DIY Smart Switch - Part 1 how to use a relay
ฝัง
- เผยแพร่เมื่อ 13 พ.ค. 2017
- In this video series I'm going to show you how to get started in home automation with a simple project that will allow you to control your lights and other devices in your house.
One popular home automation project that many people start with is controlling their lights. There is a great satisfaction that comes from being able to control a light using your own electronics and code. However a major roadblock for many people is the realization that they have to work with mains voltage which can be dangerous if you don't know what your doing. In reality learning how to safely work with the high voltage an high current electricity in your house is not as difficult as you may think. If you aren't comfortable with how the electricity in your house works, I encourage you to spend a few minutes researching the topic on the internet. Make sure you are getting your information from reputable sources. In a future video I'll show you how to control lights and appliances in your house without having to mess with high voltage electricity. It's a pretty neat little trick and I'm excited to share it with you.
There are several ways you could tackle the problem of controlling a light in your house. The first, and definitely most popular approach to this problem is using a relay to switch the voltage on and off. The lights in your house are connected to a mechanical switch on the wall that you have to toggle on/off with your hand. A relay does the same thing as the switch on the wall, except that instead of toggling the switch on/off with your hand, you can do it with low voltage and low current electricity. You can buy relays from places like Amazon, eBay, Adafruit, or sparkfun. If you don't mind waiting a few weeks, eBay is by far the cheapest place to get them. I recommend getting one that's soldered to a breakout board. You can get them with single relays, or some come with 2, 4 and even 8 channels of relays. I'm going to use this board with 2 relays, even though I'm only going to be using one of the channels. - วิทยาศาสตร์และเทคโนโลยี
Huge thanks to my *channel members* who make these videos possible. If you want to support what I do and get access to free project files, an awesome discord community, and much more, head over to *www.patreon.com/bytesizedengineering* or click the *join* button here on TH-cam.
Just one issue, as seen at @4:35 those black wire leads have too much insulation removed, either not in far enough or need trimming so that bare copper is not exposed.
Thank you so much. There are a ton of videos, when you search for pi relay, that cover the "connecting it to the pi and writing code to control it" angle, but this (after tons of searching) is the first one that actually covered the other side of things.
I saw about 5 videos on TH-cam about relays and understood nothing! But, this video helped me understand relays completely! It's so easy for me now! Thanks for all the info!
The Reviewologists should have watched greatscott’s video
Exactly!
Watch this then : th-cam.com/video/uniaiJmSch0/w-d-xo.html
Thank you, I was looking for information on how to connect the AC side of the relay, and you covered it perfectly.
Everyone on TH-cam talked about "the signal". I kept thinking it was 5V+, which of course didn't work at all. THANK YOU for the minor detail about it being COMMON or GROUND! NOW MY CIRCUIT WORKS!!!! Thanks again. Now subscribed and I will be back.
Thank you! I’ve just found your Chanel and I’m ready to learn more from you.
I love the way you explained everything. The cameras were perfect. If you ever have time to do the same with your auto switch, that would be awesome.
Very organized and well-presented information. Very useful. Great job!
Great video! How do you make the 5-volt source in your box?
Awesome video man. Thank you so much. Taking your time to explain to this level of detail is highly appreciated.
Thank you! And Thank you for taking the time to comment!
@@bytesizedengineering Can I control load of max 15 amps under 12 volt DC as along as it maintains the same output power rating?? Example Say, 20 Amp, under 12 v dc, power 240 watt as against the rated 10 Amp X 24 v of same 240 watt, or 15 amp, 12 volt....!!??? I'm really confused with these power and current. Awaiting clear concept. Thanks.
Good explanation, easy to understand. Thanks
Well done!! Excellent easy explanation, was looking forever for a simple explanation of using the SRD-05VDC-SL-C 1 relay module with a push button without arduino, was finally able to understand the input connection of the relay thanks to your explanation and video, thank you!!
A really good video here. Very clear and easy to understand.
Thanks +Antonia Warren
Clear to understand. Great compared with many others.
So humble... "I'm not claiming to be an expert in this topic [...] but I did work as an electritian and I do have a degree in electrical engineering". Dude, you're a PRO... lol
Victor Fernandez did
He's not very professional for being a pro he has stripped way too much wire going into the relay leaving high voltage exposed ...
Being a electrical engineer and a electrician are different fields. Smart people though
Thanks for the video. I have an emylo relay, but I was afraid to hook up 120v to the small terminals. I'm good to go now. Thanks again!
very detailed info, thasnks a lot! this is what i was searching
Awesome tip and clear tutorial. Thank you.
