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Proximity Alarm

12/03/2012 5:51 PM

Ok folks, you all have been a great help in the past. Now I need some help. I need to find a way to take one of those child alarms, the kind you attach one to the child and you keep the other and if the child wanders away it sounds. Well, I need to find a way to reverse this so that the closer you get the alarm goes off. I do not have one of these units yet, am looking for some details first to see if anyone knows if it is possible to do so with an existing unit, and if so how to go about it. If anyone has any idea or knows of such a unit already it would be great. the unit needs to sound when a person wearing one part comes within say five feet of the other part. Thanks in advance

best regards,

Shawn

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#1

Re: Proximity Alarm

12/03/2012 7:55 PM

Have you lost your baby?

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#2
In reply to #1

Re: Proximity Alarm

12/03/2012 8:19 PM

No he has twin boys that do not get along with each other and somebody needs to supervise them when together.

The other issue is this hot uranium forgery that both boys should not be able to come close to which is set up in the living area.

The worst bit is the restriction order that was put on the forgery. It can not move closer to the wife than 5 meters. The alarm will prevent the forgery from being switched off.

The baby was already lost when I started writing!

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#3

Re: Proximity Alarm

12/03/2012 8:23 PM

Funny. Actually i do have twin boys but they are grown and get along well.

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#11
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Re: Proximity Alarm

12/04/2012 8:18 AM

Dont ask me how I knew this with the twin boys. Sometimes it is frighnin what inspiration one gets.

Did you ever call you best friend the same time he picked up the receiver to call you?

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#12
In reply to #11

Re: Proximity Alarm

12/04/2012 2:18 PM

"Did you ever call you best friend the same time he picked up the receiver to call you?"

That is so odd... I was just going to say that!

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#4

Re: Proximity Alarm

12/03/2012 8:25 PM

These parking devices do what you want. Not sure you could adjus to 5 feet or so.

But its directional and would not cover the full circumfernce.

Not sure about the baby alarm. Never had or used one.

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#5

Re: Proximity Alarm

12/03/2012 8:39 PM

what range are you talking about? you could use a smart phone with a program that uses the GPS information, or a variant on a theremin? Do you have a court order that someone cannot be within a certain range of you?

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#6

Re: Proximity Alarm

12/03/2012 8:58 PM

What does the thing really need to do?

The thought of a proximity actuator for a bomb is not out of the realm of possibility here.

Not an accusation, just an observation.

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#7
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Re: Proximity Alarm

12/03/2012 9:33 PM

It is for an idea to allow a person to have one device on them and others where they choose with voice alarms. For example in the bathroom it would say 'wash your hands' or the hallway remind you to grab your keys. Multiple units could be worn by different people in the house.

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#8
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Re: Proximity Alarm

12/03/2012 9:37 PM

I thought that I was the only one who was that forgetful.

If there's a market for this, maybe LynDoor™Industries, Dumb and Dumber Division would be interested in a joint development program.

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#13
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Re: Proximity Alarm

12/04/2012 2:42 PM

Hmmmnmmm... some observations, if you don't mind a few.

This device that a person would wear:

Must be washable, because people will forget to remove them

Must survive a ride in a clothes dryer, because... see #1 ↑

Must harvest energy from somewhere to recharge itself, because people will forget to check the battery

Must have a backup battery, because people will forget to wear them and charge the battery

Must be multilingual, capable of issuing reminders in at least two languages at once

The bathroom prompts applicable to males (as in "Lift the seat TOO", "Hey, gimme a flush", and "Drop the seat and lid") will be difficult to time correctly. Additional sensors may be required, I'll leave you to figure those out.

Must be able to determine kitchen trash can is at least 80% full; I don't want to be nagged about emptying it every time I walk past it, already had one of those.

Must be able to remind me to let the dog outside before the "It's too late to worry about it" indicator appears.

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#27
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Re: Proximity Alarm

12/05/2012 10:12 AM

Lyn, exactly my thoughts too (ESP?)!!!!

It'd make for a very workable IED trigger. OHC$AP, we just gave away the farm to the Tangos......another idea for them!!!

