A YouTuber has shared a gesture sensor that detects hand movements using electric field sensing. Unlike optical or infrared sensors, this method works through non-metallic surfaces, enhancing usability in enclosed environments. The sensor is based on Microchip’s MGC3130, a 3D gesture recognition controller that enables swipe gestures, circular motions, and depth tracking.
The MGC3130 utilizes GestIC® technology, allowing real-time x, y, and z position tracking with a detection range of up to 15 cm. It features auto frequency selection (44 kHz to 115 kHz), built-in noise filtering, and low-power operation, making it ideal for embedded applications. The design supports various electrode materials, including PCBs and conductive paint.
This sensor is built on a custom 4-layer PCB with TX and RX electrodes that detects hand movements by measuring variations in the electric field. It communicates via USB-to-I²C, enabling seamless integration with computers and embedded systems. Firmware capabilities include sensor initialization, configuration, and flashing via an external programmer.
This open-source project provides PCB design files, firmware, libraries, and example code, making it easy to modify and integrate. The sensor supports applications such as gesture-based controls, mid-air text input, and game interaction. With its customizable design and flexibility, it opens new possibilities for interactive and embedded systems.
