| Scrolling Message in LED Display with 8051?? | | 01/01/70 00:00 |
| 2 separate problems | | 01/01/70 00:00 |
| the simple way | | 01/01/70 00:00 |
| didnot get you | | 01/01/70 00:00 |
| Standard circular buffer | | 01/01/70 00:00 |
| Thanks | | 01/01/70 00:00 |
| Flickering in scrolling | | 01/01/70 00:00 |
| Clip to viewport | | 01/01/70 00:00 |
| Testing on 8x8 display. | | 01/01/70 00:00 |
| Write fastest loop and count instructions | | 01/01/70 00:00 |
| Any other suggestions | | 01/01/70 00:00 |
| yes and no | | 01/01/70 00:00 |
| Frankly speaking | | 01/01/70 00:00 |
| time, time, time | | 01/01/70 00:00 |
| You should investigate old-style monochrome video adapters | | 01/01/70 00:00 |
| but pretty close | | 01/01/70 00:00 |
| not wishing to start a debate ... | | 01/01/70 00:00 |
| pixel rate | | 01/01/70 00:00 |
| Yes, that's true, but it's irrelevant | | 01/01/70 00:00 |
| Persistence matters, and algorithm | | 01/01/70 00:00 |
| I believe there's a difference in approach here | | 01/01/70 00:00 |
| Shift registers to drive rows, not columns. | | 01/01/70 00:00 |
| ...which is why they don'tfit this sort of application | | 01/01/70 00:00 |
| Think about pulse quota when multiplexing | | 01/01/70 00:00 |
| Yes, the multiplexing affects ultimate brightness ... | | 01/01/70 00:00 |
| never heard of 2 lines??? | | 01/01/70 00:00 |
| Yes, but most people can only read one at a time | | 01/01/70 00:00 |
| 16 pix | | 01/01/70 00:00 |
| It's news to me ... | | 01/01/70 00:00 |
| Good with forums | | 01/01/70 00:00 |
| Do you mean a REGISTERED shift register? | | 01/01/70 00:00 |
| Yes | | 01/01/70 00:00 |
| Absolutely! | | 01/01/70 00:00 |
| never seen one | | 01/01/70 00:00 |
| That's the answer i was looking for... | | 01/01/70 00:00 |
| one can change the colour on an LED | | 01/01/70 00:00 |
| a monochrome display has one LED per pixel | | 01/01/70 00:00 |
| It is seldom so simple as one would like | | 01/01/70 00:00 |
| I too read 8x8 as pixels/LEDs. However, probelm with scroll | | 01/01/70 00:00 |
| Please leave that CRT | | 01/01/70 00:00 |
| But we area focused | | 01/01/70 00:00 |
| Chequebook time! | | 01/01/70 00:00 |
| You haven't told us anything useable! | | 01/01/70 00:00 |
| The Information | | 01/01/70 00:00 |
| The Information | | 01/01/70 00:00 |
| Mr. amir | | 01/01/70 00:00 |
| The Information | | 01/01/70 00:00 |
| The Information | | 01/01/70 00:00 |
| The Information | | 01/01/70 00:00 |
| Quoting Andy on this | | 01/01/70 00:00 |
| re the rating of "Quoting Andy on this" | | 01/01/70 00:00 |
| LOL | | 01/01/70 00:00 |
| It was me, Per... | | 01/01/70 00:00 |
| Feedback | | 01/01/70 00:00 |
| I agree with you in all points, but... | | 01/01/70 00:00 |
| I agree, Kai --- in most cases ... | | 01/01/70 00:00 |
| Kick-starting threads do require some form of pushing | | 01/01/70 00:00 |
| That will be UGLY | | 01/01/70 00:00 |
| Not necessarily... | | 01/01/70 00:00 |
| That is not ALL the information. | | 01/01/70 00:00 |
| Looked at circular buffer yet? | | 01/01/70 00:00 |
| Has anyone looked at Allegro? | | 01/01/70 00:00 |
| A specific chip for the shift-register solution | | 01/01/70 00:00 |
| Think about total power loss | | 01/01/70 00:00 |
