How to use 4 channel Arduino Relay Shield (with code)
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- เผยแพร่เมื่อ 27 ธ.ค. 2017
- In this video you will learn how to use 4 channel Arduino Relay Shield (with code)
Download the code for this video:
goo.gl/EkjbLZ
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Tutorial by Robojax.
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I just got my 4 channel shield yesterday, thanks for the video, it explained much. However, even though I trimmed the pins for relay #3 as described, the shield still did not sit far enough down on my Arduino/Genuino Megas 2560. I had to use the Prototype Expansion Board from the Starter Kit to get the relays to work. The explanation of the pins might be helpful when I put this on a board.
Great how to! Thanks for all the (web-site included) information.
you are welcome.
Awesome Video, it helped me a lot, as it is usual with your videos.!! Keep up the good work.!! We really appreciate it.! Greetings from Guatemala.!
Glad to hear that! Please subscribe and share. I appreciate it.
@@robojax I’m already subscribed.!! :)
Thank you very much.
Great video, thanks for posting
Nice presentation. Thank you.
Hi sir I thank you for putting effort to provide this video . appreciate your work
Hi tsbimbra, you are welcome. Thank you for not skipping the ads and keep watching them. This will help me a lot.
thank you very much for this demo !!! permit me one question, if i run 4 dc motors( each with its power supply) would 9v (680mA) battery be enough to run all 4 relays ??? thanks in advance for your video + time !!!
You are welcome. The amount of current depends on how much current your motor consumes. Maximum should be written as 10A and I have shown it. Your motor voltage can be independent of relay module.
thanks on the pin assignments to relay
You are welcome.
Divide the voltage or switch voltage from A to B? I need the 12v to be switched over to the second line.
It took me a while to find out what is A and B. You should have used reply to previous comments.
Your question was related to 8.2V and 16V and that's why I offered solution.
Now 12V. I did not understand what actually want to do. We have got 4 relays which work with 5V from Arduino. What do you want to do?
Thank you. Was wondering what pins were being used.
If you want help it fully, you should see it. The tutorial would be useless if I did not define and use pins. It won’t work.
this is great to turn the relay on/off
I would like to do this in an arcade cabinet with a pir motion sensor,and not with the delay code.
im new to this and not really sure how to edit the code to do this.
so my question to you would be.
Can you provide a code with the pir sensor connected to pin3 which would turn on any one of the 4 relays by walking up to the cabinet,then turning off when no motion is detected.
being new to this is like learning to walk for the first time lol
your help with this code would be appreciated so much..
signed
old dog tryin to learn new tricks
Hi, your project needs multiple components to be put together. You should be able to understand the sensor that detects when cabinet is opened. Then how you will open the door? does it already have motor with component to open/close if not you would have to make that. Then you can put them all together. So
1-Learn how to use the sensor to detect motion. There are lots of ways to do it. One cheap would be ultrasonic sensor sensor to measure the distance. You wold install it inside cabinet and continuously measure the distance up to 180cm. So if obstacle gets closer to the door for example 50cm, you can turn on the motor to open the door.
Here is coupon (expires in 4 days) for my Arduino Course on Udemy where you can learn Arduino step by step: www.udemy.com/course/robojax-arduino/?couponCode=9F68A2CA54235660FB69
@@robojax im not trying to open a door.
its like turning on a lamp using the 4 chn relay shield,stacked on the Arduino uno. with a motion sensor(PIR)
just needed the code for when the pir detects motion..lamp comes on then
no motion lamp goes off.
Great video :)
Thank you. :-)
Excelent!!! Thanks a lot.
You are welcome.
Can the relay sense voltage for On @ 8.2v then Off @ 16.0v then switch to channel 2 ?
The shield can't do that itself. For each channel, you need 2 resistors (with right values) to make voltage divider and connect it the input of each channel. this can be done.
Here is voltage divider bit.ly/v-divider-1 and here is the formula for calculating V out which is your desired voltage. You can calculate R1 and R2 bit.ly/v-divider-2
I hope I understood your question.
Hi, Robojax, I am using the Motor Shield that you have and i was trying power a DC Motor with that and when i Upload the code, the Arduino and relay shield were glitching and the DC Motor was not moving. I checked the hardware to see is if there was any problem and it seemed to be fine. I also checked the code and even tried your sample code but still glitches. Do recommend any check to be done?
Hello, if don't know if you watched the video fully. if not, watch it without skipping. I have explained things about the module so you learn and if your shield is different you can fix it.
Robojax
I have seen the video fully, it was really helpful and we are working for a small project for my son’s project
We used 2 power source, one for Arduino and another for the Relay module common to drive the outputs, thanks for replying
Robojax
After using the two different power sources, the glitching problem was fixed
Hi robojax, currently I am trying to turn on a solenoid valve on and off for testing and nothing is working. I have copied your code and I have watched the video multiple times. I have the same relay Shiels, does it power a 12v solenoid valve ?
Hi, do you hear relay clicks? if not, check code and shield. if you you hear clicks then it should work.
@@robojax I hear clicks, I think I found my problem I’m trying to power a 12v solenoid and I think the relay sheild is 5v, thanks for responding
thanks
I don't know if you notice but the link on your site for Arduino code and video for 4 channel Relay Shield, is incorrectly linked to Arduino code for HC-SR501 Motion Sensor
Thank you for letting me know. The link has been corrected : goo.gl/EkjbLZ
Your very welcome!
Hi Robojax
I am trying to run 12V DC motor with 4 Channel Relay shield. I followed your video and tried connecting the same. I am using Relay 1 and 2 for forward and reverse direction. I am really struggling with this and not able to achieve the same any help would be appreciated. Thanks in advance.
Hi, the. Watch the video 2, 3 or 4 time so you learn it. This is how I do it. I can’t type what I said in the video.
Hey Robojax,
Thanks for your reply. I did not mention on the post that I want to operate my relay using joystick. Is this possible? Even if I connect my joystick and write a program for the same ……Relay operates on it’s own w/o taking input from joystick. Same program works with single relay.
Thanks
What do you put for isolation USB port???
when you connect wire to relay, they are isolated from DC circuit. Other than you can't do anything else.
What about wifi connection? Can i use this shield with arduino wemos r1?
I am not sue about the wemos sorry.
I'm going to buy this one and a Arduino Rev2 WIFI/ Bluetooth, and they will be used in a PC, to turn on, off groups of Led strings. Via WIFI or my smartphone. These are forseen with only Molex connectors, which are too big for building such a system.
I need use 2 of this shield.... It's possible? How's the code this?
no you can't because the pins ca't be changed.
Robojax I’m so sad
don't be. Here is 4 to 8 channel relay you can use th-cam.com/video/Wbm3MCMgM_s/w-d-xo.html
@@robojax Can you cut the pins off 4 5 6 & 7 of the second shield and jumper from other pins to 4 5 6 & 7?
Sorry for not explaining - my goal is to turn on 12v / 1amp light bulb 1 for 30 minutes then Off ; then turn on light bulb 2 for 30 minutes ; then back to light bulb 1 and so on repeating .....
yes you can. this is what relay is for. Each relay can be controlled. I have written code for you here codeshare.io/a3pJAB