Instructions | Arduino Glasses a HMD for Multimeter

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.
http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/image4.html
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.
4

Step 4

The enclosure.
for the first tests I used an enclosure made with cardboard. This was a cheap solution and worked very well

For the final version, I used my 3D printer. The style file has been created in 123design. I need to make a few modifications to the design, but it's not bad for the first try.
5

Step 5

Connecting the Owon B35T Multimeter with the data glasses
This multimeter has an intern bluetooth 4.0 communication, so you can connect it to your phone or tablet
I had to reverse engineer the serial protocol.
Config of the BT module.
I used a simple Arduino program to send and receive Data to and from the module.
First you have to set the module to Cental.
AT+ROLE1 moule = central
AT+RESET reset
AT+SHOW1 show Bluetooth name in response
AT+IMME0 connect automatically
AT+FILT0 scan for devices
AT+DISC? Show devices
To connect to the Owon B35T type AT+CONE0(Mac adress of the Multimeter)
These softwares can be found at my github https://github.com/awall9999/Arduino-Glass
6

Step 6

The Arduino Data Glasses

Discussions

Carlos Bardelotti wrote 08/28/2018 at 01:16

Parabens pelo projeto Arduino Glass, sou do Brasil.... Sou estudante de analise e desenvolvimento de sistemas, gostaria de usar seu projeto para tentar fazer implementacao, tentar desenvolver um sistema que interage com o arduino glass com celular atraves do

Bluetooh , conseguindo essa proeza disponibilizarei o codigo para voce, colocari um link para que todos veem seu projeto Arduino Glass. Um abraco.

Congratulations on the Arduino Glass project, I'm from Brazil .... I'm a student of analysis and development of systems, I would like to use your project to try to implement, try to develop a system that interacts with arduino glass with cell phone throughBluetooh, achieving this feat will make available the code for you, will place a link so that everyone sees your project Arduino Glass. A hug.

Are you sure? yes | no

Gangadhar Vaidy wrote 12/08/2017 at 20:00

Hay,

I am thinking about installing a ready made eye piece in the display box. That can replicate a monitor or tablet screen. Some what similar to OLED viewfinder in new mirror-less cameras.

Do you think that will work. I know I might have to change the lens, but the mirror and reflector will work or not.

Are you sure? yes | no

AT+ROLE1	moule = central
AT+RESET	reset
AT+SHOW1	show Bluetooth name in response
AT+IMME0	connect automatically
AT+FILT0	scan for devices
AT+DISC?	Show devices

Arduino Glasses a HMD for Multimeter

How it works

The Lens

The electronic

The enclosure.

Connecting the Owon B35T Multimeter with the data glasses

Config of the BT module.

The Arduino Data Glasses

Discussions

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