Here's a little diagram I drew up for the electronics I want to implement into my helmet. The fans are for air circulation and ventilation, and the LEDs are for getting that cool on/off transparency effect that Sean Bradley has dazzled us all with. Yes I just took a picture of the paper, and yes my handwriting looks like it was made by a five-year old with Parkinson's, but it's all I'm gonna give you. I believe that I can just get all of this stuff at Radio shack, right?
I hear that a 9v battery will power a 12v fan. If I have two 12v fans on one circuit, would I just need two 9v batteries then? I'm not too experienced with electronic stuff.