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HC-SR501 Human Sensor Module Pyroelectric Infrared
|Price:||$3.25 + $0.99 shipping|
Usually ships within 2 to 3 days.
- human sensor module
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- high quality
- HC-SR501 Human Sensor Module Pyroelectric Infrared
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|Item Dimensions||0.94 x 1.02 x 1.26 inches|
|Shipping Weight||0.02 pounds|
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Top Customer Reviews
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.
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?
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:
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.
Most Recent Customer Reviews
It has a good range,
I'd give it 5 stars if documentation and explanation of the components were not scarce.
Great for my thesis project
HC-SR501 Human Sensor Module Pyroelectric...It have used it it seems senitve enough, with the Arduino on a beadboard set up.. Read morePublished 2 months ago by Donald D. Giesler
I live these tiny motion detectors. Great range for a little PIR.Published 2 months ago by Anonymous
I used this as a proximity sensor for a Halloween project to have a creature wake up as people approached and go back to sleep when no one was around. It worked flawlessly.Published 3 months ago by B. Dolfin
Out of several sensors I tested this was the most effective for detecting a human walking by. Actually I needed to set the sensitivity quite low as I wanted to detect in the 2-4... Read morePublished 6 months ago by Richard Rys