Roger Hamlett wrote:> "martin griffith" <mart_in_medina@ya___.es> wrote in message > news:bqkc33l5074n40d4v3i37ngvcsghvlnpnl@4ax.com... > >>On Mon, 30 Apr 2007 13:31:17 -0700, in comp.arch.embedded John Larkin >><jjlarkin@highNOTlandTHIStechnologyPART.com> wrote: >> >> >>>On Mon, 30 Apr 2007 13:00:37 -0700, Joerg >>><notthisjoergsch@removethispacbell.net> wrote: >>> >>> >>>>John Larkin wrote: >> >>>>Talking about high-tech here: Does anyone know where to get wax rope >>>>for >>>>making cable harnesses? Couldn't find it on Digikey or Mouser. Or am I >>>>just too freaking old? >>> >>>They've recently invented these things called "tie-wraps." >>> >>>Which reminds me to find some plastic spiral cable protector stuff to >>>keep the cats from chewing up the cables on Mo's Mac. >>> >>>John >> >>Do they have a tie wrap made out of string yet? > > There are 'odd' occassions, where using waxed cord is nicer (things like > doing rewiring work on vintage equipment for example). ...But then you have to go all out and use cloth insulated wire. Our Towe's Ford museum used to do the occasional production run.> ... Remember there is > nothing 'special' about this cord. Waxed cotton thread is available from > many suppliers. It is just not held by electronic companies now, since in > normal use on electronics, it has been replaced by solutions like the > wraps and ties mentioned. A search for 'waxed tying string', should find > dozens of sources. Some aviation suppliers, also still offer this. >The only thing with those replacements is that tie wraps crumble over time while waxed thread usually doesn't. That alone can prevent a major "oh s..t" situation in an aircraft. -- Regards, Joerg http://www.analogconsultants.com
Real Time Clock Hardware
Started by ●April 30, 2007
Reply by ●April 30, 20072007-04-30
Reply by ●April 30, 20072007-04-30
Michael A. Terrell wrote:> Joerg wrote: > >>Jim Stewart wrote: >> >>>Most aircraft supply shops carry Koroseal >>>lacing cord. It's still used for behind- >>>the-panel avionics lacing. >>> >> >>Aha! Cool. Because we have a local runway almost next to the house so I >>could waltz over there and see if they've got any. >> >>I have seen <20 year old harnesses where half of the tie wraps have >>failed and their pieces were flying about in the bottom of the box. That >>would absolutely not be a good thing in an aircraft. In contrast I have >>never seen a harness where lacing has failed and some were north of 50 >>years old. > > > > I'll bet they were either the cheap plastic ones, or natural nylon. > The black ones are UV resistant, and last a lot longer. Outdoors, they > outlasted natural nylon over 5 to 1, and that was up north, in > Cincinnati, ohio. The additional UV in Florida kills the cheap ones > even faster. >Out here the clear ones last about one year in the sun, the black ones about three years. I used them on irrigation cables but now went to wire ties. Those never break. Where I found broken plastic cable ties was in lab equipment of the five-digit Dollar class. Replaced it with wax rope, never had issues anymore. But then the old spool of wax rope ran out :-( Still got a spool of very flexible cloth-insulated litz wire from my grandpa. -- Regards, Joerg http://www.analogconsultants.com
Reply by ●April 30, 20072007-04-30
On 30/04/2007 Joerg wrote: . . .> Yeah but it ain't the same. Wax rope looks a lot more neat and tidy. > To me tie-wraps have the curb appeal of a rubber band. Plus they > crumple. Ok, I have used them on my LAN runs as well but only because > I could neither turn nor see much in the crawl space.. . . If it's really waxed polyester twine you're looking for, then try a yacht chandlers. It's used for whipping the ends of ropes. -- John B
Reply by ●April 30, 20072007-04-30
Joerg wrote: <snip>> Talking about high-tech here: Does anyone know where to get wax rope for > making cable harnesses? Couldn't find it on Digikey or Mouser. Or am I > just too freaking old? >What ever happened to Gudbrod (sorry, can't type the diacritical marks)? Regards, Michael
Reply by ●April 30, 20072007-04-30
John B wrote:> On 30/04/2007 Joerg wrote: > > . > . > . > >>Yeah but it ain't the same. Wax rope looks a lot more neat and tidy. >>To me tie-wraps have the curb appeal of a rubber band. Plus they >>crumple. Ok, I have used them on my LAN runs as well but only because >>I could neither turn nor see much in the crawl space. > > . > . > . > > If it's really waxed polyester twine you're looking for, then try a > yacht chandlers. It's used for whipping the ends of ropes. >Marine supplies are far away from here, we are in the foothills. But Jim Stewart suggested Koroseal which is used in aircraft. And we've got a runway almost right next to the house ;-) -- Regards, Joerg http://www.analogconsultants.com
Reply by ●April 30, 20072007-04-30
Joerg wrote:> Talking about high-tech here: Does anyone know where to get wax rope for > making cable harnesses? Couldn't find it on Digikey or Mouser. Or am I > just too freaking old?I think a more common description is lacing cord. Digikey produces one hit, but it is for a not stocked 50 pound spool by Alpha Wire.
