REFLECTOR: Source for LED based annunciator parts

Ron Brown romott at adelphia.net
Wed Apr 20 13:15:55 CDT 2005 

I mounted a 140 degree Klixon switch on the aero shaped pitot holder, just 
above the inside of the fuselage.  I have it wired in the ground leg of the 
Pitot heating element and it opens automatically at 140 degrees and opens 
the path to ground.  Then the wire between the Pitot and the Klixon goes to 
a LED.  If the LED is on, it indicates that the pitot is at over temp.

I have tested it - it works.  Opens while the pitot is on and the plane is 
not moving.  But when in the air, the air flow keeps the pitot cool enough 
so that the Klixon does not open.

Ronnie

----- Original Message ----- 
From: "Hiroo Umeno" <humeno at microsoft.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Wednesday, April 20, 2005 1:42 PM
Subject: RE: REFLECTOR: Source for LED based annunciator parts


For those who are flying with Vacuum, it would be a good idea.  My plane
is all electronic so I am adding the "STBY BTT" in yellow to indicate
that my EFIS is running on backup battery.

How are you sensing the Pitot Heat temp?  Mine does not have any sensor
that will report the actual temperature of the unit.  I guess I could
embed a thermo-couple at the base of the Pitot to measure the temp of
the plastic there.

Hiroo

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Ron Brown
Sent: Wednesday, April 20, 2005 10:23 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Source for LED based annunciator parts

Hirro, let me suggest a couple more:

LOW VACUUM (for those of us still doing the suck and blow stuff)
LOW FUEL ( either tank less than 5 gallons)

I also have a high PITOT TEMP due to the fact that the pitot can melt
itself
out of the fiberglass/epoxy mount while sitting on the ground.

Ronnie

----- Original Message ----- 
From: "Hiroo Umeno" <humeno at microsoft.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Wednesday, April 20, 2005 11:54 AM
Subject: RE: REFLECTOR: Source for LED based annunciator parts


I was thinking of a scheme like the following.

Safety of flight items: RED letters.
SUMP LOW
OIL PRES
OIL TEMP
LOW VOLT
DOOR

Precautionary Notices: YELLOW letters
SPD BRK
FUEL BAL

Informational: GREEN letters
PITOT HT
LDG LITE

In general, under day VFR flight, there should not be any lights on the
annunciator.

No Light = All is well.
Yellow = Take Note.
Red light = Immediate Action is required.

For me, I would not want indicators for entertainment system, computer,
audio, video, etc on the front - center in my line of sight.  The only
thing I want on that location is relevant to flight operations.  I also
don't want lights that will stay on under normal operation since that
will train me to ignore some lights and I am afraid I will get
complacent about stuff lighting up on my panel.

I am also planning on putting in a dimmer on the green light so that
they can be dimmed during night flight.  No dimmer on yellow and red
since they are the ones I really want to stand out.

Any opinions?

Hiroo

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Brian Michalk
Sent: Wednesday, April 20, 2005 7:43 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: RE: REFLECTOR: Source for LED based annunciator parts

The switches I posted can be internally lit on and off.  It's up to the
user
to wire up the indicator properly.  I plan on different colors.  Right
now
everything is red(off)/green(on).  Just pop the lens and swap out the
bicolor LED to change colors.

I was thinking of a scheme like this:
ON, and should normally be ON  - green
ON, and should normally be OFF - orange
OFF, and should normally be ON - red
OFF, and should normally be OFF - blue

Then there are the "don't cares", like computer, entertainment, perhaps
lights.  I haven't figured out what colors those should have.

There should be some good military or ISO standards for this sort of
thing.
Anyone know?

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Craig and/or Denise Woolston
Sent: Tuesday, April 19, 2005 11:45 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: RE: REFLECTOR: Source for LED based annunciator parts

Not completely sure.  You might be able to replace the legend cap with a
"clear" cap and then with positive font see the label.  But that is
another
engraving charge.  My plan on annunciators was to match the military
convention of dead font, negative illumination.  The only light that is
in
positive convention is the "master caution".  I like your idea though as
dual use legend and indicators.

A friend of mine in a RV-6 offered up the counter to that which was,
things
that are set, are soon forgot.  His example is the fuel boost pump.
It's
great to have the indicator by the switch, but unless that indicator is
staring you in the face, more often then not, you are 1 hour into the
flight
and remember you still have the boost pump on.

My plan on the pitot heat, autopilot on, high boost, start, was to use
the
AML31 switch which will illuminate when on.  And I can get a plastic
guard
for the start switch.

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of KeithHallsten
Sent: Tuesday, April 19, 2005 9:15 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Source for LED based annunciator parts

Craig,

I would be interested in "DOOR OPEN" and "LOW SUMP" in red positive, I
like
the "dead front" feature for those.

I'm not so keen on the "dead front" for "BRAKE DWN" in yellow negative,
and
"PITOT HT" in green negative.  I have been thinking of placing those
annunciators immediately adjacent to the associated toggle switches as
switch labels, so I would like the legend to be readable whether the
annunciator were on or off.  Is there another model that would provide
that?

