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Parallel Port Interrupt
Hi,
In EPP mode if the peripheral wants to communicate something to the PC, is there a way to interrupt the PC?? Though there is an interrupt bit defined in the standards, Control Port bit number 4 called Enable Interrupt Request; I am not finding any resources on the perticular thing. Can somebody tell me sources describing SPECIFICALLY ABOUT PARLLEL PORT INTERRUPT?? Please don't give me some sites giving BASIC information. I want specifically PARALLEL PORT INTERRUPT. Thanx in advance. Aditya N. |
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Re: Parallel Port Interfacing
Hi,
--- In Electronics_101@y..., "manifold" <manifold_1@y...> wrote: Are you considering designing an ASIC to communicate with theYes. We r communicating with Parallel Port of PC. BTW somebody was asking for more information about this. So here goes: There is FPGA on the board which will be interfaced to PC by parallel port. This requirement of Parallel Port interface cannot change. Now we r configuring this FPGA means that there is about 2 MEGABITS of data to be transferred really fast. We r using EPP mode for the transfer. The FPGA will be configured and give the output back to parallel port. Now will I require an ASIC to control the communication between FPGA and Parallel Port?? regds, Aditya. unidirectional only and we don't want ECP as it requires software compression and |
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Componet values for Switch mode power supply?
gt bradley
For various reasons, I have decided to build a "simple" buck regulator
aka ripple regulator. I believe I can come up with decent choices for the comparator, the FET and various resistors, This leaves choosing values for the Cap and the inductor. It seems that since my references have calculations that are "tuned" to power supplies frequency, (which makes a lot more sense on a PWM P/S) Since changing the values, will change the frequency, I'm guessing at the process. Is it reasonable to derive a frequency calculating the oscillation with no filtering (just the delays in switching), and then add components for those values, (even though they will slow the oscillation down?). or would I calculate one component, then the other, then recalculate the first, going back and forth until the change in value is less than some epsilon? Is their an easier way? I'll play with the numbers this week-end. GT |
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Re: LM3914 vs LM3915 vs LM3916
Curtis Sakima
Oh, I see what you're doing! :)
Yeah, I think the 3914 (in my opinion anyways) would probably be your best bet. However, it's not "because you want to measure voltage". It's 'cause of the CALIBRATION. Maybe an example would be in order. If you were to use a 3914, engine idle would be, for example, one LED being on. Move the throttle up, let's say, a 1/4 inch ... and another LED pops on. Another 1/4 inch ... another LED. Another 1/4 inch ... another LED. And so on. Until at full throttle, all the LED's are on. With the 3915 / 3916, the circuit would "still work". In a sense that the "more throttle = more LED's". It's just that the number of LED's per 1/4 inch would not remain the same as the pot slid up. From zero to 1/4 ... from 1/4 to 1/2 ... from 1/2 to 3/4 ... it would take more and more pot sliding to get "one more" LED to switch on. Curtis --- battmain@... wrote: Curtis, that was me asking. Basically I was askingif there was any benefit of one over the other. The original plan was to drive a few (10-15) LEDs as a throttle position indicator by using a linear slide pot to change the reference voltage. Now with your explanation, it seems the 3914, wouldbe the chip to use since I want to measure voltage? ===== * * * * Your website deserves a taste of rush hour traffic * * * * * * __________________________________________________ Do You Yahoo!? Find a job, post your resume. |
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Re: Bomb
Jim wrote:
--- In Electronics_101@y..., Jim Purcell <jpurcell@w...> wrote: angtengchat,progress.< I have stated before that I am not for censorship in any form. and a list group is an extension of the house/home of the list owner.That is why most mailing lists and many newsgoups are moderated. There are often individuals who can't stay on topic, attack people rather than the position they take, argument for arguments sake and strip the list of its direction and focus. There are lists were they are welcome. They should be first warned and then removed when failing to follower the moderators instrutions, right or wrong. Best regards, Don Living in the Philippines Where the Mountains Meet the Sea Where the Mountains Meet the Sea In the Land of Smiles |
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Re: Bomb
Jim Purcell
angtengchat,
< I have stated before that I am not for censorship in any form.It is not censorship to restrict what people say in your own house and a list group is an extension of the house/home of the list owner. So called free speech does not exist here. Not any more than it does in ones home. If you were a guest in a home and you started saying nasty things to the persons wife or children or talking dirty jokes, or for that matter, just bored everyone to tears the home owner could toss you out on your ear. The same is true of a list group. Jim |
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Re: Fw: communication concepts ??
