HC-SR501 PIR Motion Sensor Module Green

Upgrade your next automation build with the popular HC-SR501 PIR module. It detects body motion by sensing changes in infrared radiation and delivers a clean 3.3 V logic pulse, perfect for MCUs, relays, or lighting drivers.

The board ships pre-aligned yet offers easy tuning via two onboard trimmers—one sets detection range (up to about 7 m) while the other adjusts output hold time (from a fraction of a second to several minutes). A jumper selects continuous or single-trigger mode.

• Operating voltage: 4.5 – 20 V DC
• Sensing angle: ≈120° cone
• Digital output level: high ≈3.3 V / low 0 V
• Low quiescent current: <65 µA (typ.)
• Compact 32 mm × 24 mm footprint
• Four mounting posts for secure installation

Simply connect power, hook the output to a microcontroller, relay, or direct logic input, and you have an instant way to detect the presence of people or animals.