I am new to Arduino and electronics in general.
I am working on a project where I would ultimately like to power the project from 220V AC (Wall light switch) (I want to replace the light switch with one of my own design).
I will want to feed power to the arduino directly from the 220V connecting wires in the light switch cavity.
This power source is 5V (I know the Arduino needs 9-12V), but I will use a USB connector, wired onto my AC/DC power source, to power the Arduino.
AC85 - 264V or DC110 - 370V wide voltage input DC 5V(+/ -0.2V) 600mA isolated output Input Current: 0.0273A/115VAC 0.014A/230VAC Input surge current: 20A (230VAC) Frequency range: 50/60 Hz Operating Temperature: -30 - 70 ℃ Relative humidity: 20%- 90% Rated power: 3W Output efficiency: 80%
I don't really know why yet (this is part of figuring that out), but I have the feeling that the arduino would want a linear power source, rather than a switching power source. (Because linear is cleaner power?)
Regardless, I am asking the question as if this power source will do the job, and if not, why not? (Why not a switching PSU) ?