this is exactly what I want to do for a similar basic project. do i need to connect the arduino ground to the negative in on the meanwell or buckpuck?
My completely inexperienced thought process was that I would need some kind of 5v voltage regulator capable of handling like 4Amps (since I imagine the $4 wall-wart PSu from ebay is not regulated), some caps to smooth that, a PoT, the ATtiny85, the LEDs and something (transistor? relay? MOSFET?) that can handle controlling these LEDs other than the ATTiny85?Am I on the right track here?