Go here:
http://www.usfirst.org/community/frc....aspx?id=10934
chapter 3, bottom of page 7:
Quote:
3.1.7 Competition Port Pinouts
The competition port is used to enable / disable the robot. A “dongle” is provided in the Kit of Parts
for teams to use for this purpose when not in a competition. If teams need to make a replacement
dongle or need additional spare dongles, a team-constructed dongle can be fashioned by
connecting pins 8 and 9 of the competition port to a switch. NOTE: it is essential that the other pins
of the connector be left unconnected, as some of the other pins contain power and/or ground –
accidentally shorting other pins of this connector can permanently damage the Driver Station.
An inexpensive dongle (shown in the photo below) can be fashioned out of components readily
available locally:
• PC Board Toggle Switch SPST
• D-Sub Connector 9 pin male
• D-Sub Connector Hood sized to fit
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There is a picture on page 8 that might be helpful.