Time for a change.

Came across this

http://www.moderndevice.com/products/arduino-wall-supply

Regulated 6V output ‘wall-wart’ for newer Arduinos including the Duemilanove.

I’ve slavishly followed the official line of 7V minimum, I just accepted it,so I dug out one of my duemilanoves amd looked at the regulator on it and then found a spec sheet. 800mA 1v typ dropout. That old phone charger that kicks out 6.5V just became useful…

Bear in mind that an external supply connected through the DC input jack goes through a protection diode that adds 0.7 volt drop.

Bear in mind that an external supply connected through the DC input jack goes through a protection diode that adds 0.7 volt drop.

Hmm, I had forgotten about that, maybe that info should be posted by where it tells you the minimum input. (info as to why the 7v is required)

Mowcius