LED Push Buttons [Archive]

matta757

11-29-2009, 07:04 PM

Hi all,

I am looking at buying some of these push buttons with a built in LED light from Opencockpits (see link).

http://www.opencockpits.com/catalog/pushbutton-with-pi-118.html?image=0

Does anyone own any of these? Could you possibly give me the dimensions of the button? It doesn't have any listed on the website. I want to use them for my 757 overhead, mainly for fuel pumps and hydraulic switches.

Also, what does it take for the LED to work? Does it simply come on whenever the button is pushed? Does it require additional power? I intend to connect them to one of Leo's joystick controller boards. Any help you might be able to contribute would be greatly appreciated!

Best regards,

Matt

N242AM

11-29-2009, 08:36 PM

Hi Matt,

I believe those are Mountain switches. You might want to consider buying them from Mouser.com. Located in Texas. Not sure who would be the cheapest.

Mouser does have downloadable .pdf data files for all their hardware.

I used that switch a lone time ago in an Airbus FCU. From memory, the LED illuminates when the switch is in the ON position. There were four wires on the back. Two for the switch and two for the LED power.

I'll look and see if I can provide you a link to the switch at Mouser.

Link to the switch: http://www.mouser.com/ProductDetail/Mountain-Switch/107-6612/?qs=sGAEpiMZZMvxtGF7dlGNpsYc4M%252brk0HxDrL07hEox44%3d

Link to the .pdf: http://www.mouser.com/catalog/specsheets/MS-100226.pdf

Please do some research on these switches. They are for printed circuit board mounting. When I used them, I had to glue them into the plexiglass panel. Not the best application but it did seem to work.

Here is a link to an LED tutorial. http://www.theledlight.com/ledcircuits.html
Using a resistor is very important with LEDs. It limits the current flow. Not using a resistor will burn out the LED the first time you apply power. Sometimes the interface board designer will include the resistor in the board so an additional resistor will not be needed.

matta757

11-29-2009, 10:13 PM

Thanks for the great reply! I am a little concerned about the difficultly level of installing these switches. You said you used them before, but is there another type that you would recommend instead? Looking at the dimensions, they are a little small for what I need anyways, so now I am looking for alternate options. I need switches that are preferably square and around 2cm. All the ones I can find are around 1cm. I appreciate your help!

Matt

Hi Matt,

I believe those are Mountain switches. You might want to consider buying them from Mouser.com. Located in Texas. Not sure who would be the cheapest.

Mouser does have downloadable .pdf data files for all their hardware.

I used that switch a lone time ago in an Airbus FCU. From memory, the LED illuminates when the switch is in the ON position. There were four wires on the back. Two for the switch and two for the LED power.

I'll look and see if I can provide you a link to the switch at Mouser.

Link to the switch: http://www.mouser.com/ProductDetail/Mountain-Switch/107-6612/?qs=sGAEpiMZZMvxtGF7dlGNpsYc4M%252brk0HxDrL07hEox44%3d

Link to the .pdf: http://www.mouser.com/catalog/specsheets/MS-100226.pdf

Please do some research on these switches. They are for printed circuit board mounting. When I used them, I had to glue them into the plexiglass panel. Not the best application but it did seem to work.

Here is a link to an LED tutorial. http://www.theledlight.com/ledcircuits.html
Using a resistor is very important with LEDs. It limits the current flow. Not using a resistor will burn out the LED the first time you apply power. Sometimes the interface board designer will include the resistor in the board so an additional resistor will not be needed.

Skylane

11-30-2009, 04:26 AM

Hi Matt,

Maybe you find what you are looking for on http://www.conrad.com
Conrad does not have a representative in the US but the catalog is very detailed, brand and dimensions are availeble.
If you find a part you like, you can look for the part via Google to buy it in the US. Or have the parts send to you by someone on here.

Kind regards, Nico

Perik

11-30-2009, 06:51 AM

Hello Matt

You could try to make the Korry your self:

Look at the tutorial from Steve:

http://home.roadrunner.com/~mbecker/Overview/Entries/2008/12/5_Switch_notes_files/777%20switch%20notes3.pdf

There are also a couple of other Korry tutorials available in the Tutorial section, but for those you may need a CNC.

Besides that I agree with N242AM about www.mouser.com (http://www.mouser.com) - a great place to do shopping.

N242AM

11-30-2009, 08:33 AM

Hi Matt,

To be honest, that is one problem I have with those that sell panels only. You have to find a switch to fit the whole dimensions they cut in the panel. Sometimes a difficult and frustrating task.

