Phosphorescence chemical POV – Spray painting with UV LEDS, mtbf0 writes –

when i started building arduino brain machines i had a bunch of minipov boards left lying around, so i built one with uv leds. works pretty well. has it’s own font built in and room for about 950 characters of message. as presented here, there is an output bug at the end of the second line, but i reckon i’ll work on that in the morning. meanwhile, i can wave it around and wipe poetry onto a piece of butcher paper painted with fluorescent paint. here’s some not very good video of the chemical pov running the above code. the light does persist a little longer than it appears to in the video, but i think it will work better when i replace the current limiting resistors.

2 Comments

1. 

   andre

   April 26, 2009 at 3:41 am

   hi there ada..

   i had a cool idea. get one of those self adhesive “exit” signs, clean off the green paint with acetone and IPA, and use the backing glue to hold it to a hard drive platter.

   Then write as normal, while the platter is spinning with an infrared LED array to “erase” the remanent phosphorescence.

   Voila, instant “scrolling POV”

   🙂
   -A

2. 

   andre

   April 26, 2009 at 3:52 am

   and with a little smd uv magic and analogue read, make a circulating buffer to store video etc.

   -A

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