Hi all, i have a problem with the external power supply.
I connected a rechargable NMH 9v battery to the VIN and GND pins, as documented in http://arduino.cc/en/Main/arduinoBoardMega256 It says: "Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector."
And also VIN. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
But after some hours of testing my arduino cannt be powered externally anymore, it can only be powered by USB.
It seems that some diode does not work anymore, but as stated in the official page, i made everything properly.
Any idea about this kind of problem?
Thanks in advance.