How to use 5V Relay with Arduino to turn ON and OFF AC bulb or DC load

37 comentarios

1. Thank you for posting this. I would love to see a follow up video with the Arduino controlling a relay based on input to the Arduino. In other words if I press one button the relay would be activated for one second. If I press a second button the relay would be activated for 10 seconds and if I press a third button the relay would stay activated unless a separate signal told Relay to shut off.

   I am trying to control an AC motor that will raise a platform to various heights.

2. Thank you, I used this exact method to upgrade my laser cutter to automatically activate my air assist pump during a cut when activated in the cutting software so much cheaper to build a relay control box than spend £260 on a kit for the same thing!

3. Can this be used to power Arduino Nano? I plan to put my project near electrical outlet but not sure how to get electricity from 220v to 5v

4. What are you connecting to Arduino in ac side relay is it neutral common

5. Tech YouTubers be like:

   “Today we’re gonna build a switch”

6. Nice, but I didn't see the push button in the video illustration you mention in the code.

7. how about if i want it to turn on from 6PM to 6AM then turn off from 6AM to 6PM?

8. thanks for the helpful tutorial!

9. Nice video, thanks for sharing it 🙂

10. I really appreciate these videos.

11. Very helpful, thanks for the video!

12. which wire from the bulb is connected to the relay and how did you find positive and negative?

13. does the relay power the arduino, or does the arduino need to be connected to a USB cable while the circuit is being used?

14. Hi , very new to to your You Tube, thanks Robojax. Thank you for this video.Using a Arduino Mega 2560 what is the maximum delay in seconds I can have. I want to turn a 5v pump on every 24 hours for a few minutes.

15. My relay is not switching it is not getting power from the Arduino. What could be the cause?

16. Good explanation without a drip feed, fluff, obfuscation or ego tripping! 😀👍

17. nice

18. What is the minimum voltage requirement for the S pin of relay
    Can we connect the S pin with 3.3v or less

19. Do you connect ground or power to relay output?

20. Greetings sir, I hope you are doing well. It is requested to answer whether or not a 220-240Vac bulb can be driven using a 5v relay using arduino uno? I have a project in which i am doing a bluetooth controlled smart home automation. It is requested to give me tips on how to do it.
    Regards

21. Does the switchside need to be connected for me to test the relay? I am currently using a pi and it is not working regardless of what i do

22. Well no its not quite clear coz these do work been using for ages. when orange light is on that means its pushing out power its not going to drop off till the top green light comes on. red is always on.
    The more you boost voltage you loose ability to push out big amps nomatter what you set it at. e.g 12v 15a power supply boost to 67v your going get around 1a output. want more amps start with higher voltage. It is fairly straight foward

23. please answer asap, how can i long the light on ? your videoa are very nice and helpful

24. I don't understand this module it's got six connections but there's only 5 pins this is what's screwing me up

25. is there a way to stop the relay pulsing on on power up? As in the video my relay briefly pulses on when power applied. I want to use my relay to send signal to open a gate but if everytime there is a power interruption the gate would open on power up not really ideal.

26. is it okay if its lower? for example 12v 300mA

27. Great explanation!

28. Don't use this module to drive mains powered equipment. The isolation between the 5V side and the power side is completely inadequate, and the low voltage side could become live.

29. Can i control 500w dc motor using this relay

30. What voltage is the signal? Can it be 1vdc, can it be a tone? What makes up the signal?

31. Simple and concise explanation, best I've seen

32. Did 5V relay can light up 12VDC lamp ?

33. Can you do please, the same example with millis??

34. I want to power a 5v motor with a relay, is that possible?

35. in the void setup setup code you didnt set your relay HIGH. now when you plug in your arduino it goint to blip on the relay before code runs

36. Hi, thanks for your work!. This seems to be the way I want to work with a washing machine motor, BUT; I need the ON signal to be for one second, then off 2 seconds, then on again 1 second, alternating between 2 different pins. I suppose this is possible but I wanted to check for feedback before I go and burn things. Any help appreciated!

37. Can I power an ac bulb with dc source?

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