I am an Electrical Engineer and I say thank you for this video. You did a great job by warning people from the beginning of the video. I do not understand why some people are saying you do not what you are doing. You sound like a very educated person. You explained VCC and JDVcc very well. I did not know Vcc and JDVcc until my second year of college. It is a very deep topics in electronics. You used it a lot when learning about transistors. You are sharing your knowledge for free through the Internet. We all should be grateful and say thank you. Keep on the good work!

@RatomirFilipovic

4 жыл бұрын

Maybe coz he used blue wire for phase and green/yellow for ground... i admit green/yellow can be used as ground but only when there is no 0 in system... Blue=0, brow,black,grey= phase... Yellow/green= ground... and it is important to fallow this rules since hes doing 220v. There is also color matching for 24v,12v,5v and 3v and many other signals.... He did explain it kinda good but he made mistake no electrician should ever make...Thats how ppl die.

DANGER: NEVER USE THE YELLOW-GREEN CABLE AS THE LINE (HOT) WIRE!!! The yellow-green cable must be used for ground only. This is extremely important to avoid accidents. (Someone can get hurt if not by directly touching it, by touching, for example, the casing of a device that has been mistakenly “grounded” to the line). Also, you should always connect the ground terminals when they are present, as in this case, on both ends of the power extender. People using it might rightfully assume they are connected, when in fact they are not. Sorry for being so harsh, but this really needs to be pointed out to anyone blindly following this tutorial.

@danieltuba3843

Жыл бұрын

When a 5V guy works with 230V system. *painful facepalm*

@lekashameti6865

11 ай бұрын

oh waw!

@hugocarrasco7734

Ай бұрын

So does this mean “never cut the positive/yellowgreen wire”? So you should only break the negative wire? I’ve only heard this once. Can u explain again in further detail?

That's my second Arduino project and the intimidation factor is steadily decreasing. Thank you from 7 years in the future.

As I just started with Arduino, it is nice that people like you helping us out. I have 1 point that need some attention (I know you take no responsibility of any of our actions). In the powercable you cut the ground wire (yellow,green) to build in the relay. If someone uses a prefab power line and does it the same way.... the RCD will be activated. So please be aware of the color code of the wires (Europe is different than North America)

@nazranzafran3807

3 жыл бұрын

Europe use what

Finally, a video that illustrated to me the purpose of JD-VCC and VCC with the illustration at 4min mark. I say thank you for this video.

Great Video. Thank you SO MUCH for sharing the basic functionality of Relay with the circuit diagram.

Thanks for demonstrating this module with high voltage. It was hard for me to believe that relay could handle high voltage, even with the markings saying so, until i saw it.

I'd like to add that, if you did this and your Arduino resets sometimes when switching off your load, I'd bet that your load is inductive (motor, big relay, solenoid valve, any other electromagnetic device). You need to add a RC Snubber between the relay contacts (not the relay coil), in other words, in parallel with your load. It took me a lot of time to find this out so I hope this helps others. A 0.1uF capacitor in series with a 100ohms resistor rated for at least 1W should be enough.

@screeningstudio3868

2 жыл бұрын

Hi, thanks for that information and i have 1 question, lately i have been trying to connect my plasma with my arduino uno using 30A high volate isolated module relay, when i sending the command my arduino sometimes act like crazy, like resetting all the grbl settings, and delay too long to complete a g code command and also make my homing suddenly unavailable , is that because the plasma cutter is using high frequency to start the arc or because of the relay? The plasma machine is running 40A, but the relay is running at 30A maximum? Is the load is too much or it is because of the high frequency that make the arduino going crazy

Excellent video! I bought a cheap 2 channel relay with no model number or schematic. The explanation in the video and the schematics were very clear. I'm impressed with the little module and the optocoupler for isolation is very nice. Thank you for the video.

Great tutorial , simple and elegant. Saved me alot of time

Thanks for being clear about the optoisolator and why it's there.

