[mythtv-users] LIVA frontend .. one last question

[Michael Watson]

On 2/04/2015 7:52 AM, Dave MythTV wrote:
>
>
> On Sun, Mar 29, 2015 at 5:36 PM, Michael Watson 
> <michael at thewatsonfamily.id.au <mailto:michael at thewatsonfamily.id.au>> 
> wrote:
>
>     On 30/03/2015 7:04 AM, Damian wrote:
>
>
>         Oh, and is there any reason why I shouldn't order one from the
>         USA (for UK use)? I'm asking in terms of the power supply. I
>         don't want to buy it and then fry it!
>
>     With the appropriate adapter it should work fine, but any 2Amp
>     Micro USB Power supply/charger should do fine.
>
>
>
> Note that the LIVA ships with a 5V 3A power adapter, so a common 2A 
> USB charger or power adapter would be undersized.
>
> The LIVA will boot and operate seemingly fine on a 2A power adapter, 
> but it doesn't provide enough current to fully power the LIVA and both 
> internal USB ports.   You may be OK if you use a powered USB hub for 
> your peripherals, but even so, with how low quality many of the 
> generic 2A chargers are, I'm not sure I'd trust them running 24/7 at 
> or near their rated max output...
>
> - Dave
>
>
Typical.  Ignore the specifications when it suits them.  I hope the 
adapter comes with the USB cable attached, so one can only use the 
supplied Cable + Adapter.  3A @ 5V down the tiny cables within most usb 
cables is a recipe for problems...

"In July 2012, the USB Promoters Group announced the finalization of the 
USB Power Delivery ("PD") specification, an extension that specifies 
using certified "PD aware" USB cables with standard USB type A and B 
connectors to deliver increased power to devices with larger energy 
demand. Devices can request higher currents and supply voltages from 
compliant hosts – up to 2 A at 5 V (for a power consumption of up to 
10 W), and optionally up to 3 A or 5 A at either 12 V (36 W or 60 W) or 
20 V (60 W or 100 W).^[95] 
<http://en.wikipedia.org/wiki/USB#cite_note-101> In all cases, both 
host-to-device and device-to-host configurations are supported"
>
>
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