PAJ7620U2 9-Gesture Recognition Sensor Module with I2C Interface

The PAJ7620U2 is an integrated gesture recognition sensor that brings contactless hand control to embedded projects without complex image processing on the host microcontroller. The module combines an infrared LED, an optical CMOS array, and a dedicated gesture recognition engine in a single compact package, allowing it to identify nine gestures: up, down, left, right, forward, backward, clockwise, counterclockwise, and wave. Detection data is accessed through an I2C interface at up to 400 kbit/s, and the sensor also provides built-in proximity detection for sensing objects that approach or leave its field of view. This 9 gesture recognition sensor operates from a 3.3V or 5V supply with a typical current of 2.82 mA, making it suitable for battery-powered human-machine interface devices. The recognition distance is specified as 5 cm to 15 cm, with a 60-degree diagonal viewing angle and a 240 Hz report rate, which is sufficient for responsive gesture control in consumer and robotic applications. Because the module includes an onboard infrared emitter and optical filter, it can work in low-light or dark environments and maintains reliable operation under ambient light levels below 100k lux. This I2C gesture sensor is commonly used in smart home control panels, touchless switches, robot interaction systems, and gesture-controlled toys. The module’s compact board measures approximately 16 mm by 20.18 mm and includes mounting holes for secure installation. With its combination of nine gesture outputs, proximity sensing, and low power draw, the PAJ7620U2 gesture sensor offers a practical solution for adding intuitive contactless control to Arduino, Raspberry Pi, and other microcontroller platforms.