Thes software can be found at my github https://github.com/awall9999/Arduino-Glass
Step 6
The Arduino Data Glasses


Project Logs
Feeling pissed off
I'm really feeling pissed off, when I see people using my designs and try to sell them as their idea.
This guy makes a nearly 100% copy of my Data Glass and only after I send him an email he added "inspired by Alain^s Projects". just inspired, really ???????
I think that's not the way open source should work. If you use the work of someone else, the minimum is to mention this person and set his website link in the description.
The only thing which calms me down, is that it is still my invention and other people will know it.

Lens Alternative
Hi, the lens is still the problem, because it is not easy to find.
I think, I found a good alternative. A small Fresnel lens. Easy to find, cheap and you can cut it with a pair of scissors.
Hopefully I will find the time to test it.
The focal length is about 110mm, with should be fine.

New Display 0.49 inch
The new displays just arrived. Will build a smaller version.
I think I will start a new project for this.


Things to do
Thinks to do:
- Finishing the Software, to auto connect to a Owon Multimeter
- Adding a battery indicator in the display. The BLE module has this feature.
- Building different reflectors with tint and mirror foils, to make the glasses work in a bright area,
- Reducing the weight and redesigning the enclosure.
- Testing with a smaller 0.49 inch display.
- Creating a technical Data sheet
The end is near
Finally, all fits together.Now a nice video of it, a full description and I'm done.


Modifying the charger circuit
I needed to change the LiPo batteries. I use now a smaller, 280mA, instead of the 330mA. For this I had to change the resistor in the charger circuit. It's 3k smd part. I soldered a normal resistor with the value of 5.6k in place to reduce the charging current to 200mA.

A small reflector modification
Until now, I heated the reflection screen and bent it to 45 degrees. To make the construction easier I printed a new holder. In the picture, you can see the difference

I looks like this will be the final design
I finally start handling the 123Design software and my 3d Printer.I was totally focused on my cardboard design enclosure, but at the end, I had to redesign the glasses due 3d print problems. Now you can adjust the reflection screen, to get the best view.In the next few days I'll test the electronic with the new LiPo, but I'm still waiting for the lenses.


B.T. Data Glasses in his new enclosure
I finally printed out the covers for the enclosure. The mirror and the lens are mounted with all the electronics. All fits in, and it works great. This one has a lens with a focal point of 100mm.



All in. The controller, bluetooth, display, charger and the LiPo Batterie.

First 3d printed enclosure
I just bought me a 3d Printer, and this is the first enclosure for my Dataglasses.

Quick Update on the software
I finaly can recieve all the width="500" height="281" src="//www.youtube.com/embed/GyuO3rePoHM" frameborder="0" allowfullscreen="">
New Body Design for 3D Print
This Weekend I designed a new body for my glasses and I finally ordered a 3d Printer.Now I have to adapt this Sketchup in 123D Design

Adding a Micro Usb port
I can now charge the Glasses over the charging board, or transferring >USB ports. I decided to add a Micro USB breakout board to have just one part, where I can program the Arduino, and in same time charge the Arduino Glass.

Multimeter connected to my Glasses
It took me a few days to analyse the Data coming from my Bluetooth Multimeter Owon B35T.
After I understood most of the values, I wrote a little program to transfer the Data directly to my Arduino Glass. Amazing, connecting to measuring points, and seeing the Data directly in front of where you are working.



Bluetooth Central
I've worked a little bit on the software. I configured the Hm11 as central and I let the module search for BT4.0 devices. After a few try's I made it work. I used a simple written Arduino program to send the serial, Bluetooth >USB and vice versa. Now I receive the id="38e5c4acfafa58219397df3531ce8f8b-a1a794bef71871a0fb98a944dca6a4a264bd4fb6" title="serialtest3.ino">serialtest3.ino)
void setup() {
Serial.begin(9600); // opens serial port, sets target="_blank">http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/image4.htmlThe best optics for this project are lenses with a focal length between 100mm and 120mm.The Maginifiging effect will be between 2.9x and 3.5x, witch gave the best results and the distance between the lens and the display will be something between 70mm and 80mm.

