Making of electric door-lock

[currentdensity1]

First of all, my knowledge in electric circuits is narrow (i only know the basics) and if you find technical flaws in my grammar thats because i'm not a native english speaker. I want to make an electric door lock (sort of like the one in amazing spiderman). I was thinking using a small solenoid valve, if it is exposed by a current the plunger is drawn out or is Dc-motor a better choice? I'm thinking about using a wireless transmitter and reciever. Depending on what signal I send, it stops or let the current flow. How do i find these? The main problem is, the battery will run out quite fast, in order for the valve to stay closed, electric current has to continuously be added. I've heard about NC electric strikes, current is not needed to make it stay closed. What do you think? Am i unknowledgeable to succeed ? Appreciating any help.
(So you know, I'm 14)

 

[tpetar]

Electric door lock for car or home or something else?

 

[currentdensity1]

For a home, forgot to note that.

 

[tpetar]

Its smarter to use IR then RF, plus some additional key.

Lets say IR remote send signal to open lock, and iButton deactivate alarm.

 

[currentdensity1]

Is hard to add transmitters and receiver, if it is, i can instead use some kind of component that interrupts the current by pushing it.

 

[tpetar]

You can make single button to enter door lock code.

 

[currentdensity1]

Ok, how do i solve the battery problem. Can i use a small stepper motor ? So i can alter the flow of the current, so the battery doesn't run out so fast. How long can it possible work, without changing the battery. I should use small solenoid valve, because those 12 volts are gigantic.

 

[tpetar]

You can use CNC small power DC motors. Battery should be realiable and enough sized for this job, to ensure opening/closing doot without mains power for some time. Also charger for that battery should exist. Instead of solenoid you can use horizontal bar with some gear and small stepper with "worm transmission" (I think that is right word on english).

 

[currentdensity1]

How is the DC motor connected, it rotates, then i have hook it up in a certain way to make the electric door lock to lock/open. How do i switch the direction of the current to make it lock up.

 

[tpetar]

You can have one taster only, to close-open, or you can have two tasters, with for each state. Usage of some sensor is need to sense state.

 

[currentdensity1]

Taster? sorry.

 

[D.A.(Tony)Stewart]

Magnetic latched Strike is ideal Called Mortice strike

There are other types.

I dont think you can make a reliable one on your own. Unless you have good electrical and mechanical skills. But you can always try to understand what makes a good one.

If not latching type, then unit will fail when battery fails.

 

[currentdensity1]

I saw a similar thread in the forum, a guy linked this website: https://www.societyofrobots.com/actuators_solenoids.shtml. Isn't it easier to use that, than DC-motors and worm transmission. It just seems this is easier to use. If i used this instead of the other model, what would be the flaws.

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I know a lot more now than i did before, i know now what kind of components i need. If i work hard on it, wouldn't i be able to succeed or would it be unreliable.

 

[D.A.(Tony)Stewart]

MOtor is good to lock but what if battery fails>?

 

[currentdensity1]

That the problem with the DC-motor lock, with the solenoid, when the currents stop flowing, the plunger is drawn back.

 

[D.A.(Tony)Stewart]

No.. Magnetic latch operates in both directions like a flip flop.