cable tv addressable box

[tishri]

hey guys,,
i need your advice how could i possibly make an addressable box using pic..
its expected number of devices is 100thousand

my first plan is to transmit rf signal
like:
transmit ----> 1 ON
100000 ON
999 OFF

those devices that recives that code will be turned off or on based on the command sent.

just give me idea if its possible using pic.. and how could i merge the signal from PIC to cable tv signal .. thanks

[sayzer]

Hi, Gimo

That's not sample you request, but a complete application ...

How much do you offer ???

Alain

http://www.picbasic.co.uk/forum/show...4062#post44062



As Alain asked in another post, let me ask the same question here.

How much do you offer?


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[tishri]

im just asking if this can be done using PIC... im not asking how to do it. im not also asking the schematics diagram or the source code ..

really, i just want to know if this is possible using Programmable IC's .. im just wondering.. if this is possible then maybe we could talk about the price.

[tishri]

i never thought that this forum is always talking about money... i wouldn't ask this question if i'm a pro. most of the questions raised here are school projects. so why talk so much about money.. pro's don't go to forums like this.

You know what guys im also a member of sql team forum and some visual basic forums. there we dont ask for money.. we help each other....

[sayzer]

Sure it is possible.

For example:

Assuming you have a very clear RF channel.
Say you have 100 units. Make them slave.
These slave units (devices) will be on listening mode on the channel.

Each unit will have a PIC , say 16F628A. Each PIC will have an ID number. Say ID = 1 to 100.
You will also have a master PIC and your master PIC will be the controller and sending the signal to the RF channel with two bytes.

First byte is the ID number.
Second byte is the mode ; either ON mode or OFF mode. Say Mode = 1 is ON, and Mode = 0 is the OFF mode.

When your controller sends the signal as
[ID,Mode]
then all of your PICs will check if the ID is their assigned ID.
When one of the slave PICs matches the ID then this slave PIC will take a look at the MODE.

IF the Mode is 1 then PIC will turn ON something.
IF the Mode is 0 then PIC will turn OFF something.


Is it clear enough so far?
All is free.

[tishri]

yes, its very clear, thanks
i just don't get the idea why you guys keep on asking for money..

well..,, i've got few more question ..

how about the possibility of combining it with video, audio, and signal that controls the turning off and on of the devices. Is this possible? does this affects the video or audio signal? and one more thing.. For you, how hard is it to build a project like this? [very easy,easy, hard, very hard]

thanks again .. hope its free coz this are just questions not complete applications..!!!