This is a very early stage of an Active shutter 3D homebrew system

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This is a very early stage of an Active shutter 3D homebrew system
Compose of a transmitter (expected to be connected to a computer one day)
that is made of Longan Nano (GD32VF103CBT6 Risc-V microcontroller) nowadays
just sending a sync signal thow a FS1000A 433Mhz transmitter.
The other component is the receiver, made of an Alhambra II (iCE40HX4K-TQ144
FPGA Development Board) connected to a RF-5V 433Mhz receiver on one side and
to the left and right shutter in the other (Connected throw external
transistor circuit for handle the 8V that it needs).

The receiver is already working, it get a sync signal, calculate the period
time and open-close the lens during one cycle (half cycle per lens), doesn't
matter the frequency between 1KHZ and 4HZ, the frequency can change
dynamically and the FPGA will adapt to it.

The transmitter is just sending a sync signal while switch on a led for
test that glases are sync and the led light cam be seen just from one of the


Electrical schema

JPEG Image - 777.70 kB - 09/17/2020 at 10:11



Function test

x-matroska - 2.35 MB - 09/17/2020 at 10:10



Function test

x-matroska - 1.45 MB - 09/17/2020 at 10:10



Function test

x-matroska - 1.24 MB - 09/17/2020 at 10:10


  • 1 × Longan Nano (Risc-V microcontroller)
  • 1 × Alhambra II FPGA
  • 1 × Any kind of 3d active shutter glasses
  • 2 × BC547 Transistor
  • 2 × Resistor 1K

View all 8 components

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zipotron wrote 09/18/2020 at 09:45 point

Thanks a lot Dan! Your comment reminds me that when I start to think about the active-shutter system I was surprised that despite how old this technology is, there were no open implementations or information about the standards. And it's a nice technology, I'll try to get there

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Dan Maloney wrote 09/17/2020 at 18:22 point

I used an active-shutter system way back in the early 90s, I think on a Silicon Graphics machine that was used to 3D protein structure visualization. The effect was amazing at the time. IIRC, the glasses were linked to the terminal with an IR transceiver - IRDA was a big thing at the time, but RF not so much.

Good luck with this, looking forward to seeing how it turns out.

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