hybridfree/eevblog-posts huggingface dataset:
ENIG test pad with/without solder paste? - Page 1
Forum section: electronics / general

author: colotron
author_rank: Contributor
timestamp: January 25, 2014, 11:23:50 pm
content: Hello everyone.I'm working in a 4 layer pcb with ENIG surface finish, first time I use ENIG (qfn components).I have some small circular pads for post-assembly testing, and I wonder if it's better to leave the pad with/without stencil opening for solder paste application.If the pad is not covered with solder, will it affect the reliability of the track? (due to oxidation, corrosion...). I think gold is stable, but reading the black pad issues with ENIG makes me wonder if that is correct.If the pad is covered, could the flux residue affect the conductivity between the probe and the pad?. If it does I can have false test-fails, but will be preferred over reliability issuesWhich option would you recommend? (for leaded no-clean solder paste).Thanks!!!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 25, 2014, 11:45:33 pm
content: Definitely no paste on an ENIG test pad. The whole point of gold is a long-lasting finish.Also the soft solder may cause sharp test probes to stick, or leave solder residues in the probe.

author: colotron
author_rank: Contributor
timestamp: January 26, 2014, 12:05:38 am
content: Excellent, thank you very much Mike!!!
anyone have try Amtech FreshMix ? - Page 1
Forum section: electronics / general

author: Alphatronique
author_rank: Regular Contributor
timestamp: October 08, 2013, 06:17:40 pm
content: Hianyone have try amtech FreshMix past kit ?http://www.amtechinc.com/pdf/TDS_FreshMix.pdfseem to good to be true so must have a counterpart of trick some wereand not hear that anyone on hobby or small market use it ?

author: Alphatronique
author_rank: Regular Contributor
timestamp: October 22, 2013, 02:39:45 pm
content: Hii buy one of the kit for try it myself , just receive itfirst 2.5Kg of solder was really a lot of solder on come on that kitpersonally i prefer 250gram jar but kit was 500gram jarprice was good bit under 400$ usd so 40$/250 gram (internet price for 250g jar was ~50$)for now my only concern is that must handle solder bag carefully for avoid to punch itsince air will oxide ball and put it useless (bad was vacuum + inert gas)will try it in the following week time to deplete my current jarp.s. i forgot that for fresh past overnight shipping most of time cost more that the past itselfbut that kit require only ground shipping

author: Alphatronique
author_rank: Regular Contributor
timestamp: October 29, 2013, 08:25:47 pm
content: Hii mix my first cup of past , first 2/3 was easy to mixbut last 1/3 was more it like mix by concrete by hand ..but was it doable in 5 min as amtech said ..will try it in production in next 2-3 day

author: alank2
author_rank: Super Contributor
timestamp: October 29, 2013, 09:03:22 pm
content: Thanks for posting this info - looking forward to hearing about your results.

author: Alphatronique
author_rank: Regular Contributor
timestamp: October 29, 2013, 09:22:13 pm
content: Hiok schedule changed so i use it now ..all look good i take some macro pic of past print/release and uniformity ..more to come ..

author: Alphatronique
author_rank: Regular Contributor
timestamp: October 30, 2013, 09:54:34 pm
content: Hihave work with it for last 2 day and all was fineand i learn today from a specialist that SAC305(LF-4300) not mix well whit SN100Cbut Whit EING it really rockseem that freshmix was now my favorite past .. and solve the shipping issuei look back on my old invoice and normal LF4300 was 50$ Jar + 80$ shipping +45$ UPS dutyif some one have any question fell free to askBest regard
Aligni parts system- has anybody used that? - Page 1
Forum section: electronics / general

author: reagle
author_rank: Unknown
timestamp: October 17, 2013, 05:55:18 pm
content: Stumbled on their site and it looks very nice:http://www.aligni.com.Any first hand user experience? This is for a commercial use, paid account.Thanks in advance

author: lgbeno
author_rank: Frequent Contributor
timestamp: October 17, 2013, 06:30:05 pm
content: http://www.aligni.com/open-aligni/

author: reagle
author_rank: Unknown
timestamp: October 17, 2013, 08:27:20 pm
content: That one is not for commercial use
Cheap stick-on membrane label switches? - Page 1
Forum section: electronics / general

author: reagle
author_rank: Unknown
timestamp: October 01, 2013, 05:44:22 pm
content: Does anybody know of a manufacturer offering membrane buttons as a standard products?Looking for a one or two buttons label with membrane switches inside and a pigtail coming out.

author: Bored@Work
author_rank: Super Contributor
timestamp: October 01, 2013, 06:03:45 pm
content: Quote from: reagle on October 01, 2013, 05:44:22 pmFor a one-off: Ebay e.g.eBay auction: #321057626969

author: reagle
author_rank: Unknown
timestamp: October 01, 2013, 06:52:53 pm
content: That's one option I guess! We'd need them in a bit of a volume though

author: Bored@Work
author_rank: Super Contributor
timestamp: October 01, 2013, 07:23:42 pm
content: Volume? The usual way is to get them custom made.
New Memory switch/casing & PCB manufacturing services - Page 1
Forum section: electronics / general

author: Atifplus
author_rank: Newbie
timestamp: August 21, 2013, 03:28:07 pm
content: Hi everyone.I am based out of Canada and started a business to provide PCB manufacturing service.We are new in the industry (4 months) and eager to help and provide services to new clients.Please feel to contact for any questions or quotes.Site underconstruction: botechcircuits.comLink to ebay store can be accessed from the site.

