Niklas Roy is a self-described inventor of useless thing and among his creations is an Electronic Instant Camera. It's an interesting hybrid that uses a black & white video camera and a thermal printer to produce an instant photo.
Red, yellow, or green will indicate the levels of diesel or exhaust in the air, while creatively illuminating the scene at a nighttime gathering. If your balloons are mostly red, I'd suggest relocating to a less polluted locale.
The final project of a team from Cornell University, this electronic hogu, modelled above by a lantern-jawed mannequin called Bob, uses piezoelectric sensors and a microcontroller to measure the kicks and punches between contestants in a Tae Kwan Do bout. Piezoelectric sensors and a microcontroller are implanted in…