Constant current power supplies

Using Arduino General Electronics
8

I don't see the point.

  1. Arduino is designed to be connected to a constant voltage power supply.
  2. Constant voltage power supplies are equally common and cheap.

Essentially, you're buying "wall wart guts", but not the type that Arduino was designed for...

You can add that a supply designed for LED lighting may not provide isolation from the house power wiring, making it suitable for self-contained lamps of various sorts, but NOT for an experimental device like an Arduino with exposed wiring that you poke your fingers at.

Also, cheap Chinese import power supplies (of all types) are getting significant publicity recently for being poorly designed, lacking safety certifications (and in fact having poor safety design aspects that would make it impossible to get safety certifications), and having very questionable performance (poor regulation, high ripple, etc) For example Crappy PSU analysis - YouTube