Microwaves

Bluetooth technology is intended to replace fixed cables and devices with a secure wireless system. Its frequency is between 2.400 and 2.485GHz. Most Bluetooth technology has a maximum range of 30ft. The Nintendo Wiimote uses Bluetooth technology to connect to the game system, but it can also connect to other pieces of technology. To be able to connect your computer to a Wiimote, you have to have a Bluetooth adapter installed. One of the easiest ways to connect the Wiimote is with BlueSoleil software which can be downloaded from their website: http://www.bluesoleil.com/download/index.asp There are in depth instructions on how to connect your Wiimote on this website: http://www.instructables.com/id/How-To-Connect-your-Wiimote-to-your-PC-via-Blueto/ This page can help you know if your computer is compatible: http://www.wiili.org/index.php/Compatible_Bluetooth_Devices

Radar uses microwave radiation to detect the range, speed, and other characteristics of remote objects. Development of radar was accelerated during World War II due to its great military utility. Now radar is widely used for applications such as air traffic control, navigation of ships, and speed limit enforcement. -Lawrence Dwight from wikipedia.

This video shows you how to make your own radar gun for cheap!! media type="youtube" key="BvG0k5bSRgg" height="344" width="425"