| BIG I/O expansion | | 01/01/70 00:00 |
| Like I said | | 01/01/70 00:00 |
| Carry on | | 01/01/70 00:00 |
| As i said before | | 01/01/70 00:00 |
| Fanout | | 01/01/70 00:00 |
| Great idea, but 2 things | | 01/01/70 00:00 |
| Thanx Sasha | | 01/01/70 00:00 |
| Why? | | 01/01/70 00:00 |
| Yep, nice guess | | 01/01/70 00:00 |
| outputs | | 01/01/70 00:00 |
| I really need'em and can't multiplex'em | | 01/01/70 00:00 |
| But why?? | | 01/01/70 00:00 |
| Can't you go serial? | | 01/01/70 00:00 |
| Serial?? | | 01/01/70 00:00 |
| output of a CPLD | | 01/01/70 00:00 |
| using CPLD outputs .. | | 01/01/70 00:00 |
| To buffer or not to buffer | | 01/01/70 00:00 |
| to buffer or not | | 01/01/70 00:00 |
| timing problems | | 01/01/70 00:00 |
| what on earth are you doing | | 01/01/70 00:00 |
| Exactly! | | 01/01/70 00:00 |
| complaints and more info. | | 01/01/70 00:00 |
| Don't worry | | 01/01/70 00:00 |
| Consensus - not conspiracy! | | 01/01/70 00:00 |
| Head Bashing | | 01/01/70 00:00 |
| Head banging | | 01/01/70 00:00 |
| more questions | | 01/01/70 00:00 |
| Summary of data and a suggestion | | 01/01/70 00:00 |
| A typo correction. | | 01/01/70 00:00 |
| well | | 01/01/70 00:00 |
| More info. on the project | | 01/01/70 00:00 |
| More info? | | 01/01/70 00:00 |
| thevenin terminations on LE signals | | 01/01/70 00:00 |
| Cable | | 01/01/70 00:00 |
| Termination must exactly match! | | 01/01/70 00:00 |
| Explanation | | 01/01/70 00:00 |
| Stranger and stranger | | 01/01/70 00:00 |
| Humor | | 01/01/70 00:00 |
| Russel | | 01/01/70 00:00 |
| tolerance goes both ways | | 01/01/70 00:00 |
| Bingo ! | | 01/01/70 00:00 |
| Bingo ! | | 01/01/70 00:00 |
| repeating myself | | 01/01/70 00:00 |
| bare CPLD | | 01/01/70 00:00 |
| Not professional? | | 01/01/70 00:00 |
| Forget about the second Bingo ! :) | | 01/01/70 00:00 |
| Payam | | 01/01/70 00:00 |
| The new decoder | | 01/01/70 00:00 |
| Cos i am just too good to you :) | | 01/01/70 00:00 |
| Wouldn't this be a bit expensive? | | 01/01/70 00:00 |
| Trifle expensive | | 01/01/70 00:00 |
| synchronous design | | 01/01/70 00:00 |
| synchronicity | | 01/01/70 00:00 |
| Not really | | 01/01/70 00:00 |
| ...but there are clocks | | 01/01/70 00:00 |
| a total mess | | 01/01/70 00:00 |
| Dear Eric | | 01/01/70 00:00 |
| Why didn't you just say.... | | 01/01/70 00:00 |
| Sub-micros and RS485 | | 01/01/70 00:00 |
| wrong approach | | 01/01/70 00:00 |
| here are the links (I forgot) | | 01/01/70 00:00 |
| Eric | | 01/01/70 00:00 |
| serial/parallel | | 01/01/70 00:00 |
| Cables, Multiplexing | | 01/01/70 00:00 |
| more on MPX | | 01/01/70 00:00 |
| sunlight | | 01/01/70 00:00 |
| more on sunlight | | 01/01/70 00:00 |
| Could you please explain more? | | 01/01/70 00:00 |
| Where is the current limiting from | | 01/01/70 00:00 |
| more explaining | | 01/01/70 00:00 |
| LEDs are in danger! | | 01/01/70 00:00 |
| 4538ing is nice | | 01/01/70 00:00 |
| What about this | | 01/01/70 00:00 |
| instead of 4538 | | 01/01/70 00:00 |
| all over the globe | | 01/01/70 00:00 |
| RE: to do what | | 01/01/70 00:00 |
| no need if non-mpx | | 01/01/70 00:00 |
| Question to Erik | | 01/01/70 00:00 |
| ST2221 | | 01/01/70 00:00 |
| EMI! | | 01/01/70 00:00 |
| not out, but in | | 01/01/70 00:00 |
| Transmitting parallel | | 01/01/70 00:00 |
| Series termination | | 01/01/70 00:00 |
