HCSR501 PIR Motion Sensor Detector module is used to detect motion generally, the motion of humans within the range of the sensor. It has three pins i.e., Vcc, Dout (High/Low output) and Ground. This module works on 5V DC hence Vcc is supplied with 5V DC. Dout is an output pin. It gives 0V when idle i.e., no motion is detected. 3.3V is retrieved as output from Dout when it detects motion within the range. The range of the HCSR501 PIR motion sensor is 120° and 7 meters. This module can distinguish between human motion and object motion. Operating temperature of the module ranges from -20°C to 80°C.

There are two potentiometers in the module to control the sensitivity of the sensor. The detection distance can be increased or decreased using a potentiometer while the delay time can be increased or decreased using the other potentiometer. 

This module has two working modes. Repeatable mode(H) and Non-Repeatable mode(L). In Repeatable mode, the Dout will supply a high signal for a particular time once it detects a motion in its range and then goes low. But in Non-Repeatable mode Dout goes high once it detects any motion and remains high for the time the object of which motion was detected remains in the range of the sensor. This module is usually used for automatic lights, security systems and in many other machines for automation. This PIR sensor is often referred to as “PIR”, “Pyroelectric”, “Passive Infrared” and “IR Motion” sensor.

Features :-

• Compact size
• Infrared sensor: dual-element, low noise, high sensitivity
• Blockade time: 2.5s (Default)
• Infrared Sensor with Control Circuit Board
• The Sensitivity and Holding Time Can be Adjusted
• Sensitive Setting: Turn to Right, Distance Increases (About 7M); Turn to Left, Distance Reduce (About 3M)
• Time Setting: Turn to Right, Time Increases (About 200S); Turn to Left, Time Reduce (About 5S).

Specifications:-

• Model :- PIR HC-SR501
  
• Color :- White + Green OR  White + Blue
  
• Operating Voltage Range :- DC4.5-20V
  
• Average Current Consumption (mA) :- <60uA
  
• Detection Range :- <140°
  
• Distance Measuring Range :- 3 to 7m (can be adjusted)
  
• Output Type :- (High/ Low-level Signal) 3.3V TTL output
  
• Work temperature :- -20 ~ +80°C
  
• Dimensions (mm) LxWxH :- 32 x 24 x 18
  
• Weight (gm) :- 10

(Note: Product Image are shown for illustrative purposes only and may different from the actual product)