I was shopping for a RC car that have servo on the front and a dc motor on the back to use as a platform for a arduino project. I bought one which i thought had a servo on the front but when a disassembled it, i found a dc motor with a gear box and a magnet, depending on the direction of the current i apply to the dc motor i can turn the wheels left or right but i can not make them straight.
My question is what is the magnet used for it has two cables going in to it(orange and green), is it used to make the wheels straight? bigger question is what exactly do i have?
I will be using this car with a ardumoto board to move a line follower.