| Kai Klaas 08/30/06 09:28 Read: 1212 times Germany |
#123389 - Ok, to be more precisely... Responding to: Jan Waclawek's previous message |
Jan said:
I went there and having typed 74VHC into search...
No 74VHC244. The list contains (after omitting VHCTs): 74VHC 00 D Quad 2-Inp NAND Gate 74VHC 02 D Quad 2-Inp NOR Gate 74VHC 08 D Quad 2-Inp AND Gate 74VHC 14 D Hex Inv Schmitt Trigger 74VHC 138 D 3 to 8 Line Decoder 74VHC 245 D Oct Bux Trans/N-Nv 74VHC 573 D Octal Latch 3-State 74VHC 574 D Octal D-FF Pet 3-St I wouldn't take any 244, because of the messy pinning. I would use a 74VHCT541, and this chip is available from http://www.reichelt.de Here are some another sources: http://www2.schukat.com/schukat/s...talog=true http://de.farnell.com/jsp/searc...tid=201100 The reason why I recommended the alternative schematic IS because the 74VHC244 isn't easily available. More, the circuit given by me is better suited to handle the "damaged" printer port signals. If I had to take a 74VHCMOS buffer, then I would take the 74VHCT541, which has suited pinning and TTL-compatible inputs. Jajn said:
but that's perhaps a bit more complicated than a newbie is willing to do... That's why I didn't want to publish my schematic, because no newbie will ever build this circuit... Kai |
| Topic | Author | Date |
| SPI ISP issues | Jan Waclawek | 08/13/06 03:00 |
| SPI ISP issues - part 2 | Jan Waclawek | 08/13/06 03:05 |
| SPI ISP issues - part 3 | Jan Waclawek | 08/13/06 04:20 |
| plural | Steve M. Taylor | 08/13/06 05:38 |
| Fora is certainly correct | Phillip M Gallo | 08/14/06 15:44 |
no, it's not ...  | Andy Peters | 08/15/06 01:02 |
| great post! | Phillip M Gallo | 08/15/06 15:02 |
| I think the biggest problem is with the AT | Richard Erlacher | 08/13/06 10:22 |
| maybe | Jan Waclawek | 08/13/06 13:28 |
| It's not necessarily the product ... it's the docs | Richard Erlacher | 08/13/06 16:26 |
| OK let them be so | Jan Waclawek | 08/14/06 07:36 |
| It's true, they shouldn't be used by anyone. | Richard Erlacher | 08/14/06 08:27 |
| What would you suggest to use? | Kai Klaas | 08/14/06 10:58 |
| Anything else at all would be fine ... even a PIC | Richard Erlacher | 08/14/06 15:58 |
| Whaaaat??? | Jan Waclawek | 08/14/06 16:05 |
| ANYTHING but Atmel products! | Richard Erlacher | 08/14/06 23:23 |
| Come on, Richard... | Kai Klaas | 08/15/06 08:39 |
| well, I, for one, agree with Richard | Erik Malund | 08/15/06 08:44 |
| Bullshit! Stating such is entirely ridiculous! | Kai Klaas | 08/15/06 10:43 |
| how can a FACT be \\\'ridiculous\\\"? | Erik Malund | 08/15/06 10:49 |
| It's ridiculous, because you deduce... | Kai Klaas | 08/15/06 11:07 |
| single event? | Erik Malund | 08/15/06 11:19 |
| Yes, and hundreds of events with Philips, | Kai Klaas | 08/15/06 11:42 |
| a VERY high up 'idiot' | Erik Malund | 08/16/06 07:01 |
| Well, mine was a long series of events | Richard Erlacher | 08/15/06 16:49 |
| there may be hope, sorry Kai | Erik Malund | 08/17/06 12:05 |
| It will be a WARM December day in Moscow | Richard Erlacher | 08/17/06 17:08 |
| maybe someone found out | Erik Malund | 08/18/06 06:28 |
