Unobtanium over there. You should see how they change light bulbs... (joke)

@@troubleshooter1975 yank the top-plate with the snaps off a dead battery, add wires, presto - reusable clip. Got a multimeter running that way (and has been for years) 'cause I didn't have a clip in the junk-drawer, and didn't feel like making a run to Radio Shack. Used the top of the dead 9v battery that I was changing out (broke the wire off the original clip while trying to pull the battery, and trying to solder it back on melted the plastic the snaps were mounted on so the snap fell off - the one from the battery is some sort of cardboard/fiberboard, so didn't have that problem) with a piece of shrink-tubing, and it's just been going and going for at least 10 years now.

I was thinking this, could you not use a capacitor so it goes of for a few seconds then resets once it has discharged? Otherwise it might be annoying.

Need to wire this to a speaker that send out the sound of a 12ga being chambered. Hearing that right behind the door is an immediate turn and run.

Cameras and dogs in our case. When I can get the right kit for the right price I'll look at a screamer alarm though I want that screamer that forces you to the ground and forces you to defecate yourself once inside so you can be in a nice little bundle awaiting the cops.

Except for when the battery run out!

@@johnmoss7227 simple solution to that as well, use a timer circuit that automatically shuts of the siren after say 60seconds like most household alarms do. My home alarm system shuts off the siren after a 2 minute period, but starts up again about a minute later until the alarm is deactivated or responded to.

Juist make sure you aren't a black guy innocently knocking on the wrong door.

Nah, Gay men still break into straight men apartments Especially ex gay cops 👮‍♂️

Or a sign that says "protected by Smith & Wesson".

@@lighttheoryllc4337 and get two in the chest. One in the head

yeah tell that to the boy who rang the wrong door

Need's to create something like this with a rechargeable air horn that is aimed at the burglar!...once he clean's the 💩 out his pant's when he get's home, he would also realize they are now partially deaf!😅😂

@@robertjenkins5440 GUT LAUGH!!! YES!!! ROFLMFAO!!!

Replace that z44 with a scr or thyristor then it will latch

Кардиостимуляторы.

yes tilt switch

Mercury switch

@@SRelectric Won't work when burglar bypasses the handle with crowbar..

@@TheSimoc True, if it's locked, the handle probably is not going to move...

Many places used to be that way. Stay tuned. You may be in for a surprise.

My neighbour hasn't locked his house door for 19 years. He knows it's 19 years ago because that's when he lost the key.

Biden has the borders open, so it won't be long now before you lock your door and have a loaded gun next to you.

Конденсатор накопитель.

Уборшик конвульсими вызваного сердечного приступа.

И тогда вас будет ждать невероятно длинный отпуск где все включенно даже одежду яркую выдадут а возможно даже дадут поучаствовать в фейрическом атракционе(если вы живёте там где смертная казнь по средством электрического стула это законная процедура по отнощению к массовым убийцам) ну либо так усыпят как бещенную собаку инйекцией.

Ротвейлерам не нужно жить в обществе толерантом криминалным актам и финасовых преступлений оставьте ваши страхи автоматике(а красоту вашего зверя можно увидить на канале Луны. У меня вот тоже три котёнко выросло во время пандемии.

А электрический стул для убийц случайных прохожих ещё применяется.

Термоизоляция.

I can promise as soon as TSA see's a home made electronic device in your bag with wires hanging off it. They are going to immediately call a LEO and have you detained for questioning. You will miss your flight, and depending on how you behave and how receptive LE is. They could put you on the no fly list. The first things they are going to ask is what is this device?, Why did you make it?, and what was your purpose in using it. Expect to be detained for a couple of hours at least, and to have your device confiscated. Don't take my word for it. Just try it. Personally I wouldn't do anything that might put me on the no fly list.

​@@rickhunt3183 ... Then in that case (pun), I would be upfront & probably tell them (TSA, boarding, attendants, etc) about it. However, if you have normal electronic devices in your cases, such as cameras, ipods, electric shavers, watches, flashlights, radios & whatever, I'm sure you can also mount up a nice looking box for that motion alarm as well, so it does not look like some strange-looking device on an x-ray. And when they realize what it is & it becomes more accepted over time, perhaps airport culture can change for the better, including personal security. Of course, this does not excuse anyone not to hold on tightly to their stuff at the airport or on the streets, although it does help overall to continue strongly teaching morals, respect & ethics to kids first at home & school,for a better society.

@@robwebnoid5763 Everyday people are testing TSA security. Cheese going through the X-ray machine looks just like plastic explosives. People will take a laptop and removed the batteries and fill the battery compartment with cheese and wires to see if it can get past security. Lots of everyday things are loaded with electronics. Camera lenses have lots of electrical components inside and on x-ray you don't know what it is. That alarm in the video was very simplistic and crude. I'd recommend using an AM312 to detect people and a gy-512 3 axis accelerometer and esp-8266 microcontroller to detect a package or container has moved.The 8266 will give you the ability to be notified remotely. of course you could use other microcontrollers. A raspberry pi pico with wifi would be an excellent choice also. I hope you have a great night.

