Can we use same "Power supply' line for data transmission.
Consider hotel having 50 rooms, now for room service customer will press bell/buzzer whatever is provided.
Now for 50 rooms normally, 50 separate cables/lines will be used.
Instead of that, we can use single line through which 'signal' can be sent to reception and reception will identify which customer/room is calling?
How to do?
One way wud be use different carrier frequencies, for room1 say 10kHz, room2 15kHz,...
With frequency identification we can identify which rooms is calling.
Same concept can be used various sensors. insted of separate line for each sensor, single line (power supply) will serve transmission purpose.
Now in telephones there is pair of cables, giving say 5V dc (i'm from India and i'm not sure of voltage also.)
The same cable which gives 5V DC carries voice information.
So concept is not that new actually.
Does anybody have any idea whatsoever regarding this project/concept ?
Please reply back as soon as possible.
I'm thinkin this as my final yr project. (I'm doing graduation/bachelors in eltrx and telecommunication , its pity despite this branch, i dunno telephone line vtg.!!!! )
Anyway plz reply back.
regards,
Neil.