| The penalty isn't severe enough | Richard Erlacher | 08/18/06 12:01 |
| blame the rest of the bunch | Erik Malund | 08/18/06 12:52 |
| Well, as I said, it's like U.S.-made cars | Richard Erlacher | 08/18/06 16:41 |
| If they'll do it to US, they'll do it to YOU! | Richard Erlacher | 08/15/06 10:44 |
| Do you really think that others are better?? | Kai Klaas | 08/15/06 11:03 |
| all comapanies have things to blame them for | Erik Malund | 08/15/06 11:18 |
| Indeed! | Kai Klaas | 08/15/06 11:36 |
| a maxim about maxim | Andy Peters | 08/15/06 12:17 |
| Once upon a time ... there were second sources ... | Richard Erlacher | 08/15/06 16:56 |
| I don't love Philips, either | Richard Erlacher | 08/15/06 16:51 |
| I don't 'love' any company, but I 'love' to work w | Erik Malund | 08/16/06 07:19 |
| Once upon a time there were FAE's who knew things. | Richard Erlacher | 08/16/06 09:43 |
| once upon a time ... | Erik Malund | 08/16/06 10:54 |
| Yes, it\'s like the grocery store | Richard Erlacher | 08/16/06 14:23 |
| The biggest problem is | Kai Klaas | 08/14/06 07:44 |
| do it - under my name | Jan Waclawek | 08/14/06 08:33 |
| All right, here is it... | Kai Klaas | 08/18/06 21:49 |
| Kai .. we're not getting a bit sensitive here ? | Phillip M Gallo | 08/19/06 00:41 |
| noooooo................ hmm, maybe a bit... | Kai Klaas | 08/19/06 23:07 |
| Why does this come up so frequently? | Richard Erlacher | 08/19/06 23:19 |
| Because there is so much trash in the www! | Kai Klaas | 08/21/06 10:21 |
| Maybe we can provide a local "fix" for that | Richard Erlacher | 08/21/06 10:38 |
| Great idea, but... | Kai Klaas | 08/21/06 22:04 |
| the other side of the coin | Erik Malund | 08/22/06 06:10 |
| A fool who trusts on phantasy programmers | Kai Klaas | 08/22/06 07:46 |
| Kai the issue is | Erik Malund | 08/22/06 08:02 |
| Exactly! | Kai Klaas | 08/22/06 09:14 |
| Little Joe | Jon Ledbetter | 08/22/06 09:26 |
| did you not know | Erik Malund | 08/22/06 09:44 |
| especially since he\'s been deceased for some time | Richard Erlacher | 08/22/06 09:58 |
| Lots of those "fantasy" programmers are for sale | Richard Erlacher | 08/22/06 09:57 |
| What a trash! | Kai Klaas | 08/22/06 22:23 |
| Oddly enough, similar circuits work for JTAG | Richard Erlacher | 08/22/06 22:31 |
| Driving cables is nasty!! | Kai Klaas | 08/22/06 22:53 |
| framkly, I wish eval-board makers would heed this | Richard Erlacher | 08/22/06 23:16 |
| Have you tested series termination? | Kai Klaas | 08/23/06 10:16 |
| would be great, but | Erik Malund | 08/23/06 10:36 |
| Kai, I think that would be a WONDERFUL addition! | Richard Erlacher | 08/23/06 12:52 |
| Well, what I am thinking ... | Richard Erlacher | 08/22/06 10:11 |
| Yeah, but what's that to do with ISP? | Jon Ledbetter | 08/22/06 10:20 |
| grits, yes, oatmeal, no | Erik Malund | 08/22/06 10:21 |
| Some of 'em will look, read, and do SOME work | Richard Erlacher | 08/22/06 17:57 |
| and the winner is | Erik Malund | 08/23/06 05:56 |
| An alternative to Atmels ISP CABLE | Kai Klaas | 08/20/06 22:46 |
| Profiting from highest noise margins | Kai Klaas | 08/21/06 10:15 |
| comparator | Jan Waclawek | 08/25/06 17:07 |
