The HW-416-B PIR sensor has a simple 3-pin interface:
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| Pin | Name | Description | |-----|--------|------------------------------------| | 1 | VCC | 4.5V – 20V DC power input | | 2 | GND | Ground | | 3 | OUT | Digital output (HIGH = motion) | The HW-416-B PIR sensor has a simple 3-pin
try: while True: if GPIO.input(PIR_PIN): print("Motion detected!") time.sleep(1) except KeyboardInterrupt: print("Quit") GPIO.cleanup() search results show several potentially useful pages
If the output remains permanently LOW:
Output stays high as long as motion is detected. 3. Pinout Configuration
The HW-416-B lived in many projects after that: a cupboard light that only came on when hands reached in, a hallway guardian that lit the way for sleepy feet, a garden alarm that stayed quiet until a fox crossed. Each time, the datasheet—a modest document of voltages, currents, and angles—was the seed from which a practical solution sprouted.