author: ovnr
author_rank: Frequent Contributor
timestamp: August 21, 2013, 03:39:42 pm
content: So... you offer essentially the same PCB service as Seeed and Itead, but at a significantly higher cost ($26 vs $10 for 10pcs 5x5cm)? Probably using the same factory they use, given the packaging and specs?... That's not very impressive.As for the membrane switch service, any pricing examples? For custom setups (obviously), in low quantity. I'm vaguely interested.

author: Atifplus
author_rank: Newbie
timestamp: August 21, 2013, 04:32:27 pm
content: Ovnr,There are other factors that are ignored such as quality of service and quality of work.I admit price at seeed and itead is cheaper.I will not be able to beat those prices.However I am offering services and ensuring quality work.If you are interested in membrance switch/graphic overlay etc. please provide the coraldraw file and I will be able to quote based on the design.If cheaper price is the highest priority then you are right there are other alternates i.e itead. etc.

author: ovnr
author_rank: Frequent Contributor
timestamp: August 21, 2013, 04:43:32 pm
content: Re: PCB pricing - that's well and good, there are plenty of places more expensive than your service too!Membrane: Assume the same layout and size as the one listed on your eBay store (4x3 12-key), but with custom labels. I don't currently have a drawing for you to quote off of, because the current design is using tactile switches instead (and I would like to swap them out for something cheaper).Also... coreldraw, lol.

author: free_electron
author_rank: Super Contributor
timestamp: August 21, 2013, 06:11:06 pm
content: wherever i click it's 'under construction' .... not good ...

author: free_electron
author_rank: Super Contributor
timestamp: August 21, 2013, 06:12:36 pm
content: Quote from: ovnr on August 21, 2013, 04:43:32 pmNothing to laugh about. For membrane keybord work you need vector graphics. It's either Coreldraw or Illustrator. Like it or not, the industry doesn't care... their way or the highway...
Are mechanical tape feeders interchangleble? - Page 1
Forum section: electronics / general

author: Rundstedt
author_rank: Contributor
timestamp: July 24, 2013, 10:38:00 am
content: Well my company recently bought small used smt line (to be more accurate just Screen printer, p&p and reflow oven).Our current machine park: MPM AP Excel Screen printer, Juki Ke-2020L, Speedline Electrovert Omniflex 7 reflow oven. And even thou I didn't even turn it on my manager found on auction service some oldPanasonic line, and I've been asked whether mechanical feeders can be used in our ke-2020L. And truth to be told I don't know even where to look for such information.So can anyone help me, or even point a direction where to find such information?And bonus round question, I've been offered 2 self tensioning frame for my screen printer LTC Quattro-flex II and Cookson Electronics Alpha tetra with the first one 300eur more expensive. Can anyone advise me which one is better?

author: EEVblog
author_rank: Unknown
timestamp: July 24, 2013, 11:10:26 am
content: I'm pretty sure that there is no standard, they are all custom and proprietary, that's how they lock you in and suck more money out of you.

author: Rundstedt
author_rank: Contributor
timestamp: July 24, 2013, 01:54:38 pm
content: Unfortunately I was expecting that. At least we could use those conveyors. Nonetheless thank for confirmation.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 24, 2013, 02:02:41 pm
content: Feeders are usually specific to the machine manufacturer, but tend to stay the same between machines by that manufacturer. I think there are a few 'equivalents' where comapnies have been taken over so machines that appear to be from different manufacturers are actually just different vintages of the same line.
Anyone recommend a good SMD rework company near Auckland? - Page 1
Forum section: electronics / general

author: deephaven
author_rank: Frequent Contributor
timestamp: July 08, 2013, 03:24:36 pm
content: I have a bit of kit gone down in Auckland. My customer has identified as a bad connection on a QFP208 package and wants to send it back to UK for fixing. That seems like an awful long way for a small rework job, so I wondered if anyone could recommend a good company which could do this small job? If not Auckland, somewhere in NZ?
. - Page 1
Forum section: electronics / general

author: 8086
author_rank: Super Contributor
timestamp: June 30, 2013, 09:46:37 pm
content: .

author: gregariz
author_rank: Frequent Contributor
timestamp: July 01, 2013, 11:45:28 pm
content: Quote from: 8086 on June 30, 2013, 09:46:37 pmgood stuff... congratulations

author: sci4me
author_rank: Regular Contributor
timestamp: July 05, 2013, 12:21:11 am
content: Im glad I found this! I plan to use this whenever I make my next PCB.
Where to buy full reel - Page 1
Forum section: electronics / general

author: John80
author_rank: Contributor
timestamp: July 02, 2013, 04:07:14 pm
content: Hello!!!I am searching for a cheap source for capacitors and/or resistors full reels (normal 5000pcs) of 0603 size. Except from the regular distributors like Farnell, RS, DigiKey etc have you got anything better in mind like any good surplus shop?I can see that eBay is an "interesting" place for full reels for about $10 for common values but both of my last two orders the reel damaged at the shipping process.

author: AndyC_772
author_rank: Super Contributor
timestamp: July 02, 2013, 08:39:39 pm
content: Full reels? Go straight to the big distributors: Arrow, EBV, Avnet, Future, Rutronik. You don't say where you are, but here in the UK I'd probably start by calling up Flint Distribution.

author: rolycat
author_rank: Super Contributor
timestamp: July 02, 2013, 09:50:33 pm
content: If you are in the UK and just need a few reels, Rapid Electronics have resistors at pretty good prices.TruOhm 1% 0603 are £3.76 per reel of 5000, inc VAT.They also do capacitors, for example £17.74 for a reel of 10nF 4000 X7r 0603 ceramics.

