I hope this question is valid for this forum. I’m not looking for you to give me a working solution, my question is of the nature where I can find literature, other learning resources, which search terms I should use and/or circuits for being able to do what I describe below.
I’m designing a system where I have a host unit and more than one receiver unit. The receiver units will be powered by an AC voltage from the host. The AC voltage specifications are somewhere around:
- Vp-p = 24 VAC
- Frequency of the AC power is between 100 kHz and 200 kHz
What I would like to do is to be able add data transmission to the AC power line. It is a requirement that I won’t be able to add individual data lines. Here is a figure describing the system:
I will have full control of the AC power source. It is not a requirement that the system runs at a fixed frequency or amplitude meaning that both frequency modulation and amplitude modulation could be used for transferring data.
The data that is going to be transferred through the system does not require high speed communication. If it is possible to transmit data at UART speeds, 9600, 19200, 38400, 57600 or 115200 baud or at I2C speeds somewhere around the same transfer rate as the UART it is enough.
I have not been able to find any other sites or resources using these specific frequencies and I realise and don't expect that I will get a solution served to me. I'm grateful if I could get recommendations on literature or webpages that covers these areas.
I’m looking for resources on how to implement data transmission on a power line, in this case a custom AC power line. Books, webpages, application notes... any resource helping me with this would be helpful.