Iv ben looking for a hidden lock as well. This is an interesting thread. I have to say.
I like the strikes but some people just don't want to pay for those even though they do have them on amazon for like $30 and other sites for like $15.
I know my question about them is. Do these strikes stay out until electrical current is passed threw them allowing them to open. If this is the case. I will buy on right now.
wasn't really sure how they worked. I need a lock for my attic where my new grow room is being built. I need something not so obvious. These seem like a good option and so does the magnetic solution as well.
I was thinking of using a servo from an old RC car we have here at the house. Wasnt sure if I wanted to use the motor and use the forward and backward motor (as the motor would have more power then the steering servos) or if i should use the steering servos to open and close the lock. 6v power pack and a few extra wires and you could wire the inside of the door and just have it push and pull a pin taht is strong enough to handle a push and pulls from time to time. 3" steel rod or even some re-bar with 2 holding frames would do the trick.
I think I may try this as I have a bunch of remote control cars around. Plus side would be the door lock would be full remote control. no buttons someone can find kinda like a key fob if you wanted to built your own control.
The way I see if it doesnt have to be entirely strong just strong enough to handle someone trying to open a door until they relize its locked or stuck.
Dont know just throwing around ideas.
But I am going to play around with the RC car idea. If everything aligned correctly I dont see how it wouldnt have enough power to lock and unlock the door. Plus you would already have evreything you needed. remote circuit, remote,motor or servo. All main parts are threre. Hell they even sell RC cars now at the dollar generals and family dollars if you have them in your area.
Ill work on this idea and little and see what I can come up with.