Need help on motors and motor driver
April 5, 2012
Please help me out- I want to make a basic robot like the start here bot but with an arduino micro processor instead of picaxe. Getting enough money to make it is a problem as I've got only $50. So I can't buy a motor shield for the arduino that I will try to assemble myself an a breadboard. I have been through a tutorial that teaches you to make a motor shield using a L293D motor driver but the problem with that is that the stall voltage of motors you can use with it is very low (1.2 V) while most motors that I know of have a stall voltage of greater than 3 V and I'll be using those motors. My question is- if I provide the motors with external voltage of 2.4 volts using rechargeable batteries, which is under the stall voltage and use the motor driver to provide the extra voltage then will the motors work as they do? Will continuous exposure to current under the stall value destroy the motors out will they be fine? Is their going to be any change in the programing part? While answering, please keep in mind that I'm an absolute beginner and using the L293D is my only hope of using a motor driver and staying in the budget.