author: Psi
author_rank: Super Contributor
timestamp: July 02, 2013, 11:44:15 pm
content: You can get 5000 reels from digikey for US$3.90eghttp://www.digikey.com/product-detail/en/RC1608J100CS/1276-5014-2-ND/3965321

author: John80
author_rank: Contributor
timestamp: July 03, 2013, 10:22:18 am
content: Thanks for your answers!My main source was Farnell but the reels there are expensive having in mind what you have already suggested.DigiKey is always the best source for components in general but the prices to import them in Europe (including VATs and import taxes) are getting higher and higher every month!
Component Drop Rate - Page 1
Forum section: electronics / general

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: August 09, 2012, 02:50:47 am
content: Hi guys,I had my first batch factory assembled boards in the last 2 weeks.I'm wondering what kinda rate is normal for components being drop during the pick and place process.I find it rather annoying whenever the components is in a full reel, it drops a lot like 100-200 pieces.But, whenever I marginally gives extra, it drop very little.Dave, in the 1st round of uCurrent boards assembly by machine, do you drop a lot of components?I just want to get a feel on how much of wastage to expect in the next round and can be done to reduce this.

author: TommyGunn
author_rank: Contributor
timestamp: June 27, 2013, 03:45:13 am
content: I know this is a bit late, but if you are still looking for an answer... It really depends on the type of part and how many are used per run.100-200 pieces dropped would only be reasonable for small (0805 or less) cheap components on an previously used reel. New reels have extra empty tape on them to facilitate the installation of the tape into the tape feeder. If you have a reel with small expensive components it can sometimes be worked around by using some special tape and precise workIn my experience spillage from the machine dropping parts is around 0.1% on the high side.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 28, 2013, 10:48:28 am
content: Quote from: 48X24X48X on August 09, 2012, 02:50:47 amThat's because if there are a lot of spares, the assembler will take more time to minimise losses - e.g. better tuning of vision etc., and if there are few, they may have hand placed some previously dropped/vision-rejected parts.There will sometimes be some 'problem' parts that are more prone to issues - e.g. inductors, which often have nonuniform solder on the bottom that can cause vision rejects.All the assembler cares about is getting the job out the door - using more of your free-issued parts is not his problem.
Elecrow now allows panelization - Page 1
Forum section: electronics / general

author: poorchava
author_rank: Super Contributor
timestamp: June 18, 2013, 08:38:05 am
content: Hi, I just found out that Elecrow now allows panelization of PCBs on 10x5 and larger formats. As far as I understand the separation method is v-groove only right now. It's an interesting option nonetheless.http://www.elecrow.com/services-c-73/pcb-fabricate-service-c-73_116/2-layer-10cm-10cm-max-pcb-510pcs-color-free-p-328.htmlhttp://www.elecrow.com/blog/?p=496
Cam350 and NC data. - Page 1
Forum section: electronics / general

author: kizzap
author_rank: Unknown
timestamp: June 14, 2013, 04:13:44 am
content: Hey allI'm having some trouble exporting the NC data with CAM350 and exporting the NC data correctly.What I am trying to do is have a single pcb design stepped through a full panel that I can get Fabricated. The issue arises when I try load the NC file into a gerber viewer (GerberLogix in this case) it throws up some errors saying that the code is not supported with stuff like M25, M01, then a whole lot of M02s with the X and Y steps as needed. As I understand (from Googling) that M25 is Pattern Start, M01 is Pattern end, and the M02s are just the steps as to where the pattern starts from. What I am worried about though is that if it isnt looking correct in GerberLogix, is it probable that the NC data is wrong? or is it more likely that GerberLogix can't handle the pattern Step and repeat?If anyone has any insight to this, can you please leave a comment?ThanksKieran

author: jahonen
author_rank: Super Contributor
timestamp: June 14, 2013, 08:17:22 am
content: Haven't actually tried NC drill step & repeat function with CAM350. Are you trying to panelize your design? I'd just simply copy the design manually to correct places in the panel (but if you have the panel editor option, there may be more convenient way available) and then just export gerbers and nc drill data just as it would be a single PCB.Regards,Janne

author: kizzap
author_rank: Unknown
timestamp: June 14, 2013, 09:32:10 am
content: AHA!!! Found it!!For some reason under the step and repeat option it has an option for using SR( no idea what it means, but it uses the M02 Codes, etc) and deselecting it has made it work properly.@jahonen That was going to be my next plan, however at 150 boards(very small boards) per panel, I would have lost my mind.-kizzapEDIT: damn, now I just have to work out why the compensation on the tool isnt working right...EDITEDIT:: BOOM GOT IT!!!

author: free_electron
author_rank: Super Contributor
timestamp: June 14, 2013, 01:57:18 pm
content: I wouldnt trust gerberlogix as far as i can throw it....Solid gerber processors : Genesis Frontline , Ucam , Valor and Cam350.The rest ? All flawed in one aspect or another.
Recommendation for EU/UK high technology HDI board and assembly provider? - Page 1
Forum section: electronics / general

author: hugov
author_rank: Newbie
timestamp: May 06, 2013, 11:08:36 am
content: Hi all,I'm working on a small (~35mm square), very high density board (currently 8 layers with 82 micron track/space, lasered blind microvias top->mid1 and mid2, buried drilled vias mid1 to mid6) with many wlCSP and BGA parts down to 0.4mm pitch, i.e. much like a smartphone PCB :-)Can anyone recommend a manufacturing partner, preferably in the UK or EU. The board is currently just for a industrial research project with no current plans for high volume manufacture.Thanks,hugov

author: free_electron
author_rank: Super Contributor
timestamp: May 06, 2013, 01:40:47 pm
content: ACB in dendermonde ( belgium). They can do stuff like that without blinking.

