[TriEmbed] Running old hard drive motors with a MC: DRV11873 and DRV family ICs

[Scott Hall]

All,
I have been taking apart those old SCSI-3 harddisks (I dropped about 100 of off
over at Splat*Space) and it is quite easy, even maintaining the connector
pigtails.  The only thing is, the motor bearing is machined into the case
itself.  That means cutting the (aluminum) case to a manageable size -- not an
easy task at the moment.

By the way, Elektor magazine specifically has an article with a circuit for
driving these motors.  The input to the circuit is servo drive signals like
those from an radio-controlled receiver.  And there are standard library
functions for that for all of the microcontroller boards (Launchpad, Arduino,
R-Pi/Python, etc).  You can use an RC throttle to control the speed of the motor
-- and through component selection select the maximum speed of a motor.

On 07/24/2014 11:02 AM, Pete Soper wrote:
> One more alternative that just occurred to me: identify and isolate the
> controller chip in a drive or fan, look up it's specs and patch some kind of
> control into it while it's wired to your motor.
>
> And I simply failed to include another, easier alternative if something off
> the shelf would do. There are RC model-related PWM controllers that you can
> simply connect to your motor and they will just immediately work. I think I
> subconsciously filtered this out by figuring you guys have the usual academic
> budgeting levels for a project like this. :-)
>
> -Pete
>


-- 
Scott G. Hall
Raleigh, NC, USA
ScottGHall1 at GMail.Com

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