Step 4: Testing your PIR

Once you have your PIR wired up its a good idea to do a simple test to verify that it works the way you expect. This test is also good for range testing. Simply connect 3-4 alkaline batteries (make sure you have more than 3.5VDC out but less than 6V by checking with your multimeter!) and connect ground to the - pin on your PIR. Power goes to the + pin. Then connect a basic red LED (red LEDs have lower forward voltages than green or blue so they work better with only the 3.3v output) and a 220 ohm resistor (any value from 100 ohm to 1.0K ohm will do fine) to the out pin as shown. Of course, the LED and resistor can swap locations as long as the LED is oriented connection and connects between out and ground

Now when the PIR detects motion, the output pin will go "high" to 3.3V and light up the LED!

Once you have the breadboard wired up, insert batteries and wait 30-60 seconds for the PIR to 'stabilize'. During that time the LED may blink a little. Wait until the LED is off and then move around in front of it, waving a hand, etc, to see the LED light up!
<p>Hello, can anybody please help me with this? I was wondering if there was some sort of filter that I could place in front of the pir module, that would filter out any low temperature objects and only allow high temperatures to trigger the sensor (body heat). I plan to mount the sensor on a rotating turret, and when it spins I don't want the sensors to be triggered by the moving background (walls, bookshelves, etc.) thanks.</p>
<p>Hey! can the PIR sensor also detect a bird?</p>
<p>hi i am using PIR for last 2 months..Now i measured the output voltage and found it is 3.1 volt. (u said its 3.3v) Is my PIR is dead...or is working fine.? plz help </p>
<p>its not working for me. when i plug everything in and upload the sketch the led comes on and stays on. in the serial monitor it says motion detected. my pir does not have a jumper on the back but it does have three pads. there is 2 pots on it and i tried adjusting them but it didnt seem to help. i got the pir on ebay (http://tinyurl.com/led58rm) if any one can help that would be great</p>
<p>In the data sheet the pins you have marked are used to set the trigger in either single or repeat modes. I tried using the system in single trigger mode by soldering the 1st and 2nd pins but it seemed to heat up the system. I then soldered the 2nd and 3rd pins(Circled in Red) and it worked all right.</p>
<p>ok i may try soldering them together and see what happens. :) </p>
<p>Somewhat similar problem - My sensor detects even there is NO movement. So I changed the pots so that it lowers sensitivity. no help.</p>
Same problem and sensor can only get it to turn off after a minute under a box.
how to if i want used 3 PIR for the sensor?
<p>I have python code that monitors multiple sensors on my page.</p><p>http://tigermountainsprings.net/wp/index.php/6-pir-infrared-sensors-and-the-coop/</p>
<p>please how can i connect it to a loud alarm and an halogen bulb?</p>
<p>Can i adjust the range to be 0.5 feet not 20 ? or it's fixed .</p>
<p>What does it mean if the LED is flashing at a very regular interval? Almost like it's on a timer? It's not random. </p>
<p>Excellent tutorial!!</p><p>Hats-off</p>
<p>If still required, Pictures in Step 1 is from the &quot;Infrared Parts Manual&quot; by &quot;GLOLAB corporation&quot;. Hope this helps :)</p><p>http://www.bucek.name/pdf/re200b.pdf</p>
<p>If you want to make your own wireless PIR sensor, try out MySensors motion sensor example:<br><a href="http://www.mysensors.org/build/motion" rel="nofollow">http://www.mysensors.org/build/motion</a></p><p>Arduino library on Github:<br><a href="https://github.com/mysensors/" rel="nofollow">https://github.com/mysensors/</a></p>
<p>How to connect two PIR sensor in one circuit which connected with one light??? If i cross either of the sensor means the single light which is connected to the circuit should glow.</p>
<p>Very nice tutorial! Just want to share this place where you can get the HC-SR501 PIR sensor for cheap: <a href="http://voltatek.com/en/sensors/69-motion-sensor-module-hc-sr501-pyroelectric-ir-infrared-adjustable.html" rel="nofollow"> http://voltatek.com/en/sensors/69-motion-sensor-m...</a></p>
When testing, is the resistor necessary?
<p>..the resistor is needed for testing with LED (to limit the current)</p>
what if i would like to turn on a relay when trigger? <br> <br>thanks! <br>marC:)
