Arduino Tutorial 8: Understanding Pulse Width Modulation (PWM) and the Arduino Analog Write Command

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In this video we dive into how the Arduino Analog Write command really works. We connect the arduino to an oscilloscope and take a look at what the waveforms really are that are being generated.

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#Arduino

[supernova]

Some of the best camera work I've seen on the internet YouTube lessons.

[LxPrne]

The moment I knew Paul was my favorite teacher was when he felt the need to re-square his boards because it bothered him - then explain it bothered him. His organization makes me so happy.

I’ve been binging all of these over my 2020 Xmas break. Thanks, Paul, for putting these learnings together! You’re an EXCELLENT teacher.

[Каксваритьпельмени-ыч]

You: Trying to set a half brightness to the LED.
LED: -_-

[waynemoorfield]

I have worked all my life in the electrical/electronic field And I Wished I had a Tutor like you . I'm now in my seventies and still learning Thanks Paul You are the best .

[dettimp]

Your explanations are great: I'm a total novice and yet I understood perfectly everything you talked about.
Plus, I love the fact you're teaching things that allow us to understand what's going on, instead of just telling (for example) that PWM works the way it does "because it does".
I'm really glad I've found your videos!

[sho-nuff]

Your not rambling, your explaining, and I'm getting it. Thank you for doing these tutorials.

[sanjaykumarg]

"A real way of teaching engineering"
Well explained sir

[Ajaypurandare]

I can see my dream come true only because of your fantastic tutorials. I want to run a CNC machine using Arduino. I will be greatful to you for rest of my life.

[joshuacanlas]

lesson 8 and i've learned a lot about arduino and how to get a "caffeine overdose" from those iced coffee
HAHAH, thanks Paul McWhorter

[Arnickification]

Great lesson. I finally understand pulse with modulation. Showing the O scope and what you call rambling (which helped me associate previous knowledge with this lessons knowledge) was perfect. Keep the rambling!!! And thank you!!!

[jessar]

Really you are a fantastic teacher, it is a good way to explain PWM. now I understand PWM very well! Thanks.

[ChiodoDragon]

I'm a 50 year old technician that went to tech school before PC's were popular. Maybe it's the fact that I'm mature now and have a greater attention span but I think you are just a kind soul and it translates to a good teaching style. You are definitely taking the apprehension I had in learning Arduino and the associated programming to a manageable level. I've thoroughly enjoyed your lessons and look forward to learning more.

[collincruise]

I am a senior Electrical Engineering major at a good school and I didn't understand PWM at all when it was taught to me. Now it makes complete sense. Thank you so much Paul!

[alandignans]

I didn't really understand Pulse Width Modulation before but I do now. Watching you build the circuit, then actually seeing a pictorial representation of what's happening as you changed the values in the program really made it clear. A lot clearer than reading an explanation in a book.

[cacophonixgaul]

I might have learned this few decades ago and have forgotten, but the way that you have explained PWM is embedded such that it will never be forgotten. Thank you.

[p.informatico]

Even if I'm fast skipping these lessons, because I already know most of it (i studied a technical degree in telecomunications), I think that this is gold for beginners. Well done!

[alastairbutterworth]

It was interesting that when you dropped the pwm signal to 60 with the capacitor in the circuit the led actually cut out as the forward voltage was too low. This of course doesn’t happen without it as it’s being pulsed with 5v for a short time. So an led can run dimmer with pwm than it can with analog input. That’s really cool!

[rogthedodge]

Hi Paul. Yes understood PWM. Your teaching is great! I've seen so many poor teaching videos and read some poor books on the subject, that I'd given up. Your tutorials have me looking forward to what you're going to teach us next! As a 73 year old ex I. T. trainer that's praise indeed

[theadventuresofmikeandjami]

Hearing you say “hook a brother up” just cracks me up. Seriously though - these tutorials are GREAT! You are an amazing teacher. So clear and concise. Thank you so much.

[uniqueupdaterff]

I understood that Pulse Width Modulation works for an given Voltage in a given period of 4 milliseconds it stimulates b/w 5 volts and 0 volts and averages out the signal to get the desired o/p and also that capacitors will help us to smooth out the signals in every interval of time when voltage is being applied.
Thanks Paul, I understand it clearly you truly are a great teacher and also tech savvy
I'm glad I found your channel keep the work up!! ❤