Help on L298 to DC motor!

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi i'm new to the forum and world of robotics. Hope you guys can help with my mini project.

Im trying to use an arduino to run a 24V/3A DC motor. Based on internet findings i'll be using the L298 chip. However, i'm unsure on interfacing them together. Do i need to use seperate diodes or resistors and such?

Thanks! :slight_smile:

2

Take a look at this:-
http://www.thebox.myzen.co.uk/Workshop/Motors_2.html

It doesn't use the L298 but a very similar chip. It will explain the fundamentals. Just connect the arduino output pins to the logic inputs of your chip and don't forget to connect the grounds together if you are not using opto isolators.

3

Thanks for the link, Grumpy_Mike!

I'll look into it and try to figure things out from there. :slight_smile:

4

Hi.

Currently I've been looking into this website http://itp.nyu.edu/physcomp/Labs/DCMotorControl and followed most of the wiring and set up in the picture. The only difference is that I've switched the L293D with a L298N and the fact that I'm using an external battery to power the motor. But I still cant get it to work!

I think there's a connection problem with my set up. I've connected the inputs and enable to the arduino and the outputs to the motor. Or maybe its a problem with the programming that different from the L298?

Please help!

5

Have you made sure that the -ve of the battery is connected to the ground of the arduion?