What is HC-SR501 PIR sensor?
What is HC-SR501 PIR 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 does HC-SR501 sensor work?
Working of HC-SR501 HC-SR 501 sensor is designed to detect such level of infrared radiation. It basically consists of two main parts: A Pyroelectric Sensor. A special lens called Fresnel lens which focuses the infrared signals onto the pyroelectric sensor.
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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What is the range of HC-SR501?
about 7 meters
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).
Can you fit a PIR sensor to an existing light?
Simply unscrew your light bulb, plug this in, and then screw your light bulb back in. Voila! A simple, effective, motion sensor for your existing outdoor lights. Many PIR sockets are rated for indoor use only.
How do you adjust HC-SR501?
You will want to set the jumper on the HC-SR501 to the “L” (no repeat) position for this to work correctly. You’ll also need to set the TIME to the minimum of 3 seconds, turn the TIME potentiometer as far counterclockwise as it will go. Set the sensitivity anywhere you like, I suggest midpoint for starters.
What is the pinout of the hc-sr501 PIR sensor?
HC-SR501 PIR Sensor Pinout. The HC-SR501 has a 3-pin connector that interfaces it to the outside world. The connections are as follows: VCC is the power supply for HC-SR501 PIR sensor which we connect the 5V pin on the Arduino. Output pin is a 3.3V TTL logic output.
What are the specifications of the hc-sr501?
The specifications of the HC-SR501 are given in the table below, note that there might be small differences between manufacturers. The HC-SR501 has a maximum sensing distance (detection range) of 7 meters. You can adjust the sensing distance by rotating the sensitivity potentiometer CW or CCW (see picture above).
How do I adjust the sensing distance of the hc-sr501?
The HC-SR501 has a maximum sensing distance (detection range) of 7 meters. 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.
What are the solder pads on the hc-sr501 used for?
As can be seen in the image below, the HC-SR501 has solder pads for two additional components. These pads are typically labeled ‘RL’ and ‘RT’. RL – Here you can add a light dependent resistor (LDR) or photoresistor which has a low resistance under strong ambient light.