doctorow — 2014-08-25T15:00:37-04:00 — #1
kpkpkp — 2014-08-25T15:22:04-04:00 — #2
I have a beef with the mentioned item: How do I pocket it without damaging it? It's a raw PCB!
Fortunately, there's competition, producing something more pocket friendly in Apple and non-Apple versions:
medievalist — 2014-08-25T15:23:00-04:00 — #3
What are the extraneous components ((R1, 2, 3) for? The product description says it's just a USB passthrough with the data lines clipped - so why are those resistors there?
vector — 2014-08-25T15:30:17-04:00 — #4
Newer Apple devices require a voltage level on the data pins or the device wont charge. I just modified an old iPod docking station to accommodate my iPhone 4 for that reason.
ronaldpottol — 2014-08-25T15:30:49-04:00 — #5
I have these, they seem to work very well, and do speed up charging of a computer and the like (computers may be too smart for your own good, and cut your phone down to the 2.5w spec of usb 2.0, when it could handle 10+w).
crenquis — 2014-08-25T15:36:15-04:00 — #6
Voltage divider for Apple stuff -- they expect a certain voltage on the data pins. Makes DIY chargers a pain.
Edit: didn't notice that @vector had responded to ya... I need to quit posting from my phone.
medievalist — 2014-08-25T15:37:48-04:00 — #7
You aren't likely to damage it by carrying it around with your pocket change, but you'd probably tear a hole in your pocket lining. Corners of PCBs are hell on fabric.
stephen_schenck — 2014-08-25T15:39:28-04:00 — #8
Why is this a circuit board?
Wouldn't a little flat piece of plastic, custom-cut to block the data pins, be far more elegant, affordable, and a better fit for the condom comparison?
ETA: ohhh, Apple crap. I'm little inclined to design accessories around the whims of devices that refuse to play nicely with others.
cservant — 2014-08-25T16:10:47-04:00 — #9
Xipiter, the security consultancy who created it, has already done one production run and shaken out the bugs, so it seems likely that they'll be able to fulfill orders again -- but as with all crowdfunded projects, caveat emptor.
It looks simple enough. I would probably play it safe and put in $5k as a starting point, even if you know what you're doing for a small batch electronics production run.
retepslluerb — 2014-08-25T16:11:03-04:00 — #10
As far as I've followed the issue it's actually Apple that plays nicely by following the USB spec by not simply drawing beyond 100 mA without negotiation.
eric_strom — 2014-08-25T16:37:35-04:00 — #11
The final product has a clear shrink wrap over the printed circuit board for protection and to prevent snags.
crenquis — 2014-08-25T17:28:32-04:00 — #12
There is no negotiation for a device that only charges stuff...
From what I recall when making a DIY voltage supply/charging station, the charging standard just requires shorting the data pins with a resistor -- Apple has a completely different scheme for supplying a certain voltage to each data pin (the voltage on the data pins tells the iPhone/etc what sort of current the charger can supply).
karls — 2014-08-25T17:50:17-04:00 — #13
Yes, but that is a relatively recent addition to the standard as a reaction to non-compliant dumb devices.
greggerca — 2014-08-25T17:55:39-04:00 — #14
Not that much malware is targeting these devices, but it's baked into the new builds of WP8.1 I guess:
It's not hardware though.
[Insert Obligatory Anti-Microsoft Verbiage Below Here]
ezecc — 2014-08-25T18:46:46-04:00 — #15
A new cased version of the USB Condom is coming out soon. An official announcement in a few days ...
sockdoll — 2014-08-25T18:56:19-04:00 — #16
At least you're keeping it charged.
samsam — 2014-08-26T09:46:27-04:00 — #17
So how is this different from the $8.99 "fast charging" no-data cable in Cory's link, or the $6.99 tiny "fast charging" no-data dongle in @kpkpkp's post?
Why Kickstart something that already exists, for more money? Do people think it's different because it's marketed as a "condom?"
fuzzyfungus — 2014-08-26T11:03:10-04:00 — #18
A few other bits and pieces (I know that I have this problem with an older Motorola dumbphone, and that it isn't terribly rare; but I don't know of a comprehensive list of device behaviors) expect various fiddly oddness on the data lines when connected to a charger.
Sometimes it's pure lock-in, or an attempt, some times I think it tells the device something about the current capabilities of the charger. Inelegant; but cheaper than throwing a whole USB host into a wall wart I suppose.
listener43 — 2014-08-26T11:03:47-04:00 — #19
This reminds me of a post I made quite some time ago:
plus ça change!
vector — 2014-08-26T11:30:27-04:00 — #20
Well, if you're extra-vigilant about protection, you can both visually inspect the entire circuit, and test the broken-out pins to confirm nothing dodgy is happening. Not possible with devices encased in (likely Chinese, with its implications) plastic.
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