Hi there,
I've recently bought an Arduino and my first real project is combining it with an old RC-Car, throwing the original electronic components out and doing everything with the Arduino.
My problem is controlling the motors. I use the ones already present in the car. They are DC motors, both for driving and for turning (i think i'll have to redo turning with a servo later, because it does not drive in a straight line). I control the motors with an H-Bridge, following the tutorial at itp.nyu.edu/physcomp/Labs/DCMotorControl
I used a TI L293NE H-Bridge.
The enable Pin is directly connected to +5, the motor logic pins are connected to the Arduino. I uploaded a simple test program which makes the motor run in one direction for 4 seconds, then the other direction for 4s, ...
At first I noticed that the motor runs much slower than if directly connected to the batteries (which were the ones already present in the original car). Even worse, each time the motor gets reversed, it gets slower and slower, ultimately moving only if pushed a little bit in the right direction.
Could anyone tell me why this happens and how to stop that weird behaviour?
Wilson
