How do you design these days?
in [Design]
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From: Nico Coesel on 31 Dec 2009 19:09 Joerg <invalid(a)invalid.invalid> wrote: >Jan Panteltje wrote: >> On a sunny day (Thu, 31 Dec 2009 14:54:10 -0800) it happened Joerg >> <invalid(a)invalid.invalid> wrote in <7q4ocpFid2U2(a)mid.individual.net>: >>>> Real man use no PeeSeeBee: >>>> ftp://panteltje.com/pub/z80/graphics_card_top.jpg >>>> ftp://panteltje.com/pub/z80/graphics_card_bottom.jpg >>>> :-) >>>> >>> <GASP> >>> >>> I think I am going to get sick ... >> >> Have to point out that that worked without a single problem for > 10 years. >> And it will likely still work if the EPROM has not lost data. >> But it has been superseded by better tech. >> You are not afraid of soldering some wires no? > > >Not at all, but I use thin copper-enameled wires and run them in orderly >fashion :-) I think I have similar boards somewhere but enamel wire is the way to go. -- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico(a)nctdevpuntnl (punt=.) --------------------------------------------------------------
From: Jan Panteltje on 31 Dec 2009 19:10 On a sunny day (Fri, 01 Jan 2010 00:52:39 +0100) it happened Falk Willberg <Faweglassenlk(a)falk-willberg.de> wrote in <hhjd5b$lco$1(a)news2.open-news-network.org>: >Jan Panteltje schrieb: >> On a sunny day (Thu, 31 Dec 2009 14:54:10 -0800) it happened Joerg >> <invalid(a)invalid.invalid> wrote in <7q4ocpFid2U2(a)mid.individual.net>: >>>> Real man use no PeeSeeBee: >>>> ftp://panteltje.com/pub/z80/graphics_card_top.jpg > >Why did I know that I would see an 6845 when it completely loaded? > >>>> ftp://panteltje.com/pub/z80/graphics_card_bottom.jpg >>>> :-) >>>> >>> <GASP> >>> >>> I think I am going to get sick ... >> >> Have to point out that that worked without a single problem for > 10 years. > >That's the annoying thing with this kind of "implementation": It often >just works. > >> And it will likely still work if the EPROM has not lost data. >> But it has been superseded by better tech. >> You are not afraid of soldering some wires no? > >My first CP/M computer was made the same way, but I used enameled copper >wire[0] on the solder side only. My brother wrote his first 100+ job >applications on this beast (Wordstar + DBase). > >Falk >[0]I still use it: http://falk-willberg.de/LiPo-Lader-web.JPG (the 5 >"thick" wires) Yes, same here, I uses strands from strands from flat cable, no isolation to burn.
From: Joerg on 31 Dec 2009 19:17 MooseFET wrote: > On Dec 31, 1:55 pm, n...(a)puntnl.niks (Nico Coesel) wrote: >> Raveninghorde <raveninghorde(a)invalid> wrote: >>> On Thu, 31 Dec 2009 06:25:56 -0800 (PST), MooseFET >>> <kensm...(a)rahul.net> wrote: >>>> On Dec 30, 6:01 pm, "RogerN" <re...(a)midwest.net> wrote: >>>>> When I was in school components fit on solderless breadboards and we made >>>>> circuits using breadboards, power supplies, meters and oscilloscopes. Many >>>>> of today's components don't appear to be breadboard friendly, so how is it >>>>> done today? >>>>> Is circuit design software and simulation good enough to go straight to a PC >>>>> board? Or do you use surface mount to breadboard adapters? Do you still >>>>> use a soldering Iron to solder or paste solder and an oven? >>>>> I'm wanting to tinker with some circuits but some chips I'm interested in >>>>> only comes in MSOP or other packages that look intimidating to attempt to >>>>> solder. >>>> I use ExpressPCB to make boards for parts of the design. Things like >>>> power supplies are made as a PCB with connectors that are wired to the >>>> other boards. I use 1206 parts and put in some extra parts and layout >>>> such that cuts and jumps are easy(ish) to