rf 433mhz and avr

hi firends,

as usual i am here for some basic questions, i want to link a rf remote control to my existing project... and i have tried to Google "RF MHz" and lots of other queries for the purpose... but couldn't get the very basic answers to questions that arose in my mind....

do any one have a basic tutorial or link to it for this purpose?

my needs are a system capable of learning a number of remotes,
the remote just provides a pulse on the relevant pin,
2 channel

what i need help on is....

1 what would be the best approach?[ using decoder chips or uc]
2. how do i link the remotes,[software]
3.is it that i need to use the Rx TX module and connect it to avr's Rx/TX and use the data from udr register, ... or are there any intermediate stages, specially in Manchester coding and decoding....

sorry for asking some weired questions but thats how i am going to understand it...

 

thanks steve...
i have to make a new start so, i would biuld the remote as well, keeping this in mind, now what will you suggest which way should i go, for coders and decoders? or uC ...
what are the Pros and Cons .... and how to go ahead and start for a newbie....

 

ok, i had some reading
but still have some issues?

do i have to give each transmitter a unique adress? answer seems to be yes, so this has to be done in software?.....
and how would i make the reciever be programed for a specific remote/transmitter... should it be like that when the learn/program button is pressed the reciever recieves the code that is transmitted by the transmitter and saves the code[fixed code] in eeprom? and then after word respond to that remote only?

and for adding another remote simmilar procedure is done but now durring validation the reciever compares code with all stored codes and after that it validates it or make it in valid?


basically i need the algorithm for such remote.... can any one help me regarding that ...? as far as the modules are considered i dont have problems in them.... they are just a link... other than that the whole algorithm of using multiple remotes and their addressing that is required...


sorry for being so confusing.....

 

each transmitter has two channels,,, and all remotes have same functions

ok.. just have the application in mind..

you would have seen automatic gates that require remote controls... now there are several gates so diffrent gates work with different address so taht they can be differenciated by the recievers... and even some gate have more than 1 remote so that a number of users can have thier own....

 

No, i have to make a remote , just like a normal rf link...

probably i made confusion by using the word "lock"

so i have a two channel remote system [receiver / transmitter].. by having some study i got the idea .. i have to use a micro controller and a 433MHz module for Rx and Tx
and to make the remote work with its own receiver we use fixed code.. so that the reciever doesnt react to other signals...

thats OK for working with just dedicated pairs[ specific transmitter for spec. receiver] but as you know for gates more than 1 remote are used for the same receiver... for that what we have to do? we have to add the addresses of all remotes to the receiver so that when any RF signal is received the receiver instead of checking just one address matches it with all available addresses that are stored and if any one matches it considers it a valid one