Here’s a really cool hack that uses GoogleVoice to translate voice into words and to his LED sign. This should save a lot of time anytime you want to change the message on your LED sign. Brilliant!
I made the LED sign following instructions from this tutorial on Nerdkits.com. The hardware is some LED’s, a nerdkit, a piece of cardboard and a bit of wire that I got from some Cat 5 cable laying around. I cut out the cardboard and printed a grid to help me lay out the LED’s. I think mine were 1 cm apart. The soldering took forever and it was the first real time I did any soldering so it looks kinda crappy. Oh well. It works. The sign itself is powered by a 9 volt battery and receives data from my laptop through the serial port via a USB adapter. All that stuff was included in the Nerdkit when I bought it. The microcontroller is running code from the tutorial I mentioned earlier. One of these days I’m going to make an enclosure for this thing.