| you tell me | | 01/01/70 00:00 |
| the A6833 and similar offerings | | 01/01/70 00:00 |
| Code, problem, information and schematic. | | 01/01/70 00:00 |
| BU4094 is fast enough, but... | | 01/01/70 00:00 |
| look at 74HC595 | | 01/01/70 00:00 |
| Yes, and not to forget the 74HC4094... | | 01/01/70 00:00 |
| and 80 resistors | | 01/01/70 00:00 |
| Mickey Mousing?? Availibility! | | 01/01/70 00:00 |
| my absolute impression ... | | 01/01/70 00:00 |
| Almost total silence | | 01/01/70 00:00 |
| ?? | | 01/01/70 00:00 |
| How to activate Aamir? | | 01/01/70 00:00 |
| I don't want to activate Aamir! | | 01/01/70 00:00 |
| Yes, most comments here are free-running without the OP | | 01/01/70 00:00 |
| Maybe the wrong sorts of questions were asked | | 01/01/70 00:00 |
| Let's see what the O/P wants to do | | 01/01/70 00:00 |
| with the amount of effort the OP shows .... | | 01/01/70 00:00 |
| What you have failed to consider ... | | 01/01/70 00:00 |
| did you read | | 01/01/70 00:00 |
| Yes, I did! | | 01/01/70 00:00 |
| And my absolute impression is... | | 01/01/70 00:00 |
| why should I do that? | | 01/01/70 00:00 |
| I have to agree | | 01/01/70 00:00 |
| What does it cost? How many would be needed? | | 01/01/70 00:00 |
| Exactly! | | 01/01/70 00:00 |
| ST2221 EQUIVALENT | | 01/01/70 00:00 |
| It's not widely available in the developing world | | 01/01/70 00:00 |
| Max power loss at high ambient temperatures | | 01/01/70 00:00 |
| Interesting point ... but ... | | 01/01/70 00:00 |
| 8- or 16-bit drivers for different applications | | 01/01/70 00:00 |
| because | | 01/01/70 00:00 |
| Is this a chicken and egg sort of question? | | 01/01/70 00:00 |
| Different chips for different problems | | 01/01/70 00:00 |
| no, applea and oranges | | 01/01/70 00:00 |
| Isn't that a design parameter? | | 01/01/70 00:00 |
| Physics and practical realities | | 01/01/70 00:00 |
| In some cases, perhaps LED's are not the right technology | | 01/01/70 00:00 |
| and what does all that to do with .... | | 01/01/70 00:00 |
| They have to remain within specified limits. | | 01/01/70 00:00 |
| Still missing muxed concept | | 01/01/70 00:00 |
| No ... I'm not missing the concept ... | | 01/01/70 00:00 |
| yes you are | | 01/01/70 00:00 |
| You're thinking too narrowly, methinks. | | 01/01/70 00:00 |
| no, you are muddling | | 01/01/70 00:00 |
| It's just another way to manage a big sign | | 01/01/70 00:00 |
| not so, back at ya | | 01/01/70 00:00 |
| PWM or shorter on times. | | 01/01/70 00:00 |
| There's more than one way to skin a cat | | 01/01/70 00:00 |
| Start producing signs. | | 01/01/70 00:00 |
| Those arguments are weak! | | 01/01/70 00:00 |
| not for those that have an inkling of understanding | | 01/01/70 00:00 |
| So ... how fast can you clock 'em? | | 01/01/70 00:00 |
| if you had read and not muddled.... | | 01/01/70 00:00 |
| Not Bad ! That IS a lot more reasonable! | | 01/01/70 00:00 |
| why on earth would you want to do that | | 01/01/70 00:00 |
| If a little bit is good, sometimes more is better ... | | 01/01/70 00:00 |
| you might, I wouldn't | | 01/01/70 00:00 |
| I can envision such a thing ... but I don't build signs | | 01/01/70 00:00 |
