On 11/03/18 18:08, John Larkin wrote:> On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> > wrote: > >> Sorry for the occasional non-political post ... >> >> In the past I have seen special character issues with netlists across >> foreign country boundaries. For example, in some countries they use a >> comma as the decimal "point" and NXP also has those dreaded "...,215" in >> some part numbers. That can blow a netlist out of the water. >> >> How about a real decimal point (a dot) inside a footprint? >> >> Main reason I ask is for mounting hole designators. A client wants all >> this in metric dimensions and that will require fractions of a >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or >> such and that's less understandable. > > We delete extra characters in our parts database. TO247, not TO-247. > But decimal points are necesssary. We haven't seen any problems with > that, but we rarely send BOMs outside the company. > > You could adapt the dreaded 4K7 convention: 4MM5drill. > >Oh, that would be a 4m5 drill. A 4M5 drill would be something to behold! Jeroen Belleman
Dot allowed as characters allowed in netlist?
Started by ●March 11, 2018
Reply by ●March 11, 20182018-03-11
Reply by ●March 11, 20182018-03-11
Den søndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman:> On 11/03/18 18:08, John Larkin wrote: > > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> > > wrote: > > > >> Sorry for the occasional non-political post ... > >> > >> In the past I have seen special character issues with netlists across > >> foreign country boundaries. For example, in some countries they use a > >> comma as the decimal "point" and NXP also has those dreaded "...,215" in > >> some part numbers. That can blow a netlist out of the water. > >> > >> How about a real decimal point (a dot) inside a footprint? > >> > >> Main reason I ask is for mounting hole designators. A client wants all > >> this in metric dimensions and that will require fractions of a > >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint > >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or > >> such and that's less understandable. > > > > We delete extra characters in our parts database. TO247, not TO-247. > > But decimal points are necesssary. We haven't seen any problems with > > that, but we rarely send BOMs outside the company. > > > > You could adapt the dreaded 4K7 convention: 4MM5drill. > > > > > > Oh, that would be a 4m5 drill. A 4M5 drill would be something to > behold! >m is the SI unit for meter soo, https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg
Reply by ●March 11, 20182018-03-11
On Sun, 11 Mar 2018 15:47:45 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:>Den s�ndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman: >> On 11/03/18 18:08, John Larkin wrote: >> > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> >> > wrote: >> > >> >> Sorry for the occasional non-political post ... >> >> >> >> In the past I have seen special character issues with netlists across >> >> foreign country boundaries. For example, in some countries they use a >> >> comma as the decimal "point" and NXP also has those dreaded "...,215" in >> >> some part numbers. That can blow a netlist out of the water. >> >> >> >> How about a real decimal point (a dot) inside a footprint? >> >> >> >> Main reason I ask is for mounting hole designators. A client wants all >> >> this in metric dimensions and that will require fractions of a >> >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint >> >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or >> >> such and that's less understandable. >> > >> > We delete extra characters in our parts database. TO247, not TO-247. >> > But decimal points are necesssary. We haven't seen any problems with >> > that, but we rarely send BOMs outside the company. >> > >> > You could adapt the dreaded 4K7 convention: 4MM5drill. >> > >> > >> >> Oh, that would be a 4m5 drill. A 4M5 drill would be something to >> behold! >> > >m is the SI unit for meter soo, > >https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg > >Since we have SI units, and accepted scientific notation, why do some people use the insane and ambiguous 6v8 style? That seems to be mostly amateurs and audio people. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●March 11, 20182018-03-11
Den mandag den 12. marts 2018 kl. 00.24.44 UTC+1 skrev John Larkin:> On Sun, 11 Mar 2018 15:47:45 -0700 (PDT), Lasse Langwadt Christensen > <langwadt@fonz.dk> wrote: > > >Den søndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman: > >> On 11/03/18 18:08, John Larkin wrote: > >> > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> > >> > wrote: > >> > > >> >> Sorry for the occasional non-political post ... > >> >> > >> >> In the past I have seen special character issues with netlists across > >> >> foreign country boundaries. For example, in some countries they use a > >> >> comma as the decimal "point" and NXP also has those dreaded "...,215" in > >> >> some part numbers. That can blow a netlist out of the water. > >> >> > >> >> How about a real decimal point (a dot) inside a footprint? > >> >> > >> >> Main reason I ask is for mounting hole designators. A client wants all > >> >> this in metric dimensions and that will require fractions of a > >> >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint > >> >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or > >> >> such and that's less understandable. > >> > > >> > We delete extra characters in our parts database. TO247, not TO-247. > >> > But decimal points are necesssary. We haven't seen any problems with > >> > that, but we rarely send BOMs outside the company. > >> > > >> > You could adapt the dreaded 4K7 convention: 4MM5drill. > >> > > >> > > >> > >> Oh, that would be a 4m5 drill. A 4M5 drill would be something to > >> behold! > >> > > > >m is the SI unit for meter soo, > > > >https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg > > > > > > Since we have SI units, and accepted scientific notation, why do some > people use the insane and ambiguous 6v8 style? That seems to be mostly > amateurs and audio people. >how is 6V8 ambiguous ?
