Mobile Solar LED marquee
I'm interested in prototyping an outdoor solar-powered LED marquee-display drawing messages from a modem/SIM card (and therefore updatable via SMS).
The modem piece of this is certainly possible, I think I could whip this together with an arduino board if necessary. The solar piece is questionable, given the voltage requirements of even a small LED display + modem + controller.
Would love to hear people's thoughts on where to start with this. I'm considering using the LED marquee instructable, or even creating the dot-matrix myself. There are also hundreds of display manufacturers, so it seems like tinkering with a 12V display might be the fastest solution. In terms of solar powered displays, however, I've found only one company doing this, and the costs are enormous.
Thanks for reading.