Hi all,

Bit of a skeptical user here as I've gone through an Arduino Mega and Ramps 1.4 board so want to make sure I do things right...

I've bought a new ramps 1.4 board which has come with a jumper on the two 5V pins. Do I leave this there or remove it?
I plan to use the 12V AUX pins to power an external fan to cool the boards.

Any help appreciated

Preddy

The 5v pin only connects vcc power to the four 5v servo pins

If you have no servos (this includes bl touches and similar probes that deploy) you don't need it. But it also wont hurt anything if you leave it on.