Rosace

Persistance of vision mill. Or a 2m diameter RGB rotating screen.

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Fred Sapey-Trimphe builds persistence of vision mils since 2009, called SPIM or e-Rosace.

http://www.mepic.fr/?page_id=494

Since 2013, the Rosace displays actual color videos at 15fps with a Raspberry Pi for storage and rotation computations, hooked to a FPGA for the tight real time signals and angle interpolation.

https://www.youtube.com/watch?v=v7z_S63g47M
https://youtu.be/x2YBD7hN7RU?t=1m32s

Logs:
1. Rosace v1.5
2. It's getting out of hand

1 × Raspberry Pi B stores videos and computes the rotations
240 × RGB LED
1 × Antti's ProAsic3-Stamp with A3P060 https://hackaday.io/project/6813-proasic3-stamp
1 × Big 5V power supply
6 × large capacitors

It's getting out of hand
Yann Guidon / YGDES • 08/17/2017 at 14:12 • 0 comments

The new controller system now looks like this :
I hope it's enough because there is no room left now :-D
Rosace v1.5
Yann Guidon / YGDES • 06/15/2017 at 22:44 • 0 comments
A new version of the Rosace is being developed, hopefully for an exhibition in September.
The upgrade is significant :
- 25 fps instead of 15
- 200 LED diameter (instead of 120)
- Faster, synchronous (2-wires) LED strips
- RPi 3B+ instead of Pi B (v1.2 from 4 years ago)
- Introducing the 3RGB (de)compression algorithms (see #3RGB image lossless compression format)
- simplified auxiliary circuits in FPGA
- Multi-threaded programming (yeah! 4 cores!)
So it's a significant evolution but not a revolution, yet...
Stay tuned !