iPod Touch Mods

Hello. To show some progress, here is the status: No PCB (Printed Circuit Board), no SMD (Surface Mounted Devices)!
What we have recently is more a DMD, ie. Device-Mounted-Devices. Just check the image. It is functional! Although the righ side (redundant) legs of the IC were removed, there is still not too much space inside the original dock connector, not to mention that the mic should be also inside, if we want to have a plug with long-enough lifetime. I changed my mind: putting the mics halfway out is just risky. No mobile phones have the sensitive microphone visible! Pls, if anybody is in a mood of designing an smd board, just do it. If not, then I will do some more iterations, until the mic gets into the plug. Cheers!!! Marian

EDIT: You can find some rec. samples online...
http://bananenoeffnen.de/Recs_VNotes

Believers who want to support the Project may click on the "Donate" button at touchmods.net. Thnx.

kevio from the ipodtouchfan team just released his design of a Sleeve with built-in Speaker and Microphone for the iPod Touch. To build a tipper dock connector will be a little tricky, but the design is simply beautiful!

NOTE: Image removed temporarily - requested by Kevin

Many of our friends at the ipod Touch-fans forum did ask if I will provide the details of the circuit so that they can build it by themself. Well, here it is:


A little description:
- 13, 26 and 29 are the pin indices of the Dock Connector.
- The Resistor above the mic could be around 5kOhm, depending on your mic (see the note below)
- The capacitors C1 and C2 should be above 1microPharad, any vale is ok.

The picture quality is not the best, as it was made in a fast way on my N770 using the amazing Xournal noteTaker.
Anyway, what is important, in case you plan to build everything inside the Dock Connector, you will need to make a PCB that is all-in-all less than 3.5x 8x 16mm, as the internal height of the Dock Connector is 3.5mm. Not to mention that the position of the PCB will be also restricted (centralized) by the pins inside the plug. A smart solution would be to leave the PCB out and to put the resistors directly onto the legs of the IC. I will post a photo soon showing what I mean.

Dock Connector Pinout: ipodlinuxTeam

Believers who want to support the Project may click on the "Donate" button at touchmods.net. Thnx.
IMPORTANT!!
When using the tiny mic from the other posts, the Resistor above the mic should be 6,8kOhm. Simply, the best choise is when the voltage at the top of the mic is close to 1.65V, given, that Ucc=3.3V. Then there is no voltage on C1, ie. no transient clicks when you plug it in.

After some searching it seems we finally have the microphone that will fit the beautiful black dock connector! Also, the most of the SMD parts are already here. Just check the photos below.

Hello. To give you an update on the Mic recording topic, pls find below some photos showing a stereo preamp aconnected to pins 25 and 26. The signal is clean and strong enough (Apple did built in high quality D/A converters for us). Now everything depends on the miniaturization of the circuit and on the SW you are just working on ;)




Believers who want to support the Project may click on the "Donate" button at touchmods.net. Thnx.

Amazing. Slim. Black. And all pins are there!!
We are very-very close to have a mini-mic easily attachable to the dock connector.
Keep tuned! (just tried to upload a photo...) ok, let's use photobucket as some of you suggested.



And yess, we are over the 250 MB transfer limit of this blog, so I need to find a solution.
Maybe somebody has an idea?

UPDATE: Dec.12 we are over 30GB!!!!

Question of the day: why does the Headphone Jack come with 4 pins?

Hello.
Many people have been asking if skype, gizmo or other VoIP SW will be available for The iPod Touch. ...and since physically there is no Microphone built into the Touch, many did think it is impossible.
But.
I am happy to inform you, that the Audio Input pins of the iPod Touch are active, and can be used for connecting any Audio source (like an external Mic, your CD-player, FM radio, etc) for recording. This also opens the doors for VoIP applications!!

The way I tested it: Modded an old docking cable and connected the Line-In pins to a source of Audio signal. Then used the Voice recorder App originally written for the iPhone. The dock pinouts are here: http://ipodlinux.org/Dock_Connector

Cheers!