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  #101  
Old March 2nd, 2016, 10:58 AM
Azarur
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AZ
LR 1984 110
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Back to our Regularly Scheduled Programming: Computer

The next few weeks saw vertiginous progress in development of our computer.
We programmed the interface as well as the sensor bank to feed into our boards:
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  #102  
Old March 2nd, 2016, 11:54 AM
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Brian
86 D110 SW
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speechless...in an amazed good way
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  #103  
Old March 2nd, 2016, 12:48 PM
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Mark Miller
1994 Defender 90NAS #1258
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Holy Sh#T! squared!
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  #104  
Old March 2nd, 2016, 01:11 PM
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Adam
1985 130 Gen IV
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Yeah. I had to stop reading made my brain hurt. Guess we know who to PM if we are trying to wire up a relay.
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  #105  
Old March 2nd, 2016, 01:41 PM
Azarur
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LR 1984 110
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Quote:
Originally Posted by speedpin View Post
Yeah. I had to stop reading made my brain hurt. Guess we know who to PM if we are trying to wire up a relay.
I also give free medical advice and fix Christmas lights
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  #106  
Old March 2nd, 2016, 01:44 PM
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Adam
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Originally Posted by Azarur View Post
I also give free medical advice and fix Christmas lights

Good to know
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  #107  
Old March 2nd, 2016, 03:38 PM
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Raub A.
1987 D110 Tithonus
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Wow.
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  #108  
Old March 2nd, 2016, 08:50 PM
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John Lindsay
1986 Land Rover 90, 3.9Efi
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Quote:
Originally Posted by speedpin View Post
Yeah. I had to stop reading made my brain hurt. Guess we know who to PM if we are trying to wire up a relay.
And I'm dreading rewiring the rear lights on my 90...
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Land Rover 90, 3.9Efi Auto, Soft Top, NAS spec, Tangiers Orange.

Land Rover owners like it rough and dirty...
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  #109  
Old March 2nd, 2016, 09:13 PM
RBBailey
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RBBailey
1965 IIa
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I need a different job. One where I actually have time to learn how to do all this stuff.

Amazing work!

------ Follow up post added March 2nd, 2016 07:15 PM ------

What was the screen you used for the RPi at first? I'm looking for one for my Pi, but have not been satisfied with the reviews shown on the ones I can find on Amazon, and the local places never have screens like this in stock.
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1965 IIa SWB
1988 Saudi 110 (soon to be 300tdi)
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  #110  
Old March 2nd, 2016, 09:32 PM
Azarur
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LR 1984 110
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Happy to give you mine. Not using it anymore. It 7"
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  #111  
Old March 2nd, 2016, 10:32 PM
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RBBailey
1965 IIa
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I'll buy it from you. PM senting.
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1965 IIa SWB
1988 Saudi 110 (soon to be 300tdi)
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  #112  
Old March 7th, 2016, 09:49 AM
Azarur
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AZ
LR 1984 110
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Computer - Continued

After setting up the display then came the difficult task of actually wiring all the sensors in place. It turned out to be much harder than originally anticipated because most sensors output +5V or +12V but the Arduino DUE board can only take +3.3V input signals. That meant that we needed to create a circuit board that allowed us to "split" the voltage and drop all signals to +3.3 V. There were some exceptions where we could feed +3.3V to the sensor and get 3.3 back: All hall sensors (fuel meters, open door proximity sensors) and the thermistors. The gas thermocouple was also fine because it is a serial communication protocol, rather than an analog signal. However, everything else needed to be dropped (speedometer, tachometer, etc.). We used a piece of softare called "Fritzing" to design the sensor board.

Picture attached.
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  #113  
Old March 7th, 2016, 09:55 AM
Azarur
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LR 1984 110
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Finally, we re-designed the screen layout. The white background was way to bright at night, even with the auto-dimming. So we opted for a dark background. Here are the final pictures. The code is posted elsewhere. I won't show it integrated into the dashboard yet because I want to show the development of the dashboard separately...
I'm particularly proud of my "Open Door" screen. I think it's really cool. Please don't make fun of my "Press OK to Continue" screen with no "OK" button anywhere on the screen: the "OK" button is a physical button on the cubby.
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  #114  
Old March 7th, 2016, 02:25 PM
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Brian Morton
1991 Defender 110 "Blanca"
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Wow!

