Interesting TIA design
in [Design]
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From: John Larkin on 28 Oct 2009 17:49 On Wed, 28 Oct 2009 13:04:58 -0700, Joerg <invalid(a)invalid.invalid> wrote: >John Larkin wrote: >> On Wed, 28 Oct 2009 12:52:24 -0400, Phil Hobbs >> <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >> >>> John Devereux wrote: >>>> Phil Hobbs <pcdhSpamMeSenseless(a)electrooptical.net> writes: >>>> >>>>> Jan Panteltje wrote: >>>>>> On a sunny day (Tue, 27 Oct 2009 17:45:49 -0700 (PDT)) it happened Tim >>>>>> Williams <tmoranwms(a)gmail.com> wrote in >>>>>> <3e89ba34-8f94-452a-bc7c-5eb86e00f912(a)k26g2000vbp.googlegroups.com>: >>>> [...] >>>> >>>>>>> When I wanted to do a complete layout of this circuit, I did it on a >>>>>>> full sheet of newsprint. Old crummy stuff, it ain't vellum, but it >>>>>>> was on hand. Then I put it on the computer (in A4 size sections). >>>>>>> >>>>>>> http://myweb.msoe.edu/williamstm/Images/EV_Paper_Draft.jpg >>>>>>> >>>>>>> Tim >>>>>> Yep, >>>>>> ftp://panteltje.com/pub/fdc-1.jpg >>>>>> ftp://panteltje.com/pub/fdc-2.jpg >>>>>> Note the date (top right). >>>>>> >>>>> Wow, an ancient manuscript. Didn't they have ruled vellum in those >>>>> days? Of course then you wouldn't be able to trace the prehistory of >>>>> the MS by looking at the incomplete erasing. ;) >>>>> Cheers >>>>> >>>>> Phil Hobbs >>>>> (Proud owner of a lifetime supply of Clearprint) >>>> So where in this benighted continent - i.e. Europe - can I obtain this >>>> miraculous parchment? Anyone know? A3 or A4 would be nice! >>>> >>>> John Larkin guarantees it will increase my IQ by 10 points and allow me >>>> to become a Real Engineer at last. >>>> >>>> (I tried printing out a faint squared pattern on my laserjet and it's not >>>> bad. But I feel I am missing out on the true experience). >>>> >>> Dunno. But first class vellum is beautiful--you can erase something 10 >>> times and it looks like you got it right the first time. (Which might >>> have something to do with the apparent IQ increase.) ;) If you aren't >>> allergic to inches, the good stuff is 1000H 1010 with the blue fadeout grid. >>> >>> Their international dealer list is at >>> http://www.clearprintpapercompany.com/media/dealers/international_dealers.html >>> There's one in Germany and one in Italy. >>> >>> Cheers >>> >>> Phil Hobbs >> >> This >> >> ftp://jjlarkin.lmi.net/FilterBoard.jpg >> >> becomes this: >> >> ftp://jjlarkin.lmi.net/Filter1.jpg >> > >Easy on the solder paste there, guys ... :-) > >[...] Engineering unit, hand soldered. John
From: Joerg on 28 Oct 2009 17:53 John Larkin wrote: > On Wed, 28 Oct 2009 13:04:58 -0700, Joerg <invalid(a)invalid.invalid> > wrote: > >> John Larkin wrote: >>> On Wed, 28 Oct 2009 12:52:24 -0400, Phil Hobbs >>> <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >>> >>>> John Devereux wrote: >>>>> Phil Hobbs <pcdhSpamMeSenseless(a)electrooptical.net> writes: >>>>> >>>>>> Jan Panteltje wrote: >>>>>>> On a sunny day (Tue, 27 Oct 2009 17:45:49 -0700 (PDT)) it happened Tim >>>>>>> Williams <tmoranwms(a)gmail.com> wrote in >>>>>>> <3e89ba34-8f94-452a-bc7c-5eb86e00f912(a)k26g2000vbp.googlegroups.com>: >>>>> [...] >>>>> >>>>>>>> When I wanted to do a complete layout of this circuit, I did it on a >>>>>>>> full sheet of newsprint. Old crummy stuff, it ain't vellum, but it >>>>>>>> was on hand. Then I put it on the computer (in A4 size sections). >>>>>>>> >>>>>>>> http://myweb.msoe.edu/williamstm/Images/EV_Paper_Draft.jpg >>>>>>>> >>>>>>>> Tim >>>>>>> Yep, >>>>>>> ftp://panteltje.com/pub/fdc-1.jpg >>>>>>> ftp://panteltje.com/pub/fdc-2.jpg >>>>>>> Note the date (top right). >>>>>>> >>>>>> Wow, an ancient manuscript. Didn't they have ruled vellum in those >>>>>> days? Of course then you wouldn't be able to trace the prehistory of >>>>>> the MS by looking at the incomplete erasing. ;) >>>>>> Cheers >>>>>> >>>>>> Phil Hobbs >>>>>> (Proud owner of a lifetime supply of Clearprint) >>>>> So where in this benighted continent - i.e. Europe - can I obtain this >>>>> miraculous parchment? Anyone know? A3 or A4 would be nice! >>>>> >>>>> John Larkin guarantees it will increase my IQ by 10 points and allow me >>>>> to become a Real Engineer at last. >>>>> >>>>> (I tried printing out a faint squared pattern on my laserjet and it's not >>>>> bad. But I feel I am missing out on the true experience). >>>>> >>>> Dunno. But first class vellum is beautiful--you can erase something 10 >>>> times and it looks like you got it right the first time. (Which might >>>> have something to do with the apparent IQ increase.) ;) If you aren't >>>> allergic to inches, the good stuff is 1000H 1010 with the blue fadeout grid. >>>> >>>> Their international dealer list is at >>>> http://www.clearprintpapercompany.com/media/dealers/international_dealers.html >>>> There's one in Germany and one in Italy. >>>> >>>> Cheers >>>> >>>> Phil Hobbs >>> This >>> >>> ftp://jjlarkin.lmi.net/FilterBoard.jpg >>> >>> becomes this: >>> >>> ftp://jjlarkin.lmi.net/Filter1.jpg >>> >> Easy on the solder paste there, guys ... :-) >> >> [...] > > Engineering unit, hand soldered. > Ok, yeah, mine also end up with those large blobs of solder when done by Weller. The Kester No-Clean 15mils is the smallest diameter solder with decent behavior that I could find. Does anyone know smaller stuff? -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: John Larkin on 28 Oct 2009 17:58 On Wed, 28 Oct 2009 14:53:37 -0700, Joerg <invalid(a)invalid.invalid> wrote: >John Larkin wrote: >> On Wed, 28 Oct 2009 13:04:58 -0700, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> John Larkin wrote: >>>> On Wed, 28 Oct 2009 12:52:24 -0400, Phil Hobbs >>>> <pcdhSpamMeSenseless(a)electrooptical.net> wrote: >>>> >>>>> John Devereux wrote: >>>>>> Phil Hobbs <pcdhSpamMeSenseless(a)electrooptical.net> writes: >>>>>> >>>>>>> Jan Panteltje wrote: >>>>>>>> On a sunny day (Tue, 27 Oct 2009 17:45:49 -0700 (PDT)) it happened Tim >>>>>>>> Williams <tmoranwms(a)gmail.com> wrote in >>>>>>>> <3e89ba34-8f94-452a-bc7c-5eb86e00f912(a)k26g2000vbp.googlegroups.com>: >>>>>> [...] >>>>>> >>>>>>>>> When I wanted to do a complete layout of this circuit, I did it on a >>>>>>>>> full sheet of newsprint. Old crummy stuff, it ain't vellum, but it >>>>>>>>> was on hand. Then I put it on the computer (in A4 size sections). >>>>>>>>> >>>>>>>>> http://myweb.msoe.edu/williamstm/Images/EV_Paper_Draft.jpg >>>>>>>>> >>>>>>>>> Tim >>>>>>>> Yep, >>>>>>>> ftp://panteltje.com/pub/fdc-1.jpg >>>>>>>> ftp://panteltje.com/pub/fdc-2.jpg >>>>>>>> Note the date (top right). >>>>>>>> >>>>>>> Wow, an ancient manuscript. Didn't they have ruled vellum in those >>>>>>> days? Of course then you wouldn't be able to trace the prehistory of >>>>>>> the MS by looking at the incomplete erasing. ;) >>>>>>> Cheers >>>>>>> >>>>>>> Phil Hobbs >>>>>>> (Proud owner of a lifetime supply of Clearprint) >>>>>> So where in this benighted continent - i.e. Europe - can I obtain this >>>>>> miraculous parchment? Anyone know? A3 or A4 would be nice! >>>>>> >>>>>> John