​@@rickhunt3183 ​ ... Yes, of course you can also use those things, but if it was not for the ingenuity of the minds, none of those things you listed would have come into concept & fruition, as those things also started off with the same simple design needs & wants. Something as simple & very cheap as the above homemade motion alarm is part of that technological & necessitative nature & progress. It may not sit well today with some pushing better matured, more complex &/or patented devices, but keep pushing such inventions & they too will eventually become a part of that list you mentioned & perhaps evolve into another alternative consumer item. Apart from its usage nature, this could also help some viewers start off into electronics & then perhaps those people will eventually get into the more involved circuits such as you mentioned. Curiosity first. "Hey look, my first electronic circuit, thanks to this youtube channel." The more the merrier, of both new devices & new engineers/techs/hobbyists. I remember perusing through old electronics magazines & people sending in simple circuits with low parts counts that can do simple jobs. Plus, the point here with this simple alarm is not to trick good people, but to trick the bad, whether at the airport or at home. Have a good night too.

Not in series; that will do the opposite! 1) It would still stop the instant the switch opens, 2) It will actually LIMIT how long it will sound while the switch is closed, 3) It will not reset, unless some sort of discharge circuitry is added... [It will not sound twice/again] You need to put a cap from the 'gate' side of the switch to the ground (neg). [across the 1M and 'lower' 1K resistors]. Coincidentally, it works out aproximately, that the value in µF works out to be how many seconds the alarm will sound, after the switch opens again... e.g. A 3.3µF will sound ~3 seconds after the switch is reset... This will depend on the turn-on voltage of the FET you use (which I did not look up). Also, you 'may' need a heatsink, as the slow turn off will heat the FET, depending on siren current and FET ratings (unless you add some additional fast turn off circuitry). Mr K L

Take a snapshot of the diagram, take it to your local electrical/electronic store to have them give you all the pieces, buy a cheap soldering iron, a small roll of solder (preferably with flux in it), and then play this video at 1/2 or 1/4 speed and follow along; simple as that. Back in the good 'ol days of Radio Shack, these projects were a dime a dozen and people there were more than glad to help.

@@larrycox6614 Thanks! 👍

Тут уже спрашивали - убийство случайных прохожих уголовно накозуемо и не имеет смысла.

Ha. Reminds me of old west Tombstone headstone : '' Here lies Les Moore, Died from 4 shots from a .44 No Less No More "

АЕК

Simplest way to do that is replace the FET with an SCR (and adjust the resistors appropriately). A momentary open switch in the alarm or battery path then resets it...

Датчик хола, фото реле... Сухой лёд.

Если это не военное, гражданское преступление которое повлечёт за собой уголовное наказание либо... От калитки точно мало что останется а фанерную халупу просто сдует, кирпичная хибара осыпется на негостеприимного владелца.

Ну в России (где интернет весма доступен и YT ползовался популярностью) теперь пользователи YT не могут пользоватся рекламмой поддержкой.

7555 would make it better. But it may drain the battery in a day.

@@caseymuni4097 "It may drain the battery in a day", didn't you work it out to check before you commented? Assuming an alkaline 9V battery with a typical capacity of 600mAH, supplying a 7555 which has a quiescent current consumption of 60uA, this would suggest close to 10k hours of standby. That's more than a year. Throw in a well designed trigger circuit, and depending on how often it goes into alarm, the working life of the battery would still seem viable to me, especially as it makes the device truly portable. Battery power is what CMOS devices were invented for.

@@MarkDaleADV You forgot the buzzer @25mA: 600mAH/25mA=24Hrs

@@caseymuni4097 That's the purpose of using the timer, if the handle is operated, if only for a moment, the alarm sounds for say 30 secs and then stops. It wouldn't make sense to put a burglar alarm on a door that was in constant use. Best to look at it from the point of view that with that setup (30 secs), it could go off 2880 times on one battery. Anyway, look up a design, evaluate it for your own purposes,and decide whether it'll do the job, or modify it so it does what you want. I'm finished here.

@@MarkDaleADV " it MAY drain the battery in a day" comment is an accurate statement and no reason to be nasty.

Всего лиш транзистор.

Зумер.

Скорость о.25

There is a settings button on the video, and you can change the playback speed (it even 'normalizes' the speech pitch!). On desktop; I don't know about cell phone (I would think it is there also...). You can increase the resolution too, for those times you need a clear image of details...

1:59

it's at 1:58, if you watched it (can they edit the video once posted? it is there now...) He does not indicate what the 'vibration sensor' part is though...

@@troubleshooter1975 жидкий метал либо шарик в инертной среде. Датчик хола.

@@JIUNnF It is definitely NOT a hall sensor, or reed switch; there is no magnet involved here in his video. It could be a mercury switch, or some sort of tilt switch. It seemed to be the tilting, and not jiggling that closed the contacts... Of course, any of those would work or any switch that closes if someone comes in... [even a clothespin wired with something that pulls out of the jaws and closes the wires].

@@troubleshooter1975 it's a tilt sensor, there's a ball bearing inside that rolls to the two pins when tilted to complete the circuit

You can modify this circuit to do that, sort of... 1) Put your switch across the 1MΩ resistor. This will trigger on switch opening. [move the switch and connect the two 1KΩ resistors, except you are going to change the value of one as described next]: 2) But now standby (armed) current will be ~18mA, and will drain the battery in ~33hrs. So you will need to change the 'lower' 1K resistor to maybe 470KΩ [between switch position here and the 1MΩ resistor]. It will depend on the FET specs. Whatever highest value still triggers the FET. [if you can't calculate this, find the highest value that still triggers it, and subtract maybe 10% or so, such that it will still trigger as the battery depletes and drops that much in voltage..] There are much better ways to do these trigger circuits; i.e. many comments for using a 555 IC [55 cents ea] to replace this whole circuit, or to switch the FET directly, as desired... Mr K L

Why not.unless all thieves scared away permanently

Oh, found it, 0:12, That was a wire (edit cuts obscured what he was holding)