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Arduino Tutorial 25: Understanding Photoresistors and Photo Detectors
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- čas přidán 3. 08. 2024
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In this lesson we learn how a photoresistor works. We look at the solid state physics that allow the resistance to change with changing light levels. We then make a simple project where the arduino switches LEDs based on whether or not there are lights.
You can get the kit I am using for this series at the following link:
amzn.to/2I7N4Ek
Also, you can get the Mastech Digital Voltmeter I am using here:
amzn.to/2Ks9nHN
You can get more details on this lesson at our WEB site HERE:
toptechboy.com/arduino-tutori...
[Disclosure of Material Connection: I am a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. This means if you visit the link and purchase the item, I will receive an affiliate commission. Regardless, I only recommend products or services I use personally and believe will add value to my readers.]
#Arduino
Great Lesson for someone who wants to learn the nuts and bolts , glad you are not changing your teaching style for the haters.
I could hook up circuits all day long from Scematics have done that since the 80s i am here to learn the math of the electronics and the control aspects that the programming allows. if they do not want the math and all and just want to hook up a circuit they can use a simulator but anyone can do that the understanding is how you build one concept on the next to build a complex circuit. ok rant over.
ther r more lovers than haters if he changes his style the lovers will turn haters n the haters will turn lovers resulting in the loss of paul ;
Lol, not only is he carrying on his most excellent lessons, he is calling the haters out in a humorous way; sorry there is going to be more of what you hate....love it.
Please don’t ever stop explaining how things work!
yes your videos are very educational
True that! Love the explanations. Helps to truely understand what is happening
35:48 "a lot of hate?" No. Math, physics are the core of our computer science. People should feel proud to master them.
true
I believe this is computer engineering as opposed to computer science; computer science is software and algorithm based, where as computer engineering is more hardware based. They don't regularly teach this in Computer Science programs-- which is why I'm here watching these videos.
very true it is important to learn what is undrethe hood'
@Alexander Kloeden There are always people in a hurry. They don't want to make things instead of learning how it works
@@rexbarr_5783 yeah computer sci include apps web dev etc etc and computer engineering is full of robotics and all things
but sometimes in computer sci, when you will learn python opencv you will see phy and math are also useful in computer sci
opencv is a module of python which help us to create real world application like face, hand detector
The Physics and Math part of these tutorials is my favorite part. Good on you for trying to educate the masses.
Please, never stop doing the math and phisics!
yes!!! PLEASE don't stop doing the math and physics!!! It's awesome to understand the why as well as the how!!
keep it going Paul!
the fact that you explain things in depth is the reason Im learning arduino from you
Same. I went through the elegoo kits "lessons" and they were basicly code with zero explanation or expansion. Love these explanations.
2024 and this is still the best series ever.
not really another series on youtube
Please do not stop explaining how things work. This is what makes your videos so much better than others.
Who the hell gave you hate over explaining this stuff? Please do not stop explaining these things, it's great, thank you so much
i dont know who is complaining about how you are explaining how things work, but those explanations have helped me exponentially
I did not complain either. I am glad Paul made these tutorials just like he did.
Samuel
I appreciate you "teaching us how to fish"!!!
true
The time spent explaining how something works is well spent. I've worked with too many Engineers and Managers that get lost because they don't have a basic understanding on how instruments give them information an how that is transformed into a measured value of what you want. Knowledge is worth something and is critical when you have to rely on subcontracting or purchased services. Please continue to explain things. Even when you know the subject matter there's something to learn from different presentations.
Learning this without the background math is like learning to drive in a car with no engine. Keep up the good work !
- Former Special Ed math student, turned engineer....turned Healthcare worker.
Please do not change your teaching style. I love that you take the time to explain everything and show us the math. I went to DeVry for the electronic technician program and Im using this as a refresher as well as a hobby, and i'm relearning everything as well as some things for the first time and its all because the hard work you have done. Thank you!
As someone who has spent most of the quarantine time re-learning electronics and researching for a wearable startup idea and falling deep down the rabbit hole of CZcams electronics tutorials, your content and presentations are just incredibly good and one of the very best out there! Kudos and massive respect to you Paul!