| correct impedance of series termination | | 01/01/70 00:00 |
| termination | | 01/01/70 00:00 |
| Output current | | 01/01/70 00:00 |
| Kai, is that right? | | 01/01/70 00:00 |
| Series termination methode | | 01/01/70 00:00 |
| serial termination, got it | | 01/01/70 00:00 |
| series termination | | 01/01/70 00:00 |
| cable of 100Ohm | | 01/01/70 00:00 |
| Of course! | | 01/01/70 00:00 |
| used for parallel of thevenin terminatio | | 01/01/70 00:00 |
| Impedance of flat ribbon cable | | 01/01/70 00:00 |
| anyhow, termination may not be needed | | 01/01/70 00:00 |
| Is needed for 2m long cables! | | 01/01/70 00:00 |
| that long not needed | | 01/01/70 00:00 |
| Agreed | | 01/01/70 00:00 |
| re: termination may not be needed | | 01/01/70 00:00 |
| Thanx Kai | | 01/01/70 00:00 |
| Flat cable characteristic impedance | | 01/01/70 00:00 |
| Look closely... | | 01/01/70 00:00 |
| the the | | 01/01/70 00:00 |
| Doh! | | 01/01/70 00:00 |
| Initial Misconception | | 01/01/70 00:00 |
| I can't even spell that... | | 01/01/70 00:00 |
| ferrite | | 01/01/70 00:00 |
| ground is part of signal path | | 01/01/70 00:00 |
| Vcc IS part of the signal path | | 01/01/70 00:00 |
| Vcc PIN is part of signal path | | 01/01/70 00:00 |
| Depends on what you want to filter | | 01/01/70 00:00 |
| PC power supply | | 01/01/70 00:00 |
| 4700micro is too high | | 01/01/70 00:00 |
| paralell | | 01/01/70 00:00 |
| This cannot work! | | 01/01/70 00:00 |
| we have a problem | | 01/01/70 00:00 |
| Kai, Eric | | 01/01/70 00:00 |
| you need to think | | 01/01/70 00:00 |
| paralell resistor current limiter ! | | 01/01/70 00:00 |
| Thanks Farshid, Reinforcing PC power sup | | 01/01/70 00:00 |
| Reinforcing PC power | | 01/01/70 00:00 |
| Jan | | 01/01/70 00:00 |
| We don't understand each other | | 01/01/70 00:00 |
| What if only BIG I expansion | | 01/01/70 00:00 |
| Your Own Thread | | 01/01/70 00:00 |
| Metastability | | 01/01/70 00:00 |
| how about | | 01/01/70 00:00 |
| Maybe | | 01/01/70 00:00 |
| Divide the problem | | 01/01/70 00:00 |
| Own ideas | | 01/01/70 00:00 |
| sidesteps | | 01/01/70 00:00 |
| Thanks | | 01/01/70 00:00 |
| I dunno Kai.. | | 01/01/70 00:00 |
| I dunnoJez | | 01/01/70 00:00 |
| Agreed | | 01/01/70 00:00 |
| CE radiation | | 01/01/70 00:00 |
| Thanx for criticisims from Eric & Kai | | 01/01/70 00:00 |
| the original poster | | 01/01/70 00:00 |
| Eric, Kai | | 01/01/70 00:00 |
| if you can't explain | | 01/01/70 00:00 |
| paralell resistor current limiter ! | | 01/01/70 00:00 |
| Then, why don't you discuss it? | | 01/01/70 00:00 |
| taking our warnings seriously and discus | | 01/01/70 00:00 |
| world record | | 01/01/70 00:00 |
| world record +1 | | 01/01/70 00:00 |
| Eric | | 01/01/70 00:00 |
| Cost Is Final Issue | | 01/01/70 00:00 |
| lowest cost | | 01/01/70 00:00 |
| Yeah....... | | 01/01/70 00:00 |
| now drop the multiplex | | 01/01/70 00:00 |
| Let's compare parallel vs. serial | | 01/01/70 00:00 |
| Time to confess | | 01/01/70 00:00 |
| simple bitbang | | 01/01/70 00:00 |
| something ain't mising here? | | 01/01/70 00:00 |
| more | | 01/01/70 00:00 |
| not even that... | | 01/01/70 00:00 |
| you can, but | | 01/01/70 00:00 |
| Cool | | 01/01/70 00:00 |
| urband legends | | 01/01/70 00:00 |
| No influence | | 01/01/70 00:00 |
| This heart of mine on fire | | 01/01/70 00:00 |
| HC595's and ULN2803's | | 01/01/70 00:00 |
