Button network

[smainj]

Description of project :
30 button every one is  sepearate by 10 metre
the LCD display name of presed button.
this is my schema what you think ?
i wait for your comment

[MYXATA]

U1 must be master on line and must read state of buttons.

[puta]

I think some form of procedure (Protocol) may have to be used when talking on the shared media. Becuse of, if all the remote buttons talk simultaniously, then the received processor may confused of the signal. This effect may be significant when the signal is propegated over a long wires.

This is some what similar to the Ethernet in a shared media (bus), and ethernet users CSMA/CD to detect collisions and wait random period of time.

Hope this will add little value.

[alpaslan]

This is useless post without codes.
What is your aim?
Almost every one can draw this kind of dsn....
Do not send meaningless posts....

[shobits1]

I agree with puta, but i think the problem will be resolved by adding a sensor to knowledge the 16F84 before the ID of button will be sent across the MAX487, i also think adding a amplificator stage to bost the signal is good idea since the line will be up to 300m

also i agree with alpaslan about the true purpose of this scheme, by tell us what's your aim, this will help you to get quicker responce and make this post helpfull.

[smainj]

first thanks for all

@ alpaslan
My  project have tow party
Some hardware and some software
Now I'm building the hardware
If you find that my schema is functional I spend on the Softawre party
and i don't think any one can design this schema for game
(translated by google  )



Posted on: January 31, 2008, 10:33:27 22:33 - Automerged
i have used MAX487 because can drive 128 receiver for 4000ft cable

[niktesla]

Hi Ismainj,

The time I did something with your project, but actually in the system of PIC's I useu some 12f675.O pic is a master 16f628. In this small project I do not concerned with protocol for communication and this is something to start thinking because I have great interest in this type of project.
I demand it and postare you here to enjoy.


Sorry my english (By Google)


  Niktesla