Arduino Glasses a HMD for Multimeter

Building an HMD with no special parts, to make work easier and safer

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Trying to build a cheap Arduino Data Glasses for everybody.
It's working, and now it can even help to avoid accidents. From the first idea to the working prototype, it took 4 Month

The challenge was, that It should be constructed out of common materials that can be found easily.
The project is more about how to build the optical system for this HMD
I have a few ideas and one of them is to connect it to a Multimeter over Bluetooth to get the Data right in front of my eyes.
One thing is clear, you can not just place a screen in front of your eyes, because it will not be possible for them to focus it.

In the logs you can see from the first tests to what I have now.
The whole project runs under Open Source License.

And please, if you use my design, do not forget to mention that it is based on my idea and add a link to my homepage
Thank y

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

Link to the video


Standard Tesselated Geometry - 150.67 kB - 09/24/2016 at 21:03



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Standard Tesselated Geometry - 36.61 kB - 09/24/2016 at 21:03


  • 1 × arduino pro micro
  • 1 × Bluetooth V4.0 HM-11 BLE Module
  • 1 × 280mA Lipo Akku
  • 1 × 50 - 500mA LiPo Charger Circuit
  • 1 × 30mm acrylic plano convex lens with a FL of 100mm

View all 9 components

  • Feeling pissed off

    Alain Mauer02/26/2018 at 21:08 15 comments

    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

    Alain Mauer12/18/2016 at 11:27 2 comments

    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

    Alain Mauer10/18/2016 at 19:56 5 comments

    The new displays just arrived. Will build a smaller version.

    I think I will start a new project for this.

  • Things to do

    Alain Mauer10/10/2016 at 07:24 0 comments

    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

    Alain Mauer09/19/2016 at 16:07 0 comments

    Finally, all fits together.
    Now a nice video of it, a full description and I'm done.

  • Modifying the charger circuit

    Alain Mauer09/17/2016 at 19:28 0 comments

    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

    Alain Mauer09/16/2016 at 07:43 0 comments

    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

    Alain Mauer09/15/2016 at 08:33 0 comments

    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

    Alain Mauer09/02/2016 at 16:08 2 comments

    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

    Alain Mauer08/31/2016 at 07:25 0 comments

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

View all 37 project logs

  • 1
    Step 1

    How it works

  • 2
    Step 2

    The Lens

    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.

  • 3
    Step 3

    The electronic

    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.

View all 6 instructions

Enjoy this project?



Anthony Lee wrote 08/31/2023 at 15:19 point

Can the MC board be switched with a seeduino since it has both in a smaller form factor?

  Are you sure? yes | no

yunus emre wrote 01/20/2023 at 07:13 point

Hi Sir I want to do this project if you want to help me send me code to my gmail please.

  Are you sure? yes | no wrote 10/06/2022 at 22:18 point

Hi Sir I am a student from turkiye and i want to do this project if you want to help me send me code to my gmail please , Thank You!!

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clock work wrote 09/07/2022 at 14:52 point

Hey, I wanted to inform you I built something like that, well, I did more of a POC.

I used a microcontroller like this:

because sending over LORA is nice and the MC already has a display soldered directly onto the board.

So far nothing special. Now, here is the real information:

You must have noticed problems with the lens and the mirror. You have to make sure that the screen is in the dark, the lens is in the correct angle etc.

This is a real pain, so I thought I'd share how I overcame this:

I would use the lens from a holographic sight from a softair gun. These holo visors are "coated" with a thin layer of iridium (i think it's iridium, can't recall, maybe something else), so they reflect a simple contrast-image, like a text ( or a holo - crosshair ) perfectly while in complete light. Perfect readable, the distance to the screen can be really short so the screen can be attached directly left of the glass, no mirror and stuff needed.

I hope somebody will read this and take the idea a step further: directly coating the eyepieces of the glasses ( the "glass" of the "glasses" kinda LOL )

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James Newton wrote 09/08/2022 at 19:50 point

Any idea where one finds the lens from a holographic sight? Or do you buy the sight? 

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emre18812015 wrote 06/01/2022 at 19:31 point

Hi Mr EMRE, any chance you could email me the code to this project? I'm really keen to build this project myself, as I'm new to working with Arduino projects

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ag8345969 wrote 05/07/2022 at 09:00 point

Hello sir, could you send a circuit diagram and the code for the glasses,please 

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ag8345969 wrote 05/07/2022 at 09:04 point 

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yoyookhaled123 wrote 04/21/2022 at 09:47 point

This is a great work really i have been inspired by this invention and i want to make one for me can you please send me the code

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Zohaib wrote 03/27/2022 at 14:33 point

Hi Sir I am a student from Somalia and i want to do this project if you want to help me send me code for my gmail please , Thank You!!

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sdf564841553 wrote 03/02/2022 at 13:05 point

Hi I am a student in zju. I really love this project and  want to make one like this. Could you send me the code for the glasses? thank you! 

My mail is

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Christopher wrote 10/30/2021 at 04:47 point

Hello, I am a college student in South Texas. I really love your glasses and was wondering if you could share you're code with me. I would like to make them for a school project. Can you please send it to me at this email. Thank you for inspiring me.

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Deadspree wrote 10/11/2021 at 15:30 point

Hi I want to use the light emitting principle of the glass but I wont be using bluetooth but other censors. Am I allowed to do 

, pls reply me soon. my mail is 

  Are you sure? yes | no wrote 05/22/2021 at 10:12 point

Hi I am a student from Italia and i want to do this project if you want to help me send me code for my email plis

  Are you sure? yes | no

cccsue wrote 05/11/2021 at 10:05 point

Hi, thanks for the inspiration. I want to study more about your project. Could you send me the code for the glasses? thank you!

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Caleb Ellis wrote 12/27/2020 at 13:07 point

Hi, I see this question a lot below. Could you send me the code for the glasses? Thank you! 

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moba0240 wrote 10/21/2020 at 10:25 point

Hi sir, I just want to say that i have taken an interest on this great project of yours, is it possible to request from you for a copy of the code used on this? here is my account

thank you!!

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Mike Hibbett wrote 10/02/2020 at 10:43 point

Love it, thanks for the inspiration. I'm building it using a NRF52 module (MDBT42) with a custom PCB to reduce the weight / allow a bigger battery. Can't wait for the OLED & lens to arrive! enclosure printed, fits nicely

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MaiChiemAn wrote 09/26/2020 at 04:34 point

I love this project. I can bother you but I can get the code from you via, Thanks so much

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buddikatdk wrote 09/18/2020 at 20:07 point

i really  like about this project,can i get the code to make one like this.this will help me in future to do some electrical can send me the code at my gmail:  thank you 

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surajsinghkaintura90 wrote 09/05/2020 at 17:51 point

Sir, I'm Suraj form India. I'm an electrical engineering student. Sir I really like your project data glass for multimeter... And I want to build it with myself as for some experience and fun... But I'm not able to write code with myself... 

So could you please send me the code in my Gmail - 

Will be very grateful to you! 

  Are you sure? yes | no wrote 08/25/2020 at 13:37 point

Hi Alain

I'm doing this interesting project and i'm interfacing an arduino board with Bluetooth 4.0. I was able to connect my Owon OW18B to the arduino board but it return me only a message TX!!~~

Could you help me to solve this issue?

Does your code include the correct commands to interface the Multimiter wit arduino and enable the communication?

my email is

Thank you


  Are you sure? yes | no

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