Max,

I just went through this :) The SN754410 is VERY easy to use, just
like any logic chip. You can drive 2 motors with one chip. They can be
bough inexpensively (http://www.glitchbuster.com), for $1.77 each and
only 1.85 shipping on virtually ANY order. :-D I was very happy when I
found that site. Other places sell the chip for $5 <- Ridiculous.
Anyways, the only downside is that the chip can only handle 1A. So
you'll have to find motors with a reasonable stall current. (you'll
have to check the data sheet).

Ryan


On Wed, 29 Dec 2004 11:12:12 -0500, Bob J <rocketbob@gmail.com> wrote:
> You could use an quad h-bridge, such as the SN754410, to drive the
> motor via pwm.  Some of the newer pics have hardware features to drive
> h-bridges, which makes driving the motor fairly simple.
> 
> The 16F84A is somewhat of a dinosaur now, but I think is still a good
> starting point due to its simplicity and the availability of books,
> tutorials, etc. for it.
> 
> Regards,
> Bob
> 
> 
> On Wed, 29 Dec 2004 17:02:20 +0100, Massimo Gaggero <max@crs4.it> wrote:
> > Hi gurus,
> >     I am playing with a 16F84A and I want to drive an electric 3-5V
> > motor by the pic.
> > Because I think it is not very safe to connect the motor straight to the
> > pic pin, I would ask to you a suggestion from your
> > experience about a safe way to drive the motor using the pic signal
> > (using for example a transistor, yes but which and in which manner) .
> >
> > Thanks,
> >     Max.
> >
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-- 
Have a great day,
Ryan Sandbach
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