hybridfree/eevblog-posts huggingface dataset:
Solder oxidation in high relative humidity - Page 1
Forum section: electronics / general

author: Rutherberg
author_rank: Regular Contributor
timestamp: November 06, 2016, 08:02:58 pm
content: Hi,I have to install an electro-mechanical project in a church, where there is high relative humidity. Principle : 5v commands connected to a command unit, that activate solenoid valves essentially.I'm worried about solder oxidation, and obviously by reliability. I would like to use Sn60PbCu2 solder, is it a problem regarding oxidation ?Is there special solder type for high relative humidity environment ? I thought about electronic varnish but it is far from ideal.Thanks in advance !

author: IconicPCB
author_rank: Super Contributor
timestamp: November 06, 2016, 09:12:56 pm
content: If humididty is a problem use conformal coating on the entire PCB assembly.Typically a spray pack or a dip/brush on compound.

author: Rutherberg
author_rank: Regular Contributor
timestamp: November 06, 2016, 10:10:57 pm
content: Ok Thanks,It is essentially solder joints on big solder terminals.Quote from: IconicPCB on November 06, 2016, 09:12:56 pmExactly, I don't know if it is a problem, that's what I try to know. Solder joints have to be reliable for decades, I mean atleast25-30 years in these conditions.Is it realistic with leaded solder and no conformal coating ?I searched on google for a while, and according to blueskull, it should not be a problem...
Stip Feeder for Pick and Place Machines - Page 1
Forum section: electronics / general

author: JohnSL
author_rank: Regular Contributor
timestamp: October 25, 2016, 06:36:51 am
content: I've started to work on a design for holding strips in place in DIY pick and place machines. I originally started this project over in the OpenPnP forum as a 3D printed project, which I recently published on YouMagine. Then Juha, the designer of the Liteplacer, asked if I could make an injection-molded version. The goal is to have a way to hold down strips of tape (of various widths and thicknesses) at a uniform height. In other words, the top of the tape should be at the same height no matter how thick the tape. I'd love to get feedback and input on the design as I go along. The goal is the make them available for sale from Liteplacer, and to keep the price low. You can find more information here:http://liteplacer.com/phpBB/viewtopic.php?f=11&t=399Thanks,-- John

author: l0wside
author_rank: Regular Contributor
timestamp: October 25, 2016, 12:16:41 pm
content: I would be grateful to get hold of some of these parts. Fiddling cut tape into a real feeder is a PITA (at least with my machine), and 24mm tapes are a real challenge as my machine currently has only 8, 12, and 16mm.Unlike others, I would be glad to have a magnetic holder. Maybe you can include them as an option?

author: harry4516
author_rank: Regular Contributor
timestamp: October 25, 2016, 03:11:23 pm
content: nice work !I did a very similar thing compared with the pictures in your link.This worked well with R and Cs in paper strips, but did not workwith plastic strips (i.e. diodes).If you remove the cover tape from the plastic strip then the lightest vibration causes the parts jumping in all directions.The only solution I found is to fix the strip with adhesive tape to a massive body. This solves most of the "part jumping" disaster.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 26, 2016, 12:22:59 am
content: how about motor mechanism to advance the reel automatic?
Wave solder 3mm brass nut to underside of PCB? - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: October 24, 2016, 10:29:00 am
content: I have a board that takes a toroid laying down flat and a plastic disc with a hole in the centre and a steel bolt holds it down on the board. To assemble it a nut is manually held in place under the board while the bolt is screwed up. I was thinking how well would it work to put a steel bolt though the board with the brass nut underneath (no toroid fitted) and hope that the wave solders the brass nut but doesn't stick to the steel bolt. Would this work reliably? The toroid is mounted after the wave soldering step.

author: ovnr
author_rank: Frequent Contributor
timestamp: October 24, 2016, 10:38:48 am
content: I'd consider a PEM nut instead. Also, be sure to use a stainless steel bolt if you try it; solder is much less likely to stick to that.

author: Fraser
author_rank: Super Contributor
timestamp: October 24, 2016, 10:39:58 am
content: I can only state what I have seen in such a scenario. Not a soldered nut, but a 'nut' with a protruding splined 'sleeve' that is pressed into the chassis plate or, in your case, the PCB. I forget the correct name of these press fit 'nuts' but someone on here will know for sure.There is a lot of thermal load to solder a nut using wave soldering and the thread may become filled with solder. There is also the small matter of holding the nut in place during wave soldering.Fraser

author: Fraser
author_rank: Super Contributor
timestamp: October 24, 2016, 10:45:04 am
content: They are just called press fit inserts.See here for an examplehttp://www.rotaloc.com/products/pa_inserts.htmlFraser

author: Fraser
author_rank: Super Contributor
timestamp: October 24, 2016, 10:48:28 am
content: Or self clenching nuts.......http://www.allmetalssupply.com/product/fastener-nut-thin-sheet-self-clinching-press-fit/Fraser