Nice Tutorials bro. Explained in detailed. Awsome :)

Good, I was thinking about how do we wire up relay to microcontroller and your video showed the practical implementation, thx

Thank you just saw this video that's for the clear pics of the ac side of the relay. Now I get the proper way to connect the switch

Had to go through a dozen or more videos and or articles to finally get a great one. Thank you!

Great tutorial. I base my final year project on your tutorial on touch screen and this one, plus some sensors tutorials from other sources. One question. What software do you use to write circuit diagrams in this video? they are very clear...

Great video...I’ve been driving myself crazy trying to figure these out. I’m working on a garage door opener with he Particle Core processor, Blynk and these relay’s - it’s supposed to work on iOS.

hey, good idea, but you have to use the green yellow wire for earth and the Brown for switching the bulb on/OF , the blue musst be connected directly in both ends.

Amazing tutorial! Thank you so much

So removing yellow jumper allows you to use adapter to provide 5v to relay and protect your arduino board from frying?

Thanks for this video! It helped me a lot with my project.

Thanks for the tutorial, I am going to use the information you provide, however, I would like to know if the arduino would use standby voltage and run my power supply down.

A great video that forces one to think about the circuits. Everything in the video was done safely and exactly as it should be expected. It is entirely entertaining reading the comments below. Some of those comments really reinforce the old adage - "a little knowledge can be a dangerous thing". When in doubt, put an oscilloscope on the circuit and learn something new.

Nice video Dejan, could you please make another one about how to control ON/OFF state of some device by using manual switch and relay in parallel?

Good work with great clarity

Now I realized the use of jumper in jdvcc thank u man.

Very well explained. Thank you very much!

You should never ever wire mains wiring like that. Don't ever use the earth wire for the hot, use the black or brown for hot. The earth wire is never meant to carry voltage. Don't be lazy, strip and connect the correct wire as the hot! If the earth wire is used as the hot for the wiring in a house such as an outlet, an electrician may touch that wire thinking its just the earth wire and it doesn't carry any voltage. However because it was used as the hot the electrician would get shocked. I hope you understand how dangerous that is to wire incorrectly.

@yurikocraze1019

Жыл бұрын

Hot wire or not, consider all lines are live at all times , The main reason he should use proper color coding is to practice good practice for future.,

@intensecutn

Ай бұрын

​@@yurikocraze1019Exactly. For someone to get shocked by this would mean that two people have done the wrong thing. Two holes in the Swiss cheese were aligned. Treat them all as if they're live until you've confirmed that they're not.

Super helpful thank you. Can you suggest how to insert a fuse stage for safety?

Nice video! please, could you tell me what is the cad software used for your line diagram of the relay ?

i have one more question. can i connect a 12v adapter to JDVCC? i have that one for now

How did you controlled the light using remote.

Question I've got is on the power supply. I'm in the "making the sketch" phase of my design with some parts wired up. I would like to put my circuit in an double gang electrical box with 1/2 for low voltage and the other for high voltage (with outlet). I am looking for a small and cheap 5vdc power supply, but wondered after seeing this... would I need 2? Could a back feed from relay to power supply harm the Arduino (nano in my case) if the nano is drawing 5vdc on USB to power? Last question would be.... have you found any small, good and low cost 5vdc supplies to use in compact projects?

How would you connect the 120VAC to the relay if it were a 3 terminal high voltage wire? I assume the "live" wire would be connectect to the COMMON terminaal on the reay. and the Ground wire would not be cut from the chord, but what would you do with the neutral wire?

I have similar 4 channel relay with a removable jumper between JDVCC and VCC, however, I only have one ground pin. Does this mean my relay can not be isolated?

Also for this application, if there is a short circuit on the lamp, does it cut out?

this man single handedly made it possible to control basically anything, thank you, you truly are a great person for sharing this.

Great one .... Is it necessary to connect both the Vcc & JDVcc??!

