289 results found displaying 118-120
   
 USA
Wind or tire powered car Printer Friendly Version
A car that is windpowered. A small wind turbin on the top or even underneath the car, maybe even in the front behind the grill. Cars are always producing wind. Maybe even a car that could be regenerated just by the spin of the tires. Of course their should be a battery that can be charged at home, or even by solar. this is such a great idea, and could easily be added on to cars.
Reward: getting the reward for free, or just let everyone know i was the first to have the idea
 

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30°

   
mrdee
 United Kingdom
Mobile phone projector Printer Friendly Version
mobile phone pojector this is an endless idea it starts with having a projector in your phone to play video and project photos onto a wall etc allso get videos sent to your phone by bluetooth or from dvd shops say small preview of films a projecttor the size of a mobile phone has already been made

This idea has already been realized

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31°

   
 USA
Magnetically Inflated Low-Mass Balloon Printer Friendly Version
Current balloon air flotation systems such as helium balloons and hot air balloons are based on buoyancy and air pressure. Helium balloons use helium that has a lower mass per volume than air and so it floats. Hot air balloons use heat to allow the side pressures of the balloon to expand the volume of the area while keeping the mass the same, therefore having higher volume per mass.
If you used the strongest relevant basic force to combat the collapsing force therefore eliminating the need for thick metal walls, you could have a system that used simple electricity to expand and contract its body and therefore increase and decrease volume, changing its buoyant force to float very quickly and precisely. With the use of a vacuum or near-vacuum would allow it to only need to be a certain size, unlike huge scientific helium balloons and also it would be robotic controlled.
How it would work is on the outside a large somewhat elastic wall that could be made of plastic or some other strong material that prevented leaking of air inward, and embedded with small magnets with one polarity going outwards and the other one going inwards. Inside of the balloon it is filled with a vacuum. In the center there is a small metal sphere that is an electromagnet that has the same polarity all around the outside and repels the walls from it strongly. Inside of the thin gap-ridden sphere would be the computer, protected from magnetic interference by a substance that has that property, which controls the balloon's size and maybe some other things.
I think the idea is new and interesting, but it might require much research which I haven't done to figure out if it would work and how it could be made to work.
Reward: a video of it working if someone gets it to work.
 

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