AM312 PIR Motion Detection Sensor

Specifications:

• Operating Voltage: 2.7V to 12V DC
• Static Power Consumption: < 0.1mA (Ideal for battery power)
• Delay Time: 2 Seconds (Fixed)
• Block Time: 2 Seconds (Fixed)
• Trigger Mode: Repeatable (Triggers as long as motion is detected)
• Detection Range: ≤ 100 degree cone angle
• Detection Distance: 3 to 5 meters
• Working Temperature: -20°C to +60°C
• Lens Size: 10mm Diameter
• PCB Dimensions: 10mm x 8mm (Extremely compact)

Applications:

• Smart Home Automation: Auto-lighting for closets, drawers, or under-cabinet spaces.
  
• Battery-Powered Security: Ultra-low power consumption makes it perfect for long-term remote monitoring.
  
• Interactive Art Displays: Trigger lights or sound when someone approaches a gallery piece.
  
• Industrial Sensing: Presence detection in compact machinery or control panels.

Virtual Technician & Wiring ⚠️ WARNING: Always double-check your polarity. Connecting the VCC to GND will permanently damage the internal  pyroelectric element.

 Wiring Guide:

• VCC (Pin 1): Connect to 3.3V - 12V DC.
• OUT (Pin 2): Connect to any Digital Input pin on your Arduino/ESP32.
• GND (Pin 3): Connect to the common ground of your power supply.

Package Includes: 1 x AM312 Mini PIR Motion Detection Sensor Module.

 Frequently Asked Questions (FAQ)

1. What is the detection range of the AM312?
   It can detect motion within 3 to 5 meters at a 100-degree angle.
   
2. Can I use the AM312 with an ESP32?
   Yes, the 3.3V logic output is directly compatible with ESP32 and ESP8266.
   
3. Does it work with 5V Arduino?
   Yes, it can be powered by 5V, and the 3.3V logic high is recognized as HIGH by Arduino.
   
4. Is the delay time adjustable?
   No, the delay time is fixed at approximately 2 seconds on this specific module.
   
5. How much current does it draw?
   It draws less than 0.1mA in standby, making it excellent for batteries.
   
6. Can it detect motion through glass?
   No, PIR sensors detect infrared radiation, which is blocked by most types of glass.
   
7. Is it suitable for outdoor use?
   It should be placed in a weatherproof enclosure as it is not waterproof.
   
8. What is the difference between AM312 and HC-SR501?
   The AM312 is much smaller, has lower power consumption, but fixed delay/sensitivity.
   
9. Does it require a warm-up time?
   Yes, like all PIR sensors, it needs about 10-30 seconds to calibrate to the environment after power-on.
   
10. Can I power it with a 3.7V LiPo battery?
    Absolutely, its input range starts at 2.7V.
    
11. What is "Block Time"?
    It is the period (2s) after a detection where the sensor ignores further motion to reset.
    
12. Is the trigger repeatable?
    Yes, it remains "High" if motion continues within the detection zone.
    
13. Why is my sensor triggering randomly?
    Check for heat sources or air currents (like fans or heaters) in the line of sight.
    
14. How do I mount the AM312?
    It can be mounted behind a 10mm hole in your enclosure for the lens to peek through.
    
15. What is the logic level of the output?
    The output logic level is 3.3V.
    
16. Can this sensor detect pets?
    Yes, any warm body moving will trigger the sensor.
    
17. Do I need a pull-up resistor on the output?
    No, the output is an active high signal.
    
18. Can it be used with Raspberry Pi?
    Yes, connect the OUT pin directly to a GPIO pin.
    
19. What is the size of the PCB?
    The PCB is approximately 10mm x 8mm.
    
20. Does sunlight affect its performance?
    Direct sunlight can cause false triggers due to high IR content.