Need help understanding the "signal" wire.  by MinnesotaState
Tags: signal, wire MinnesotaState is offline Aug24-13, 09:45 PM
P: 31 My servo,  Not sure if this servo requires AC or DC power.
What I really want to understand is the signal wire;
specifically how changing the input value either increases or
decreases the speed of the servo. I speak of input value because
I do not know if the EMF or the I is changing. I'd assume that
the EMF would remain constant & the change I would be
responsible for change in speed of the servo.  Perhaps it's best
that I understand how a varistor works? With a varistor, the + &
- leads have completed the circuit. You change the flow via
screwdriver or such. You can think of turning the screwdriver as
your signal, correct? How does this work? To me, it's either you
complete the circuit or you don't.  Btw, I believe the servo
requires AC. I standard 9Vdc didn't work. I ran the signal to
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