Headset - Brainstorming session nr.1
Hello!
we get mails everyday asking if a plug for a complete headset solution would be possible. Prabu, Jurgen, and at least 5 other guys keep pinging us about this idea. Well, I thought instead of replying all the mails regarding this topic .. maybe we can have our brainstorming session where the question comes from our (TouchMods) site and the answers and ideas are requested from your side.
What we want at the end is: "a headphone combination with 2.5mm plug..." - because there is also Mic and Speaker pins available..." This is used on a lot of mobile phones and you can buy the mic-headphone combination. The only thing you need is a amplifier and the 2.5mm receptable." MAYBE YES; MAYBE NOT!
What we already know (almost for sure):
1) There is a little problem: the audio level on the Line-Out pins of the Touch is most probably not SW- adjustable, ie, it would need either the 3.5 mm JAck to be used for the headphones so that we can adjust the volume, or we will need a cable with a mechanical volume control that connects to the forementioned Line-Out pins. Even if it is doable:
2) we know that the LineOut pins are meant to be connected to an Amplifier input (with an imput impedance of (10k-100k)Ohm and not to a tiny speaker that has around (30-100)Ohms and therefore sucks much more current.
That lead us considering to use the 3.5mm Headphone out directly as speaker out, and the dock connector with a preamp as the place to plug in the wires of a headset- mic in case we use a headset.. But then we need a solution for the 2.5mm Mic/speaker Jack reduction for VoIP.. as two 3.5 mm jacks (the classial green and pink - you know) and an extra Dock Conn would look a little strange...
Ok, here you go, we have the problem, we know what we want at the end, we just need to discuss how to make it. In case you come up with good ideas, you can be sure we will build the prototypes and publish a nice howTo soon.
Cheers, Marian
we get mails everyday asking if a plug for a complete headset solution would be possible. Prabu, Jurgen, and at least 5 other guys keep pinging us about this idea. Well, I thought instead of replying all the mails regarding this topic .. maybe we can have our brainstorming session where the question comes from our (TouchMods) site and the answers and ideas are requested from your side.
What we want at the end is: "a headphone combination with 2.5mm plug..." - because there is also Mic and Speaker pins available..." This is used on a lot of mobile phones and you can buy the mic-headphone combination. The only thing you need is a amplifier and the 2.5mm receptable." MAYBE YES; MAYBE NOT!
What we already know (almost for sure):
1) There is a little problem: the audio level on the Line-Out pins of the Touch is most probably not SW- adjustable, ie, it would need either the 3.5 mm JAck to be used for the headphones so that we can adjust the volume, or we will need a cable with a mechanical volume control that connects to the forementioned Line-Out pins. Even if it is doable:
2) we know that the LineOut pins are meant to be connected to an Amplifier input (with an imput impedance of (10k-100k)Ohm and not to a tiny speaker that has around (30-100)Ohms and therefore sucks much more current.
That lead us considering to use the 3.5mm Headphone out directly as speaker out, and the dock connector with a preamp as the place to plug in the wires of a headset- mic in case we use a headset.. But then we need a solution for the 2.5mm Mic/speaker Jack reduction for VoIP.. as two 3.5 mm jacks (the classial green and pink - you know) and an extra Dock Conn would look a little strange...
Ok, here you go, we have the problem, we know what we want at the end, we just need to discuss how to make it. In case you come up with good ideas, you can be sure we will build the prototypes and publish a nice howTo soon.
Cheers, Marian
