motorised pots -Reply

[Jeremy Brookes]

>Suggestion: How about the little servos that are
>used by Radio Control hobbyists? ~US$30 each...
>they are quite strong and I think all the feedback
>controls are self contained.

Good idea. These need just three wires, +5V, 0V and a control signal which 
is a PWM signal. I used to have the figures on what the PRF and pulse width 
should be. Downside to them is that you would have to disable the drive to 
them once you reached position and even then they would still be quite 
stiff to move due to the gearing in them.

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