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Groups > comp.arch.embedded > #25736
| From | rickman <gnuarm@gmail.com> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Re: Stupid design decisions |
| Date | 2017-02-02 19:49 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <o70jvf$fus$1@dont-email.me> (permalink) |
| References | (3 earlier) <ca3a48c4-00cc-4d94-a34c-16fa09e70553@googlegroups.com> <bbf94f2b-607b-4fa0-8e7c-d0a7a59d19fa@googlegroups.com> <MPG.32fd108c56cbab7e989812@172.16.0.1> <o6v5f3$r9n$1@dont-email.me> <43c79cd9j3mcmkikno8v9n8h04mcqavbro@4ax.com> |
On 2/2/2017 5:26 PM, Robert Wessel wrote: > On Thu, 2 Feb 2017 06:35:38 -0500, rickman <gnuarm@gmail.com> wrote: > >> On 2/2/2017 4:47 AM, Paul wrote: >>> In article <bbf94f2b-607b-4fa0-8e7c-d0a7a59d19fa@googlegroups.com>, >>> jladasky@itu.edu says... >>>> >>>> On Monday, January 30, 2017 at 10:18:58 PM UTC-8, Ed Prochak wrote: >>>> >>>>> I had TWO detectors: one smoke, one CO, located about 12 feet apart >>>>> with the furnace in between and a shelf in between. And I could not >>>>> tell which was chhirping! >>>> >>>> Yes, that's a real problem that I have also experienced. The very >>>> short chirp of a smoke detector, when it echoes off a bare wall or >>>> floor (I still have acoustical "oatmeal" ceilings in my house), can be >>>> harder to locate than you might imagine. >>>> >>>> I used to have only one smoke detector in the whole house. It was easy >>>> then. When we remodeled two bathrooms, the city's code inspector came >>>> through and made us add a LOT of detectors. Including the carbon >>>> monoxide sensor, now I have nine of them! >>> >>> What they need is a latching elctromechanical like I have on some RCD >>> outlets, where by you have a small hole/window through which you >>> can view something solid which has two colour labels like Red and Green >>> so you can inspect if necessary with a torch. >>> >>> That way even if the battery has died completely it can be SEEN if >>> battery is OK or not on that unit. >>> >>> You still inspect the however many but you >>> >>> Don't have to wait for chirrup >>> >>> CAn see if battery is completely dead >>> >>> Can regularly inspect status >>> >>> If clever enough can show battery fault because someone has removed >>> the battery to satisfy inspection regimes. >>> >>> Still have chirrup to say battery going but quicker to find the actual >>> one. >> >> I think this would be a great application for a spot of eInk if they can >> make it cheaply enough. That stuff takes a bit of power to change, but >> holds its state for a long time with no power. It would only need a >> quarter inch square or maybe a simple logo showing the battery dead. A >> battery with the slashed circle over it would do I suppose. > > > There are also a number of smoke detectors that are (or can be) > Internet connected. Many of those also avoid the need for wires to > interconnect multiple detectors in a house. That's gotta jack up the price. Isn't a smoke detector still in the $20 ballpark? I guess they can put a raspberry pi zero in for only $5. -- Rick C
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Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-01-05 21:14 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-01-06 12:27 -0700
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-01-06 14:51 -0500
Re: Stupid design decisions Grant Edwards <invalid@invalid.invalid> - 2017-01-06 20:22 +0000
Re: Stupid design decisions David Brown <david.brown@hesbynett.no> - 2017-01-08 17:11 +0100
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-01-08 17:10 -0500
Re: Stupid design decisions Dimiter_Popoff <dp@tgi-sci.com> - 2017-01-09 11:30 +0200
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-01-09 04:58 -0500
Re: Stupid design decisions Dimiter_Popoff <dp@tgi-sci.com> - 2017-01-09 13:10 +0200
Re: Stupid design decisions Clive Arthur <cliveta@nowaytoday.co.uk> - 2017-01-09 11:15 +0000
Re: Stupid design decisions David Brown <david.brown@hesbynett.no> - 2017-01-09 13:48 +0100
Re: Stupid design decisions Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-08 17:40 -0500
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-01-10 21:42 -0600
Re: Stupid design decisions Tim Wescott <seemywebsite@myfooter.really> - 2017-01-06 15:33 -0600
Re: Stupid design decisions Ed Prochak <edprochak@gmail.com> - 2017-01-30 12:28 -0800
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-01-30 13:52 -0700
Re: Stupid design decisions Grant Edwards <invalid@invalid.invalid> - 2017-01-30 20:55 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-01-30 14:18 -0700
Re: Stupid design decisions Grant Edwards <invalid@invalid.invalid> - 2017-01-30 21:20 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-01-30 14:31 -0700
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-01-30 23:37 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-01-30 23:20 -0700
Re: Stupid design decisions Ed Prochak <edprochak@gmail.com> - 2017-01-30 22:29 -0800
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-01-31 02:10 -0500
Re: Stupid design decisions Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2017-01-30 22:30 +0100
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-01-31 02:00 -0500
Re: Stupid design decisions Ed Prochak <edprochak@gmail.com> - 2017-01-30 22:18 -0800
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-01-30 23:36 -0700
Re: Stupid design decisions jladasky@itu.edu - 2017-01-31 16:01 -0800
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-02 09:47 +0000
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-02-02 06:35 -0500
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-02-02 16:26 -0600
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-02-02 19:49 -0500
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-02-03 01:27 -0600
Re: Stupid design decisions Les Cargill <lcargill99@comcast.com> - 2017-02-03 07:18 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-03 10:14 -0700
Re: Stupid design decisions Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2017-02-03 10:12 -0800
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-03 14:10 -0700
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-04 11:15 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-04 13:52 -0700
Re: Stupid design decisions Grant Edwards <invalid@invalid.invalid> - 2017-02-05 04:36 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-04 21:55 -0700
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-05 21:39 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 15:55 -0700
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-05 23:38 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 21:25 -0700
Re: Stupid design decisions Les Cargill <lcargill99@comcast.com> - 2017-02-04 17:26 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-04 16:56 -0700
Re: Stupid design decisions Les Cargill <lcargill99@comcast.com> - 2017-02-03 21:40 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-03 21:48 -0700
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-04 11:03 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-04 13:00 -0700
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-02-05 01:49 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 10:43 -0700
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-05 21:31 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 15:22 -0700
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-05 23:24 +0000
Re: Stupid design decisions Grant Edwards <invalid@invalid.invalid> - 2017-02-06 03:51 +0000
Re: Stupid design decisions Paul <paul@pcserviceselectronics.co.uk> - 2017-02-06 10:11 +0000
Re: Stupid design decisions rickman <gnuarm@gmail.com> - 2017-02-06 20:07 -0500
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 21:08 -0700
Re: Stupid design decisions mac <acolvin@efunct.com> - 2017-02-04 14:42 +0000
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-02-05 02:00 -0600
Re: Stupid design decisions Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-02-05 09:11 +0000
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-02-05 03:51 -0600
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 11:10 -0700
Re: Stupid design decisions Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-02-05 22:22 +0000
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 16:01 -0700
Re: Stupid design decisions Don Y <blockedofcourse@foo.invalid> - 2017-02-05 11:03 -0700
Re: Stupid design decisions Robert Wessel <robertwessel2@yahoo.com> - 2017-01-30 23:44 -0600
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