How do I connect PIR motion detector sensor module HC-SR501?
Connecting PIR sensors to a microcontroller is really simple. The PIR acts as a digital output so all you need to do is listen for the output pin to flip HIGH (Motion Detected) or LOW (Not Detected). Power the PIR with 5V and connect ground to ground. Then connect the output to a digital pin #2.
What is HC-SR501?
HC-SR501 PIR Sensor detects motion by measuring changes in the infrared (heat) levels emitted by surrounding objects. When motion is detected the PIR sensor outputs a high signal on its output pin. HC-SR501 PIR Sensor has an adjustable delay before firing and adjustable sensitivity.
How do I adjust the sensitivity on my 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 do I adjust the sensitivity on my PIR Sensor?
Changing sensitivity The Adafruit PIR has a trimpot on the back for adjusting sensitivity. You can adjust this if your PIR is too sensitive or not sensitive enough – clockwise makes it more sensitive.
What is the difference between detection and PIR motion?
2. PIR-based Motion Detection: In this case motion is detected by means of a PIR sensor, a passive infrared sensor. This sensor detects emitted infrared energy from objects (humans and animals, but also cars) in the form of heat….Cart Summary.
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Should PIR sensitivity be high or low?
A decreased sensitivity is good for a short range, say half of the maximum range or up to 10 feet (3 meters). Which in turn could miss movement at a longer range. Objects further away may need more motion to be detected.
How do I reduce the distance on my PIR sensor?
cover the PIR sensor with transparent plastic with different color (green ,red, yellow, orange, white), it can reduce the range of my PIR sensor, but also make it very un-reliable. I have also tried cover the sensor with combination of different color, and/or multiple layers, same result.