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| | Unfortunately, when I go to pick LEDs out of the catalogs, they're not | | Unfortunately, when I go to pick LEDs out of the catalogs, they're not |
| | rated in lumens, they're rated in candelas. | | rated in lumens, they're rated in candelas. |
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| | ---- | | ---- |
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| | <br> | | <br> |
| | Spoke-POV and propeller clocks links: | | Spoke-POV and propeller clocks links: |
| − | * A POV device able to display any video file thanks to an embedded Gumstix http://roseace.telecom-paristech.fr/
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| | * An entire discussion forum devoted to POV displays http://www.ladyada.net.nyud.net:8090/forums/viewforum.php?f=11 | | * An entire discussion forum devoted to POV displays http://www.ladyada.net.nyud.net:8090/forums/viewforum.php?f=11 |
| | ** In particular, lots of nice pictures http://www.ladyada.net.nyud.net:8090/forums/viewtopic.php?p=4712 | | ** In particular, lots of nice pictures http://www.ladyada.net.nyud.net:8090/forums/viewtopic.php?p=4712 |
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| | * [http://popsci.com/povclock Popular Science: "Build It: The Persistence of Vision Wall Clock"] by Dave Prochnow | | * [http://popsci.com/povclock Popular Science: "Build It: The Persistence of Vision Wall Clock"] by Dave Prochnow |
| | * Arduino Polar Scanner Project [http://www.desk-nijverdal.nl/ArduinoPOV.html] | | * Arduino Polar Scanner Project [http://www.desk-nijverdal.nl/ArduinoPOV.html] |
| − | * LilyPad Arduino POV Wristband [http://blog.craftzine.com/archive/2010/03/lilypad_arduino_pov_wristband.html]
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| − | * "Mechanically scanned display stuff" built by Rickard Gunée [http://www.rickard.gunee.com/projects/]
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| | While most POV displays spin the LEDs in a complete circle, some "wiggle" the LEDs back and forth: | | While most POV displays spin the LEDs in a complete circle, some "wiggle" the LEDs back and forth: |
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| − | * "the Orbital Rendersphere"[http://www.orbitalrendersphere.com/][http://beagleboard.org/blog/2013-12-17-project-spotlight-orbital-rendersphere/][http://www.eetimes.com/author.asp?section_id=36&doc_id=1319591&print=yes][http://www.popularmechanics.com/technology/engineering/gonzo/7-builds-we-love-from-world-maker-faire-new-york-2013-7#slide-7][http://makerfaire.com/makers/makerbars-orbital-rendersphere-2-0/], aka the "Big Giant Spinning Limb Slicer".
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| − | The Orbital Rendersphere displays images and videos on a four-foot diameter spherical surface using persistence of vision (POV).
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| − | Uses a (stationary) Mac Mini to render each frame, and a (spinning) BeagleBone Black to update the LEDs.
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| − | Slip ring for power; Wi-Fi to transfer data.
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| − | The Orbital Rendersphere displays video at 30 frames per second by spinning four vertical LED strips spaced 90 degrees apart at 450 RPM.
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| − | 36 feet of WS80211 LED strips.
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| − | ''(But it looks like 2 complete circles, each 4 ft diameter -- isn't that closer to 25 feet?)''
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| − | 102x224 pixel resolution.
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| − | Several people comment that this is the biggest POV globe they've ever seen.
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| − | It's mentioned on p. 1-44 of
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| − | John Baichtal, "Robot Builder"[http://books.google.com/books?id=6W4eBQAAQBAJ].
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| − | Uses LEDscape[https://trmm.net/Orbital_Rendersphere].
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| − |
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| − | * "Mike Cook's magic wand"[http://www.raspberrypi.org/mike-cooks-magic-wand/][http://www.thebox.myzen.co.uk/Raspberry/Magic_Wand.html].
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| − | * Mike Szczys. [http://hackaday.com/2012/09/11/full-color-video-on-a-spinning-pov-display/ "Full-color video on a spinning POV display"]. Built by Félix, Sylvain, and Jérémy at at Telecom ParisTech. highest-resolution POV display I've seen so far. "The time it took us was roughly two months full time". (Does this have a name?)