| typpo | | 01/01/70 00:00 |
| column xistors | | 01/01/70 00:00 |
| Instantaneous! | | 01/01/70 00:00 |
| saturation and off state not on and off | | 01/01/70 00:00 |
| What is a 'xistor'?? | | 01/01/70 00:00 |
| Okay, transistor | | 01/01/70 00:00 |
| xistor | | 01/01/70 00:00 |
| Saturation and Gain | | 01/01/70 00:00 |
| FETs and gate capacitance | | 01/01/70 00:00 |
| Fets Vs Transistors | | 01/01/70 00:00 |
| Which MOSFET | | 01/01/70 00:00 |
| More Qs on P-MOSFETs | | 01/01/70 00:00 |
| Best text ... | | 01/01/70 00:00 |
| Mosfets | | 01/01/70 00:00 |
| Low 'Ugs' and low 'Ron' is crucial! | | 01/01/70 00:00 |
| Bingo! | | 01/01/70 00:00 |
| Soft-start circuit | | 01/01/70 00:00 |
| answers and comments | | 01/01/70 00:00 |
| ghosting | | 01/01/70 00:00 |
| what | | 01/01/70 00:00 |
| ghosting | | 01/01/70 00:00 |
| ok | | 01/01/70 00:00 |
| this is probably not the case with Payam | | 01/01/70 00:00 |
| no, worse | | 01/01/70 00:00 |
| P-MOSFETs | | 01/01/70 00:00 |
| typicals | | 01/01/70 00:00 |
| These probably might go | | 01/01/70 00:00 |
| yes, you are and so what | | 01/01/70 00:00 |
| "them" explained | | 01/01/70 00:00 |
| another solution | | 01/01/70 00:00 |
| Serial is a must! | | 01/01/70 00:00 |
| Serial is not a must! | | 01/01/70 00:00 |
| Additional facts | | 01/01/70 00:00 |
| Multiprocessor? | | 01/01/70 00:00 |
| To ULN or not to ULN | | 01/01/70 00:00 |
| ULN2803, human eye response | | 01/01/70 00:00 |
| typical again | | 01/01/70 00:00 |
| consider everything | | 01/01/70 00:00 |
| Equivalent brightness with pulsing | | 01/01/70 00:00 |
| Re: Additional facts | | 01/01/70 00:00 |
| You put many of them... | | 01/01/70 00:00 |
| Re: You put many of them | | 01/01/70 00:00 |
| the matrix revisited | | 01/01/70 00:00 |
| here are some more additional facts | | 01/01/70 00:00 |
| NFI | | 01/01/70 00:00 |
| Me, not subtle ??? | | 01/01/70 00:00 |
| Subtle as a brick! | | 01/01/70 00:00 |
| one little detail | | 01/01/70 00:00 |
| 30° is it enough? | | 01/01/70 00:00 |
| Calculating ... please wait! | | 01/01/70 00:00 |
| answers/comments | | 01/01/70 00:00 |
| six-layer boards? | | 01/01/70 00:00 |
| no 2 layers possible | | 01/01/70 00:00 |
| 6 layer for 20$??? | | 01/01/70 00:00 |
| here | | 01/01/70 00:00 |
| PCB discussion extracted | | 01/01/70 00:00 |
| a trace about 1 inch | | 01/01/70 00:00 |
| 20A on a 2mm track! | | 01/01/70 00:00 |
| holy smoke | | 01/01/70 00:00 |
| Okay. | | 01/01/70 00:00 |
| again | | 01/01/70 00:00 |
| colloquialism | | 01/01/70 00:00 |
| Calculating a bit... | | 01/01/70 00:00 |
| 'Three' layer design | | 01/01/70 00:00 |
| layers - LED - EMI | | 01/01/70 00:00 |
| LEDs don't understand ground bounce | | 01/01/70 00:00 |
| But the four 74HC595 and ULN2804 do! | | 01/01/70 00:00 |
| 595s don't, ULN ... not important | | 01/01/70 00:00 |
not so | | 01/01/70 00:00 |
| Ground bounce | | 01/01/70 00:00 |
| Sure, shall take care of it. | | 01/01/70 00:00 |
| Don't underestimate heat dissipation! | | 01/01/70 00:00 |
| Kai | | 01/01/70 00:00 |
| Payam | | 01/01/70 00:00 |
| less complex/less expensive | | 01/01/70 00:00 |
| Did you try the multiplex? | | 01/01/70 00:00 |
| Yes | | 01/01/70 00:00 |
| go ahead and try | | 01/01/70 00:00 |
| Square root increase | | 01/01/70 00:00 |
| Distributed power supply | | 01/01/70 00:00 |
