Re: [mh] Dead bolt sensing - was I gots a new toy (Elk M1)

[<br...@ha...>]

Do you have any pictures of what you did?

Thanks
Brad
>
>
> I did something similar for all of my doors.  I drilled a very shallow
> hole
> in the end of my dead bolts and glued in a Radio Shack 64-1895 rare earth
> magnet.  The magnet uses a 3/16" hole and sticks by itself to the deadbolt
> hole so the glue may not even be necessary.  In fact, if you put the
> magnet
> in the hole for testing, it is very hard to get out.
>
> For the switch, I just used a magnetic reed switch in the deadbolt door
> frame hole.  The switch is shimmed to the proper distance from the magnet
> when the dead bolt is engaged.  You can get normally open or normally
> closed
> switches to suit your preference.  Just be sure to get small enough
> switches
> to fit completely inside the dead bolt door frame hole.  I don't recall
> where I ordered mine.  The ones from Radio Shack were too long.
>
> The installation was easy.  I just carefully pried the trim off the inside
> of the door frame and everything was accessible.  I ran the wire inside
> the
> frame and drilled a hole directly down into the basement.  Be sure to test
> everything before you put the trim back on.
>
>
>
> -----Original Message-----
> From: mis...@li...
> [mailto:mis...@li...] On Behalf Of Jim
> Serack
> Sent: Monday, December 03, 2007 1:18 PM
> To: 'The main list for the MisterHouse home automation program'
> Subject: Re: [mh] I gots a new toy (Elk M1)
>
> I have deadbolts where the frame is not exposed. I have DS10A RF sensors
> and
> I have put a rare earth magnet in the brass handle of the inside deadbolt
> -
> when it is over a reed switch the bolt is engaged. This was particularly
> useful where the two front doors lock together (one with top and bottom
> pins) since wires are really asking for trouble.
>
> I also have made but currently don't use a metal locator coil behind the
> deadbolt plate - in the frame - the coil is part of an oscillator circuit
> whose frequency changes when the bolt is engaged (inside the coil). I'm a
> fan of non-contact detecting of things like locks, door position, etc - I
> think there is less likely hood of interfering with the lock function.
>
> Jim
>
> -----Original Message-----
> From: mis...@li...
> [mailto:mis...@li...] On Behalf Of MrT
> Sent: December 3, 2007 12:57 PM
> To: mis...@li...
> Subject: Re: [mh] I gots a new toy (Elk M1)
>
>
>
>
>
> Ralph Mitchell wrote:
>>
>> On Dec 3, 2007 11:15 AM, MrT <tar...@ya...> wrote:
>> ... would it be practical to embed a coil in the doorframe, ... There
>> should be enough steel in the bolt to alter current flow in the coil
>> and there'd be no switch to wear out. ...
>>
> That's a very interesting idea!  I think putting it into practice will be
> tricky.  Installing a coil in the deadbolt pocket is not easy and the
> deadbolt's movement can damage the windings.  Some lock manufacturers
> provide a plastic dust-jacket to fit within the pocket and improve its
> appearance.  Perhaps the coil could be wound around the dust-jacket.
>
>
> I would not be overly concerned with a switch's reliability. Most
> switches,
> designed for alarm systems, are very reliable and work for years without
> failure.
>
>
> --
> View this message in context:
> http://www.nabble.com/I-gots-a-new-toy-%28Elk-M1%29-tf4925988.html#a14134997
> Sent from the Misterhouse - User mailing list archive at Nabble.com.
>
>
> -------------------------------------------------------------------------
> SF.Net email is sponsored by: The Future of Linux Business White Paper
> from
> Novell.  From the desktop to the data center, Linux is going mainstream.
> Let it simplify your IT future.
> http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4
> ________________________________________________________
> To unsubscribe from this list, go to:
> http://sourceforge.net/mail/?group_id=1365
>
> -------------------------------------------------------------------------
> SF.Net email is sponsored by: The Future of Linux Business White Paper
> from Novell.  From the desktop to the data center, Linux is going
> mainstream.  Let it simplify your IT future.
> http://altfarm.mediaplex.com/ad/ck/8857-50307-18918-4
> ________________________________________________________
> To unsubscribe from this list, go to:
> http://sourceforge.net/mail/?group_id=1365
>
>
>
>
> -------------------------------------------------------------------------
> SF.Net email is sponsored by:
> Check out the new SourceForge.net Marketplace.
> It's the best place to buy or sell services for
> just about anything Open Source.
> http://sourceforge.net/services/buy/index.php
> ________________________________________________________
> To unsubscribe from this list, go to:
> http://sourceforge.net/mail/?group_id=1365
>
>