I know that data can be sent over power lines through various different types of modulation - that is as far as my knowledge ends.
I have a small D.I.Y. project (a board game) that requires some form of wireless data transfer.
The range is insignificant, depending on implementation it will be either a maximum of 2cm or 30cm.
The problem is not only do I have to transmit data to the pieces (this would be simply achieved with some nrf24l01+ RF transceivers otherwise), but the data has to be modified depending on the pieces location on the board.
I intend to power the pieces via inductive charging loops. But due to the amount of power required in the pieces (5v, ~150mA (24 individually addressable RGB LED's running at a low intensity and an ATTiny)), there won't be much space left for NFC/RFID tags or possibly an IR transmitter.
As I only need to send a couple of bytes of data at a time, I was thinking I could either use an NFC/RFID module and somehow boost the power it induces.
Or more likely, to use the induction could that I plan to power the pieces with and send the data at the same time (and in the same direction as the power) with some form of modulation.
My knowledge of circuits and this sort of stuff is extremely lacking, but I'm willing to try things.
Are there any off the shelf chips or low component count circuits that will do this?
This caught my eye, but I don't have any idea whether it would work once the now modulated 5v DC signal had been converted to AC by the induction coils and then rectified back to DC at the receiving end. Also, I'm not sure whether the receiving circuitry would be significantly different or just reversed.