i have so many questions about RF modules.. how to implement it and how to use it.. my questions are the following..

1. Is all RF modules with RX that have 8pins and TX that have 4 pins similar?

2. When to use encoder/decoder in RF modules?

3. If you're using PC as your transmitter is this a correct schematic for it?

4. And if you have LED MATRIX circuit for example, can you attach your receiver module to the LED MATRIX circuit to communicate with the transmitter? Just like in this schematic..

5. If you are using FSK RF module is the encoder/decoder IC will be different?

To those who can help me. Your effort will be much appreciated. =)

Thank you and Have a nice day.. ^.^

 

Link for LED MATRIX circuit
http://img543.imageshack.us/img543/7941/matrixd.jpg

Link for PC as TX
http://img688.imageshack.us/i/schematictxrx.jpg/

 

Hello,

Do you have the datasheets of the RX and TX modules?

In the remote side the MAX232 will probably not be needed.
It could even kill the 89c52 as the voltages will go also below 0 Volts.

Bertus