HOW TO INTERFACE 5V 4 CHANNEL RELAY MODULE WITH ARDUINO

Learn how to interface a 5V relay module with Arduino using leds.

Check out other tutorials involving the use of relay modules:

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Recommended components for this DIY
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i). 4 Channel DC 5V Relay Module with Optocoupler for Arduino -
ii) .UNO R3 Board ATmega328P ATMEGA16U2 with USB Cable for Arduino -

For full codes visit this link;

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[SmithOffGrid]

Have the same relay and thought it wasn't working but just didn't realize that it's triggered on LOW. Thanks for the help!

[geektoolkit]

This video is extremely well done, you explained it well, demonstrated it with a nice simple demo, and pointed out that it fires on Low and showed a great technique for that. I really appreciate the work you put into this, and wish I'd watched it before fighting with the relay for 2 hours last night (I was assuming high triggered it and thought I had a signal issue...ugh). Subscribed and will check out the rest of your videos!

[GigDave]

Thanks Bro. Thought my module was shot. Great video, well explained. My project is working like a dream.

[dwyn]

This was a good demonstration and was helpful to me. This made it clearer than many other videos I have watched. Thank you for posting this!

[ericlessard]

Can someone help me? I need to control 4 relay with a 4 axys joystick. On position 1 of the joystick, 3 relay need to be on. On position 2, 2 relay need to be on. On position 3, 2 relay beed to be on. On position 4, one relay need to be on. Those relay will control some hydrolic valve...

[rjsiii]

This is fantastic. Great explanation of exactly what I was looking for

[tommicava]

What resistance did you use in your video? Thanks!!!

[skavelsruhe]

This really helped me with my project! Thanks!

[unclerichard]

I can't get the code to work. Why I try to upload it immediately flags the second line and says "'relay' does not name a type; did you mean 'delay'?"

[ahadshaikh]

Hi nice work I want the led to light up one by one and then inplace of turning off I want it to remain on . What to do plz help

[mahlonkarpaiya]

Good day. I was trying the code you wrote but i cant get it to work. I get stuck on the second line.

[sadiapunni]

the resistors which are used here are they of 1kOhm?

[samuelebasso]

Hi, I have made a similar project with the same relays board. When I power up the Arduino the 4 relays go on and off really fast until the arduino set everything up. There is a code formula to stop it? Or It's because I'm powering the relays board directly from Arduino without the additional power supply? thank you so much!

[reibenedictl.millano]

So that's why I thought the yellow thing was a safety pin and remove it first to work, turns out other way around

[Randy]

What power supply do you have plugged on your Breadboard?