Jami Pekkanen wrote:
I continued figuring out the headset detection, and I (accidentally)
noticed that the resistance is different depending on which direction
it's measured. On another direction it's about 1.8 kOhms and when
switching around the heads of the multimeter, I get ~1.1 kOhms.
Jami Pekkanen wrote:
Kemal Hadimli wrote:
1520 ohms.
headset button pressed it goes down to 47 ohms.
Thanks! I bought a multimeter and got similar values. The 40-50 ohms
seems to be the headset's (microphone's and speakers') internal resistance.
However, I now have a circuit (now just
Jami Pekkanen wrote:
Continuing my monolog.
I came to think to me that this could be done with a diode.
Unfortunately my knowledge in them is even worse than with resistors.
I took some lessons from Wikipedia and came up with a circuit diagram
that could give similar resistances than the
Should try 1n4148 as the diode, although I can't offer much help/ideas
other than that. Very limited electronics knowledge.
You can salvage 1n4148 or alikes from any radio or scrap pcb lying
around. Look for the tiny orange-ish[1] diodes.
[1] http://www.eleinmec.com/figures/029_02.gif
On
I know of a pinout for a very similar device:
http://web.it.kth.se/~maguire/iPAQ-photos/iPAQ-audio-adapter.html
Thanks! That confirmed my info about the pinout. The PDF was quite in
depth.
Gopi Flaherty wrote:
On Sep 4, 2007, at 7:24 PM, Jami Pekkanen wrote:
Perhaps measuring the
1520 ohms.
headset button pressed it goes down to 47 ohms.
happy hacking.
On 9/5/07, Jami Pekkanen [EMAIL PROTECTED] wrote:
I know of a pinout for a very similar device:
http://web.it.kth.se/~maguire/iPAQ-photos/iPAQ-audio-adapter.html
Thanks! That confirmed my info about the pinout. The
Kemal Hadimli wrote:
1520 ohms.
headset button pressed it goes down to 47 ohms.
Thanks! I bought a multimeter and got similar values. The 40-50 ohms
seems to be the headset's (microphone's and speakers') internal resistance.
However, I now have a circuit (now just made of resistors) that has
Hello,
This isn't exactly maemo specific question, but I think this is the best
forum anyway.
I'm trying to solder together an adapter that splits the N800's 4-pole
audio plug to two separate 3.5 mm females so that I can plug in separate
input and output devices, eg electric guitar input and
On Wed, Sep 05, 2007 at 02:24:52AM +0300, Jami Pekkanen wrote:
Hello,
This isn't exactly maemo specific question, but I think this is the best
forum anyway.
I'm trying to solder together an adapter that splits the N800's 4-pole
audio plug to two separate 3.5 mm females so that I can
On Sep 4, 2007, at 7:24 PM, Jami Pekkanen wrote:
Is it possible that something special is required in the input
connection? There at least seems to be some resistors in the headset's
circuit, but I assumed they are just for the push-button. Also does
anybody have a pinout for the jack?
I've
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