[SML] Cheapie DC motor controlled by PWM?

[Jerry Durand]

The easiest motors to speed control are DC brushed.  Not brushless, WITH
brushes.  Speed/direction control is simple.  If you have a DC dimmer
that works at the motor voltage, you're there.  Add a DPDT relay to a
second channel on the dimmer set to non-dim and you have direction control.

For small motors that spin fast with little torque, look at N-20 size. 
For slow with power, that same N-20 with a gearbox works well.  I
recently designed one into a product and have to run the motor at way
lower than full power so it doesn't break anything.

For fast, higher torque look for drone motors.

On 08/26/2016 12:42 PM, Jon Ares via Stagecraft wrote:
> Howdy folks... I'm contemplating a gag with a spinny dial thing,
> driven by a lightweight DC motor, ideally PWM-controlled.... not much
> in the way of strength needed (it's not moving any people, scenery,
> etc - just spinning dials). Think clock motor... but no need for
> indexing or such.....
>
> What am I looking for?
>
> Again, something with little power/torque, but ideally
> speed-controllable.  And cheap.
>
> TIA....
>

-- 
Jerry Durand, Durand Interstellar, Inc.
www.interstellar.com
tel: +1 408 356-3886

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