EM Waves: Remote Control Car

By: Cole S. and Jake E.

How RC cars work ad have evolved!

Remote control cars are a wonderful and fun toy that kids around the world love! But no one really knows how it works: radio waves! The first RC cars where made possible by the evolution of radio wave uses; the control (then big and bulky) sending radio waves to the antenna and circuit board inside the car. Early models where hard to control because the radio wave┬┤s trajectory was scattering through the air. As the technology of radio waves evolved though, the range and power of the waves going from the remote got better at finding the RC car and sending information to it, such as to steer and go. Today, the average range of RC cars is about 75 ft. to 100 ft. away, but some extreme cars can get to 800 ft. away without losing contact.

About EM Waves!

Most people know that we use radio waves to listen to, of course, radio. There are two types of radio waves, FM & AM: AM travels farther and has a longer wavelength whereas FM doesn't travel as far but is much stronger is more frequent. The radio wave wavelength is as short as 10 meters. Radio waves were discovered by Scottish mathematical physicist James Clerk Maxwell in 1867. In our Tackk, we discuss that radio waves are used in remote controlled cars and other toys, but they are also used in cars, not including the radio, through the circuit board. Scientists are on the brink of creating a device that police could use to halt suspects in their tracks. The difference between this and military EM pulse weapons is that it doesn't completely fry the inner circuits and circuit boards that the pulse devices do.

By the way, you have seen a prop of a military EM pulse device if you seen the Dark Knight Rises. (in picture below)


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