It's good that this is a long video. All these options used to intimidate the hell out of me back in the day so it's great that you've made such a thorough guide for beginners. A flex PCB series from start to finish would be cool!
@p_mouse86764 жыл бұрын
I agree with the information point of view, even said from a professional. But the video could be a lot shorter.
@xnetworkDEVILx4 жыл бұрын
Omg ....teacher you are alive 😭😭😭
@Stormbolter4 жыл бұрын
@@p_mouse8676 I guess you haven't seen much videos from EEV. This guy reeeeeallly loves talking :D
@p_mouse86764 жыл бұрын
@@Stormbolter I guess I have been there from the start even maybe. I am sorry, but good narrating also involves good editing of the videos. Just pausing and fast-forwarding is not gonna change that. But I guess science only applies on the things people want to apply it too.
@richardlighthouse53284 жыл бұрын
Goddamn it, when you upload. Stop wasting time on watching some others peoples videos, its procrastination.
@ChipGuy4 жыл бұрын
1:03:40: I have been told by Beta Layout PCB Pool, that the Impedance control box will make sure you really get a 4 layer stackup instead of getting a 6 layer stackup by chance. Reason: Sometimes they fill up 6 layer panels with 4 layer designs when they don't have enough 6 layer designs to fill up the panel.So you end up with different prepreg thicknesses, hence different impedance.
@GeneralPose5 жыл бұрын
Would love to see you design a flex-pcb. I wouldn't mind if you did it in kicad, wink wink.
@Dave52819684 жыл бұрын
Thumbs up to the idea of doing a flex-pcb video or series in KiCad!
@Daniel-ib5bx4 жыл бұрын
He already did one or two lol
@adbethsing3834 жыл бұрын
A note on FR Tg130 vs Tg 170+ ... .where I find this really comes into play is not in the actual circuit under operation, but during prototyping phases and stages where you're pulling off and soldering back on different components for testing and tuning. For example, trying to get the feedback network right in an active filter ... or, the compensation in a DC/DC converter. Sometimes empirical study is quicker than trying to do diff. eq. The simple fact is that if you're pulling SMT caps/resistors or other components off the prototype PCB, it is much much easier to lift pads on Tg130 than it is on Tg170+. Tg170 survives soldering iron / desoldering iron/tweezer abuse much more readily. Once my prototype / dev board is good to go, I'll usually order production quantities on Tg130
@chaos.corner5 жыл бұрын
I designed a few PCBs back in the early 2000s and prototypes were so expensive that my boss told me just to order 200 PCB production runs and try to make sure I didn't make any mistakes. Prices are astoundingly cheap now.
@EEVblog4 жыл бұрын
LOL, yep, I remember those days. You couldn't get a decent prototype made for under $800 or so here. You had to by the whole panel. When prototype panels prices came down to $300 a panel that was remarkable.
@steverobbins48725 жыл бұрын
Yes, please do a video on flex PCBs. I recently ordered my first flex boards and they were really expensive. I'd love to see some tips on how to hold the cost down.
@BlueLiquidCell695 жыл бұрын
I think the Thermal conductivity @19:10 should be Watts per Meter Kelvin not milli Kelvin ;-)
@EEVblog5 жыл бұрын
Doh, yes. Must engage brain next time.
@abpccpba5 жыл бұрын
who cares
@KeanM4 жыл бұрын
@@abpccpba Anyone doing thermal calculations would care
@uwezimmermann54274 жыл бұрын
@@KeanM yes - but we also know. Especially when you are used to communicate with people from non-metric countries as well ;-)
@Tim_Small4 жыл бұрын
As a lowly programmer, I was just happy that I finally found something I knew, that Dave didn't...
@Spirit5325 жыл бұрын
Accidentally watched the entire video without realizing how long it was. This is *the* concise explanation of all the manufacturing processes, and a very nice guide to navigating them.
@EEVblog5 жыл бұрын
I wouldn't say concise!
@Spirit5325 жыл бұрын
@@EEVblog Given the number of options, can't make it much shorter!
