There are ten sets of pin headers on the board. Enumerating them counterclockwise, starting at the top left, these are:
J1D2, J2D1, J2D2
| J1D2
|
Pin
|
Signal
|
Description
|
| 1
|
|
Unknown
|
| 2
|
|
Unknown
|
| 3
|
|
Unknown
|
| 4
|
|
Unknown
|
| 5
|
|
Unknown
|
| 6
|
|
Unknown
|
| 7
|
|
Unknown
|
| 8
|
GND
|
Ground
|
| 9
|
GND
|
Ground
|
| J2D1
|
Pin
|
Signal
|
Description
|
| 1
|
|
Unknown
|
| 2
|
|
Unknown
|
| 3
|
|
Unknown
|
| 4
|
|
Unknown
|
| 5
|
|
Unknown
|
| 6
|
GND
|
Ground
|
| J2D2
|
Pin
|
Signal
|
Description
|
| 1
|
|
Unknown
|
| 2
|
|
Unknown
|
| 3
|
|
Unknown
|
| 4
|
|
Unknown
|
| 5
|
|
Unknown
|
| 6
|
GND
|
Ground
|
| 7
|
|
Unknown
|
| 8
|
|
Unknown
|
scheme: http://people.zeelandnet.nl/kbgeldof/j2b1_conn.JPG
