USB Motor Speed control..

[Lord-Data]

how easy/tricky is it to build a USB device that can control a motor speed?
Just a smal electric motor that needs to ramp between a few different RPMs,
no specific precision required..; just needs to be able to start/stop the
motor, and change its speeds to a few different preset levels ..

I'm presuming that driver interface would be the harder of the 2 parts of
dev (driver and hardware) .. What kind of hardware is best used to design a
circuit like this?

Any pointers for pre-made circuits like this?

Thanks in advance!

 

[Ken Taylor]

"Lord-Data" <data@ihug.com.au> wrote in message
news:43197344$0$15502$61c65585@un-2park-reader-02.sydney.pipenetworks.com.au...

how easy/tricky is it to build a USB device that can control a motor
speed?
Just a smal electric motor that needs to ramp between a few different
RPMs,
no specific precision required..; just needs to be able to start/stop the
motor, and change its speeds to a few different preset levels ..

I'm presuming that driver interface would be the harder of the 2 parts of
dev (driver and hardware) .. What kind of hardware is best used to design
a
circuit like this?

Any pointers for pre-made circuits like this?

Thanks in advance!


This may be fairly definitive for you:

http://www.eletrica.ufpr.br/lamar/Projetos/luva/G6_3_Final_Report_2002.pdf

Cheers.

Ken