RF locator.

[crazymoo]

Hi,


I am doing my final year project and i need some help.

I am doing an anti theft device where there will be several transmitters and one receiver.

Once, those transmitters go out of range, the receiver will make a sound.

I need some schematics and if possible, the whole detailed report.

One more problem is that, how do i make the receiver recognize all of the signals coming from the all the transmitters ?

[GreenGiant]

Are you seriously asking us to do the whole project for you

[Wizpic]

We can sort all that out for you but how much are you willing to pay for the work that is to be carrieed out 

sounds like a comercial project 

seriously some people just don't like work

For a minute there I thought it was April the 1st again 

[crazymoo]

nah. not asking u guys to do the whole report.


I just need to know how to make the receiver to recognize all those different transmitters ?

[lucicop]

I guess you will need to use addresses for the devices, and so you will know where the message comes from. I recommend you ICs like CC1101/CC2400 or nRF (www.nordicsemi.no) chips.

[Trishool]

Hi,

Its not like this that all the transmitters will be on all the time . The main master controller has to query every slave once at a time and check , whether the slave is there or not. It can poll all the slaves to see which is missing.


Hope this helps
TrIsHooL

[crazymoo]

The thing is the receiver is set in a way that the receiver will buzz when either one of the transmitters go out of range.

It's either i reset the receiver all the time. Any other ways to make the receiver to recognize those transmitters ?

Bandpass filter ?

[sphinx]

no i think u can make a what previous guy says use a poll system to check for all transmitters but that would be a better
idea to put a small reciever in every transmitter to chck for a attention signal and then reply "i am here" then that reciever also
would need to have a small transmitter to be able to send acknowledge signals so u can read every "transmitter" and that cycle shouldnt take too long to read one unit but this idea might be to expensive or not good at all

just a thought

/sphinx