Very clear explanation! Thank you!
This video helped me clearly to understand about relays. Thank you bro...I like this video.So,Shared,Subscribed&Notifications bell allowed.
Thank you so much! You’re a great teacher wish I could have you for ever question
Thanks for watching! Good luck!
Best explanation found so far. Any good reply would be appreciated for the following questions in regards to connections.
For the load, or black wires, I presume the connections on the module for the current would enter on the NO, and feed the lamp through the COM. Or does it matter?
So to properly connect the active magnet, I would presume COM would connect to DC-, while NO would go to IN on the module.
I already connected 12V LED lights using relays and now trying to use this different type of relay for a closet light triggered by magnets.
In the 12V schematics for LED strips, the NO on the module loops back to DC-, which becomes impossible with 120 volts.
As for the exposed wires. If they would touch, then the module would be defeated and the lamp would stay on. The issue is that if they barely touch, arcing could happen and this is considered a very serious issue.
Great explanation and also showing.. well done
This video is probably the best explanation you can find on TH-cam. Clear and straight forward. Million likes!!
Thank you! That means a lot! I appreciate your feedback!
@@bytesizedengineering is it possible to connect the two relays in such a way that when powered the Normally open will close and the other one will open which is normally closed? What I am saying let us suppose we have two power connected to two relays from two different sources, How can they be connected or wired in such a way if possible that when one power is on the other one is off? Think about it , seems a good project if it can be done?
“wire nuts” -> marrettes. Also the live wire and the neutral were really close together attached to the relay. Use heat-shrink tubing as a best practice.
ME? - I JUST USE GUM!!! :P
maybe do it properly with wire bootlaces. The way you have shown is just not safe.
It’s 2 years later. Your video was well done. And you could have complicated matters by following my advice. But keeping it simple was the right direction.
great vid.. easy to understand
Hi! What is the circuit already connected to the board in minute 5:00? and You mentioned that do no t connect to a fridge or vacuum cleaner, but can I connect it to my automatic door motor?
Will this same process work to turn off a dehumidifier should a little giant condensation pump fail? I’m assuming a larger relay would be needed, but the process would be the same?
Thank you for your video
I have one qustion please
why you didn't connected the signal to the positive 5 volt?
Fantastic! Thank you
THX, just working with a 2 realy module and I was doing something wrong, you told me what :D
The world's best teacher
That is way too generous, but thank you
Nice, I love it i can really understand Thank You! I will sure subscribe
God I love the outdoor scenes haha. Thanks for making an awesome video
Yeah, I get tired of filming indoors. I think it's more interesting to watch a video shot in different places. Thanks for watching!
Good video, very informative!
Brecht Dhuyvetters thanks! I appreciate your feedback!
Very useful
D video is amzing and very informative..
And easy to understand
Well done brotha!👍👌
Thanks for watching!
At 4:40; how does one wire the relay module (control side,) like I would with a 5 pin cube relay? I'm working on a car project and just want to shift the relay using a power and ground (like a cube relay pins 85/86.) Is that possible? And if it's not to complicated to explain, how do use the Power Select Jumper on the left side? Thanks in advance.
Would you be willing to share the STL for the enclosure? It looks like exactly what I need after watching your video! Great video btw. Your others are great too.
Very nicely explained
I have 1 of the 5dcv to 110 relays. I'm trying to create a Poe using Bluetooth. I was hoping that my signal lead would come from my BT signal as my connection is made to the BT Device?? Your saying ground is signal. So do you know a a way to make the relay activate from a BT receiver board?
Hello I have a question. I have the sonoff 4ch pro 2 and have connected to my garage door. now I want a back report via a switch on my phone app that is possible.
I can't see if the door is open or closed on my phone
thank you very much. very carefully explanation
I want to control several 12v lighting circuits and I'm looking at multi channel relay boards. They all have only one power input. Does that put all my devices on one power supply, because you could get up to 10 amps pretty quickly!
Awesome video Zach, thanks very much. I need to power a simple electromagnet with 12v and would like to use one of the GPIO pins on my Raspberry Pi to control the relay. Can I use one of the Pi's 3.3v GPIO pins? Also, do I need a diode to protect the microcontroller from voltage backfeed/backpower created by the collapsing magnetic field (when I turn it off)?
