I have a RAMPS 1.4 board and an Arduino Mega as part of a SmartRap kit that I have never got successfully working.
I can connect them up to my computer via USB I am able to communicate with the Arduino. I can read a temperature and correctly see the status of an endstop. I have removed all other components for debugging purposes.
If I then plug in the power supply (to the 5A connector) I can no longer communicate with the board. If I unplug and plug the USB back in I can no longer connect.
I've checked the power supply output is 12V with a multimeter.
I'm slightly confused by the D1 diode, I have one (I think from looking at the board) and my understanding is that powers the Arduino if the USB isn't plugged in. Is this a problem if I want to use the 12V external power supply and USB at the same time?
I'm concerned I may have damaged either board with some incorrect wiring at some point or have a faulty component. Any advice would be greatly appreciated.
I can connect them up to my computer via USB I am able to communicate with the Arduino. I can read a temperature and correctly see the status of an endstop. I have removed all other components for debugging purposes.
If I then plug in the power supply (to the 5A connector) I can no longer communicate with the board. If I unplug and plug the USB back in I can no longer connect.
I've checked the power supply output is 12V with a multimeter.
I'm slightly confused by the D1 diode, I have one (I think from looking at the board) and my understanding is that powers the Arduino if the USB isn't plugged in. Is this a problem if I want to use the 12V external power supply and USB at the same time?
I'm concerned I may have damaged either board with some incorrect wiring at some point or have a faulty component. Any advice would be greatly appreciated.