The device is HID mouse controller with 4 buttons. There are: left mouse click, right mouse click, wheel up and wheel down as buttons. Connected to PC by Bluetooth. The controller is implemented as a ring on the hand. Designed for left and right handed execution. The device is based on the Seeed Studio XIAO nRF52840 microcontroller, it has its own battery power supply. The battery is of course charged when the USB cable is connected. Charging is indicated by a green LED. Magnetic cable can be used. Used together with Leap Motion and fingers, it eliminates the need for a mouse in the cockpit and allows hands/fingers to operate the buttons.

Github: https://github.com/rafgaj/Mouse-buttons-and-wheel/tree/main

Greyprints: https://www.thingiverse.com/thing:5886564

Wasp-os is a firmware for smart watches that are based on the nRF52 family of microcontrollers, and especially for hacker friendly watches such as the Pine64 PineTime. Wasp-os features full heart rate monitoring and step counting support together with multiple clock faces, a stopwatch, an alarm clock, a countdown timer, a calculator and lots of other games and utilities. All of this, and still with access to the MicroPython REPL for interactive tweaking, development and testing.

Wasp-os comes fully integrated with a robust bootloader based on the Adafruit NRF52 Bootloader. The bootloader has been extended to make it robust for development on form-factor devices without a reset button, power switch, SWD debugger or UART. This allows us to confidently develop on sealed devices relying on Bluetooth Low Energy for over-the-air updates.

Monocle is a pocket-sized open source AR/wearable computer interface in a single coin-sized device. Incorporates Bluetooth, a 720p camera, a capacitative touch sensor, an on-board microcontroller, an FPGA, and a micro-OLED heads-up display. Weight: 15g. Wireless charging (like Bluetooth earbuds, plug the case into a USB port, then set the unit in the case).

Cost: $349us

Runs Micropython as its firmware: https://github.com/brilliantlabsAR/monocle-micropython