@DanielPierce4 жыл бұрын
This is a great guide for anyone who has a question about certain aspects of the ordering process, especially for the hobbyists among us! Thanks for the video!
@JW-uC4 жыл бұрын
The chances of me ever having a board made are zero to none... but I still find your vids on these things fascinating (and takes me back to my first job out of school, before I changed industry - many years ago).
@Mtaalas4 жыл бұрын
Again a video that would have saved me countless hours, if not days of trying to figure this stuff out back in the day... You have no idea how important these videos are since they come directly from an EE :)
@Pete2923235 жыл бұрын
Dave: "42 minutes long, geez, that's a watch isn't it?" Also Dave: Proceeds to make a 1 hour and 10 minute long video.
@EEVblog5 жыл бұрын
No correspondence will be entered into.
@michelfeinstein4 жыл бұрын
Edge plating also helps with heat dissipation
@jlegen4 жыл бұрын
Silly me always chose options around „keeping the cart at those 5 dollars“ ;-) - many thanks for this profound enlightning!
@jmonsted4 жыл бұрын
Can we just take a minute to appreciate that Dave uses bing and actually gets a useful result?
@EEVblog24 жыл бұрын
Only because I don't usually use it so it's a "clean" browser for video capture purposes.
@MICHhimself4 жыл бұрын
@@EEVblog2 I think DuckDuckGo would also work for that as they don't do tracking, so past searches shouldn't affect the search results for the video.
@Dave52819684 жыл бұрын
Bing is better for technical searches. Always has been.
@IvoTrausch4 жыл бұрын
@@EEVblog2 So, what have we been googling recently? (͡ ° ͜ʖ ͡ °)(͡ ° ͜ʖ ͡ °)(͡ ° ͜ʖ ͡ °)
@iyatemu5 жыл бұрын
One thing you didn't mention is that a few options can be mixed and these mixes can actually affect cost substantially. If you're designing a card but just need a couple of prototypes for actual fitment or final circuit testing, or as an intermediate step to further build on before officially adding changes, you can select the gold fingers option, AND ask for beveled edges, but keep the surface finish as HASL. You can then order the board and build it up and test to see if it works at all without spending the $200 on the gold fingers. Because of this mix though, cost can also be affected in strange ways. You can order a batch of cards with HASL on the main board but ask for hard gold on the card edge pins, but since this will be a two-stage process, it can actually be CHEAPER to coat the boards entirely in gold, rather than only the edge connector.
@CliveChamberlain9465 жыл бұрын
Thanks Dave! This is a one of a kind resource, major thanks to this Aussie industry veteran from Canada! Is there anything you DON'T know?
@ristomatti4 жыл бұрын
I was expecting to see a reply saying "I could do a whole video about it".
@BlackEpyon4 жыл бұрын
I wonder if there's a PCB manufacturer based in Canada that offers online prototyping runs? OSHPark is a bit more expensive than PCB Way, but OSH Park, I don't have to pay Customs import fees. I do this as a hobby, so I try to save money where I can.
@PilotPlater4 жыл бұрын
love it Dave. I just sent off my first PCB in about 5 years yesterday. Great to get back into it.
@imagesbyscott5 жыл бұрын
Hey Dave. Awesome video. Yes, please tell us about the flex PCB's.
@Aemilindore4 жыл бұрын
I remember learning these form you in an earlier video too. Its so nice to see you doing videos of this type again
@_adamalfath5 жыл бұрын
"If your circuit getting a 130-140 degree you'd better know what the hell you're doing" This made me laugh :D
@steverobbins48725 жыл бұрын
My experience is, when you tell a PCB maker that you have impedance-controlled traces they will actually tweek your line widths according to their proprietary empirical data. This usually gives tighter impedance control than you can get with an impedance calculator app, because they take into account things like plating thickness and undercutting. Also, if you made a mistake calculating your line widths, they will catch it.
