login
Staigen
-
Posts
695 -
Joined
-
Last visited
Never
Content Type
Profiles
Forums
Events
Posts posted by Staigen
-
-
Hi Ante
If the speaker was powered when it happend, and maybee a few hours after that, i belive theres not gonna be more damage to it than there already is!
//Staigen -
Hi Logan
is it possible for a CPU not to have any sound card at all?
Of course the computer have a soundcard, else you won't hear anything!
The CPU dont have a soundcard!
//Staigen -
Hey Ante, dont you think he should do this simple test first, before dismantling
anything? Probably it is the speakers amp or psu that is at fault, but you never
know until you test.
//Staigen -
Ok, do the test i told you, than we know if it is the speaker or the soundcard!
//Staigen -
Hi Logan
How is your speaker system connected to your computer?
Via USB ?
//Staigen -
Hi Logan
How is it powered? If it is a wallwart(or what the name for it is), then it
can be that one that is at fault. Also try to turn up the volume to max,
and take a screwdriver and touch the inputs, if there is some sound, it
shall be some highpitched, 50 or 60 Hz hum, your speakers is probably
not at fault. The input is the wire you connect to the computer(soundcard).
Then it's probably your soundcard that is at fault. And that, i belive is at
warranty. ;D ;D ;D
//Staigen -
Hi Um...Me123
Sorry for the dumb question
No question is too dumb, dumbness is to not ask! ;D
Now to your question!
You didn't supply us with enough information to properly answer your question!
How much current through the diode? That will determine the diode.
Up to 1 Amp a 1N400x diode will fit nicely, up to 3 Amp a 1N540x diode will fit,
for higher currents a diode at higer rating is needed. Look at datasheets, and
search the internet! The x in above diode names is a figure between 1 and 7.
Hey, the current from a battery can only flow in one direction, so maybee you
dont need a diode, the diode will waste about 0.5 to 1 volt of your battery
voltage! ;D
If you supply us with more information we can give you a more accurate
information!
Staigen -
Hi Fatal_Byte
As Audioguru said the first two is probably that! ;D ;D
The 3rd is 47uF/35Volt radial electrolytic cap
the 4rth is a 6-35 pF trimmer cap
Where did you found this, if you tell us, we can make an extra check! ;D
//Staigen -
Hi Diarmuid
There are already some good books here on this site, E-Books(PDF-files, some are RARed)!
Look at the "Articles" area at the top of this side! Ante have uploaded some too,
look in the "Electronic Resources" area here in the forum! They dont cost you a lot!
//Staigen -
Hi
IT WILL WORK OR NOT?
Its not that simple, the question can't be answered that easy.
It might work or it might not work!
What is your antenna for instance? And how far is the radio stations?
The power they transmit at? Your topology?
Nothing can stand up against a good antenna arangement!
You should start there, if you dont already have done that.
The amplifier you linked to is the one that have the miller integrators.
I belive the other two is better, but i am not sure.
//Staigen -
Hi
The link dont work!
//Staigen -
Hi
U stands for Voltage and I stands for Current, but
Dont you think its time to read a beginner's book about elektronics first?
//Staigen -
Hi Diarmuid
Then you have to learn Ohms Law! It goes like this: -
Hi zefiris2K5
This pot, where did you found it, on some machine or something?
The pic is not very clear, how many connections do it have, and where are they?
Can it be some kind of RPM governor, that is worn out, if it's output is unstable?
//Staigen -
Hi
What is Q? Quiescent? Usally Q means quality in electronics, used in resonant cirquits and filters! The inverse of Q is damping. The quiescent point depends on the output demands, if you need more than 1 mA out, than a quiescent current of 1 mA is a little bit low. Also, if you need an output peak to peak voltage of 10V, than a VCC of 9V is obviously not enough.
//Staigen -
Hi
you are not able to answer this question
Hehe, so i am not able to answer this question, hehehehe
But, there are 3 projects dealing with amplifying signals in the 86-108Mhz range at the RF
Cirquits Projects side. One of them try to amplify these signals, using miller integrators, and
i dont think that is a good design.leave it man
Ok, i leave it, but it is not a promisedont worry
Im not worriedgive chance to others to give the answers
I belive everyone is allowed to post in every topic, and usally also are wlecomethese simple questions
Simple? We dont even know wich of the amplifiers we shall discuss
//Staigen -
Hi kuwaiti badr, welcome to this forum, nice to have you here ;D
Cant you read, it is a piezo speaker, used as a sensor here. The speaker comes
from a piezo buzzer. I belive you can use the piezo ringer from a modern telephone
as well, or an another piezo speaker.
//Staigen -
Hi there
Usally you design a transistor stage based on its output demands,
voltage, current, power. Then you decide what transistor to use.
The emitter voltage is usally 5-10% of Vcc, but not always.
//Staigen -
Hi
All you need is two equal-valued resistors and a rail-to-rail I/O op amp.
As i suggested, roughly!
And what do you say pebe?
Anyone else?
//Staigen -
Hi again Gn0stik
Im not sure that this can produce enough current to light up a led,
You have to try it, connect it to a rectifier bridge and connect that
one to the led, to see if the led lit, if it does, you can also connect
an electrolytic cap too, to get the led to lit for a longer time.
Do you have MSN or ICQ or something like that, its easier and faster
to communicate that way?
//Staigen -
Hi Edward
When you start to rise the input from 2.5V the output is still at a saturated
0V, i havent calculated when the output start to rise! When the input voltage
come near 5V the output saturate against 5V, i havent calculated that voltage
either!
//Staigen -
Hi Edward
Hehe, have you been lazy again, this must be totally wrong!
When the input is 2.5 Volt, the output saturate at 0 Volt!
When the input is 5 Volt, the output saturate at 5 Volt!
And the scale between that is not linear!
But the choice of op-amp seems to be exellent! ;D
To windoze killa:
Wich op-amp did you use when you simulated the cirquit?
Did it have rail to rail output possibillitys?
Did it have input common mode that include the positive rail?
To pebe:
What do you think?
//Staigen -
Hi
A link would be nice! ???
So we are discussing the same project!
//Staigen -
Hi Gn0stik
What is it that you have bought from DigiKey? All i get in the link you provided
is an old pricelist from 2001, and on page 4 there is no second table! ??? ??? ???
No wonder you dont get any answer!
Show us an accurate datasheet of what you bought, and i will look at it, but i
cant promise you what to do.
//Staigen
BT-693 speaker system
in Service Manuals
Posted
Hi Logan
Probably on the motherboard, else it is in a slot! Dont you see that, by
looking at the rear side of your computer?
The CPU is an IC !
//Staigen