doubt

Thread Starter

whale

Joined Dec 21, 2008
111
i want to build a wireless circuit, the distance between transmitter and recever is about 50 feet.
which freequency can i choose for communication .
 

hgmjr

Joined Jan 28, 2005
9,029
You may want to consider off-the-shelf receiver and transmitter modules. They come in several frequencies (i.e. 433 MHz, 915 MHz). You can check out the wireless remote modules at www.rentron.com.

hgmjr
 

Thread Starter

whale

Joined Dec 21, 2008
111
what is shelf receiver?
in fact i'm going to build the transmitter and receiver circuit after knowing the exact freequency
 

hgmjr

Joined Jan 28, 2005
9,029
This is a link to the rf wireless page at rentron's website.

Off-the-shelf is just a term used to refer to predesigned modules.

hgmjr
 

mik3

Joined Feb 4, 2008
4,846
You have to use a frequency which is not used by other things (radio stations etc) as not to cause interference between their signals and your signals. I think 27 MHz will be fine because it is a frequency used in toy remote control cars.
 

Thread Starter

whale

Joined Dec 21, 2008
111
sir,is there any table for distance and freequency,
is that wavelength is related to it?
 

mik3

Joined Feb 4, 2008
4,846
I don't know much about telecommunications but i know that waves travel better in some materials at some particular frequencies. Now, if you want to transmit signals more far you have to increase the power of the transmitter.
 

Thread Starter

whale

Joined Dec 21, 2008
111
thank you....friend(just now i saw your profile)
see you later
 
Top