Tell us about yourself!
Project: Infinity Mirror
Agreed - not variable.
It's a good project although slight mis-named. I would like to see some kind of warning advice as these power supplies can have lethal voltages present, especially if sufficient time has not elapsed since their last use.
LEDs and Lighting Class
From the official Arduino website:The board can operate on an external supply from 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.