AVR-Chat

wow.. thx for the readings =)

after that I've done some more research into this area and some more 
n00bie questions arose:
- jst want to confirm: it is possible to directly connect the mega32 
to the L6203s to drive the motors right? *looks nervous.. what we 
have atm is the bidirectional DC motor control circuit suggested in 
the datasheet for the L6203, replacing the L6506 with the mega32..

- how does one know if the motor can be driven using lock-antiphase 
or not? there doesn't seem to be anything mentioned in the 
datasheets...

thx guys for your help

--- In AVR-Chat@yahoogroups.com, "Larry Barello" <yahoo@...> wrote:
>
> Check out www.barello.net/Papers/Motion_Control
> 
> I find that using the ENABLE input gives less control over the 
motors.
> After you have puzzled through the paper, above, then look at
> 
> www.barello.net/Papers/H-bridge.pdf
> 
> The hand drawn graphs in that paper were taken directly from an 
oscilloscope
> screen.
> 
> 
> Cheers!
> 
> 
> -----------
> Larry Barello
> www.barello.net
> 
> 
> | -----Original Message-----
> | From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] 
On Behalf
> | Of katraven1
> | Sent: Saturday, August 26, 2006 11:07 PM
> | To: AVR-Chat@yahoogroups.com
> | Subject: [QUARANTINE] [AVR-Chat] Re: PWM for reversible DC motors
> | Importance: Low
> | 
> | thx for that help =)
> | 
> | *feeling very n00b...
> | 
> | jst wanna confirm:
> | we're using an L6203 for each H-bridge, which has 1 enable and 2
> | inputs. Am i right to say that the two inputs change the 
direction
> | of the motor?
> | as in, if i put the PWM into input1, it'll go one way and vice 
versa
> | if i put it into input2? I can't seem to find a good ref which 
has
> | this explained clearly...
> | 
> | and, if this is the case.. how could I configure the other ports 
to
> | change the direction?
> | 
> | --- In AVR-Chat@yahoogroups.com, dlc <dlc@> wrote:
> | >
> | > The Mega32 has two PWM channels (OC's) that you should use for
> | motor
> | > speed.  Use one or two of the other IO lines per H-bridge to
> | select the
> | > direction.
> | >
> | > DLC
> | >
> | > katraven1 wrote:
> | > > we have an ATmega32 connected to 2 H-bridge circuits for 2 DC
> | motors
> | > > which need to be reversible..
> | > >
> | > > we're using timer1 to generate our pwm signal and my idea 
was to
> | use
> | > > one or the other of the OC1 pins to change direction.
> | > >
> | > > would there be a better method of doing this? using my 
current
> | > > thinking, the wheels would only be able to work in pairs but 
not
> | > > independently...
> | > >
> | > >
> | > >
> | > >
> | > >
> | > >
> | > >
> | > >
> | > >
> | > > Yahoo! Groups Links
> | > >
> | > >
> | > >
> | > >
> | > >
> | > >
> | > >
> | >
> | > --
> | > -------------------------------------------------
> | > Dennis Clark          TTT Enterprises
> | > www.techtoystoday.com
> | > -------------------------------------------------
> | >
> | 
> | 
> | 
> | 
> | 
> | 
> | 
> | 
> | Yahoo! Groups Links
> | 
> | 
> | 
> | 
> |
>