will this alarm go off if I move it??

[Imp]

http://www.electrokits.com/electronics/security/119.htm

 

[Sjouke Burry]

http://www.electrokits.com/electronics/security/119.htm

Dont think so, a reed relay is not a movement detector.

 

[Spehro Pefhany]

Dont think so, a reed relay is not a movement detector.

Vibration detectors use a relatively heavily weighted mass that moves
easily and is held in contact by a relatively light (eg. spring)
force. You'd have to whack a reed very hard to get it to open, and
maybe hard enough to destroy it to get it to close.


Best regards,
Spehro Pefhany

 

[James Thompson]

http://www.electrokits.com/electronics/security/119.htm

Tell us exactly what you want. Be very specific. Then you may get what you
want.

 

[ehsjr]

http://www.electrokits.com/electronics/security/119.htm

Yes it will, if you move it far enough. It is a reed switch
and a separate magnet. You put the magnet near the alarm
circuit. When you separate them, the alarm goes off. If
you move both the magnet and the switch together without
changing the distance between them, it won't go off.

Ed

 

[William P.N. Smith]

Tell us exactly what you want. Be very specific. Then you may get what you
want.

Yeah, what James said. History shows that "I want something to scare
the cat when she jumps on the counter" gets a lot more responses (and
maybe even solutions you hadn't thought of) than "I want an alarm to
go off when something moves", especially when you can't or won't
define "something" or "moves".

 

[Lostgallifreyan]

Yeah, what James said. History shows that "I want something to scare
the cat when she jumps on the counter" gets a lot more responses (and
maybe even solutions you hadn't thought of) than "I want an alarm to
go off when something moves", especially when you can't or won't
define "something" or "moves".

I was concerned about the vagueness, once that perceptive question was made
by Jame Thompson earlier, when the OP tried his first attempt to launch
this in a new thread.

He asked "Does it need the ability to go bang?".

That got me thinking, and the only things we know are that the thing is
size-limited to a 'box' about 3" thick, 10" long, i.e. a size that could be
easily stowed in a laptop computer bag. We also know that mercury switches
were vehemently rejected, and I considered the possibility that if those
were in such a bag, and if such a bag were passed through the x-ray machine
at a customs checkpoint, the dense liquid metal might be highly detectable,
and suggestive of a triggering device.

I didn't speculate any further before I decided that in the absence of a
straight answer from the OP, I wasn't going to assist. I recommend similar
caution to others. Fortunately, I am seeing such caution.