I, for one, really appreciate that you are giving us the background and the underlying physics and math so we can understand what we are doing and why it works. As Taylor Swift says, haters gonna hate. Ignore them, I'm sure I'm not alone.
Another fantastic lesson and I love the math and physics descriptions that really make these lessons sink in so I have an idea of what is really happening. After this lesson, I view my outdoor lights that come on each evening as it gets dark in a very different "light". I very much enjoy the challenge when you give a "homework" assignment so I can test myself; otherwise it is too easy to get complacent and just copy what you type. Thanks again!
In the book "Think like a mathematician" by the German math PhD Christian Hesse, he wrote that the ancient mathematician Paul Erdos loved and drank lots of coffee and Erdos said mathematicians turn coffee into math principles". I thought this was interesting and reminds me of your trademark "Pour yourself a big mug of coffee." So I'm sharing this. Lol
Bob Paul Erdös lived until the end of the 20th century. Hopefully that’s not what we’re calling ancient these days. Also, in addition to turning coffee into theorems, he was said to use high grade meth amphetamines for the same purpose. He was certainly an iconoclast.
"...Iced coffee." ;)
@@ericwright5271 Weird, a distant cousin of mine does meth, and now he's an idiot with no teeth.
@@zackhenderson2392 That went dark real quick...
don't stop the explanations please, they are gold dust, its one thing to write the code, its a whole other level to understand why it physically works. The in depth component explanations are a big part of what makes your videos great!
I used the RGB LED with the photo Resistor. When the lights were on I programmed the RGB LED to output a purple light and when the lights were off I made it into a bright white light! I am doing all of this all thanks to you, Mr. McWhorter!
Just for reference, my favorite parts of your videos are the those where you explain how things work.
Paul, your video's are very articulated, greatly appreciated. My 10 year old boy has learned a lot from you.
Don't pay attention to the haters.
I am a math and physics teacher who will be the advisor to the Arduino club next year.
You explanations have been useful as a model of how I can explain how these work to my students.
Absolutely love your videos. My current professor only has so much time to teach and there is a foreign language barrier that makes understanding a little hard sometimes. I always watch your videos right after a lecture because your explanations go a little deeper and it truly helps me understand what's going on. So thank you for all that you do.
As a Junior in EE, I have found this series extremely helpful. Thinking of making a temperature sensor or using the joystick module to control a fan to put as a project on my resume. Great series of lessons!
when you build this, i would appreciate if you publish your paper, a link so i can read the abstract. i am doing exactly the opposite. i bought a toy windmill, (a real toy) with comments it could not charge a battery. i do not think the thing even develops the amps to overcome the internal resistance in a battery. that is why i'm taking this course, to publish a youtube video on battery charging and wind turbines.
my degree is IMET, and i have training as a wind turbine tech, trained on the big wind turbines you see on the side of the road.
I used this video and made my own project with an RGB, photoresistor, and a servo. Depending on the color of the RGB the servo points to the correct color. Super helpful lesson
We do not hate when you explain how things work. Instead it is more interesting to me. Love your lessons.
after 4 years I arrived this video you are great Pual thank you man!!!
Paul, you're explanations are awesome. This is one of the rare series where people learn what's behind all of this stuff. You might not need all the background information for your projects but knowing this stuff, those details, just makes people better at what they do. I hope you keep going! Greetings from Belgium.
You are the best teacher
It helps a lot with your nice calculations and diagrams, sometimes it's hard to keep up, but after a while it gets better. Thank you so much for the nice oak vasions
For those with no knowledge in electrics and that got confused at 12th minute where he explained the need for a resistor - get yourself "Delmars book of electricity" and go through topics series, parallel and combination circuits and you'll understand why.. Book is with plenty questions at the back at the end of each topic.
It helped me a lot to understand this topic.
God bless you Paul for your work.
Paul, I have been following the entire series since you released. You set out to be NEW and improved, you have done just that, by breaking things (concepts) down, excuse the term "Potato Head Style" , a true meaning of 101 Beginner. I'm diesel technician that set out to learn the Arduino programming platform. The background is great on the physics and math. For those moaning and griping , they need to look elsewhere, a more advance series on CZcams perhaps. Maybe Paul will release a more advanced series in the future. Your 101 (Beginner Series) is Great. Thanks in advance for your current and future efforts. Looking forward to the rest of this series.
