You do have a vested interest in drawing that implication - I've no doubt that the 555/7555 would be your chip of choice, since you rarely seem to use anything else, and you may even believe that you've made a reasoned choice - but you happen to be wrong.
By not drinking the second bottle of chardonnay before you started work on the job ...
Since we don't agree on what "better suited for the application" might mean - you still seem to think that cheaper and smaller wins every time
- this is just bullshit.
You want me to play by your dim-witted rules, so you can claim a win - tough luck.
The challenge, in this particular instance, was to give useful advice to a newby, and you seem to think that telling him the name of the cheapest, smallest part that will do the job is the only appropriate response.
As I've said before, you've got a very narrow idea of what constitutes professional design.
You are the chump - if using a 555 or 4047 to generate a narow pulse every few seconds doesn't look trivial to you, you shouldn't be posting on sci.electronics.design - get back to sci.electronics.basics where you might fit in better.
Which is? John Fields is trying to claim that applying high-volume-production design constraints to one-off circuit design is "professional" and I'm pointing out that it is inappropriate to the point of being moronic.
--
While the generation of the pulse using either a 555 or a 4047 may
be trivial, it seems that the minutiae involved in choosing between
the 555 and the 4047 isn\'t.
"John Fields" schreef in bericht news: snipped-for-privacy@4ax.com...
For a one-off, I'd use a 4538 ;) Or no, probably an 8 pin PIC. If I were asked to make a 100.000 units, I'd use nothing and send them straight to Joerg.
--
Thanks, Frank.
(remove \'q\' and \'.invalid\' when replying by email)
Not the 4066 but the 4060 - not an eror that one would expect a "professional" circuit designer to make.
One-shots using spare gates tend to e pretty horrible because the thresholds are poorly defined - HC and B CMOS is better than TTL and Schmitt trigger inputs are better than regular gates, but they all tend to show in gadgeteer electronics rather more frequently than in professionally designed gear.
When I do post technical stuff, it does seem to go over your head. The Baxandall Class-D oscillator isn't a circuit that I'de expect you to be at home with. You don't show up in the threads about using MC100E016 ECLinPS counters to set up wide synchronous counters that can run at
500MHz, and I've not seen you posting on the threads where I recommend the BFR92/BFT92 5GHz NPN/PNP transistors.
The problem isn't with the technical stuff I post, John but in your rather restricted range of interests.
Your memory is a defective as your reasoning power. Try searching Google Groups with "Bill Sloman"and "apologise". When you have done that you can apologise to me.
Your opinion of whether I'm wrong or not isn't one that carries much weight.
Tunnel vision.
You think that the 555 is easy to use and understand, because you have been using it for years. You make the 555 astable by adding an extra resistor and linking the trigger input (pin2 ) to the "threshold" input (pin 6) - not a particularly intuitive mechanism.
The astable waveform has a longer high period than the low period - you can get the 5% duty cycle that the OP (prateek) asked for by making Ra
19 times bigger than Rb, but you can't use that waveform to trigger a second 555 programmed as a monstable because - as a monstable, the 555 only triggers on falling edges, so that two 555 won't do the OP's job - you'd need three (or some kind of inverter - I'd just use a transistor, but that would probably frighten a newbie)
On the 4047 you just link a bunch of pins (listed in the data sheet) to Vdd or Vss to make the thing run as an astable - it only gives you a
50% duty cyce waveform, so you still need two monostables to get the pulses the OP was asking for, but with the 4047 you get both true and inverted output pulses and there are both positive-going a negative-going trigger inputs, which makes life easier.
If you are so fond of - and expert about - the 555, how come you missed the problem with the astable waveform output?
On 10 Jul 2006 09:28:02 -0700, snipped-for-privacy@ieee.org Gave us:
You're an idiot. A 555 is the very thing to use for pulse generation within the scope of its capability (slew rate).
As far as a total twit like you having any clue as to where I would fit... You don't.
As far as triviality goes, you have spent several hours of your time posting utter crap in this thread, all just because you do not want to actually address the stated issue. No pathetic lame excuse like "It's beneath me", or "You're a featherweight" is gonna pull your lame ass out of the barrel it currently resides in.
You could have addressed the debate several times over, with the total SHIT you have posted several hundred lines of thus far.
On 10 Jul 2006 09:28:02 -0700, snipped-for-privacy@ieee.org Gave us:
There are no constraints. The 555 is actually MORE Available to a "one off" turkey.
It is, in fact, one of the most available chips there is.
So, with that pathetic CRAP out of the way... It IS a better choice for the task at hand. PERIOD.
If you f****ng dispute that, retard, STATE WHY! It really is that simple. Your current argument about petty bullshit about "a one off" compared to "a production level run" is 100% horseshit.
Once again you display your never ending ignorance of America and what goes on here. There are no drunks at these ceremonies which are to remember those who gave their lives in service to our country. There were over 500 school children there to observe the ceremony this past November. We also had several groups like The Young Marines, Jr. ROTC and other youth groups. This are chartered to teach discipline and teamwork plus a lot of the groups do volunteer work for people in need. I guess that the difference in our cultures. We are thankful to those who are willing to die for their fellow citizens.
On the other hand, I guess that you have never experienced anything where mind altering substances were not in heavy use.
As far as politicians dealings with Veterans issues, you show even more of your famous lack of knowledge. Our Veterans don't get drunk and complain, they get busy and get things done.
The only drunk there would be you.
