NEWBIE Needs help for Motor Controller

Frankfern123

Hi All. I need a schematic for a reversible 12 vdc motor controller that can handle up to 10 Amps for my project. Any help would be greatly appreciated.

Thank You in advance.

Mike Green

There are lots of designs on the web like this one. This was found by searching for "H-Bridge 12V 10A".

Frankfern123

Thanks for the link. I do have a model K158 Bipolar stepper motor controller from KITSRUS. Do you know if I can use this to run a single 12 vdc motor bidirectionally with speed and stop function as well. Thats what i really need for this project. I'm assembling it on a Propeller Board Of Education board but was wondering if I should switch to the new activity board that programs in C. Regardless I'm still on a steep learning curve and will routinely ask stupid questions.

Thanks in advance .............

Duane Degn

This one can do 25A continuous with 35A surge.

30A is pretty darn powerful. I use cheap L298N boards from ebay on several of my robots but they're only good for a couple of amps.

Pololu has a bunch of H-bridge boards. They may have something you can use.

If you search the Parallax forums (theres a link to Rich's search in post #1 of my index (see signature)) you'll likely find several h-bridge circuits. You could also search Letsmakerobots.com. I know there are several H-bridge circuits on that site.

Frankfern123

Hi everyone, thanks for all the help. I found this link and I'm building it now. I think this may work out very well for my project.


Need an opinion though, should I use optoisolators to drive this ???


http://www.pyroelectro.com/tutorials/h_bridge_4_transistor/index.html

Beau Schwabe

You don't need Opto-Isolation, but I would place a 100k resistor to ground on both inputs as a safety precaution during 'floating' inputs. (i.e. during powerup) Since you are using a Propeller and the output of the I/O's are 3.3V, I would lower the 10k resistor on the inputs to 4.7k instead.