HC-SR505 Mini Digital PIR Motion Sensor Module

The HC-SR505 is a compact, low-power passive infrared motion sensor designed for automatic electronic sensing. It delivers high sensitivity and reliable movement detection with a digital output, making it ideal for battery-operated builds. It is well suited for makers, students, and hobbyists creating smart lighting, automation, and security projects.

Compact and low-power operation

Featuring an ultra-small 10 x 23 mm circuit board and a quiescent current of under 60 uA, this module is optimised for power efficiency. Its wide DC 4.5 V to 20 V supply voltage range makes it exceptionally easy to deploy in portable and battery-powered devices.

Automatic infrared sensing

Based on passive infrared technology, the unit provides automatic control with a detection cone angle of under 100 degrees and a sensing range of up to 3 metres. When movement is detected, it outputs a 3.3 V high signal with a repeatable trigger mode and an approximate 8-second default delay.

Wide range of applications

This sensor is suited for body induction lamps, interactive toys, security products, and industrial automation equipment. Its self-contained automatic control allows for straightforward integration into diverse maker and educational projects.