LOL, Check out Paul McWhorter awesome introduction to AI on the amazing Jetson Xavier czcams.com/video/83WEPcDJky4/video.html to have your mind blown to where he takes you. BOOM.
You gotta do whatever the job requires. Good on you, Paul!
Another “most excellent” explanation, this time on how photo sensors work! Not to worry though about those who seem to think their head hurts when learning. They will eventually find work asking people “do you want fries with that?” (If they are lucky!
PLEASE don't stop teaching the way you do! understanding the hardware and math is infinitely valuable!
I do love how you describe how the things actually work... it makes it easier to understand now when you know that sensors are a form of resistor.
This was a really interesting lesson. I personally like the maths and physics part, because it helps me understand what's happening inside all those wires and it is than much easier to be able to do the things on my own.
great lesson, love the depth and theory you go into. It allows us to get a whole understanding of what we are doing
There is so much joy and motivation when the homework is done correctly.
I don’t think I’ve ever thanked you for these videos. Thank you! And don’t stop explaining how the devices work🤲🏼
What a *wonderful* explanation on photoresistor! So clear. So precise. So simple.
The math of it? It separates Paul's video from other "popularization" type of CZcams videos that don't touch on the math behind the science.
Had trouble with this homework because I forgot my pinmodes! duh! Afterwards it worked fine.
i used a while loop instead of a if statement, but finally figured it out 😂
It was so much fun showing my wife and 4 boys. I got to show them the green and red LEDs and how they light up based upon the code, the readout on the serial monitor, and got to explain the circuits and the readout pin.
Thank you
That is awesome!
Paul, your attention to fundamentals is foundational. You make the deep magic transparent.
I'm actually going through your playlist, and I enjoy learning more about this ^_^
Thank you so much for your hard work, aaand I've done the assignment and it went perfectly well !!!!!!
Thanks teacher ✌🏻
Thanks for taking the time to explain the nuts and bolts of stuff. That leads to people that are able to expand their projects beyond the lesson experiment. I have been playing (self taught) with micro controllers and simple electronics for 12+ years and still watch your stuff because you do things in a different way than I have done it before. There are multiple ways of doing things and no one way is the “right” way. Your explanations always reveal an alternative. Thanks!
PicAxe was my first microcontroller and the things I learned there work just as well with Arduino but BASIC is a lot easier to use for beginners. I still use both but Arduino is now my go-to micro.
Appreciate you taking the time to provide detailed explanations, drawing diagrams, and math equations. It provides clarity in each lesson. Thank you for what you do 👍
Totally agree that we need to understand the principles involved. Keep going in depth as far as you think necessary.
I appreciate you explaining how things work! I think that's what a lot of tutorials miss
Wow, thank you! To get the coding right the first time while your video is paused, is so awesome...even though I had to wash the dogs while the video was paused, to come back, code the micro, and see it work the first time, and to see my code matched yours (except for the pin numbers, but hey!), is so confidence building. Thank you again! And please keep up the math and physics, I can always use a refresher!
Your homework is the only homework I don't procrastinate on. You're an amazing teacher love your work, keep it up
Wow, thank you!
Thanks Paul for your lessons. I am 64 and retired and was in the HVAC sector. I appreciate you explaining how things work, because I retain information told to me if I know how they work and not just do it this way!
Keep up the good work! I am enjoying very much the lessons and I have projects lined up. Can’t wait to get to the end of this series.
loving that fact that you actually go into depth to help out the people that DO really wanna learn and not copy and past, really appreciate your time and effort thanks again
I can't for the life of me understand how anyone could hate on these lessons!! Your teaching style has got to be one of the best I've ever experienced!! Haters gonna hate I guess!! Don't let the haters bring you down Paul, you're doing an amazing job with these lessons!!
THANK YOU!!!
