Arduino Mega 256 pins

Using Arduino Installation & Troubleshooting
#1

It's so confusing ... pin 20..., pin A5... pin D18 ... etc ... Every one uses other names, other numbers ...
Is there any one who can show me a picture or a chart where CLEARLY is stated what pins are what ? (on the Arduino Mega 256)

Thanks in advance.

ArduinoMega2560_R3_Front.jpg
ArduinoMega2560_R3_Front.jpg2785×1353 971 KB

#2

It's labelled right on the board.
A0 to A15 are also digital 54 to 70.

In your code, do not use Dxx.
byte pinX = 2; // 0 to 69 are valid
byte pinX =A0; // A0 to A15 are valid

#3

You can also google for "arduino mega2560 pinout" and see some pretty good charts.

#4