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I need some motor drivers that can control a DC motor with 10-15 A and 25 V. I can't find any shield that can do the job. I need to control 4 motors with these.

Can you suggest some models that are good with this?

And one more question: if a driver can control a DC motor in 2 directions, can it control 2 DC motors in one direction each?

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    The "shield" form factor isn't really a good fit for these power levels. Likely a suitable driver will be its own unit, which you will have to connect to the arduino with wires. – Chris Stratton Oct 3 '16 at 21:33
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We don't really answer "shopping questions".
You could contact several suppliers like Adafruit, sparkfun or maybe even Digikey, Farnell etc (ebay?).

If you search for: "15A dual h-bridge" you will find some motor drivers which should work for you.

If a driver can control a dc motor in 2 directions can it control 2 dc motors in one direction each?

Where are you going to use them for? If you're only going in one direction, you won't need a motor driver.

An MOSFET (per motor) is good enough if you only drive one direction. If you want both motors to be able to turn each direction, a dual h-bridge will do.

  • I need to control the speed – Zbang Jun 6 '16 at 12:00
  • You can use analogWrite(pin, value) instead of digitalWrite. The value will be the "on time", so a lower value will make the motor go slower. – Paul Jun 6 '16 at 12:05
  • Nice but can I output around 25 V? – Zbang Jun 6 '16 at 12:39
  • If you use a MOSFET that's rated for over 25V, yes. You'll also need a 25V power supply. – Paul Jun 6 '16 at 12:40
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    Think of the MOSFET as an on/off switch controlled by Arduino. But when you use analogWrite() it's more like a dimmer, for different speeds. – Paul Jun 6 '16 at 12:41
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I think that the current you need is high and you are not likely to get a shield that does that. Look at a H-bridge with the desired current and voltage rating, it will probable be largish with a heat sink. If the motors are going one way then you may just need a simple mosfet style driver. You should probably look for a module with the correct rating as it will have the correct heat sink, track sizes, connections for your motor power and will probably have a diode to protect stuff from the induction spikes. The H bridge will probably be fine with the Arduino output and it may have a voltage reg for its logic that you could use to power the Arduino.

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