@dominikkkkkkkkkkkkk

6 жыл бұрын

karar sabih yes

Lovely for concept clearing.

even if the micro-controller is connected in parallel with the 5v power supply will it still be in danger from the relay ?

can i connect this without having an external 5v adapter?

Do you have the earth/ground pin connected between your mains plug and socket? It looks like you might not - and you definitely should.

It was an informative video. But, I don't have a ground right next to the JD-Vcc pin in my relay, can I connect the ground of the 5V power source to the other ground pin which is along with IN1, IN2 pins? Kindly clarify. Thanks

Love the video. If I just wanted to toggle between two 220v lamps, would I need a unique program to run the arduino? Or could I use it's default setting? I.e., use a momentary switch to control low voltage to the relay?

@kennmossman8701

4 жыл бұрын

why use a uC?

I LEARNED A LOT. THANKS FOR MAKING THIS LOVE IT

@oceanofgaming

3 жыл бұрын

Never cut the earth wire. Brown and blue is for live and nutreal and yellow and green wire is for earth

i want to control a 24v dc mtor what should i do for the high voltage part ??? thanks for your help

Would I still have the the benif of the isolation if I'm using the same AC-DC power supply to power my arduino ?

Great explanation !

Dejan, do you have to put digitalWrite(in1, HIGH) in void setup? Does it not work if you just put it in void loop?? I am just not understanding what is the purpose of including this in void setup

Thanks very help for my project :)

Great info. Could this also be used as a 12v fuses box, so if one was running 12v devises it would protect them?

@inquisidiego

4 жыл бұрын

not at all. This is not a fusebox. It's a relay. If you try to use it as a fuse box, and exceed the rated current, then the relay will stop working as intended. Maybe it will still work for high currents, maybe it will short the connections, maybe it will break the connection. You don't know. A fuse box is made to cut the connection when the rated current is exceeded. It's used as a safety mechanism.

Hello, Thnx a lot for your great KZread, It means a lot if you share what you’re good in, so we can learn from each other. I hope you have time for a small simple question. Is there power on your relay coil when the NO contact is closed (when you’re hooked up appliance is on) like a standard relay or does it gets a pulse each time you switch on and off you’re appliance? Greats Bart

hi may i know what module to use high voltage around 6-10kv

Hello. Really nice and well explained tutorial. I have aquestion, how can you control a 220volt ac motor single phase (no servo but a drill) both in speed and direction (no positioning required). It would be great if you could help me :)

This is very dangerous what you are showing to people. Everything is superb but the part, where you are using the yellow and green wire for L (phase) is very dangerous. The correct way is ALWAYS black, brown or read for phase “L”, blue for neutral “N” and yellow-green for GROUND. Please remember that because you are showing people how to connect voltages and currents that are very dangerous. When electrician comes to you to fix the some kind of problem, to him is normal the color scheme that I wrote and if he would touch the yellow-green wire he would get killed or heavily hurt. But anyway thanks for tutorial and sorry for my bad English.

@kengaming789

7 жыл бұрын

where do i find the manual for that? i need to have valid references for my paper...

@expert20valvehlx

6 жыл бұрын

Are you sure that ALWAYS is like that ? If someone is electrician he will test if there's voltage before touching wires and there is huge banner in video itself, so please shut the fuck up!

@stienogamez8296

6 жыл бұрын

kondenzo fuck off, nothing wrong with it, if and electrician is working on it he always has to measure it

@mitchelll6359

5 жыл бұрын

Trusting color schemes is dangerous. smh.

@Marcin-fx6hz

5 жыл бұрын

There is grounding in plug and socket - on sides of them (its German type Schuko), so yellow-green should be connected to them. And please don't ever use Green-yellow for power supply! It kills people... Every electrician knows to not use it this way. Those who don't know are dead or in jail!

Which software did you use to draw the circuit diagram at 3:47. I could not find electric wiring and adapters in Fritzing.

