How PIR Motion Sensors Work - The Learning Circuit

PIR or Passive Infrared sensors can detect movement by comparing variations in heat radiation of objects in their field of view. In this episode of The Learning Circuit, you can learn more about the different types, how they use lenses to increase their range, and interesting technical details about PIR sensors. Hit play to watch another great lesson from Maker Karen and be sure to check out the follow-up video where Karen shows how to use a PIR sensor in a circuit by making a motion activated snow globe: bit.ly/36njZAP
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[@doa2758]

Ms. What a wonderful "theatrical" presentation - your set is appropriate to your subject, your presentation skills, diction, eyes to the camera, voice quality - all excellent. Not to mention the information presented - clear, informative, good tips. I'm a new subscriber!

[@TexMexJoe]

Very informative! I have always seen those thumb print ridges on old sealed beam head lights and wondered what they were for. Now I know what they are called, thanks!

[@MrCardeso]

Thanks, Karen! I have actually been considering a project involving PIR sensors.

[@nicholascohen852]

Brilliant! All the information I was looking for, and more. Thank you!

[@husnainrafiq9689]

I always b waiting for your videos this is very useful for us . I request to you please make a video on thyristor family like Diac Triac and SCR. How they work their uses and checking method.

[@geoffwade8144]

Well done, I’m particular your description of fresnel lenses was good.

[@eatingplaydoh]

I like how you present things. Many thanks!

[@funkykong9001]

Thank you so much for this video! I've always wondered how these worked and also learned about Fresnel lenses as a bonus!

[@maxkiama3318]

Thanks for sharing this,i plan to do a pir sensor controlled street light project

[@bagasinka9471]

it's the easiest explanation that I can understand. thank you very much

[@bladder1010]

Very good and thorough explanation. Very succinct. Thank you.

[@mavericklast2555]

Looking to be an electrical engineer and I own an arduino (barely use it) but these videos are so helpful creating circuits will now become a full-time hobby

[@ohmslaw6856]

My advice if you are planning to take EE or EET.. focus more on actual circuits and not so much into coding.. arduino is an amazing tool but it's kinda cheating a tad bit lol

[@elkhunter307]

Same thing. I’m designing a fully automated garden running the PLC on a micrologix. I want to see if I can add an IR sensor to detect hail with a discrete output to control a motor connected to a sun shade or awing to cover the garden in a hail event.

[@jonlee2186]

Wow!! outstanding video. Thanks for the detailed explanation.

[@prabakaranpalanivelu]

thanks for the deep explanation😊

[@michaelschweizer2115]

Interesting episode. Thanks a lot.

[@rezkalif]

Thanks for sharing, great presentation

[@manimirmohammadrezaey9876]

Thank you so much. It was amazing

[@alexanderd.m.565]

This is excellent! Can you do one video explaining Radial sensors? O microwave sensors, I think this is very important for many users and buyers

[@MondoLeStraka]

Question. Is it possible to use a PIR in a vehicle for detection of say, the bone density of passenger? The information would be used on airbag deployment. TIA.

[@1StefenM]

Interesting - thank you! Was curious as i've recently installed a security system. Cheers.

[@ky4tgtodd203]

Another great video! You are such an awesome teacher and I always look forward to your next videos! Thanks for sharing. 73 - KM4OCJ

[@alfredkaserekasivanzire9488]

I have RE200B. It requires an LM324 op amp and a thyristor. But the power cannot automatically be switched off! What more can I do to make a movement sensor?

[@kabandajamir9844]

So nice thanks

[@gopalpillai9190]

HI, I will like to get some information ,application for High Mast tower , 20mtr tall/ 2500w . PIr or micro wave , which one works better. Also suggest the best brand.

[@RGOR30]

Thanks now i know what my sensors for light use

[@Aisha-vs8vd]

Can you share the ppt used in the video plz

[@danielforrest3871]

Nice job..

[@malgailany]

Very informative and easy to understand. Thank you!

[@shphp1289]

Thank you Guru 🙏🙂

[@learntoday8850]

Mam can you please tell how many pir sensor required to cover 1acre land

[@paulkazjack]

Very nice.