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#28
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Re: Proximity Alarm

12/05/2012 11:10 AM

of course CaptMoosie, could work for claymores too, shoe can fit both sides. Every time the enemy over there come close to us they trigger a barage of claymores, save our soldiers from actually having to shoot them and thus perhaps saving them from another case of ptsd. Didnt think about that, perhaps I should go into military contracts...not, too much paperwork.

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#30
In reply to #28

Re: Proximity Alarm

12/05/2012 11:48 AM

Where did you serve toolman?

Oh yeah, Claymores can be very effective for sappers in the wire.....

*kabang, end of story* [well, except picking up the itty bitty pieces later on.]

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#31
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Re: Proximity Alarm

12/05/2012 12:15 PM

I didnt really serve, did a six year stint in the Maryland army national guard (gives new meaning to weekend warrior..sat around smoking all day and little in the way of training, hardest part was actual basic training at Fort Leonard wood, missouri -or misery as we called it) that was back in 84

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#34
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Re: Proximity Alarm

12/05/2012 12:38 PM

Ohhh holy chit, we ate the same dirt man...at Lost-in-the-Woods! I was there in '78 for additional cross-training when I served with 3/75th Rangers!!!! I did my BMT & AIT at Ft. Benning (Airborne as 11B, and later and Ranger School). Hey, what can I say, I liked blowing chit sky high w/ C4! LMAO

Yeah, experienced the "hurry up and wait" way too often also.....good thing that smokes were very cheap back then, as I smoked like a freaking chimney when things got dull and boring! LOL

Was your MOS Combat Engineer, 21B?

RLTW!!!!!!

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#9

Re: Proximity Alarm

12/03/2012 9:46 PM

Unfortunately my electronics knowledge is still in vacuum tubes so i am rusty on that

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#10

Re: Proximity Alarm

12/04/2012 12:33 AM

This could be done with bluetooth devices , locking on your phone when you get in range.

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#14

Re: Proximity Alarm

12/04/2012 3:22 PM

Unfortunately the actual concept for this is still underway and proprietary, so I can only give examples of what it would do, not the actual reason or use. The description given is more than sufficient. If ten people wear this, each person goes by the other sensor, the voice message would sound once, then reset until they walk far enough away to then reset. if ten people walk in the room past the sensor each unit they are wearing will sound once, then they would walk out of the room. when they come back it will sound again. any help would be great, thanks

best regards,

Shawn

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#15
In reply to #14

Re: Proximity Alarm

12/04/2012 3:41 PM

Okay.

Your original request is about an existing baby wander alert, "...I need to find a way to reverse this so that the closer you get the alarm goes off." The alert signal is likely controlled by a relay. If it is a form A relay, replace with a form B. If a form B relay, replace with a form A.

Fin.

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#16
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Re: Proximity Alarm

12/04/2012 5:28 PM

I will look into that, I wouldnt think a relay would fit in a small package such as those. I thought they used a radio frequency that detects the presence of the other unit, but did not want to buy one until I know whether they can be reversed. thanks

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#17
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Re: Proximity Alarm

12/04/2012 5:41 PM

Solid state relays can be pretty small.

To boil down the function of the ranging receiver: As long as it detects whatever signal it is looking for at or above a determined intensity, the relay is open and it is quiet. When its signal cannot be found or falls below a threshold the relay closes and it makes whatever sound it makes. Invert the driven relay function, and you invert the audible signal pattern. Q.E.D.

I don't think this will really do what you desire, but this is the question you asked.

[edit] I am hoping you realize my guess of a SSR is exactly that. It is, in all likelihood, an incorrect guess at the actual component. Due diligence and investigation are required on your end.

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#18
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Re: Proximity Alarm

12/04/2012 5:58 PM

Thanks, yes I figure I need to research on my end, have tried to find the circuit info online but have not found specifics. I may have to dish out twenty bucks for one so I can see what the circuitry entails. I thought perhaps someone here might have seen the innards of one or knew basically what they use for their circuitry. Thanks.

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#19
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Re: Proximity Alarm

12/04/2012 6:03 PM

Yeah, I would guess that for twenty bucks retail a fellow isn't going to get a lot of factory support or documentation.

For all I know the newest versions of these kid rangers have no surface components at all, in which case there won't be any changing of anything going on.