Calvin, you are right on track! You absolutely can use the pi for something like this. The relay module you see in this video has back emf voltage protection built in. It has a diode (like you mentioned) as well as an opto-coupler. There are a million tutorials online (adafruit, sparkfun, etc) on this topic. A quick google search should provide what you need. Good luck!
Great video!
Hi, can you not use neutral to the relay for control?
LOL I love your shirt!
Very nice video, helped a lot!
I have a power supply for the DC motor on my Sherline miniature lathe with a relay like this. I overloaded the motor the other day turning some difficult material, and it shut down the power supply.
It happened a couple more times, before I could get finished with the piece, and now the motor doesn't run.
I could hear a relay click when this happened, and thought it was a circuit breaker in the power supply. Now, I have it open, and can't find a circuit breaker. I do find a Songle SRD-05vdc-SL-C relay.
It is obviously not clicking, as it should. I've read about relays with overload protection, but it doesn't appear this is such a relay. Could it still have functioned as an overload? And could it have died in my 'adventures'?
Thanks, for any help. I know enough to get me in over my head, but not enough to dig myself out.
GeoD
the relay has this rating
10a 30vdc 10a
does this rating can apply on dc load too?
Great job... nicely done
Thanks for taking the time to comment!
Good sharing.ty
Great video! Do you have a video on how to use a relay to open/close an electric DC 12V valve? I assume you need a two-channel relay to set the reverse polarity? Thanks again for the video
A solinoid is usually used in irrigation
If you split the signal wire and place them in the twee middle pins. Would that switch both relays at the same time?
Hi
I've got a question when you connect the 2 black wires why don't you use the other port.
And what the other port for
Sorry I'm new to this
Hello , this vedio was very helpful , thank you. However what is the equipment connected to lower end ofyour breadboard?
I think you're asking about the breadboard power supply.
Great video, thanks for sharing. :)
Thanks for watching!
Thanks for the video , please tell which relay should be used for 15amp appliances like gizzer fridge, please give the detailed name of relay,, thank you
I need your help regarding relay. I want to rotate motor one cycle clock wise and one cycle anti clockwise. Yousing 24 volt/4amps adaptor.
Nice!!
This video is ok but your t-shirt is the best!
That was a great video
Question: should i control neutral wire or the live wire with relay?
Hi, what kind of switch can you use for signal? Push button switch works?
Nice video. Can you explain about static relays? I am trying to do Home Automation DIY with Rapbery pi
and relays to turn on off lights with touching my apartment wiring...
+Vamsidhar Mamillapalli have you watched my Sonoff WiFi switch video? When you say static relay, are you referring to a solid state relay? I could possibly do a video on those.
So i ordered the one with 4 relays, connected it to my centralised electric space heater, one is for a water pump and other 3 are for heaters, every heater is 8 KW, i was not sure how powerful these relays out so i used theme to activate and deactiate existing 40KW relays inside the heater, i used the rpi4 1gb bc it has a poe gigabit port, slapped in a 16GB U10 card, i brought the poe enabled gigabit cat6 cable to the heater, tempreture dial was already connected to the main home server, installed Pihole on that pi to and just ordered the case with a fan from aliexpress, i made a quick app (i am a java developer) and voila now i dont need to go down to the basement to turn on or of the heater, although on all of the pcs i have made a small java gui for that, i am planing to make my whole house smart using raspberry pis
Thanks for the vid! How could I use a 5V relay to get dry contact output?
The NC, C, and NO terminals will be dry.
Question for you. I’m trying ontrol a linear actuator so I can just retract the actuator when turned off and then extend the actuator when turned off? I am trying to control a door to open and close. Can I use a relay and can I make it wireless with Alexa or Google? Thanks.
Sounds like a great project, I believe I answered your personal message in my inbox.
Isn’t it possible to just use the relay in the outlet instead of buying an extender and if so isn’t it dangerous that right?
Hey, i have question, can i use this to wire the intercom indoor unit, in order to open the gate of the building?
I wouldn't recommend tampering with property you don't own.
Thank you for your video, you may be able to help me with what I'm looking for: I need some type of relay to turn off my generator when the city power come on, my generator goes off by making a connection in the generator bovine.
Can you or any one please help ?
search for transfer switch
I really wonder if it replace 110acv with 12dcv battery then is it possible to control 12volt electronic devices?
Could you tell me if there is a "touch activated" relay available? I'm talking like a bug touching it. It's something fairly unique I am inventing and can't seem to find something like this. Great video also! I enjoyed watching them.
