Asked — Edited

Need Help Hooking Up An External Motor Controller

I have a motor controller that only requires 4 inputs. 2 for direction, and 2 for PWM. I can make the wheels turn constantly by applying +5v to the PWM inputs- and the wheels reverse when I apply +5v to the direction inputs.

I can activate the motor by connecting the wire to the center-pin of an EZ-B digital port- which is always 5v. But when I connect the wire to the signal pin of the port, nothing happens when I switch the port off and on in ARC.

Any suggestions?

BTW- I am using the built-in H-bridges of the robot's previous controller, a Serializer board. Its H-bridges can be externally controlled.


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Synthiam
#1  

Do you have a schematic? Or a Datasheet that we can go off of? I'm certain it will be an easy solution:) Hbridges are generally pretty easy.

Let's get you rock'n!

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Synthiam
#3  

@ConfoundedHound I looked at the datasheet. I'm not really sure what they are trying to say. It does read like they imply you can use the external controller on it. But not very clearly...

Quote:

If you wish to drive the internal H-Bridges from an external controller, you can simply connect the pins (labeled in blue) to the appropriate step and direction pins as shown above with jumper wires.

The image has nothing BLUE. And i don't know if cutting the traces is part of the process of an external controller? I have no idea. I'm sorry, I think your best solution is to purchase either the SparkFun one that ppl use on here. Or wait for the single-wire connection one that i'll be releasing in a week.

#4  

I was already beginning to lean that direction. I really appreciate your taking the time to look into it- so I will certainly wait a week for your official EZ-B motor controller, to help support the cause! Thanks again for your great product and support. For me, you are making the robot hobby fun again!