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UER Forum > Archived UE Tutorials, Lessons, and Useful Info > perimeter alarms (Viewed 1732 times)
Mr. Mang 


Location: Kentucky


every day is a trip, but i aint trippin.

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perimeter alarms
< on 4/16/2013 1:49 AM >
Posted on Forum: UER Forum
 
I've been looking around on the forums for articles related to not getting caught, and haven't found any. I typically explore alone or with one other person in rural areas where you can't always see who's coming around the corner.

Does anyone else use a perimeter alarm or have any clever ways they avoid being sneaked up on?

(I'm just posting this image because it made me laugh. Pretty clever, though...)


exMan 


Location: near Williamsport, PA
Gender: Male




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Re: perimeter alarms
<Reply # 1 on 4/16/2013 2:04 AM >
Posted on Forum: UER Forum
 
using an alarm seems like it could be a double edge sword - while it could give you a warning that somebody is coming, it might also tell those coming that somebody is in the area that they might not have otherwise expected

then there's things that could go wrong, like the alarm being tripped accidentally which, again, might alert anyone in the area that something is up

i wonder what kind of silent alarms could be employed though?

edit...

this is along the lines of what i was thinking of

http://www.youtube...atch?v=Hj5krNLWZPY
[last edit 4/16/2013 2:14 AM by exMan - edited 2 times]

Mr. Mang 


Location: Kentucky


every day is a trip, but i aint trippin.

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Re: perimeter alarms
<Reply # 2 on 4/16/2013 2:13 AM >
Posted on Forum: UER Forum
 
ex, i was looking around for something like this. silent would be much better... except maybe a guy like me that always has terrible signal.

Tom133t 






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Re: perimeter alarms
<Reply # 3 on 4/16/2013 2:26 AM >
Posted on Forum: Infiltration Forums
 
I have actually prototyped a system. This is quite possibly overkill, but I built a wireless trip-alarm transmitter which sent an audio tone to a headset.


You can pick up these magnetic door alarms for a dollar. They have adhesive backings and, once turned on, emit a really loud screech or chime when a magnet is removed from its side. You can either just use a vanilla one like this, or you can try what I tried.
I opened the unit up and snipped the two speaker wires. I spliced them onto the audio-in jack on a small audio transmitter. These things are cheap little devices used to transmit radio signals over short distances. Typically, it's so you can play your MP3 player's audio over car speakers, or beam the audio to a radio across your house. I used it to transmit the alarm tone to a portable radio, which I was able to put in my pocket and listen to with earbuds.
The mechanism for tripping the alarm is up to you. You can simply mount your duct-taped rat's nest of a transmitter alarm on a doorframe, or rig something up with monofilament. It is worth noting that this was a prototype. The transmitter range was pretty terrible, even when I juiced it up with a 9-volt battery. It required a line of sight, and couldn't go more than 20 feet. However, the concept works. If you've got some skills with electronics, you could beef the system up, ooooor just transmit with walky-talkies instead. That might work a whole lot better.

Mr. Mang 


Location: Kentucky


every day is a trip, but i aint trippin.

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Re: perimeter alarms
<Reply # 4 on 4/16/2013 11:46 AM >
Posted on Forum: UER Forum
 
very interesting. i don't think anything can be overkill when it comes to a potential trespassing charge. i was really surprised there weren't a lot of threads dedicated to this type of thing.

this one looks promising, but you'd have to figure out a way to power the receiver other than a wall outlet. lugging around a big batter doesn't sound like a lot of fun. the 1/2 mile range and price are attractive though.




http://www.amazon....oor#productDetails

[last edit 4/16/2013 12:24 PM by Mr. Mang - edited 1 times]

Tom133t 






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Re: perimeter alarms
<Reply # 5 on 4/16/2013 2:53 PM >
Posted on Forum: Infiltration Forums
 
Yeah, just rig up the magnet alarm to a walky-talkie. Plenty of range. The only thing that you have to consider is mounting it in navigational a choke point. It's only useful if there's one way in and out.

