Ask any home audio enthusiast and they'll tell you: there's nothing quite like precisely adjusting settings via an giant knob. However, they can't all be huge or our living rooms would be covered by the things. Enter the Puck: a wireless RFID reader that also contains an accelerometer, controlled by an Arduino Mini and created by Eric Gradman along with Tyler and Brent Bushnell. RFIDs mounted to walls or other surfaces tell the PUCK what function to to control, and then the accelerometer serves to increase or decrease the value as it's turned, truly turning it into a virtual knob. If you're done snickering, there's a video after the break showing one Puck controlling three separate light colors individually, perfect for dialing in the perfect mood or concert lighting -- if only it co
