Where should PIR sensors be placed?
The Most Effective Placements for your motion sensors:
- Corner Spaces. Put a motion sensor in the corner of each room, aimed toward the doorway.
- Near Valuables. Place motion sensors directly at your most valuable items.
- Outside Patios.
- Second Floor Bedrooms.
- Basements.
- Ceilings.
- Within Decorations.
Is HC-SR501 good?
4.0 out of 5 stars Works, but somewhat inconsistent… This PIR works fairly well. It comes with no documentation, but it’s fairly straightforward. It functions most of the time like it is supposed to, however there is occasional delay or no response at all.
What is the range of HC-SR501?
7 meters
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 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 high up should you put a motion sensor?
Overall, a motion detector should be mounted on the wall, between 6 and 8 feet high. Some people also put their motion detectors on or near the ceiling.
Why is PIR Sensor always high?
You need to check if the voltage on the PIR output switches. Use a multimeter to measure the voltage between OUT and GND. If you don’t see any change in level then you may need to add a “pull-up” resistor. If you have a 10 k resistor to hand then connect that between OUT and the 5 V supply.
What is the range of PIR Sensor?
Since PIR sensors have ranges of up to 10 meters (30 feet), a single detector placed near the entrance is typically all that is necessary for rooms with only a single entrance.
How much current does a PIR draw?
No matter whether an animal, a burglar or maybe yourself – if something moves in the coverage of this passive infrared motion detector, action is triggered. The PIR motion detector reacts to the heat radiation of moving bodies.
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).
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.
How long does it take for the hc-sr501 to initialize?
Just like other PIR sensors, the HC-SR501 needs some time to initialize and adjust to the infrared levels in the room. This takes approximately 1 minute when it is first powered up. Try to eliminate any motion in front of the sensor during this period.
What is the maximum sensing distance (detection range) 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).