Easy-to-build Remote-Controlled Door Lock

Build a remote-controlled door lock from readily available low-cost wireless relay modules and car spare parts. Building this lock does not require any programming or special tools like a soldering iron, and anyone capable of holding a screwdriver will be able to build one.
Contents
0:00 Intro
0:12 Remote controlled door lock
1:28 Use car parts
2:18 Add a remote control
3:01 The circuit
4:37 Power supply
5:21 Summarizing
5:49 Thank you for watching
Resources
- Arduino sketch for servo-controlled bolt: github.com/ClemensAtElektor/a...
- This project at Elektor Labs: www.elektormagazine.com/labs/...
Check out our TH-cam offers: www.elektor.com/youtube
Subscribe to our Newsletter: www.elektormagazine.com/pages...

[@PhG1961]

Voor mij is deze video een heerlijke 'trip down memory lane'. Ong. 40 jaar geleden heb ik een dergelijk elektrisch slot gemaakt om mijn workshop mee te vergrendelen. Het moest oerdegelijk zijn en vandal proof... Na verschillende succesvolle tests was de tijd rijp om voor de vrienden een demo te geven en te genieten van mijn 'moment de gloire'. Na de 2de demo was er plotseling een doffe 'boink' te horen... met als resultaat dat we de deur hebben moeten openbreken. Er kwam nadien heel wat herstelwerk, schilderwerken enz... aan te pas. Tot groot ongenoegen van mijn ouders... met als gevolg dat de elektrische/elektronische sloten op een laag pitje werden gezet.

[@alexuzhernz8633]

pretty simple but nice!, thanks for sharing.

[@ElektorTV]

Thanks for watching!

[@AztecWarrior69]

I just advised another youtuber to do it like you. Saw the link, to your video, on the sidebar (without even watching your video first) and sent it to them. Then I watched the video and it did not disappoint.
I do however have a tip for you. Use a MHCOZY 4CH smart switch. It has all the feature the one you used. I have not research the one you used but I know the MHCOZY has the capability to use WiFi. That will let you be able to use alexa or G.
You could also use a spring latching solenoid, instead of the the actuator. It combines the actuator and the bolt lock into one. Plus many of them have a beveled bolt/rod. So instead of having to reverse the power, it just pulls the rod in, and springs back when power is off. The bevel is so when the door is closed, it allows the door to push the rod out of the way. Once the door clears the rod, the rod spring back and the door is locked. In the MHCOZY, there is a setting (Inching Settings) that lets you set a time. So you press the button and , let's say you set it for 5 seconds, the channel will be on for 5 secs and the turn off. Alternatively, using alexa, it can be timed so that you press the button, it unlocks, waits for a few seconds and then turns the power off.
Even if you use the actuator, the MHCOZY can be set to do this so that it auto locks.

[@AztecWarrior69]

Like this guy using a solenoid like I described. (without even watching your video first)

[@AztecWarrior69]

th-cam.com/video/0wYp7rd4IIo/w-d-xo.html

[@AztecWarrior69]

Forgot to mention that if you us actuator, you will have two extra channels on the MHCOZY. With those two channels you can setup lights on both sides of the door. With the interlock function or a routine, On alexa or G, you can power up the lights with one channel and turn them green or red to indicate if the door is locked or unlock.

[@Manu-el8dk]

is it possible that another person with a normal remote would be able to open the door? iven if they don't have one of the two abcd remotes ?

[@sankyppp]

What switching mode can be used for this project? Does momentary mode keep the switch on for enough time for the actuator to move completely?

[@AdityaMehendale]

Would an implementation with a single relay and a fat series-capacitor work, instead of two relays? The NO and NC would be wired to +12V and 0V, and the pole to the "door-lock", via the capacitor.
Such a scheme would be "inherently safe" in that even if you accidentally kept the button pushed, the coil would de-energize once the capacitor gets charged.
Relays are not necessarily cheaper than elcos, but with fewer moving parts, possibly fewer modes of failure..?

[@ElektorTV]

Of course, all sorts of circuits are possible, and there are many ways to improve this design, but the main objective was to make it accessible to people without electronics skills or knowledge, not requiring "special" parts, tools, and soldering.

[@woolfy02]

Very cool project! To use this with an AC adapter, do you know which one we should purchase? (I live in the US). Besides that, I just have to find a 9V servo door lock? I just want to make sure I have all the right parts. The eMylo relay switch is like $30 so, I'm hoping I can find something similar but not so pricey. (I'm broke most of the time lol)

[@ElektorTV]

The door lock servo used in this video is for cars and therefore works up to 12 V. This means that you can use a 110 VAC to 9 VDC or 12 VDC power adapter.

[@paulparanaque8973]

can I have a schematic diagram for this please

[@ElektorTV]

Sure, you can find all related files on the official Elektor labs project page: www.elektormagazine.com/labs/remote-controlled-door-lock

[@marcjamesalcaraz5072]

How many hours does your battery last??

[@ElektorTV]

Can't say, that depends on the battery you use. In my setup I used a power adapter.

[@TheOnlyDominik]

What happens when the battery is empty?

[@ElektorTV]

Then you replace or recharge them. Or use a wall wart. Note that the idea is that the lock is supposed to be in the room where you are in too. So, if the electronics stop working for some reason , you can always open or close it manually.