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In lugnet.robotics.handyboard, handyboard@media.mit.edu (Paul DaCosta) writes:
> Now, I recieved two good answers for my problems.
>
> 1) Built an H-Bridge
> 2) Use the LMD18200
>
> Now has any one any documentation on an easy H bridge that I could build
> without wasting much time?
www.yahoo.com, search for "H Bridge", trust me, lots of hits will comeup.
Look for the 4QD pages, they talk a lot about H Bridge designs. If you
aren't comfortable with electronic design, don't bother though...
> The same goes for the LMD18200, I understand that is not compatible with
This IS an H Bridge. Its a 3Amp one. Go to the National Sem. site and
get the databook pages for it, there are circuit design suggestions in
there that are quite detailed.
> the HB, has any one built a small circuit which would interface the HB
> and LMD18200
As opposed to a large circuit? 8-() If you don't feel comfortable with
designing your own circuits, check out http://www.hvwtech.com and look at
their L298 driver board, its about US$15 and has all of the parts, put it
together and connect it up. I have two of their boards, very nice.
> Oh yeah, one more thing, how about connecting a 5 ohm resistor in series
>
> with a DC motor and there are 2 amps flowing, then the resistor is
> dissipating 20 watts of heat.
> Now I could have a higher value for the resistor, like 7, 10 ohms, I
> think that could do it too!
>
> Is this an easier way???
Actually, this is a fairly easy way to make a space heater, is there some
other reason you want to do this? If you want to use this as a motor speed
control, its a very bad (wasteful) idea. PWM is what you want, the H-Bridge
type controllers just love to use PWM to handle this.
have fun,
DLC
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Message is in Reply To:
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| Now, I recieved two good answers for my problems. 1) Built an H-Bridge 2) Use the LMD18200 Now has any one any documentation on an easy H bridge that I could build without wasting much time? The same goes for the LMD18200, I understand that is not (...) (25 years ago, 23-Sep-99, to lugnet.robotics.handyboard)
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