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Jecksons Ben
12/11/11 23:41
  12/11/11 23:47

Read: 500 times

#185075 - OK..great..maybe Links
Responding to: Andy Neil's previous message
Thank you all

[On/Off connected to one of "sensitive leg" AT89S51/2 which related to firmware ]

As we knew that simple switch maybe very-very cheap--->the knob that appears from boxes(maybe below).
But that way only at "hard base" and "weight of Box" related to switch operation(ON/OFF).
What about soft base?like placing at above bed.
Shake the box? without pull from base..
Let that for "portable" equipments.

First,I'm thought with low cost accellerometer(1 axis/2 axis).But NO at local electronic stores.

Then,I saw only "reed switches" and the cost very cheap.

Placing very low cost magnet(with Ballpoint pegas),which taken from pulpen..

So,like like this:
In magnifier...(I only used 1 magnet and 1 spring).

I'm calculated the flexibility of spring(tug the spring of pulpen for it) and distance of magnet to reed switch for operation of thief protection.

Maybe there's another ways?links?

Thank you
Jeckson S Ben

List of 28 messages in thread
Freeze..thief protection      JecksonS Ben      12/10/11 07:27      
   Alarm Sensors      Joseph Hebert      12/10/11 11:06      
      Earth magnetic field sensor      Bert Van Den Berg      12/19/11 10:36      
         inexpensive solid state magnetic field      JecksonS Ben      12/20/11 01:36      
         It means..      JecksonS Ben      12/28/11 04:27      
            ???      Per Westermark      12/28/11 06:11      
               same      JecksonS Ben      12/31/11 04:12      
   Too vague!      Andy Neil      12/10/11 12:04      
      Cost - and what type of protection/detection      Per Westermark      12/10/11 13:21      
      How low is "low" cost?      Andy Neil      12/11/11 07:33      
         OK..great..maybe Links      JecksonS Ben      12/11/11 23:41      
            Still no idea what you actually want      Andy Neil      12/12/11 14:12      
      What exactly?      JecksonS Ben      12/12/11 23:53      
         Bounce        Per Westermark      12/13/11 00:59      
            OK      JecksonS Ben      12/14/11 00:32      
         If it's networked      Andy Neil      12/14/11 13:43      
            hard to handle      JecksonS Ben      12/15/11 01:19      
               Come on ... it requires a number        Richard Erlacher      12/15/11 08:42      
                  numbers      JecksonS Ben      12/16/11 01:02      
            cost and reliability        Joseph Hebert      12/16/11 06:36      
               cost      JecksonS Ben      12/17/11 03:44      
                  Does that mean you don't know what your price target it?      Richard Erlacher      12/17/11 08:57      
                  soft base      Joseph Hebert      12/17/11 10:11      
                     manufacture products      JecksonS Ben      12/18/11 03:07      
                        shock sensors        Joseph Hebert      12/18/11 16:17      
                           advice      JecksonS Ben      12/19/11 00:49      
                              Capacitive solutions can be projective      Per Westermark      12/19/11 01:00      
                                 metal..      JecksonS Ben      12/19/11 01:09      

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