Let's Make Robots!

Persistence Of Vision (POV) Display


After struggling for days with multiple designs, I have come up with something showable (I doubt this word exists). I have not included automatic movement here. I am moving the leds with my hand. Modifications are on the way.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Hello Junkster !

I'm always amazed by what you can do with very few things.

Can you give more details of how you did it ?

Is it just LEDS on a stick you're balancing by hand in the dark ?

There are similar versions of several things that i build. Sometimes i make things by combining existing ideas of others.

I soldered 10 leds on a stripboard's piece (the piece is in the shape of a strip). The arduino is programmed to turn ON all leds for 2 milli seconds. Then only the 5th and 6th are ON for the next 6 milliseconds. Again all go ON for next 2 milliseconds. This creates the letter H when leds are moved simultaneously. For spaces, all go OFF for 2 milliseconds. Finally, all are OFF for about 150 milliseconds. This is to give time for leds be come back at initial place. The time I have written may not be exact as i don't remember them properly. I have explained the procedure for "H". Similarly "HELLO" is created

I had several plans on moving the leds. First, i tried using an ungeared dc motor to produce oscillatory motion. Then the same with a geared motor.

Here, it is simply what u have guessed. The PCB attached on a piece of plastic (about 20cm long) moved by hand. I have tried continuous rotation for the leds. This seemes to be the best technique of the ones i tried. I have to make it a bit stable before it can be put up on the internet.