[chbot] Sensor Information

[Charles Manning]

Hi Jim

Have you considered rolling your own H bridge? Not too difficult. I can show 
you a simple but reasonably efficient circuit if you wish.

I have bought ICs from pololu.com who have been very responsive:
http://www.pololu.com/catalog/category/17
They also have boards: 
http://www.pololu.com/catalog/category/11

What ever you do, avoid the L293D (not that it has enough power for the motor 
you're driving). 

-- CHarles


On Friday 20 March 2009 14:33:05 Jim Ronald wrote:
> Hanno,
>
> I'm looking to drive a couple of GHM-01 motors using differential steering.
> Which parts did you end up using for a motor controller?
>
> Jim Ronald
>
> > Hi,
> > Thanks everyone for another great night at Kiwibots.
> > I enjoyed the robot presentations and look forward to a line-following
> > competition at the next meeting.  Richard, please share your plans for a
> > simple, low-cost follower so we can all build one.  Should we run two
> > races?  One on a simple oval- say 1M in diameter, and another on
> > Richard's more complicated shape?
> >
> > I enjoyed all the thoughtful questions about my DanceBot, ViewPort and
> > the sensors I use.  Here are the part numbers:
> > - Parallax Propeller on a Parallax Protoboard
> > - ViewPort v3.0: earlier version available here:
> > http://mydancebot.com/viewport
> > - Lynxmotion Geared Motor (GHM-01) with Quadrature Encoder (QME-01)
> > - ADC: MCP3208
> > - DAC: sigma-delta resistor/capacitor using the Propeller counter
> > - Temperature Sensor: npn transistor: bc109
> > - Parallax PING sensor
> > - Parallax Compass: HM55B
> > - Hobby RC Gyro: GWS-PG03
> >
> > I'm happy to answer any questions.
> > Hanno
> > http://mydancebot.com
>
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