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 24, 2016, 10:58:54 am
content: MAC8 make a whole load of thread inserts designed for PCB mounting. They also do some in tape & reel for SMD assemblyhttp://www.mac8usa.com/threaded-insert-TH-lev2.php

author: exmadscientist
author_rank: Frequent Contributor
timestamp: October 24, 2016, 03:32:23 pm
content: Würth have a similar lineup, helpfully available at Digi-Key:http://katalog.we-online.com/en/em/browse/assembly/spacer_studs_&_round_spacers_1. They're not cheap, in terms of per-unit costs, but anything that saves assembly time and eliminates opportunities for mistakes usually pays for itself.
Motorized soldering tip cleaners - Page 1
Forum section: electronics / general

author: jjoonathan
author_rank: Frequent Contributor
timestamp: October 09, 2016, 08:35:03 pm
content: I recently got the chance to use a JBC CLMB motorized tip cleaner at work. It was a lovely experience in comparison to brass wool, doing a better job in a fraction of the time. I decided to look for an off-brand alternative for home use since the cheapest JBC model, the CLMS, is $330. Cheap for JBC, perhaps, but expensive for sporadic hobby use. To my surprise, I haven't been able to find any off-brand alternatives. I hope that the problem is with my search skills rather than because somehow JBC is the only one to think of this. Do any of you know the magic term? Are there special chinese characters I can paste into taobao to find these things? Or is my choice really "JBC or DIY"?Thanks,Jon

author: jjoonathan
author_rank: Frequent Contributor
timestamp: October 09, 2016, 08:46:15 pm
content: Not 10 minutes after I post and I get a banner ad for a Hakko Tip Polisher, FT-700. Searching for "Tip Polisher" brings up many more results. For once in my life I'm glad that I don't adblock. Thread closed, I guess, unless anyone has experiences that they want to share with different models of these?

author: Monkeh
author_rank: Super Contributor
timestamp: October 09, 2016, 10:06:04 pm
content: I just want to say how astonishing it is that 'tip polisher' comes up with safe results on an image search.

author: jjoonathan
author_rank: Frequent Contributor
timestamp: October 09, 2016, 10:39:22 pm
content: Yeah, no kidding, when the targeted adverspysing gets the wrong idea about what you're interested in it can really make your life miserable, even on sites you would expect to opt out ofthatkind of ad.In any case, I decided to try the Aoyue 128. The plastic construction doesn't look terribly confidence inspiring but the generally positive reviews and the fact that it has tip holding slots on the sides sold me.Let the record show that I cannot wait to stick my soldering iron in my new tip polisher.* straight face *

author: keethrax
author_rank: Contributor
timestamp: October 12, 2016, 06:29:40 pm
content: Yep. Trying to figure out how to do some typesetting in LaTeX made for some interesting search results for at least a month.

author: helius
author_rank: Super Contributor
timestamp: October 12, 2016, 07:45:38 pm
content: Quote from: jjoonathan on October 09, 2016, 08:46:15 pmNo direct experience, but Hakko has a new version, the FT-710. The difference is that it has a sealed collar instead of being open on top, so solder dust doesn't get flung into the air. Hakko recommends them for restoring oxidized tips as well, together with their FS-100 tip cleaning paste.

author: peter.mitchell
author_rank: Super Contributor
timestamp: October 15, 2016, 10:34:52 am
content: i highly suggest you get the non-metallic brushes for them, they destroy tips real quick if you dont.
Small run of flex circuits with tight clearance (0.4mm BGA) - Page 1
Forum section: electronics / general

author: dingari
author_rank: Contributor
timestamp: October 25, 2016, 09:41:39 am
content: I'm looking to manufacture a small run (~10 units) of flex boards. I've previously used Seeed Studio for my PCBs, and while they've been good so far, their design constraints are not suitable for the application anymore.The board is roughly 14 x 40 mm, with two bend points. Four layers would be optimal, but we could probably make it work with two. The design has 1-2 0.4mm pitch BGA chips, so trace width and clearance needs to be tight.Do you have any experience of a fab that could do this?

author: l0wside
author_rank: Regular Contributor
timestamp: October 25, 2016, 11:07:26 am
content: With 0.4mm BGA and more than two rows, you will almost definitely need an HDI PCB to get it routed.Try WE Direkt (https://www.wedirekt.com/en/), but do not expect it to be cheap.

author: dingari
author_rank: Contributor
timestamp: October 25, 2016, 11:34:16 am
content: Quote from: l0wside on October 25, 2016, 11:07:26 amThat's what I expected. I will probably try to avoid the BGAs for prototyping.

