Your work ethic is amazing

The first 3 months when i was starting at electronics i didn't understand a word you say in your videos, now when i watch your videos again it all makes a lot more sence. Your videos are great for people who already know how those things work and need more detailed explanation to truly master the use of it

That was great, what I would really appreciate is for someone to make a video going through 4-8 relays, where they have the relay in hand and then they show the exact same thing on digikey/mouser and go to the schematic, run down all the items in the absolute max/ normal operating data for the first one, and then just explain the differences and what they are all typically used for (ie Vswitch and Vload + in what application) and what you could safely get away with.

i can always "relay" on you, GreatScott

This was a wonderful video! I loved how you very simply explained the pros and cons of using Relays vs MOSFETs vs Triacs for switching loads. That was the best explanation I've seen so far. Thank you very much for creating and sharing this quality content.

That is the neatest left handed writing I have ever seen.

Thank you for the ethics and professionalism with which you make your videos. I enjoy each of them

That fuse holder is terrifying

Your way of explaining and writing is amazing.

I always stay up until like 2am on Mondays so I can watch your videos. Keep them up! The quality is amazing

I really appreciate your consistency of writing with the same pen

Great Scott, I've got to give it to ya. You've helped me understand about circuits more which has helpped me do more with them. A Massive thank you.

Thank you for the information. I'm just starting to mess around with microcontroller switching big loads so this guide helps put all the pieces together. :)

Your writing style and diagrams are lit... Perfect for satisfaction...!

I love your videos, Always keeping me interested in Electronics

The world's best teacher

Thorough analysis! Really appreciate these videos!

Man I f'ing love the way you break things down.

OMG, this is "Basics"? I'm going to have to watch this one again ... Great scott"s", excellent clear explanation. I appreciate you video's !!!

Hi, Just Wanted To Say I LOVE Your Videos!

Thank you for your videos! I have learned so much frim you. When it comes to quality, you are definitely king! Thanks!

Excellent video about Relays & Optocouplers. Thank you!

Love your vids. Very informative and super neatly drawn lol.

really nailed it man. awesome and so easy explanation. thank you man.

keep on teaching.

👍😊Another Great Video on Electronic Basics! Thanks for Lesson! I look forward to your Next one!😊👍

Very nice. Thank you for this work you do for us.

i was waiting for the time when you say " but there is a problem ", ha ha ha so getting used to it now, found it @3:45 . PS: you explain things just the best way i cold possibly think of. Keep up. Thanks.

As always, great video!

The best well explained video I've ever seen, amazing GS

I am the only one to like every end of video when he says : "Sssstay creative, and I will see you next time" ?

Impresionante calidad de trabajo y organizacion. Me encanta el trabajo que haces. Saludos desde España 🇪🇸🇪🇸🇪🇸🇪🇸🇪🇸🇪🇸🇪🇸🇪🇸🇪🇸

Great Scott , you are going to hit 1 million subs , congtats

Great job! I was waiting for you to talk about optocouplers :D

Hey Scott. A couple suggestions. I find it difficult to follow the diagrams when you're changing angles all the time. If this is to get out of the way of your hand, consider taking photos for the video after you've written the item down. It's also difficult to follow when the diagram isn't facing straight ahead. I realize you're trying to make it exciting, but there has to be some respect to what works and familiarity works. When we see the same diagram in the same position, it is easier to follow the message. If the position and angle change, we have to rescan the entire diagram just to see where you're adding this new information too. A second suggestion, buy a new highlighter. ;)

Ur channel deserve more subscribers.

Excellent video, thanks for making it.

Very helpfull. Thanks😊 greetings from the netherlands 🇳🇱

Good Job, I like your amazing presentation !

That moment when you learn more from a 8 minute long video that a 50 minutes long school lesson. This makes me wanna create a school where the lessons are based on UKposts videos from people like Great Scott, PracticalEngineering , Tom Scott

Thanks for the video. Im making a composite video switch so I can run lots of computers on one composite to HDMI adapter for my little vintage computer museum im making and this was super helpful

love these videos. thanks for making these

Awesome video and clear explanation !

Very well explained. Thank you.

Can you consider a diy or buy episode on RC radios??? Thank you for teaching me electronics

you're the best bro.

Thanks for another video, you always get me thinking. That could be a good thing, or a bad thing, lol. The dreaded transient spike, or sometimes called inductive spike in the RC drone world. It’s been a past debate with RC motors about how to handle the spike, the old way was an electrolytic capacitor. Most of the time not correctly specked for the size of the spike and people wonder why the FPV and ESC still blow. But the cap may help filter line noise for the FPV camera like an incomplete LC filter. The new way argued as you mentioned is the flyback diode (or sometimes called snubber diode) but placement in the circuit is a big factor also. Then newer TVS diodes these days are not just for huge spike like lightning, but they are making them now for smaller spikes also. Plenty of choices depending on the application. I never thought about using an optocoupler for inductive spikes in the RC application world. I was trying to find a one fix fits all solution, but every RC drone is different, different power, different load, different esc’s. I didn’t think I will ever find a 1 fits all add on solution for everyone, so I put the project in hold and forgot about it. I don’t use relays often as you could guess, relays are a little big and slow for RC flying planes and quads (drones). But it makes senses, same kind of inductive load spike with the magnetic coil in a relay like the electric magnet in a motor. I wonder how small them come, how fast they can be, and if this might be a solution also? Now I have to go back and review notes, look at this with a new possibilities and different angles. You gave me a few ideas on an old project I forgot I was working on. I might need to get back to that project now. Thanks for the video, Scott Update: As I’m typing this I realized the optocoupler wouldn’t handle the load, and to use it for the esc signal line only would not isolate the spikes I’m looking to suppress. So back to the trusty diode theory and testing when I have time.