| Not so well suited... | Kai Klaas | 08/26/06 08:28 |
| I don't understand. | Jan Waclawek | 08/26/06 15:39 |
| Check the spec-sheets | Richard Erlacher | 08/26/06 17:35 |
| I am sorry... | Kai Klaas | 08/26/06 21:10 |
| cables et al | Jan Waclawek | 08/27/06 00:57 |
| Cables... | Kai Klaas | 08/27/06 09:03 |
| software | Jan Waclawek | 08/27/06 15:09 |
| ps | Jan Waclawek | 08/27/06 16:17 |
| To be honest... | Kai Klaas | 08/27/06 20:12 |
| Atmel software... a piece of @%^& | Jan Waclawek | 08/28/06 04:02 |
| it's for amateurs | Erik Malund | 08/28/06 06:58 |
| ?? | Kai Klaas | 08/28/06 07:20 |
| Not at all | Kai Klaas | 08/28/06 07:19 |
| dear amateurs, be realistic | Erik Malund | 08/28/06 08:02 |
| Erik, did you mean... | Jan Waclawek | 08/28/06 09:24 |
| Why, oh, why | Erik Malund | 08/28/06 09:39 |
| why, oh why | Jan Waclawek | 08/28/06 09:45 |
| not the issue | Erik Malund | 08/28/06 10:32 |
| but you ARE professional!!!! | Jan Waclawek | 08/28/06 09:39 |
| now, I'm going to upset Richard | Erik Malund | 08/28/06 09:44 |
| ICE? | Jan Waclawek | 08/28/06 09:51 |
| No success stories | Maarten Brock | 08/28/06 12:28 |
| Exactly! | Kai Klaas | 08/28/06 20:48 |
| Grrrr! Well, maybe not this time ... | Richard Erlacher | 08/28/06 12:35 |
| it makes you wonder, doesn't it? | Richard Erlacher | 08/28/06 12:28 |
| ATMEL cable with the HC | Jan Waclawek | 08/28/06 09:49 |
| another idea | Jan Waclawek | 08/29/06 06:58 |
| please, pretty please | Erik Malund | 08/29/06 07:22 |
| there is no magic | Jan Waclawek | 08/29/06 07:32 |
| you said it | Erik Malund | 08/29/06 07:47 |
| you got me wrong | Jan Waclawek | 08/29/06 07:53 |
| do not blame me for what YOU said :) | Erik Malund | 08/29/06 08:04 |
| teaching is hard | Jan Waclawek | 08/29/06 08:32 |
| good analogy, the question is | Erik Malund | 08/29/06 08:47 |
| when I turned my back... | Jan Waclawek | 08/29/06 09:07 |
| you forgot | Erik Malund | 08/29/06 09:14 |
| filter | Jan Waclawek | 08/29/06 09:19 |
| nope | Erik Malund | 08/29/06 09:25 |
| upside-down | Jan Waclawek | 08/29/06 07:49 |
| and the 3rd reader | Erik Malund | 08/29/06 07:57 |
| he already did | Jan Waclawek | 08/29/06 08:14 |
| a good one | Erik Malund | 08/29/06 08:51 |
| tell it beforehand | Jan Waclawek | 08/29/06 09:11 |
| The newbie SHALL try to build his stuff, but... | Kai Klaas | 08/29/06 09:24 |
| allow a reply of \"you stupid idiot\" to anyone | Erik Malund | 08/29/06 09:33 |
| Will not do the trick, unfortunately | Kai Klaas | 08/29/06 09:14 |
| decoupling the LPT lines? | Jan Waclawek | 08/29/06 09:41 |
| Low state noise margin... | Kai Klaas | 08/29/06 09:43 |
| and with a Schottky? | Jan Waclawek | 08/29/06 09:53 |
| No, I wouldn't recommend this | Kai Klaas | 08/29/06 21:04 |
| www.reichelt.de | Jan Waclawek | 08/30/06 02:02 |
| Ok, to be more precisely... | Kai Klaas | 08/30/06 09:28 |
| can you please draw it down? | Jan Waclawek | 08/30/06 11:46 |
| Replace the 74VHC244 in the original circuit | Kai Klaas | 08/30/06 12:03 |
| How would a germanium work? | Richard Erlacher | 08/29/06 22:10 |
| Could work! | Kai Klaas | 08/29/06 22:34 |