author: dingari
author_rank: Contributor
timestamp: October 26, 2016, 09:43:22 am
content: What about four-layer boards (regular spacing e.g. 4-6 mil)? What are my options there?
implementing new manufacturing capabilities and processes - Page 1
Forum section: electronics / general

author: mongobit
author_rank: Contributor
timestamp: October 12, 2016, 12:38:57 am
content: As I have previously posted I am working to expand my companies electronics test, troubleshoot, and repair capability. I have roughly 10 years of experience working as a board and systems level test and troubleshoot technician. This has all been with me stepping into processes, policies, and procedures built and implemented by others. I have the knowledge and skills to work with, test, troubleshoot, repair and or rebuild boards and systems but I am having a hard time translating that school of hard knocks, clouds of magic smoke, burned fingertips and digging in and fixing faults that had the engineers scratching their heads acquired knowledge into polished policy documents I can feed to the paperwork gods to make things happen. To be clear electronics manufacturing is not the companies primary focus but it is working its way in. It is also done within other divisions of this company but they are at full capacity and are loathe to take on more work/responsibility to support our site thus my eagerness to get our own facilities up and running. Those other divisions do have some policies that I have partially looked over and could adapt and implement at our site but i do not have full access to those files and am having to reinvent the wheel in some instances.What I am looking for are books and reference docs that i can use to start building the framework so I can paint a picture for my boss for what I want us to be able to do at our site(implementing IPC standards, complying with our ISO9100 requirements, explaining the effects of ESD to coworkers so they start treating the boards properly and have documentation to back me up when i get told I'm full of it. ) and how that meshes with his goals.Boss is technical (he has his BS in EE) but has spent his career working at the systems level and rarely ever gets down to the component level Plus for the last 10 years he has been management with all of its technical prowess destroying drudgery.. The last time we troubleshot a board together it was ugly (I'm talking me repeatedly explaining the difference between the schematic symbol for an opto-isolator and an OP-AMP ugly).oh great Learned denizens of the EEVblog Forum i beseech thee. help point me in the right direction!!!
Dimensioning enclosure cutout - Page 1
Forum section: electronics / general

author: Allse
author_rank: Newbie
timestamp: September 29, 2016, 09:54:02 am
content: Hello, I need to design the right size cutout for a DIN connector. There is a diagram in the datasheet (attached). Someone please tell me what size hole should I design, is it 18mm? I am not familiar with the meaning of +0.1 in the superscript or -0.1 subscript next to the dimensions and don't want to design it incorrectly as I want to have a tightly sealed connector.

author: pix3l
author_rank: Regular Contributor
timestamp: September 29, 2016, 09:58:59 am
content: The +0.1mm is the tolerance. So the size can be anywhere between 18.0 and 18.1 mm. Similarly if a radius is 2.5mm -0.1 it can be anywhere between 2.4 and 2.5 mm

author: Allse
author_rank: Newbie
timestamp: September 29, 2016, 03:40:32 pm
content: Thank you for explaining this.
Microscope mount - Page 1
Forum section: electronics / general

author: Koen
author_rank: Frequent Contributor
timestamp: September 24, 2016, 09:30:56 am
content: Hello,I've read the previous posts on trinocular microscopes and will probably go for an Amscope-related product. Yet, I haven't seen much about the mount and would like your opinion : is a convenient "arm" stable enough or is a "double boom" a must ?Background : I already own a cheap stereo microscope for soldering touchups but the working distance is too small and, wearing glasses, a display would help for quick inspection.Thank you, Koen

author: jpanhalt
author_rank: Super Contributor
timestamp: September 24, 2016, 11:09:44 am
content: Is there a question here?Wide-field eyepieces, which are often marked WF, can be used while wearing glasses. If you do get some sort of digital viewer be sure to get one that has minimal lag time. The lag time may not seem like much from the specification, but it can make driving a microscope using the viewer quite difficult.John

author: Koen
author_rank: Frequent Contributor
timestamp: September 24, 2016, 11:14:03 am
content: Yes, the main question is :Quote from: Koen on September 24, 2016, 09:30:56 am

author: jpanhalt
author_rank: Super Contributor
timestamp: September 24, 2016, 11:27:30 am
content: Yes, an arm CAN be stable enough. We routinely used 10-headed scopes on arms for teaching. Question is whether the specific product you are considering is stable enough. That can't be answered in the abstract.

author: Psi
author_rank: Super Contributor
timestamp: September 24, 2016, 11:38:19 am
content: My vote is for the 2nd one (i have this one)That first one will likely wobble around and make the image go out of focus all the time.

author: ebclr
author_rank: Super Contributor
timestamp: September 28, 2016, 02:12:30 am
content: I wold prefer the second one .In fact I'm in the process of buying the AmScope SE400X
Small quantity prototype PCB production - Page 1
Forum section: electronics / general

author: tyguy2
author_rank: Unknown
timestamp: May 20, 2016, 01:30:10 am
content: Hello. I'm trying to locate a place near Miami, Florida (at least somewhere in the south East United States) that can produce small runs (like 1-5) of PCB's. Does anyone know of a place that would do that? All that I've found have minimum order quantities of +100. Thanks.

author: rea5245
author_rank: Frequent Contributor
timestamp: May 20, 2016, 01:37:07 am
content: I've found a few American companies that offer small runs, but the ones that I know of are not in the southeast.Why do you want a local manufacturer? If it's to build a close relationship with them, I'm not sure any company would do that for such a small order. If it's that you're hoping for faster delivery, there are companies that will ship overnight. Even from China, you can pay for 3 day delivery.- Bob

author: tyguy2
author_rank: Unknown
timestamp: May 20, 2016, 01:43:46 am
content: Could you give me the names of a few of these companies?

