I have a RoboteQ AX2550 controller.
It's a "plug and *play*" device.
It can surely handle regenerative braking. My robot is a based on an
electric wheelchair and if I move it much when the power has been
disconnected, the controller lights up due to the current from the
motors. (There's a warning in the manual about that. I try to avoid
it.) Also, the braking curve can be set in software so there are lots
2 amps at 15V is at the very low end of the AX2550's capabilities but
it's a handy unit that you could always put to work on something
I don't remember braking and reverse working at the same time. If you have
braking you lose the reverse feature.
www.newmicros.com has a nice moto controller that is good up to 5 amps. You
need two of them.
http://www.robot-power.com/products/osmc_info.html if you want to go that
http://www.active-robots.com/products/motorcon/icon.shtml I think
www.parallax.com sells these too.
If you really want the braking feature you'll probably need to use RC
Electronic speed controls like those sold via www.servocity.com or
www.robotzone.com or www.towerhobbies.com or www.lynxmotion.com
www.google.com is your friend.
try a search for "serial motorcontroller hbridge".
I went through the process of looking for an H-Bridge
a couple of weeks ago. Places you might want to check
out include Acroname http://www.acroname.com (look under
their "Drivers" section and also New Micros
http://www.newmicros.com I have purchased stuff
from both these companies and been pleased with
In my case, I went with the New Micro's NIMH-0010-LED
board which is based on the SN754410 chip. The chip itself
is the H-Bridge, but the board provides a convenient way
of dealing with the chip. The NIMH-0010 comes in two
flavors, plain and with LED's coupled to the inputs
to show logic. Now when I bought the thing, I went with
the LED option which I thought would be useful
in debugging. But it turned out that my cheap little
Radio Shack multimeter was way more useful that the
LED's. Or so I thought. I was using the board as
part of a simple project to show a capability
to use a microcontroller (Atmel AVR, a great MCU!)
to run a biploar stepper motor. Well, when I showed
the thing, everyone thought that the best part of
the demo was the blinking LEDs!
So the NIMH is a handy little board, and the New
Micro's folks were very nice to me when I had
technical questions, and all would
have gone well except that the other night I was playing
with the thing and managed to fry it... I guess
the SN754410 just didn't like the idea of me
hooking up the supply voltage to one of the logic
lines. So now I've got to replace the chip.
P.S. Many H-Bridges have a "brake" state though
regenerative braking is an entirely different matter.
Thanks for the great page! It is just what I was looking for.
Of course anytime somebody does something good, somebody else
asks for something more... so, any chance we'll be seeing the pages
on FET based designs in the near future [grin]?
Seriously, pages like yours are what makes the web worthwhile.
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