Can I use relays for motor control?
I'm making an Arduino sumo robot, and the Arduino can't give enough current to the motors. I don't want to have to buy anything while making this. I was wondering if I could have the Arduino activate 5 volt relays and then have the relays activate the motors, which eould have their own power supply. If that's not possible, tell me some way that I can just use a few transistors or whatever (but no ICs).