author: rea5245
author_rank: Frequent Contributor
timestamp: May 20, 2016, 01:55:14 am
content: I've found Accutrace, Advanced Circuits, AP Circuits (Canada, not the US), Bay Area Circuits, Bittele (Canada), ExpressPCB, Omni Circuit Boards (Canada), OSH Park, and Sunstone.I runPCBShopper.comwhich is a price-comparison site for PCB manufacturing and assembly. You enter your board's specs and quantity and it shows you prices and delivery times from over two dozen manufacturers. I sell ads on the site, but my "editorial content" (the price comparison calculator) is completely neutral: companies do not pay to be included in the list and the ranking is by price.- Bob

author: tyguy2
author_rank: Unknown
timestamp: May 20, 2016, 02:34:03 am
content: Thanks!

author: pcbfox
author_rank: Newbie
timestamp: June 07, 2016, 03:48:27 pm
content: Same as Bob said , why not try to find some other factories not local . for example Chinese factory , maybe I can support you with the small prototype pcbs ,no limites on quanity.

author: technotronix
author_rank: Regular Contributor
timestamp: September 30, 2016, 02:53:56 pm
content: We can help you to provide your small volume of quality pcb prototype to production within 24 hours to 3 days as per your requirement.
Laser cutting services - Page 1
Forum section: electronics / general

author: krivx
author_rank: Frequent Contributor
timestamp: August 26, 2016, 09:19:10 am
content: I need some jigs made from acrylic sheet. Itead and Seeed used to advertise a laser cutting service but both seem to have disappeared, is there a cheap alternative? I don't mind waiting a week or two if the cost is good. Ideally I would like the OSHPark-style experience - I make a drawing, upload it, get pricing an the parts turn up in the post.

author: tszaboo
author_rank: Super Contributor
timestamp: August 26, 2016, 09:54:09 am
content: Elecrow still has it. I've only ordered PCBs from them, they were OK ish, with the Chinese PCB standards.

author: krivx
author_rank: Frequent Contributor
timestamp: August 26, 2016, 12:44:07 pm
content: So they do! Thank you.

author: sparkswillfly
author_rank: Contributor
timestamp: August 27, 2016, 02:04:44 am
content: Pololu? Dangerous prototypes?

author: Gary.M
author_rank: Regular Contributor
timestamp: August 27, 2016, 04:33:06 am
content: https://www.ponoko.com/

author: SKPang
author_rank: Unknown
timestamp: August 27, 2016, 08:44:15 pm
content: I've got a laser cutter. PM me for a quote.Max size 600 x 400 mm

author: technotronix
author_rank: Regular Contributor
timestamp: September 21, 2016, 06:42:39 am
content: Many other china pcb manufacturer also provide same service. Check them.
Any cheap option to let assemble just one pcb  - Page 1
Forum section: electronics / general

author: Miyuki
author_rank: Frequent Contributor
timestamp: September 09, 2016, 11:17:39 am
content: Hi I want to ask if anyone have experience with similar problemOrdering a cheap pcb is not a problem even if I use just one piece and throw away other pieces price is still nicebut what about projects where I have to use BGA packages (as lot of modern chips don't have leaded alternative)Is here any cheap manufacturer with assembly service that can send me just one assembled board (and other bare or can throw them away) ?And when I mean cheap a mean really cheap like few 10s of $ not hundreds

author: janekm
author_rank: Unknown
timestamp: September 09, 2016, 11:31:36 am
content: Not really if you're talking 10s of $.If you think about it, that kind of money is not even worth it for the amount of communication it takes to establish what needs to be assembled and how. The beauty of PCB manufacturing is that the gerber files package has become so standard that you can just "throw it across the fence" and get back what you need most of the time without any back&forth communication.Even the cheaper assembly workshops in China tend to have an effective minimum charge somewhere around 650RMB (for simpler projects) which is already around $100.

author: forrestc
author_rank: Unknown
timestamp: September 10, 2016, 08:05:03 am
content: Quote from: Miyuki on September 09, 2016, 11:17:39 amLet me answer your question a different way:There are quite a few products out there to permit you to reliably place a BGA package through inexpensive reflow methods. I.E. a cheap toaster oven.. The one I have seen demonstrated in the StencilQuik BGA rework stencils. Seehttp://www.instructables.com/id/Reworkng-a-BGA-Using-a-Stay-in-Place-Stencil/as an example of how to use these... Once you have the bga down, you should be able to reflow them in any oven capable of reflowing normal solder paste.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 10, 2016, 08:07:43 am
content: Befriend someone who has the equipment. Bribe them with beer, or beer money (or whatever equivalent thereof motivates them).Or do it yourself. Or pay a whole lot more for a professional service.Tim

author: elecman14
author_rank: Unknown
timestamp: September 16, 2016, 03:35:01 pm
content: I would look athttps://macrofab.com/for what you are trying to do. They will source your parts and then send you a completed PCBA. There are others around as well that do the same thing.

