dc motor control

Started by andy...@aol.com March 11, 2007
hi,
I am wondering how to control 4 DC motors without buying an expensive
motor controller. I need speed control, and direction.

Thanks,
Andy
I have actually been doing some research on this topic. My plan is to
create an h-bridge, which is used to control the motor via a
microcontroller. Here are the materials I am planning on using:

2 optoisolators (PS2501)
2 mosfets (IRF9520
2 mosfets (IRF511)
4 1k resistors

I haven't purchased the materials to put it together yet, but I do have a
decent diagram. You can easily find out more by doing a google search for
h-bridge, or h bridge. Good luck.

On 11 Mar 2007 09:50:47 -0700, a...@aol.com
wrote:
>
> hi,
> I am wondering how to control 4 DC motors without buying an expensive
> motor controller. I need speed control, and direction.
>
> Thanks,
> Andy
>
>
>
>

--
Scott
www.AntiFuel.com

Minds are like parachutes, they only function when they are open.
I forgot to mention this is only good for one motor. You will need more
supplies to make a circuit for 4 motors.

On 3/11/07, Scott wrote:
>
> I have actually been doing some research on this topic. My plan is to
> create an h-bridge, which is used to control the motor via a
> microcontroller. Here are the materials I am planning on using:
>
> 2 optoisolators (PS2501)
> 2 mosfets (IRF9520
> 2 mosfets (IRF511)
> 4 1k resistors
>
> I haven't purchased the materials to put it together yet, but I do have a
> decent diagram. You can easily find out more by doing a google search for
> h-bridge, or h bridge. Good luck.
>
> On 11 Mar 2007 09:50:47 -0700, a...@aol.com
> wrote:
> >
> > hi,
> > I am wondering how to control 4 DC motors without buying an expensive
> > motor controller. I need speed control, and direction.
> >
> > Thanks,
> > Andy
> >
> >
> >
> >
> >
> > --
> Scott
> www.AntiFuel.com
>
> Minds are like parachutes, they only function when they are open.

--
Scott
www.AntiFuel.com

Minds are like parachutes, they only function when they are open.
> ... how to control 4 DC motors...

There is great value in building an H-Bridge from discrete transistors
- just to know what goes into it. Here's one kit:
http://www.robotstore.com/store/product.asp?pidb&catid65

You'll probably find, though, that it is easier to use an inexpensive
DC-motor controller chip like the 1-Amp 754410
(http://focus.ti.com/lit/ds/symlink/sn754410.pdf) or 3-Amp L298
(http://www.st.com/stonline/books/pdf/docs/1773.pdf). Each of these
can fully control two DC motors.

You will also find several sources )like
http://www.picobotics.com/picoHB2.html) of these drivers on convenient
boards for experimentation.
Tom