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Re: gEDA-user: OT - Joystick control of stepper or servo motors

On Jan 25, 2011, at 12:49 AM, David C. Kerber wrote:

> Thanks for the suggestions, DJ.  Unfortunately, there's really no room for a pc where I have the microscope set up, and most laptops don't even have parallel ports any more.  Plus running a full-blown pc just to drive a microscope seems like rather a  waste of electricity.

At Noqsi, we're starting to do jobs like this with an Armadeus board (http://www.armadeus.com/). Tiny Linux system with an attached FPGA for custom interfaces. Free/open software, firmware, and hardware. You could use the Linux USB infrastructure.

>> [mailto:geda-user-bounces@xxxxxxxxxxxxxx] On Behalf Of DJ Delorie
>> I think steppers are the right way to go.  Easy to operate, 
>> easy to position, go round and round more than once.  
>> Controlling the steppers is easy, you just need a few 
>> N-mosfet transistors (or a dual H-bridge chip, I suppose).  

I agree.

John Doty              Noqsi Aerospace, Ltd.

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