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!
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.
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?
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)
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.
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
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.
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.
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.
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.
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.,
@@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.
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.
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.
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.
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!
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!
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
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.
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.
+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
+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
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...
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?
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
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
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?
Why did you choose the Arduino Mega board? Couldn't you do the same thing with the much smaller Arduino Pro Micro board? I understand the video is 7 years old.
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.
i didnt get this you say don t use yellow and green but yourself use that one ! i live in turkey and which color i should connect to relay if i use an extension cable like yours?
georghe hagi Mavi de olur önemli olan devreyi kapatmak. Kahverengi tesisattan kullanıcıya gidiş, açık mavi dönüş diye düşünebilirsin. Ama sarı yeşil topraklama olduğu için onu kullanmamak lazım güvenlik açısından.
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)?
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
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
Hello, Thnx a lot for your great RUclips, 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. Love the video. Excellent explanation. But I am confused as to why you did not connect the ground on the arduino to the ground of the relay (the one to the right). Referring to @3:51
I take it that the issue with the separate power for the relay is that if there is a short inside the relay, power from whatever device is connected will go shooting up the 5v line into the Arduino and kaboom: smoke and melted plastic. If this is right, what are the chances of it happening and could you put an appropriate diode on the line to stop it? I am a bit of a newbie so sorry if this is a dumb question.
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.
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 ! ?
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 :)
There is one part I don't get. If the Arduino isn't sharing a ground with the relay circuit, how is the signal passing through. My circuit skills are a little rough, so I didn't quite get it.
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 😁
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
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?
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?
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
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?
i m using this relay module for home automation project using IOIO OTG but this relay module is operatin by giving grnd of ioio to chnl 1 or chnl 2 WHY ??
Is there any way to power the arduino with 5v without using the usb cable? Because i want to fix it outdoor and I don't need to exchange batteries every period of time. I hope get the answer.. So many thanks
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!
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.
When a 5V guy works with 230V system. *painful facepalm*
oh waw!
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)
Europe use what
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.
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
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.
this man single handedly made it possible to control basically anything, thank you, you truly are a great person for sharing this.
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.
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
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.
Great Video. Thank you SO MUCH for sharing the basic functionality of Relay with the circuit diagram.
Now I realized the use of jumper in jdvcc thank u man.
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.
You are correct as others have mentioned you should never connect power this way with earth, he is using the wrong wires.
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.
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.,
@@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.
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.
Thanks for being clear about the optoisolator and why it's there.
Good, I was thinking about how do we wire up relay to microcontroller and your video showed the practical implementation, thx
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.
int in1 = 7;
void setup() {
pinMode(in1, OUTPUT);
digitalWrite(in1, HIGH);
}
void loop() {
digitalWrite(in1, LOW);
delay(3000);
digitalWrite(in1, HIGH);
delay(3000);
}
I LEARNED A LOT. THANKS FOR MAKING THIS LOVE IT
Never cut the earth wire. Brown and blue is for live and nutreal and yellow and green wire is for earth
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.
where do i find the manual for that? i need to have valid references for my paper...
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!
kondenzo fuck off, nothing wrong with it, if and electrician is working on it he always has to measure it
Trusting color schemes is dangerous. smh.
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!
So removing yellow jumper allows you to use adapter to provide 5v to relay and protect your arduino board from frying?
So nice the world's best teacher
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 don't get why you use PE wire instead of hot wire...
Others have mentioned it but yes, it’s extremely dangerous and not recommended.
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.
Had to go through a dozen or more videos and or articles to finally get a great one. Thank you!
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.
+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
+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
+Dejan Nedelkovski great job overall ty so much
Great tutorial , simple and elegant. Saved me alot of time
How did you controlled the light using remote.
Go with an external relay. It should only take a single pin from the Arduino to control, and I'd argue is safer, so long as you are using perfboard.
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...
Do you have the earth/ground pin connected between your mains plug and socket? It looks like you might not - and you definitely should.
Amazing tutorial! Thank you so much
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?
Good work with great clarity
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?
Great video sir I've understood the working of relay
Super helpful thank you. Can you suggest how to insert a fuse stage for safety?
Thank you for the diagram.🙏
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
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
What is the second Vcc for
And can I use the same power supply (jd Vcc power supply) for the second vcc
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?
Why did you choose the Arduino Mega board? Couldn't you do the same thing with the much smaller Arduino Pro Micro board? I understand the video is 7 years old.
Great one .... Is it necessary to connect both the Vcc & JDVcc??!
karar sabih yes
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?
