External power for NanoPi NEO Air?

Matthew Bennetts
Hi, 

Can the NanoPi NEO Air be powered from an external 5V PSU via the GPIO
connectors? For example, supply power via pin 4 (VDD_5)  &  pin 6 (GND)
instead of via the USB port. Looking at the schematic seems to imply that
it should be possible but I just want some confirmation.

Regards,
Matt

davef
I power the NanoPi (original) externally.  However, I have a 1A fast blow
fuse, a power supply that will not put out more than 5.0V and an external
5V6 power Zener to ground.

The NanoPi also has an on-board 5V6 Zener on the VDD_5V line. And a fuse in
series with the microUSB power.

However, the schematic for the NEO AIR (page 8 and around the Q1 area) does
not show the "on-board 5V6 Zener" or anywhere else on the VDD_5V line.

I don't see how the NEO AIR provides any protection for over-voltage. 
Perhaps, they rely on microUSB voltages never being more then spec. 

The RaspberryPi Model B+ is similar to the NanoPi so you will find comments
about external powering on their site.

davef
should have said ... the RaspberryPi Model B+ microUSB to VDD_5V circuitry
is very similar ...

Matthew Bennetts
Thanks for the feedback, much appreciated. 

BTW: I'm looking to power the NEO AIR using a LiPo and an Adafruit
PowerBoost 1000C via the GPIO port so I still have the USB OTG port
available to control a USB device, which is its self powered separately. 

Thanks again,
Matt

Mike ULO
Hi,
I would try something similar but whithout a PowerBoost.
As the card seems to work with 3.3V, someone knows which could be the
lowest usable voltage on 5V pin ? 
To use directly with Lipo or 3xNiMh cells if possible

Thanks

Mike

Matthew Bennetts
Ah, ok, will give that a go. Thanks Mike.

Regards,
Matt

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