Stepper Re: [sdiy] And another amp question

[Cynthia Webster]

> Although the only
> control on the entire amp besides the power switch is the volume knob. It
> looks like it simply powers the motor in one or the other directions but
> then what's the shift register for?

Hi Batz!

Could the shift register be there
because it's a stepper motor on the Volume knob?

It could be taking a single pulse and cycling it to the different windings
of the motor somehow using the shift register as a stepper motor driver?
(usually, you can feel the multiple detents in a stepper's windings by
slowly turning the motor shaft and feeling  carefully).


On the other hand it could it could be a servo and the shifty register is
part of an unusual servo driver?

Anyway, Stepper Motor Driver - that's what I thought it might be

Best to ya' 

Cynthia

> If anyone's got an idea about this I'd be most grateful.
> 
> Thanks in advance.
> 
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