@EEVblog5 жыл бұрын
Yes, I'd like to think they will catch it, but I still wouldn't want them touching my gerbers. It'd be ok to tweak the prepreg to match, but I'd prefer that they feedback this and it's sorted at the design stage and specified on the stackup. I don't like "secret sauce" data.
@Dave52819684 жыл бұрын
Yes! Please do a video on FPC soldering & application. Some how to on the ordering specs would also be very helpful! Thanks to you for doing all of these great videos Dave!
@MaartenBaert4 жыл бұрын
27:55 Actually it looks like that design *does* use blind vias ;). 44:25 Immersion silver is also used for RF equipment (like spectrum analyzers) because unlike ENIG it does not contain any ferromagnetic materials that will reduce the skin depth and increase losses.
@rutgerdejong96164 жыл бұрын
Thanks Dave for taking the time to go over all the options, I have learned a lot. Always went with the default settings for PCBs and that seems correct.
@opros74 жыл бұрын
1:05:00 Countersinks: Or you use some riveted pcb mounting post. When they are pressed in, they expand and may require a certain angle to expand so that it won't break the board.
@vidivana5 жыл бұрын
42:10 For OSP and Immersion gold 1U" the price is the same ($41). The form kept 3U" thickness selected. Another excellent educational video! Learned much new things! Thank you!
@monad_tcp5 жыл бұрын
43:18 audiophile products, dip everything in pure gold, even the caps
@planned_obsolescence5 жыл бұрын
When I design pcb's for audiophile applications, I never use gold plating. The complete pcb and its components are CNCed out of a block of solid gold. You can really hear the difference man
@EEVblog5 жыл бұрын
Then add Canadian maple wood PCB standoffs.
@Asu015 жыл бұрын
Don't forget gold-plated audio optic cable. Yes, such thing does exist on the market.
@chaos.corner5 жыл бұрын
Gold plated insulators.
@AttilaAsztalos4 жыл бұрын
Well it better be Oxygen-Free Gold or else...
@robfenwitch74035 жыл бұрын
"Send it to your metrology department" - Hmmm, it must be in the spare bedroom, I've not looked in there recently :)
@EEVblog5 жыл бұрын
Must be sharing with your marketing and human resources departments.
@GarryNichols4 жыл бұрын
Looking forward to the flex video. 👍
@michelfeinstein4 жыл бұрын
Dave, I would love to see a video where you talk about those obscure uses, metallurgy and etc. I probably won't ever use it, but I find it very interesting to know more about those special use cases.
@steverobbins48725 жыл бұрын
I saw a KZbin video by someone a couple of years ago who used an aluminum-backed PCB as the front panel of an instrument. Apparently, they will solder-mask (paint?) and silk-screen both sides, just like a normal PCB. I think he claimed it was actually a lot cheaper than going to a place that makes custom front panels. But I can't confirm this is true. Does anyone else know?
@EEVblog5 жыл бұрын
Yep, very likely cheaper to do it as a PCB, as that industry has been in a race to the bottom in price, so you benefit from that.
@Keex114 жыл бұрын
I have done this for small volume front panels for extruded enclosures as well. Works quite nicely in matte black. It is a lot cheaper than cnc parts and has more options than laser cut parts.
@steverobbins48724 жыл бұрын
@@Keex11 Thanks! Good to know.
@IgnazKevenaar5 жыл бұрын
Fantastic video Dave, very informative. I'd like to see a video (or even a mini-series of design->manufacture) one day of flex pcb's. I'd imagine those have all sorts of unique design and manufacture requirements of their own. Thanks for all the great content :)
@LebrelZ5 жыл бұрын
Hard gold is extremely difficult to solder to, but it's wire-bondable while ENIG isn't (ENEPIG is too). Immersion silver is used a lot in RF for surface-finishing uncoated traces (when you can't tolerate soldermask variability), as it's a very thin and even finish and minimizes skin effect losses. Also, the nickel in ENIG/ENEPIG ruins the day at (very) high frequencies due to its magnetic properties.
@michelfeinstein5 жыл бұрын
Congrats to Laen from OSHPark for his nice PCB Panel appearances
@EEVblog5 жыл бұрын
It's a great shot!
