<div dir="ltr">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.<div><br></div><div>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.</div><div><br></div><div>Sarah</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 3, 2016 at 1:47 AM, Roman Sowa <span dir="ltr"><<a href="mailto:modular@go2.pl" target="_blank">modular@go2.pl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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.<br>
And that's 200 PCBs ordered in reputable 24-hours service fab.<br>
<br>
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 ;)<br>
<br>
And I think laser ones is 10 times more expensive, but I never bothered to ask.<br>
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.<br>
<br>
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.<br>
<br>
Roman<br>
<br>
W dniu 2016-03-03 o 00:37, Chris Juried pisze:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
I would love to get my hands on a laser cuter for prototyping. Any idea<br>
what these are running, on the entry level machines?<br>
<br></span>
Best,<br>
<br>
Chris<br>
<a href="http://www.JuriedEngineering.com" rel="noreferrer" target="_blank">http://www.JuriedEngineering.com</a><br>
<br>
<br>
On Wed, Mar 2, 2016 at 6:11 PM, john slee<span class=""><br>
<<a href="mailto:indigoid@oldcorollas.org" target="_blank">indigoid@oldcorollas.org</a>> wrote:<br>
<br>
I like the straight-to-PCB approach. Also if you're likely to need a<br>
rev2 anyway, you can use some of the spare space on the rev1 PCB to<br>
validate any new part footprints you made, related or not :-)<br>
<br>
The world we live in now, where magical websites (or, as is more<br>
likely in my case, the laser-cutter at the local hackerspace) very<br>
accurately turn our design mistakes into reality and pop them in the<br>
post for $15... It's pretty amazing, no?<br>
<br>
John<br>
<br>
On 3 March 2016 at 09:59, Kylee Kennedy <<a href="mailto:kmkennedy@gmail.com" target="_blank">kmkennedy@gmail.com</a><br></span><span class="">
<javascript:return>> wrote:<br>
<br>
A few of the larger eurorack manufacturers I've talk to do not<br>
use Spice or much of any sim software. It's so affordable and<br>
quick to just have some small pcbs made these days they commit<br>
ideas to hardware and test there. Thanks to OSHpark!<br>
<br>
Learn some CAD software and start making stuff.<br>
Kylee<br>
<br>
<br>
On Wednesday, March 2, 2016, Sarah Thompson <<a href="mailto:plodger@gmail.com" target="_blank">plodger@gmail.com</a><br></span><div><div class="h5">
<javascript:return>> wrote:<br>
<br>
One of the most useful things about adding LTSPICE or some<br>
other simulator to learning electronics is it lets you try<br>
lots of things really quickly. Most of them actually will<br>
work just fine in physical hardware, but the exceptions are<br>
a really important learning experience in and of themselves<br>
-- I've seen that light go on in the eyes of younger<br>
engineers that I've mentored. There tends to be a culture<br>
these days that has it that circuit design is everything and<br>
PCB layout is a (relatively) menial task. That attitude<br>
doesn't last long when you can't get a 10MHz clock from one<br>
side of a board to the other because you tried to send it<br>
across a break in the ground plane. At audio frequencies we<br>
can get away with all manner of murder, which is why<br>
everyone should try RF at least once! :-)<br>
<br>
Sarah<br>
<br>
On Wed, Mar 2, 2016 at 6:41 AM, BrightBoy<br>
<<a href="mailto:jdec@mindspring.com" target="_blank">jdec@mindspring.com</a>> wrote:<br>
<br>
Don't forget the classic tome, "Musical Applications of<br>
Microprocessors"<br>
by Hal Chamberlin.<br>
<br>
Contents can be seen here:<br>
<br>
<a href="http://www.mindspring.com/~jdec/book/MAM.jpg" rel="noreferrer" target="_blank">http://www.mindspring.com/~jdec/book/MAM.jpg</a><br>
<br>
It's a perfect blend of analog, digital and<br>
analog/digital hybrid synth design.<br>
<br>
I have the last remaining supply of the hardcover 2nd<br>
edition. All copies<br>
are new-old-stock (new, mint and un-read) straight from<br>
the Sam's/Hayden<br>
shipping boxes.<br>
<br>
Price is $52 USD shipped in the USA and $71 USD shipped<br>
to most worldwide<br>
destinations.<br>
<br>
Email me PRIVATELY if anyone is interested in picking up<br>
this holy grail<br>
reference book.<br>
<br>
Jeff<br>
<br>
-----Original Message-----<br>
>From: Karsten Schmidt <<a href="mailto:info@toxi.co.uk" target="_blank">info@toxi.co.uk</a>><br>
>Sent: Mar 1, 2016 2:23 PM<br>
>To: Oakley Sound <<a href="mailto:oakleylist@btinternet.com" target="_blank">oakleylist@btinternet.com</a>><br>
>Cc: Synth DIY <<a href="mailto:synth-diy@dropmix.xs4all.nl" target="_blank">synth-diy@dropmix.xs4all.nl</a>><br>
>Subject: Re: [sdiy] Audio circuits and basic electronics knowledge recommendation.<br>
><br>
>There's a great collection of beginner links on<br>
Muffwiggler:<br>
><a href="https://www.muffwiggler.com/forum/viewtopic.php?t=2795" rel="noreferrer" target="_blank">https://www.muffwiggler.com/forum/viewtopic.php?t=2795</a><br>
><br>
>On 1 March 2016 at 09:02, Oakley Sound<br>
<<a href="mailto:oakleylist@btinternet.com" target="_blank">oakleylist@btinternet.com</a>> wrote:<br>
>> This set of articles written by Rod Elliott are a<br>
really good read:<br>
>><br>
>> <a href="http://sound.westhost.com/articles.htm" rel="noreferrer" target="_blank">http://sound.westhost.com/articles.htm</a><br>
>><br>
>> The beginners' stuff is about two thirds of the way<br>
down the page.<br>
>><br>
>> Tony<br>
>><br>
>> <a href="http://www.oakleysound.com/" rel="noreferrer" target="_blank">http://www.oakleysound.com/</a><br>
>><br>
>> _______________________________________________<br>
>> Synth-diy mailing list<br>
>> <a href="mailto:Synth-diy@dropmix.xs4all.nl" target="_blank">Synth-diy@dropmix.xs4all.nl</a><br>
>> <a href="http://dropmix.xs4all.nl/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">http://dropmix.xs4all.nl/mailman/listinfo/synth-diy</a><br>
><br>
><br>
><br>
>--<br>
>Karsten Schmidt<br>
><a href="http://postspectacular.com" rel="noreferrer" target="_blank">http://postspectacular.com</a> | <a href="http://thi.ng" rel="noreferrer" target="_blank">http://thi.ng</a> |<br>
<a href="http://toxiclibs.org" rel="noreferrer" target="_blank">http://toxiclibs.org</a><br>
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<br>
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<br>
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--<br>
[s]<br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">[s]</div>
</div>