Wiring for the Mega is similar to the Uno and Leonardo. Only the SPI pins are in a different location.

Cut and insert the header segments

Insert the double-sided male header sections into the Mega female headers. You will need header sections for:
  • 3.3v - 1 pin
  • GND - 1 pin
  • A0 - 1 pin
  • Digital 2-7 - 6 pins
  • Digital 8-9 - 2 pins
  • Digital 50-51 - 2 pins
  • Digital 52 - 1 pin

Connections:

Start by connecting Pin 1 of the breakout cable (red wire) to the header pin for 3.3v on the Mega.

Being careful to keep the wires in order (there are duplicate colors), make the rest of the connections as follows:

1. (Red) -> 3.3V
2. (White) -> NC
3. (Grey) -> NC
4. (Purple) -> NC
5. (Blue) -> NC
6. (Green) -> A0
7. (Yellow) -> D-52
8. (Orange) -> D-7
9. (Brown) -> D-5
10. (Black) -> D-6
11. (Red) -> D-2
12. (White) -> D-4
13. (Grey) -> D-3
14. (Purple) -> D-50
15. (Blue) -> D-51
16. (Green) -> NC
17. (Yellow) -> NC
18. (Orange) -> D-9
19. (Brown) -> D-8
20. (Black) -> GND
This guide was first published on Apr 28, 2013. It was last updated on Apr 28, 2013.
This page (Wiring the Mega) was last updated on Oct 12, 2020.