Gee, you'll never know, because you were too damn lazy to even find out.
Some links that you are probably too lazy to check out:
formatting link
formatting link
formatting link
--
Service to my country? Been there, Done that, and I\'ve got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
When I start my own country, my flag is going to be a roll of toilet paper.
That way, everyone can go back to tearing pages out of the Sears catalog to wipe with.
Or else I'm filing charges.
-- Paul Hovnanian mailto: snipped-for-privacy@Hovnanian.com
------------------------------------------------------------------ Opinions stated herein are the sole property of the author. Standard disclaimers apply. All rights reserved. For external use only. If irritation, rash or swelling occurs, discontinue use immediately and consult a physician. Void where prohibited.
There aren't at the Australina equivalents either. The drinking goes on after the ceremonies.
Sure. This is actually rather nasty. The military exists to train and organise people to kill other people - it isn't everything they do, but it is their core function - and disguising them as some kind of Woodcraft Folk to suck kids in is a prety low kind of recruiting strategy.
Not very - and your disadvantaged social groups are heavily over-represented in your military forces, in part because your society offers the disadvantaged the unsavoury bargain of teaching them a trade if they will are willing to risk getting shot in Irak (or some equally dangerous area).
I don't like getting drunk, and I don't like the way people (including me) behave when drunk.
They didn't manage to elect Kerry (the veteran) or throw out Dubbya (the draft-dodger).
I don't get drunk.
Not quixotic enough, actually - I worked out what I'd need to do, and decided that the chance of success was too low to risk getting widely known as someone who didn't appreciate the facts of Dutch employment practices.
My sister-in-law was a senior administor in the Australian equivalent before she took early reitrement a few years ago.
So you are a disabled American Veteran. You've got my sympathy, for what it is worth, but the system that disabled you isn't one that can command any respect at all. It works, but there do seem to be systems that work better, while killing and disabling fewer people.
Disadvantaged social groups are *always* heavily over-represented in any military force. It's not really a very nice career - it makes a great deal of demands on you physically, mentally and socially, and pretty much removes you from normal life. For countries like the US that like to get involved in wars, it's also pretty dangerous (for more pacifist countries like Norway, it's a lot less dangerous than being a builder or a farmer). And if you go to war, there's a pretty good chance that you'll find out you were fooled and fighting for politics or money, rather than to defend your country and people. When you get back, you have the joys of veteran life to look forward to, including post-traumatic stress, long-term health problems from the DU munitions and other nuclear or chemical weapons you've been using, disabilities (far more with this war, as the combination of body armour and better medical treatments keep you alive despite missing bits), fights over pensions. All in all, it's not a great choice if you are capable of a different career.
On the other hand, baring war time, it's a pretty good option if you are "socially disadvantaged". For lowly grunts, there is not much call for intelligence, you get as much training as you can handle (some of which can be useful in later civilian life), and for many, the military can provide stability and a surrogate family that is missing from their lives. You don't have much responsibility, and the day-to-day chores of living, such as dealing with money and bills, keeping a house, etc., are pretty much taken care of. Even with the Iraq war, for many the benefits outweigh the risks.
Sure it was, Fuchwit, but he didn't catch it when he re-read the posting before committing it. "4066" means "transmission gate" to me, and "4060" means "funny counter" as they do to anybody who has done much with CMOS.
I do know that a one-shot made from a TTL gate has a 10:1 worse case tolerance on the pulse width - I regularly forced junior engineers to work through the exercise when they wanted to use this kind of one-shot, as well as pointing out that they are usually better ways of dealing with race conditions. There are places where such a monostable might be right answer, but they look horribly non-professional. TTL is the worst case example - I've already listed the pecking order, which might have suggested to a more pereceptive reader that I did know something about improvised one-shots.
Sure, and pigs might fly.
Lack of data-mining skills? Or lack of intellectual honesty? Stupidity is always the the more persuasive explanation. Dumbo.
What you are expressing is your opinion. If you could come up with some persuasive evidence, you'd have some claim to a justified opinion.
You've been in love with the 555 for many years now, and you are - I'm afraid - blind to its obvious faults. You certainly missed one in your post on the 24th June 2006.
You were planning on using a film capacitor with your 555 anyway.
You claim to get $2 per minute of design time. How much design time did you spend on dealing with the little problem that the 555 as an astable doesn't produce the trigger pulse edge where you need it? You can buy a lot of cheap timers for tha kind of money.
In the beginning I said it could be done with three one-shots, and it can be done - you've got to work in some way of getting the system started, so an astable and a one one-shot is nicer.
The 555 is a handy astable for the job if - and only if - you can live with a 95% high, 5% low waveform, so the OP's "first"pulse is negative-going. You can't directly use it trigger a second 555 wired as a monstable without addiing an extra component.
This is not what you claimed in your original response Sat, Jun 24 2006
2:41 am
"--- One astable and a single one-shot will do it:
Your total lack of understanding is truly underwhelming. You are beyond any help, now that advanced brain rot has set in. You show less intelligence than Rich Grise, which is nothing to brag about.
You know absolutely nothing about the mission of our military. Did you know that a full 80% of the US troops on the ground in Europe during WW II never fired a shot on the battlefield? I'm sure that you'll have some BS lies about that fact, as well.
--
Service to my country? Been there, Done that, and I\'ve got my DD214 to
prove it.
Member of DAV #85.
Michael A. Terrell
Central Florida
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