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Re: CPU question
Mounir Shita
¿ªÔÆÌåÓýYou're
talking about using the CPU's in a non-PC enviroment? I mean using them in your
own PCB?
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CPU question
While we are on the topic of microcontrollers and such, here is my question.
With the pentium 3 500MHZ and 700 MHZ at prices of $50 dollars and less, I was wondering if it is possible to actually use this CPU's for dedicated computing? If this is possible I would love to learn about these oppurtunities. I would think that with all of the power in these processors you could do make some really strong projects. Thanks for any help. Jon |
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Re: newbie inquiry
A good place for a beginning electronics information is in
the "bookmarks" section of the yahoo groups Electronics 101 web page. If you are using this group only as an email list then you are missing out on the other features that the group page has to offer. There is an on line text book and some very good links. Google or your favorite search engine is a great place to look for specific information (generally better than someones opinion). Datasheets are expecially easy to find this way. The web has made that part of my job much easier. Lamda: greek letter overused for identifying college fraternaties :) ( ...and what Jim says - wavelength) --- In Electronics_101@y..., Jim Purcell <jpurcell@w...> wrote: Teodoro,symbolI don't know what a lamda is,For one thing it's a brand of power supply. In RF circles it is the for wave length.current isbut I think it's the current that me tolow. Or am I wrong? This is the kind of questions which motivate him.learn and I appreciate it.Neither voltage nor current alone cannot kill anyone or even shock Both are necessary, i.e. power. And probably time as well although Ienough current to be shocked. If the voltage source is removed very quicklyand from clarification, andtime to time join in the discussion, usually to ask for programmingmake some contribution if I have any.Glad to have you. experience and do not know how to actuallyforward dis Virus to eferyvone on your mailing list and den manuallycooperation.
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Re: newbie inquiry
Jim Purcell
Teodoro,
I don't know what a lamda is,For one thing it's a brand of power supply. In RF circles it is the symbol for wave length. but I think it's the current thatNeither voltage nor current alone cannot kill anyone or even shock him. Both are necessary, i.e. power. And probably time as well although I suspect that this is a variable that probably varies more with the individual. So, if the voltage is low the person will not draw enough current to be shocked. If the voltage source is removed very quickly the person may be shocked but might survive if longer exposure would have killed or injured him. Glad to have you. Jim gotta add this funny: VARNING: MinnySota Computir Virus Ve haf just sent you da "NORVEGIAN VIRUS." Since ve do not haf any programming experience and do not know how to actually damage your computer, dis Virus verks on da onor system. Please forward dis Virus to eferyvone on your mailing list and den manually delete all of da files on your hard drive. Tank you for your cooperation. Sven and Ole -- William F. Roberts 35081 West Fairview Road Oconomowoc, WI, 53066 wroberts@... |
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Re: Bomb
Mounir Shita
¿ªÔÆÌåÓýI was
going to say that life is more than just serious stuff. If we can't slide a
little out of the subject when someone asks a stupid question as?how to
make a bomb, then what are we ? I'm sure even Einstein had some fun with his
theories about the universe.
?
Enjoy
life and don't get to stuck in your work or your private project. There is
always time for some laughs! And yes, it is an electronic forum, but after
almost 850 messages this month, what's 4-5 non-electronic posts
?
?
Good
luck finding a group that fits your need Michael.
?
Mounir
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Re: Bomb
Jim Purcell
Michael,
As much as I have enjoyed this group, I am going to unsubscribe. ThisSobb, Sobb, poor Michael, it just stared and I have only seen two or three messages. You must not care about electronics that you'd unsubscribe over three messages. Jim |
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Re: Bomb
Michael Warner
As much as I have enjoyed this group, I am going to unsubscribe. This
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seems to be a very inappropriate subject material. I was hoping for a legitimate discussion of electronics, but it turned out to be a group of bed-wetters discussing bombs and Jennifer Lopez. :-( -----Original Message-----
From: aconto [mailto:aconto@...] Sent: Wednesday, October 31, 2001 3:18 PM To: Electronics_101@... Subject: RE: [Electronics_101] Bomb Educational sake huh... well you know if I told you how to do something and you investigated we can both go to prison for conspiracy to commit even if we hadn't done anything. So you should reconsider asking such questions. Especially at times like this -----Original Message----- From: d nixon [mailto:dnixon9@...] Sent: Wednesday, October 31, 2001 2:13 PM To: Electronics_101@... Subject: Re: [Electronics_101] Bomb All my homeys tell me that Jennifer Lopez is the bomb. From: "angtengchat" <angtengchat@...> _________________________________________________________________ Get your FREE download of MSN Explorer at To unsubscribe from this group, send an email to: Electronics_101-unsubscribe@... Your use of Yahoo! Groups is subject to To unsubscribe from this group, send an email to: Electronics_101-unsubscribe@... Your use of Yahoo! Groups is subject to |
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Re: Bomb
aconto
Educational sake huh... well you know if I told you how to do something and
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you investigated we can both go to prison for conspiracy to commit even if we hadn't done anything. So you should reconsider asking such questions. Especially at times like this -----Original Message-----
From: d nixon [mailto:dnixon9@...] Sent: Wednesday, October 31, 2001 2:13 PM To: Electronics_101@... Subject: Re: [Electronics_101] Bomb All my homeys tell me that Jennifer Lopez is the bomb. From: "angtengchat" <angtengchat@...> _________________________________________________________________ Get your FREE download of MSN Explorer at To unsubscribe from this group, send an email to: Electronics_101-unsubscribe@... Your use of Yahoo! Groups is subject to |
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Re: Bomb
Mounir Shita
¿ªÔÆÌåÓýAnd
with how little we know about cloning, you won't be able to "make"
her!