author: technotronix
author_rank: Regular Contributor
timestamp: September 20, 2016, 01:42:20 pm
content: Try with china PCB manufacturer. May be they can provide you pcb assembly within your budget.
Cheapest 4 layer pcb with ~5 day turn? - Page 1
Forum section: electronics / general

author: jakej
author_rank: Newbie
timestamp: September 16, 2016, 08:53:06 pm
content: I enjoy OSHPark's 4 layer service, but I'm looking for something a little faster (shipment to CA, USA).

author: rea5245
author_rank: Frequent Contributor
timestamp: September 16, 2016, 08:55:46 pm
content: UsePCBShopper.com. It's a price comparison site for printed circuit boards. You enter your board's specs and it shows you prices and delivery times from over two dozen PCB manufacturers, including the best known companies in Asia, North America, and Europe.Disclosure: I run the site.- Bob

author: mrpackethead
author_rank: Super Contributor
timestamp: September 17, 2016, 12:40:21 am
content: pcbway. you will struggle to beat them

author: jakej
author_rank: Newbie
timestamp: September 17, 2016, 08:08:36 pm
content: A great help - thanks!

author: jakej
author_rank: Newbie
timestamp: September 17, 2016, 09:04:38 pm
content: Ended up choosing 2 day service fromhttps://www.pcbzone.netwhich I found via PCBShopper (PCBSHOPPER coupon code -$7.78) and got a 18mm x 48mm 4 layer board 6mil/6mil trace/space and 10mil vias for $89.06 shipped to USA. Nice

author: mrpackethead
author_rank: Super Contributor
timestamp: September 18, 2016, 09:09:01 am
content: That is quite remarkable.. I'm going to have a look at that, paritcually given that they are based in New Zealand..

author: technotronix
author_rank: Regular Contributor
timestamp: September 20, 2016, 05:06:18 am
content: I would go with PCBway.
Recommendations for cheapish rigid flex pcb prototyping - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: September 07, 2016, 10:13:49 pm
content: HiDoes anyone have recommendations for a place that can do cheap rigid-flex prototyping.I know rigid-flex and cheap don't usually go together but still.Do any of the cheap pcb fabs in china offer rigid flex that you know of?I don't need production quality, just some prototypes and the design is static flex (no dynamic bending)

author: l0wside
author_rank: Regular Contributor
timestamp: September 08, 2016, 12:44:05 pm
content: Itead has flexible PCBs at reasonable prices (USD 85). They might do rigid-flex as well.Max

author: technotronix
author_rank: Regular Contributor
timestamp: September 09, 2016, 07:05:46 am
content: I would recommend below:http://www.technotronix.us/flex-rigid-flex-technology.html

author: Thea-zfpcba
author_rank: Newbie
timestamp: September 14, 2016, 03:06:27 am
content: I recommended:http://en.zfpcba.com/

author: Psi
author_rank: Super Contributor
timestamp: September 15, 2016, 06:20:44 am
content: Thanks guys!Will check them all out

author: Ice-Tea
author_rank: Super Contributor
timestamp: September 15, 2016, 06:22:47 am
content: You can also consider semi-rigid flex. Quite a bit cheaper. Doesn't bend as well, surely doesn't bend as often but perhaps for your proto...

author: Psi
author_rank: Super Contributor
timestamp: September 18, 2016, 02:25:42 am
content: do you have a URL for semi-rigid flex, i've not seen/heard of this before

author: Ice-Tea
author_rank: Super Contributor
timestamp: September 18, 2016, 05:46:09 am
content: http://www.eurocircuits.com/blog/192-SEMI-FLEX-pool
amscope todays deal  - Page 1
Forum section: electronics / general

author: ebclr
author_rank: Super Contributor
timestamp: October 11, 2016, 11:16:22 am
content: http://www.amscope.com/todays-deals/20x-stereo-binocular-microscope-boom-arm-light-1.html

author: zapta
author_rank: Super Contributor
timestamp: October 11, 2016, 01:22:38 pm
content: Fixed 20X magnification is too much for SMD work.

author: DerekG
author_rank: Frequent Contributor
timestamp: October 11, 2016, 09:54:14 pm
content: Quote from: zapta on October 11, 2016, 01:22:38 pmYes, perhaps this is why they are on special. 10X would be nice & even 6X for much SMD work is satisfactory.

author: jpanhalt
author_rank: Super Contributor
timestamp: October 11, 2016, 10:14:18 pm
content: The 2X objective is fine. It is mostly the objective that determines resolution. The oculars (10X) define the total magnification and 10X is very common for such optics, perhaps the most common.The working distance and field of view (determined by the objective) are the most important metrics.John
Semi-OT:  Product Packaging - Page 1
Forum section: electronics / general

author: forrestc
author_rank: Unknown
timestamp: September 10, 2016, 08:20:58 am
content: I continue to struggle with what one would expect to be a relatively easy non-technical (but related to manufacturing and assembly) issue....Today, I ship products in bubble wrap. Not very professional. I'd rather switch to just a simple box. Something lightweight and more importantly inexpensive. Materials-wise I'd envision either paperboard or very thin cardboard (F or thinner for sure). The enclosures these are in are fairly robust so really I just need something thick enough to store on a shelf and at some point in the future survive a fulfillment center (think Amazon). I also want something which seems like a product box and not a shipping container....Every place I've looked stateside is scarily priced. I also haven't found anywhere stateside with stock boxes that will work for me - think 1.75" thick, by 6" x 4" or thereabouts at the largest, and around 1" x 4" x4" for the smaller ones. Typically either they are too small or giant....So far cheap boxes seem to only come from China, with very expensive shipping quotes. (We're talking a thousand boxes or so here, so air shipping is unreasonable, but trying to find a supplier to ship this small of a order via sea isn't really an option). I know that somewhere there's a supplier or two which is easy to work with and has prices which are beyond reasonable, ideally either domestic US or somewhere with inexpensive shipping options for a pallet of boxes to the states. I'm hoping someone on here has run into this and knows of a supplier.