| thanks, Kai! | Jan Waclawek | 08/25/06 16:58 |
| Schottky diodes | Kai Klaas | 08/26/06 21:29 |
| to Schottky or not to Schottky :-) | Jan Waclawek | 08/27/06 00:46 |
| Yes, but we must assume a minimum standard... | Kai Klaas | 08/27/06 08:32 |
| shopping | Jan Waclawek | 08/27/06 14:57 |
| My point is.. | Kai Klaas | 08/27/06 20:06 |
| You can use an array | Richard Erlacher | 08/27/06 12:25 |
| Your search - 74S1023 - did not match any document | Jan Waclawek | 08/27/06 15:03 |
| SN74S1053 | Kai Klaas | 08/27/06 19:54 |
| OOPS! it is 74S1053 ... sorry! | Richard Erlacher | 08/27/06 22:29 |
| the issues | Erik Malund | 08/15/06 07:50 |
| a most telling thread | Erik Malund | 08/15/06 09:11 |
| The root problem is that the first thing one needs | Richard Erlacher | 08/15/06 17:02 |
| "dedicated programmer" | Jan Waclawek | 08/31/06 02:50 |
| what's difficult to understand ... | Richard Erlacher | 08/31/06 08:03 |
| Ok, how do you propose they program and erase the | Erik Malund | 08/31/06 08:27 |
| I would not be quite so sure about that | Jan Waclawek | 08/31/06 08:43 |
| Keep in mind that this is for newbies ... | Richard Erlacher | 08/31/06 12:29 |
| but they still have to build it | Erik Malund | 08/31/06 13:45 |
| Only because it looks simple does not mean... | Kai Klaas | 08/31/06 14:33 |
| he's desperate | Erik Malund | 08/31/06 15:19 |
| there are lots of circuits published like this! | Richard Erlacher | 08/31/06 16:41 |
| I used to have memory mapped I/O in virtual | Erik Malund | 09/01/06 06:23 |
| I wouldn't say that ... | Richard Erlacher | 09/01/06 09:00 |
| that threy learn to drive with a stick shift | Erik Malund | 09/01/06 09:40 |
| Once again, you are exaggerating ... | Richard Erlacher | 09/01/06 09:59 |
| the point I\'m trying to make (and believe that I | Erik Malund | 09/01/06 10:46 |
| Yes, but in 101 you've got to use a '51 or '31 | Richard Erlacher | 09/01/06 13:47 |
| nonono | Jan Waclawek | 09/01/06 14:16 |
| Perhaps you\'re right, in this case ... | Richard Erlacher | 09/01/06 14:40 |
| I don't think so | Jan Waclawek | 09/01/06 15:21 |
| Ah but.. | Steve M. Taylor | 09/03/06 21:00 |
| halelujah! | Erik Malund | 09/05/06 09:51 |
| the problem with RD2 is... | Jan Waclawek | 09/01/06 14:17 |
| what cost the most | Erik Malund | 09/05/06 09:58 |
| cost | Jan Waclawek | 09/06/06 08:40 |
| patience is what it takes | Richard Erlacher | 09/06/06 15:57 |
| let's sort it out | Jan Waclawek | 09/06/06 08:52 |
| Richard, you aregue things that, while valuable , | Erik Malund | 09/05/06 09:56 |
| Its not the cables if you ask me. | Jez Smith | 09/06/06 15:25 |
| an interesting thought | Erik Malund | 09/06/06 15:39 |
| It's probably not JUST this part ... | Richard Erlacher | 09/06/06 16:01 |
| not the cable alone | Jan Waclawek | 09/07/06 01:00 |
| it will, but | Erik Malund | 09/07/06 06:34 |
| It simply has to do with the numbers | Kai Klaas | 09/07/06 09:02 |
| maybe not quite ... | Richard Erlacher | 09/07/06 09:33 |
| I was assuming... | Kai Klaas | 09/07/06 09:58 |
| a case like that ... | Richard Erlacher | 09/07/06 11:32 |
| I have | Erik Malund | 09/07/06 11:43 |
