The FIRST VEX CHALLENGE allows a maximum of 10 motors & servos in your competition robot. Yet there are only 8 motor ports in the micro controller. How can one use all ten motors/servos with only eight ports?
It is possible to use Vex Y-Cables to power multiple motors off a single motor output port. This will cause 2 motors to move with the same motion.
Y-Cables are available here:
http://www.vexlabs.com/vex-robotics-electrical-parts.shtml
For all rules about FVC usage, please refer to their Game manuals. For any rules related questions please refer to the Official FVC Q&A.