Reply by ●May 1, 20072007-05-01
"Tim Wescott" <tim@seemywebsite.com> wrote in message news:nqCdnWjCa-WRnavbnZ2dnUVZ_o-knZ2d@web-ster.com...>I need to put a real-time clock on a board. I haven't needed to know >anything about the market for this for years, and I see that I'm way >out of date. > > I just need basic clock functionality that I can read and set under > software control, I don't need any bells or whistles, and I don't care > much about the format. > > What I do care about is something that I can put on the board easily > and will work reliably. > > I could put a chip, caps, crystal and battery on the board. I see the > 24-DIP sized chips that come with the flip-top, though, and they look > like I could short-cut a number of production issues by using them. > > Does anyone have any experience with these things? Are the tops > interchangeable, or do I have to use a TI top with a TI bottom, ditto > for NXP, etc.? > > Any other positive or negative relevant experience anyone wants to > share?It probably is more than you need but I use a DS1315 in wide SO16 which keeps my RAM non-volatile as well. Works well and needs no dedicated control lines - it is controlled by sniffing for code sequences when writing to RAM. I've not experienced any of the Dallas availability concerns you expressed to Vladimir.
Reply by ●May 1, 20072007-05-01
"John Popelish" <jpopelish@rica.net> wrote in message news:mLqdnU66Po34D6vbnZ2dnUVZ_ovinZ2d@comcast.com...> Joerg wrote: > >> Talking about high-tech here: Does anyone know where to get wax rope for >> making cable harnesses? Couldn't find it on Digikey or Mouser. Or am I just >> too freaking old? > > I think a more common description is lacing cord. Digikey produces one hit, > but it is for a not stocked 50 pound spool by Alpha Wire. >Mouser and Newark list several types of lacing cord. Just search for "lacing" to get the hits -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Life is like a roll of toilet paper; the closer to the end, the faster it goes.
Reply by ●May 1, 20072007-05-01
On Mon, 30 Apr 2007 14:07:09 -0700, Joerg <notthisjoergsch@removethispacbell.net> wrote:>John Larkin wrote: > >> On Mon, 30 Apr 2007 13:00:37 -0700, Joerg >> <notthisjoergsch@removethispacbell.net> wrote: >> >> >>>John Larkin wrote: >>> >>> >>>>On Mon, 30 Apr 2007 07:44:17 -0700, Tim Wescott <tim@seemywebsite.com> >>>>wrote: >>>> >>>> >>>> >>>>>I need to put a real-time clock on a board. I haven't needed to know >>>>>anything about the market for this for years, and I see that I'm way out >>>>>of date. >>>>> >>>>>I just need basic clock functionality that I can read and set under >>>>>software control, I don't need any bells or whistles, and I don't care >>>>>much about the format. >>>>> >>>>>What I do care about is something that I can put on the board easily and >>>>>will work reliably. >>>>> >>>>>I could put a chip, caps, crystal and battery on the board. I see the >>>>>24-DIP sized chips that come with the flip-top, though, and they look >>>>>like I could short-cut a number of production issues by using them. >>>>> >>>>>Does anyone have any experience with these things? Are the tops >>>>>interchangeable, or do I have to use a TI top with a TI bottom, ditto >>>>>for NXP, etc.? >>>>> >>>>>Any other positive or negative relevant experience anyone wants to share? >>>>> >>>>>Thanks. >>>> >>>> >>>>Epsom has some dips with the crystal inside and all. Just add a >>>>lithium battery and you'll be good for 10 years, maybe 20. >>>> >>> >>>Isn't Epsom some kind of salt against swelling and soreness? SCNR... >>> >>>One detail that might be of importance is how the HW side of the SW >>>control for this RTC is going to be handled. SPI? I2C? Other? >>> >>>Talking about high-tech here: Does anyone know where to get wax rope for >>>making cable harnesses? Couldn't find it on Digikey or Mouser. Or am I >>>just too freaking old? >> >> >> They've recently invented these things called "tie-wraps." >> > >Yeah but it ain't the same. Wax rope looks a lot more neat and tidy. To >me tie-wraps have the curb appeal of a rubber band. Plus they crumple. >Ok, I have used them on my LAN runs as well but only because I could >neither turn nor see much in the crawl space. > > >> Which reminds me to find some plastic spiral cable protector stuff to >> keep the cats from chewing up the cables on Mo's Mac. >> > >A Mac? Gasp. I'll have to talk to one on the current project. Not really >looking forward to that.The only thing the Mac does is work and look beautiful. It's an awesome piece of design, and the OS is superb. I'd use a Mac if it had the apps I need. I just bought a dozen HP ProLiant "server" boxes so I guess we won't be converting to Macs any time soon. John
Reply by ●May 1, 20072007-05-01
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in message news:sehe33pqa3n0och6q6ksdpbmd17lj6qq3c@4ax.com...> The only thing the Mac does is work and look beautiful. It's an > awesome piece of design, and the OS is superb.It's just UNIX with a bit of sanity added. :-)> I just bought a dozen HP ProLiant "server" boxes so I guess we won't > be converting to Macs any time soon.Macs will happily access PC servers, and PCs will happily access Mac servers these days (the only downside being, OK, it's generally not as fast as Mac<-->Mac or PC<-->PC, but yourself you're routinely moving hundred megabyte files around, you probably won't notice or care). Apple actually uses an open-source implementation of the SAMBA file sharing protocol to pull this off... that must look pretty good on the author's resume, "Implemented SAMBA server code as open-source, free software... later adopted by Apple and shipped on millions of Macs..."