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Re: Bomb
d nixon
All my homeys tell me that Jennifer Lopez is the bomb.
From: "angtengchat" <angtengchat@...> _________________________________________________________________ Get your FREE download of MSN Explorer at |
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Re: A hopefully simple transistor question
It wasn't Dr. Kelly was it?
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--- In Electronics_101@y..., "G Ramasubramani" <grama@a...> wrote:
Do you remember the name or author of the text that you used? We |
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Re: Fw: communication concepts ??
Jim Purcell
adityan,
was surprised when I told himWell, there are two factors, what the modulationthat an AM radio station could modulate up to +/-I also cannot wonder less. How is that possible?? frequencies the transmitter is capable of and what bandwidth the FCC allows. Both are +/- 15 kHz in most cases. How can this be, simple, stations are never assigned frequencies close enough to interfere. You won't have one station at 1000 kHz and a near by one at 1010 kHz or 990 kHz, and probably none at 1020 or 980. Jim |
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Re: Fw: communication concepts ??
Hi,
You said, was surprised when I told him that an AM radio station could modulate up to +/-I also cannot wonder less. How is that possible?? Please explain. Thanx, Aditya |
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Re: Parallel Port Interfacing
Hi,
--- In Electronics_101@y..., "Jonathan Luthje" <jluthje@p...> wrote: Aditya,ways around your particular issue.There r some requirements of the board. If we can sqeeze out the maximum performance from the parallel port the better. We are involved in BIDIRECTIONAL TRANSFER HERE. Now we don't want to use centronics mode becoz it is unidirectional only and we don't want ECP as it requires software compression and commensurate decompression. So we r left with EPP. Now let me repeat the question: whether I would require an ASIC to control the protocol or should the FPGA take care of it?? thanx, Aditya |
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Re: Fw: communication concepts ??
Doug Hale
Mixers are just analog multipliers, that is about as linear as it gets.
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The Radio ether is just one big summing junction (with distance related attenuation). It is not exactly like there is a 50Mhz signal, and a 50.5 Mhz signal, and a 51Mhz signal, ...There is only one signal - that is the sum of all the signals being transmitted. That signal has a 50Mhz component, a 50.5Mhz component, a 51Mhz component, ... Let me show you an example of this: A square wave is a single signal - or waveform. Yet it consist of many frequency componts. The equation for the voltage of the square wave at any given time is actually a summation of all the frequencies of the square wave. The equation is: sin(wt) - sin(3wt)/3 + sin(5wt)/5 - sin(7wt)/7 + sin(9wt)/9 - sin(11wt)/11 ... w = 2 Pi f Pi is 3.141576... f is the base frequency of the square wave t is time The ... at the end of the equation indicates that this is an infinate series - it goes on for ever. Now, if I were to build a filter that only allows sin(7wt) to pass, I would get a sine wave that is 7 times the frequency of the square wave. This is call fourier analysis - which is frequency domain in stead of time domain. In time domain, we concern our selves with what a voltage or current is at a given time. In frequency domain, we concern ourselves with the current or voltage at a given frequency. So when we talk of the radio ether having different frequencys - a 50Mhz, a 50.5Mhx, a 51Mz, ... we aren't actually that far off - we are just talking in frequency domain terms instead of time domain terms. Why do we use frequency domain insead of time domain? I bet most of you have not yet got your head around the square wave example but you all have a working knowledge of radios - you can tune them to a station of your choice. We use frequency domain because it is much easier. If you want to prove the above square wave example to yourself, search the web for a program called GNUPLOT. Install it and play with it. Doug Hale Jim Purcell wrote: adity,About the question "why waves don't mix up?"The original issue was whether various natural e.m. waves, i.e |
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Re: some observations
Hi,
You said, Wave A + Wave B = Wave (A+B) = Wave A + Wave B.what about Interferance???? Which as u might be knowing occurs if the two waves are superimposed upon each other with phased out then you get a pattern of high and low. This occurs even in case of light waves. So it must occur in modulated electromagnatic waves. Secondly, if so called waves don't mix up then what about environmental noise that corrupts the signal?? regds, Aditay. |
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Re: Fw: communication concepts ??
Jim Purcell
adity,
About the question "why waves don't mix up?"The original issue was whether various natural e.m. waves, i.e light, etc. don't mix. And they generally don't I think. What you are talking about is modulation, as with an AM transmitter. And even then the carrier wave is preserved. You have the carrier wave, the frequency that the station advertises, plus multiple side bands that are at frequencies equal to carrier +/- the audio frequency. I recall my office mate at the college where I taught, the same one who told me that a capacitors charge resides in the dielectric rather than the plates, by the way, was surprised when I told him that an AM radio station could modulate up to +/- 15 kHz from the carrier. He thought that the ten kHz spacing of radio station's meant that they were limited to +/- 5 kHz. So e.m. waves can get mixed or they can stay separate, depending on the conditions. It is my understanding that the mixing requires non linearity of the medium or device through which they pass, i.e. a vacuum tube, a transistor, even a diode. Jim |
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Re: from electronics and computer engineers association
Jim Purcell
ron,
kindly send a responce so that i know what otherThe fact that you have sent a message means you are in the group. You will receive all messages as email, reply or not as you wish, just like any email. You can go to the Yahoo groups site to read past messages or to change your preferences. Just follow the menus. Jim |
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Re: electric welding
Jim Purcell
Sunantoro,
By connecting three batteries of larger amperage say 60, we can make our ownI'm not sure I would want to use batteries for welding. First off I don't think a 60 Amp capacity is enough. Secondly lead acid batteries produce hydrogen. Can you say 'Hindenberg' boys and girls? To be honest, I have never had a need to do any arc welding so I have never investigated that option. Jim |
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