Circuit for controlling motor remotely broke my board

Other Hardware Motors, Mechanics, Power and CNC
1

Hi all,
I wanted to ask you guys, what broke my Arduino mkr1000 Wifi board. But while labelling the attached photo I figured it out myself. So my question is:

Is it possible to repair the Arduino? Or is it completely damaged?

Here are the details:
Project -> Control motor remotely via Wifi and using an h-bridge in the circuit.
Circuit -> I built the circuit seen in the photo and I controlled the output pins with my smartphone over wifi. In the photo I highlighted the pins of the MKR1000.
Mistake -> See yellow arrow (row 12 of the breadboard)

So I activated pin 4 (High current) and left pin 5 inactivated (low). After that I used pin 7 to send out an analogue signal between 1 and 255 to enable the h-bridge.

Aftermath:

  • Since then the L-LED stopped blinking after connecting the Arduino to USB
  • the sketch file stopped running
  • The USB port is not recognised at all by any computer (using the same cable that worked before)
  • Double click on the reset button doesn't do anything
  • the green power LED still lights up
  • the 5V and VCC pins still work.

motorcontrol
motorcontrol1324×1744 238 KB

Questions:

  1. So can somebody explain to me, what exactly happened? Is it a short circuit from pin 4 to pin 5?
  2. Is the complete board damaged? Is there a way to repair it?
  3. Are there other mistakes?

Just want to understand in more detail what happened. Thx for any explanation.

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