Celliax.Org

You can build a Celliax Hardware Adapter by yourself or Developer's Kit distribution.

Let's start with the most basic kind of Celliax Hardware Adapter, the one that you can use with most models and brands of cellphones.

The Celliax Hardware Adapter described below will manage cellphones compatibles with the standard Motorola handsfree, most of cellphones are compatible with it, the cheap one with the 2.5mm stereo jack at the cellphone side.
It will not work with most Nokia and other cellphones with proprietary handsfree connectors. For them you have to build a more complicated adapter. We'll post a page for that.

You buy, or build yourself (we'll post a page on how to), a datacable for your specific cellphone model. The kind of datacable used to transfer data between the PC and your model of cellphone, like ringtones etc, or for using the cellphone as a cdma|gsm|gprs modem will works.

The datacable will be the control path for the PC to manage your cellphone.

Celliax need also a voice path, to bring the audio of the voice call from the cellphone to the computer and viceversa.

For this you build a special audiocable.

It's not that difficult, you just need some electronic soldering skill and a tester, or a friend with that skill (he has a tester ;-) ).

For building it yourself you can start with a standard Motorola handsfree, the cheap one with the 2.5mm jack, so you don't have to solder the 2.5mm stereo jack to the cable.

The trick is to cut the cable of the handsfree between the jack and the mic.

Then you very gently and carefully laid bare the conductor wires inside the handsfree cable on the side you cutted it.

The wires will probably be coated by insulating paint of different colors. Remove that paint very very gently with a blade, maintaining the wires separated from each other. Alternatively, and maybe easier, you can use the soldering iron with a ball of solder and "tinning" the wires leads, maintaining each lead into the solder ball for some seconds, until the paint burns out.

With the tester individuate which lead is connected to which part of the jack.

Then solder the leads to two standard 3.5mm stereo jacks, that will plug in the soundcard.

The trick here is to make the leads that come from the cellphone mic to be wired to the jack that goes to the speaker socket of the soundcard, and to make the leads that come from the cellphone speaker to be wired to the jack that goes to the mic socket of the soundcard.

A picture (schematic) worth a thousand words click on it to enlarge:

OK?

Please, leave comments from the link below on the points that can be made easier to understand or are unclear.

And now, here's something ugly ;-)

Audio adapter for Nokia 3310 and compatibles

This is an old schema I draw while I was experimenting with 3310s. Hope it works ;). For sure something similar works ;P. Since some months I use and distribute Chinese made adapters that works flawlessly :). One of those days I'll try to reverse engineer it and publish the results.