[@sebastianthomas8507]

i love learning circute

[@AGN5]

Good job. I love you.

[@FAlexandersb]

Thank you a lot for this video. I was wondering about the response times of this kind of sensors to detect movement and motionless; what are the orders of these response times? Are they same order? Do they depend on the 2 or 4 configurations (number of pyroelectric elements)? Thanks again!

[@maker_karen1785]

It kinda depends on which sensor you're using. You should be able to find that information in the data sheet for each sensor. I've seen some that are very laggy and take a while to sense motion while others seem almost trigger happy and respond seemingly instantaneously.

[@skd6240]

Will bulb glow continuously when humen have been standing or sitting continuously in front of PIR sensor?

[@mesfinhaftu6206]

I don't have idea what your co-workers feel you're amazing

[@jericholapinid5995]

How "hot" or what temperature should it be so that the PIR sensor will detect it?

[@diyoregonnowtexas9202]

Are PIR motion sensors compatible with different systems? If not can you make them compatible?

[@Citnos]

Thanks!, now I know how that funny looking sensor on my motion sensor bulbs work

[@tinkmarshino]

I have used PIR's to turn on my lights in the shop.. It has turned out to be real handy and I am glad I changed over. But I am more of a fan of the rcwl 0516 microwave sensor.. But that is another video..

[@zombieregime]

We have occupancy sensors on our bathroom switches (installed with newly built home...) they use a PIR sensors to detect non-occupancy and turn the switch off after a time of no change in the sensor. The fun part about PIR near infrared is that it cant see through glass, so when in the shower it doesn't see the movement, just a uniform warmth. It was fun the first time we figured that one out....at 9PM.....while rinsing out shampoo..... So we have them set to maximum timeout (45min) effectively negating the benefit of the occupancy feature. Luckily we dont forget to hit the switch on the way out (out of compulsion), on the plus side the easy tap push button action makes doing so as simple as bumping the wall!

[@SHAHRIMMOHD]

is it metal object can detect too...

[@nightmare6909]

Please,can you explain about I2C , microcontrollers and microprocessors in next KZbin videos.

[@kunalsondkar3389]

PIR use in hot room in hot room temp. Is 95 degree centigrade

[@SLIVERGYM]

I've been wondering Can a pir sensor pick up something that is colder then a human body? Great video thanks for showing!

[@pikakun6624]

Yup! I’m pretty sure it says “if it’s colder or warmer” than room temperature, it’ll make a voltage.

[@SLIVERGYM]

@@pikakun6624 I have found out goes by body heat? if you wave a stick in over the pir sensor it will not go off. depends on what you need them for? I've made a few that go off with out the need for body heat. you can find them on my channel for ghost hunting

[@pikakun6624]

So a PIR motion sensor is basically a temperature sensor? (Sorry if this is a dum question btw XD)

[@Vansh_bhaiya.]

i not yet use pir senson but me and my frinend building a project and we are going to use it

[@Roshenbo]

👁️ 💚 🥓!!! 💯% Thak you for this!

[@florinbaciu2325]

From where can I get element14 stickers? ;)

[@dariocadorin9434]

8o;

[@patstandley5373]

Go to the element14 community and message us in the comment section of this video. Someone will reach out to you there.

[@cadribopraiseoyo5636]

Are there IoT powered PIR Sensors?

[@arnelcondino2634]

Hi Karen

[@TheBull06]

So... its magic.

[@TMNT3388]

Do you mean freSnel lens?

[@lancelottavola9685]

😉👌

[@ChrisLocke1969]

Lol is that a can of wine? 🤣❤

[@maker_karen1785]

Lol. It’s flavored seltzer water. The coozy says “Love Wins” not “Love Wine”. Though I do love wine.

[@zdenkokovac4557]

😃💞👋

[@otherthings01]

🙄🤝👍👌

[@internalinjectiontrulyhere6182]

Down the road dont get trapped or left signal right brain wise...let the dumb yeild buzzer traffic lose fuser.

[@Block1618]

It's pronounced "frez-nul", good video though

[@Alperic27]

Sorry... the contents is great... but the voice... quit the super high pitch pleaaaass

[@Phili.b2002]

Forgive me for loving you and specially your beautiful eyes.