How can I send data for long distance without using wire?

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scorpionss22

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wireless

hi all i need your help about this things:

1- how can i send data without using wire
i want use ask or fsk or fm or am
what is the best way to send and receive data i read a project in epe magazine about using am to transmi and receive data
but they used a chip (IC) to transmit and chip (IC) to receive
but i want to build a circuit to do that so can any one help me


2- the range:
how can i send the data for long distance

thanks for cooperation
 

Re: wireless

The method you use for encoding is really up to you. It depends on the intended application.
You can use two microcontrollers of your choice to encode/ decode the data stream. I suggest you experiment with encoding/ decoding until you get it right. Once you have everything working you can actualy start using the wireless link and worry about modulation, etc.
 

Re: wireless

Depends on the amound of data and how complex you want your design to be!
µPs can help you decode and encode. If you want wireless transmition try using infrared ports transmit and receive in both directions. Then you need an RS232 interface to communicate with the µP and your small tranceiver is ready. But this good only for applications inside a room ar with the neighboor in next building in the best case.
Hope I helped a bit,
D.
 

wireless

thanks all
but i want transmitter and receiver made of components not ic like in epe magazine
 

Re: wireless

see this site: https://www.sparkfun.com
they sell the RF modules at 2.4GHZ from laipac canada and you can communicate at 1Mbps.

I think if you are new in RF it is better to use ready modules and test them ,you can also do your projects with them.
 

Re: wireless

For the IR data link, i made a project long time ago using microcontroller encoding, if anyone is interesting with it, then i can share with you..

Concerning the mentioned EPE Magazine... I don't know where can i get it, can anyone tell me how can i get a soft copy of it??
 

Re: wireless


Alhamdulillah, I could get nearly all volumes of EPE from 2001 to 2005...
Thank you all..

rituparnasaikia said:
You can do that using MAX1472(Data transmitter) and MAX1473(data receiver)
Click to expand...

I hope you can help to implement such data Tx/Rx using discrete components..

Thanks in advance,
Ahmad,
 

Re: wireless

i require the EPE magzine soft copy can any one provide.
 

wireless

I think you should choose transceiver IC because you no need to conside many things such as noise, distance etc.

I you readly need to make by yourself, i think you can use MCU for encoding the FSK. afterthat you just generate RF when data = 1, and do not genarate when data = 0. So reciever side only detect RF frequency have or not.
 

Re: wireless

Hi,

It's better to use FM or FSK.

Simplex, half or full duplex communication depends on your application and budget.


Roger
 

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