Hi, Question 1: can anyone tell me do we need a rheostat or face-plate starter for a 12V dc motor? I read in the book and it says the starting current for the motor is very high and it might burn out the armature. I was wondering if I could just directly connect the 12V supply to the 12V dc motor? Or do I need put a rheostat and gradually decrease the resistance as the motor picks up the speed. Question 2: I just bought some DC motors from the store and some of the motors have 4 pins. I can see the +ve and -ve sign on the motor but there are also 2 more pins labelled as " l ". Can anyone tell me what the 2 pins are for? Thank you for your kind help.