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Author Topic: Wireless methods  (Read 2972 times)

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Wireless methods
« on: April 12, 2008, 12:46:57 PM »
Hallo all forum guys!
A forum as is this is miss in internet!
The forum is wide range and has electronic, electric and maths and general very much stuff to see. And because a electronic project cannot only be make only with electronic, it needs also maths and much more. Hear can everyone find everything!

Now i have a question. What are the different of the RF, ultrasonic, infrared and WiFi as methods for remote control of things?

I appreciate really you answer! Thank you.


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Re: Wireless methods
« Reply #1 on: April 13, 2008, 15:07:06 PM »
The differences are more or less:

RF: Is transmitted with electromagnetic waves conical round an antenna. It can reach big distances and can penetrate through thin obstacles but not mountains ( ;D)

Ultrasonic: Is actually sound. It can do exactly what the sound can do. It is transmitted from a... speaker of course (made for this frequency as normal speakers will not vibrate that high). It is transmitted in sound waves all around

Infrared: It can do exactly what light can do. It is transmitted from a IR light source like IR LED. It penetrates windows but not walls, papers or non transparent surfaces. It is transmitted directionally according to the source direction.

WiFi: WiFi is a portion of RF in 2,4GHz frequency specially designed for PC communication, nothing special. It is the protocol that does all the work