@ChipGuy4 жыл бұрын
Yes, please do a flex PCB video. Its useful if you have limited space and you need to use flat flex connections.
@SwitchAndLever5 жыл бұрын
So in the example you list why would you choose resin filled vias rather than plugged vias? Granted they'll be filled with different materials, but the via will still be conductive regardless.
@JesusisJesus4 жыл бұрын
YES, do the video.Why not. Dave's book 555 projects to make with a 555 would sell well with 555 flexi PCBs.
@artursmihelsons4155 жыл бұрын
Thank's Dave for explanation! :) Usually, for prototyping i'm make PCB's in home, but if i want to order some PCB's for bigger projects or mini mass production, this information will make my day better.. ;)
@chaos.corner5 жыл бұрын
It's so cheap and quick now that the only real reason to make your own is if you need them right now or you just really enjoy doing it.
@EEVblog4 жыл бұрын
I haven't made my own boards for maybe 15 years now.
@chuckpatten78555 жыл бұрын
If you do decide to go down the rabbit warren with rigid-flex design you might want to include forming the radius of the bend of the final flex shape using a cylindrical mandrel to determine the length of the individual flex layers.
@steverpcb4 жыл бұрын
Great video, but you stopped before dealing with stencils, I had a look back at one of your old videos where you used a stencil which was out of date. Do negative values for paste mask work, alignment holes to suit those in the boarder of the pcb, thickness, and other stuff ?
@simonhopkins38675 жыл бұрын
I've considered designing a board so many times but all this has just been too much. Thanks Dave.
@chaos.corner5 жыл бұрын
Give it a go. It's a fun skill to learn.
@cleverhandlename5 жыл бұрын
Perfect timing Dave. Just finished a schematic, going into pcb prototyping this week!
@timthompson4685 жыл бұрын
Thanks. That was very useful. I’ll share this around at work. I don’t need most of those options, but it’s good to know more about what is available.
@michelfeinstein4 жыл бұрын
Another reason for blind vias is to avoid stubs on high-speed circuits, that can cause reflections and distortions.
@thomasbecker96765 жыл бұрын
I've had a pretty good experience with JLC thus far for hobby-type boards. EDIT: I use black soldermask, but it was a concious choice, and I'm the only one assembling them.
@eGnarF4 жыл бұрын
Yeah, we really need a flexitron video =)
@justfabulous39414 жыл бұрын
About the "panel by manufacturer" option: I have experience with this specific manufacturer, they seem to be quite competent regarding their panel design. We had some back an forth regarding the edge quality of the finished product but came to a finished design within a day. They also provided me with the panel production files afterwards. I guess doing the panel yourself would give even more control but with the files in hand I could probably have them assembled without problems as well. Opinions?
@josephchiu40344 жыл бұрын
Edge plating are sometimes used by straddle-mount board edge sockets where the ground blade in the center of the connector connects direct into the planes.
@iainwalker87015 жыл бұрын
Can't imagine i will ever get a PCB made, but at least i have a good idea how to now. Very interesting video.
@captainchapan4 жыл бұрын
Would love a video on flex PCBs please!
@samuelschwager4 жыл бұрын
Very interesting video. There are so many options to choose from...
@Psi1055 жыл бұрын
27:30 That board does have some blind vias on it. The via's that have two color semicircle in the middle of them are blind. The via's that are just solid brown inside are normal via's. In this case you can see the two semicircles are red and purple which means they go between those two layers. Looks to be a 10 layer board with some blind via's from L1 to L9
@oleenick5 жыл бұрын
YES! A gigatron flex would be great.
@MarcAntoine015 жыл бұрын
YES! Really excited for this video!
@thomasesr5 жыл бұрын
Usually those most expensive boards 250 dollhairs for 5 boards are better to order in bigger quantities. Like instead of 250 for 5 boards you get 350 for 50 boards or something like that.
@poisonbiting56394 жыл бұрын
please do a video on flex PCBs.
