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Message from discussion Diy adventures with Iphone
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Robert L Cochran  
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 More options Dec 18 2011, 2:27 pm
From: Robert L Cochran <cochr...@speakeasy.net>
Date: Sun, 18 Dec 2011 14:27:26 -0500
Local: Sun, Dec 18 2011 2:27 pm
Subject: Re: [NYCR:Microcontrollers] Diy adventures with Iphone
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iPhones use pentalobe screws in some places and you need the right
fastener head or screwdriver to avoid problems. I'm not a master of
extracting screws that have stripped out heads, but it might be possible
to find tips on http://www.ifixit.com/

I have iFixit's "version 1" 54-piece toolkit and it seems to work very
well if the screw or whatever is not frozen solidly into whatever it is.
For those I need beefier screwdrivers that let me exert more twisting
force -- I tend to like Wiha drivers for that, but I'm not sophisticated
with tools, either. I think it is worth the cost for me to buy their new
toolkit which just came out. I do work with small devices. Not as small
or as specialized as a watch...my hands shake way too much.

Check iFixit's teardown and repair manuals before trying to disassemble
small electronic devices. Reading what is on the iFixit site is well
worth the time. I just wish their videos are closed captioned. The
teardown photos usually tell me a lot, but I always wonder if I'm
missing something from the videos.

Bob Cochran

On 12/17/11 10:34 PM, mattqui...@gmail.com wrote:

> Hope this evening finds everyone well.

> In the process of trying to swap out a shattered screen on an Iphone
> I've unfortunately stripped a screw head. It's one of the internal
> screws, extremely small. I was curious, does anyone know where to find
> a tap and die set small enough to tap into one of these screws?

> Cheers,
> Matt
> ------------------------------------------------------------------------
> *From: * michael lowry <m...@njit.edu>
> *Sender: * nycresistormicrocontrollers@googlegroups.com
> *Date: *Fri, 16 Dec 2011 16:42:41 -0500
> *To: *<nycresistormicrocontrollers@googlegroups.com>
> *ReplyTo: * nycresistormicrocontrollers@googlegroups.com
> *Subject: *Re: [NYCR:Microcontrollers] Powering a GSM cellular shield

> Best of luck on the project. Let us know how it works out =]

> On Fri, Dec 16, 2011 at 3:04 PM, Chris Clearfield
> <chris.clearfi...@gmail.com <mailto:chris.clearfi...@gmail.com>> wrote:

>     Hey,
>     The shield does in fact take from Vin, so I've ordered a wall wart to
>     get this hooked up.

>     Thanks everybody for the suggestions.
>     Chris

>     On Tue, Dec 13, 2011 at 4:37 PM, Chris Clearfield
>     <chris.clearfi...@gmail.com <mailto:chris.clearfi...@gmail.com>>
>     wrote:
>     > Thanks all. I will check all this stuff tonight.
>     > --
>     > Chris

>     > On Tue, Dec 13, 2011 at 2:00 PM, michael lowry <m...@njit.edu
>     <mailto:m...@njit.edu>> wrote:
>     >> The particular regulator in mind is spec'ed out as a 3 Amp
>     regulator, so
>     >> this should work handily. Double check the datasheet, but
>     that's what i
>     >> found with a quick search.

>     (http://www.datasheetcatalog.org/datasheet/sipex/SPX29300T-2.5_TR.pdf)

>     >> On Tue, Dec 13, 2011 at 1:39 PM, Dan Lavin <dan...@verizon.net
>     <mailto:dan...@verizon.net>> wrote:

>     >>> Looking at the schematic, the module has its own voltage
>     regulator.  From
>     >>> the picture it looks like the regulator is connected to Vin on the
>     >>> Arduino--VERIFY THIS--so the module will be powered without
>     its power going
>     >>> through the Arduino's regulator.  The module does not appear
>     to even connect
>     >>> to the Arduino's +5 or +3.3 lines.  As a result you can use a
>     2 amp wall
>     >>> wart.

>     >>> Check the data sheet on the regulator for voltage limits, but
>     I expect
>     >>> that something in the 6-12 volt range should work.  Remember
>     that the output
>     >>> voltage of unregulated wall warts is often not as labeled, so
>     check under
>     >>> load.

>     >>> On 12/13/2011 10:03 AM, Chris Clearfield wrote:

>     >>>> Hey,
>     >>>> I've been working on a project that will make use of a GSM
>     cellular
>     >>>> shield (http://www.sparkfun.com/products/9607). It's been
>     going fairly
>     >>>> well, but I have a question about powering the device that I
>     haven't
>     >>>> quite been able to figure out.

>     >>>> The shield can be powered by the arduino itself, but during
>     high loads
>     >>>> (e.g., while transmitting), it can draw up to 2amps, more
>     than the
>     >>>> arduino can provide. So, it's recommended that it be powered
>     >>>> "independently."  I'm not sure what this last thing means. It
>     seems
>     >>>> like the shield hooks into V_in from the arduino.

>     >>>> Should I just hook up the barrel jack of the arduino to an
>     >>>> appropriately rated wall wort? What should the voltage of the
>     wall
>     >>>> wort be? Can I still plug USB into the computer to
>     communicate with
>     >>>> the arduino while having it powered by the wall wort?

>     >>>> Any advice appreciated.

>     >>>> Thanks,
>     >>>> Chris

>     >>> --
>     >>> You received this message because you are subscribed to the
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>     >>> For more options, visit this group at
>     >>> http://groups.google.com/group/nycresistormicrocontrollers?hl=en.

>     >> --

>     >> Michael Lowry
>     >> Research Assistant

>     >> NYU Minimally Invasive Surgery Lab

>     >> 423 E 23rd Street, New York, NY 10010

>     >> Office: (212) 686-7500 X6441 <tel:%28212%29%20686-7500%20X6441>
>     >> Cell: (201) 787-8633 <tel:%28201%29%20787-8633>

>     >> m...@njit.edu <mailto:m...@njit.edu>

>     >> --
>     >> You received this message because you are subscribed to the
>     Google Groups
>     >> "NYCResistor:Microcontrollers" group.
>     >> To post to this group, send email to
>     >> nycresistormicrocontrollers@googlegroups.com
>     <mailto:nycresistormicrocontrollers@googlegroups.com>.
>     >> To unsubscribe from this group, send email to
>     >> nycresistormicrocontrollers+unsubscribe@googlegroups.com
>     <mailto:nycresistormicrocontrollers%2Bunsubscribe@googlegroups.com>.
>     >> For more options, visit this group at
>     >> http://groups.google.com/group/nycresistormicrocontrollers?hl=en.

>     > --
>     > Chris Clearfield

>     --
>     Chris Clearfield

>     --
>     You received this message because you are subscribed to the Google
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>     To post to this group, send email to
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> --

> Michael Lowry
> Research Assistant

> NYU Minimally Invasive Surgery Lab

> 423 E 23rd Street, New York, NY 10010

> Office: (212) 686-7500 X6441
> Cell: (201) 787-8633

> m...@njit.edu <mailto:m...@njit.edu>

> --
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