[sdiy] basics recommendation PCB pumpkin carver
charlie wallace
charlie at finitemonkeys.com
Thu Mar 3 18:39:24 CET 2016
pcb mills have come down considerably in price. check out the
othermill, its no lpkf or accuratecnc(which i have as does nasa and it
is great) but technology has moved on,. a lot of people are still
living in the 90s/00s when it comes to talking about manufacturing.
even if you wanted a higher end mill, you can grab them off ebay for
3-6KUSD and they don't just cut PCB's
On Thu, Mar 3, 2016 at 9:12 AM, Rob <roomberg at ptd.net> wrote:
> $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> 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> 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
>>> <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
>>> <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> 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
>>>
>>> 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>
>>> >Sent: Mar 1, 2016 2:23 PM
>>> >To: Oakley Sound <oakleylist at btinternet.com>
>>> >Cc: Synth DIY <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> 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/
>>> >>
>>> >> _______________________________________________
>>> >> Synth-diy mailing list
>>> >> Synth-diy at dropmix.xs4all.nl
>>> >> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>> >
>>> >
>>> >
>>> >--
>>> >Karsten Schmidt
>>> >http://postspectacular.com | http://thi.ng |
>>> http://toxiclibs.org
>>> >_______________________________________________
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