[sdiy] basics recommendation PCB pumpkin carver
Rob
roomberg at ptd.net
Thu Mar 3 18:12:51 CET 2016
$15 PCB..... pumpkin carver
http://www.learnmorsecode.com/help/cwmosfetb4.jpg
http://www.learnmorsecode.com/help/cwmosfetb3.jpg
http://www.learnmorsecode.com/help/cwpmosfet.html
Probably not used by NASA
On 03/03/2016 11:08 AM, Sarah Thompson wrote:
> Until a month ago, I *did* work for NASA. We sent nearly all of our
> boards out for fabrication. I think there was a milling machine
> somewhere at Ames that could make boards, but to my knowledge nobody
> ever used it. It would only ever have been used for prototyping anyway
> since boards made that way don't meet flight standards.
>
> I probably designed roughly 12 or 15 boards in the time I was EEing
> there -- quite a few prototypes actually went to OSH Park. For-real
> flight boards typically went to the high-end board fab houses around
> Silicon Valley, who do a fantastic job but REALLY AREN'T CHEAP.
>
> Sarah
>
> On Thu, Mar 3, 2016 at 1:47 AM, Roman Sowa <modular at go2.pl
> <mailto:modular at go2.pl>> wrote:
>
> An entry level milling PCB router from LPKF cost more than 200
> differnet prototype boards per year for at least 10 years. Can't
> remember actual quoted price but I remember that calculation I
> made back then.
> And that's 200 PCBs ordered in reputable 24-hours service fab.
>
> So unless you are not planing to make PCB making service to the
> public it's not worth buying that. Unless you work for NASA ;)
>
> And I think laser ones is 10 times more expensive, but I never
> bothered to ask.
> OTOH there are many PCB makers now from kickstarters and such,
> they go for much lower price but don't know anything about their
> performance.
>
> When I need it the same day, there's toner transfer and etching.
> Otherwise I simply order top-notch quality PCB for $40 and have it
> on my desk next week. No chamicals, no glass dust in my lungs, no
> big investment.
>
> Roman
>
> W dniu 2016-03-03 o 00:37, Chris Juried pisze:
>
> I would love to get my hands on a laser cuter for prototyping.
> Any idea
> what these are running, on the entry level machines?
>
> Best,
>
> Chris
> http://www.JuriedEngineering.com
>
>
> On Wed, Mar 2, 2016 at 6:11 PM, john slee
> <indigoid at oldcorollas.org
> <mailto:indigoid at oldcorollas.org>> wrote:
>
> I like the straight-to-PCB approach. Also if you're likely
> to need a
> rev2 anyway, you can use some of the spare space on the
> rev1 PCB to
> validate any new part footprints you made, related or not :-)
>
> The world we live in now, where magical websites (or, as
> is more
> likely in my case, the laser-cutter at the local
> hackerspace) very
> accurately turn our design mistakes into reality and pop
> them in the
> post for $15... It's pretty amazing, no?
>
> John
>
> On 3 March 2016 at 09:59, Kylee Kennedy
> <kmkennedy at gmail.com <mailto:kmkennedy at gmail.com>
> <javascript:return>> wrote:
>
> A few of the larger eurorack manufacturers I've talk
> to do not
> use Spice or much of any sim software. It's so
> affordable and
> quick to just have some small pcbs made these days
> they commit
> ideas to hardware and test there. Thanks to OSHpark!
>
> Learn some CAD software and start making stuff.
> Kylee
>
>
> On Wednesday, March 2, 2016, Sarah Thompson
> <plodger at gmail.com <mailto:plodger at gmail.com>
> <javascript:return>> wrote:
>
> One of the most useful things about adding LTSPICE
> or some
> other simulator to learning electronics is it lets
> you try
> lots of things really quickly. Most of them
> actually will
> work just fine in physical hardware, but the
> exceptions are
> a really important learning experience in and of
> themselves
> -- I've seen that light go on in the eyes of younger
> engineers that I've mentored. There tends to be a
> culture
> these days that has it that circuit design is
> everything and
> PCB layout is a (relatively) menial task. That
> attitude
> doesn't last long when you can't get a 10MHz clock
> from one
> side of a board to the other because you tried to
> send it
> across a break in the ground plane. At audio
> frequencies we
> can get away with all manner of murder, which is why
> everyone should try RF at least once! :-)
>
> Sarah
>
> On Wed, Mar 2, 2016 at 6:41 AM, BrightBoy
> <jdec at mindspring.com <mailto:jdec at mindspring.com>>
> wrote:
>
> Don't forget the classic tome, "Musical
> Applications of
> Microprocessors"
> by Hal Chamberlin.
>
> Contents can be seen here:
>
> http://www.mindspring.com/~jdec/book/MAM.jpg
> <http://www.mindspring.com/%7Ejdec/book/MAM.jpg>
>
> It's a perfect blend of analog, digital and
> analog/digital hybrid synth design.
>
> I have the last remaining supply of the
> hardcover 2nd
> edition. All copies
> are new-old-stock (new, mint and un-read)
> straight from
> the Sam's/Hayden
> shipping boxes.
>
> Price is $52 USD shipped in the USA and $71
> USD shipped
> to most worldwide
> destinations.
>
> Email me PRIVATELY if anyone is interested in
> picking up
> this holy grail
> reference book.
>
> Jeff
>
> -----Original Message-----
> >From: Karsten Schmidt <info at toxi.co.uk
> <mailto:info at toxi.co.uk>>
> >Sent: Mar 1, 2016 2:23 PM
> >To: Oakley Sound <oakleylist at btinternet.com
> <mailto:oakleylist at btinternet.com>>
> >Cc: Synth DIY <synth-diy at dropmix.xs4all.nl
> <mailto:synth-diy at dropmix.xs4all.nl>>
> >Subject: Re: [sdiy] Audio circuits and basic
> electronics knowledge recommendation.
> >
> >There's a great collection of beginner links on
> Muffwiggler:
>
> >https://www.muffwiggler.com/forum/viewtopic.php?t=2795
> >
> >On 1 March 2016 at 09:02, Oakley Sound
> <oakleylist at btinternet.com
> <mailto:oakleylist at btinternet.com>> wrote:
> >> This set of articles written by Rod
> Elliott are a
> really good read:
> >>
> >> http://sound.westhost.com/articles.htm
> >>
> >> The beginners' stuff is about two thirds
> of the way
> down the page.
> >>
> >> Tony
> >>
> >> http://www.oakleysound.com/
> >>
> >>
> _______________________________________________
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> >
> >
> >
> >--
> >Karsten Schmidt
> >http://postspectacular.com | http://thi.ng |
> http://toxiclibs.org
> >_______________________________________________
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