What connectors would you like on the P2?


Sorry If I'm wrong* but I still don't know of any standard whereby the slave USB device can power the host i.e.


you cannot charge a pandora (or suchlike) using the full-size USB A port


hosts (with A sockets or B plugs) source power


slaves (with B sockets or A plugs) sink it


the exception is miniAB which can act as either host or slave depending on weather you use a miniA or miniB plug


*I was! See below - there are new fancy ways to do it :)
 
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Binky said:
Sorry If I'm wrong but I still don't know of any standard whereby the slave USB device can power the host i.e.


you cannot charge a pandora (or suchlike) using the full-size USB A port


hosts (with A sockets or B plugs) source power


slaves (with B sockets or A plugs) sink it


the exception is miniAB which can act as either host or slave depending on weather you use a miniA or miniB plug
Click to expand...

Did you check out the link I gave you on the new Power Delivery Spec? That's supposed to allow power transfer in both directions. Since you mentioned high current I thought you were referring to it originally (but we're talking really high current capability here, up to 100W, which of course Pandora 2 would come nowhere close to touching) No idea if it's in any way realistic to support this spec in Pandora 2.
 
Exophase said:
Binky said:
Sorry If I'm wrong but I still don't know of any standard whereby the slave USB device can power the host i.e.


you cannot charge a pandora (or suchlike) using the full-size USB A port


hosts (with A sockets or B plugs) source power


slaves (with B sockets or A plugs) sink it


the exception is miniAB which can act as either host or slave depending on weather you use a miniA or miniB plug
Click to expand...

Did you check out the link I gave you on the new Power Delivery Spec? That's supposed to allow power transfer in both directions. Since you mentioned high current I thought you were referring to it originally (but we're talking really high current capability here, up to 100W, which of course Pandora 2 would come nowhere close to touching) No idea if it's in any way realistic to support this spec in Pandora 2.
Click to expand...

Ah I missed the the bidirectional part there :unsure:


If We are using a USB port to charge, I'd like two of them


Unless powered USB hubs with upstream charging become common
 
Binky said:
Sorry If I'm wrong but I still don't know of any standard whereby the slave USB device can power the host i.e.


you cannot charge a pandora (or suchlike) using the full-size USB A port


hosts (with A sockets or B plugs) source power


slaves (with B sockets or A plugs) sink it


the exception is miniAB which can act as either host or slave depending on weather you use a miniA or miniB plug
Click to expand...

If you're talking about my post, i've just fixed it so that it reflects what I actually meant to say. :)
 
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What kind of USB port is on the Google Nexus 7? It is being used to charge, as a USB device port AND has been used as a USB host port. I saw an article where a guy had keyboard, mouse, etc and linux loaded and running on the thing all through that port.

Binky said:
Sorry If I'm wrong* but I still don't know of any standard whereby the slave USB device can power the host i.e.


you cannot charge a pandora (or suchlike) using the full-size USB A port


hosts (with A sockets or B plugs) source power


slaves (with B sockets or A plugs) sink it


the exception is miniAB which can act as either host or slave depending on weather you use a miniA or miniB plug


*I was! See below - there are new fancy ways to do it :)
Click to expand...

You know. Thinking about it. I'm fine with us keeping the miniA/B port - but declaring our own high-amp charge draw spec for it when plugged into a high amp charger. Keeps it just different enough.


Cables aren't really a problem - check monoprice for them.
 
Grench said:
Cables aren't really a problem - check monoprice for them.
Click to expand...

They don't seem to have mini-A connectors.


I suggest:


2 * full USB A - socket use these for high-current charging when/if new USB power standards become common


1 * mini USB-B - use this for low current charging, and use as USB slave


Don't use micro-AB OTG because the connectors are too weak


Don't use mini-AB because its discontinued
 
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  • 2x SDXC (full-size)
  • 1x microSD (internal)
  • 3.5mm headphone
  • 1 x full size USB 1.0/1.1 + USB 2.0 host port (i.e. with two controllers).
  • I don't care all that much about USB 3.0, but do not oppose it. Direct support for 1.0/1.1 devices is more important.
  • 1 x mini or micro USB slave port (charging, mass storage device, etc...)
  • 1 x HDMI (DVI-D is also acceptable, but makes less sense)
 
I found the solution to the USB question.


http://en.wikipedia.org/wiki/File:USB_3.0_Micro_B_plug.PNG


It is a composite micro plug. I saw one on the last USB 3.0 card reader I bought but had thought it must be some proprietary nonsense.


One side is a USB 2 micro port. The other is the extended pins for USB 3.0.


Put in one USB 3.0 Micro and one USB 3.0 A. Good picture of them here:


http://en.wikipedia.org/wiki/Usb_3.0


That brings us up to 'modern times' on the USB ports.


Edit: Oh - and the USB 3.0 micro B port winds up being much more robust than a standard micro B port - much more stability.


Edit2: A great picture of a normal USB 3.0 A to micro B device cable.


http://www.amazon.com/BYTECC-39-37-Micro-Cable-USB3-1M-A/dp/B003ENECI6
 
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Exophase said:
Binky said:
Sorry If I'm wrong but I still don't know of any standard whereby the slave USB device can power the host i.e.


you cannot charge a pandora (or suchlike) using the full-size USB A port


hosts (with A sockets or B plugs) source power


slaves (with B sockets or A plugs) sink it


the exception is miniAB which can act as either host or slave depending on weather you use a miniA or miniB plug
Click to expand...

Did you check out the link I gave you on the new Power Delivery Spec? That's supposed to allow power transfer in both directions. Since you mentioned high current I thought you were referring to it originally (but we're talking really high current capability here, up to 100W, which of course Pandora 2 would come nowhere close to touching) No idea if it's in any way realistic to support this spec in Pandora 2.
Click to expand...

I want a caradaptor, so I can charge my car battery with my Pandora!
 
Ok, now you're just being silly. Can we get back to discussing miniSD cards now?
 
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