<p>buy this </p><p><a href="http://www.ebay.ca/itm/310566336050?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649" rel="nofollow">http://www.ebay.ca/itm/310566336050?ssPageName=STR...</a><br><br>very easy to use</p>
What would i have to do so that it alerts my phone when motion is detected?
<p>gsm shield and a activated sim card and some electronic basic supply</p>
How much current can the module deliver to the output? <br> <br>Great write up. Thanks.
<p>not really, he copy and pasted it from the website he linked.</p>
Hey there guys, i would just like to know does the PIR motion works with other programming such as C programming and such. Another thing is, is it possible to do this: <br>When sensor detects, LED lights up <br>When sensor x detect, LED would dim instead of off. <br>Thanks. Your reply would be highly appreciated. <br>
<p>I actually just posted an Instructable recently that essentially does what you are asking. Only thing you would have to change in the code is the PWM value in the analogWrite() function from 0 (which is totally off) to 50 or so (which would make the LED shine dimly). </p>
WOW! Thanks for this tutorial!! I love it! Thanks for doing this!!! 11 thumbs out of 10!!! :-) <br>
Hi, <br>I would like to know if PIR sensor can tell me that the person in range is moving toward to the left or right? Is it possible or I need something else to detect? <br> <br>Thanks!
Are you still selling the sensors on your website?
hi We sell this PIR sensor my web is http://en.nysenba.com and my email is lily@sbcds.com
@mhaziq <br> <br>Yes, it is possible to dim the LED upon detection.
Great tutorial. I am looking for tutorial where i can turn on some kind of camera with motion sensor and arduino. Rurn it on,record some video or take a few pics and turn camera off. i am very new in programming and arduino. Can you give some advice where can i find something similar, please!
How would you increase the sensitivity of the PIR sensor using Arduino? (using code) <br>I'm doing a project, and coding in Arduino.
I'm going to use one of these to detect opponents in air-soft wars. Is there any material that i can cover the sensor with to protect it from BBs but will still allow IR light through?
A 1/4 piece of Lexan (polycarbonate) should do the trick. You can heat form it to fit the pir using an automotive soldering iron and a suitable metal form. It's a tricky thing to do, so practice in an open area, being wary of overheating the lexan, of any fumes, and of starting a fire.
is it possible to change the LED into a servo, and if it is what other changes do i have to do? thank you...
can we use this PIR sensor at night, for example, a remote area with no road street lights. please reply...thank you..
This detector can detect a car? For example, a car on the road. I make a mini project on road safety. I want to put this sensor to detect the car. Will it be applied? I just want to find out.
gr8 tutorial.. got one of these for 2 $<br>
i did this step and it doesn't work :( ideas???
Some more info here on using these with Arduino:<br>http://arduino-info.wikispaces.com/Brick-Pushbuttons%26OtherSwitches#Motion
I have just the sensor (TO9 can package) itself. A PIR D203S. The datasheet tells me how to hook it up: 5V, Gnd and Signal (it is an analog device). But it tells me very little about the signal I will be getting. Short of dragging out my O-scope and doing the testing; do you know what type of signal I should expect? This module from LA you use is nice, but I'm using my own uController so I wouldn't get the clean digital signal you show. BTW Wonderful writeup! you would make my old college profs proud.
opps, it a TO-5 package not a TO-9
huh, got 10 of these super cheep from my school used, now i actually know what they do!
PIRs are great - it is quite easy to connect a PIR and LED (strip, bar, rope, single LED, etc) to a battery and provide light, when needed, to a closet, cupboard, drawer, stairway, hallway, room, etc.<br><br>Or instead of the LED connect to an activator of some kind - its great they price has dropped and the they are available as a 'component'.<br><br>We have an excellent factory making them here.
10USD seems a bit high, as I can source locally for under 5USD. <br><br>Two models in 3 versions;<br><br> w or w/o photocell - 3 to 5V or 5 to 12V - fixed sensitivity<br><br> w or w/o photocell - 3 to 5V or 5 to 12V - adjustable sensitivity<br><br>The output can be 3+V (for most digital logic) or Open-collector (solid state switch).

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