current on Technabob...

I have no idea what this is for, but I like it! As a matter of fact, I wouldn’t mind having one of these in my living room – or at least in my la-bor-a-tory. It’s actually something called a mercury arc valve rectifier, and it sure looks cool when…

Aaron Alai made sure that prospective employers – and lovers – will remember him. They’ll remember him as the nerd with the business card that lights up.

Touching two points on the card activates the small LED on the lower right of the card. The unusual schematic is deliberate; it’s…