Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
No serviceable parts inside.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.

user:
pass:
register,


         

Please log in.
Before you can vote, you need to register. Please log in or create an account.

Reverse Night light

bulb that only comes on when detecting a source of light
  (+3)
(+3)
  [vote for,
against]

I have an older house that has bulbs in the basement unfortunately they are of the pull string variety meaning a trip to the basement requires pulling 4 strings then pulling them again in reverse order to prevent being stuck at the far side of the room and having to stumble around in the dark.

I propose a lightbulb much like a night light or automated streetlight. BUT instead of turning on when it gets dark it looks for the presence of light in the spectrum produced by a light bulb and turns on when that one turns on. Hence if you walk into a basement you can turn on one light and they would all turn on. simple logic would look for a big burst, (light turning on instantly) instead of say the sun coming up. Great for additions or retrofitting where tying one additional lightbulb into a circuit would be extremely taxing.

alternatively you could use power analysis (see link) to achieve the same effect.

metarinka, Dec 13 2010

Power analysis http://en.wikipedia...wiki/Power_analysis
monitoring line voltage for specific characteristics [metarinka, Dec 13 2010]

Remote control lampholder http://www.homeeasy...05S/190/Product/61/
Just one example of many. [8th of 7, Dec 13 2010]

[link]






       Studio photographers have slave flashes that detect the camera flash and fire along with it.
baconbrain, Dec 13 2010
  

       RF-controlled aftermarket lamp sockets ?   

       <link>
8th of 7, Dec 13 2010
  
      
[annotate]
  


 

back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle