[Ytai] let us know about his POV globe, all four parts of its current progress. While he says he was inspired to write up the project from a YouTube clip, we know the real reason. Regardless, the plan is to have a 2 foot diameter globe with 256 LEDs spinning at 50 revolutions per second streaming images from an SD card using SPI. While the project isn’t completed yet, we know [Ytai] will pull through like he has in the past, and you can be sure we’ll keep you up to date on his progress.
We put a temporary ban on posting POV projects after receiving several LED spheres back in May. But we had to lift the injunction after seeing this superb Volumetric 3D POV display by [Wes Faler] and [Don Smith].
Their creative use of several readily available components adds to the alluring setup; the central elements being just a box fan and Peggy kit from EMSL. The video after the jump doesn’t really do the project justice, but if you missed it at Maker Fair Detroit and can’t make your own it’s the best you’re going to get.
[Daniel Daigle] is developing a rotary display that uses persistence of vision to graph data. The hardware he used includes a spinning head from a VCR, some LEDs, and a timing circuit to display 360 degrees of data. His timing input uses a waveform so this will work with any application where you can generate a PWM signal.
Check out his videos after the break that demonstrate a graph with a single line and another with six display lines.
The PhorsePOV by [Julian Skidmore] almost slipped by, but we thought it was a nice easy hack for your Memorial Monday. The gadget uses an ATTINY25 to drive 6 LEDs aren’t standard characters 7 units high? Which when waved in the air produces a readable message. What we were really interested in is the use of a single button for text entry, called Phorse code, or an “easier to learn and remember” version of Morse code. While it seemed silly at first, most of us here could enter messages within a few minutes of trying.
[youtube=http://www.youtube.com/watch?v=bt1UEGD3BDk]
Here’s a slick version of a POV globe(google translated). Created by [Riko], this globe has 32 LEDs and is powered by a rotating coil. The layout looks fairly solid in operation, with the POV effect showing up very nicely on camera. You can get the schematics and source code from the project page.
We found this project, just like the previous fantastic LED globe on HackedGadgets.com. Apparently someone linked to this project in the comments. That is fantastic, that is what the comments should be for. Please help keep our comments polite and helpful as well, even if you are just linking to a project that you think is better.
[youtube=http://www.youtube.com/watch?v=VF2dI7RiMVQ]
[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.
This gorgeous persistence of vision clock was built a couple years back by [mb1988]. The housing is made of acrylic with a hard drive motor mounted in the center of the back panel to spin a PCB. The two-sided circuit board is home-made and includes a battery for power, ATmega32 for the brain, 32 LEDs, four display drivers, and a real time clock module. The spinning hard drive motor is nearly silent and already has threaded mounting holes on it. [mb1988] uses an optoelectric sensor to sync the display with the rate of rotation. The forum post includes download for the code and hardware details. Don’t miss the demonstration after the break.
