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"philosophy"

what this stuff ?

a word that maybe don't exist, we aren't sure of, how can we affirm it exists ?


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You don't need power to both sides of the opto-isolator. (I assume that's what your referring to). The name isolator really helps to explain what the component is for. It is a switch like any other transistor, but effectively electrically-isolates the transmitter from the receiver because it uses light as the medium. Because of this they are often used in communications and control systems. For example, some modems use them to isolate your computer from transients (or voltage spikes) from the telephone line.

But to answer your question, a battery is not needed. The transmitter is a simple light emitting diode, and the receiver end is just a light-sensitive device- a photosensor basically. They can also prevent ground loops because the ground is effectively seperated.

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teach also a little other matters, that can be help to :cool:



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No kidding!? Dang...now I gotta open up the mouse.

Thanks alot... :wink:



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ok

but do you'll see the mb with optical fibres, crystals & maybe star trek crystals for energy ? :lol:


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ok

so something fly above my mind

have a look to your document:

"To complete the isolation of the low and high power sides, each must be powered by a completely separate battery. The high power side will be powered by the main 12v or 24v battery. The low-power side can be powered by a much smaller battery, maybe 6v."

but maybe im wrong ?


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Star Trek Crystals? Oh yeah dude...with trilythium cores!LoL

I would like to invest into companies doing optical stuff seeing that as the next biggest leap. Guess I need the job first! I need to write my resume over the holidays. :(

Internet backbones use optics...it's only a matter of time before it evolves to the desktop computer. But alas, it will take years to get there.

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thanks

so if i understand well, to overclock it we have to mine ?

(im serious, not a joke)

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Ahhh, now I see what your saying! The power used on either side is arbitrary. The part your referring to does help to show that indeed both sides are seperated electrically because they use two different power sources. You do have to drive the LED on the transmitting side, so you will need power to do that, and you will need power on the receiving end also because what good does it do to turn on a switch if no current passes through it? I don't know if helps to explain or not. Maybe I'm losing ya'.

Here is a better document:
<A HREF="http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213614,00.html" target="_new">http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213614,00.html</A>

Does this help?


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perhaps this can be in few years.


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Sorry if I'm not explaining this too well. I wish I could draw it out for you.

Hey- I gotta run. GOing to a family Christmas party...Funny thing is I have to go early because they blew the circuit breaker! LoL...

Live long and prosper, labdog!

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you're right :lol:

i think i have to sleep some hours

comming back soon... :wink:


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well, I guess those trilithium crystals are used for fuel in star trek!

they still had electronics, saw Mr.Spock open up a panel on the bridge and solder some board in it! But then it was way back in the 23rd century. They may have turned to photonics almost a hundred years later in the times of Capt. Piccard and his successors.

girish

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You too :)

regrettable you can't :)


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this opto-isolator is really a electronic component, a medium to insulate one high power circuit with a low power one.

The telephone lines are prone to spikes and overshoots so using them directly in a modem is dangerous. That is why they just operate a IR LED inside a sealed casing. A photosensor follows the input and passes the signals to the actual modem circuit that connects with your PC. BTW the telephone lines work at 48V (on hook) to 90V (ring) DC! No component except a resistor can bring this high voltage to levels of 3~5V, opto-isolator does that without disturbing either sides!

Imagine a 250V transient hitting your modem and getting into the PC through the serial port burning your modem on the way!

A opto-isolator just protects your equipment from that.

girish

<font color=red>Nothing is fool-proof. Fools are Ingenious!</font color=red>

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if i understood well,

in home, modem protect with this optical isolator your pc (a kind of drop voltage component)

but what's about the other devices which are also plugged to your telephone line ?

like fax, adsl modem or maybe others...

have they all also this same component ?


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<P ID="edit"><FONT SIZE=-1><EM>Edited by labdog on 12/26/01 00:17 AM.</EM></FONT></P>

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yes :smile:

thanks

note:
sorry for my ignorance in Electronics :smile:


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for informations supports, we have already optical fibres

next maybe Engineers will found how to use crystals to replace electricity by light..

sorry, i don't know exactly what is a "multilayered circuitry" ?

just that i know it's actually cpu are made of mutilayered transistors


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Multilayered refers to how many different levels are used for the geometric layout of the circuit. Most VLSI devices have 6 layers. This is basically needed in order for more efficient routing and hence less silicon real estate. If processors could only have a single layer, the chips today probably wouldn't even fit in the chassis!

I believe some of the layers are:
M1 (metal 1)
M2 (metal 2)
poly
p-diffusion
n-diffusion

Nodes called vias are used to join the different layers. You can think of layers like stories of a building...

Don't ask me what these are, because its been WAY too long since I've done VLSI stuff.

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