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Smart Ring: Monitor Health Anytime, Powered by Sweat

This smart ring developed by the University of California, San Diego, can generate electricity from fingertip sweat while monitoring key biomarkers such as glucose, vitamin C, lactic acid, and levodopa (a medication for Parkinson’s disease).

The device is made from flexible, stretchable polymer materials, which fit snugly on the finger and are durable enough to withstand daily bending and stretching. Its built-in biofuel cell efficiently converts chemicals in sweat into electricity, which is then delivered through microfluidic channels to various sensors for analysis.

Additionally, the device can wirelessly transmit monitoring data to a specially designed smartphone or laptop application via low-power Bluetooth technology. This ring device allows for automatic health monitoring even during rest or sleep, greatly facilitating users’ real-time understanding of their health status.

Source: https://today.ucsd.edu/story/finger-wrap-uses-sweat-to-provide-health-monitoring-at-your-fingertipsliterally

ESP32 Playing AVI Video Files

This project demonstrates how to use the ESP32 development board and Arduino IDE to play AVI video files.

By using development devices like the Lilygo T-Deck, combined with SD card storage and I2S audio output, users can achieve synchronized video and audio playback on lower hardware configurations. The project supports older video and audio codec standards such as Cinepak and MJPEG for video encoding, as well as PCM and MP3 audio encoding, suitable for playing simple colored animation videos or JPEG sequence frame videos.

Additionally, the project includes guidance on converting videos to AVI format using ffmpeg, as well as detailed steps for software setup and program upload using the Arduino IDE. This is a project suitable for electronics and programming enthusiasts, allowing you to showcase a unique video playback device on your desktop.

Source: https://www.instructables.com/Play-AVI-With-ESP32/

Interactive Treadmill Enhancement Device

With the development of virtual reality technology, gaming experiences are increasingly leaning towards full-body movement, but high-end VR walking/running devices remain expensive and not widely available. To address this issue, Iacopo Guarneri developed a wearable motion capture enhancement device that users can use on treadmills, stationary bikes, or ellipticals to control actions in games. This device mainly includes an Arduino Nano and a six-axis MPU-6050 inertial measurement unit (IMU), which are housed in a custom 3D-printed shell that users can secure on their backs with straps. The device captures changes in user movement (such as speed and direction changes) and converts this data into action control signals in the game.

This method not only makes the gaming experience more immersive but also encourages more physical activity, allowing players to get effective physical exercise while having fun.

Source: https://blog.arduino.cc/2024/09/02/exercise-while-you-game-with-this-interactive-treadmill-add-on/

Hardware Calculator Made with Pure Assembly Language

This is a hardware calculator project based on the ATmega AVR MCU, developed entirely using pure assembly language.

The uniqueness of this calculator lies in its independence from any external libraries or ready-made solutions, designed entirely based on basic binary arithmetic and logic operations. It includes two custom libraries: one for floating-point operations and the other for interfacing with the LCD1602 display. Additionally, the project implements a simple finite state machine to parse key inputs, avoiding invalid number string inputs.

The entire project code and documentation are publicly available, and if anyone is interested, the developer will organize and publish a more detailed description of the development and internal workings.

Source: https://hackaday.io/project/197623-hardware-calculator-from-scratch

Mini ATtiny85 Game Console

This mini game console based on the ATtiny85 microcontroller provides players with a simple yet fun gaming experience through 3 buttons and 8 (or more) WS2812 LED lights as a display. The designer’s intention was to create a compact yet fully functional game console, challenging to maximize functionality within the limited pins, RAM, and Flash memory of the ATtiny85. To save memory, the project employs hardware-based debouncing techniques, avoiding the use of valuable memory for software debouncing programs.

The game console also supports increasing the number of display lights by extending LED strips, and theoretically, it can connect two game consoles for multiplayer gaming.

Source: https://hackaday.io/project/197743-attiny85-1d-game-console