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| − | * [https://www.das-labor.org/wiki/Borg_Ventilator "Borg Ventilator"]. Twice the resolution of the Telecom ParisTech display? A total of 244 RGB LEDs (spread over 4 wings). Has standard VGA input; a Xilinx FPGA and a bunch of support chips convert to circular coordinates. Power through slip rings. Data through non-contact inductive transfer (recycled VCR head). "The speed is infinitely adjustable between 0 and 2500 rpm / min. The FPGA adapts to the actual speed"
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| − | * Collin Cunningham. "Ceiling fan POV display"[http://makezine.com/2009/07/23/how-to-ceiling-fan-pov-display/][http://www.instructables.com/id/Ceiling-Fan-LED-Display/]. A single ATMEGA328 and 20 74HC595 shift registers to drive the LEDs. 32 LEDs per fan blade x 5 blades = 160 LEDs.
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| − | * Gareth Branwyn. "MonkeyLectric 3D spherical POV display"[http://makezine.com/2010/12/15/dan-goldwater-projects/][http://www.instructables.com/id/n00tron-3D-Spherical-Display-Interactive-Exhibit/]. by Dan Goldwater / MonkeyLectric.
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| − | * [http://stargateeggbeater.com/ "The Stargate Eggbeater: Spherical Persistence of Vision (POV) Display Device"].
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| − | Mentions
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| − | <q>
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| − | "we recently decided to move this project to the Raspberry Pi board away from Arduino.
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| − | The capabilities and processing power of the Pi are much greater than Arduino.
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| − | ... [but] ... the refresh rate is too slow, much slower then the Arduino was.
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| − | We need some help figuring out how to turn up the SPI speed with our current software arrangement.
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| − | ...
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| − | used Phillip Burgess' at Adafruit 'Light Painting' Python script to process images and output to the LPD8806 http://learn.adafruit.com/light-painting-with-raspberry-pi/software
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| − | "</q>
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| − | * PixelPi: RGB Pixel Array Driver for the Raspberry Pi[https://github.com/scottjgibson/PixelPi]. Based on Phillip Burgess 'Light Painting' Python script. Apparently supports many different POV hardware displays.
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| − | * [http://www.eetimes.com/author.asp?section_id=36&doc_id=1319194&print=yes "POV Deathstar Doubles as Spherical Display"]. Raspberry Pi; Xilinx Spartan-6 FPGA with a DVI decoding core; 360 x 168 pixel resolution; 10 frames/s; 4-phase commutator to deliver 75 watts of power.
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| − | ** [http://povglobe.wordpress.com/system-overview/][https://www.engineering.leeds.ac.uk/faculty/news/2013/visually-stunning-project.shtml]
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| − | * [http://electronics.stackexchange.com/questions/137110/rotating-pov-led-cylinder-using-addressable-rgb-led-strips "Rotating POV LED Cylinder Using Addressable RGB LED Strips"]
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| − | ''(FIXME: make a separate section for bicycle POV displays)''
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| − | * Hazard. [http://www.instructables.com/id/RGBike-POV-Open-project/ "RGBike POV - Open project"]. Arduino compatible; 16 RGB LEDs; hall effect sensor; through-hole components and single-layer PCB for easy fabrication.
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| − | * liquidhandwash [http://www.instructables.com/id/Simple-POV-wheel-lights/ "Simple POV wheel lights"] -- elegant and simple. No circuit board. No microcontroller.
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| − |
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| − | * [http://code.google.com/p/bicycleledpov/ Bicycle LED POV] is an electronic LED bar to attach on bicycle wheels. When riding the bicycle, the LED bar will draw with light, text messages and image animations. Free/Open hardware, firmware and software.
