user33147: I hacked a cheap car I connected both motors to L298N Dual H-Bridge Motor Controller and all things are working good. Motors are running fast. But when I put the car on the ground to run. It runs so slow. I am using 4.5V for L298N.
What can I do to run it fast on ground?
I have tried PWM but it does not work.
What can be the causes of this?

user-1: It cannot draw enough current I suppose. When wheels are free-spinning, the load on motor is very small. When you put it on ground, the load increases, and it is slow because there is not enough current to drive the load

33147: <p>I hacked a cheap car I connected both motors to L298N Dual H-Bridge Motor Controller and all things are working good. Motors are running fast. But when I put the car on the ground to run. It runs so slow. I am using 4.5V for L298N.
What can I do to run it fast on ground?</p>

<p>I have tried PWM but it does not work.</p>

<p>What can be the causes of this?</p>
 -1: <p>It cannot draw enough current I suppose. When wheels are free-spinning, the load on motor is very small. When you put it on ground, the load increases, and it is slow because there is not enough current to drive the load</p>
