HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Product News
Electronics & Test

Teardown: Inside Nest Labs' Nest Protect

iFixit.com
12/11/2013  
13 comments
NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
Page 1/2  >  >>
Cabe Atwell
User Rank
Blogger
Re: Innovative
Cabe Atwell   5/5/2014 11:24:47 PM
NO RATINGS
@ armorris: indeed, the mechanism and simple data storage that coincides with the 'alert' tone is incredibly small and easy to incorporate.

AnandY
User Rank
Gold
Re: Innovative
AnandY   12/30/2013 1:22:36 PM
NO RATINGS
I think the combination of the photoelectric smoke sensor and the heat and humidity sensors within the same device is a great idea. We have all had false alarms where the alarm goes off simply because it detects smoke even where there isn't any fire. Adding in the heat sensor should tell the device whether the smoke is cause by a fire or not.

kenish
User Rank
Platinum
Read the website....
kenish   12/16/2013 2:17:11 PM
NO RATINGS
Many of the great comments here are answered by a quick read of the Nest website (audible alert, nightlight, battery warning, etc).

BTW, an audible low battery warning is legally required for all smoke/CO detectors sold in the US and presumably everywhere else.

The suggested "features" are interesting...but keep in mind that safety-critical products have to ensure that the basic function works (or detects a failure) despite failure of components, user mistakes, or intentional tampering.  Software QA is extremely rigorous so adding "features" adds to the analysis task.  (Mute-by-time requires a clock...what if the time is wrong...even setting PM vs. AM could be disasterous!  How would the unit detect this?  How can consumers who can't be relied upon to renew the batteries be trusted to set and monitor the clock and change the time in the spring and fall?)

armorris
User Rank
Platinum
Re: good replacement
armorris   12/12/2013 3:50:33 PM
NO RATINGS
As sophisticated as it is, how do you know that it doesn't alert you when the battery needs to be replaced? It would be extremely easy to do with what's already there.

William K.
User Rank
Platinum
A major step im performance here.
William K.   12/12/2013 10:32:01 AM
NO RATINGS
This detector is certainly a major step in both performance and complexity. Most of the consumer grade detectors appear to be designed with a goal of an absolute minimum of components and general expense. This one is orders of magnitude more complex.

While I don't see much reason for including a night-light function, I really like the amr-waving motion dtector for activating the temporary switch off. As a note, an automated switch off based on anything would be extremely unsafe, since it would have no means of determining that a particular activation was not a real fire. Arm waving to fan smoke away is something that indicates a human decision has been made that the situation is not a fire in progress. So it is a very good add-on. 

That coating of the electronics is probably intended mostly to protect the package from the conductive dirt film that builds up on some ceiling mounted detectors.

Stephen
User Rank
Gold
Re: good replacement
Stephen   12/12/2013 9:37:02 AM
NO RATINGS
There is a simple solution, one the Nest Protect uses: photoelectric not ionization smoke detection. The photoelectrics are less false alarm prone.

radio-active
User Rank
Iron
Re: good replacement
radio-active   12/12/2013 9:17:42 AM
NO RATINGS
Ideally, this thing would have voice recognition, you could say "alarm mute" and it would silence for 20 minutes until the cooking smoke cleared. Or a smart phone app that would mute it for you at the touch of a button. A lot of people can't reach the device to silence or remove it without getting on a step stool. The arm waving thing seems silly...

patb2009
User Rank
Gold
Re: good replacement
patb2009   12/12/2013 12:15:38 AM
NO RATINGS
perhaps some software to program against false alarms, 

if it can recognize certain times of day it gets a false alarm, and 

starts suppressing during that time, while turning up the others

or sending a text msg, saying "Alarm suppressed by logic", approve?

 

 

Charles Murray
User Rank
Blogger
Re: good replacement
Charles Murray   12/11/2013 6:57:02 PM
NO RATINGS
I'd like to have a nickel for all the people who've had the problem you describe, naperlou. Seems like there should be a simple solution.

Nancy Golden
User Rank
Platinum
Re: good replacement
Nancy Golden   12/11/2013 4:24:57 PM
NO RATINGS
I agree naperlou - just add some code. Maybe have two different frequencies for the alarm or a pulse versus a tone. They might need a HW mod like an additional chip for the battery level autodetect but I think it would be well worth it. I hate not knowing how close my smoke alarms are to not being effective.

Page 1/2  >  >>
Partner Zone
Latest Analysis
Advertised as the "Most Powerful Tablet Under $100," the Kindle Fire HD 6 was too tempting for the team at iFixit to pass up. Join us to find out if inexpensive means cheap, irreparable, or just down right economical. It's teardown time!
The first photos made with a 3D-printed telescope are here and they're not as fuzzy as you might expect. A team from the University of Sheffield beat NASA to the goal. The photos of the Moon were made with a reflecting telescope that cost the research team 100 to make (about $161 US).
At Medical Design & Manufacturing Midwest, Joe Wascow told Design News how Optimal Design prototyped a machine that captures the wing-beat of a duck.
The increased adoption of wireless technology for mission-critical applications has revved up the global market for dynamic electronic general purpose (GP) test equipment. As the link between cloud networks and devices -- smartphones, tablets, and notebooks -- results in more complex devices under test, the demand for radio frequency test equipment is starting to intensify.
Much of the research on lithium-ion batteries is focused on how to make the batteries charge more quickly and last longer than they currently do, work that would significantly improve the experience of mobile device users, as well EV and hybrid car drivers. Researchers in Singapore have come up with what seems like the best solution so far -- a battery that can recharge itself in mere minutes and has a potential lifespan of 20 years.
More:Blogs|News
Design News Webinar Series
10/7/2014 8:00 a.m. California / 11:00 a.m. New York
9/25/2014 11:00 a.m. California / 2:00 p.m. New York
9/10/2014 11:00 a.m. California / 2:00 p.m. New York
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 20 - 24, How to Design & Build an Embedded Web Server: An Embedded TCP/IP Tutorial
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: 10/28-10/30 11:00 AM
Sponsored by Stratasys
Next Class: 10/28-10/30 2:00 PM
Sponsored by Gates Corporation
Next Class: 11/11-11/13 2:00 PM
Sponsored by Littelfuse
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service