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| − | * [http://www.makezine.com/blog/archive/2007/03/luscious_electric_delight.html "luscious electric delight"]: source and schematics for a large graphical LED panel. Uses 12 MAX6953 LED drivers; each MAX6953 drives four 5x7 led matrices. The PC generates arbitrary bitmap, sends it out the serial port to a PIC, which translates it to I2C bus connected to all the MAX6953 LED drivers, which update the image at a continuous frame rate of 30fps.
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| − | * [https://oldwiki.blinkenarea.org/bin/view/Blinkenarea/BlinkenProjects BlinkenProjects]: projects with lots of LEDs[http://www.kiu.weite-welt.com/de.schoar.blog/?p=206], including a 3D LED array. Wiki: http://wiki.blinkenarea.org/
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| − | * [http://www.ianpaterson.org/projects/spokepov20050704/index.htm Ian’s Spoke POV] Review it.
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| − | * [http://www.electric-clothing.com/superpov.html Project: Super POV] Review it.
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| − | * [http://www.ladyada.net/make/spokepov/index.html SpokePOV Persistence of Vision for your Bike] Very nice, kit available.
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| − | * [http://www.attiny.com/dotmatrix.htm On this page you will find a scrolling LED sign based on the ATtiny2313 AVR microcontroller] Row Column approach with a shift register]
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| − | * [http://blog.makezine.com/archive/2007/02/flashing-led-bra.html Flashing LED Bra]
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| − | * [http://www.evilmadscientist.com/article.php/peggy "Peggy," A Light Emitting Pegboard Display]
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| − | * Christmas trees are now led based so: [http://computerchristmas.com/ The #1 Site for Controlling Christmas Lights with a Computer]
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| − | * [http://members.misty.com/don//ledx.html Don Klipstein's LED Main Page] Lots of good info.
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| − | * [http://www.instructables.com/id/Synchronizing-Fireflies/ Synchronizing Fireflies] ATtiny super smart swarm of LEDs.
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| − | * [http://www.u-disp.com/ U-Disp - An Open Sourced USB display]
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| − | * [http://crushingabyss.com/sunrise_alarmclock/index.html Sunrise LED Alarm Clock] ATMega8515 controlling two color-mixed high-power LED channels with PWM. Also contains a RTC circuit and a serial port. Full source including PC Windows serial port communication code.
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| − | * [http://dotmatrixdesign.tumblr.com/ dotmatrixdesign: Twitter LED Scroller Build Log]: an Arduino shield for a 7x5 LED matrix, and all the schematics, board layouts, Arduino firmware, and PC software to make it scroll text from a Twitter feed.
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| − | * [http://www.thekeeser.com/Projects/mechanically_scanned_led_display.htm "Mechanically Scanned LED display"] by Chris "thekeeser". Using PIC16F628, a infrared 1 pulse per revolution sensor so it can automatically adapt to any rotation rate, and multi-colored LEDs. Detailed notes on the software development.
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| − | * [http://sites.google.com/site/libby8dev/stripes/examples "PhorsePOV - a minimal handheld POV"] by Julian Skidmore. Avr AtTiny25 based driving 6 LEDs and uses a single button to enter text.
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| − | * [http://electronics.stackexchange.com/questions/tagged/pov Electronics Stackexchange: questions tagged POV Persistence Of Vision] has a long list of questions people are asking about POV displays, many of them with excellent answers.
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| − | * [http://ohmprojects.com/prop/prop.html Ohm's propeller display] and [http://ohmprojects.com/prop-rgb/prop-rgb.html Ohm's RGB propeller display]
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| − | * ahmedebeed555. [http://www.instructables.com/id/7-segment-pov-16F84/ "7 segment pov 16F84"].
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| − | It might be nice to make a [[spinning electronic]]s page to describe the many weird and wonderful ways that people (a) get power to the spinning electronics, and (b) transmit data to and from the spinning electronics.
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| − | POV displays are the most popular kind of spinning electronics,
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| − | but the same approaches are useful for other kinds of spinning electronics
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| − | such as run-time tire pressure sensors and [http://electronics.stackexchange.com/questions/12704/electrified-vertical-mounted-rotary-joint-questions bioreactors].
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| | [[category:projects]] | | [[category:projects]] |