author: sparkswillfly
author_rank: Contributor
timestamp: September 11, 2016, 03:54:07 am
content: Bakery/candy boxes can work:http://www.efavormart.com/4x4x2cakebox-100pc-silver.aspx

author: forrestc
author_rank: Unknown
timestamp: September 12, 2016, 07:53:22 am
content: Quote from: sparkswillfly on September 11, 2016, 03:54:07 amI actually also found this vendor:https://soopak.com/Prices are at least tolerable, and they're on the right continent.

author: DTJ
author_rank: Super Contributor
timestamp: September 12, 2016, 08:19:09 am
content: I'm in a similar predicament.Have you looked at clam shell packaging?http://www.southpack.com/wp-content/uploads/2014/01/clamshell-packaging.jpg

author: forrestc
author_rank: Unknown
timestamp: September 12, 2016, 11:20:55 am
content: Quote from: DTJ on September 12, 2016, 08:19:09 amI looked at clamshells a couple of years back. I don't remember why I ended up not going down that path though....The vague recollection I have was something about not being able to find a size which worked in stock, and minimums for customs were scary. Things have changed though recently with the whole 3d printable molds thing, so maybe I need to go down that path again as well.
production programming device - Page 1
Forum section: electronics / general

author: Morgoroth
author_rank: Regular Contributor
timestamp: August 28, 2016, 07:08:25 pm
content: Hi guys, I have a question, I'm working with a snapdragon processor and the standard procedure to program the device is though USB connector and the setup of few pins of processor, however we want to know if there is a better way to get the devices programmed from factory that don't involve USB connector, maybe some free pins on board, we are totally newbies on production matter.Thanks in advance,JP

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 28, 2016, 07:33:59 pm
content: Yes. Contact your supplier. They can get you pre-programmed parts.Tim

author: Morgoroth
author_rank: Regular Contributor
timestamp: August 28, 2016, 08:35:48 pm
content: Quote from: T3sl4co1l on August 28, 2016, 07:33:59 pmthanks !!

author: sparkswillfly
author_rank: Contributor
timestamp: August 28, 2016, 09:52:45 pm
content: Chips can be programmed before they are placed on the board by automatic machines likeor after the board is reflowed by test/programming fixtures using pogo pins.

author: varghese
author_rank: Newbie
timestamp: August 29, 2016, 07:38:56 am
content: I have worked on Automated Test equipment ,I dont know about snapdragon processor, but for normal micro controllers we use JTAG for programming & testing ..Boards usually mounted on a bed of nail (pogo pin), infact while designing the board, we make sure that all the I/O pins are accessible to pogo pin .. (DFT)

author: l0wside
author_rank: Regular Contributor
timestamp: August 29, 2016, 01:50:17 pm
content: Depending on volume and number of variants, pre-programmed parts might be the best solution.Otherwise, use pogo pins and test pads on your board. USB should also work if routed via these pins instead of a regular connector, provided the wire impedance is not too far off.Max

author: Morgoroth
author_rank: Regular Contributor
timestamp: August 29, 2016, 04:02:04 pm
content: Thanks for all the answers, I think we gonna ask for preprogrammed flash memories or programming by USB, probably Qualcomm have something to say, we already ask them and we are waiting for response, any news I'll post here.thanks guys,JP

author: zapta
author_rank: Super Contributor
timestamp: August 29, 2016, 04:48:28 pm
content: Since distributors also provide custom programming, e.g.http://www.digikey.com/videos/en/v/Custom-Programming/1719519252001Make sure you can also program the assembled boards in case something went wrong.

author: KL27x
author_rank: Super Contributor
timestamp: August 31, 2016, 10:08:59 pm
content: I'm curious how much cost does pre-programming add to your ICs? And is it affordable if you need to send them back for re-programming (still in the original packaging?)Anyone with experience on this?

author: Jeroen3
author_rank: Super Contributor
timestamp: September 01, 2016, 09:07:36 am
content: You will need to test the USB connector at some point though.
IEC60332 for looms - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: August 27, 2016, 05:55:23 pm
content: As part of a product I'm developing for a customer I will be supplying the wiring harness. I have been asked that is harnessed be made to IEC60332 which seems to primarily dictate the materials I use but does it have any bearing on who makes the harness? Does the harness maker need to be approved for a standard or is it something that simply dictates the standards of the materials used to make the harness. I basically trying to work out if I need to sort this out to a full-blown harness house or if I can make myself with the help of somebody who I would love to give a little bit of work to.
Cadence PCB Designed--How to view the function of PCB from the back - Page 1
Forum section: electronics / general

author: nail10
author_rank: Newbie
timestamp: July 01, 2016, 06:36:06 am
content: Softerware AD10,Has the function to view the PCB from the back. Where is the set?

