I'd like to do a small project (xmas light controller) using 120VAC. I've tried searching for guidelines / rules / do's and don'ts but searching on "ac design" doesn't return what I'm looking for.
From reading here and looking at other similar designs, it seems like best practice is:
* On/off switch on "hot" side of AC.
* Inline fuses on hot side (I was thinking one per each outlet / string).
* Optical isolators between triacs and digital part of controller.
Can I use a plastic project box, or should I do metal, and ground the case? I was thinking about using terminal strips inside the box to distribute the AC power to the outlets, is that safe? Stuff like this.
Any hints / tips / suggestions for safe design much appreciated.
From reading here and looking at other similar designs, it seems like best practice is:
* On/off switch on "hot" side of AC.
* Inline fuses on hot side (I was thinking one per each outlet / string).
* Optical isolators between triacs and digital part of controller.
Can I use a plastic project box, or should I do metal, and ground the case? I was thinking about using terminal strips inside the box to distribute the AC power to the outlets, is that safe? Stuff like this.
Any hints / tips / suggestions for safe design much appreciated.