circuit 5B, remote-controlled car

Kits
1

hi!

I’m on circuit 5B now, and it’s supposed to allow the car to behave like a remote-controlled car. (Kit 15631.) Both of the motors work individually, but when i run the code it does this:

the left wheel, the one that isn’t moving, I tested individually in the motor basics circuit. And even with the exact same wirings it works with the circuit 5A code, but as a commenter said it takes speed 200ish to get the motor going.

In my code I tried to change

rightMotor(250);                                //drive the right wheel forward
        leftMotor(250);

from 200 to 250 with this in mind, but it did the same thing.

Any tips for how to proceed?

2

I tried to attach an imgur video but it wouldn’t let me… whoever replies to this, pls give me your email so I can send the video

thanks!

3

Have you made the circuit modifications as mentioned in the SIKErrata? www.sparkfun.com/SIKerrata

4

Yeah I just double checked all of it…

5

Ok edit: I realized that my wheels were going different directions with the same magnitude, which is why it didn’t want to move. I fixed it in my code.

Now, I am somewhat unsatisfied with the speed of the car. What should I do to my code to have the motor go full speed? Thanks.

6

If you’ve already maxed out the motor speed in code and it’s not fast enough, the only thing you can do to make the motors go faster is to apply more voltage to the motor driver.

The 4 cell battery holder that comes with the kit outputs 6 volts, if you can get a 6 or 8 cell battery holder, that would increase the motor speed.