| Perhaps it's that the approach is wrong | Richard Erlacher | 09/07/06 15:29 |
| I guess I have seen those ... | Richard Erlacher | 09/18/06 10:37 |
| fresh thoughts | Jan Waclawek | 09/18/06 07:52 |
| ??????????????? | Kai Klaas | 09/18/06 11:03 |
| I'm puzzled, too, Jan | Richard Erlacher | 09/19/06 08:57 |
| 2 different things | Jan Waclawek | 09/19/06 11:49 |
| au contraire | Erik Malund | 09/19/06 11:53 |
| from the ISP point of view... | Jan Waclawek | 09/19/06 12:13 |
| if you have "no reset and oscillator" | Erik Malund | 09/19/06 12:29 |
| sure | Jan Waclawek | 09/19/06 12:36 |
| Ok \"in-situ programming\" works but that is not ISP | Erik Malund | 09/19/06 12:51 |
| Does this scheme actually work reliably? | Richard Erlacher | 09/19/06 13:32 |
| Guiness book? | Erik Malund | 09/19/06 13:46 |
| This all goes back to the "AT" in the part number | Richard Erlacher | 09/19/06 14:59 |
| Nothing magic with reset and oscillator | Kai Klaas | 09/19/06 20:27 |
| I am talking about the rusty nail | Jan Waclawek | 09/20/06 01:19 |
| Yes, here you are right! | Kai Klaas | 09/20/06 08:10 |
| just helping | Erik Malund | 09/20/06 08:42 |
| 200 | Steve M. Taylor | 09/20/06 09:59 |
| not quite, but I like the idea | Jan Waclawek | 09/20/06 11:50 |
| Exactly! | Kai Klaas | 09/20/06 12:34 |
| ... and that's why I advocate for the 8032 version | Richard Erlacher | 09/20/06 22:13 |
| Stuff it | Steve M. Taylor | 09/20/06 23:40 |
| This will soon be moot | Erik Malund | 09/21/06 07:05 |
| Central Europe? | Jan Waclawek | 09/21/06 07:28 |
| Mistake... | Kai Klaas | 09/21/06 08:06 |
| you think so, I do not | Erik Malund | 09/21/06 08:13 |
| Better hope... | Kai Klaas | 09/21/06 08:31 |
| no love there | Erik Malund | 09/21/06 08:44 |
| Nothing is perfect... | Jan Waclawek | 09/22/06 01:24 |
| HUH | Erik Malund | 09/22/06 06:27 |
| waitaminute | Jan Waclawek | 09/22/06 06:43 |
| same desert | Erik Malund | 09/22/06 06:56 |
| it appears so | Jan Waclawek | 09/22/06 07:00 |
| male cow manure | Erik Malund | 09/21/06 06:57 |
| Eprom programmers are cheap and simple | Richard Erlacher | 09/21/06 10:46 |
| Cheaper than a $25 Atmel cable ? | Erik Malund | 09/21/06 11:17 |
| Yes, and widely applicable, too | Richard Erlacher | 09/22/06 10:05 |
| beware | Erik Malund | 09/22/06 11:12 |
| That's the usual line from an Asian vendor in U.S. | Richard Erlacher | 09/22/06 14:09 |
| fresh experience | Jan Waclawek | 09/26/06 02:26 |
| I am not going to vote 'off topic' but | Erik Malund | 09/26/06 06:26 |
| I am still just thinking aloud... | Jan Waclawek | 09/26/06 07:27 |
| just helping | Jez Smith | 09/26/06 07:50 |
| 222 posts WOW!! | Jez Smith | 09/26/06 07:51 |
| EEEK! Why would you get that close? | Richard Erlacher | 09/26/06 10:44 |
| post number 224 and counting | Jez Smith | 09/27/06 09:49 |
| Well, I\'m a dog person ... | Richard Erlacher | 09/27/06 11:37 |
| 226 | Erik Malund | 09/27/06 11:41 |
| tie a brick around his neck | Richard Erlacher | 09/27/06 11:54 |
| %$#@! it happened again! | Richard Erlacher | 09/27/06 11:55 |
| Programming Dogs | Jon Ledbetter | 09/27/06 12:52 |
230 tried it | Erik Malund | 09/27/06 13:00 |