Dcdc USB and pico thumping noise
Hello all. I am building boat puter for music, video, etc. I have a zotac mother board and a lilliput touch screen. I have a pics power supply which runs the mother board perfectly. But because I am on a boat and will have large voltage swings I wanted to use a dcdc regulator. I purchased mini box intelligent dcdc USB regulator to supply 12 volts to the pics and the touchscreen and quad amp. The problem I am having is the Dcdc regulator is causing a heart beat thumping noise in the speakers and it doesn't stop unless I by pass the regulator.
Any other options to power the board, amp, and screen?