HCSR501 PIR Motion Sensor
The PIR Motion Sensor Detector Module HC-SR501 allows you to sense motion. It is almost always used to detect the motion of a human body within the sensor’s range. It is often referred to using “PIR”, “Pyroelectric”, “Passive Infrared” and “IR Motion” sensors.
The module has an onboard pyroelectric sensor, conditioning circuitry, and a dome-shaped Fresnel lens.
It has a delay time adjustment Potentiometer and sensitivity adjustment Potentiometer. Repeat Trigger Selection Jumper is also available. Compatible with Arduino, Rasberry Pi, AVR, PIC, 8051, etc.
- Automatically sensing light for Floor, bathroom, basement, porch, warehouse, Garage, etc
- 1 x HCSR501 PIR Motion Sensor
PIR Motion Sensor Specifications
|Operating Voltage||4.5 ~ 20V|
|Average Current Consumption (mA)||0.06|
|Distance Measuring Range (cm)||300 ~ 700|
|Dimensions||32 x 24 x 18 mm|
Frequently Asked Questions
1. What is an HCSR501 Sensor?
- The HCSR501 PIR sensor is a passive sensor (which means it hardly uses any energy to work). It detects infrared radiation from a passing heat source. You can use this to make a motion detection device, a light switch, or you could string many together and you could make an instrument that you won’t need to touch.
2. What is the Range of PIR Sensor?
- Indoor passive infrared: Detection distances range from 25 cm to 20 m.
Indoor curtain type: The detection distance ranges from 25 cm to 20 m.
Outdoor passive infrared: The detection distance ranges from 10 meters to 150 meters.
Outdoor passive infrared curtain detector: distance from 10 meters to 150 meters
3. What is the difference between PIR and IR Sensor?
- The IR sensors detect whether the light from the transmitter is emitted by an object or a person. Whereas, the PIR sensors detect changes in the levels of energy around the area.
If the PIR sensor is installed towards the changing environment, it may let off a false alarm due to the change in the way the air flows; however, IR sensors must be installed facing the motion.
IR sensors are usually only installed on the outside of properties, whereas PIR sensors are usually installed inside.
PIR sensors don't actually emit the infrared; objects give the sensor infrared rays. This differs from IR sensors, which do actually infrared.