05-06-2016, 04:24 PM
(04-02-2016, 12:18 AM)Andrew2 Wrote:(04-01-2016, 09:32 PM)Zoidiano0 Wrote: More like volts u need amps
100% wrong. The power problems most Pine users suffer from are related to voltage drops below a certain treshold.
Before you start telling funny stories please use the test points on the board to measure voltages and a powermeter to monitor consumption. Unless you add a lot of power hungry peripherals you will have a hard time to get the Pine consuming more than 1.5A.
You can use really demaning workloads that make use of heavily optimised code and compiler switches and you will need ACTIVE COOLING to exceed 2A (BTDT: be aware that some of the conclusions in this post are still to be verified or wrong) and will then need to power the Pine64 through the Euler connector.
The problem with Micro USB used for DC-IN is that the tiny contacts prevent providing more than 1.8A (by specs!) and that most if not all USB cables Pine64 backers use are simply crap to power a board (resistance too high).
Finally: Power ratings written on a PSU are also pretty worthless since the problem are still voltage drops and most higher rated PSUs show identical behaviour: In case you really increase consumption and would need the amps the PSU is rated for, the voltage drops below a treshold and the board will power down.
Everything well known since years (since the Raspberry Pi foundation unfortunately decided to use this crap Micro USB connector for DC-IN on the Raspberry Pi) and just here another example for the very same problem nearly all users are facing without knowing it since they believe in "more like volts u need amps" and similar nonsense: https://www.loverpi.com/blogs/news/93532...comparison
The Micro USB connector especially for the Pine64 makes no sense as a design choice. The MAX the adapter can supply is 1.8 yet the board requires 2.0. Not sure which school of design the designers went to but I was always taught if it requires 1 design for 1.3 to 1.5. There are so many wall pods that can provide good stable power with the regular round connector and center pin, this micro USB makes no sense.
