That picture is too out of focus to see what is really there! Do you have a
camera with a macro lens?
I am thinking that there is a severe impedance mismatch, and at the same
time, there may be an active DC voltage on the earphone output. The
earphones on some of these mobile phones are using active circuitry, and
require a few volts to operate.
You would have to use a scope and a DVM and spend some time to figure out
the characteristics especially before doing any moods.
--
JANA
_____
wrote in message
ups.com...
I have a cell phone with a mini-usb plug on it.. the camera also came
with a set of earphones that plug into this usb connector, however, I
would like to go from this mini-usb to a 3.5 mm plug instead of the
headphones (my car has an aux plug input). The earphone/usb cable has
a little 3/4" case that has a microphone and Im guessing a amplifier.
So..
I opened the the little case, and sure enough where there are 3 wires
"L", "R", and ground that are going to the earbuds. The ground and
"R" wires were both going to the right earbud. So I desoldered these 3
wires from the board, and soldered the 2 wires coming from the 3.5 mm
plug.
The problem is, Im getting tons of noise, and at VERY low volume. Im
guessing this is because the ground on the plug isnt connected to the
ground of the amplifier/microphone board. However, the 3.5 mm plug
doesnt have a 3rd (ground) conductor to connect.. it only has a white
and red wire, nothing else.
If my post above, wasnt confusing enough, here's a totally blurry
picture that I took with the cell. Its hard to see anything on it,
but the red and white wires on the right are going to the plug.
http://i6.tinypic.com/5xe5fth.jpg
Im probably missing something obvious, but what am I doing wrong? How
can I connect a plug to where the headphones used to go?