Reply by ●March 11, 20182018-03-11
On Sun, 11 Mar 2018 15:47:45 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:>Den s�ndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman: >> On 11/03/18 18:08, John Larkin wrote: >> > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> >> > wrote: >> > >> >> Sorry for the occasional non-political post ... >> >> >> >> In the past I have seen special character issues with netlists across >> >> foreign country boundaries. For example, in some countries they use a >> >> comma as the decimal "point" and NXP also has those dreaded "...,215" in >> >> some part numbers. That can blow a netlist out of the water. >> >> >> >> How about a real decimal point (a dot) inside a footprint? >> >> >> >> Main reason I ask is for mounting hole designators. A client wants all >> >> this in metric dimensions and that will require fractions of a >> >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint >> >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or >> >> such and that's less understandable. >> > >> > We delete extra characters in our parts database. TO247, not TO-247. >> > But decimal points are necesssary. We haven't seen any problems with >> > that, but we rarely send BOMs outside the company. >> > >> > You could adapt the dreaded 4K7 convention: 4MM5drill. >> > >> > >> >> Oh, that would be a 4m5 drill. A 4M5 drill would be something to >> behold! >> > >m is the SI unit for meter soo, > >https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg >So I guess 4K7 is out, too.
Reply by ●March 11, 20182018-03-11
John Larkin <jjlarkin@highlandtechnology.com> wrote:> Some things don't work right if file names have embedded spaces. And > embedded spaces get messy if you want to paste a file name into a > document.> New Text Document.txt > New Text Document.txt > New Text Document .txt> sure look close in a proportional font.Some people use underscore instead of spaces: New_Text_Document__.txt>>We can write appealing, pronouncable file names now. Like "Power Supply >>Rev 1".> Sure, as long as you only ever design one power supply.The problem with descriptive filenames is you can never be certain if there is a different file somewhere with the same name. The problem occurs when you try to copy to file to another folder that contains a file with the same name. My solution to the problem is to rename the file to the hex date and time the file was created. This gives an 8-digit filename that can never be duplicated anywhere on the disk since "now" only happens once. So what happens to the description? I generate an index for every file in the folder. It contains the hex filename, the date it was last modified, the size, several indicators such as the most recently viewed, and the description. When I need to copy the file somewhere, I wrote a file management software that copies the file and the index entry to the new folder, so the file and its index remain tied together. There are many advantages to this system. I can create a global list of every file on my hard disk, and search it with a modified Boyer-Moore scan to find a desired file. It's pretty fast. For example, here are the results for a search for "Larkin": Searched 523,940 files in 5,861 directories Found 125 hits in 539.000 ms A search for "Hobbs" gives Searched 523,940 files in 5,861 directories Found 74 hits in 68.217 ms Note the second search is almost ten times faster. This is because the global index is already in Window's cache so it doesn't have to be read from the disk. Statistically, the number of hits in the above searches doesn't mean much. Many of the files are LTspice files that double the number of hits since they have an ASC and a PLT file with the same hex identifier.
Reply by ●March 11, 20182018-03-11
On Sun, 11 Mar 2018 16:31:40 -0700 (PDT), Lasse Langwadt Christensen <langwadt@fonz.dk> wrote:>Den mandag den 12. marts 2018 kl. 00.24.44 UTC+1 skrev John Larkin: >> On Sun, 11 Mar 2018 15:47:45 -0700 (PDT), Lasse Langwadt Christensen >> <langwadt@fonz.dk> wrote: >> >> >Den s�ndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman: >> >> On 11/03/18 18:08, John Larkin wrote: >> >> > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> >> >> > wrote: >> >> > >> >> >> Sorry for the occasional non-political post ... >> >> >> >> >> >> In the past I have seen special character issues with netlists across >> >> >> foreign country boundaries. For example, in some countries they use a >> >> >> comma as the decimal "point" and NXP also has those dreaded "...,215" in >> >> >> some part numbers. That can blow a netlist out of the water. >> >> >> >> >> >> How about a real decimal point (a dot) inside a footprint? >> >> >> >> >> >> Main reason I ask is for mounting hole designators. A client wants all >> >> >> this in metric dimensions and that will require fractions of a >> >> >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint >> >> >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or >> >> >> such and that's less understandable. >> >> > >> >> > We delete extra characters in our parts database. TO247, not TO-247. >> >> > But decimal points are necesssary. We haven't seen any problems with >> >> > that, but we rarely send BOMs outside the company. >> >> > >> >> > You could adapt the dreaded 4K7 convention: 4MM5drill. >> >> > >> >> > >> >> >> >> Oh, that would be a 4m5 drill. A 4M5 drill would be something to >> >> behold! >> >> >> > >> >m is the SI unit for meter soo, >> > >> >https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg >> > >> > >> >> Since we have SI units, and accepted scientific notation, why do some >> people use the insane and ambiguous 6v8 style? That seems to be mostly >> amateurs and audio people. >> > >how is 6V8 ambiguous ? > > >That's just ugly. But how would you do 6850 volts? 