Scope of the project
The final project that I intend to build is a head up display for helmet. There are some tutorials to DIY google glasses inplemented, but I wanted to go for a intuitive design for it. The form factor of these DIY google glasses is build in such a way that it takes up some of the peripheral vision of the wearer which to my judgement would affect the wearer's riding capability. My intension of this project is to give more details to the rider without reducing the data from peripheral vision. I am expecting a lot of trial and error to build on the form factor.
What will it do?
The head up display will show direction based navigation using a mobile app. It indicates the speed of the rider. And some more data if there is real estate on the screen.
Who has done what beforehand?
Google glass was the first most popular commercial consumer augmented reality headset that got released. But due to its high cost and accessibility, it stayed back as a developer edition. There are more companies that are building augmented head sets; some companies are specifically building HUD for helmets, but these products are still costly and would actually need the rider to shift their gaze to the device to get data.
What materials and components will be required?
My intend is to come up with a low cost and intuitive HUD design. The major materials in need is an
| 0.49 inch OLED display |
| Bluetooth module |
| Semi Reflective Mirror |
| Rotary Encoder |
| Lens |
| Atmega328p |
| Resistor 10k ohm |
| Resistor 499 ohm |
| Capacitor 1uF |
| Capacitor 100pF |
| Capacitor 10uF |
| Capacitor .1uF |
| Resonator |
| AVRISP |
| LED |
| Switch |
| Voltage Regulator |
Where will they come from?
These are readility available on online markets. I have acquired most of the components with ease.
I'm planing to get the rotary encoder from old computer mouse; for semi reflective mirror, I'm trying to get a semi reflective silver sticker; for lens, from jewellers magnifiers. The rest are available from the lab itself.
How much will it cost?
| 0.49 inch OLED display module | 480 Rs / ~7$ |
| Bluetooth Module | 400 Rs / ~6$ |
| Lens | 300 Rs / ~5$ |
| Rotary Encoder | 150 Rs / ~2$ |
| Semi Reflective sticker | 65 Rs / ~1$ |
The rest of the materials are available from the FabLab and so in total, it would cost somewhere around 25$
What parts and systems will be made?
The prism which happens to the most important part of my design to build an intuitive HUD. I read through research papers to find out there are many designs out there for augmented reality. I am currently working on a freeform prism to display the data. Its more of a trial and error method.
The PCB design and electronic boards need to be milled.
The optics case need to be 3D printed.
Need to laser cut the acrylic mirror and for the building mould negative of the freeform prism.
Freeform prism need to be created by moulding and casting and need to be tested to see if it work for my project.
The case for the electronics are to be 3D printed as well.
Copper Vinyl cutting a circuit for a breaklight
What processes will be used?
Laser Cutting, 3D printing, Electronic Design and Production, PCB milling and assembly, Programming and application interface.
And Casting and moulding, I'm currently working on the prism, which I'm making using plastic casting. Instead of milling wax for the mold, I made one using acrylic which I cut using laser. I tried out to see if I can create waveguide holographic display, but it did not work out as I expected.
If I get time, I would do a copper vinyl cutting of a circuit board for break light
What tasks need to be completed?
Works related to optics need to completed first. 3D designing of the outer body comes next. I was able to get OLED working in my application interface week which will be helpful for this project.
What questions need to be answered?
What set of optics would work best for the head up display?
Is the semi reflective mirror available or should I procure a semi reflective sticker?
Does my 3D designs for the optics case affect the peripheral vision?
Is the display bright enough to be useful during daytime.
Is the display data screens toggleable using the rotary encoder
What is the schedule?
Since the trial run of casting of the prism is almost done, it should give me an idea of the optics I could work on. I would also complete display data OLED and integrating it with rotary encoder this week.
My schedule for next week, is to integrate everything into one form factor and to see if it works okay. After that I would work on the app and OLED display data.
Third week I would 3D print the outer body. The designs would be finalised the week before.
How will it be evaluated
I consider the project successfully implemented if I can get the optics work, and the display data is visible enough without loosing peripheral vision. Its a bonus if I could send image data via bluetooth during the time of project development.