bottom and in the glass cube there is a mirror at 45 degree angle facing you (you can see the mirrors edge on the side wall) which reflects the image from the display at the bottom making it look like a hologram

[danparsonson]

You can create the same effect on a smart phone screen with a video like this: https://m.youtube.com/watch?v=CIszi2Kv_lk and a some clear plastic sheet put together like this: https://www.twowaymirrors.com/wp-content/uploads/2019/11/pep...

OP: beautiful work with your surf projector!

[paulnovacovici]

Yup! We first started very similar with a phone and testing out the illusion then moved over to a microcontroller for a little nightstand device

[deskamess]

Do you happen to have instructions on how to build the plastic sheet setup or perhaps a pointer to something that I can buy?