Hello again! I have purchased the 5v buck converter and used the onboard potentiometer to bring the 12v 800ma power supply down to 5.3v...
I connected everything, (after burning through an Arduino and 3 of the 5 buck converters) but the Arduino fails to boot, along with everything else connected to the new 5.4 volt power supply...
The fried Arduino powers up (onboard LEDs) when connected to the 5.3v source and ground coming from the buck converter, but nothing else.
What is going on here? Should I raise the voltage slightly?
(5.4v confirmed with a multimeter.)
link to buck converter: