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  • HC-SR501 Human Sensor Module Pyroelectric Infrared
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HC-SR501 Human Sensor Module Pyroelectric Infrared

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List Price: $10.99
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Product Specifications
Color Name HC-SR501 Human Sensor
EAN 0627385135396 , 0610395246251
Import Designation Imported
UPC 610395246251 , 627385135396
Specification for this product family (See all  products)
Brand Name RioRand
Part Number RRS50PCS2N3906
UNSPSC Code 41113600


Product Features

  • human sensor module
  • pyroelectric infrared
  • high quality
  • fast ship with usps

Product Details

  • Product Dimensions: 1.3 x 1.2 x 0.9 inches
  • Shipping Weight: 1 ounces (View shipping rates and policies)
  • ASIN: B007XQRKD4
  • Item model number: HC-SR501
  • Average Customer Review: 4.2 out of 5 stars  See all reviews (60 customer reviews)
  • Date first available at Amazon.com: April 26, 2012
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Frequently Bought Together

HC-SR501 Human Sensor Module Pyroelectric Infrared + SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue) + 2pcs nRF24L01+ 2.4GHz Wireless Transceiver Arduino Compatible
Price for all three: $14.48

These items are shipped from and sold by different sellers.

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Product Description

HC-SR501 Human Sensor Module Pyroelectric Infrared


Customer Questions & Answers

Customer Reviews

Does what it's supposed to do, and you can easily find blog posts detailing how to get this to work.
J. Gutierrez
I've hooked it up, but at the most sensitive setting it seems to detect motion that I'm not aware of in the room (heater blowing air?).
Roger M.
I had to replaced this unit with one from a different brand and I have yet to have a problem with the replacement.
Stuart Schwartz

Most Helpful Customer Reviews

71 of 72 people found the following review helpful By M. Diehl on January 5, 2013
Color Name: HC-SR501 Human Sensor Verified Purchase
I bought this one and one by Parallax. The Parallax one (which was more expensive) had 2 settings. Low and High sensitivity. This one has a pot that controls the sensitivity and another for the timeout (according to another post). The thing I like most is that the white globe does not turn bright red like the Parallax. I'm using this for something more discrete where a glowing-red-light would distract from the work.
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66 of 69 people found the following review helpful By BuzzAndy on October 13, 2012
Color Name: HC-SR501 Human Sensor Verified Purchase
The documentation for this item is incredibly hard to find. The "HC-SR501" name describes the actual sensor component (vs. the whole board), so that doesn't help much. A more complete spec is here:

[...]

It's for the DYP-ME003 sensor module that incorporates the HC-SR501 sensor.

There are 2 potentiometers (one that sets the distance btw 3M-7M), another to set the timing delay (5s-300s). On this specific item, however, there is NO JUMPER to set the trigger mode.

I hooked this up to my Arduino Uno, and found that the potentiometers are not that accurate, so this is only good for very rough applications vs. anything that you might want to use that requires reliable distance sensitivity.

That being said, it's pretty inexpensive, so worth it if you just want to mess around. If you truly need "distance sensing", go for the HC-SR04 ultrasonic sensor that gives really accurate distance...or maybe tie them together?

Happy Making!
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72 of 76 people found the following review helpful By Jason Wright on April 18, 2013
Color Name: HC-SR501 Human Sensor Verified Purchase
As a novice in the embedded field, I struggled to get this working at first. I set up my arduino to check the signal from the sensor every 50ms, and there appeared to be many false-positives returning from the sensor.

I later realized that the sensor will output HIGH on occasion just to signal that it is still active. Under a constant stream, the output looks something like: "0000000000111100000000001111" always with 4 HIGH in a row.

In my loop that checks if the sensor is actually "tripped" I simply checked for combinations of HIGH in groups more than 4. This has been working flawlessly for the last few months, and I have absolutely no complaints.
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18 of 19 people found the following review helpful By Jason S. on December 19, 2012
Color Name: HC-SR501 Human Sensor Verified Purchase
Good price for a project motion sensor, but came with zero documentation and no jumper for the mode selection header. If you need documentation, instructions or specs, do a web search for DYP-ME003.
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11 of 12 people found the following review helpful By AlphaPoppa on March 3, 2013
Color Name: HC-SR501 Human Sensor Verified Purchase
I chose this rating because the PIR sensor works well enough for the price, but I dinged it because it doesn't come with any sort of documentation.

Mine came with the jumper and the pots aren't crazy exact, but they work for me since I am just learning about electronics.

If you are going to use this with an Arduino I highly recommend you either get header stackers and/or male-female breadboard cables. A hacked servo extension cable would work too. The capacitors that come on the board make it impossible to attach this to your breadboard/Arduino without modification.
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14 of 16 people found the following review helpful By S. L. on March 4, 2013
Color Name: HC-SR501 Human Sensor Verified Purchase
This item has several model names and different variations.

There's a voltage regulator that accepts voltages from 5 to 24vdc.

At 5vdc it takes about 60micro amps. I'm running this on 12vdc and at that voltage it uses about 76micro amps.

The middle pin, output, puts out 10mA and 3.3vdc. so if you connect a green LED from the output pin to ground (negative), you'll see a dim glow when you put your hand in front of it.

You can directly drive an NPN transistor.

If you move around in front of the unit, it sends out an "on" pulse, then off. Even if you keep on moving it will still shut off. After a few seconds, it will switch on again if you move. So its on again, off again. Think of those annoying public toilet sinks that are "touchless". So if you want this to be a bathroom light for example, you'll need a separate timer - think of something similar to a computer screen saver, as long as you keep moving your mouse.

Here's one being powered up:
[...]
[...]
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11 of 12 people found the following review helpful By Certified Trainin Agency on March 19, 2013
Color Name: 100Pcs 2N2222A Verified Purchase
the 2N2222 transistor is one of the most use transistor
for electronic kits building class projects.
amazon 100 - 2N2222 about 14 cent a transistor if go
Radio Shack same transistor cost $ 1 .49 cent I put that
number in my training book on electronics John Hall
electrical instructor .
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7 of 7 people found the following review helpful By William Zettler on June 17, 2013
Color Name: HC-SR501 Human Sensor Verified Purchase
Works great with arduino UNO and can be used upto 20 feet away (Maybe more, have not tested it more then 20 ft). We are using it in our upcoming haunted house and bought one for now to see if it works and how we can program up our own for the scenes and props. The single unit we received is TINY but the dome on the top of the unit is what helps the signal scatter better to tell the unit what is moving. You could pretty much use this to turn on lights, trigger scenes or what ever else you can think up. Easy as heck to use and get running. Was up and running within 15 minutes once I figured out how the cables went to the unit. Would def buy again from the seller and a great product if your in the market for a motion detector.
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