UPDATE:
So I havent gotten around to trying to upload anything via a second arduino.
I have tried the following:
Removing the LM7805:
Didnt help at all. No connection from PC possible. nothing.
Replacing the LM7805:
With 12V , Without USB from PC plugged in-> LCD screen flashes on then fades to black. Nothing is displayed
With 12, With USB from PC->LCD screen stays on, PC recognizes COM port and repetier host can connect. Havent been able to actually control the printer this way though
Without 12, With USB-> status LED is bright, i have 5 V on the 5V lines, but the PC doesnt recognize the COM port anymore...
Replaced LM7805 is still getting really hot..even with no peripherals attached..
How can it be that only when both the 5V from the 12V supply and the 5V from the USB supply are attached that my PC recognizes the COM port? What could be the reason that the LM7805 is getting so hot?
So I havent gotten around to trying to upload anything via a second arduino.
I have tried the following:
Removing the LM7805:
Didnt help at all. No connection from PC possible. nothing.
Replacing the LM7805:
With 12V , Without USB from PC plugged in-> LCD screen flashes on then fades to black. Nothing is displayed
With 12, With USB from PC->LCD screen stays on, PC recognizes COM port and repetier host can connect. Havent been able to actually control the printer this way though
Without 12, With USB-> status LED is bright, i have 5 V on the 5V lines, but the PC doesnt recognize the COM port anymore...
Replaced LM7805 is still getting really hot..even with no peripherals attached..
How can it be that only when both the 5V from the 12V supply and the 5V from the USB supply are attached that my PC recognizes the COM port? What could be the reason that the LM7805 is getting so hot?