开云体育

After a lot of fussing with questionable USB cables and less than 4.8 volts at the far end of the cable I bought one of the little 3 amp Adjustable buck converters off ebay, adjusted the output to 5.3 volts and wired it directly to the USB 3.0 hub circuit board. ?No more loose or questionable connections or low voltage creating strange problems. ?I was particularly interested in RFI interference and was prepared to put add an external filter on the output but measuring the output noise with a scope showed about 2 millivolts of high frequency noise, non that interfered with the raspberry pi however I will put a copper shield around the buck converter and include an RFI filter for peace of mind. ? ? ? ?

There are a lot of high voltage to low voltage 3 amp buck converters on ebay, for 2.50 to 3.50 USD, just pick one that has a pot to adjust the output voltage down to 5 volts. ??

This is the one I use but there is another when available that includes a digital voltage readout that I prefer but was not available recently.

https://www.ebay.com/itm/125104160678

Thats very unfortunate but I have 3 of the power boards running for 3 years and 1 year without any issues and 3 more recently installed in remote controlled astronomy gear. ??

When in doubt I use the Anker Powerline cords. They provide a much larger set of power conductors and significantly lower power line loss.