Relays...How Do They Work?

Relays, gate openers, door strikes - integrating these into your infrastructure gives you some powerful functionality and security - but how do they work exactly? This video gives you a simple example of how to wire up a relay to an electronic door strike from a non-electrician.
Chris Sherwood with Crosstalk Solutions is available for best practice network, WiFi, VoIP, and PBX consulting services. Visit CrosstalkSolutions.com for details.
Crosstalk Solutions is an authorized FreePBX and Sangoma partner and reseller.
Connect with Chris:
Twitter: @CrosstalkSol
LinkedIn: goo.gl/j2Ucgg
KZbin: goo.gl/g4G58M

[@chrisdestroy]

Chris, you are the Man!... Thank you for allowing me to add 'Relays' to my DIY skill set.

[@JustaSimplefact]

NO and NC is referring to the circuit, not the lock. NO strikes remain locked until their circuit is closed. NC is more common for magnetic locks, since their circuit is constantly powered (closed) in order to keep the electromagnet engaged.

[@vettepurr]

Excellent Video!! Thank you! Helped me with a doorphone I am setting up at work.

[@hhernandeza06]

Great video on home automation Chris! Basic concepts of relays, it took me back to my college years when I build a lot of that stuff in the lab. Are you going to do more videos like this for home automation? Enjoy your vacation!, you deserved Cheers to that! 🍺🍺🍺🍺🍺🍺

[@CrosstalkSolutions]

+Hugo Hernandez thanks Hugo! Hopefully more videos on this type of stuff coming soon.

[@Mw2SnipeEm]

Really good video! Thanks! Suggestion for video: integrate ubiqitui with facebook wifi with for example spotipo. Keep it up!

[@erickrodriguessp]

Can I leave a "Like" twice? No? Oh... that'ts too bad... this is a great video!!! Thank you Chris!!!

[@SirMilad]

I am looking a simple door phone with a normal sound like video door phones. which model do you suggest?

[@EricGoodrich]

Hey Chris! Thanks again for all your videos. If you are going to do more videos on the white board (Please do), please consider getting a good Lavalier Microphone. 🤓

[@CrosstalkSolutions]

+Eric Goodrich Yup...it's on my list of stuff I need to buy!

[@alanhaase7165]

Could you please please please do one for the Axis A8004-VE? I am struggling with it and would prefer to use the 12v output it supplies rather than having to plug anything in as the whole point of getting the A8004-VE is to take advantage of PoE

[@yusuflimz]

Quite like the new intro!

[@wildabdat]

no BS, thanks for the video man!

[@johnkistner9131]

Is there a certain brand you are using in your video example - for the magnetic door strike ?

[@mohammedsameal-awad1682]

Hello Criss, when you are going to continue the free pbx series?

[@CrosstalkSolutions]

Soon!

[@vespinonl]

Great video, but my question of couse is how to integrate it in freepbx?

[@brettlovell4855]

Through the PoE/Network Cable, You setup the SIP Extension, and thru a GUI you tell it what extension to ring when the button is pressed, it calls that extension, allowing you to talk to the device. When you press 9 or what ever DTMF tone it will unlock the door.

[@CrosstalkSolutions]

Yup - as Brett said - it's just a SIP extension in FreePBX.

[@techwhizard]

You could just use the 350mA that Axis 8105-E relay output is capable of to also power the strike lock rather than plugging strike lock to a dedicated power supply. The length from Axis to strike lock will also be short specially if both are connected to same door so very low voltage drop if any

[@Bossanova_]

Hello! Can you tell me how? I’m thinking about it right now.

[@hinachow1]

You just help me figure out why my strike wasn't working with my Dahua system!

[@peterg.8245]

Title and content don't really match, was expecting a more technical video ala BigClive or EEVBlog. Still it was interesting to see an implementation although it doesn't seem very secure since it could be overridden with a few 9V batteries and access to the wires.

[@brymoTube]

If someone unscrews my intercom wont the be able to connect the wires and unlock my door? I dont understand how to physically protect my intercom from an attacker.

[@kenfla82]

You wouldn't need to splice any cable. Just run your positive from the PSU to the relay common and have it return via the NC to the lock.

[@gelno55]

Funhaus unite!

[@leopoldsaroyan927]

howwww yeh relaaaaaaaaay !

[@JB007Rules2]

It would appear that you have a Tungsten ring on. I didn't read all of the other comments because I don't have time but I was working with low voltage stuff and some 12 volt batteries and I highly do not recommend having a Tungsten or any metal conducting ring on your finger when you are working with live electricity in any circumstance. Trust me when I say this

[@Jared01]

DC Voltage is always Positive / Negative. AC is Line and Neutral / Common / Ground.

[@srokalapy]

AC its not always Line and neutral. Line and neutral only happens when you have electrical service which is AC power. But if you have 24 v AC for HVAC system then we have T and C. Or if you have 240V in american system you have phase 1 and phase 2.

[@binaryglitch64]

Think hard about NC vs NO... you'd hate to be locked in an NC room during a fire... you'd hate to be being attacked by a movie trope style killer, locking yourself inside for safety and realizing he just cut the power ... Sometimes fire code doesn't give you a legal option to choose NC ... that's why you can switch some of them.