| I feel the need to SHOUT | | 01/01/70 00:00 |
| Time to get back to scrolling | | 01/01/70 00:00 |
| as long as the CC drives one pixel | | 01/01/70 00:00 |
| Don't everyone love a DC-driven sign? | | 01/01/70 00:00 |
| In the interest of discussion ... | | 01/01/70 00:00 |
| get your head out of your .... | | 01/01/70 00:00 |
| consider ALL the alternatives ... | | 01/01/70 00:00 |
| Inkling? | | 01/01/70 00:00 |
| It comes down to why this is being discussed | | 01/01/70 00:00 |
| Where is the progress? | | 01/01/70 00:00 |
| Robert Erlacher ?? | | 01/01/70 00:00 |
| Oops | | 01/01/70 00:00 |
| Let's leave irrelevant issues out ... for now | | 01/01/70 00:00 |
| Quote examples | | 01/01/70 00:00 |
| No citation needed! | | 01/01/70 00:00 |
| ... about that schematic ... | | 01/01/70 00:00 |
| Still thinking single diode | | 01/01/70 00:00 |
| It doesn't HAVE to be done in a conventional granularity | | 01/01/70 00:00 |
| I do not think so | | 01/01/70 00:00 |
| One other thing ... | | 01/01/70 00:00 |
| THAT IS what PWM does | | 01/01/70 00:00 |
| For that, you don't need dedicated hardware | | 01/01/70 00:00 |
| never said so | | 01/01/70 00:00 |
| Give the customer value while making money | | 01/01/70 00:00 |
| A lot of intersting issues have been forced to the surface | | 01/01/70 00:00 |
| Go for KISS | | 01/01/70 00:00 |
| fruit salad | | 01/01/70 00:00 |
| Not exactly ... I think you're ignoring the point | | 01/01/70 00:00 |
| this is where you are confoosed | | 01/01/70 00:00 |
| There's nothing confusing about the procedure | | 01/01/70 00:00 |
| NO, NO, NO | | 01/01/70 00:00 |
| Yes, non-mpx is probably easier ... | | 01/01/70 00:00 |
| Resistor on varying-current side? Hot, hot, hot | | 01/01/70 00:00 |
| Please forget CRT | | 01/01/70 00:00 |
| why this complex, why so enamored by darlingtons? | | 01/01/70 00:00 |
| Of course, your Allegro thingis would perfectly fit... | | 01/01/70 00:00 |
| not the transistors, the ULN in the columns | | 01/01/70 00:00 |
| Back to square one. First experiment with fast output | | 01/01/70 00:00 |
| Power is not Sufficient | | 01/01/70 00:00 |
| Semi-correct | | 01/01/70 00:00 |
| Sorry guys | | 01/01/70 00:00 |
| Switch statement | | 01/01/70 00:00 |
| ULN2803 ???? | | 01/01/70 00:00 |
| WHY????? | | 01/01/70 00:00 |
| The 2803's OK ... with a current source Anode driver | | 01/01/70 00:00 |
| Yes, unless high cathode currents... | | 01/01/70 00:00 |
| If he's sinking current from, at most, 16 cathodes ... | | 01/01/70 00:00 |
| Not 16 at a time. 0 or 1 for column. 0..80 for row | | 01/01/70 00:00 |
| I got it from the O/P's first post | | 01/01/70 00:00 |
| But you don't do 80:1 | | 01/01/70 00:00 |
| I couldn't have said it better myself! | | 01/01/70 00:00 |
| Code hang-ups... | | 01/01/70 00:00 |
| Watchdog is nice | | 01/01/70 00:00 |
| not a 'bright' idea | | 01/01/70 00:00 |
| Yes, muxed displays requires high currents to not be dim | | 01/01/70 00:00 |
| which varies by a factor of 1:80 | | 01/01/70 00:00 |
| It's not dirt-simple, but it's not rocket-science, either | | 01/01/70 00:00 |
| first/second???? | | 01/01/70 00:00 |
| evidently it is | | 01/01/70 00:00 |
