PIR Sensors And How To Use Them

This video will quickly go over the operating principles of PIR sensors to get you to the point of being able to play with them yourself!
These neat little units that can be had for dirt cheap on EBay take the infrared energy that is thrown off of your body in order to trigger a logic (3.3v) level output, which can be used to activate a multitude of devices!
There are a few caveats however;
1: the power supply must be stable, I added a 470uF capacitor across the prower rails
2: the unit needs a few minutes to stabilize once it is powered up
3: there is a built-in time delay before it will re-trigger again
I'm sure that you will figure it out easily enough and be making your own projects in no time!
Thanks for watching!
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[@hello2803]

Hi, I’m an engineering student in England doing a project for my course. Appreciate the video, very informative.

[@Razvii]

So this is the prequel to the spoopy episode? Nice, I was planning on using these for a light

[@SecularMentat]

I think PIR's also use pulse detection to find motion. So if you've got PWM power it's going to constantly go on and off.

[@esecallum]

you can bypass the diode next to vcc as it consumes 0.78 volts and power it off 3.3v

[@flemming2jacobsen911]

For the "big" module: if you move the Vcc supply connection from the "bottom header" (Vcc, OUT, GND) to the "lower pin of the top header", you will bypass the on-board voltage regulator, and you can power it using 3.3V

[@esecallum]

you can bypass the diode next to vcc as it consumes 0.78 volts and power it off 3.3v

[@jonnygarland4741]

🤔I really did enjoy your video I was wondering about them sensors you are testing now I KNOW THANK YOU .

[@57MacT]

Interesting vid thank you!

[@SimpleElectronics]

Message me on Patreon, I'll send you the link to part 2; you were one of my first patrons (maybe even my first)

[@60pluscrazy]

This video is important 🎉

[@classifikation2526]

The PIR-Sensor has a intern 3 seconds delay time. While the 3 seconds it doesnt trigger.

[@davidpyper1688]

Very cool project. Why not add an audio output like a doorbell chime?

[@SimpleElectronics]

That's what's great with this thing, it just outputs a logic "high" and that means you can trigger a huge number of things with it!

[@techy9912]

how to change the logic level of this device? if motion detected 0 and 1 if not?

[@justinwest9081]

I have the first type. I cant get them to work. Do I need the resister to be there? That is the only difference. And I tried multiple power sources and voltages.