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Edited by Tina at 2017-3-15 15:12
The biggest problem with power supplies is that you need a stable 5V output. Many phone power supplies do not have a stabilized output, this results that the voltage drops below 5V, even that they are rated eg. 5V2A. That makes it a bit complicated to choose the 'right' power supply.
I use a 6 port USB power supply rated 5V8A. This works fine with my OPI PC. Other users reported that PSP power supplies work. I did try a Chinese copy of a PSP power supply and that will not boot, even that it gives a voltage of 5.18V measured at the 5V rail (GPIO). After testing it with a adjustable power resistor I found out that it delivers only 0.324A. So that is one example of any 'fake' power supplies. My OPI PC works too with a lab power supply adjusted to 5.00V output.
The problem with many power supplies offered on Aliexpress is that many do not live up to the specs. Eg. you order a 5V2A wall charger (power supply) and after it arrives you find out that it cannot deliver the 2A. I did open one of those and found out that the components only can do 0.5A (500mA).
I would not buy a power supply of Xunlong (official OPI shop) at Aliexpress, as he gives NO WARRANTY on any of his products! We are still waiting on a response of them to the warranty subject... |
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