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Stemedu Pack of 5 HC-SR501 PIR Sensor Infrared IR Body Motion Modules for Arduino Raspberry Pi Review

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Revainrating 4 out of 5ย ย 
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3.8
๐Ÿ“น Motion Detectors, ๐Ÿ•ต๏ธโ€โ™‚๏ธ Security & Surveillance

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Description of Stemedu Pack of 5 HC-SR501 PIR Sensor Infrared IR Body Motion Modules for Arduino Raspberry Pi

๐Ÿšฉ This HC-SR501 PIR motion sensor can turn on devices by detected motion. Automatically and quickly open various types of incandescent, fluorescent lamps, buzzer, automatic doors, electric fans, automatic washing machine and dryer Machines and other devices. ๐Ÿšฉ Using Potentiometer 105, output timing is from 0.5S to 200S. Operating voltage range: DC 4.5-20V; Quiescent Current: <50uA; Trigger: L can not be repeated trigger/H can be repeated trigger(Default repeated trigger). ๐Ÿšฉ Usage: HC-SR501 can use as a hightech products. Suitable for companies, hotels, shopping malls, warehouses and family aisles, corridors. Or use for the security zone automatic lighting, lighting and alarm systems. ๐Ÿšฉ HC-SR501 Infrared PIR Motion Sensor for 3 pack: https://www.amazon.com/dp/B0897BMKR3. ๐Ÿšฉ If any question, how to contact us? Please click โ€œStemeduโ€(you can find "Sold by Stemedu" under Buy Now button), in the new page, click โ€œAsk a questionโ€ to email us.

Reviews

Global ratings 5
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Type of review

Revainrating 3 out of 5

Motion detectors are ok, best

So here's the thing, they work great; if they work at all. 3/5 of the sensors I got always either didn't detect any movement or registered everything as movement. I decided to help him when in doubt and try to eliminate every possible glitch and no bones. It wasn't until I tried my fourth sensor that everything magically worked and to be honest I don't even know if the fifth works because I'm too scared of messing up my current setup.

Pros
  • Few competitors
Cons
  • unreliable

Revainrating 3 out of 5

Output voltage was less than 3.3V

Motion detection works quite well. I tried using this to activate a 3V relay directly and had trouble activating the relay. Using a multimeter, I was able to find out that the output from these motion sensors is only 2.8 volts, which is just below the voltage threshold for the relay. Fortunately, the project also includes a Raspberry Pi, and 2.8 volts is enough to register as a high contribution to the Pi. So now I use the sensor as an input to the Pi and the Pi controls the relay. This part is

Pros
  • Hands-free operation
Cons
  • Very expensive

Revainrating 5 out of 5

According to datasheet HC-SR501 stops detection when temperature approaches 30 degrees Celsius

According to datasheet HC-SR501 stops detection ("detection range is shorter") when temperature gets to 30 degrees Celsius approaching (about 90 degrees Celsius). Fahrenheit). These units have through holes for adding a thermistor to improve high temperature performance in case someone needs to add a thermistor. I plan to lower my rating by one star for each device that continues to fail. The first three days I plugged it in, it worked very well. Easy to set up. The pins match well with Dupontโ€ฆ

Pros
  • Delivery was very fast
Cons
  • Crumpled

Revainrating 3 out of 5

Most of these PIR sensors stop working

Design PCB to turn on 12V cabinet light. Will have to stop using this product. Bought five. Three stopped working after about ten minutes. They light up when you first turn them on, but don't respond at all after that.

Pros
  • ๐Ÿšฉ When using the 105 potentiometer, the output time is between 0.5s and 200s. Operating voltage range: 4.5-20VDC; Quiescent current: &lt;50uA; Trigger: L cannot repeat trigger / H can repeat trigger (Default is Repeat Trigger)
Cons
  • Cable is shorter than other picks

Revainrating 5 out of 5

The output voltage was less than 3.3V

Motion detector works quite well. I tried using this to activate a 3V relay directly and had trouble activating the relay. Using a multimeter, I was able to find out that the output from these motion sensors is only 2.8 volts, which is just below the voltage threshold for the relay. Fortunately, the project also includes a Raspberry Pi, and 2.8 volts is enough to register as a high contribution to the Pi. So now I use the sensor as an input to the Pi and the Pi controls the relay. This part isโ€ฆ

Pros
  • ๐Ÿšฉ Application: HC-SR501 can be used as a high-tech product. Suitable for companies, hotels, shopping malls, warehouses and family aisles, corridors. Or use automatic light, lighting and alarm systems for security area
Cons
  • Power socket required