Bendix datalink panel as cockpit keybord

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fly_ebos
Posts: 437
Joined: 12 May 2011, 07:49
Location: Leuven, Belgium

Bendix datalink panel as cockpit keybord

Postby fly_ebos » 26 Aug 2011, 13:16

Hi,

In my search through ebay, I came across a Bendix datalink panel and that made me think.
It has all 26 keys, arrows, space, shift,....so could something be done to interface this into my cockpit and get rid of the keyboard?
What the heck, it only costed me 30 dollars so I went for it.

Image

One week later I received the item and got started unscrewing the box, removing all unnecessary hardware, untill I got to the keypad itself.
To my great surprise it was wired as a 'simple' keyboard matrix. Wiring matrixes was new to me, so a lot of trial and error was involved.
But after half a day of trying I got the whole keypad working through a Pokeys card!

Image

From time to time this item pops up on ebay, usually sold by 'swift46', which I can highly recommend (it takes 7 days to get it from the USA to Belgium)
If you're interested, you can find the wiring scheme below:

The flat ribbon cable that comes out of the panel needs to be cut and then shrink extension wire to it to hook it up with any interface device (Pokeys I recommend as it requires no diodes for matrixes).

Image

The ribbon consists of 20 wires but you don't need them all as some are for backlighting.
I'll number the cables 1-20, starting left to right

cable1=column G
cable2=row1
cable3=column F
cable4=row 2
cable5=column E
cable6=
cable7=
cable8=column D
cable9=
cable10=
cable11=
cable12=row 4
cable13=
cable14=
cable15=row 5
cable16=row 3
cable17=column A
cable18=column B
cable19=
cable20=column C

I use 5v for backlighting and that is sufficient. After an hour on it produces quiet some heat actually.
I did not register which remaining cables are combined but the bulbs used do not have polarity so you will have to try several combination and see which ones give you the best backlighting results. I ended up with a nicely lit up panel :D

Image

Hope this helps someone
Last edited by fly_ebos on 22 Jan 2012, 09:27, edited 3 times in total.
B737NG full cockpit, real liners, real FWD+ AFT overhead, FlyEngravity MIP
real Boeing TQ + pedestal
P3D and Prosim on Asus Z97-PRO Core i5 46900k@ 4,7Ghz 16GB DDR3-1600, Radeon R7 290
Second computer running display on Gigabyte 790FX-DS6, Athlon X2 250

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JWS
Posts: 1564
Joined: 18 Feb 2011, 19:24
Location: The Netherlands

Re: Cockpit keyboard

Postby JWS » 27 Aug 2011, 08:45

Looks interersting.

But what are the columns?
And what about a mouse?

JWS

fly_ebos
Posts: 437
Joined: 12 May 2011, 07:49
Location: Leuven, Belgium

Re: Cockpit keyboard

Postby fly_ebos » 27 Aug 2011, 08:54

Johan,

A normal switch is interfaced with 1 ground and 1 positive. In a matrix the keyboard is divided in rows and columns and a key is identified through is specific row and column position.
If you look on the pic the you see that key 'A' is being read as row1-column B. I wired all these to a Pokeys card and in the software you can easily make a matrix and define what kind of row or column an input is.
Then you can allocate keyboard codes to them.
B737NG full cockpit, real liners, real FWD+ AFT overhead, FlyEngravity MIP
real Boeing TQ + pedestal
P3D and Prosim on Asus Z97-PRO Core i5 46900k@ 4,7Ghz 16GB DDR3-1600, Radeon R7 290
Second computer running display on Gigabyte 790FX-DS6, Athlon X2 250

User avatar
JWS
Posts: 1564
Joined: 18 Feb 2011, 19:24
Location: The Netherlands

Re: Bendix datalink panel as cockpit keybord

Postby JWS » 27 Aug 2011, 09:00

I get it.

Why did you skip the back lighting?

JWS

PS it's Jan not Johan. ;)

fly_ebos
Posts: 437
Joined: 12 May 2011, 07:49
Location: Leuven, Belgium

Re: Bendix datalink panel as cockpit keybord

Postby fly_ebos » 27 Aug 2011, 09:29

Oeps sorry Jan!

I did not get to backlighting real panels yet. I have a whole bunch that I want to interface first and in a later stage see if the original backlight still works.
B737NG full cockpit, real liners, real FWD+ AFT overhead, FlyEngravity MIP
real Boeing TQ + pedestal
P3D and Prosim on Asus Z97-PRO Core i5 46900k@ 4,7Ghz 16GB DDR3-1600, Radeon R7 290
Second computer running display on Gigabyte 790FX-DS6, Athlon X2 250

fly_ebos
Posts: 437
Joined: 12 May 2011, 07:49
Location: Leuven, Belgium

Re: Bendix datalink panel as cockpit keybord

Postby fly_ebos » 26 Nov 2011, 18:00

Got the backlighting sorted out!

Image
B737NG full cockpit, real liners, real FWD+ AFT overhead, FlyEngravity MIP
real Boeing TQ + pedestal
P3D and Prosim on Asus Z97-PRO Core i5 46900k@ 4,7Ghz 16GB DDR3-1600, Radeon R7 290
Second computer running display on Gigabyte 790FX-DS6, Athlon X2 250

flyWJP
Posts: 8
Joined: 21 Jan 2012, 00:31

Re: Bendix datalink panel as cockpit keybord

Postby flyWJP » 21 Jan 2012, 00:42

Hi there!

Well thanks to your post, I too have one of these datalink modules. A couple of questions: Can you repost your photos? They don't appear in the thread any more. Also, how did you get the backlighting working? Which pins and what voltage?

Cheers,


FlyWJP

fly_ebos
Posts: 437
Joined: 12 May 2011, 07:49
Location: Leuven, Belgium

Bendix datalink panel as cockpit keybord

Postby fly_ebos » 21 Jan 2012, 08:32

I think i deleted the original pics. I will open the pedestal and make some new ones. Backlighting uses 5 volt and basically is the remaining cables. You will have to do some trial and error to see what gives you the best result.

Thomas
B737NG full cockpit, real liners, real FWD+ AFT overhead, FlyEngravity MIP
real Boeing TQ + pedestal
P3D and Prosim on Asus Z97-PRO Core i5 46900k@ 4,7Ghz 16GB DDR3-1600, Radeon R7 290
Second computer running display on Gigabyte 790FX-DS6, Athlon X2 250

flyWJP
Posts: 8
Joined: 21 Jan 2012, 00:31

Re: Bendix datalink panel as cockpit keybord

Postby flyWJP » 21 Jan 2012, 18:02

Thanks Thomas - I appreciate the effort of taking it out of your pedestal and re-shooting the photos.

Any plans to get the LCD display working?

Cheers,

FlyWJP

fly_ebos
Posts: 437
Joined: 12 May 2011, 07:49
Location: Leuven, Belgium

Re: Bendix datalink panel as cockpit keybord

Postby fly_ebos » 22 Jan 2012, 09:27

Updated the post with the pictures. If you have any questions, don't hesitate!
B737NG full cockpit, real liners, real FWD+ AFT overhead, FlyEngravity MIP
real Boeing TQ + pedestal
P3D and Prosim on Asus Z97-PRO Core i5 46900k@ 4,7Ghz 16GB DDR3-1600, Radeon R7 290
Second computer running display on Gigabyte 790FX-DS6, Athlon X2 250


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