Larkin guarantees it will increase my IQ by 10 points and allow me >>>>>> to become a Real Engineer at last. >>>>>> >>>>>> (I tried printing out a faint squared pattern on my laserjet and it's not >>>>>> bad. But I feel I am missing out on the true experience). >>>>>> >>>>> Dunno. But first class vellum is beautiful--you can erase something 10 >>>>> times and it looks like you got it right the first time. (Which might >>>>> have something to do with the apparent IQ increase.) ;) If you aren't >>>>> allergic to inches, the good stuff is 1000H 1010 with the blue fadeout grid. >>>>> >>>>> Their international dealer list is at >>>>> http://www.clearprintpapercompany.com/media/dealers/international_dealers.html >>>>> There's one in Germany and one in Italy. >>>>> >>>>> Cheers >>>>> >>>>> Phil Hobbs >>>> This >>>> >>>> ftp://jjlarkin.lmi.net/FilterBoard.jpg >>>> >>>> becomes this: >>>> >>>> ftp://jjlarkin.lmi.net/Filter1.jpg >>>> >>> Easy on the solder paste there, guys ... :-) >>> >>> [...] >> >> Engineering unit, hand soldered. >> > >Ok, yeah, mine also end up with those large blobs of solder when done by >Weller. The Kester No-Clean 15mils is the smallest diameter solder with >decent behavior that I could find. Does anyone know smaller stuff? The problem with no-clean solder is that it's so hard to clean. John
From: krw on 28 Oct 2009 19:48 On Tue, 27 Oct 2009 19:42:41 -0700, John Larkin <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: >On Tue, 27 Oct 2009 18:20:41 -0700, Joerg <invalid(a)invalid.invalid> >wrote: > >>John Larkin wrote: >> >>[...] >> >>> Yup, I do my schematics with pencil on D-size vellum, and give them to >>> The Brat to cad for me. >>> >> >>But don't overdo it. She may some day be the one deciding which nursing >>home your are going to live at ... > >Heck, all of engineering, including me, are working for her already. > >R wants her to do FPGA design next. So I'm scheduled to do a couple of >lectures on basic digital design concepts, and then he'll do a couple >on FPGAs and VHDL in particular. As long as she's hasn't done much programming, particularly in C, she has a shot. If she has, forget it. Her brain is already fried.
From: John Larkin on 28 Oct 2009 20:11
On Wed, 28 Oct 2009 18:48:12 -0500, krw <krw(a)att.bizzzzzzzzzzz> wrote: >On Tue, 27 Oct 2009 19:42:41 -0700, John Larkin ><jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote: > >>On Tue, 27 Oct 2009 18:20:41 -0700, Joerg <invalid(a)invalid.invalid> >>wrote: >> >>>John Larkin wrote: >>> >>>[...] >>> >>>> Yup, I do my schematics with pencil on D-size vellum, and give them to >>>> The Brat to cad for me. >>>> >>> >>>But don't overdo it. She may some day be the one deciding which nursing >>>home your are going to live at ... >> >>Heck, all of engineering, including me, are working for her already. >> >>R wants her to do FPGA design next. So I'm scheduled to do a couple of >>lectures on basic digital design concepts, and then he'll do a couple >>on FPGAs and VHDL in particular. > >As long as she's hasn't done much programming, particularly in C, she >has a shot. If she has, forget it. Her brain is already fried. No programming at all. I was explaining to her, at the bar at Zuni, how programmers execute a line of code at a time. And then I said, imagine that you're looking at a scene full of still objects. When you blink your eyes, a clock ticks, and when you open them again everything has moved, all at once. That's synchronous logic. She said "sure." So there's hope. John |