Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [pov]

POV stands for Persistence Of Vision

16 questions
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1 answer

What makes a good RGB LED

I am looking for supplier for RGB LEDs for an upcoming project RGB POV LED Globe. Normally I would go to my local electronics supply story, but this project requires lots (~1000) of LEDs and my local electronics store charges a premium for the LEDs,…
Steven Smethurst
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7 answers

Power for POV display

I want to build a small POV display, but how is the power (and if possible a communication line) transmitted to the spinning part? I've looked at some POV project, but they usually don't explain that part much...
jojo l'abricot
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3 answers

Which SIPO chip is better, 74HC4094 or 74HC595 or something else?

I want to drive lots of LEDs in a spinning persistence-of-vision (POV) device. I need one output pin per LED, because matrix techniques don't work right in spinning POV devices. A serial-input, parallel-output (SIPO) chip is the best way to…
davidcary
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3 answers

POV globe speed questions

I am planning on creating a RGB LED POV globe only physically larger then that one. I am planning on using 64 RGB LEDs, requiring 3x pins per LED for a total of 192 outputs. Obviously I am going to need some shift registers. I have looked in to…
Steven Smethurst
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6
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3 answers

How to build a POV display?

I've recently gotten the itch to build a POV Display. I'm wanting to build the sort that rotates "vertically" (like a fan or bicycle rim) and I'm finding very little information on how to actually do it. Can anyone find any resources for actually…
Earlz
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4 answers

Determine the angle and speed of a rotating platform

I have a 1 axis (x) spinning platform, that is spinning pretty fast ~300 RPM. I want to be able to detect with a good degree of precision how many degrees it has travailed from its starting position and the speed it is currently trailing at. For…
Steven Smethurst
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4
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3 answers

LED persistence of vision (POV) project

I recently saw an article with a LED cube 8x8x8. I saw that it relies on an optical phenomenon called persistence of vision (POV). So I wanted to create a simple circuit with 4 lines each one with one LED, that will light up with a frequency that…
konsalex
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5 answers

Arduino Mega 2560 like board but with more ram

I am making a POV RGB LED Globe that plays animations on its surface. Currently I am using a Arduino Mega 2560 with 256k of Flash Memory. My program and the boot loader take up 20k of memory leaving me with 236k. There are 64 RGB LEDs using 8 bits…
Steven Smethurst
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2 answers

PCB Layout Help/Feedback

Intro I'm making a POV (persistance of vision) display-type PCB (this is my first PCB ever), using AD9833 chips as controllable clock generators for some PWM drivers I'm using so that I can control the frequency of the PWM precisely. I'm now doing…
wootie11
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1 answer

Dotstar Light Strip Low Update Frequency

I've built the start of a persistence of vision display. The rotation platform itself is built and I have just mounted the LEDs. After doing some testing, I can only get very slow update speeds of the lights themselves. I am using a very simple for…
Billathekilla
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Rotating POV LED Cylinder Using Addressable RGB LED Strips

​My son and I are trying to build a somewhat large Rotating POV Cylinder (or Globe) making use of ready-made Addressable RGB LED strips (WS28011 or LPD8806?). After some browsing, we found that many of the stuff in the web make use of Arduino and…
jbl
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LED Array Controller Circuit PCB Design Questions and Feedback

Background I'm designing a LED controller based on a Teensy 4.1, some AD9833 Function Generators and some TLC5948 LED Drivers. I'm aiming to make an instrument of sorts, specifically a POV display that transmits a series of musical notes via light…
wootie11
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POV display possibility with ws2812b neopixel strip

I am trying to build a full RGB POV display. Unfortunately I purchased a neopixel strip (ws2812 144/m), and lately found that its data transfer rate is 800khz that is actually less for POV display. It is rather suggested to use APA102 based strip…
Debojit Kundu
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Mount a detachable LED strip to spokes of bike

I have an LED strip and Arduino I have mounted onto the spokes of a bike using twist ties (like this: https://learn.adafruit.com/bike-wheel-pov-display/install-on-bike). I want to make it detachable though and was wondering how to go about doing…
Tyler Hilbert
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POV( Persistence of vision ) : Syncing the Refresh rate of LEDs with rotation

I am trying to make a POV globe and my block diagram is the following: The goal was to make one without using microcontrollers and using basic components available. My main query is that : What would be the refresh rate of LEDs between different…
vortex_sparrow
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