[lain]‘s newest wearable project features two 21×10 dot displays (front and back). The panels are constructed from 5×7 LED modules from HP. The display is driven by an AVR ATMEGA32L. The 21×10 matrix would require 31 wires, but lain implemented a shift register so only 4 wires are needed. The hat has a microphone so it can do beat detection and VU display. It can also scroll space invaders, play pong and show text. The batteries and control board are in the ear flaps. Lain keeps referring to this as the perfect summer season hat which I can’t understand since today it’s going to hit 101degF at my house.