Groups > sci.electronics.design > #446449

Re: Blocking RF from intentional radiators

From	John S <Sophi.2@invalid.org>
Newsgroups	sci.electronics.design
Subject	Re: Blocking RF from intentional radiators
Date	2017-02-06 14:07 -0600
Organization	A noiseless patient Spider
Message-ID	<o7aku1$1cp$1@dont-email.me> (permalink)
References	<o7996i$3j6$1@dont-email.me> <vpbh9ct4inb1uj0651gmk62970rsa2vsod@4ax.com> <o7aghb$hnj$1@dont-email.me> <48jh9cl3sekgima57119vb8facdtnf9n12@4ax.com> <o7ajsc$umm$1@dont-email.me>

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On 2/6/2017 1:49 PM, Don Y wrote:
> On 2/6/2017 12:31 PM, Jeff Liebermann wrote:
>> On Mon, 6 Feb 2017 11:52:05 -0700, Don Y <blockedofcourse@foo.invalid>
>> wrote:
>>
>>> I want Joe Average User
>>
>> I prefer the GUM (great unwashed masses).  The problem with average is
>> that a few super-intelligent users nicely balance an ever growing
>> horde of users with limited intelligence.  If you don't like GUM, I
>> suggest Joe Median User, which is half way between equal numbers of
>> intelligent and dumb users.
>
> I'd be happy raising the bar to the level of "folks who CAN install/replace
> their own opener" -- but suspect even this is a big hurdle for many!
> Despite the "See Spot!  See Spot Run!" sort of instructions that typically
> accompany them (and the fact that the mechanical mounts are usually already
> in place for the more common REPLACEMENT vs. NEW INSTALL.
>
> Beyond that, having to provide make/model specific instructions as to how
> to disassemble an already installed unit and modify it ("short R1 located
> adjacent to ...") is just too much to codify AND too much to expect from
> the user!
>
>>> to be able to cripple the "wireless" activation/control
>>> of his opener -- without having to disassemble it *or* consult an
>>> exhaustive
>>> compilation of "if you have model X, do this" rules.
>>>
>>> Once crippled -- and until "restored" -- neither his remote nor any
>>> OTHER
>>> remote should be able to affect the operation of the opener.
>>
>> In other words don't touch, tweak, modify, add, remove, or change
>> anything.  I don't think that's possible.
>
> The obvious solution is to interfere with the ACCESSIBLE antenna.
>
>> I guess the minimally invasive solution would be some kind of adapter
>> that goes between the mechanics of the GDO and the receiver.  The
>> wires to a GDO are normally screw terminals so this could be a PCB
>> with spade lugs on one side, and screw terminals on the other.  A
>> simple on/off switch to turn off the power to the receiver would be
>> the minimum.  Presumably, the members of the GUM are qualified to
>> operate a screwdriver.  If you need subterfuge, a few magnetic reed
>> switches and some potting compound should work.
>
> But the electronics in the opener typically INTEGRATE the receiver
> functionality with the "logic" to power the mechanism, sense stall
> current, limit switches, etc.  You'd want to preserve that but
> not allow the receiver to interact with it (i.e., initiate activity)
>
>> You still haven't answered my question.  What problem are you trying
>> to solve?
>
> I want to disable the wireless control of the opener.  Jim's opener
> has a FEATURE that allows this.  So, how do you retrofit that
> feature to other openers, without requiring the opener to be
> replaced or the owner/user to undertake some disassembly activity
> that can potentially irreparably damage the opener?
>

Geeze, what a waste of time.