Look into capacitive touch sensors.
Please share the link in which you electronically activate the relay
Thank you. Exactly what I was going to do to test my design - now I don't have to!
Thanks for watching
Which meater you use ineed link to buy
what was the power rating of the relay? specs please thank you :)
Triacs are another solution to home automation and controlling AC loads
There’s SSR too!
Would a relay work for smaller voltages. If I was needing 12 volts in and a smaller voltage out could I put a resistor for the amount of voltage that I need coming out? Is there an easier way of doing that that or would a relay work? Also how would I go about hooking a toggle switch like a light switch to make it to where if I turn it on or off it turns the device on and off. Any help would be appreciated. Thanks
I'm unclear on what you are trying to do. A little more information would be helpful.
Hey man how can I connect the 8 relay I'm trying to do a christmas light project can you help and nice video too
How did it go at Christmas? Any update?
Great video, cheers mate! Also, 10amps seems *plenty* for a fridge :-)
My 6' tall Bosch fridge is 90W, which at the 220V we have here, and with P=VI, is half an amp.
Yup. Mind you, I can’t see why you would want to turn off the fridge with a switch, sensor, wifi etc 🤔
Nice video! What are those blue caps you use at 3:10?
I call them wire nuts, there might be other names for them elsewhere. They are used to connect two or more wires together. Just make sure you get the right size for the gauge of wire and how many you'll be tying together.
I have a question. Why cut the other two cables if we were going to reconnect them regardless?
If you want to control the power of higher voltage equipment like servers and even lights I like using an Intelligent APC (7800 or 7900) PDU over a network with fence_apc installed on a Linux device. That's for anyone who might actually have a need for that. That way you can use your GPIO pins for things like sensors, etc, etc.
Hey can you help me. I want to make a tv that turns off when people come over to look at it.. Do i use normally closed? Will.it.open when coms? I want it so people in a gallery see a screen with a video feed and come over but a motion sensor turns it off when they are near. Thanks if you can put me on the right tracking without using arduino
That sounds like a cool project! I see that you found my other video showing the PIR motion sensor. I would start with something like that and connect it to the normally closed terminal. Good luck!
Very humble with that t-shirt
Which end of black wires connected to the common and normally open terminal. The one to the wall is normally open and to the lamp is common? Thank you
In this configuration it doesn't really matter. Since the wall wire is the one we're switching, I would connect that to common, and the lamp to normally open. It will work just fine if you have them the other way.
Can you set it to turn on using 5V instead of ground if you change the position of that yellow jumper so that it connects Vcc and Gnd instead of VCC and JDVcc?
You sure can
Really nice T man
I mean T shirt man .....
Thanks
Can I control load of max 15 amps under 12 volt DC as along as it maintains the same output power rating?? Example Say, 20 Amp, under 12 v dc, power 240 watt as against the rated 10 Amp X 24 v of same 240 watt, or 15 amp, 12 volt....!!??? I'm really confused with these power and current. Awaiting clear concept. Thanks.
I would read the datasheet of the relay you have. If you don't have the datasheet find something similar on Digi-Key and read through the datasheet.
Nice video
love the shirt
Hay Love the Channel You have a great way of explaining stuff. You've got a sub hear
I have a video idea for you that would help me and sure others would find Interesting. Home Security using a combo of ir beams, PIR sensors, Sirens and led flood lights and relays that stay closed for a set time so the siren and flood lights stay on if the ir beam is tripped.
Thanks
Glad to hear it! Thanks for the suggestions, and thanks for watching!
what if you have several relays on the same board, how do you manually activate each one?
thank you sir i was able to successfully make a relay switch that powers a space heater and a humidifier.
Glad to hear!
im corrently working on a related project,and i have just one doubt. instead of the breadboard power supply,can i use a 9v battery,if yes how? please respond asap
You can use a different power supply
i have an electronic device that has a 56 volt battery with max of 20 amps. I am trying to add a second battery to the equation so that I can switch between battery 1 and battery 2. i would like the switch to be as small as possible. it could be manual or Bluetooth. any suggestions?
no suggestions, sorry
hi sir, normally the refrigerator draws 6A amps to 9A so will it be safe to use this relay if the device draws maximum of 9A given that relay has a rating of 10A.
That's pushing it too close. They make relays rated for much higher current.
in Indonesia, I use 2 types of wire in a cable which is + and -
but how do I use it if there is 2 (not 3)?