Adafruit 2.1mm DC Barrel Jack to 2nd Generation MagSafe Adapter

If you own a MacBook, you'll recognize this little friend. The premise of this 2.1mm DC Barrel Jack to 2nd Generation MagSafe Adapter is simple. There's a MagSafe plug on one end and a 5.5mm/2.1mm DC barrel jack with center positive polarity on the other.

This allows you to connect a 15-20VDC power supply to something that expects to connect to a 2nd generation MagSafe. Since you can easily destroy hardware using this adapter, it's really recommended only for experts and those who fully understand what they're getting into by pushing arbitrary voltages into their sophisticated devices!

Use a multimeter to probe the magjack pins to verify you've got the correct voltages before plugging it into your computer. A version with a 1st generation MagSafe plug is also available. There is no regulator or voltage protection in this adapter. An incorrect power supply or reversed wiring could destroy your laptop, so exercise caution!