Mr. Mang 


Location: Kentucky


every day is a trip, but i aint trippin.

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Re: perimeter alarms
<Reply # 6 on 4/16/2013 3:03 PM >
Posted on Forum: UER Forum
 
My target location has two roads I am concerned about. If I could just have those two taken care of it would be a really enjoyable day of exploring and shooting photos without being so paranoid.

Thanks for replying and keeping the thread alive. It's cool to see what everyone has to say.

Tom133t 






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Re: perimeter alarms
<Reply # 7 on 4/17/2013 3:39 AM >
Posted on Forum: Infiltration Forums
 
Be careful. Putting tripwires across roads and attaching them to crudely patched-together electronics is a great way to get the bomb squad to show up.

TeePER 


Location: Burlington, Ontario
Gender: Male




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Re: perimeter alarms
<Reply # 8 on 4/17/2013 4:39 AM >
Posted on Forum: UER Forum
 
You could look into radios. If you rig the PTT button from a cheap radio into a NO switch set up as a trip wire, most cheap radios will transmit a few beeps or a little tune when the button is pressed. (even if they don't, you'll hear the squelch open)

But tom133t has a good point about a bomb squad, once you start getting into crudely built radio transmitters, things can escalate very quickly. (DEA, bomb squad, etc)

Have you thought about a lookout?

Tom133t 






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Re: perimeter alarms
<Reply # 9 on 4/17/2013 5:09 AM >
Posted on Forum: Infiltration Forums
 
You could just put the radio guts neatly into a box with some sort of laser / IR motion detector. Rig up the beep button to that.

Mr. Mang 


Location: Kentucky


every day is a trip, but i aint trippin.

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Re: perimeter alarms
<Reply # 10 on 4/18/2013 12:13 PM >
Posted on Forum: UER Forum
 
I had in mind two things when I posted earlier in this thread. I'm interested in this for rural exploration, where there may be one or two roads that wind through overgrowth and you cannot see who may be coming around the corner.

1.) fishing line with cans on both ends, so if someone walks across it they just make noise from the cans banging around. a cheap, low tech way to do it, but not a good choice, as it makes it obvious someone is there.

2.) hidden motion sensors (not a tripwire) that transmits a signal to me when it's tripped via walkie talkie or radio. nobody would know it was there. camouflaged with no tripwires, etc...

I'll do some research on how to build the latter.

Sometimes I'm lucky to find one person to explore with, so having an extra as a lookout can be hard to find.

Se7eN 


Location: Seattle, Washington
Gender: Male


coming to an elevator shaft near you.

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Re: perimeter alarms
<Reply # 11 on 4/18/2013 10:15 PM >
Posted on Forum: UER Forum
 
don't get me wrong these things are usefull and all but a simple dvb-t tuner, a sdr app for your device, and the relevant adapter to fit it to your mobile device is a quick and cheap way of making a police scanner, since you know, that's who your worried about anyway. also since it really just looks like electronic gagetry, if caught you simply explain the setup as "i like to watch tv on my phone".(http://www.amazon....iver/dp/B005OPLE5G for those who are interested)

Voted most likely to fall from great hights...
exMan 


Location: near Williamsport, PA
Gender: Male




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Re: perimeter alarms
<Reply # 12 on 4/18/2013 11:21 PM >
Posted on Forum: UER Forum
 
another obvious solution that we all missed is simply having someone be a lookout

course you have to have a comm link of some sort

Uncle Goose 


Location: Ghent, Belgium
Gender: Male


The Goose knows best.

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Re: perimeter alarms
<Reply # 13 on 4/28/2013 8:57 PM >
Posted on Forum: UER Forum
 
Me and my buddy use a Secvest system from Abus. Normally they work with a power cord but they also operate on batteries. The batteries last about 8 to 9 hours so time enough to do an exploration. Our system works with a message system similar to a cellphone, once somebody trips the motion sensors (which are radio remote) we get a message on our phone that somebody tripped it. The only setback is that a Secvest is quite expensive to buy but we had the luck of getting one for free. It's a very handy tool although one can not use it everywhere, especially not locations with multiple entrances and such.

