The ground sensors for the e-puck robot use three infrared proximity sensors point to the ground in the front. The ground sensors can be used for following a black line on a white background.
Extra Battery An extra battery allows for approximately 3 hours of usage.
Charger Allows for recharging the e-puck battery
gumstix Option allows to increase the computational capability of the e-puck. The gumstix is a 600 Mhz processor that runs Linux.