author: poorchava
author_rank: Super Contributor
timestamp: May 06, 2013, 01:42:09 pm
content: Wuerth Elektronik in Germany:http://www.we-online.com

author: hugov
author_rank: Newbie
timestamp: May 06, 2013, 02:07:49 pm
content: Thanks poorchava & free_electron!Have you used these companies previously for an advanced board?

author: poorchava
author_rank: Super Contributor
timestamp: May 13, 2013, 10:15:45 am
content: My company uses Wuerth regularly for prototype runs. Not exactly HDI, but other demanding specifications (safety-critical heavy automotive stuff with blind/buried vias, metal cores, ceramics, CSP's etc). We received some samples of their HDI stuff and they look very nice.Sorry, I can't post any photos.
LCD Bezel Suppliers - Page 1
Forum section: electronics / general

author: grunto
author_rank: Newbie
timestamp: April 28, 2013, 10:22:28 am
content: I am after a bezel for a 16 x 2 LCD (the stock standard LCDs you can get of eBay etc). The bezel I am looking for is something along the line of the one shown in this thread (reply #7):https://www.eevblog.com/forum/manufacture/manufacturing-an-instrument-have-a-couple-of-questions/msg110240/#msg110240I have found some that seem to be the right size but they are overseas and of course postage is really high for what might be the wrong one. I can't for the life of me work out the Digikey sizes.They are for a final (4th) year electrical engineering project and I am after a couple (2 - 3) of them initially so I can try out some different layouts.Does anyone know where I can get some in Australia - I have tried Jaycar, Altronics & Rockby Element14 have some that *might* be the right size but they are $20 - $30 which seems a bit high.

author: mickpah
author_rank: Regular Contributor
timestamp: April 29, 2013, 06:26:08 am
content: Hi,I totally share your frustration, in the end I gave up and used an enclosure with a window as I couldn't find anything that looked decent in Australia.http://www.aliexpress.com/item/Wall-mounting-plastic-enclosure-210-139-58mm/593638239.htmlAs I needed quite a few the unit cost came down but at least you get an enclosure for the price of just a bezelI used a winstar oled not a lcd, but that should work toohttp://www.winstar.com.tw/products_detail_ov.php?lang=en&ProID=272.The finished project is athttp://www.yetihacks.com/2013/03/the-arduino-motherboard.htmlhope this helps.

author: grunto
author_rank: Newbie
timestamp: April 29, 2013, 10:40:10 am
content: It would be good to go to something like the case you have selected in the long term but in the short term anything that looks half decent would be sufficient. The oled you used is the same dimensions as the lcd so it is a possibility but once again the one off cost is expensive when postage is factored in.On your site under the arduino "bundy" clock you seem to have a bezel that is similar to the one I am after - do you recall where you obtained it from?http://www.yetihacks.com/2013/03/a-practical-arduino-time-clock-access.html

author: mickpah
author_rank: Regular Contributor
timestamp: April 29, 2013, 11:51:08 am
content: Sorry this isn,t going to help you muchI picked up one of thesehttp://www.jaycar.com.au/productView.asp?ID=QP5588in a seconds bin stripped out the led a hacked It to fit for the prototype . Try eBay you maybe able to do the same but it is hit and miss without being able to examine it for suitability first
BatchPCB turns to OSHPark - Page 1
Forum section: electronics / general

author: kizzap
author_rank: Unknown
timestamp: April 20, 2013, 03:58:14 am
content: So...I just found out that BatchPCB is closing it's doors, and is now moving all of its customers over to OSHpark. Good or bad for the industry do you think? I can already see there being a whole lot of projects with purple PCBs now...

author: c4757p
author_rank: Super Contributor
timestamp: April 20, 2013, 04:11:10 am
content: Wait - I thought this was old news.Quote from: kizzap on April 20, 2013, 03:58:14 am

author: gxti
author_rank: Frequent Contributor
timestamp: April 20, 2013, 04:31:04 am
content: You will not be disappointed unless you really hate purple. OSH Park PCBs are higher quality in every respect -- tolerances, finish, and material.

author: MacAttak
author_rank: Unknown
timestamp: April 20, 2013, 04:41:03 am
content: Agree. The OSHPark boards come out well and I don't think the price was much different.Also, I have to say the deep purple and gold sure is pretty. Maybe that has something to do with me growing up in southern Louisiana?

author: kizzap
author_rank: Unknown
timestamp: April 20, 2013, 05:03:47 am
content: Did a little detective work (read as I read the date of the post about it on the OSHpark site) and it was only posted the 18th. (so effectively the 19th in Oz.)and a plus is that they now have free international shipping.....

author: marshallh
author_rank: Unknown
timestamp: April 20, 2013, 06:25:47 am
content: BatchPCB has been a raw deal for a long time, I'm surprised they never closed up shop sooner.You will be hapy with oshpark's boards, very soon the specs on the 4layer order will get even better. 0.8mm pitch bga anybody

author: poorchava
author_rank: Super Contributor
timestamp: April 22, 2013, 06:53:21 am
content: Hm, with free international shipping it may actually become the first source for affordable 4-layer pcbs. At $10/sq.inch a 2"x2" will cost $40 for 3 boards. Elecrow/seed/itead services begin at $45 for 2"x2" (10 boards).Since that many PCB's are often net needed, if turnaround time (from order to arrival) will be lower, I may actually give them a try.Price of 2 layer PCB's is still unattractive. 5$/sq.in. makes $20 for 5cmx5cm and $80 for 10cmx10cm, whereas itead/seed/elecrow do that for $10 and $20 respectively.
Paste flux - Page 1
Forum section: electronics / general

author: ramicio
author_rank: Regular Contributor
timestamp: April 18, 2013, 02:09:26 pm
content: Radio Shack only has paste flux in store, not the pens of the clear liquid. Can I use the thick paste to reflow? I just want to use it on something already soldered to break the surface tension and try to make sure there are no shorts by heating it again.

