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Has anybody here used a simple door alarm?

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dasherHampton

Platinum Member
I have a friend who lives in a not so great part of Atlanta. They're living paycheck to paycheck as it is and they don't want to get a complicated alarm with a monthly subscription.

I was thinking that they could buy a simple local alarm that can be installed on their apartment door. Does anyone have experience with something like this? I know there are alarms you can hang on the door handle but I wouldn't want them to have something so sensitive that it goes off when a strong wind hits the door and shakes the alarm. That would probably be annoying.

Maybe something exists that you can easily install on the door and adjoining wall that goes off if the connection is broken? Something battery operated that a person can just set every night before they go to bed?

Thanks.
 
lol no, the dogs won't work in a small apartment that contains a cat.

There are hundreds of alarms out there. I guess my hope was that someone here has used one they found good.
 
Push-pull controller driving 2 big mosfets, hooked up to a centre tapped step up transformer, with one lead going to ground and the other to the door knob. Try to get at least 1:100 turns ratio but the more the better. The higher frequency you can tune it the higher the primary voltage can be without requiring too many primary turns.

You will get an audio visual alert every time someone touches the door knob. The lights will dim, and you'll hear yelling. You might also smell ozone, so this even takes care of the corona!

On serious note though, you could just put a bell or something like some stores do.
 
Come on, man.

A little bell isn't going to deter a group of thieves looking to quickly ransack an apartment, or even worse a person looking to harm the occupant. You need something loud enough to wake up half the complex.
 
Lock the door? The sound of them breaking it is going to be loud enough so you can hear it. From sound of post I thought you just needed to know if someone is coming in when you're home.

If you're trying to wake up the whole complex then replace bell with one of those bear alarms you carry in the bush. Just set it up so if the door opens it activates it.
 
dasherHampton said:
Come on, man.

A little bell isn't going to deter a group of thieves looking to quickly ransack an apartment, or even worse a person looking to harm the occupant. You need something loud enough to wake up half the complex.
Click to expand...
Don't be scared old person. How many forced entries have happened in that complex. I'm gonna bet on zero.
 
 
dasherHampton said:
Come on, man.

A little bell isn't going to deter a group of thieves looking to quickly ransack an apartment, or even worse a person looking to harm the occupant. You need something loud enough to wake up half the complex.
Click to expand...
No offense but you are horribly horribly ignorant and that's the main problem here, not physical security.
There's a whole bunch of stuff you need to know about the world and crime and people in general. I don't have time to list everything here. Mostly you need to understand that NO alarm is a deterrent. It just makes people rethink their actions. A person determined to hurt you isn't going to stop for "something loud enough to wake up half the complex". It just moderately improves the response times of witnesses.
Get a proper security system from Ring or whatever and help them install it. After that, start reading articles from police and security experts about just how vulnerable most Americans truly are, then accept you cant actually control very much in this world and that's simply the way things are.
 
I remember back in the early 1970's my father bought this heating element that you hung on the doorknob to heat it up. I remember thinking of what kind of moron comes up with such a risky thing, if not from setting the place on fire to burning the kids in the home that didn't know better.
 
BarkingGhostar said:
I remember back in the early 1970's my father bought this heating element that you hung on the doorknob to heat it up. I remember thinking of what kind of moron comes up with such a risky thing, if not from setting the place on fire to burning the kids in the home that didn't know better.
Click to expand...

Wait I did not realize that was actually a thing. I remember seeing that in Home Alone.
 
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