Table of Contents
What is HC-SR501 PIR motion sensor?
The PIR sensor stands for Passive Infrared sensor. It is a low cost sensor which can detect the presence of Human beings or animals. This HC-SR501 PIR sensor module has three output pins Vcc, Output and Ground as shown in the pin diagram above.
How much voltage does a PIR sensor use?
Power and Signal Pins The PIR sensor should be powered with at least 5V, but it can work with voltages as high as 12V. Fortunately, even if a PIR is powered higher than 5V, the alarm pin can still connect directly to an input pin because it is designed as an open-collector.
What’s PIR sensor HC-SR501 )? Its Structure & How it works?
It basically consists of two main parts: A Pyroelectric Sensor and A special lens called Fresnel lens which focuses the infrared signals onto the pyroelectric sensor. A Pyroelectric Sensor actually has two rectangular slots in it made of a material that allows the infrared radiation to pass.
Is PIR DC or AC?
PIR Sensor It is powered by the DC from the Tranformerless power supply.
How many watts does a PIR-sensor use?
1-3 W
Generally although a PIR-sensor-based lighting device will turn on when motion is detected, and will turn off when the motion disappears, the device still consumes 1-3 W power when the lamp is off.
How can I increase the range of my PIR sensor?
Changing Sensitivity and Delay time It is possible to make PIR more sensitive or Non-Sensitive Enough. The maximum sensitivity can be achieved up to 6 meters. Time Delay Adjust potentiometer is used to adjust the timetsel shown in above timing diagrams. Clockwise Movement makes PIR more Sensitive.
What is LUX setting on PIR?
The Lux dial indicates the light level in which the PIR will become operational during. A picture of a ‘moon’ indicates that the PIR can be activated during the dark. A picture of a moon with a sun means that the PIR can operate in any light level.
How do I adjust the sensitivity on my PIR Sensor?
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 current rate of PIR-sensor?
Predicted idle state current consumption is less than 60 micro-Amps. The output of PIR sensor is 3.3V TTL logic level making it compatible also with ESP8266, arduino Due (apart from arduino uno, nano etc) and other boards operating at 3.3V logic levels.
What is the output voltage of hc-sr501 PIR sensor module?
This HC-SR501 PIR sensor module has three output pins Vcc, Output and Ground as shown in the pin diagram above. Since the output pin is 3.3V TTL logic it can be used with any platforms like Arduino, Raspberry, PIC, ARM, 8051 etc.. Input voltage is +5V for typical applications.
What is a PIR sensor?
It is a low cost sensor which can detect the presence of Human beings or animals. This HC-SR501 PIR sensor module has three output pins Vcc, Output and Ground as shown in the pin diagram above. Since the output pin is 3.3V TTL logic it can be used with any platforms like Arduino, Raspberry, PIC, ARM, 8051 etc..
How does the hc-sr501 passive infrared sensor work?
The HC-SR501 passive infrared sensor (PIR) is affordable and straightforward electronic equipment. This sensor works by detecting any presence of either animals or human beings. Moreover, it’s popular since it can connect to any microcontroller, including the Arduino, Raspberry Pi, and PIC.
Which side of the Pir module should be mounted?
The LDR should be mounted from front side of the module. The PIR motion sensor module or PIR motion sensing technology works by sensing the change occurs in the infrared radiation or heat generated by a human or animal body in movement or motion.