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HC-SR501 Human Sensor Module Pyroelectric Infrared

4.3 out of 5 stars 119 customer reviews
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  • Product Type: HC--SR501 Body Sensor Module
  • Operating voltage range: DC 4.5-20V
  • Quiescent Current: <50uA
  • Level output: High 3.3 V /Low 0V
  • Trigger: L cannot be repeated trigger/H can be repeated trigger(Default repeated trigger)
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Product Description

HC-SR501 Human Sensor Module Pyroelectric Infrared
Features
Product Type: HC--SR501 Body Sensor Module
Operating voltage range: DC 4.5-20V
Quiescent Current: <50uA
Level output: High 3.3 V /Low 0V
Trigger: L cannot be repeated trigger/H can be repeated trigger(Default repeated trigger)
Delay time: 5-200S(adjustable) the range is (0.xx second to tens of second)
Block time: 2.5S(default)Can be made a range(0.xx to tens of seconds
Board Dimensions: 32mm*24mm
Angle Sensor: <100 ¡ã cone angle
Operation Temp: -15-+70 degrees
Lens size sensor: Diameter:23mm(Default)
Package Include:
1* HC-SR501 Human Sensor Module

Product Information

Product Dimensions 1.3 x 1 x 0.9 inches
Item Weight 0.3 ounces
Shipping Weight 0.3 ounces (View shipping rates and policies)
ASIN B007XQRKD4
Item model number 3-01-0120
Manufacturer recommended age 12 months and up
Best Sellers Rank #49,646 in Toys & Games (See Top 100 in Toys & Games)
#230 in Home Improvement > Safety & Security > Home Security & Surveillance > Security Sensors
Customer Reviews
4.3 out of 5 stars 119 customer reviews

4.3 out of 5 stars

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Customer Reviews

Top Customer Reviews

By M. Diehl on January 5, 2013
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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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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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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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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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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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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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It arived on time and is in good condition. I haven't had time to work with it much but I did hook it to my Arduino to get 5 volts. When I move in front of it the L E D goes on and off. At first I pluged it in to 3.3V but the LED just went on and off so I pluged it in to 5 volts and it seems to be working. I read somewhere that I might have to experment a little to get it to detect Humans.
So, I don't know just what that means but I'm going to find out. Check back, When I find out I'll let you know.
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Got it working in 10 min. Works pretty good. It's not made for a bread board. A few jumper wires and it was connected directly to my Arduino with no breadboard. Specs are readily available by Googling HC-SR501. If you can't or don't want to find the specs, it's still really easy to hook up. 5V VCC, Ground, and a signal pin. Signal goes high (3V) when motion is detected. It detects me pretty much anywhere in my 11 X 20 ft living room. Also detects my dog (45lbs). Works good to detect motion in my unused rooms - very inexpensive intrusion alarm. I haven't played with the delay or sensitivity because it works as is for my needs. It will connect to most any microcontroller, not just the Arduino. I have it connected to a PIC12F675. For the price, it does the job quite well.
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