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    Re: Digital Sextant
    From: Bruce Cutting
    Date: 2020 Sep 11, 17:45 -0600

    I agre that the electronics package should be remote - probably should
    also be a smart phone app -only down side is that both are required to
    be available and in working condition.
    Quoting Don Seltzer :
    > The sensor is probably an optical encoder. I once toyed with the idea of
    > making a sextant instrumented in that manner.  It would have required a 15
    > bit encoder to resolve 1 arc minute.  Absolute encoders of that resolution
    > were prohibitively expensive, particularly in a package that small.
    > Incremental encoders, which would have to be properly zeroed at turn on
    > would be more likely candidates, but would still not be cheap.
    > The expensive, custom made, bulky electronics package mounted on the
    > sextant does not make a lot of sense.  Better to design a bluetooth
    > interface to a smart phone and put all of the functionality into an app.
    > Don Seltzer
    > On Thu, Sep 10, 2020 at 12:40 PM Greg Rudzinski 
    > wrote:
    >> Interesting arrangement but... a bit bulky and doesn't sense vertical. I
    >> didn't see in manual any description of how the arc sensor functions. Can
    >> it take a wave and keep on ticking ?  I'm thinking that a digital camera
    >> system would be better.
    >> Greg Rudzinski
    >> View and reply to this message
    > View and reply to this message:
    > http://fer3.com/arc/m2.aspx/Digital-Sextant-Seltzer-sep-2020-g48559

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