Society of Robots - Robot Forum

General Misc => Misc => Topic started by: MaltiK on October 06, 2008, 05:44:22 PM

Title: How do I go about external motors on my Picaxe 28x1
Post by: MaltiK on October 06, 2008, 05:44:22 PM

Ok heres the scenario
A, and B connections taken by the main wheels for the robot (uses an L293D)
I want to drive 4 geared motors 3 are one direction, so no need for a motor chip. They have a V wire and a G wire, obviously, so if I were to control these via high and low, would I connect the V to an output? and the G to a ground?

Title: Re: How do I go about external motors on my Picaxe 28x1
Post by: Admin on October 08, 2008, 04:50:35 AM

A microcontroller can only supply a few milliamps, while motors require hundreds of milliamps minimum. You will have to use a motor driver . . .

If you only need one direction and want to save money/space, you can also use a MOSFET. You control the transistor gait with the microcontroller output pin.