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#20
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Re: Proximity Alarm

12/04/2012 8:43 PM

You could hire someone that says "good morning" when you come into the office. Its called administration. Make sure she is looking good and functionality can be tested.

She would always say "good morning" once, since she can register you are in the office!

Malfunctioning can occur, then you have to fire the accountant.

Its a little office with 10 persons! What is supposed to happen when the accountant meets the secretary. A courtous "good morning" twice???

Would like to have her say" its coffee time" when I walk past and " time to go home" when I walk past the second time!

Have a good day - -hey switch off that damn proximity detector...

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#21
In reply to #14

Re: Proximity Alarm

12/04/2012 8:47 PM

Oh Oh I have it. Its gonna be the "who is gone to toilet today counter".

Every boss needs one of those to find out who is the most effective thinker in the company.

Here is the idea. Place the administrator on the door guarding the toilets and let her say what you want the device to say:

"have fun"

"enjoy"

"that was only 5 minutes"

and so on

Great idea to make a device for this. Can you get a patent on this?

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#35
In reply to #14

Re: Proximity Alarm

12/05/2012 1:51 PM

Why don't you just get a bell for the boss, er cat?

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#22

Re: Proximity Alarm

12/04/2012 11:35 PM

I wouldn't bother asking here...all you get is smartarse answers, then there are those that only ask further questions to heighten their egos to make you feel smaller thinking you didn't ask the right question...look...how many answers (mine included) and not even one trying to help.

I would like to see how you go though...I could see this used on a child approaching the boundary pool fence...At least you know they are in the vicinity before the decide to try and climb (sorry if this was your idea).

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#26
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Re: Proximity Alarm

12/05/2012 9:43 AM

Oh lighten up. Nobody is being abusive.

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#33
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Re: Proximity Alarm

12/05/2012 12:30 PM

And no, I did not mark it as off topic....this was a pretty good comment actually. Cept for the crossed out bits...grin!

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#23

Re: Proximity Alarm

12/05/2012 4:39 AM

The adult or alarm half of the unit has a sounder that is probably driven by a transistor or FET. For a one off prototype, cut the PCB track leading to the base input of this transistor and solder in an extra transistor to invert signal to the base. Now the sounder is off when the sensor is far away and on when it is close. This has the advantage that the child half of the unit remains completely standard. Without looking at the circuit it is not possible to give detailed advice, but this can be done with little basic knowledge and a few tools. If you are not confident of doing it yourself, any radio repair man will only charge a couple of €,£,¥, (sorry did not check where you are located) for doing the job.

If you go into production you can have the PCB tracks laid out differently to accommodate the additional transistor. The change is so minor that the company who makes the original baby alarm may be prepared to make them for you as specials and badge them up with your logo. They will be extra keen if you will be purchasing lots of child units from them. This will reduce you time to market, keep your development cost low, and circumvent any possible legal action from the baby alarm manufacturers for infringing their copyrights or patents

One point worth checking, each set of baby units may be tuned as a matched pair on it's own frequency so that there is no cross talk between units in crowded places. Matching multiple child units to multiple adult units may require some changes by the manufacturer.

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#24
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Re: Proximity Alarm

12/05/2012 7:42 AM

Thanks jhhassociates, That is the information I was looking for. I can certainly try that once I get my grubby hands on one of them. I will see what can be done. makes sense to me. Then all I need to do is figure out how to change the alarm to a voice memo. I may actually contact the company that makes them.

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#29
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Re: Proximity Alarm

12/05/2012 11:26 AM

Voice chip hardware and software, again for prototypes only, try talkingproducts.com

Purchase price (1 off) £5.99 (about$10) for a complete system including PCB chip, batteries, microphone, record and playback switches and speaker in a relatively small package. It may cost you more than that to get it mailed to you.

The chip alone when buying in bulk (500) comes in at under £1.40 ($2) it can be built directly onto your modified PCB but then you need to add the equipment to record it and a speaker.

My comment about sub-contracting the manufacture to a baby alarm maker still stands. It means that you can tap in to their economies of scale during your start up period.

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#32
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Re: Proximity Alarm

12/05/2012 12:23 PM

Darned good answer!

