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Harshit
 India
Indicators on Fans Printer Friendly Version
Say you are in a huge hall or a big class and 50 fans are running. You want to switch off one fan. How do you do that?? As of now, we switch off one, wait for some time till decrease in speed is noticeable and if luck is urs, that is the correct fan, otherwise, keep iterating.
Rather, there should be a bank of LEDs on the perimeter of the rim. So we just keep looking at our fan of interest, keep toggling all switches. When LEDs of the fan of interest go blind, done!!
Reward: Drop a comment saying - " Yeah, Good Idea " 

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13°

   
Strijer20
 USA
Breathalyzer key box Printer Friendly Version
A box that only unlocks when you blow into a(n) attached/detached breathalyzer.
This would let someone take all the keys of party guests and know who to let drive when they leave easily!
Reward: getting the product for free 

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68°

   
johndu
 USA
Sensored when Drive in and Park in your garage Printer Friendly Version
Set sensors over head of the house garage door and/or ceiling so that you will always park the car in desired place.
Never hit the side mirror on garage and leave space for other car.
The sensor could be a (laser) light and linked to the door opener. If the car is not driven in from the right place and parked in right place the sound warning will be issued.
Reward: No more damaged mirror and parking into my garage in ease. 

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18°

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