Building RaspPi Camera Robot - Chassis Bundle with 4WD chass

[scottyblizz]

Hi

I am looking to build something similar to the advertised Raspberry Pi Camera Robot - Chassis Bundle. However I would like to use the 4WD chassis instead of the 2WD.

Will the Dagu Arduino Mini driver board still be sufficient for this task? I see it has 2 h-bridges....does that mean it can output to 2 or 4 wheels?

Control wise the front and rear left/right pairs don't need to be controlled independently, I was planning on using a turning method similar to tanks (left wheels turn back, right wheels go forward for a left turn for example).

Thanks

Scott

[Alan]

Hi Scott,

Welcome to the forums.

It's definitely possible to build the robot using the 4WD chassis, but we haven't created a kit for that option and you'll need to do the soldering to attach wires to the 4WD chassis motors.

The basic approach is to wire the 2 left motors in parallel to the ML connection on the Mini Driver, and the 2 right motors in parallel to the MR connection on the Mini Driver. To make the connections I'd recommend using part of a terminal block that you can buy from places such as B&Q.

To steer, the tank steering method that you've suggested seems to work well. You can see a test 4WD robot we built a while back here. One day it might be nice to do a proper kit, but unfortunately I'm lacking time at the moment.

Regards

Alan