I'm working with some Power-Line Communication modules. Here is an example of the sort of module I'm talking about: store.rakwireless.com/.../lx200v50-evb-power-line-communicationplc-module
These would be using the same technology as you would find in the more common consumer type adaptors, such as TP-Link's offerings: https://www.tp-link.com/uk/home-networking/powerline/tl-wpa7517-kit/
These all work remarkably well and I am surprised I haven't seen more people using this communication technology on Element14 projects because if your start digging around online you find instruction on how to develop something from the ground up. For example, all the main players have devoted time developing EV kits etc. For example STM:
It's all very clever.
Anyway, from what I can work out, there are two key design challenges to get things going. The first is clearing out or suppressing EMI noise on the power cables and the second is measuring zero crossing. Both have their challenges.
It is the first area, I am focusing on here.
I found this video, amongst many others that give guidance but it is a minefield for the novice trying to work out the essential versus the over-engineering.
So I thought to open this up to the community as I could not find much on the element14 website about EMI filtering design and tips n tricks etc.
For example, what is a good (jellybean-standard) choke to use for the suppression of common noise from AC/DC circuit... These circuits often also include safety capacitors (as indicated in the above video) but some would also use resistors and inductors on the AC lines.