author: Yuki Lee
author_rank: Newbie
timestamp: July 08, 2016, 10:45:41 am
content: So say " MIRROR" ?

author: razberik
author_rank: Frequent Contributor
timestamp: July 08, 2016, 11:14:08 am
content: Flip Board - button nearby "3D" button.

author: technotronix
author_rank: Regular Contributor
timestamp: August 18, 2016, 06:31:29 am
content: Flip the view to see the back of the board.
Solder down PCB module pads - Page 1
Forum section: electronics / general

author: Harvs
author_rank: Super Contributor
timestamp: July 10, 2016, 08:57:07 pm
content: The answer might be obvious, but what's the correct way to put the pads along the edges of a PCB to make a solder down module?For example on something like a Bluetooth modulehttp://au.mouser.com/ProductDetail/Silicon-Labs-Bluegiga/WT41-A-AI4Are they a row of normal PTH drilled pads, which the outside is then routed out? Some seem to have the plating past the hole area on the sides which indicates something else.I'm assuming (or maybe hoping?) this is something that any of the board makers will do and it's not a extra process step...If it makes any difference I'm using Altium.

author: Koen
author_rank: Frequent Contributor
timestamp: July 10, 2016, 09:58:35 pm
content: Look up "castellated holes", it's an extra step/cost.

author: m98
author_rank: Frequent Contributor
timestamp: July 10, 2016, 10:03:27 pm
content: Usually its done just the way as you described. Some PCB fabs want an extra fee to do them, but there's no difference in the data.

author: Harvs
author_rank: Super Contributor
timestamp: July 10, 2016, 11:42:40 pm
content: Thanks, I didn't know their real name. Plenty out there now I know the search term.

author: technotronix
author_rank: Regular Contributor
timestamp: August 08, 2016, 06:57:18 am
content: You can use special spring clips for castellated pads and pogo pins.
cheap pick and place - Page 1
Forum section: electronics / general

author: Morgoroth
author_rank: Regular Contributor
timestamp: July 20, 2016, 02:45:46 pm
content: I have to build some prototypes and the pick and place prices are just HUGE, I mean, for 5 PCB USD$8.000 (250 elements), so I was thinking to just solder some components (LGA Package) and that's it, the rest by hand.So please, if anyone have some place were to request a quote without being plucked, please share the tip.Btw, preference in USA given the deliver time.Thanks in advance,JP

author: rea5245
author_rank: Frequent Contributor
timestamp: July 20, 2016, 02:53:06 pm
content: There's a price comparison calculator for PCB assembly atPCBShopper.com. You can enter info about the number of components on your board and it'll give you prices from six different assemblers.Disclosure: I run the site.- Bob

author: Morgoroth
author_rank: Regular Contributor
timestamp: July 20, 2016, 03:45:36 pm
content: hi rea5245, thanks you very very much, you really save my month, great site...JP

author: sparkswillfly
author_rank: Contributor
timestamp: July 21, 2016, 01:58:37 am
content: also macrofab.com

author: Iron Downey
author_rank: Contributor
timestamp: July 21, 2016, 06:54:57 am
content: USD$8 for PCB assembly by machine? That's impossible! I do PCB and PCBA for several years, it always have the minimum consumption for SMT by machine since the the booting fee is there. For your reference, zfpcba is 196usd, pcbcart is 203.2usd, 7pcb is 200.04usd. The quality of PCBA boards by machine is high and it's beautiful. If your project is just a simple prototype and not require high quality, I suggest you solder by hand.

author: ebclr
author_rank: Super Contributor
timestamp: July 21, 2016, 07:28:46 am
content: For prototype you can consider, something like thishttp://vpapanik.blogspot.com.br/2012/11/low-budget-manual-pick-place.html

author: l0wside
author_rank: Regular Contributor
timestamp: July 21, 2016, 08:31:40 am
content: Quote from: Morgoroth on July 20, 2016, 02:45:46 pmDave had an interview with PCBng on The Amp Hour lately. They are located in New York and might suit your needs.Max

author: RobK_NL
author_rank: Frequent Contributor
timestamp: July 21, 2016, 02:19:37 pm
content: @Iron DowneyI think he meant 8000; not a decimal point, but a thousands separator.

