POV LED sphere

[Csaba Bleuer] has built this really nice POV LED sphere.  Looking at the hand drawn schematic, it appears that he’s using an Atmega8 as the core. The resolution is pretty decent, and even shows fairly well on camera despite the refresh issues. Although much cleaner, it looks like a similar implementation to this one that we covered back in october of last year. He’s still got some polishing to do to match “the orb” though.

Comments

  1. spyder_21 says:

    Nice job, but needs to spin faster.

  2. Brennan says:

    The motor speed doesn’t seem fast enough to me, but I’m sure the effect is better in real life than on camera. Great job!

  3. fartface says:

    you know if people would learn to use their video cameras they would get these to look great on video.

    set the shutter to 1/30 a second and all the pov stuff looks great as long as it’s not super slow design or the camera is a really crappy one that wont allow you to set shutter speed.

  4. bogdanfirst says:

    It is a nice project. I think the bad effect if because of the camera and is not visible to the eye, it seems to spin fast enough to me..
    P.S. It reminds me of the movie ‘Contact’.

  5. Simonious says:

    So.. if you made a series of these all driven on the same spindle, but as progressively smaller rings slightly offset from each other, you should have a pretty good platform for some basic 3d images that extend below the spherical surface seen here, right?

  6. GeneralFault says:

    Simonious,
    It’s a great idea… I’ve started something much like this. Trouble is that at any decent resolution and with LEDs running at a few cents a pop and some sort of driver chip (I’m using CPLD’s), it gets very expensive very quickly. Any interest in funding such a project?

  7. Whatnot says:

    The annoying reality is that these things never look on a vid like they do in real life, but it’s still cool and a nice job, also well done to show the thing stationary in the video, gives you a better view of the details.

  8. Simonious says:

    GeneralFault: While your project is probably legitimate, I did once try to help fund a project. I got suckered.
    Still.. if you want to show me where you are at:
    simonious@gmail.com

  9. Csaba Bleuer says:

    Hi,

    Obviously the rotation speed is too low (6rpm). But it is described in the zip file published on hackedgadgets.com (http://cseb.hu/canalglobe.zip)

    I have no video camera, I used a borrowed photo camera. Not the 1/30s is good, but 1/6s. the photos were taken with that exposure time.

    The video is with 30fps, so it is obvious, that you get 2.5 picture while the LEDs are facing you, and 2.5 while they point to the opposite direction. It’s not easy to make it look like in reality.

    Increasing the rpm: I need a lathe, a miller, a table drill, and something I can not say in english… :-) I did the whole thing with a hand drill, and a saw. Make higher rpm with those. :-)

    I will not make a 3D version, but I give you all the rights. :-) I will no more solder 64 LEDs with transformer wire. :-)

    Csaba

  10. bogdanfirst says:

    @Csaba Bleuer
    It can’t be 6rpm. That’s one rotation every 10 seconds….

  11. Csaba Bleuer says:

    Ooops! Yes. It is 6 rotation per second, 360rpm.

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