Honestly, this is what sets you apart from the other instructors of Arduino. By explaining the component in depth, we are able to grasp how it functions and won't have any doubts once we start using it. Personally speaking, I find your explanations really clear-cut and straightforward which has really helped throughout this course and even for my studies in uni. Keep up the good work! Screw the haters. They are just lazy bums who can't be bothered to learn.
Prof McWhorter,
You're doing a great job. Those that are not writing nice notes are not willing to learn and do the work.
I like the way you do things, it's why I watch your videos. I want to learn how to do it myself and I know I'm not alone.
Definitely don’t hate that you go into all the grit with the lessons, I love it! These lessons have been amazing, I’ve went from knowing nothing to knowing a lot already! I was so close to getting the coding right on this homework too😑 off by 1 word.
I'm one who is very thankful that you take the extra time to explain why things work and the math and physics behind it all. Excellent videos.
Homework was successful! Understanding why the components do the things they do, helps immensely. I even exclaimed "No! We don't use constants!" when you put the 350 for the lightVal.
I totally appreciate your teaching style. we can't gain the real concept of things without being told the actual science and maths behind them. So keep diong what u have been carrying on so far...bestowing us with the treasures of your knowledge!
I spent an hour wondering what I was doing wrong. After watching this video, the details made me understand why my circuit wasn’t working.
You are a true teacher :)
Great job!
That is what troubleshooting is all about. Once we have some problems with our circuits or our code, then we figure it out, and it becomes a little easier next time to figure out the problems.
I cant remember which lesson(s) you said you'll have to teach us how to read resistors, but I find reading them on a multimeter, A LOT easier on the eyes. BOOM!
Thank you for these tutorials Paul! I started watching these with no prior knowledge of Arduino, coding, building circuits, or anything of the sort, and really enjoy learning the details of why and how all the pieces of the puzzle come together to make something. Looking forward to learning more!
You're doing EVERYTHING right Paul, Please don't ever change a thing. I believe the majority of viewers came here to learn how this all works and you are doing a great job doing just that. Lesson 25 and I already have a much better understanding of the Arduino, can't wait to see it all through, but will be sad when it's finished :(
Keep explaining the how and why. I really enjoy the math and it's great knowing the reason why things are the way they are!
I personally am super grateful that you explain how things work. It's super necessary for the engineering of things!
Glad to hear it!
Paul, as a Physics enthusiast I love the way you explain everything that goes behind each component of the Kit. Thanks again for another great video!
Subscriber from Spain!!
I did it! I wired it up and coded it by myself without watching ahead! Thank you for your tutelage! I, as an an old dog, am definitely learning some new tricks. And...ignore the haters about the math and the physics behind the how and why these things work. I would imagine that there are a number of us who want to be able to do more than simply cut and paste. I, for one, am one of those who...at the end of the day...wants to know how these things work. Thank you again.
BRILLIANT explanation!!! no pun intended! I'm a professor in three specialties and you are very gifted at explaining!!!
When things go wrong, I say "Darn!" When they go right, I say "BOOM!*!" And I now hold my breath to get things to work. I am a changed man, and I also know how to program and understand the Arduino intimately! Thank you, Paul! Much love!
I really do hold my breath while waiting for code to compile. Always have, not sure why.
I bought my Elegoo kit 2 years ago and went through the models of just copying the code from the kit's PDF. Your videos are exponentially more educational. Thank you so much for these videos!
I did walk through other training programs and copy and paste code, but since I started with this program, I;ve learned so much more!
By the way try the homework and only follow you when I get stuck and I watch each lesson to the end then figure out we’re I went wrong enjoying this series.
Love the fact that from what I have learned so far from your video series, I already have an idea of how to build a security alarm with a lot of functions :) thank you
Because of work, I was out of this wonderful series for almost 2 weeks. Went back at it today. And because of your detailed explanations and the fact that I'm taking notes, I was able to go back to my notes and completed the assignment for today, on my own, perfectly. Thank you so much, Sir!!
Confidence level is higher every lesson.Thanks!
Very good!
Mr Paul you're too good at this I literally can solve most of the previous lessons problems in my head and I'm combining them
Another great lesson. You are absolutely right about learning how everything works. It takes your skills to a new level. It is sort of like the difference between riding on an airplane or being able to fly it.
