LogicalUnit
Still Fresh
- Joined
- May 12, 2012
- Messages
- 19
Great to hear that all the known bugs have been fixed. Can't wait for the prototypes to start going out!! 
Last known issue fixed
- Thread starter EvilDragon
- Start date
Are you sure letting the voltage drop to 3.7 V is safe? or could we end up melting some USB cables with that? (dunno anything about power, but I've melted some ATX PSU cables by drawing too much..)
Also, what if I have USB cables that deliver less than 3.7 V normally? (they're very long...)
My experience with bottom-quality USB cables is that they tend to fail safely by just not working. Either the wire melts at a thin spot, or they break due to mechanical stress.
I managed to end up once with a pack of 40 or so USB cables that came free with some off-brand arduino boards. After attempting to use them on a device drawing 300mA, I got a 20% failure rate, but no fires or melty messes.
Either way, the answer is to buy some decent-quality (and appropriately rated) cables.
It picks one, the charger chip only has one AC input.
That won't even be enough for the OMAP5
Yes, every other modern device does that as well - otherwise you wouldn't be able to charge or use it properly.
Also, what if I have USB cables that deliver less than 3.7 V normally? (they're very long...)
Then the Pyra will crash - unless you have a battery in there.
ssokolow
Member
AC ? Does it mean Alternate Current ? I thought USB was DC.
Well, it alternates between 3.7 and 4.x V depending on the cable, it seems
Congratulations for finding the solution. .
I'm also lost regarding the tests with 4GB RAM. Any progress there ?
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Neelix
Insecticidal Maniac
It's a common practice to refer to the external power port of an electronic device as an AC input even if the device itself takes DC.
The idea being that it's ultimately fed from an external power adapter that does get it's power from an AC wall socket.
-Neelix
The idea being that it's ultimately fed from an external power adapter that does get it's power from an AC wall socket.
-Neelix
How to identify these? (Also, any tips on finding one that will break before my N900's USB port if it gets snagged? Lost one N900 this way already...)
Even underclocked?? Every phone can boot off a dead battery with standard USB power I think... :/That won't even be enough for the OMAP5
Blue Shadow
Very Active Member
- Joined
- Mar 7, 2016
- Messages
- 188
Many Phones are not even able to boot/run from any external source without the battery. So with an empty battery you often have to wait a while before booting, until it is charged a bit.
The number of Phones that are able to run from a 500mA USB without a battery should be even smaller.
(edit: i meant: smaller than the number of phones that can boot from external sources without battery in general)
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Xcl4m4t10n
Advanced Member
- Joined
- Dec 18, 2009
- Messages
- 1,209
Facepalm.jpg
rygD
Nihilistic Mystic
I think every phone is a good source of nutrition.
hns
Well-Known Member
There is a negative. A weak cable burns significantly more energy if we let this voltage go down to 3.7V instead of 4.4V (Watt = Volt * Volt / Ohm). So this is likely a limitation specified somewhere in the USB standards and the chip tries to do its best to fulfill them by default (after hardware power on reset). Until we override something by software.
Anyways all this is only a problem if someone wants to operate a Pyra without battery and from wall charger only. This is more a lab environment setup than the standard operation mode with battery.
Booting from dead battery is a different and unrelated story. There is a special charging mode where the charger does only charge and not supply the OMAP until the battery has been significantly charged. Then, there is collected enough energy in the battery to boot.
[QUOTE="Askarus, post: 1394244, member: 59762"
Getting the remaining tweaks for about a year now...[/QUOTE]
tweaks: contraction originating from: two weeks, see also: two months™
Hey Askarus... when are you going to add your feet and head to your avatar? It's been a year now... havent been able to look you in the eyes. And don't be ashamed for wearing sandals.
And for one years, the Evil Dragon collected many materials like metals and rare earths. Using his wings, he visited many far away kingdoms and consulted with their seers and wise men.
The wise men from the south taught him about a material stronger than mithrill. The device [chest] would be protected by it . The wise men from the east created the smallest components to adorn the innards.
The wise man from the north drew many small lines on the three tablets the device would have. And the wise man from the [Middle?] west told him to keep the chanting connection, and to not do how others had done.
He made haste, because the device was to be produced before the great war started. The great war was against the golem, which looked like the device, but were not the device.
Finally, after the one year, there were two months, but the last three days of that second month were special.
From the book of the Dragon, chapter 3:2
Getting the remaining tweaks for about a year now...[/QUOTE]
tweaks: contraction originating from: two weeks, see also: two months™
Hey Askarus... when are you going to add your feet and head to your avatar? It's been a year now... havent been able to look you in the eyes. And don't be ashamed for wearing sandals.
And for one years, the Evil Dragon collected many materials like metals and rare earths. Using his wings, he visited many far away kingdoms and consulted with their seers and wise men.
The wise men from the south taught him about a material stronger than mithrill. The device [chest] would be protected by it . The wise men from the east created the smallest components to adorn the innards.
The wise man from the north drew many small lines on the three tablets the device would have. And the wise man from the [Middle?] west told him to keep the chanting connection, and to not do how others had done.
He made haste, because the device was to be produced before the great war started. The great war was against the golem, which looked like the device, but were not the device.
Finally, after the one year, there were two months, but the last three days of that second month were special.
From the book of the Dragon, chapter 3:2
WizardStan
Mega GP Mania
- Joined
- May 24, 2008
- Messages
- 16,731
They'll have a little stylized 'A' on them
Seriously, Anker is the best product for your money, in my opinion. They cost a bit more but you can save money by buying multi-packs off amazon. Got a 6 pack of various lengths for $12 and have no regrets about it. They charge better than any other cable I've found, which from reading this thread would probably be because other cables have a higher resistance where these are very low resistance. Such good cables.
levi
Still fresh, damnit!
Thanks for the update! Since tiler is apparently fixed now, I'm really looking forward to the promised video. Although getting prototypes out to developers will hopefully result in some videos too, which I'm fairly confident would push up past 1000 preorders quite quickly Please keep us informed about how many prototypes have been sent out - I was under a misapprehension that some prototype units had been sent out some time ago, so clarity on this would be appreciated.
Very exciting news though, thanks!
Please keep us informed about how many prototypes have been sent out - I was under a misapprehension that some prototype units had been sent out some time ago, so clarity on this would be appreciated.Very exciting news though, thanks!
rygD
Nihilistic Mystic
I have personally had good luck with cables from Volutz. The people that got the rest of the cables from the bundle I purchased don't seem as pleased with them, although they also have a tendency to murder any cable they encounter. I have only heard good things about Anker, so I will recommend those as replacements for them.
