security sensor needed for garage door

On Mon, 16 Jun 2008 12:08:42 -0500, with neither quill nor qualm,


Excellent!



That could work, but it could be easily sidestepped by lifting your
legs over it.

I have these X-10 systems for my entryway:
http://www.x10.com/security/sc546a_s.html Scroll down to the set,
consisting of the chime, EagleEye IR detector, and RF transmitter.
$45 + s/h. (less on eBay)

And I saw this $20 special in the recent HF ad:
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93068

Put 2 strips of tape over the right and left edges of the IR detector
to limit it to a narrower area of detection. It will cover the full
height of the garage door automatically.

--
The only way not to think about money is to have a great deal of it.
                                                  -- Edith Wharton

wrote:


The rounded piece is an infrared motion detector, the larger part its
remote receiver & alarm. If you mount the detector behind the garage
door track it would mask the garage interior and only view the door
opening. They work pretty well, but the chime sound becomes annoying
quickly.

On Mon, 16 Jun 2008 12:08:42 -0500, Randy wrote:

On Mon, 16 Jun 2008 11:55:31 -0700, with neither quill nor qualm,


Not AGAIN!?!  That's irresponsible, mon. 50 demerits.

--
The only way not to think about money is to have a great deal of it.
                                                  -- Edith Wharton

On Mon, 16 Jun 2008 20:52:34 -0700, Larry Jaques


sigh..yes indeed.  I didnt get  home for 3 weeks..and the ex is a
ditz.

shrug



at yoyodyne they were all veterans of the psychic wars
 exiled from the eighth dimension where the winds of limbo roar"
              mariposa rand mair theal

My shop has no windows so on nice days I like to keep the overhead
door open.  Well some kid watched me welding for awhile then decided
it was safe - snuck in and stole my laptop computer that was connected
to my CNC mill.

Got him on video, filed a police report.

I need some kind of photocell and beam across the doorway to alert me
if anyone walks in.  Can garage door safety beams be used?  I have a
couple of friends that can wire up or build me a circuit to make them
work,  I just don't know how the work, is there a NO or NC output on
those?  I was told you cannot just jumper them out, so I'm thinking
it's more like a signal output rather than a switch closure output.

Thank You,
Randy

Remove 333 from email address to reply.

Since most are two-wire affairs, it might not be easy to interface to the
sensor circuit directly, but ...

Most of the garage door safety beams have an LED on the receiver that is
ON when the beam is on, and blinks when the beam is interrupted.

So -- just pick up the LED signal, and process that.

LLoyd

  The video sounds interesting  care to share some
details?


  I have one of these: http://www.drivewayalert.com /

and one of these:  :http://www.gtoinc.com /

and a couple of dogs in an electric fenced yard.
The fence doubles as a inductive loop security system.

The fence keeps the dogs in and unwanted visitors out

The owner is known to be armed..  ED

wrote:


About 6 min long, 65 meg file.  Don't know about the legal
ramifications of putting it on youtube.  Guy goes form watching me to
checking out the pickup truck several times.  I guess when he fiqures
I'm busy welding he comes in sees the laptop and takes off with it,
does spend enough time to take the power adaptor too.

Pawn shops I checked at said they would not even buy something that
old.  I need old because I need a serial port.

Thank You,
Randy

Remove 333 from email address to reply.

Randy wrote:


I have the exact same problem, being in downtown Nashville a few blocks from
the homeless mission.  I call my alarm "bum alert".  I have an infrared
beam with a NO output sending power to a VERY audible chime.  The beams are
placed just inside the overhead door at 24" high.  I have a bypass switch
so I can kill it while backing in a trailer or other such blockage.  The
trick is placing the chime far enough away from the beams that the average
person can't tell where the trigger is.

Before I had mine installed, I would turn around and have a bum three feet
behind me wanting a handout.  More than a few times.  I have had people try
to jump it, but most of the time they trip it.

Here are the beams I use:
http://tinyurl.com/5rnnty

I had a set left over from a gate operator job.  A security buddy flowed me
the chime and a power supply & I was set.  Less hassle than a pooch.

Good luck.

John L. Weatherly

please remove XXXs to reply via email

I might try one of these..

http://www.minute-man.com/acatalog/Security_Kits.html#a80_2d013

or more likely 2 of them mount hi/lo to make it hard to duck under.  I
can mount this inside hidden by the door track.  Anything outside I
would not trust.

anyone hear of minute-man?



Remove 333 from email address to reply.

Randy wrote:

I know one place that uses an am or fm radio.  When a person activates a trigger
(Opens
the door and finds themselves inside a small cubicle) the radio blares out at
about 120
db. - in the shop but well heard in the cubicle.

You can use many different triggers.  The beam works fine but leaves a visible
trail in
dusty or smoky conditions.  You may want to install one to give them something
to dance
around while they activate another one. :-)

A very simple motion sensor works well.  You can rig a flood light sensor so
that a bulb
comes on or you can screw in a plug and have it activate the above mentioned
radio or
anything you can plug into that outlet. Sensor does not have to be mounted on
the flood
bulb set.

Personally, I'd use a couple different switches so they never know what or which
triggered
the notice  or you may make them progressive.  The first one could turn on a
light or
sound a small chime in the location you expect to be in.  This one could
figuratively say,
"Someone just rounded the corner of the building."  The next one could sound a
different
alarm and let you know their progression.  The time lapse in between the two
would tell
you their approx. speed (sneaking, running, etc.)   When they walk past a yellow
lined
do-not-enter area  (or whatever you choose) you could make it sound like all
hell has
broken loose!  This way they'd know that you knew!  Bells, whistles, lights, the
works! :-)

It can be as simple or complex as you wish to make it.  First, You need to know.
 Second,
They need to know that you know.  They could be casing the place for a return
when you're
not around.  You can get auto dialers to call you or anyone else if the place is
entered
during certain periods of time. I know of one auto dialer that calls several
different
numbers and announces that a high level alarm has been triggered or that there
seems to
have been a bearing failure in a lift station - giving the identity of the
station.

trigger (Opens

about 120

trail in

to dance

that a bulb

radio or

the flood

which triggered

light or

figuratively say,

different

would tell

yellow lined

hell has

the works! :-)

know.  Second,

when you're

is entered

different

seems to

station.

http://cgi.ebay.com/WIRELESS1000-Optex-wireless-visitor-Annunciator-NIB_W0QQitemZ190229375542QQihZ009QQcategoryZ41969QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

crom...but its not rocket science.

ebay search on "optex"  or 'door annunciator'

If worst comes to worst, drop me an email and i can probably come up
with a set or two of paired photo beams used in industry from my stuff


Gunner

at yoyodyne they were all veterans of the psychic wars
 exiled from the eighth dimension where the winds of limbo roar"
              mariposa rand mair theal

    [ ... ]


trail in

to dance

    Note that you can get infrared LEDs and sensors, so nobody can
see it -- without optical enhancement like night vison scopes. :-)

    And yes -- also put in a visible one to give them something to
try to work around. :-)

    Enjoy,
        DoN.

--
    (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
           --- Black Holes are where God is dividing by zero ---