@BuzzardSalve4 жыл бұрын
Very informative video dave. The flex pcb video would interest me ;)
@klazzera2 жыл бұрын
17:02, you got the concept about Tg right, but in this case it's about the resin. For the glass fibers themselves, the Tg is around 1000 degrees celcius.
@gustavlicht96205 жыл бұрын
Dave, a comment about the thermal conductivity, the unit is watt per meter-kelvin (as in a product of a meter and Kelvin), not watt per milli kelvin.
@cashewmilkfan Жыл бұрын
47:40 plain copper can work well if you are in a low voltage sensitive circuit connection since a direct copper to copper connection generates very little thermal emf.
@MattHollands5 жыл бұрын
Manufacturer adding UL marking makes sense because if you add it to your gerbers, and send it to a manufacturer who doesn't meet spec, it's not UL certified.
@excitedbox57054 жыл бұрын
That has to be some HDI via on your 1 layer board :D
@typxxilps4 жыл бұрын
Great explanation and serious approach to bring light in the jungles ... and in a pixeled way ... hope they stop spamming cause it is the modern ages pest or cholera choice.
@AlexA-nz6kk4 жыл бұрын
Dave, I think you are a bit wrong about a press-fit option. It is not intended for standoffs. Press-fit is for a special type of press-fit connectors (www.connectorsupplier.com/wp-content/uploads/press-fit-contact.gif) which are actually pressed into the board and have some spring type of contacts. Such technology provides better robustness to mechanical shock. If your hole would be less - the connector won't fit. If it would be a bit bigger - the connector won't stay at its place. That's why you need a better tolerance with such type of things.
@EEVblog24 жыл бұрын
I was just using that was an example, and I mentioned component legs.
@Mecalas5 жыл бұрын
Thanks for adding to my education. Great job as always mate!
@Zonkotron4 жыл бұрын
Current rating for a 48 V forklift VFD can be several hundred amps per phase. 4 and 8 ounces become very thin at those values ;)
@trickyrat4834 жыл бұрын
Wow, that was a long one. :) Great stuff, Dave.
@mattj22175 жыл бұрын
I hate when solder gets wicked down my hole.
@EEVblog4 жыл бұрын
It's the worst.
@Basement-Science4 жыл бұрын
What´s even worse is if your *_balls_* are wicked down a hole!
@pentachronic4 жыл бұрын
What's worse is when you get pop-corning in your hole !!
@darkwinter60285 жыл бұрын
You only want Goldfingers if you’re ordering 007 boards...
@tomaszwota14654 жыл бұрын
*plays Goldfinger theme*
@aaron415 жыл бұрын
"watts per mili kelvin" oof xD (watts per *meter* kelvin)
@kuukatti4 жыл бұрын
My guess about delivery time for more layers is that they require extra time for inner layers of prepreg to cure before they stack the whole sandwich
@TheHaters1125 жыл бұрын
By the Gods! I've never been this early for an EEVblog.
@povicollege30554 жыл бұрын
GREAT VIDEO Dave!!!!!!!!!!!!!!!!!!!
@demoncloud61474 жыл бұрын
Press fit holes is what I need !
@drussell_5 жыл бұрын
This will likely be an excellent, helpful resource for many people! :) Well done, great topic.
@PasiLassila4 жыл бұрын
I think the TG glass transition temperature is for the resin used in the PCB. Not for the glass fibres. PCBway can do both HASL and hard gold on the same board. I wonder what their process is for it.
@damny0utoobe3 жыл бұрын
Dave explains PCB options at PCBway
@Subbestionix2 жыл бұрын
"This video might be just as long!" *goes on 30% longer* xD Lovely video though! Second time i watch it now
@thomasesr5 жыл бұрын
I'm currently using PCBWAY with their assembly service and parts sourcing. I must say, didn't get a dud yet...
