AVR-Chat

I'm considering all sorts of low-power options for providing an
analogue indication (moving needle or bar). Typical ammeters draw
current and the quantity I want to indicate isn't directly available
as a current... it's number-crunched. Scale will be semi-log.

At first, I looked at small stepper motors but they're simply
over-kill.  During my search, I've stumbled across radio-control
servos... which are quite popular in robotics and the driving
technology is certainly well known in AVR circles.

The question is; has anybody used these servos for instrumentation?

The accuracy doesn't need to be high; it only needs to provide an
at-a-glance feel for the operator. The indicator only needs to be
"accurate" at one point, which could be calibrated at "boot time".
I expect the AVR controlling the servo to have a table of position
vs value... with linear interpolation for points inbetween.

Any pointers to useful information such as steady-state current,
holding torques, etc will be appreciated. I Googled but got around a
million hits... or none.

-- 
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