i am a new bee here…
I want to connect 4 dc motors (12v) to the arduino to make a normal bot which can run forward,backward and can also turn left and right (by running motors of both sides in opposite direction) .A simple solution would be to use a quad motor shield for the same.But i am from india and there isn’t 1 available here.The only motor shield which i can use is this
http://www.rhydolabz.com/index.php?main … cts_id=773
But it states that it can only handle 2 dc motors .From what i get i think that it cannot control 4 dc motors separately but i can use them if i pair 2 motors from each side to get a single terminal. i need 4 dc motors so that my bot can effectively turn left and right .
What i think is that pairing 2 dc motors from each side and taking out a single terminal from both and then connecting it to this shield.
Is this possible???
If not then plz suggest me some solution…
Hi,
You can always buy two of the 2-motor shields for a total of 4 motors
Watch the connections to the arduino though.
himanshudongre:
But it states that it can only handle 2 dc motors .From what i get i think that it cannot control 4 dc motors separately but i can use them if i pair 2 motors from each side to get a single terminal. i need 4 dc motors so that my bot can effectively turn left and right .
What i think is that pairing 2 dc motors from each side and taking out a single terminal from both and then connecting it to this shield.
Is this possible???
If not then plz suggest me some solution…
What’s possible is dependant on the motors used. You could wire the same-side motors in parallel and control them with a single channel but this doubles the current through the controller. If the motors draw too much current you can damage the controller. You might try wiring the same-side motors in series but now the motors only get half the voltage and so may not run fast enough for your usage. Because DC motors are not built all exactly the same, each will try to run at a different RPM for a given voltage and so the same-side motors will “fight” each other a bit, with 1 motor doing more work than the other.
So let me ask, do you really need 4 motors ? Why not have just a left and a right -side motor and leave 2 of the wheels undriven. Most cars don’t have 4WD and they work OK.