@ratnatekchandani4421

6 жыл бұрын

sanjay rajure download from other third party sources.

Why is the DS1 diode required if the optocoupler has an LED in it pointing in the same direction? Is DS1 just rated for bigger currents?

Hi, one question, if we use Active Low module relay, the the green led light will constantly light up, does it mean the circuits is closed? Im kind of confused different between Active Low and Active High trigger, for Active High, the circuit is constantly open right? The green led light will not light up until we sent a 5V signal from our controller trough PWM pin right? Please correct me for better understanding between Active Low and Active High trigger, thanks a lot 😁

Hey guys, can I use this hl52s SSR AVR as a smart-switcher in a DC-UPS ? I mean to make Input-A preferred (the one from the Power supply plugged in the wall socket), and Input-B linked to a battery. So that when the PSU is unplugged /or there's power outage/, to automatically switch to input-B without interrupting the work of the end-device (in my case Intel Skull NUC mini-pc)? If not, can you recommend me such smart-2INs-1OUT-switch that supports input voltage 19~25V and max current of 8A?

So nice the world's best teacher

Which of the two wires in the cord do I connect to the relay?

Nicely presented video! I don't know what country you're wiring for. I think it's important to point out that you're switching LIVE or NEUTRAL through a wire that looks like it's colour coded for EARTH. In the UK , wiring standards dictate that the YELLOW/GREEN wire is EARTH. I'm sorry if I missed something in your presentation but I couldn't hear you tell us - what line (LIVE or NEUTRAL) you are switching. You most certainly should AVOID switching the NEUTRAL wire. AWLAYS place your switch (i.e the line 'break') on the LIVE ('hot') wire. Thank you.

@DavidJJJ

3 жыл бұрын

You are correct as others have mentioned you should never connect power this way with earth, he is using the wrong wires.

I had a question, I have had a touch time finding relays that can work uptill 30A DC, but at a lower voltage of 12V. Would these work for my case?

@kennmossman8701

4 жыл бұрын

use a SSR

Thanks for the video!

great job sir...!!! this video is really helpfulll for my project......thanks sir...

@punitchainwal1153

8 жыл бұрын

can I give 6 to 7 volts to relay module with adapter....is it harmful fo ckt?

Hello thanks for the video how to control the light using online terminal ? I don't want to use the delay

One question tho , Should i connect the blue wire to the relay

HI mate i made a similar setup but instead i used an AC socket(outlet) connected to the relay but everytime the relay is triggered (i.e. turned off bcos the socket is connected to the normally open interface), the arduino shuts down why is this happening?

hello Dejan. How do get the fading? The relay can go only 1or 0 (connect/unconnected) and I cannot see any Triac in the circuit? Do relay rotate?

@timkoufogazos2621

6 жыл бұрын

That is the camera compensating for the change in brightness (auto-exposure)

great detailed video. the only thing you forgot to mention in your video is the the relays have input and output terminal. i saw you had a phone charger rigged as an input for the relay. i loved the way you explained the schematics. 9/10 presentation. i dont know if this tutorial is geared for begginers.

@samgarcia9521

8 жыл бұрын

+Dejan Nedelkovski correct but you still need a source of power to go into the relay and out to the component you want to power. you never mentioned this in your video. for example if you were doing and electrical outlet you would do the same thing you did with your setup but in this case you use the same power cable interupted by the relay if you were doing a home

@samgarcia9521

8 жыл бұрын

+Sam Garcia what i mean is you didnt make your power out of thin air . i see you have a surge protector as you power source you have your phone charger plugged into it thats you input to the relay. and the output would be to your light bulb ,heater,lamp

@samgarcia9521

8 жыл бұрын

+Dejan Nedelkovski great job overall ty so much

how can i use it in a ultrasonic sensor setup to run 24volt motor?

hi how can i controll speed fan220v with lm35

Great video sir I've understood the working of relay

Hey, Could you pls explain the reason why a relay could have its normally open pin stuck and always closed. I ended up damaging 2 relays out of a 4 channel 5V relay module when turning off/on my laptop charger. However the relay used to control my speakers and monitor is working fine. Now I am not using other relays to control laptop charger fearing to lose another. What should I do?

