Question about 4WD Mobile Platform and his motors

[Piero78]

Hi, I've a question about the 4WD Mobile Platform. This platform have 4 DC motors, but I can connect only 2 motors to the Romeo-All in one Controller 1.1, it's true? And now, how I can connect all motors of the rover to the controller?

Thanks!

[Hector]

Hi,


You just need to plugin the 2 left motors on 1 side and the 2 right motors on the other.


Please take a look at the connection diagram I have made for you.

[Piero78]

Excuse me, but in this case I have to use a breadboard on the rover to connect all 4 motors to Romeo, it's true?

Thanks for the response!

[Hector]

Hi Piero,


No, the breadboard in this case is just to help you see clearly the way to wire it.


You can just tie the wires together and connect them to the Romeo terminal block


Just pay attention to the polarity and rotation direction, if things are not working as expected you need to reverse the wires on 1 motor.

[Piero78]

Ah ok, now I understand, I have 2 motors connected to each connector. 2 for those on the left and 2 right ones, thanks!

[Piero78]

Another question about this product. Can I to power it (Romeo controller and all 4 motors) with only a 9V battery? If it isn't possible, can you tell me a solution? If I have to open the rover to replace battery every time, it's a problem. Thanks!

[Hector]

You can power it with a 9volt battery, but it won't last very long. I recommend something like this:
http://www.dfrobot.com/index.php?route=product/product&filter_name=battery&product_id=489

[Piero78]

I've seen this battery, it's cool, I can connect it to the Romeo and it power controller and motors (and sensors), but I don't have a power supply to recharge it. In DF store there is a power supply for this battery? Can you tell me a good solution for this problem? Thanks for your help!

[Hector]

You can just use a 8.5V, 1Amp wall wart to charge this battery. You will need a male-female converter.


You can use two of these female jacks to make a cable for charging your battery.
http://www.dfrobot.com/index.php?route=product/product&path=70&product_id=508

[Piero78]

Excuse me, but there ins't a power supply for this battery that I can use without use other wires and adapters?