author: MacAttak
author_rank: Unknown
timestamp: April 18, 2013, 02:23:27 pm
content: You can probably order a pen of fresh high-quality flux and have it shipped 2nd-day more cheaply (or close to it) than the crap they sell at Radio Shack these days. For most tasks, Kester 186 works really well and is a widely recommended brand - and sells briskly enough that you don't have to worry about it being old.

author: ramicio
author_rank: Regular Contributor
timestamp: April 18, 2013, 02:35:04 pm
content: I guess I will just go on eBay and order a pen of that flux from the closest seller. Thanks!

author: nanofrog
author_rank: Super Contributor
timestamp: April 19, 2013, 04:15:50 am
content: You can also get liquid flux in small containers (i.e. MG Chemicals sells rosin flux in 125ml and quart containers), and put it into pens yourself.Refillable Pens (2 pk).http://www.mouser.com/ProductDetail/Chemtronics/CW7000/?qs=sGAEpiMZZMvNdIckKBEZymSxungURxcGQVUERwq7bgs%3dFluxhttp://www.mouser.com/ProductDetail/MG-Chemicals/835-100ML/?qs=%2fha2pyFaduipqzzCukZ5o35Qp8FqqkB6wc%2flCZeM4dI9eYbNQacwAAHMN7wykWNsLp7jxNDXWxA%3dSRA also sells a refillable kit as well (link is rosin, but they also have other formulations if you prefer)http://sra-solder.com/product.php/7048/141/sra_99_20_rma_rosin_flux_pen_with_5_refillsCheaper than buying disposable pens, and still end up with excellent quality supplies.

author: ramicio
author_rank: Regular Contributor
timestamp: April 19, 2013, 04:59:09 pm
content: Thanks for that. I don't do enough of this work to need that much. If by some miracle people started getting interested in the stuff I make then I might need more volume.
Looking for dry film silkscreen and soldermask - Page 1
Forum section: electronics / general

author: Flávio V
author_rank: Regular Contributor
timestamp: April 10, 2013, 09:39:46 pm
content: I am looking for any colour(white, black, etc) of dry film silkscreen...It should be inside europe(no taxes) and from reputable dealer..The reasons i am looking for it is because it is easier to use for DIY producing compared to the liquid ****(or maybe it is because something is not that good) which is being used for now in my college(or school for american equivalent) and they are looking for the dry film silkscreen so well...hehehehehehehe...in December i "got" then to buy .5x10m of green dry film solder mask...And i am also looking for dry film soldermask that is not green for cosmetic reasons...

author: ddavidebor
author_rank: Super Contributor
timestamp: April 10, 2013, 10:01:38 pm
content: Have you heard of a strange things called EBAY?

author: Flávio V
author_rank: Regular Contributor
timestamp: April 11, 2013, 06:32:44 am
content: The films aren't for me, they are for a college so they aren't going to buy from ebay....

author: poorchava
author_rank: Super Contributor
timestamp: April 11, 2013, 09:44:21 am
content: If you want to buy on behalf of a college, then I think you may contact with manufacturer/authorized distributor directly. Google for local distributors of 3M, Henkel, DuPont, MG Chemicals. Most companies, even if they do high volume only will do an exception for educational institutions.And don't tell me that you don't have distributors in Portugal. If we have a bunch of them in Poland, then most definitely they can be found everywhere including North Pole and J.Verne's Mysterious Island O0
Elecrow/iTead soldermask expansion - Page 1
Forum section: electronics / general

author: poorchava
author_rank: Super Contributor
timestamp: June 22, 2013, 04:29:10 pm
content: Hi,what value do you use for solder mask expansion when designing PCB to be manufactured by itead/elecrow/seeed etc?According to design rules, the minimum soldermask bridge is 0.2mm (7.874mil). I know that solder mask expansion is supposed to compensate for soldermask/copper registration errors and soldermask shrinkage. I've set it to 3mil, but I still can't achieve reliable soldermask between pads of 0.635mm pitch SOP package.How low can I go with expansion value without risking some catastrpohic misalignment?
Itead $5 service? - Page 1
Forum section: electronics / general

author: poorchava
author_rank: Super Contributor
timestamp: January 31, 2013, 08:23:04 am
content: Hi guys. Yesterday I've stumbled upon this entry in iteadstudio's bloghttp://blog.iteadstudio.com/ultra-low-cost-pcb-prototyping-start-at-5/#more-483They stated that they would be launching 5pcs service for lower PCB sizes too, with 8/8 feature size and no e-test. This post is from 28th Aug 2011 - quite old - but I couldn't find those services in the online store. Do you have any idea if this service went 'live' and if not, then why? I would really be interested in that, because I need 2-3pcs most of the time, so 10pcs in most cases provides my friends with fancy beer coasters

author: DavidDLC
author_rank: Frequent Contributor
timestamp: January 31, 2013, 08:41:48 am
content: These are the current prices:http://imall.iteadstudio.com/open-pcb/pcb-prototyping.html

author: DavidDLC
author_rank: Frequent Contributor
timestamp: January 31, 2013, 08:42:35 am
content: I was waiting for that service, but never saw it coming.
Looking for a turnkey PCB assembly service - Page 1
Forum section: electronics / general