I have no direct knowledge of a momentary switch that size which includes an LED. Mouser has a search function but I don't recall if metric size is an option.

Maybe someone else here has another idea like the Korry suggestion above.

matta757

11-30-2009, 08:38 AM

Hey guys,

Thanks for the replies. That korry pdf is VERY interesting... I might find myself doing that! I look at all the square switches on Mouser and all of them are around 1cm square, so I was thinking of just putting them behind a cut out 2cm square piece of MFD, sort of like the korry thing.

Thanks again for all the input!

Matt

Perik

11-30-2009, 11:32 AM

Matt, here is another great Korry tutorial plus a lot more
from Jeroen op den Akker:

http://home.hccnet.nl/jwopdenakker/building%20tip.html

twisted8

11-30-2009, 04:01 PM

I used the opencockpits switches and yeah not very close to a real korry switch but they are easy to implement.

Matt, here is another great Korry tutorial plus a lot more
from Jeroen op den Akker:

http://home.hccnet.nl/jwopdenakker/building%20tip.html

This is looks a great tutorial but what has stopped me from trying it, is getting the cubes made so I did some googling and found some 3/4" (19mm) acrylic cubes. Looks like it could work:
http://www.jmkdisplays.com/shapes.html
or
http://www.tapplastics.com/shop/product.php?pid=136&

Will have to give this a try some day!

matta757

11-30-2009, 11:01 PM

Thank you everyone for this input!

Alright, now here is my question; regarding the Korry button setup in particular, how would I go about wiring the buttons so as to make the LEDs work? What kind of power source (built-in, outside or otherwise) would be required to lite them? I am planning on having a total of about 20 on my overhead that would need powering. Also, with the Korry setup, how do you setup the LEDs to only illuminate when the button is pushed on? I know these are a lot of questions and am not expecting an easy answer, but any help would be very much appreciated!

Regards,

Matt

Drewsta

12-01-2009, 02:25 AM

phil744

12-01-2009, 05:58 AM

Hey Matt, I'm in the same boat and about to attack my overhead for the 767-300. I have an alternative for you that I was put on to by Henry and I believe they are quite easy to wire up. I will be buying these shortly and trying them out as they are the cheapest Led pushbutton for what you and I would be after. I don't know the exact dimensions but I'm guessing close to 2x2 cm.

http://www.mycockpit.org/photopost/data/500/thumbs/Led_pushbutton.jpg (http://www.mycockpit.org/photopost/data/500/Led_pushbutton.jpg)

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=280420828578&ssPageName=STRK:MEWAX:IT

Matt, they're easy to wire. If you are holding the switch with the led on the bottom, the pin layout is like this:

a b c
d e
f g h

d and e are the LED connections (e is the cathode) and f and h is the switch connection.

I think these will achieve a satisfactory result once wired up.

Best of luck Matt.
Drewsta

Those switches i also use myself, they require a 17.7mm by 17.7mm panel cut out size, or in other words a perfect match for the Boeing MCP switches, also perfect for all the Airbus Eaton switches, feel good also, such a damn shame they dont do a dual illuminated version, however they come apart quite easy and with a bit of wire and a home made PCB board you can get them to dual illuminate, still toying with the idea of making a kit that converts them to dual illumination.

But still to small for the overhead and MIP Korrys for the 767

Drewsta

10-27-2010, 05:06 PM

Those switches i also use myself, they require a 17.7mm by 17.7mm panel cut out size, or in other words a perfect match for the Boeing MCP switches, also perfect for all the Airbus Eaton switches, feel good also, such a damn shame they dont do a dual illuminated version, however they come apart quite easy and with a bit of wire and a home made PCB board you can get them to dual illuminate, still toying with the idea of making a kit that converts them to dual illumination.

But still to small for the overhead and MIP Korrys for the 767

Hi Phil, with these LED pushbuttons, I thought they were supposed to go on and off when you pressed the button? Can they change their state or is that only with o/c and leeksecon? Also do you have any Cancel/recall and backlit panels for the 767?

thanks
Drewsta

EZYTWV

09-09-2017, 04:49 PM

Hi Philip your dual LED Korry switch looks fantastic. I've actually bought the same KD21 switches and would very much like to modify them like you have. Could you please share some more info on how you've managed such a great job? Both the inside of the KD21 modification and the pushbutton cap. I do have a CNC 3040T.

Many thanks!

Vincent