A few of us are going to hit this wall one day, might as well get prepared for the harsh reality.

What would be the certifications required for a 5 vdc device using:
- PC power supply.
- wall adapter.(mentionned both in case there's a difference)

And then is there something concerning USB other than the glorified USB certification (personally I couldn't care less, I'm going to isolate the signal and not use the power)?

And then wired communication with another device, is there a difference depending on protocol used (RS232, I2C, etc)?

My primary interest is Canada, but USA would also be of interest to me and most likely others. I remember a Melanie thread about Europe, but that seemed like a can of worms.

Robert