author: War Lord
author_rank: Newbie
timestamp: November 27, 2012, 11:52:16 am
content: HiyaThis is my first post but been lurking and watching Dave's videos for a whileAs the title states, I have a design of a microprocessor controlled changeover and I'm looking for a good turnkey service that won't cost me all the electronics in JapanI would prefer a Chinese/Hong Kong based dealer because they're cheaper?cheers guys

author: Arvind
author_rank: Newbie
timestamp: December 11, 2012, 06:42:25 pm
content: Hi,We have EMS manufacturer in India that can handle low/medium volume business. The manufacturer is more than 30 years old companyand we have been using there services for last 10 years. We are based in US. If you can let me know more about what you are looking for, we can probably help here.RegardsArvind Patil201 331 8338

author: notsob
author_rank: Frequent Contributor
timestamp: January 21, 2013, 06:44:58 am
content: AND please change your profile so that we know where you are.

author: Bharath
author_rank: Newbie
timestamp: January 21, 2013, 07:31:47 am
content: Profile as in how??

author: notsob
author_rank: Frequent Contributor
timestamp: January 21, 2013, 07:36:38 am
content: Near top of page - 3 across from 'HOME' is profile,click, then --> 'forum profile' , click, then location, please select your country

author: Bharath
author_rank: Newbie
timestamp: January 21, 2013, 07:52:41 am
content: Thanks a lot... Duin it rite away...

author: Bharath
author_rank: Newbie
timestamp: January 21, 2013, 07:58:54 am
content: Will you be able to help me out by letting me know about nyone who is looking for the services we offer???
PCBCart Reorders (tooling costs and updating the copper layers) - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: December 03, 2012, 07:22:20 am
content: Has anyone on here done a reorder from pcbcart and changed some of their copper layers?I want to do a reorder with a new top and bottom copper layer and their website isn't too specific as to what you can/cant do without paying the tooling costs again.There's a drop down box where you can specify- Reorder and nothing changed- Reorder and update copper layer- Reorder and update silkscreen layerBut i'm not sure if that includes all copper layers or just one.So before i try to get answers from them over email i thought id ask on here in case some of you have done update reorders before.
Madell DP2006-2 Pick and Place machine - Page 1
Forum section: electronics / general

author: mhanley
author_rank: Newbie
timestamp: November 23, 2012, 05:34:09 pm
content: Hi,Has anyone had any experience with the Madell DP2006-2 Pick and Place machine. It's a low cost unit with the ability also place paste on the PCB pads.Any comments or alternative machines in the sub $10k would help.Thanks
Tube/probe enclosure for sensors - Page 1
Forum section: electronics / general

author: Spekkio
author_rank: Regular Contributor
timestamp: July 27, 2012, 02:25:04 pm
content: Hi!How do I find tube shaped enclosure for sensors, or do I have to get someone to make custom made enclosures for that?I'm looking for something similar to thishttp://i01.i.aliimg.com/img/pb/424/409/374/374409424_138.jpgBut I've seen lots of different tube shaped/probe sensors with good enclosures that could work for my sensor, but never found an empty enclosure for sale anywhere.

author: Jon Chandler
author_rank: Frequent Contributor
timestamp: July 27, 2012, 04:00:34 pm
content: Would a large felt-tip marker body work for you?

author: Spekkio
author_rank: Regular Contributor
timestamp: July 30, 2012, 09:51:38 am
content: Hmm, that is not a bad ideaThat would work for a prototype actuallyThanks alot for that idea.But I think I need to produce some more later, I found a company nearby that could make them.

author: mamalala
author_rank: Unknown
timestamp: August 03, 2012, 02:53:06 pm
content: Enclosure for a probe?There you go:http://www.teko.co.uk/en/prodotti/famiglia/AC/serie/29They have a big range of enclosures. They are connected to OKW:http://www.okw.co.uk/(Serpac and Rolec as well, check the links at the bottom left of the OKW page). Contact them, they will probably send you a sample as well.Greetings,Chris

author: jakeypoo
author_rank: Regular Contributor
timestamp: October 24, 2012, 06:35:02 pm
content: What kind of sensor is it?If you are looking for something for a temperature probe, you may be looking for a thermowell?http://www.amazonsupply.com/s/ref=sp_search?guess=true&Action=submit&keywords=thermowell
different color silkscreen - Page 1
Forum section: electronics / general

author: riktw
author_rank: Contributor
timestamp: October 21, 2013, 03:25:42 pm
content: Hello,I saw the PCB of the Mojo FPGA board on adafruit and what immediately got my attention was the black PCB with green silkscreen.It really looks wonderful and I would like to know if there are PCB manufacturers who can make this?http://www.adafruit.com/products/1553Best regards,Rik

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 21, 2013, 03:33:15 pm
content: Most manufacturers will do any colour combination you want, but there may be a 1-off cost, and possibly a minimum if they need to get a special ink in.

author: KJDS
author_rank: Super Contributor
timestamp: October 21, 2013, 04:46:45 pm
content: I used to use different coloured solder resist when I had two very similar boards on a production line at the same time. When the only difference in the boards is a couple of different resistor values it made for easy identification. Most board manufacturers can offer a range of options, but unless you are buying a lot it will cost.

