[simpits-tech] phidgits + Building Gauges
Rod Dale
simpits-tech@simpits.org
Mon, 28 Oct 2002 14:56:11 -0800
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No problem with the servos. These are used to drive needles that require =
less than 360 degrees travel. Most aircraft gauges like this , ie =
airspeed ind & RPM etc don't need to travel as fast as the altimeter. So =
servos work well in that situation.
Rod
----- Original Message -----=20
From: Joseph Daigle=20
To: simpits-tech@simpits.org=20
Sent: Sunday, October 27, 2002 11:14 AM
Subject: Re: [simpits-tech] phidgits + Building Gauges
I would guess the stepper motor would be slow to catch up, but how =
responsive were the servos?
Joseph Daigle
<original>
From: "Rod Dale" <rodd@castle.net.au>
To: <simpits-tech@simpits.org>
Subject: Re: [simpits-tech] phidgits + Building Gauges
Date: Sun, 27 Oct 2002 21:16:37 -0800
Reply-To: simpits-tech@simpits.org
>Yes, that's John Dunkley at =
http://www.senet.com.au/~dunkleyj/menu.htm
>It's his setup that I tried. As I said it works well except for the =
speed of
>the altimeter.
>Rod
----- Original Message -----
From: Ben Jones <bjones@pipecomp.com.au>
To: <simpits-tech@simpits.org>
Sent: Saturday, October 26, 2002 6:34 PM
Subject: RE: [simpits-tech] phidgits + Building Gauges
> rod ,
> there has been a aussie who is making a 747 sim or something in =
australia
out of a ford car shell,
>
> i cant think of the site at the moment i'll have to look for it, but =
they
used a standard radio controlled servo running of a basic stamp board, =
with
a PI hanging off the shaft to report a zero point , aparently it works =
well.
>
>
> BEN JONES
> -----------------------------------------
> bjones@pipecomp.com.au
> ------------------------------------------------
>
>
> -----Original Message-----
> From: Rod Dale [mailto:rodd@castle.net.au]
> Sent: Saturday, 26 October 2002 11:35 PM
> To: simpits-tech@simpits.org
> Subject: Re: [simpits-tech] phidgits + Building Gauges
>
>
> There's a small electronic device called a Photo Interrupter (PI) =
that
could
> be used. This consists of an IR LED (Infra Red) on one side and a
> photo-transistor on the other. These are used in printers to =
indicate
where
> the carriage is. All you need to do is put a small piece of plastic =
on the
> shaft of the stepper motor and each time this plastic piece passes =
between
> the two parts of the PI it cuts the IR to the transistor and signals =
the
> controller (PC, Basic Stamp, Phidgit etc) that the motor has turned =
one
> revolution. If you could set up a counting program then you keep =
track of
> the revolutions and hence the start point and any number of other =
points
> too.
> I got hold of a heap of old printers and stripped them of these =
devices
and
> the stepper motors - ready for this sort of thing.
> Can anyone add to this theory ?
> Rod
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<DIV><FONT face=3DArial size=3D2>No problem with the servos. These are =
used to drive=20
needles that require less than 360 degrees travel. Most aircraft gauges =
like=20
this , ie airspeed ind & RPM etc don't need to travel as fast as the =
altimeter. So servos work well in that situation.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Rod</FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: =
0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A href=3D"mailto:josephdaigle@taurusnet.tzo.com"=20
title=3Djosephdaigle@taurusnet.tzo.com>Joseph Daigle</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A=20
href=3D"mailto:simpits-tech@simpits.org"=20
title=3Dsimpits-tech@simpits.org>simpits-tech@simpits.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, October 27, 2002 =
11:14=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: [simpits-tech] =
phidgits +=20
Building Gauges</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>I would guess the stepper motor =
would be=20
slow to catch up, but how responsive were the servos?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Joseph Daigle</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2><original></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>From: "Rod Dale" <<A=20
href=3D"mailto:rodd@castle.net.au">rodd@castle.net.au</A>><BR>To: =
<<A=20
=
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A>>=
<BR>Subject:=20
Re: [simpits-tech] phidgits + Building Gauges<BR>Date: Sun, 27 Oct =
2002=20
21:16:37 -0800<BR>Reply-To: <A=20
=
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A><BR>=
<BR>>Yes,=20
that's John Dunkley at <A=20
=
href=3D"http://www.senet.com.au/~dunkleyj/menu.htm">http://www.senet.com.=
au/~dunkleyj/menu.htm</A><BR>>It's=20
his setup that I tried. As I said it works well except for the speed=20
of<BR>>the altimeter.<BR>>Rod<BR><BR>----- Original Message=20
-----<BR>From: Ben Jones <<A=20
=
href=3D"mailto:bjones@pipecomp.com.au">bjones@pipecomp.com.au</A>><BR>=
To:=20
<<A=20
=
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A>>=
<BR>Sent:=20
Saturday, October 26, 2002 6:34 PM<BR>Subject: RE: [simpits-tech] =
phidgits +=20
Building Gauges<BR><BR><BR>> rod ,<BR>> there has been a aussie =
who is=20
making a 747 sim or something in australia<BR>out of a ford car=20
shell,<BR>><BR>> i cant think of the site at the moment i'll =
have to=20
look for it, but they<BR>used a standard radio controlled servo =
running of a=20
basic stamp board, with<BR>a PI hanging off the shaft to report a zero =
point ,=20
aparently it works well.<BR>><BR>><BR>> BEN =
JONES<BR>>=20
-----------------------------------------<BR>> <A=20
=
href=3D"mailto:bjones@pipecomp.com.au">bjones@pipecomp.com.au</A><BR>>=
=20
=
------------------------------------------------<BR>><BR>><BR>> =
-----Original Message-----<BR>> From: Rod Dale [<A=20
=
href=3D"mailto:rodd@castle.net.au">mailto:rodd@castle.net.au</A>]<BR>>=
Sent:=20
Saturday, 26 October 2002 11:35 PM<BR>> To: <A=20
=
href=3D"mailto:simpits-tech@simpits.org">simpits-tech@simpits.org</A><BR>=
>=20
Subject: Re: [simpits-tech] phidgits + Building =
Gauges<BR>><BR>><BR>>=20
There's a small electronic device called a Photo Interrupter (PI)=20
that<BR>could<BR>> be used. This consists of an IR LED (Infra Red) =
on one=20
side and a<BR>> photo-transistor on the other. These are used in =
printers=20
to indicate<BR>where<BR>> the carriage is. All you need to do is =
put a=20
small piece of plastic on the<BR>> shaft of the stepper motor and =
each time=20
this plastic piece passes between<BR>> the two parts of the PI it =
cuts the=20
IR to the transistor and signals the<BR>> controller (PC, Basic =
Stamp,=20
Phidgit etc) that the motor has turned one<BR>> revolution. If you =
could=20
set up a counting program then you keep track of<BR>> the =
revolutions and=20
hence the start point and any number of other points<BR>> =
too.<BR>> I=20
got hold of a heap of old printers and stripped them of these=20
devices<BR>and<BR>> the stepper motors - ready for this sort of=20
thing.<BR>> Can anyone add to this theory ?<BR>>=20
Rod</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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