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.
it dims because of the cameras compensating for the brightness
Never ever put voltage on the yellow green wire!!
i didnt get this you say don t use yellow and green but yourself use that one ! i live in turkey and which color i should connect to relay if i use an extension cable like yours?
+georghe hagi (Ottomans) Kahverengiyi kullanmalısın.
+nfsking2000 teşekkür ettim
+nfsking2000 mavi olsa ne olur mesela? Yani maviyle kahverengi farkı ne
georghe hagi
Mavi de olur önemli olan devreyi kapatmak. Kahverengi tesisattan kullanıcıya gidiş, açık mavi dönüş diye düşünebilirsin. Ama sarı yeşil topraklama olduğu için onu kullanmamak lazım güvenlik açısından.
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)?
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
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
why do you need a second diode after the optocoupler if the coupler contains a diode of its own
Thanks for this video! It helped me a lot with my project.
Hello,
Thnx a lot for your great RUclips, 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
sir for a single channel relay , there is no JDVcc . There are only three pins for vcc , In, and gnd . What should I do now. Please reply.
JDVcc is the same as Vcc
Would I still have the the benif of the isolation if I'm using the same AC-DC power supply to power my arduino ?
Hi. Love the video. Excellent explanation. But I am confused as to why you did not connect the ground on the arduino to the ground of the relay (the one to the right). Referring to @3:51
+Dejan Nedelkovski Okay. Thanks. Yeah. Understood.
I take it that the issue with the separate power for the relay is that if there is a short inside the relay, power from whatever device is connected will go shooting up the 5v line into the Arduino and kaboom: smoke and melted plastic. If this is right, what are the chances of it happening and could you put an appropriate diode on the line to stop it? I am a bit of a newbie so sorry if this is a dumb question.
+Dejan Nedelkovski Thank you, thought I would ask!
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.
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 ! ?
no
Also for this application, if there is a short circuit on the lamp, does it cut out?
if i want to create a finished product, i cant give separate power supply to micro controller and relay, then what will be the solution for that ?
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 :)
hi, i need to connect 6 relays, how should i connect the 5v from the arduino to the relay board?
Nice Tutorials bro. Explained in detailed. Awsome :)
There is one part I don't get. If the Arduino isn't sharing a ground with the relay circuit, how is the signal passing through. My circuit skills are a little rough, so I didn't quite get it.
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 😁
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
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?
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?
Yellow-Green is PE wire.
even if the micro-controller is connected in parallel with the 5v power supply will it still be in danger from the relay ?
is the yellow wire for the voltage?
It was better if you could give values for R1, R2, D1 and T1. May you give these?
it is a module
hi
how can i controll speed fan220v with lm35
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
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?
The code giving compilation error...'in1' was not declared in this scope
I dont find the gnd for the VCC- only VCC and jVCC? Where is it? HW-316 relay...
how to connect the adapter to the jdvcc and ground of the relay?
Hello thanks for the video how to control the light using online terminal ? I don't want to use the delay
wow many thanks for the schematic! but it doesn't work without the jumper. It is killing me!
One question tho , Should i connect the blue wire to the relay
Couldn't we just connect Vcc and JDVcc and put diode before microC ?
Which of the two wires in the cord do I connect to the relay?
Which relay is used in it ?
5v 10 Ampere
Or
12v 10 Ampere
you seem confused as relay voltage and contact rating
does the relay need a separate power source
i m using this relay module for home automation project using IOIO OTG but this relay module is operatin by giving grnd of ioio to chnl 1 or chnl 2 WHY ??
Hey will the vcc from relay power the arduino
how did you get the light to dim with a on/off relay. Sorry I'm a complete noob lol
Its only camera compensating brightness.
checkout on MOSFET transistor
Very well explained. Thank you very much!
I have only Two way channel in my switch board. How can i connect + / - wires in this case? Please help
i have one more question. can i connect a 12v adapter to JDVCC? i have that one for now
Is there any way to power the arduino with 5v without using the usb cable? Because i want to fix it outdoor and I don't need to exchange batteries every period of time. I hope get the answer.. So many thanks
Dejan Nedelkovski could you please show me how? Any RUclips link may help. Thank you so much
Nice video! please, could you tell me what is the cad software used for your line diagram of the relay ?
What use the transistor has , emitor to Gnd?
Can arduino uno controlling 20-channel relay? please give me the scheme if it could
great job sir...!!! this video is really helpfulll for my project......thanks sir...
can I give 6 to 7 volts to relay module with adapter....is it harmful fo ckt?
Lovely for concept clearing.