@thomasesr5 жыл бұрын
I usually only ask for them to assembly the real small smd's and chipies. And leave the bigger and through hole stuff to solder myself. Or, since they are already in China I ask them to source some components and leave them unsoldered because it will be cheaper to send them with the board since they buy locally than for ne to order a few parts from china. And it's usually cheaper
@Shadowdncer4 жыл бұрын
Dave: "If you choose matte black, it doesn't let you have a black silkscreen. That makes sense." Apple: "Hold my beer!"
@mr_gerber4 жыл бұрын
Yeah, I'm fairly certain Apple doesn't order their pcbs through the prototype web form of pcbway.com
@StreuB15 жыл бұрын
Finished.....I think I need a scotch and a cigarette, and I quit smoking 9 years ago. -long slow clap- this was excellent. Real top shelf stuff here Dave. Thank you and honestly, I can see this is only a beginning and can see some more knock-on videos down the road. You did too good of a job, people will want to go down the rabbit hole now. :-)
@EEVblog4 жыл бұрын
Thanks. There are endless rabbit holes here.
@1995epicfail4 жыл бұрын
i would love a rigid flex video.
@MatthewSuffidy5 жыл бұрын
It is amazing if the file formats totally describe all the parameters of all these features and is standard.
@DavidLeeKersey5 жыл бұрын
I could see use of Hard Gold for traces that are being used as control surfaces.
@EEVblog4 жыл бұрын
For sure.
@sablanex4 жыл бұрын
Do the flex PCB, that would be really interesting!
@renaudfensie30204 жыл бұрын
Nice open source padauk programmer PCB ;-) hope to get a vid about it
@nekomasteryoutube32324 жыл бұрын
Yeah I'd like to know about Flex PCB stuff. Most I've seen so far though is Chip on Flex stuff
@efeyzee5 жыл бұрын
Please make a flex PCB video
@RaithUK4 жыл бұрын
Great video thanks Dave, very helpful.
@randycarter20014 жыл бұрын
This kind of stuff they don't teach in electrical engineering college.
@alejandroperez53684 жыл бұрын
Because they're actually Electronics engineering stuff, but they don't teach you those things, because it's not something they can evaluate.
@TheEverardo1174 жыл бұрын
Fantastic video!
@petersage51573 жыл бұрын
Based on the turnaround time at three-letter-acronym PCB (only ordered two so far, but in both cases it took them less than an hour to fit the board onto a panel, so what's a "standard" panel size divided by one hundredth of a square meter?) and my experience in the service industry, I'd say these guys have a near-constant stream of cheap prototype orders coming in and take in enough just from the $2 orders to keep the staff well compensated, keep the lights on and still pocket a tidy sum at the end of the day. Part of my day job involves folding a helluva lotta boxes per day. I've often said "If I had a nickel..." Then I did the math and understood just how many nickels that would be. My point is, the cheap prototype PCB fabricators have the economies of scale to turn a profit.
@smurface5494 жыл бұрын
I wish this video existed when I ordered my first professionally made PCB, actually from the same manufacturer :-D Oh well, I just had sent a bunch of designs to save on the shipping, so now I'm a pro in avoiding any option that pushes the price beyond the $5 mark... (btw, seems like that game is lost as soon as one edge of the PCB gets longer than 100mm)
@DavidWilliams-ov4kn5 жыл бұрын
Great video, Dave.
@robertmccully27924 жыл бұрын
EEVblog #1 - Rigol DS1052E Oscilloscope Review 10 years ago.... What is the best scope now using that video as a guideline?
@DantalionNl4 жыл бұрын
39:21 Do I spot an unintended bridged connection on the usb connector?
@StreuB15 жыл бұрын
Ok, tacos are eaten, we're 40min in and man, this is JAM PACKED!!!! This is a stellar video so far. Makes me want to design some PCB's now!! Cept I don't know how.... :-\
@radry1004 жыл бұрын
You mention that 2 layer might be cheaper than 1 layer. What if I draw my layout in a way that just edges way all of the second layers copper? That would also result in a "2" layer board but functions like a 1 layer board.
@Basement-Science4 жыл бұрын
They will probably still plate all your through holes.