Does it need to stay connected to a PC to work and how to power it? I want a guide for say bidet is being powered as in using power that it disable an air con on same plug to socket connection

Hi this is really cool vedio get good explanation of relay activation on low. I have questions 1) what if the Arduino board power off, in that case does it sense the low on pin and relay activate or not? 2) how to configure relay activate on high do we need different relay module for this?

For me i don't Know what is the purpose behind Low trigger Relay but it is simple to inverts them by connecting the IN1 to GND and the VCC off the relay module to a digital pin of an Arduino , the JDvcc to a 5V power

I have only Two way channel in my switch board. How can i connect + / - wires in this case? Please help

why do you need a second diode after the optocoupler if the coupler contains a diode of its own

What is the second Vcc for And can I use the same power supply (jd Vcc power supply) for the second vcc

Thank you for the video! Can anyone please explain me whats wrong with the wire colors that he used? Whats the difference and why is everyone pointing this out? thanks

I'm Coding using PY & GPIO on rpi 4, I'm new to Relay but I just check this video out because I'm so confused when I try the relay & send signal as low the relay LED comes on while sending high turn the relay off. Good thing I watch this so now i understand it is reversed. Does all 5v relay work this way (Low-On, High-Off)?

Thanks for the demo. Now I understood why the relay turned off when I apply High signal. Can you please make a video on AC light dimming using Arduino.

@jstuffss

6 жыл бұрын

it dims because of the cameras compensating for the brightness

hello actually i needed relay program for arduino atmega 2560 can u help

hi there, this is normal situation of turning on and off the devices, is it also possible to control the intensity of light and speed of fan using this method ! ?

@kennmossman8701

4 жыл бұрын

no

Nice shema!

@DejanNedelkovski Can I use this kind of system to control a bigger machine like a single conveyor machine?

@kennmossman8701

4 жыл бұрын

use a SSR

Very usefull channel. Thanks

Can I use 12V 1A adapter to power up the Arduino Uno ?

can I power the Arduino from the same source as the GDVcc???

@sahilshukla8127

6 жыл бұрын

MEndeavour yes you can power arduino from JdVCC but if something unusual happens then it damage both , the power supply & arduino

hi, why need a separate 5V supply? the Arduino 5V output should be ok right?

@kennmossman8701

4 жыл бұрын

the inrush current of the relay may affect the UC or related circuits

can we On and off arduino automatically using relay?

being new you showed the hi and low settings when you added 5 vdc from another source (pin 1...LOW pin2 common,,,,pin3 high), don't really under stand schematics but the other source of 5vdc hooks to pin 1 where the jumer would be positive,,,,and the not shown where does negative go

so good, many thanks :)))) !!!

Thank you for the diagram.🙏

Nice tutorial sir! I'm just starting out with Arduino, and I'm planning to build a SMS controlled farm water pump. Can you show us how to control arduino using txt messages/SMS sir? Thank you

sir it is possible to use this module if i plug a aircon or a refrigerator? thank you for your response

@kennmossman8701

4 жыл бұрын

the relay is rated at 10A given inrush current, could be used for up to 500 Watts for an inductive load look at using a SSR

Can arduino uno controlling 20-channel relay? please give me the scheme if it could

Nice info. Very helpful for me

@HowToMechatronics

5 жыл бұрын

Thanks!

If i enable optoisolation i.e power my relay board through external supply , should i connect the digital ground pin of arduino to the GND pin to the right of the digital pins on the relay board ?? what will happen if i do that ? do i loose the optoisolation ?? how does that happen ?

@kennmossman8701

4 жыл бұрын

I wouldn't connect