So, I have a simple robotic arm that has a wire controller you plugin into it. The controller has 8 pins. I haven't played with it too much but I know that the far ends are power sources and the middle pins are to the motors. When a connection is made with one side to a middle prong a motor runs. The motor runs in the opposite direction when the opposite side's prong is used with the motor prong. Because the controller is made completely up of switches and no other components I figured it'd be relatively simple to create a circuit to replace it with the Arduino Uno. However, I'm unsure how I could replicate the switches with a circuit. I don't want to fry the Arduino by plugging the robotic arm right into it so I was considering using relays. But 10 relays would be kinda pricey and I'm not sure if there is an easier way. Does anyone else have any good ideas/advice?
I FOUND THE ROBOTIC ARM ONLINE: Link
EDIT: This is what I am replacing with my Arduino. It will plug right into the arm.