Building an HMD with no special parts, to make work easier and safer
The optical design will be the most difficult part, but I think I found a solution for this.
Follow the project logs to see the updates. The costs of the prototype amounted to 70Euros.
Video of the working device
Link to the video and Link to the video in German
One of the Prototypes
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.
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.
The new displays just arrived. Will build a smaller version.
I think I will start a new project for this.
Thinks to do:
Finally, all fits together.
Now a nice video of it, a full description and I'm done.
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.
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 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.
 |  |
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.
I just bought me a 3d Printer, and this is the first enclosure for my Dataglasses.
The lens was a tricky thing. I had not really an Idea about optics. So I googled and googeld, and I learned a lot about real images, virtual images focal points, and magnification. The best working lens is an Acrylic Plano convex lens with a focal point of 100mm. If you place the screen at a distance of 73mm from the lens away, you will get a virtual image at a distance between 27-30cm. The magnification factor is x3
That's perfect, because another important thing is, that your eyes can only start focusing things at +-25 cm
I found this website to calculate the object distance.
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/image4.html
Here are all the parts for the data glasses
I just used a smaller battery.
To use the 280mA battery, I had to change the 3k resistor against a 5.6k resistor on the original board. The charging current is now reduced to +- 200mA.
Hello, I liked your project, you would be so kind to provide me with the arduino code, I would like to try to make some for me. Please, my email is hectorj2029@hotmail.com
Hello, I would like to use your idea in my project, would it be possible for you to provide the source code, which makes the whole operation work? Do you have an article? my e-mail : omodei@alunos.utfpr.edu.br
Hi Alain I want the code of Arduino Pro because I am Making this Arduino Smart glass. So, please send me on my email
Hi Alain,
Great Work on the HMD. Really a big fan of it.
I can suggest to up the ante of this design by using Intel TinyTILE (https://gobot.io/documentation/platforms/curie/) for multiple reasons. Although it is discontinued by Intel :-(
Also I found a this (https://www.seeedstudio.com/Widora-AIR-Based-ESP32-Development-Board-p-2944.html) to be useful as well
And the ultimate one to be this (http://inversepath.com/usbarmory.html#ordering)
However I am fully aware of the power consumption of these hardwares but these are pretty serious ones, considering the future of industrial IoT sector.
Keep up the work and I sincerely wish you all the best
Hi, Great project, I'd like to make one, all I need is the time :-)
hi Alain, fantastic idea, maybe is possible to adapt to motorcycle helmet with direction information... your project open many possibilities...
thank you!!!! \m/
Hi Fabiano... have you adapted this for a motorcycle helmet yet? I was thinking about that myself. Would have to use something like a 25mm Dia. x 30mm FL Plano-Convex Lens or something similar to shorten it and maybe tilt the glass along its long edge to refract from below. What do you think? regards Stuart
hi alain, i am a engineering student. i have some question about this project. where i can buy the lens? please answer my question, i am very need this project. thank you
I want to know how to connect all the wires . thank you
A fantastic idea, I look forward to watching your idea evolve. Thank you.
Excuse me what commands you used in the Arduino, to test the messages that you send with the application and that were transmitted in the Oled display. Because I tried to do the same test but the Oled don´t recognize any word that the Bluetooth transmitted.
Saw your post.... there is always one. Many thanks for your inspiration and your creativity.
Hi, first of all, this is a great project! I have a question though: Aren't double convex lenses also an option instead of plano lenses? They are easier to find due to all the DIY VR goggles and potentially cheaper too.
Can text not be mirrored and displayed on the lcd rather than use mirrors to do same?
I was wondering the same, just place the display against the glass
Alain, i am a engineering student ,i am excited to work on your project ,but have you published any paper on this project...if you have then plzz mail me your published paper on (uagaleharshal@gmail.com) thanks in advanced
Hej Alain,
Great project! And thanks for the detailed explanations and images.
I wonder how you connected the USB breakout board, in order to still be able to program the pro micro. Ie. did you connect the D- D+ to pins on the board?
Thanks,
Thomas
Alain Mauer
matteo_m
Daniel Rojas
Hello, i found your project very interesting, can you send me the arduino code? thank.
email: domi.comm@gmail.com