That interface is GREAT! What a super build thread. Very envious of your shop and electronic abilities. It's also wonderful that you have included your family in the build process.
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  #115  
Old March 7th, 2016, 03:12 PM
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Don Bunnell
'86 110 3dr ST
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That is slick! Very nice work.
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  #116  
Old March 7th, 2016, 03:45 PM
Azarur
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LR 1984 110
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Work day!

The kids were truly the inspiration to get the project going. In fact, as I've described in the past, it was in fact them who asked to get rid of the RRS to try to get a more sensible vehicle for the environment. Involving three very busy pre-teen boys in a buildout is not easy. It's hard to keep them interested and motivated. Luckily we found plenty of stuff for them to do - both at the shop, and at home. At the shop they participated on some body work, they helped assemble the engine, and helped a lot with the electrical work. At home they really helped with the design and coding of the interface.
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  #117  
Old March 7th, 2016, 03:53 PM
Azarur
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LR 1984 110
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Capital Sin

Capital Sin: "six things doth the LORD hate: yea, seven are an abomination unto him"

If you are a LR Defender purist, this is the time for you to take a break from reading this thread, because it is at this point that we departed from a "restoration." This is what ensures that I will never be able to sell this car, and I'm sure some of you will advocate that my vehicle gets added to "Rovers that Suck."

The reason we did what will be described in the following pages is simple: We wanted to. Some of you will appreciate what we did. Some of you will hate it. I appreciate both opinions equally, and I'm not particularly defensive. I recognize this is purely about taste.

So... you have been warned: Behold! Our Interior!!!

------ Follow up post added March 7th, 2016 04:58 PM ------

The first decision was driven by something really weird and visceral:I freaking hate the dashboard on the 110 and pre-Puma defenders. Hate it. Despise it. I think it epitomizes everything that was wrong with automotive design in the 80s. It's the opposite of functional. It does not provide even with the most basic information to drive a diesel, off-road, medium duty vehicle. How about a tachometer for crying out loud! How about oil pressure? How about voltage? How about a RADIO!!

So for a while we contemplated adapting the puma dashboard. But that's not us. It's too... I don't know. Nouveau Land Rover, I guess. So we figured: What the hell. Let's just build a new dashboard!!!
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  #118  
Old March 7th, 2016, 03:58 PM
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Will
1969 IIA
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I think I am mind blown............I am not sure I even understand what you are typing, but nonetheless.........keep typing.
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  #119  
Old March 7th, 2016, 04:16 PM
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Ed
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love the display! That's fantastic stuff. Also a great excuse to get the boys to code
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  #120  
Old March 7th, 2016, 04:44 PM
Azarur
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LR 1984 110
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So. We started designing our dashboard. What will it be made of? What features do we want? How do we want it to look?
These were all very basic questions, but nevertheless had complex answers.
For example: What material(s) should we use?
We wanted the dash to be finished in leather; the most similar leather we could find to the material of our seats. We also wanted to add some dark wood accents. That was the easy part. But how about the structural support of the dash? Should we use some sort of polymer? Fiber glass? Metal?
In the end, we decided to use the simplest, easiest to form material of them all. Wood. What??? Wood???
Yes. Wood.
It was in fact a process of elimination:
- Metal made no sense. Even though it's relatively easy to form and structurally strong, it would be crazy to try to wrap it in leather or give it any depth.
- Fiber glass would be attractive if we were planning to make more than one piece. In other words, make a mold and then cast as many dashes as you want. Same goes for polymers.

So in the end, we are left with wood. We obviously needed a wood that was treated so it would not swell and shrink too much with heat and humidity. We also needed the rigidity to mount all of our gadgets. So we used a special marine plywood and stainless steel, custom made brackets to attach and support the entire assembly.
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