author: kizzap
author_rank: Unknown
timestamp: October 22, 2013, 12:27:18 am
content: Last time I used a custom colour PCB I used goldenphoenix to get a panel made. Decent quality, and isn't all that expensive. Lead time wasn't too bad either.-kizzap
PCB wire strain relief - Page 1
Forum section: electronics / general

author: Mikey
author_rank: Regular Contributor
timestamp: August 26, 2012, 04:10:21 pm
content: (This was origianlly posted in "Electronics » Projects, Designs, and Technical Stuf", but this category might be more suited for it?)Hello, I am working on a new end-stop switch for my 3D printer (heavily modified reprap prusa), and the first version I made had 3 pin through hole headers, but I would like to get rid of those and solder the wires directly onto the board instead to keep it smaller and more clean to look at, and also have less things sticking out from it to make it as small as possible.I attached a picture of my current idea, but it might not be all pcb houses that are able to make those inner slots in the pcb to loop the 3 wire ribbon cable through.Anyone here got an idea to what good alternatives there are?EDIT:this is my first pcb, so be gentle

author: PedroDiogo
author_rank: Regular Contributor
timestamp: August 26, 2012, 04:30:20 pm
content: Normally the pads are quite fragile and can very easily be lifted from the board if you pull the wires by accident. Why not use the through hole pads? You already have slots to pass the wires so the dimensions will be virtually the same.The slots are a good idea. I think most PCB manufacturers wont have any problems with them. You could also use 3 separate holes, one for each wire if you want to have them separate and secure.

author: Mikey
author_rank: Regular Contributor
timestamp: August 26, 2012, 04:37:26 pm
content: Quote from: PedroDiogo on August 26, 2012, 04:30:20 pmI chose the pads to keep it all on one side. This pcb will be screwed onto a clamp that will hold it to the printer, and that clamp will be right behind where the wires would go through. So if I could keep it all on one side of the board, that problem would be gone, and I don't think the more fragile pads will be a problem, that is why I wanted some strain relief on the cable.3 seperate holes are also a good idea, but I would then have to split the to allow them to go through the holes. And I would like it to come out from the board still joined, but if they cant/wont make the slots, then I might have to do the seperate holes anyways.

author: Mikey
author_rank: Regular Contributor
timestamp: August 28, 2012, 09:46:10 am
content: Just got reply from iTead, they can make this
Prototype design, pcb, and assembly service. - Page 1
Forum section: electronics / general

author: flodins
author_rank: Contributor
timestamp: July 27, 2012, 09:49:42 am
content: Hi,I can provide design by your idea, small batches of PCBs(ie. up to 100 small pcbs) and prototypes assembly(Including smd like 0402) for hobbyists who do not have the ability to make this on their own.I will produce for everyone worldwide.Quality of my work can be seen here:https://www.eevblog.com/forum/manufacturing-assembly/my-way-to-professional-prototype-at-home/or on my websitehttp://translate.google.pl/translate?sl=pl&tl=en&js=n&prev=_t&hl=pl&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.flodins.info&act=urlassembly sample:

author: russdx
author_rank: Newbie
timestamp: August 06, 2012, 01:21:32 pm
content: have you got a rough price guide?

author: hinabuttpk
author_rank: Newbie
timestamp: August 31, 2012, 04:00:05 pm
content: PCB assembly services really play very vital role they also assembly SMT and electronic products manufacturing services, they also provide printed circuit board design. PCB services can list down main products. Electronic contract manufacturing
How are vias manufactured? - Page 1
Forum section: electronics / general

author: atwoz
author_rank: Regular Contributor
timestamp: August 18, 2012, 03:02:23 pm
content: Hello, I have been searching Google and can't find any info on how vias are created on a PCB when manufacturing. I 'm really curious on how they do it. Does anyone know?

author: AndyC_772
author_rank: Super Contributor
timestamp: August 18, 2012, 03:52:35 pm
content: Drill hole, electro-plate with copper.

author: nanofrog
author_rank: Super Contributor
timestamp: August 18, 2012, 10:35:05 pm
content: They drill the hole, use conductive ink inside the hole, then electroplate a copper.There are also copper and brass rivets made for this that might be more usable/easier at home vs. electroplating (no additional chemistry to deal with anyway) . Examples:http://www.ebay.com/sch/i.html?_nkw=pcb+rivet

author: mariush
author_rank: Super Contributor
timestamp: August 18, 2012, 11:24:09 pm
content: See this:http://www.eurocircuits.com/index.php/making-a-pcb-eductional-moviesIn particular from "Drilling the PCB" and onwards... each section has a dedicated page with a video showing the actual process, very easy to understand.

author: atwoz
author_rank: Regular Contributor
timestamp: August 19, 2012, 12:01:32 am
content: Thank you so much guys, everything is clear now!
PCB Parts requests  Datasheet? - Page 1
Forum section: electronics / general

author: gscsxys
author_rank: Newbie
timestamp: August 02, 2012, 09:32:02 am
content: PCB Parts requests Datasheet?

author: chrome
author_rank: Regular Contributor
timestamp: August 04, 2012, 09:39:38 pm
content: The fuck are you talking about?
What is this : "sulfuric acid paper" ??? (taobao) - Page 1
Forum section: electronics / general

author: sorin
author_rank: Frequent Contributor
timestamp: July 22, 2012, 10:31:09 am
content: http://item.taobao.com/item.htm?id=9446976067http://translate.google.com/translate?sl=auto&tl=en&u=http%3A%2F%2Fitem.taobao.com%2Fitem.htm%3Fspm%3D2013.1.0.142%26id%3D9446976067

author: SeanB
author_rank: Super Contributor
timestamp: July 22, 2012, 11:32:18 am
content: I think they mean acid free paper......... Chinglish at it's best.

author: niki19851123
author_rank: Newbie
timestamp: July 25, 2012, 02:08:35 am
content: Quote from: sorin on July 22, 2012, 10:31:09 am

author: sorin
author_rank: Frequent Contributor
timestamp: July 25, 2012, 05:26:59 am
content: If is english I can search in the Net by myself, and no need to post here!!!