Keep up the way you are going, these lessons are perfect for me, i never did physics at school so i am constantly learning from you, also my maths after leaving school were pretty basic so the way you are teaching is sinking in really well and i am soaking it all up
Hi Mr. McWhorter, I did the homework and first wrote it with an if statement and then rewrote it with a while loop just to see if I could. I'm so proud of myself, thank you! I can see the MAGIC!
Dear Paul, My son and I greatly enjoy your lessons. Your knowledge, enthusiasm and good humor are very much appreciated. Thank you and long may you run
Hi Paul! I know this is an older video, but we are watching these lectures for our class! I have to watch through lecture 40 by Wednesday so today I followed your advice and had an iced coffee to refresh myself while working. Thanks for the great videos. The past 25 have been fantastic.
Cheers.
Excellent!
Hi Paul, Chris P here from across the pond.
Re your comment about not going into the workings behind the code and how the semi-conductors work. PLEASE don't stop the explanations and the maths. I'm a member of the silver topped generation that left school and college long before semi-conductors were even thought of. I can still remember the first electronic calculators coming into the office. Before then we had slide-rules and logarithm table to calculate with. I am finding the world of electronics and programming facinating the way you teach it, so please keep going with the present format.
Power to the iced coffee.
Chris P.
I actually love this videos because you explain all the physics and math behind them. no need to copy rather understand. Thank for your efforts.
Still the best tutorial on the Arduino on CZcams, am really enjoying the series. You made electronics fun again after working as a technician for 20 years. I think this was a great time to practice the if ...else statements instead of two if’s.
I love the way he explains. Sometimes I don't want to see a certain item I CAN SKIP FORWORD. keep up the good work. I watch some of these over and I simply skip ahead of the parts I don't want to see again. I know this is old but I still want to rant and rave. Keep on posting the way you do. A+
Thank you, Paul. I really appreciate when you explain how these circuits and components work. A lot more valuable than just saying: 'Here is the circuit, here is the code. Have fun.'
I agree with Bob totally!!! Keep taking the time to delve into why things work!
Math was never my interest until starting this course now I see the importance of understanding it and why its needed. Another great session Paul, thx
I have been in technical field(mostly software) for around 4 yrs. Now building my base in electronics and one thing I have learnt is that if you grasp the basics, life is a lot easier along your journey. If no solid basics, life hard, you spend weeks debugging on simple bugs arising from lack of basics and it's difficult to for you to design original and authentic stuff. It's irritating and you can even end up quitting
Thank you for continuing to teach the math and physics behind each of these components! I greatly value your explanations.
This series is awesome! Love your teaching style, knowing how things work! Thanks for teaching us this way!!
Keep teaching the basics! Not everyone out there is a tech. I have recommended your vids to my younger less learned co-workers exactly because of the basics. Advanced people, use the scroll bar and fast forward. Thanks Paul!
Yet another really informative and clearly explained lesson. Thanks very much, Paul. I did manage to work your assignment out, much to my surprise, and thanks to your most excellent teaching methods. Love the way that you explain how things work, too; adds another dimension to working with electronics. It's nice to know WHY something works...not just, like, "stick the red here, stick the black here...blah blah blah." NOTHING is learnt in this way; repeating everything parrot-fashion, without understanding of HOW it works. Your teaching methods are sound, mate....and please don't ever change the way that you teach. Regards from the Grumpy Limey in England. Cheers!
BOOM! Am at half of your Arduino tutorials. Explanation is really clear ! I enjoy watching. Thank you!
Btw I am watching these vids because you explain everything. I wanna know how things actually work so keep doing it please. Still from 2022 I am learning soo much.
Love the explanations; I don't like doing stuff when I don't understand it. Not saying I understand all of it first time, but I then go back to previous explanations. Awesome teaching style!
Great tutorial! Really enjoying the "why you see what you see" aspect of it. Please continue to include the physics, chemistry and math aspects!
Thank you for your explanation. How could people give you hate for what you have taught? Teachers are the subject for respect. Great teachers - for great respect.
A great respect from me! Keep it going! Society lacks caring teachers.