Jim Purcell
angtengchat,
Will there be another similar progress this century, depends on howToo bad we can't do something about the terrible things humans do to each other. That and the fact that some people seem far less able to deal with the evil they encounter, without inflicting even more evil on other innocents. Jim |
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Re: Not amused (was - Bomb)
Jim Purcell
Jonathan,
Does this sound like "censorship" to anyone else but me? A blatent attemptI would be careful, you are a guest in this list just as I am and anyone else. The owner can kick you out. Censorship does not exist as a concept in a private group, which is what this is. I you don't like it go to some group where they let you talk about anything you want. Jim |
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Re: Energy
Windmills are not necessarily electonic. They have been around for
hundreds of years, long before electronics. --- In Electronics_101@y..., "angtengchat" <angtengchat@y...> wrote: ----- Original Message -----with 200 -electronics?generators is electronics, solar panels is electronics, windmills is 300us howyrs from now. sources.energy could be tap from the sky (solar energy) or some other
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Re: Not amused (was - Bomb)
angtengchat
So in short - you won't have to "take furthur action" - because I'mPlease let me know if you found one, I would like to join you too. Thanks ----- Original Message ----- From: "Jonathan Luthje" <jluthje@...> To: <Electronics_101@...> Sent: Friday, November 02, 2001 9:29 AM Subject: [Electronics_101] Not amused (was - Bomb) toI am the owner of this list. ask for - several of us have already stated that we will not answer the _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at |
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Re: Bomb
angtengchat
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----- Original Message -----
From: "Peter tremewen" <Ptremewe@...> To: <Electronics_101@...> Sent: Thursday, November 01, 2001 5:58 PM Subject: Re: [Electronics_101] Bomb For those of you who do not know Who I am, I am the owner of thisI assure you that you have my respect for your decision. In fact, you should not say that "This subject is OFF TOPIC", it should be "This subject is Not Allowed". There are young members on this group, I do not wish them to think that itis necasary to know this sort of information.In education, one should not retard dissemination of information. No one should be deprived from further studies of atoms, nucleus, neutrons, phobes and one cannot pretend to hide the fact that in the process of learning, scientific questions would be probe! As an educator, is it right to shut the mouth of a young student if he/she ask questions like "Teacher, how does nuclear bomb works"? < I have stated before that I am not for censorship in any form. Well you have done it now, and its a censorship that retards progress. < However I do not consider this subject suitable material for this forum. We have already lost at least one < member becuase of this topic, and I personally feel this is one too many, regardless of how many posts they may have made.To close a topic just because this forum lost a membership, then I'm afraid all topics will have to closed. I hope that this will end the discusion and I will not have to takefurther action. "and I will not have to take further action." is a threat, and worst of all, this is an justifiable threat. Having read my replies, you should know that I dont bow down to threats. However, since you are in charge here, that leave us choiceless but to "listen" to you. Simple as that. Hey, Just because I'm EVIL,Although I understood what you meant, I doubt young people would. I therefore advice you to delete the above signature, less you confuse the minds of the young. Without prejudice & most Constructively Thank You. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at |
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Re: Energy
angtengchat
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----- Original Message -----
From: "d nixon" <dnixon9@...> To: <Electronics_101@...> Sent: Friday, November 02, 2001 6:25 AM Subject: Re: [Electronics_101] Energy Yeah, solar...wind...geothermal. But what does this have to do withgenerators is electronics, solar panels is electronics, windmills is electronics ...... just in case you may not know. 300From: "angtengchat" <angtengchat@...> yrs from now. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at |
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Not amused (was - Bomb)
Jonathan Luthje
I am the owner of this list. I hope that this will end the discusion and I will not have to takeDoes this sound like "censorship" to anyone else but me? A blatent attempt to force a topic off the list without so much as a peep. I think that we are all big people who have more sense than to discuss a topic such as this in depth without having to be *forced* to taboo it because of the "list nazi". However giving a definition is not too much to ask for - several of us have already stated that we will not answer the question because it is "off topic". Oh ... and BTW - an EFI system as used in automotive electronics is a type of detonation controller as well ... can't discuss that either, I take it? So in short - you won't have to "take furthur action" - because I'm unsubscribing - to find a group that allows it's members to make it's own decisions. Cordial Regards, Jon |
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Re: International agreement on allocation of frequencies.
angtengchat
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----- Original Message -----
From: "Jim Purcell" <jpurcell@...> To: <Electronics_101@...> angtengchat,notIs there an international agreement whereby each radio / tv station from That was what I thought too, I asked because my mind was hazy then. Thanks"clash" with each other?Yes, each country has allotted bands, sometimes shared. for putting this rubber stamp. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at |
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Re: newbie inquiry
angtengchat
<I would favor a law that says a person who goes through that once
automatically has his sentence commuted to life... without parole.I raise my hands to second Jim's proposal. Although the person has done wrong and we would not like his / her presence on earth in the name of Justice and as a warning to others, I personally feel that a person should be punished only once. Unfortunately, electrocution does not do that, sometimes it punishes the offender many times, it's a terrible trauma to the accused family. Electrocution, like torture, should be used only if the Authorities concerned wishes to use it intentionally as a deterrant, as in this case, stoning to death by the public would be a better choice. ----- Original Message ----- From: "Jim Purcell" <jpurcell@...> To: <Electronics_101@...> Sent: Friday, November 02, 2001 1:11 AM Subject: Re: [Electronics_101] newbie inquiry angtengchat,bodyDiscarding time factor, in short, it is the current passing thru that peoplethat electrocute that person.Yes, I agree, especially at higher voltages. OTOH look at how long some take to die in the electric chair. And when there are problems sometimes afavor a law that says a person who goes through that once automatically has his _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at |
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Wiring question
I finished painting a ceramic lighthouse and drilled a hole in the
base so that a small light could be fitted and light up the top of the lighthouse. A cord was purchased that has an attached socket, but was told that wires have to be connected within the cord. Any ideas on how I can proceed with this?? Thanks a bunch! |
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Re: Fw: communication concepts ??
angtengchat
You are a great man Doug! May I take this opportunity to wish you all the
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best. Although I've learnt many things myself, unfortunately I did not seek to master them, I'm therefore a "Jack of many trades but master of none". DNA, is a real thing, I doubt my characteristic will change. The turn of the previous century ( 1899 to 1900's) saw a tremendous-remarkable change, one that wipes out progress since the existance of life, in the way mankind lived because of the discovery and aggressive-scientific progress on the understanding of electricity. Will there be another similar progress this century, depends on how successful scientist persue and "tear apart" DNA, the study of life-science. It's an un-imaginable thing to think of the integration of electricity-electronic-artificial intelligence-DNA. ----- Original Message -----
From: "Doug Hale" <doughale@...> To: <Electronics_101@...> Sent: Thursday, November 01, 2001 11:38 PM Subject: Re: [Electronics_101] Re: Fw: communication concepts ?? I wouldn't let that stop me, I have the degree but I don't work in that _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at |
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