wireless help

elsalam alykom,

i have a project "wireless security door lock"
i a part of this project i need to transmit the data to a reciever then to the
controller.

if any one know a soln plz tell me .

thanks in advance

Depending on the range you could use bluetooth or IR transceiver...
For bluetooth check out the book:

rapidshare.de/files/26877891/Mcgraw-Hill_-_Bluetooth_Demystified_MAZ.pdf.html

i knew the blue tooth is 10-20 m distance .

can i use another soln to enlarge the distance?,

i hope it be unlimited!!!!!

thanks alot

Unlimited?!?!
You are looking for some sort of Sattelite communications for the door lock security system :D !!

I think that the 10 to 20 meters distance is ultimate for your case!
And you may use 433MHz Tx and Rx modules for that, as you don't need high data rate for transimission, or try to build your own ASK or FSK (ASK is easier) Tx and Rx modules using either ICs or discrete components,

Regards,
Ahmad,

On the other hand, I know guys who did 3 km long Bluetooth link working! :D