Arduino Uno R3; 5mm LDR; 10K ¼W Resistor; 1K ¼W Resistor; 5mm Red LED ; 5V Piezo-Buzzer ; ... (PIR) Sensor. The PIR Sensor detects the motion of a human body by the change in surrounding ambient ...

Interfacing a Bare PIR Sensor with Arduino – Can It Be Done. Posted: June 23, 2025 | Last updated: June 23, 2025. Hi, I'm Bill. I'm a software developer with a passion for making and electronics.