| I just came to think of this quiz | | 01/01/70 00:00 |
| Happy three months | | 01/01/70 00:00 |
| It didnot work for me again..... | | 01/01/70 00:00 |
| are you familiar with Ohms law | | 01/01/70 00:00 |
| Write test-code for driving the diodes | | 01/01/70 00:00 |
| I'm afraid to tell you,... | | 01/01/70 00:00 |
| Don't shift so much | | 01/01/70 00:00 |
| Yes, he must shift byte-wise... | | 01/01/70 00:00 |
| The alternative... | | 01/01/70 00:00 |
| Try this, Aamir... | | 01/01/70 00:00 |
| Thanks Sir....... | | 01/01/70 00:00 |
| I knew someone would do his work for him! | | 01/01/70 00:00 |
| Yes, and it was fun! | | 01/01/70 00:00 |
| Yes, of course ... but they were far too complex | | 01/01/70 00:00 |
| I'm really sorry that they were "far too complex"... | | 01/01/70 00:00 |
| one step at a time | | 01/01/70 00:00 |
| All many of these guys want is someone to do their work | | 01/01/70 00:00 |
| Big-bang | | 01/01/70 00:00 |
| Lessons learned | | 01/01/70 00:00 |
| Lessons... | | 01/01/70 00:00 |
| the difference | | 01/01/70 00:00 |
| He learns and learns and learns... | | 01/01/70 00:00 |
| that would be true | | 01/01/70 00:00 |
| That's the point... | | 01/01/70 00:00 |
| show me one | | 01/01/70 00:00 |
| Only feedback tells where the correct level is | | 01/01/70 00:00 |
| Knowledge is still the morst valuable gift | | 01/01/70 00:00 |
| You really never had a look at something bigger?? | | 01/01/70 00:00 |
| Read what I write, not what you want me to write | | 01/01/70 00:00 |
| Sorry, Per, but... | | 01/01/70 00:00 |
| Atleast give OP some time | | 01/01/70 00:00 |
| male cow manure | | 01/01/70 00:00 |
| This guy is a STUDENT! And probably a lazy one. | | 01/01/70 00:00 |
| Poor... | | 01/01/70 00:00 |
| It should be a career-ender | | 01/01/70 00:00 |
| Ignorance is bliss? | | 01/01/70 00:00 |
| Is this a Social Work forum? | | 01/01/70 00:00 |
| Is this a Social Work forum? - no | | 01/01/70 00:00 |
| ethical behaviour | | 01/01/70 00:00 |
| Good elbows... | | 01/01/70 00:00 |
| Some people are just lazy, and think they're entitled. | | 01/01/70 00:00 |
| Robots has no feelings | | 01/01/70 00:00 |
| Where do you put the limit? | | 01/01/70 00:00 |
| Its not the point | | 01/01/70 00:00 |
| Prove your point! | | 01/01/70 00:00 |
| point of disagreement ? | | 01/01/70 00:00 |
| Teflon-avoidance of arguments | | 01/01/70 00:00 |
| back to the old one | | 01/01/70 00:00 |
| There must be a willingness to do the work! | | 01/01/70 00:00 |
| a nasty thought | | 01/01/70 00:00 |
| by silence the OP has admitted | | 01/01/70 00:00 |
| He has admitted?? | | 01/01/70 00:00 |
| it is a known fact that | | 01/01/70 00:00 |
| Do you think, that I aggree if I don't reply... | | 01/01/70 00:00 |
| yes, IF | | 01/01/70 00:00 |
| It may not have been in this thread | | 01/01/70 00:00 |
| Plain bogus... | | 01/01/70 00:00 |
| School projects always problematic | | 01/01/70 00:00 |
| This is a recurring theme | | 01/01/70 00:00 |
| Regular on Keil too | | 01/01/70 00:00 |
| Well, too many components | | 01/01/70 00:00 |
| I was looking for a product I could buy, not a work-product. | | 01/01/70 00:00 |
| And still stuck on the basics | | 01/01/70 00:00 |