author: hlavac
author_rank: Frequent Contributor
timestamp: July 31, 2012, 08:50:34 am
content: I think that means Tracing paper. Immersing paper in sulfuric acid makes it semi transparent, that is how tracing paper is made.I use tracing paper to print pcb patterns for photo transfer - toner sticks to it much better than the PET transparencies I was using before.

author: westfw
author_rank: Super Contributor
timestamp: July 31, 2012, 10:35:14 pm
content: http://en.wikipedia.org/wiki/Tracing_paper(and I thought it was due to Alkali processing, but that seems to be more of a true (skin-based) vellum thing.)
prototron PCB house - Page 1
Forum section: electronics / general

author: richcj10
author_rank: Unknown
timestamp: July 09, 2012, 05:15:31 pm
content: Has anyone used this company before?ThanksRick

author: nikizppcb
author_rank: Newbie
timestamp: July 12, 2012, 08:05:46 am
content: did your means want find a pcb company do prototron?

author: richcj10
author_rank: Unknown
timestamp: July 16, 2012, 01:46:45 pm
content: No, I was wondering if anyone here ever used this company before..... (Prototron....)

author: Architect_1077
author_rank: Regular Contributor
timestamp: July 16, 2012, 01:54:50 pm
content: Quote from: nikizppcb on July 12, 2012, 08:05:46 amWhat?

author: metalphreak
author_rank: Frequent Contributor
timestamp: July 19, 2012, 09:07:33 am
content: http://www.prototron.com/A link is always handy

author: slateraptor
author_rank: Frequent Contributor
timestamp: July 20, 2012, 03:25:32 am
content: I'm curious as well. Judging by their quote system, I'm confident their pricing won't be hobbyist friendly.
does any one offer a prototype assembly service in the uk? - Page 1
Forum section: electronics / general

author: russdx
author_rank: Newbie
timestamp: July 17, 2012, 06:16:07 pm
content: i just need 1 prototype board assembled, i have the pcbs and parts but need them assembled.(i have tried a few times my self but spend more time working out if my assembly is crappy or the design lol)can any one here assemble smd pcb boards(x2 0.5mm / mostly 0603s)thanks

author: 8086
author_rank: Super Contributor
timestamp: July 17, 2012, 06:41:19 pm
content: Hi there! I guess you just sent a quote request to my website,http://www.circuitology.com. You should have my response now.Cheers, Simon

author: russdx
author_rank: Newbie
timestamp: July 17, 2012, 09:46:07 pm
content: yes bud quote seams very reasonableim still waiting for the pcbs to turn up, the second they do i will send you my address for invoicehow long does assembly take?thanks

author: Stephen Hill
author_rank: Regular Contributor
timestamp: July 18, 2012, 11:32:52 am
content: What is the smallest resistor and IC package the you can handle? I assume you can handle 0603, SOT-23's and SSOP packages?

author: 8086
author_rank: Super Contributor
timestamp: July 18, 2012, 02:03:56 pm
content: Quote from: russdx on July 17, 2012, 09:46:07 pmI quote 10 days usually, but for a one-off it should be quicker.Quote from: Stephen Hill on July 18, 2012, 11:32:52 amAbsolutely. The smallest I will consider is 0402, and 0.4mm pin pitch - though each quote is assessed individually. I will consider small BGAs also but they are done at the customers own risk.-Simon
Gerbv not slowing slots - Page 1
Forum section: electronics / general

author: Dagon
author_rank: Regular Contributor
timestamp: June 15, 2012, 05:04:02 pm
content: I normally use Gerbv to check my gerbers before sending them off. However I haven't had boards with any slots before and it's just showing them as normal holes.Diptrace's export preview and kicads gerber viewer show them just fine so I assume it's a Gerbv thing but I thought I'd check on the off chance there's something whacky about the drill file. Anybody know if Gerbv should handle slots?

author: Short Circuit
author_rank: Frequent Contributor
timestamp: June 15, 2012, 05:09:23 pm
content: ViewMasterEZ shows the three slots, so the NC file seems fine.

author: Dagon
author_rank: Regular Contributor
timestamp: June 15, 2012, 05:21:10 pm
content: Yeah, thought it might have just been Gerbv, thanks for checking.
Home made pcb drill station - Page 1
Forum section: electronics / general

author: IanJ
author_rank: Unknown
timestamp: June 13, 2012, 06:52:13 pm
content: Hi all,I had an old motor, plastic motor housing and an old Clarke drill press........so after shimming up the clearance on the press to get rid of all unnecessary lateral movement, cutting it down to size, weakening the spring.........I've ended up with this.It's obviously not as finger tip nice as my old Oryx drill, but I hope the idea inspires others that there are ways to keep things cheap.Ian.

author: DavidDLC
author_rank: Frequent Contributor
timestamp: June 13, 2012, 07:05:26 pm
content: Nice work.The only thing that looks old is the motor, the other stuff looks like new !

author: IanJ
author_rank: Unknown
timestamp: June 14, 2012, 06:42:02 am
content: Quote from: DavidDLC on June 13, 2012, 07:05:26 pmThe press is definitely old (albeit clean looking).......had to weld up some cracks before it could be used.....not so easy seeing as how it's metal cast. Not strong enough for it's proper use, but fine for PCB's.Ian.

author: Jimmy
author_rank: Regular Contributor
timestamp: June 14, 2012, 10:57:47 pm
content: It looks great Ian however if I were doing it I would put an air cylinder on it and a foot operated valve. Actually I think I might build one maybe.