Stepper Motor w/ OOPic

[JonMarkGo]

Can anyone recommend a stepper motor and driver that's tried and proven with the OOPic-R?

[hazzer123]

As long as the OOPic can output 5V TTL signals from its pins, pretty much any stepper driver will interface with it. The driver can't tel the difference between a square wave from an ATmega chip or an OOPic.

Picking a stepper motor that matches the driver is a bit different. There are drivers suited for certain motors.

If you want more help, give us some more information on the size of the stepper you want to use. The torque, voltage, current requirements/limits would all be nice.

[JonMarkGo]

I'd like it to be able to drive 4 wheels on a relatively light robot (plastic frame).I'm not yet sure on weight/torque requirements, etc.

[JonMarkGo]

Will this motor: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=403-1006-ND work with this driver chip: http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=497-2936-5-ND ?

[benji]

there are unipolar and there are bipolar steppers
assuming you are using the most common which is unipolar the ULN2003A can work for you as a driver
the unipolar has 6 wires , you connect 2 to vcc and the other 4 to the driver ic with com connected to vcc and E to gnd
the microcontroller outs should go to the base of the darlington pairs and the collectors to the motor's coils

[Admin]

I'd like it to be able to drive 4 wheels on a relatively light robot (plastic frame).I'm not yet sure on weight/torque requirements, etc.

http://www.societyofrobots.com/robot_faq.shtml#select_motor