Photoelectric light controls are weirder than they seem
16:36
Timer switches: literally just a clock and a switch
24:39
Back-up beepers: Obnoxious, but getting better - and spreading!
18:31
The LED Traffic Light and the Danger of "But Sometimes!"
24:56
There are two types of smoke alarm. One of 'em ain't so good.
27:59
Bright from the Start: GE's CFL with an incandescent trick up its sleeve
21:15
Brown; color is weird
20:08
DIY Laser Image Projector (100ft+ Range!)
16:54