| This one's not too costly! | | 01/01/70 00:00 |
| Nice one | | 01/01/70 00:00 |
| facts | | 01/01/70 00:00 |
| Silence talks... | | 01/01/70 00:00 |
| It's because the due-date of his assignment has passed | | 01/01/70 00:00 |
| No the OP, but the two drive-by-shooters | | 01/01/70 00:00 |
| For Per Westermark | | 01/01/70 00:00 |
| "Drive-by-shooters"? Are you cuckoo?? | | 01/01/70 00:00 |
| I think that was the basic problem | | 01/01/70 00:00 |
| Yes, and as we do not know the state of knowledge... | | 01/01/70 00:00 |
| Once more you focus on bowing and other nonsense | | 01/01/70 00:00 |
| Do you feel better now?? | | 01/01/70 00:00 |
| Why? | | 01/01/70 00:00 |
| Answers... | | 01/01/70 00:00 |
| Try looking from the other direction | | 01/01/70 00:00 |
| Forum rules... | | 01/01/70 00:00 |
| Constant misunderstandings, or kicking in open doors | | 01/01/70 00:00 |
| bow? no, but questions should be answered. | | 01/01/70 00:00 |
| but we do | | 01/01/70 00:00 |
| Making mistakes and confusing things... | | 01/01/70 00:00 |
| Missing help? | | 01/01/70 00:00 |
| Why do you all the time interfere in... | | 01/01/70 00:00 |
| When we ask an O/P a question ... | | 01/01/70 00:00 |
| But that's it, Richard! | | 01/01/70 00:00 |
| You're right, Kai, but not in the way that you might think | | 01/01/70 00:00 |
| Can't see "not helped" | | 01/01/70 00:00 |
| I'm tired, Per... | | 01/01/70 00:00 |
| Weapons down Kai :) | | 01/01/70 00:00 |
| we all are | | 01/01/70 00:00 |
| we all are - | | 01/01/70 00:00 |
| So enumerate the factual errors then | | 01/01/70 00:00 |
| You were wrong | | 01/01/70 00:00 |
| I wish that someday ... | | 01/01/70 00:00 |
| I wish that someday ... Is that so | | 01/01/70 00:00 |
| And your argument was? | | 01/01/70 00:00 |
| Example | | 01/01/70 00:00 |
| Just curious | | 01/01/70 00:00 |
| No reverse way just wanted to show | | 01/01/70 00:00 |
| assisted != having others to do the job | | 01/01/70 00:00 |
| From this at least it dosent make | | 01/01/70 00:00 |
| Come on, now, Ap Charles ... | | 01/01/70 00:00 |
| Have you read what Aamir wrote? | | 01/01/70 00:00 |
| Yes, it looks like part of the assignment spec | | 01/01/70 00:00 |
| Assignment specs? Hardly... | | 01/01/70 00:00 |
| I guess we see different things in the quoted post | | 01/01/70 00:00 |
| These are good arguments... | | 01/01/70 00:00 |
| We'll never know for certain | | 01/01/70 00:00 |
| switch not the big problem | | 01/01/70 00:00 |
| Direct and Indirect calls | | 01/01/70 00:00 |
| Size of feet? | | 01/01/70 00:00 |
| I can see your point | | 01/01/70 00:00 |
| Probably yet another language problem | | 01/01/70 00:00 |
| The O/P has a part to play, as do we of 8052.COM | | 01/01/70 00:00 |
| Yes | | 01/01/70 00:00 |
| Oh dear, Per, please... | | 01/01/70 00:00 |
| In the eye of the beholder | | 01/01/70 00:00 |
Sorry, I didn't want to hurt you! | | 01/01/70 00:00 |
| again, it is obvious | | 01/01/70 00:00 |
| Not big-bang solution, but snippet of code! | | 01/01/70 00:00 |
| I'm not the only one who confuses things... | | 01/01/70 00:00 |
| Yes, language barrier | | 01/01/70 00:00 |
| Yes, it's true ... | | 01/01/70 00:00 |
| wrong question | | 01/01/70 00:00 |
