Arduino Tutorial 25: Understanding Photoresistors and Photo Detectors
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- Опубликовано: 30 июл 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...
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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
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.
The Physics and Math part of these tutorials is my favorite part. Good on you for trying to educate the masses.
2024 and this is still the best series ever.
not really another series on youtube
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!
Please do not stop explaining how things work. This is what makes your videos so much better than others.
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.
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
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.
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!
I appreciate you "teaching us how to fish"!!!
true
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.
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 RUclips 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!
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.
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!
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 👍
Paul, your video's are very articulated, greatly appreciated. My 10 year old boy has learned a lot from you.
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
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.
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!!!
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.
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 RUclips 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 ruclips.net/video/83WEPcDJky4/видео.html to have your mind blown to where he takes you. BOOM.
You gotta do whatever the job requires. Good on you, Paul!
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 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!
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...
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.
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.
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 are the best teacher
Just for reference, my favorite parts of your videos are the those where you explain how things work.
We do not hate when you explain how things work. Instead it is more interesting to me. Love your lessons.
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!
great lesson, love the depth and theory you go into. It allows us to get a whole understanding of what we are doing
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 RUclips videos that don't touch on the math behind the science.
Paul, your attention to fundamentals is foundational. You make the deep magic transparent.
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
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 ✌🏻
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!
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
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!!
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 😂
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.
BOOM! Am at half of your Arduino tutorials. Explanation is really clear ! I enjoy watching. Thank you!
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
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 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 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!
PLEASE don't stop teaching the way you do! understanding the hardware and math is infinitely valuable!
Prof McWhorter,
You're doing a great job. Those that are not writing nice notes are not willing to learn and do the work.
This series is awesome! Love your teaching style, knowing how things work! Thanks for teaching us this way!!
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.
Still the best tutorial on the Arduino on RUclips, 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.
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
Hallo Uncle Paul. Christiaan here from South Afrika.
Please do not take the hate comments personal. You do you!!! I think more 80% of us apricate you more because you explain and share your knowledge with all of us.
I don’t think I’ve ever thanked you for these videos. Thank you! And don’t stop explaining how the devices work🤲🏼
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!!
Thanks for this tutorial series, I'm very much enjoying them. The understanding content is very much appreciated and sets it apart from other copy me videos on RUclips. I also enjoy the rewarding use of colour LED's on some projects.
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.
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.
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.'
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!
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 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.
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!
Thank you for continuing to teach the math and physics behind each of these components! I greatly value your explanations.
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.
Great tutorial! Really enjoying the "why you see what you see" aspect of it. Please continue to include the physics, chemistry and math aspects!
A big thank you for these lessons. I love the back to basics approach and the maths behind it.
I rarely write comments on youtube videos I watch but your teaching style is amazing.
Great to hear!
after 4 years I arrived this video you are great Pual thank you man!!!
Hello Paul, Good lesson. I like the fact you have us work out the problems during the class. I think it is important that you do go over the math and physics. Thanks for all the hard work.
Just subscribed to your great channel. Thank you for your passion and kindness to share this fun stuff with the world. You have been getting more ornery as videos progress, all the more fun. :) This is what great human beings dream and do, to help one another and make the world, and this short life, a better place. I am almost 57 years old and it warms my heart whenever I think of your selfless and highly committed acts. Thank you Paul, I feel like I have known you for a long time. I am certain your family is proud of all that you do. I don’t have to tell you, nevertheless, stay curious as ever and keep on trucking. Thank you.
I agree with Bob totally!!! Keep taking the time to delve into why things work!
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.
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!
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 :(
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!
Please keep explaining. It really helps me understand the engineering behind these little magical components. I enjoy your lessons!
Glad you enjoy the lessons. Thanks for the kind words
Thanks again Paul. No hate from me. I most definitely want to learn how the physics and math works too. When and where I went to school there were no science labs or equipment so all we had to learn was the theory. Now I have some means of bringing this to life and your tutorials are making it real for me. These are the best tutorials I've seen about anything on the tube. Your videos are benefitting thousands.
Love your style. I know you made these awhile ago, but I'm enjoying these tutorials and I'm learning a lot.
keep doing this content, it is literally the only really good arduino tutorial i found and im enjoying the lessons!
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!
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.
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!
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.
Confidence level is higher every lesson.Thanks!
Very good!
Enjoyed this project. I'm fine with the theory portion helps me remember things I get a little fuzzy about. You can do some fun and interesting things with this sensor. Thanks Paul.
Love that you explain what is actually happening. Keep up the great work!
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!
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.
Another one down! Love it. Not sure why anyone would hate. I am here for the knowledge not a quick fix for a project. See you on the next one!
Thanks for explaining the physics as well as the concepts. Helps me wrap my head around it. Keep up the good work!!
I'm an Arduino beginner, i'm on the beginner lessons for the Arduino Uno. I have a photo-resistor and so i came to this video, part 25 and understood everything.
Awesome and clear explanations make this possible :D
Also the theory helped out
Please remain steadfast in explaining the theory. Many of use blew this information off because we figured we "never would need this stuff" and low and behold we do need it. You are giving us all a second chance to expand our horizons and have fun doing it! Kennedy
BRILLIANT explanation!!! no pun intended! I'm a professor in three specialties and you are very gifted at explaining!!!
Thank you for explaining. Please don't ever stop explaining it is truly helpful. Also, I did write my code differently with a while loop instead. So its awesome to see how you wrote yours.
I love these videos! I teach special education and working on these allow me to challenge my brain a little bit when I get home. My goal is to design some adaptive devices to use in my class with the students. Thank you for all that you do.