9 volts to power Jack

Hello All,

Is there anything special required for my project if I plug in 9V via the power Jack? The UNO will be connected to a DS1307 and 16X2 LCD display.


I have used 9V "transistor" batteries to power my Uno with no problems except they don't last very long. A better choice is a 6 AA cell pack, it will last much longer and provide higher currents if required.

Your hardware sounds like 3xAA will work fine also.