Thread

Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 00:40 -0700
  Re: Blocking RF from intentional radiators whit3rd <whit3rd@gmail.com> - 2017-02-06 00:56 -0800
    Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 02:19 -0700
      Re: Blocking RF from intentional radiators Robert Baer <robertbaer@localnet.com> - 2017-02-08 20:22 -0800
  Re: Blocking RF from intentional radiators piglet <erichpwagner@hotmail.com> - 2017-02-06 11:57 +0000
    Re: Blocking RF from intentional radiators "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-02-06 06:51 -0600
    Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 06:52 -0700
      Re: Blocking RF from intentional radiators Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-06 07:55 -0700
        Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 12:38 -0700
          Re: Blocking RF from intentional radiators Tim Wescott <seemywebsite@myfooter.really> - 2017-02-06 14:18 -0600
            Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 14:39 -0700
              Re: Blocking RF from intentional radiators Jon Elson <jmelson@wustl.edu> - 2017-02-06 17:10 -0600
                Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 17:06 -0700
                Re: Blocking RF from intentional radiators Jasen Betts <jasen@xnet.co.nz> - 2017-02-07 04:12 +0000
              Re: Blocking RF from intentional radiators Jasen Betts <jasen@xnet.co.nz> - 2017-02-07 04:05 +0000
          Re: Blocking RF from intentional radiators Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-06 14:56 -0700
            Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 15:18 -0700
        Re: Blocking RF from intentional radiators Robert Baer <robertbaer@localnet.com> - 2017-02-08 20:41 -0800
      Re: Blocking RF from intentional radiators Robert Baer <robertbaer@localnet.com> - 2017-02-08 20:32 -0800
    Re: Blocking RF from intentional radiators Phil Allison <pallison49@gmail.com> - 2017-02-06 06:39 -0800
  Re: Blocking RF from intentional radiators John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-06 08:28 -0800
  Re: Blocking RF from intentional radiators Jeff Liebermann <jeffl@cruzio.com> - 2017-02-06 09:23 -0800
    Re: Blocking RF from intentional radiators Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-06 09:30 -0800
    Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 11:52 -0700
      Re: Blocking RF from intentional radiators Jeff Liebermann <jeffl@cruzio.com> - 2017-02-06 11:31 -0800
        Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 12:49 -0700
          Re: Blocking RF from intentional radiators John S <Sophi.2@invalid.org> - 2017-02-06 14:07 -0600
          Re: Blocking RF from intentional radiators "nuny@bid.nes" <Alien8752@gmail.com> - 2017-02-06 12:09 -0800
            Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 13:37 -0700
              Re: Blocking RF from intentional radiators "nuny@bid.nes" <Alien8752@gmail.com> - 2017-02-06 14:35 -0800
                Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 15:59 -0700
          Re: Blocking RF from intentional radiators Jeff Liebermann <jeffl@cruzio.com> - 2017-02-06 17:56 -0800
      Re: Blocking RF from intentional radiators George Herold <gherold@teachspin.com> - 2017-02-06 12:03 -0800
        Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 13:31 -0700
          Re: Blocking RF from intentional radiators George Herold <gherold@teachspin.com> - 2017-02-06 13:29 -0800
            Re: Blocking RF from intentional radiators Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-06 13:32 -0800
            Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 15:01 -0700
              Re: Blocking RF from intentional radiators Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-06 15:07 -0700
                Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 15:13 -0700
                Re: Blocking RF from intentional radiators Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-06 14:28 -0800
                Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 15:31 -0700
                Re: Blocking RF from intentional radiators Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-02-06 15:59 -0700
                Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 17:08 -0700
                Re: Blocking RF from intentional radiators pcdhobbs@gmail.com - 2017-02-08 16:36 -0800
                Re: Blocking RF from intentional radiators Clifford Heath <no.spam@please.net> - 2017-02-07 10:26 +1100
      Re: Blocking RF from intentional radiators whit3rd <whit3rd@gmail.com> - 2017-02-06 13:05 -0800
        Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 14:22 -0700
          Re: Blocking RF from intentional radiators kevin93 <kevin@whitedigs.com> - 2017-02-06 13:39 -0800
            Re: Blocking RF from intentional radiators Don Y <blockedofcourse@foo.invalid> - 2017-02-06 15:12 -0700
          Re: Blocking RF from intentional radiators whit3rd <whit3rd@gmail.com> - 2017-02-06 14:43 -0800
            Re: Blocking RF from intentional radiators "nuny@bid.nes" <Alien8752@gmail.com> - 2017-02-06 16:29 -0800
      Re: Blocking RF from intentional radiators Jasen Betts <jasen@xnet.co.nz> - 2017-02-07 04:19 +0000

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