You might study how the commercial X-10 system sends data signals through the household power wiring. Briefly, short bursts of high frequency audio signals encoding digital data are sent at the 50/60Hz AC zero crossing intervals.
You might study how the commercial X-10 system sends data signals through the household power wiring. Briefly, short bursts of high frequency audio signals encoding digital data are sent at the 50/60Hz AC zero crossing intervals.