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#25

Re: Proximity Alarm

12/05/2012 7:54 AM

Didn't car alarms in the late 90's or early 2000's do something like this. I remember getting the "Step away from the car" announcement a few times if I got too close to a car. Those sensors may have worked by detecting vibrations or movement. Not sure but another possibility that you may want to check.

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#36
In reply to #25

Re: Proximity Alarm

12/05/2012 2:12 PM

My aftermarket proximity car alarm would only chirp if you were to close, I was unable to find one with a voice warning.

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#37

Re: Proximity Alarm

12/05/2012 5:38 PM

I was 12B10 combat engineer CaptMoosie. Our national guard bunch was lazy though. I got out just before desert storm after being in the IRR for a couple years, I was sweating thinking I would go but got my discharge right after our local reserve unit went. I had transferred to reserves from the guard and was serving the rest of my time.

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#39
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Re: Proximity Alarm

12/05/2012 6:21 PM

Was your USAR unit up here in New York at the time? IF yes, 464th Eng. Btn., C or HQ Company, at the Horace C. Brandt Reserve Center in Schenectady? That was my old unit.....

I saw your website. Nice graphics work there! I also see you're up next to Ft. Drum (Camp Swampy LOL). Familiar w/ the reinforced concrete aircraft tarmac & helio pads at Wheeler-Sack Airfield? Them's my puppies....design those under a US Army Contract some time ago. Kinda miss the place (for AT), 'cept the damn skeeters and those freaking little black flies! LOL

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#40
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Re: Proximity Alarm

12/05/2012 6:32 PM

No I was in maryland. I transferred from the national guard and ended up in the 372nd military police unit, they didnt like engineers and I got into some trouble there(because they didnt like me from the time I walked in the door) which was why I ended up in the IRR. I actually work full time as a civillian nurse on Fort Drum at the urgent care clinic now, and do graphics on the side. skeeters and black flies are still here and still a pain. cant go in my yard in the summer without spraying down. I actually majored in chemistry and physics in college after two years of electronics, but came a few courses shy of my bachelors and was a heavy alcoholic, I am now free of the alcohol for almost twelve years, I had worked in industrial maintenance for many years and other similar jobs, so I decided if I can build equipment and make it run better and work better, and having helped other people with projects, I decided I could do some work on the side for people who cannot afford a large engineering firm to do small jobs. I have a keen knack for making things work and better. More or less it is a side job though, nothing big just helps out a bit with the bills and extras. I actually grew up in western maryland and west virginia.

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#38

Re: Proximity Alarm

12/05/2012 6:16 PM

The talking products site is very interesting and I might see if they can make something such as this. I did find a motion sensor with a recordable alarm, though my concern with this is that too many people will have it go off constantly but still a possiblility. perhaps if I can wire a photo sensor with the recordable alarm instead of the motion sensor and have it go off when the light is broken, might suffice but still think it would create too much if many people are present. I got a lot of options though.

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#41

Re: Proximity Alarm

12/06/2012 9:28 AM

Why not utilize some RFID technology. This can provide almost limitless responses based on the RFID info detected and it has become rather inexpensive to use.

good luck,

DonP

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#42
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Re: Proximity Alarm

12/06/2012 2:02 PM

An approximate 5 foot read would take active RFID.

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#43

Re: Proximity Alarm

12/06/2012 3:48 PM

Don P and doorman, thanks. I had not even thought of RFID technology, just would have to find one that works in reverse of the usual. I saw some devices online fairly cheap but have no idea how to modify them but will keep looking. surely someone out there has used something like this before for proximity detection. Thanks very much.

CaptMoosie, are you still in the service?

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#44

Re: Proximity Alarm

12/06/2012 6:17 PM

Hey thanks guys, that hit the nail on the head. rfid such as store alarms, I can find the tags fairly cheap, even the kind that work with a car. the problem now is distance and the actual alarm but think they should be fairly easy to take care of. If I can find the alarm type similar to the stores they work as you pass through the posts in stores so that would be ideal. Now if I can find a unit cheap and change it so that it sounds once , or if not possible then at least a button you hit to reset it, and that it can be made to sound a voice recording. I think these should be relatively easy to work out.

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