L3G4200D Triple-Axis Gyro 4WD The relay is safely driven

The relay is safely driven by transistor BC547 hence your input device

VCC (power to APDS-9960 sensor)

Active Low Trigger Operation

Datasheets

L3G4200D Triple-Axis Gyro 4WD The relay is safely drivenA gyroscope is a type of sensor that can sense twisting and turning motions. Often paired with an accelerometer, you can use these to do 3D motion capture and inertial measurement (that is you can tell how an object is moving!) The L3G4200D is an is three axis angular rate sensor, with a digital I2C SPI serial interface standard output, which can be set to 250, 500, or 2000 degree per second scale for a large range of sensitivity. There's also built