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LED POV Globe with Prop — Parallax Forums

LED POV Globe with Prop

TharkunTharkun Posts: 67
edited 2017-01-11 10:19 in Propeller 1
Hi,

i just want to show you my new propeller project, a POV globe with 64 RGB LEDs.
I use the APA102 that are cascaded and can be switched very fast via SPI.
The LEDs are firing by two cogs with clusos CpuBlade !!!
The 120x64 bitmap with 24bit color is load into the propeller via sd card.
Complete instructable




Regards
Christian


Comments

  • Peter JakackiPeter Jakacki Posts: 10,193
    I love it! Well done!
  • RaymanRayman Posts: 14,646
    Very neat! I want to make one, but I'm sure my kids would stick their fingers in there...
  • Heater.Heater. Posts: 21,230
    Awesome.
  • MikeDYurMikeDYur Posts: 2,176
    Very very nice.
  • VonSzarvasVonSzarvas Posts: 3,450
    Awesome job. Well done!
  • Peter JakackiPeter Jakacki Posts: 10,193
    edited 2017-01-11 13:57
    But I have to ask, why was an Arduino necessary for "critical timing"? I would have thought that the Prop could have handled the whole lot standing on one of its eight heads.
  • TharkunTharkun Posts: 67
    edited 2017-01-11 16:24
    Peter Jakacki wrote: »
    But I have to ask, why was an Arduino necessary for "critical timing"? I would have thought that the Prop could have handled the whole lot standing on one of its eight heads.

    No, the arduino only generates the pwm for ESC/Motor
  • Heater.Heater. Posts: 21,230
    Surely the Prop can do that PWM thing as well ?
  • TharkunTharkun Posts: 67
    Heater. wrote: »
    Surely the Prop can do that PWM thing as well ?

    ÄÄhhhmmm. Yes of course. But the Prop rotates 40 times/second and i've enough problems to get power to the ring ;-)

  • SeairthSeairth Posts: 2,474
    edited 2017-01-11 16:53
    Beautifully done! As Peter suggests, you could certainly use the Propeller for your PWM output (and button input) as well. Add a hall-effect sensor on the shaft and you could have the Propeller automatically set the speed.

    Edit: Ahh! I see. The Prop is on the rotating part!

    Edit edit: well, there's a way around that! Put the motor and ESC in the rotating part too! ;)
  • Heater.Heater. Posts: 21,230
    I see. Fair enough.
  • xanaduxanadu Posts: 3,347
    Awesome!
  • TharkunTharkun Posts: 67
    edited 2017-01-11 17:48
    Seairth wrote: »

    Edit edit: well, there's a way around that! Put the motor and ESC in the rotating part too! ;)

    Ok, that's the next challange, who's first ? :smile:

    @ all : Thanks !
  • JonnyMacJonnyMac Posts: 9,104
    Wow! Very cool.
  • SeairthSeairth Posts: 2,474
    FYI, your project is today's top staff pick in the daily instructables email!
  • JonMJonM Posts: 318
    Really Awesome! And good job combining the Arduino and Propeller. This would be a very cool practical for a movie or something, and if it were possible to stop the image from rotating, it would be really neat as a communication device. I really need to check out the P8XBlade2 for a project that I am working on.

    One note, the link for the "microSD Breakout" appears to be broken.

    Thanks for sharing.
  • TharkunTharkun Posts: 67
    JonM wrote: »

    if it were possible to stop the image from rotating

    One note, the link for the "microSD Breakout" appears to be broken.

    the rotation is only a feature, i thought the video looks better !!!

    the link for the "microSD Breakout" is repaired !!!!


    Many thanks to Jon and also Seairth
  • GenetixGenetix Posts: 1,754
    Awesome, especially the Death Star!!!

    Could you have used a BASIC Stamp instead of an Arduino?
  • Cluso99Cluso99 Posts: 18,069
    Magnificent. Love the 3d printed ring for the LEDs.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2017-01-13 02:45
    Wow. Well done! (BTW, Earth rotates counterclockwise, as viewed from over the North Pole.)

    -Phil
  • ozpropdevozpropdev Posts: 2,792
    Brilliant! Illuminating! :)
  • KeithEKeithE Posts: 957
    edited 2017-04-19 03:26
    The data transmission and PWM frequencies seem low compared to the APA102 - no?
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