[simpits-tech] Zero point on a two needle altimeter

Stig Joergensen simpits-tech@simpits.org
Sat, 26 Oct 2002 14:29:31 +0200


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This was what i was thinking - and this solution also works on any other
gauges ADI HSI etc....
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I thought though, on the big need make the disc slightly bigger and have
a 5 holes in the disc, that way you can "see" if the needle is in a 90
deg. pos or even better add even two "rings" and you also have a signal
when this needle is in 12 oclock...
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/Stig
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-----Original Message-----
From: Johan Nauwelaertz de Ag=E9 [mailto:johan.nauwa@gavle.to]
Sent: 26. oktober 2002 10:14
To: simpits-tech@simpits.org
Subject: [simpits-tech] Zero point on a two needle altimeter


Maybe a way to feedback a stepper in a 2 needle altimeter.
=20
I'm planning to use two disks, each with a hole aligned with the needle.
When both needles are at 0 position, the photo interuptor get signal
through the holes in disk. A counter will also help to reset altimeter
as fast as possible, i.e. If counter is more than 5000, continue to
count upwards to 10000, if less than 5000, reward to 0,
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Any thoughts?
=20
=20
Johan Nauwelaertz de Ag=E9
Sweden


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