Context

Varifocal

We need to make a board to deliver power to all of the various breakout boards, as well as the voice coil motors. As a bonus, this board could have the MCU/IMU for tracking integrated, as well as the PWM output for the voice coils.

System Diagram (wip)

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Connections

Context:

The headset should be as standalone as possible. Current plans are all electronics are powered from within the headset. Only cable to the computer should be the display cable.

We are currently using the Northstar displays, display driver board, and SLAM functionality, which serves as it’s own separate system. It receives power from the same USB-C cable it receives data. This is currently completely separate from the Motherboard.

Minimum Feature Set:

Power:

IN:

Receives power from power bank. USB-PD over USB-C preferred.

OUT:

4x 2-pin JST USB 5V headers for the ETVR XIAOs and IR LEDs (power only)

14.7V supply to the VCM (Voice Coil Motor) Driver

Unconfirmed: 2-4x USB-C (power only) for future expansion

Unconfirmed: Method to power some sort of MCU like a Raspberry Pi