04-29-2016, 10:27 AM
(04-29-2016, 09:34 AM)rahlquist Wrote: they expect you will know how to find the stuff you need.
Or they simply didn't get the idea that powering might be a problem (typical 'hardware guy' behaviour: Using a bench PSU and AWG 20 rated short cables thinking 'what could go wrong?!'). And isn't it funny: They use a bench PSU adjusted to 5.1V but recommend 5.0V PSUs (instead of clearly saying 'get any 5.2V PSU made for Raspberry Pi since we made the same mistake as them and rely on Micro USB'): http://wiki.pine64.org/index.php/Main_Page#Power_Usage
And the problem with (Micro) USB is that focusing on the PSU isn't enough since the cable matters. When I started with this SBC stuff I also had no idea but since I started with A20 boards that already received superiour support by the linux-sunxi community back then I was able to read out the actual voltage: http://forum.lemaker.org/forum.php?mod=v...a=page%3D1
Two times the same PSU but in one case using a 'typical' Micro USB cable voltage drops below 4.6V occured with only slight loads (600 mA consumption). A64 is able to exceed 800mA easily, a few USB peripherals need another 300mA and then every 'typical' AWG28 rated USB cable will let the voltage drop below sane tresholds.