6v85K 6kv85 6k85v ? Does r mean ohms, or decimal point? 0r5 could be next to a resistor, or an inductor. How do you do frequency? 155Hz52 ? SI format clearly distinguishes between exponents and dimensional units. The 4k7 thing is just ugly and sloppy. Modern decimal points don't fall off drawings. Properly drawn decimal points never did. Substituting r for . is dumbr -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●March 11, 20182018-03-11
On Sun, 11 Mar 2018 19:35:39 -0400, krw@notreal.com wrote:>On Sun, 11 Mar 2018 15:47:45 -0700 (PDT), Lasse Langwadt Christensen ><langwadt@fonz.dk> wrote: > >>Den s�ndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman: >>> On 11/03/18 18:08, John Larkin wrote: >>> > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> >>> > wrote: >>> > >>> >> Sorry for the occasional non-political post ... >>> >> >>> >> In the past I have seen special character issues with netlists across >>> >> foreign country boundaries. For example, in some countries they use a >>> >> comma as the decimal "point" and NXP also has those dreaded "...,215" in >>> >> some part numbers. That can blow a netlist out of the water. >>> >> >>> >> How about a real decimal point (a dot) inside a footprint? >>> >> >>> >> Main reason I ask is for mounting hole designators. A client wants all >>> >> this in metric dimensions and that will require fractions of a >>> >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint >>> >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or >>> >> such and that's less understandable. >>> > >>> > We delete extra characters in our parts database. TO247, not TO-247. >>> > But decimal points are necesssary. We haven't seen any problems with >>> > that, but we rarely send BOMs outside the company. >>> > >>> > You could adapt the dreaded 4K7 convention: 4MM5drill. >>> > >>> > >>> >>> Oh, that would be a 4m5 drill. A 4M5 drill would be something to >>> behold! >>> >> >>m is the SI unit for meter soo, >> >>https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg >> >So I guess 4K7 is out, too.Especially in equations. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●March 11, 20182018-03-11
On Sun, 11 Mar 2018 17:07:35 -0700, John Larkin <jjlarkin@highlandtechnology.com> wrote:>On Sun, 11 Mar 2018 19:35:39 -0400, krw@notreal.com wrote: > >>On Sun, 11 Mar 2018 15:47:45 -0700 (PDT), Lasse Langwadt Christensen >><langwadt@fonz.dk> wrote: >> >>>Den s�ndag den 11. marts 2018 kl. 23.27.16 UTC+1 skrev Jeroen Belleman: >>>> On 11/03/18 18:08, John Larkin wrote: >>>> > On Sun, 11 Mar 2018 09:37:59 -0700, Joerg <news@analogconsultants.com> >>>> > wrote: >>>> > >>>> >> Sorry for the occasional non-political post ... >>>> >> >>>> >> In the past I have seen special character issues with netlists across >>>> >> foreign country boundaries. For example, in some countries they use a >>>> >> comma as the decimal "point" and NXP also has those dreaded "...,215" in >>>> >> some part numbers. That can blow a netlist out of the water. >>>> >> >>>> >> How about a real decimal point (a dot) inside a footprint? >>>> >> >>>> >> Main reason I ask is for mounting hole designators. A client wants all >>>> >> this in metric dimensions and that will require fractions of a >>>> >> millimeter. For clarity I'd like to list that as "4.5MM_DRILL" footprint >>>> >> or similar. If dots are not allowed I could only use 4500UM_DRILL" or >>>> >> such and that's less understandable. >>>> > >>>> > We delete extra characters in our parts database. TO247, not TO-247. >>>> > But decimal points are necesssary. We haven't seen any problems with >>>> > that, but we rarely send BOMs outside the company. >>>> > >>>> > You could adapt the dreaded 4K7 convention: 4MM5drill. >>>> > >>>> > >>>> >>>> Oh, that would be a 4m5 drill. A 4M5 drill would be something to >>>> behold! >>>> >>> >>>m is the SI unit for meter soo, >>> >>>https://3.imimg.com/data3/GP/EO/MY-4706592/tunnel-boring-machine-500x500.jpg >>> >>So I guess 4K7 is out, too. > >Especially in equations.I have no problems with that. I use the nomenclature in schematics because schematic capture software is so incredibly backwards. All of it.
Reply by ●March 11, 20182018-03-11
John Larkin <jjlarkin@highlandtechnology.com> wrote:> SI format clearly distinguishes between exponents and dimensional > units. The 4k7 thing is just ugly and sloppy.> Modern decimal points don't fall off drawings. Properly drawn decimal > points never did.There is a readability problem with decimal values. For example, .47uF on a large drawing can be misinterpreted to mean 47uF. One solution is to add a zero in front of the decimal so it reads 0.47uF I know you already know that. Just mentioning it for others.
