Contents
How does HC SR501 work?
HC-SR501 is basically a motion detector sensor, which uses infrared waves for detection of an object. It is an automatic control device, also have large sensitivity and high reliability. It is used in auto-sensing control devices, where we need to perform motion detection.
What is the range of HC SR501?
HC-SR501 PIR Sensor has an adjustable delay before firing and adjustable sensitivity. Runs on 4.5-20V, Digital signal output is High 3.3 V / Low 0V. Sensing range is about 7 meters (100 degree cone).
How do you adjust HC SR501?
Adjusting the HC-SR501 You can adjust the sensing distance by rotating the sensitivity potentiometer CW or CCW (see picture above). Rotating the potentiometer clockwise increases the sensing distance to a maximum of 7 meters. Rotating it counterclockwise decreases the sensing distance to a minimum of 3 meters.
How does the PIR sensor in hc-sr501 work?
Here we will discuss the introduction of the HC-SR501 PIR Sensor module, sensor pin diagram/pinout, sensor hardware overview, How PIR Sensor Module Works, its Specifications, and applications. The PIR sensor is a specially designed electronic sensor that can able to measure or detect Infrared (IR) radiation.
What’s the difference between hc-sr501 and am312 sensors?
This tutorial focusses on the HC-SR501 sensor, but you can also use the provided code for similar sensors like the HC-SR505 or AM312. The main difference is that these cheaper sensors have a smaller detection range and don’t have a potentiometer to adjust the sensitivity and time delay.
What kind of lens does a PIR motion sensor use?
The white dome in front of the sensing element is a fresnel lens. This lens focuses the infrared radiation onto the sensor. The HC-SR501 PIR motion sensor is built around the BISS0001 Micro Power PIR Motion Detector IC. This IC is specifically developed to process the signal from PIR motion sensors.
Which is the Best Motion Detector for Arduino?
HC-SR501 PIR Motion Detector. For most of our Arduino projects that need to detect when a person has left or entered the area, or has approached, HC-SR501 PIR sensors are a great choice. They are low power and low cost, pretty rugged, have a wide lens range, easy to interface with and are insanely popular among hobbyists.