WANTED: Good Source of Electronics Theory

[Joe]

On Apr 21, 5:38 pm, Allodoxaphobia <bit-buc...@config.com> wrote:

In article <82ada154-f5aa-4b21-aa91-7e72fbc9a...@d45g2000hsc.googlegroups.com>, Joe <joe5...@gmail.com> wrote:
I have no cell service in my basement but I'd like to be able to take
a call without running up the stairs. Could I splice a 50ft extension
cord into my headset? I figure there are two wires inside for for
talking and the other for listening so it should work, no?

And, how were you planning on answering the call?
And, does your cell phone ring through the speaker , or through a
seperate sounder/speaker?

the headset has a button for answering calls, not sure if that's
another wire. I would be able to hear the cellphone - right now my
phone is upstairs in my kitchen so I run up from my basement to answer
it. I was hoping to have it sit pressed against my basement window
(which is the only place I get a signal) and use the headset to at
least be able to take calls. I think I might be better off going with
a bluetooth headset but I was just trying to save some money and do
something creative.

 

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[Ignoramus4930]

On 2008-04-22, Matt Ion <soundy106@gmail.com> wrote:

Ignoramus4289 wrote:
Thanks to all. I spent quite a bit of time with this camera. I am now
positive that the cause is mechanical in nature. This camera indeed
has a feature that turns it off if the lid of the memory compartment
is opened. Even very slight touching of that lid, causes ÓÔČĹ ĂÁÍĹŇthe
camera to shut down.

The switch is inside the camera body and is activated by a little
"finger" on the lid that goes into the hole to push the top of the
switch.

Now that I have established the cause, with some certainty, we can
think of the best way to fix that.

Could you use a small pointy object to depress that switch and fire off
a few test shots?

Yes, it works fine like that. I think that it is just a minor wear
issue -- but it is not clear how to fix it.

i

One other thing to check: dirty or corroded battery contacts. Good
way to clean them is with a pencil eraser - just grab any standard
pencil (good for reaching into the battery compartment) and give all
the contacts a quick scrub with the eraser.

--
Due to extreme spam originating from Google Groups, and their inattention
to spammers, I and many others block all articles originating
from Google Groups. If you want your postings to be seen by
more readers you will need to find a different means of
posting on Usenet.
http://improve-usenet.org/

 

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[Eeyore]

EADGBE wrote:

Notice that there are some "typical" expected voltages indicated at
certain points. These "typical" voltages have come right out of the
service manual. All of the voltages marked "OK" are...well...OKAY.
But the three voltages marked with a star (*) are NOT okay...they are
all just a few millivolts each--around 20 to 30mV.

There's something amiss with the biasing of the output emitter-follower
stage. The voltage on the base of Q208 should be about 1.2V less (not 0.2V
less I think that 6.8V should be 5.8V) than the voltage on the base of
Q207. That suggests possibly zero or very low current in Q205's collector
circuit. Suggest you measure the voltage across the 12k connected to
Q205's base-emitter.

Graham