do. >>>>> Thanks! >>>>> RogerN >>> Think. Read data sheets. Think. CAD. Make on production line. >>> Pcb design rarely takes longer than a lash up on strip board or >>> whatever and always works better. >>> Very occasionally I have lashed up a small part of a design but I >>> almost always regret the waste of time. >> The truth lies somewhere in between. I use whatever seems most handy >> given the situation. For analog I use simulation a lot but it always >> gets prototyped. SMD components either end up as a dead bug on >> prototyping board or a small dedicated PCB. RF and power means having >> a small PCB made. Sometimes I like to try things like a new >> microcontroller. I usually make universal (=a load of via's to connect >> wires to) boards out of such a project so they can serve as a >> kickstart for prototyping other projects. > > It is very hard to hook a spice model to the real transducers. > Making a spice model of the transducer isn't so easy when it is > pushing the limits of physics and you have to assume that the physics > guy got it exactly right when he did his equations. > Yup. It is very hard to model backing materials, acoustic matching layers, crosstalk and all that. This either needs to be characterized via some other software or measured. One attempt in doing it mathematically ended with a first generation Pentium processor going tchk ... *PHUT*. [...] -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Joerg on 31 Dec 2009 19:22 Jan Panteltje wrote: > On a sunny day (Thu, 31 Dec 2009 15:52:38 -0800) it happened Joerg > <invalid(a)invalid.invalid> wrote in <7q4rqdF317U2(a)mid.individual.net>: > >> Jan Panteltje wrote: >>> On a sunny day (Thu, 31 Dec 2009 14:54:10 -0800) it happened Joerg >>> <invalid(a)invalid.invalid> wrote in <7q4ocpFid2U2(a)mid.individual.net>: >>>>> Real man use no PeeSeeBee: >>>>> ftp://panteltje.com/pub/z80/graphics_card_top.jpg >>>>> ftp://panteltje.com/pub/z80/graphics_card_bottom.jpg >>>>> :-) >>>>> >>>> <GASP> >>>> >>>> I think I am going to get sick ... >>> Have to point out that that worked without a single problem for > 10 years. >>> And it will likely still work if the EPROM has not lost data. >>> But it has been superseded by better tech. >>> You are not afraid of soldering some wires no? >> >> Not at all, but I use thin copper-enameled wires and run them in orderly >> fashion :-) > > Bu the vapour of the enamel is poisenous :-). > I tried that stuff, it stinks. Roll yourself a Van Nelle Halfzwaar, light up, and all the smell is muffled :-) > Normally I use flat cable: > ftp://panteltje.com/pub/z80/sound_card_bottom.jpg What's that ugly big silvery thing on the right? > ftp://panteltje.com/pub/z80/soundcard_top.jpg Looks like the cat peed over the speaker :-) > That flat vertical thing is a R2R network, the DAC. > Top right an electret mike, > Bottom right a DC-DC converter for the negative voltage of the TIL084s > Audio amp: LM380, > ADC: ADC804 > SAA1099 for sound effects... (did not really use that, used wave tables). > the resistors and caps in the IC sockets are part of the anti-aliasing filters. > Also wrote a sound editor for it, all 8 bits of course. > Main thing is, it works. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Falk Willberg on 31 Dec 2009 19:29
Jan Panteltje schrieb: > <snip> Falk <snip> wrote: >> [0]I still use it: http://falk-willberg.de/LiPo-Lader-web.JPG (the 5 >> "thick" wires) > > Yes, same here, I uses strands from strands from flat cable, no isolation to burn. Very useful. The remaining flat cable makes a good handle. See the other wires in the above link. Happy new year, Falk consult42.com/tmp/fireworks2010-0.5MB.mpg consult42.com/tmp/fireworks2010-11MB.mpg |