You make great videos! Thank you for them

Great video man!

Once again.. Great video..

Yaay. I waited so much this video. Keep it up :)

Thanks Scott... 😊

Keep up the good work!

Wow! Great Scott 👍

Excellent video, thank you.

reallly amazing video

Nice explanation

excellent video!

Good work

I just just had them this week at work, now u you post a video about this, I gues u are in my company lol

Another good one.

great tutorial!

Great lesson

Great info! Thank you!

Hello Scott! I'm learning a bit more about phototransistors, and I have a quick question. What is CTR, and is it related to the activation current?

I fired 10 NPN transistors before I found your video on how back induction happens in the coil of a relay. Thanks.

Thanks Scott

Wow, these basics reminds me me of entering the class Elementary Classical Physics , and later thinking elementary to who? I had to listen to it several times; I catch more each time. Nicely done.; I learned a lot looking for a mechanical type relay (if there's such a thing, .. heh) like one operating by a motor and takes no power to maintain contact or disconnect. Like servo arm operated. Still looking lol .

Sweet video! Thank you.

I love your videos.

The hx711 is awesome, especially for the price. Load cells are incredibly sensitive, measuring fractions of a gram with relative ease. The only issue us having to "tare" the system before applying any weight. If you lose and regain power, with weight applied, you will have zeroed the scale with the included weight, which isn't always of great convenience, depending upon your application. Drift will also occur. There is also a "combinator board" available that allows you to connect multiple load cells together in wheatstone bridge fashion, that operate as one measuring device, though it's not absolutely necessary, it just makes things easier. You will find these in bathroom scales, where four corner load cells are used to determine weight, no matter where it is applied to the overall surface. Leverage is a factor in the beam type cells; all of the applied weight has to be "focussed" tons single point on the beam, if you want accuracy and repeatability.

Hey Scott, as always I'm looking forward on Sunday for your tutorial. could you make a tutorial about can network by using arduino or stm32? Keep up the good work!

Great video

*I love your Electronics Basics videos :)*

Thanks great Scott u just made that video which I wanted....:)

Most underared ytb channel ..u desreve 20M subs

Very useful!!! Thank you!!!

Nice work as always Many years, i am in the field of automation. Initially, i was using arduino with mechanical relays but always an error due to spike voltage even with flyback diode. After that i started with TRAIC BTA41 which can sustain upto 40Amp. My system is working fine I also used this traic with stm32 works great. In my opinion, Traic is much superior than mechanical relay. A tutorial on this topic from your side will be highly appreciated. Regards

Really, really nice, man! :)

Thanks man great Videos

nice video :-) always some good lessons !

Wow, Great Presentation! I love your presentation style. Your drawing and handwriting are clear neat and smart indeed! Thank you so much for your lessons. By the way, the voice is yours or artificial?

liked this a lot.. thx

Just for that relay from Portugal you deserve a like!! Gretings and keep the good work.

excelente amigo

good explanation in very simple way thanks bro

I used to work on fire alarm systems in Canada. North american fire alarm panels (Edwards, Mircom etc.) Uses relays, mainly for fire alarm bell and auxiliary systems triggers (elevator stop, venting systems etc.). Specially for fire alarm BELLS and not horns. If i'm not wrong : it's better for bells solenoïds, and because a bell cannot do the 3-3-3 standard fire alarm rythm. In this time, a relay is doing the job (one by Bell loop). But only once, i've seen only one Simplex fire alarm panel model that used MOSFETs, even for bells. Interesting. I didn't have time to check the circuit and see how it works without power loss.

Superb keep it up😘

For smaller form factor relays I've noticed datasheets indicating they aren't designed for high duty cycles. I have a 12vDC thermostat project where I plan to use mosfets & a quad opti-isolator IC due to space constraints. I located some tiny relays w/ contact rating of 2A which is about 2x the expected load, but the coils are about 800mW & the datasheet indicated they shouldn't be left on for long intervals. I'm still looking for a schematic of the existing thermostat's board to see how the switching is handled.

very nice explication

Hello GreatScott, your videos are amazing! I'm from Venezuela and Please pleaaaseeee make a video of all about SCR and a example of how to switch them for an AC-AC converter. I know triacs are morr useful but i'm interested on using SCR.

very nice video sir

There are also solid state relays. I work at a factory were we make electromechanical relays, some a lot more complicated than those shown. A lot of them have the diode you put on parallel already inside the relay. Overall, relays are very interesting pieces of technology that combine topics from science of materials, electricity and magnetism, even thermodynamics!!

Thanks for making this video for relay. I have a project that is on a Dark active switch LDR.Pls make a video for me .

optocoupler are COOL, I kinda guessed what it does though after seeing a video where someone used one in a coil gun design.

Thanks for this great explanation about optocouplers. I currently need to replace one. Can I figure out which one I need just by the Data written on it? In my case it says L13/34 817 C. Does this mean another 817 C will fit my needs? As far as I got to know the L14/34 stands for the production year and week.

Why does a fuse is placed in a live wire?Even though AC current alternates rapidly,the current should change its direction. Please Explain this.

Very nice

first love your videos get motivated 😉

awesome...but very basic. I like it.