Features Uses an LDR (Light Dependent Resistor) to detect darkness If it's dark, a white LED turns on Then checks distance using ultrasonic sensor (HC-SR04) If an object is closer than 20 cm, a buzzer ...

Raspberry Pi enthusiasts, developers, or makers wishing to connect multiple sensors to their Raspberry Pi mini PC may be interested in the Whitebox Labs T3 shield and Atlas EZO sensors, which when ...