Bluetooth transmission test
Yesterday I wrote a little program to test the Data transmission to the Arduino glasses.On the mobile with min. Android 4.3 I use now this terminal software: HM BLE Terminal.I made this quick video to demonstrate. Link to the video
Bluetooth connected
Ok, I found the time to connect the Bluetooth 4.0 module. Looks good, and the current for the whole thing is about 24mA. Will take more when I start to transmitt >schematic of my prototype. The only thing that is not implemented yet is the Bluetooth module (maybe this weekend)

Prototype IV
Here is the build of my Prototype 4. This one has a lens with a FL of 120mm and a LiPo Accu.
It's build again out of cardboard. The bluetooth modul will be added soon






Lipo 3.7V
My lipo finally arrived.

And charging ...

I found the "easy to find Lens"
The main challenge was to build it with easy to find parts, but the lens is a problem. I had a pair of perfect lenses (the lens on the right. A plan convex lens with a size of 33mm and a FL of 100mm), but these are difficult to find. In China I had the possibility to buy them by 100 pieces min. order.So I took the weekend for a few optical tests and the winner is.... the lens of my magnifying head glasses. There are 3 lenses in the set, but the one we need is the big one with a magnifying of 3,5.
The frame of these head magnifier will be used to hold the >of the whole thing is about 10$.
It has a focal length of 12cm so that the way from the screen to the lens will be 8,1 cm, with a magnifying factor of 3,. On picture 2 you can see how I found the focal length.


Lens Calculation
I made the >trial an error challenge. So I took a google crash course in optics.
First of all I had to understand the difference between a real and a virtual image with lenses. Then a very important thing is, that a human eye can only focus an object with a distance of min 25cm.
And all what I needed was this formula (1/f) = (1/s2) + (1/s1) where f is focal length of the lens s1 is object distance to the lens and s2 is the distance of the virtual image.
I will build now Version III based on this calculation.

Lens Update
Today the result of my lenses tests. All the easy to find lenses does not give the result I want.The only one which works is the one from the video, the lens from a cheap Chinese 3d viewer.Problem is, that I have no technical >choice, so I will try a few other lensesHere now the B2 version with lens and screen mounted. Works but I'm still not satisfied


Version B2 with a focal point of 45mm
Version II of my Arduino Glasses. Again build out of cardboard. Goes much faster than a 3d Printer (if I had one)I added a sort of clip to attach it to the glasses. Hopefully I will add the lens and the screen this evening.


New Design
Now it's sure, the Google cardboard lens has a shorter focal point. So I had to redesign my prototype and it seems to work. Need to cut the lens.



Lens differences
It seems that the lens I used is not the same as the lenses in a google cardboard.
This is not what I wanted, I want to build this item that everybody can rebuild it.
I used for my first prototype, witch works, a lens from these cheap 3d glasses.

And this was the testsetup.

And now I has to redo the tests with original google cardboard lenses.
Testing an other optic version
There is still a little ghost picture in the screen, so that I try another optic system. Looks better for the moment, but I have to change the lens -> screen setup.


Stunning Results
I searched and found a lens with f=45mm, and I trimmed it to the correct size.


I could not resist to test it instantly, and the result is stunning. I tried to photograph it, so that you can imagine the result.




First real test
Yes, it works. It is still the wrong lens with a focus point of 68. The correct one should arrive end of this week.But it works. the Plexiglas in front of my eye is nearly invisible, but I can see and read the display.It´s even working better than I thought. Now I´m realy motivated to finish this project
To capture the working device on photo, will take me much more efforts :)



Oled Display Test
Yes, the display works. I installed the display demo on it. Next step, hopefully this evening, is the focus test.

The parts are there
My electronic components are there. Just the Lipo is still missing

Design Test




Construction with 0.96 Oled Display
First test with a cardboard housing and a 0.96 inch oled display.
Memo to myself: I NEED A F****ING 3D Printer




Second Test Setup
This time with a Mirror
Looks good, but I used a plastic mirror and I got a ghost image due the dual reflection.
Working on a better solution...



First Test Setup
In the first test setup, I used an oled display an adruino nano and a lens from my magnifying glass headband. Focus point is in about 10cm and displayed on a cd case.


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