Keith Hallsten
XL-FG4 in Roseville, CA


----- Original Message ----- 
From: "Craig and/or Denise Woolston" <cdwoolston at verizon.net>
To: "'Velocity Aircraft Owners and Builders list'" <reflector at tvbf.org>
Sent: Monday, April 18, 2005 8:25 PM
Subject: RE: REFLECTOR: Source for LED based annunciator parts


> How timely.  I just went through getting a quote from the same people
Brett
> used (FMW Distributors) and the Honeywell AML59 annunciators are
reasonable
> (6.92 ea) it's the minimum (5) and engraving charges ($15 per label)
that
> are adding up.  But if a couple of us went in together we could offset
the
> engraving charges.  Do I have any takers, I'll put the order together
and
do
> the logistics if anyone interested.  John and I need our soon, so this
is
> something I would want to do in the next two weeks or so.
>
> Here is our current list, but were open to negotiating labels and
colors
to
> combine more orders.  Remember you we get 9 characters and either red,
> yellow or green.
>
> RED Annunciators
> DOOR OPEN
> LOW SUMP
> BRAKE DWN
> ENGINE
>
> Yellow Annunciators
> CAUTION
> LOW MAIN
> LOW ESTL
> XFEED
>
> Craig
> XL-FG5 in Palmdale, CA
>
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
On
> Behalf Of Brett Ferrell
> Sent: Monday, April 18, 2005 4:57 PM
> To: 'Velocity Aircraft Owners and Builders list'
> Cc: humeno at hotmail.com
> Subject: Re: REFLECTOR: Source for LED based annunciator parts
>
> Hiroo -
>
> I got the Honeywell Microswitches from FMW Distributors.  They're a
little
> pricey, but they're nice.  I worked with Tyler there.
>
> FMW Honeywell page - http://www.fmw411.com/AML%20Catalog.htm
> You can check mine out at http://www.velocityxl.com/Electrical.htm
>
> Brett
>
> ----- Original Message ----- 
> From: "Brian Michalk" <michalk at awpi.com>
> To: "'Velocity Aircraft Owners and Builders list'"
<reflector at tvbf.org>
> Sent: Monday, April 18, 2005 10:37 PM
> Subject: RE: REFLECTOR: Source for LED based annunciator parts
>
>
> > Let me clarify.
> >
> > Identical to each other, not the switch you referenced.
> > I wanted all of my switches to be internally lit, no matter if they
are
on
> > or off.  If you go with bi-color LED's, you can wire it up so that
> > pressing
> > the switch causes it to change color.  All of my switches are this
way
> > that
> > drive remote solid state relays.  My critical switches, like
magneto,
> > starter, etc. are on a sub-panel that I engraved on my machine.
They
are
> > not internally lit, they are the sturdy toggle type.
> >
> > ________________________________
> >
> > From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
On
> > Behalf Of Brian Michalk
> > Sent: Monday, April 18, 2005 7:32 PM
> > To: 'Velocity Aircraft Owners and Builders list'
> > Subject: RE: REFLECTOR: Source for LED based annunciator parts
> >
> >
> > Oh yeah.
> >
> > Those are difficult, if not impossible to find.  They also sell one
that
> > is
> > exactly identical ... actually IS the switch combination for the ACU
> > annunciators.  Expect to pay somewhere between $30 to $50 for that
switch.
> >
> > I did the next best thing, and went with indicators and switches
from
EAO,
> > or NKK.  They are the same size and look identical.
> > http://www.newark.com/product-details/text/CD121/5093.html
> > http://www.alliedelec.com/catalog/pf.asp?FN=728.pdf
> >
> >
> > ________________________________
> >
> > From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]
On
> > Behalf Of Hiroo Umeno
> > Sent: Monday, April 18, 2005 4:20 PM
> > To: Velocity Aircraft Owners and Builders list
> > Subject: REFLECTOR: Source for LED based annunciator parts
> >
> >
> >
> > Hello folks,
> >
> >
> >
> > What have you done for your annunciators on the instrument panels?
Up
to
> > this point, I had some naked LEDs mounted on the panel through a
hole
but
> > they just look crummy.  I would like to put in annunciators with
> > letterings
> > like "DOOR", "SUMP LOW", "SPD BRK" in a cluster above my PFD.
Honeywell
> > makes the perfect thing but I cannot seem to find anyone who sell
them.
> > Mouser, Digikey, etc comes out empty.
> >
> >
> >
> >
http://content.honeywell.com/sensing/prodinfo/manual/catalog/c30037.pdf
> >
> >
> >
> > Does anyone know of a supplier for these (or something similar)?
> >
> >
> >
> > Hiroo
> >
> >
> > _______________________________________________
> > To change your email address, visit
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> >
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> >
>
>
> _______________________________________________
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>
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