YAY! The Siru.box I ordered just came in. Havent used it yet but its basically a usb controlled and powered power supply. Lets you control the voltage and/or current and even has a very simple API so you can control it programatically. Not sure if/when I will have a use for this but it was cheap enough and cool enough I figured I'd snatch one up.
@freemo @Electronics use it to rig many lights in your house and make it so that when somebody walks past a hidden motion sensor shit starts flickering like it's a hunted house and play those "creepy wind" sounds. Invite superstitious people to your house, record their reaction, put it on the internet.