A 1000 days of sorrow can disapear in a split second, it takes only one person to make it happen.
SuchundFind 


Location: San Antonio, Texas
Gender: Male




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Re: perimeter alarms
<Reply # 14 on 4/28/2013 9:29 PM >
Posted on Forum: UER Forum
 
There are a couple of high range wireless motion sensors out there. You could also use a wireless camera you point towards the entrance you used, so before you leave, you can check out if someone is waiting there for you.

If you park in front of it, get motion senors that are very sensitive, so when someone walks along your vehicle they will go off and you have a warning that someone is nearby. Please turn them off when you leave later on.
Parking on front of a building isn't against the law, so while it will warn you, it won't tell anybody if you are in there, or if you just parked there.

But like others do, just try to blend in.
The last time I checked out this half finished houses, I just had my amber light bar on my vehicle and a cone behind it.
This always makes people believe I belong there.



TeePER 


Location: Burlington, Ontario
Gender: Male




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Re: perimeter alarms
<Reply # 15 on 6/16/2013 7:56 AM >
Posted on Forum: UER Forum
 
Posted by Se7eN
...simple dvb-t tuner, a sdr app for your device, and the relevant adapter to fit it to your mobile device is a quick and cheap way of making a police scanner...


You could always take this one step further, use multiple sdr-capable-tuners and then you can do really fun things like "track" (rssi-guessed direction & rssi-guessed-distance) where and how far away the police are when they key up their radios.

And if you get a real sdr, you can actually ask the radios to transmit, (silently) so you can track them without them having to key up the radio.


SuchundFind 


Location: San Antonio, Texas
Gender: Male




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Re: perimeter alarms
<Reply # 16 on 6/22/2013 3:46 PM >
Posted on Forum: UER Forum
 
Posted by Se7eN
don't get me wrong these things are usefull and all but a simple dvb-t tuner, a sdr app for your device, and the relevant adapter to fit it to your mobile device is a quick and cheap way of making a police scanner, since you know, that's who your worried about anyway. also since it really just looks like electronic gagetry, if caught you simply explain the setup as "i like to watch tv on my phone".(http://www.amazon....iver/dp/B005OPLE5G for those who are interested)


Or you just get the police scanner app that already has everything you need.
In some states you can get in trouble for having devices with you that can listen to police frequencies, this excludes ham radio people.

And when your phone is locked the police needs a warrant to search it, so the police scanner app is better protected than carrying all kind of tuners with you around that are openly visible.

Olaf 


Location: Wilmingon, NC
Gender: Male




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Re: perimeter alarms
<Reply # 17 on 6/24/2013 8:50 PM >
Posted on Forum: UER Forum
 
I like having someone who's a lookout with a walkie, reliable, better senses and it can think for its self.

"I have come here to chew bubble gum and kick ass, and I'm all out of bubble gum"

http://i22.photobu...er_zpsdbf6a059.gif
elementofone 






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Re: perimeter alarms
<Reply # 18 on 7/6/2013 12:59 AM >
Posted on Forum: UER Forum
 
the easiest way to not get caught is to be careful and super sneaky....like a ninja! dont use flash or flashlights at night....if you do need a flashlight use one with red leds as they are less likely too be seen

Mr. Mang 


Location: Kentucky


every day is a trip, but i aint trippin.

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Re: perimeter alarms
<Reply # 19 on 7/10/2013 5:33 PM >
Posted on Forum: UER Forum
 
i will be working on one in the near future, and keep everyone updated!



1.) the problem with lookouts is (for me) they are hard to find. i usually only travel with one other person, and they're not experienced.

2.) cell phone systems are nice, but i have a carrier that doesn't work in that area.

UER Forum > Archived UE Tutorials, Lessons, and Useful Info > perimeter alarms (Viewed 1732 times)
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