Generating the real-time images required for augmented reality (AR) goggles usually requires considerable processing power, so that Raspberry Pi-based DIY work is often difficult to keep up. But what if your AR desires don’t need fancy high-resolution graphics?If the text and occasional icons are enough to complete the work, then These low-fidelity AR goggles come from [bobricius] May be the ideal solution.
Like the self-made AR device we saw before, this device is above all an affordable headset designed to project the display of a smartphone onto a pair of curved optical combiners.But not to put the phone in the earphones [bobricius] Using a customized PCB, it can accommodate a pair of ST7789 1.3-inch 240 x 240 IPS displays. Connected via SPI and supported by almost any microcontroller you want to use, it only takes a few lines of code to transfer some text data in your field of vision.
[bobricius] In fact, several different versions of PCB have been combined for this project. One person uses his customized “ArmaBrain” module based on ATSAMD21E18, which packs the MCU and a series of common components on a 28 mm square board, which can be easily put into other projects. If you prefer to introduce your own solution, then it should be good to fix the two displays in place and route the SPI line to the second version of the board with convenient connectors.
We have seen augmented reality displays using microcontrollers like ESP32 before, but these are essentially remote displays for more powerful systems. We like this simplified approach, because in many applications, only a few lines of text or some low-resolution images are enough to complete the task at hand. In addition, the commercial headset on which the project is based certainly looks better than some other donated goggles that we have considered modifying in the past.