author: Morgoroth
author_rank: Regular Contributor
timestamp: July 21, 2016, 06:18:06 pm
content: Quote from: l0wside on July 21, 2016, 08:31:40 amI'll take contact with them, thanks.JP

author: Morgoroth
author_rank: Regular Contributor
timestamp: July 21, 2016, 06:20:14 pm
content: Quote from: RobK_NL on July 21, 2016, 02:19:37 pmIndeed, I should write USD$8000, latin key code use "." instead of "," for thousands separator in my country and sometimes I forgot that.JP

author: technotronix
author_rank: Regular Contributor
timestamp: August 08, 2016, 06:34:12 am
content: Also check withhttp://www.pcbway.com/andhttp://www.technotronix.us/.
Chinese PCB+Parts+PCBA Recommendation? - Page 1
Forum section: electronics / general

author: John_ITIC
author_rank: Frequent Contributor
timestamp: September 02, 2014, 03:16:54 am
content: I'm trying to find a good PCB manufacturer in China. My previous one (http://www.kbt.net.cn/) was cheap but produced warped boards as well as 50% of the boards has loose TQFP leads. Bad boards were then not successfully repaired. I found a new supplier (http://www.Hampoo.com) but they are only a middle-man, has quite high prices and requires high volume. Otherwise they are good.Can anyone recommend one/some of the Chinese manufacturers on the EEVBlog list?http://www.eevblog.com/wiki/index.php?title=PCB_Manufacturers#ChinaIdeally, they will be able to handle complex boards (type, 10 layers, blind vias) but also be able to produce prototype boards. Quality is more important than price (but I don't want to throw money away).Please only respond if you have *actual good experience* with a particular factory. I know how to Google but it is impossible to find which ones are any good.Thanks!/John

author: Erickben
author_rank: Contributor
timestamp: June 29, 2016, 09:00:10 am
content: years passed, any recommendation now, John?I also wanna find one good PCB supplier for my future projects.Quote from: John_ITIC on September 02, 2014, 03:16:54 am

author: Yuki Lee
author_rank: Newbie
timestamp: July 08, 2016, 10:16:37 am
content: wow, it's realy two years ago. you are so eager to know that.Quote from: Erickben on June 29, 2016, 09:00:10 am

author: Spikee
author_rank: Frequent Contributor
timestamp: July 14, 2016, 07:57:09 am
content: I have used smart bes before in shenzhen. You can find them on aliexpress. They source and assemble some well known fpga development boards.There are also many more here. They do small and bigger runs.

author: technotronix
author_rank: Regular Contributor
timestamp: August 04, 2016, 02:22:39 pm
content: Here is one more Chinese PCB manufacture,http://www.pcbway.com/
EasyEDA PCB Manufacturing experiences? - Page 1
Forum section: electronics / general

author: yeah_indeed
author_rank: Contributor
timestamp: July 21, 2016, 12:05:57 pm
content: Hello,I am looking to have a number of large boards (around 490x125mm ~ 19x4.8 in) manufactured and found EasyEDA via pcbshopper.comThe boards have been designed in KiCad, so I'm not looking to use their EDA, but I am interested in their PCB manufacturing.Does anyone have some experience with them? I found a topic from earlier this year but not much info on the actual manufacturing was discussed.Thanks!

author: rea5245
author_rank: Frequent Contributor
timestamp: July 21, 2016, 12:21:57 pm
content: PCBShopper also hosts reviews of manufacturers. You can see reviews of EasyEDA athttp://pcbshopper.com/easyeda-reviews/. Unfortunately, there are only three, and one of them is for EasyEDA's software, not their manufacturing. Still, the two reviews of their manufacturing are positive.Disclosure: I run PCBShopper.- Bob

author: yeah_indeed
author_rank: Contributor
timestamp: July 21, 2016, 01:08:06 pm
content: Hi Bob,Yes, I saw the reviews posted on pcbshopper.com (really great website, thank you!) but as you said not many information has been posted unfortunately.I was hoping someone here might have some experience with their pcb manufacturing.

author: technotronix
author_rank: Regular Contributor
timestamp: August 03, 2016, 06:18:52 am
content: Comparatively they are good, but also just check with other options for your EDA. Get more reviews from the customer who had an experience from them.
Garage style reflow and preheat solutions - Page 1
Forum section: electronics / general

author: Sigmoid
author_rank: Frequent Contributor
timestamp: July 26, 2016, 12:02:33 pm
content: HiAfter reading and watching most of the stuff I could find on hobby reflow ovens, skillets and grills, I'm thinking about getting something like this - both for reflow assembly and for pre-heat for hot air rework. I definitely want to add a pwm relay controller, I might buy the updated version of the one Dave reviewed, but it has gone up in price quite a lot, so maybe I'll just build something with an Arduino, the LCD shield I have around, and open source software.Now the thing is, there is a lot of contradicting information about what's good for reflow. Radiant or conductive heating (people seem to agree that convection is the best, but it's outside my set budget and is harder to control with an external unit), top and bottom or just bottom heat, etc. Dave mentioned in his reflow oven videos that cooldown speed is the biggest problem with home reflow solutions, while in other places people are suggesting placing the board on sand in a pan, or a ceramic floor tile for conductive (and thus more even) heating...What are the experiences here in the forum? How important is the heat-up speed? Is a more powerful heating element always better? Also, my initial thought is that a bottom-heating grill or skillet may be safer because especially for BGA or QFN, you probably want the board under the chip hot first, as opposed to the chip hot first and the pads or ground plane under it heating up through the chip itself...

author: Gary.M
author_rank: Regular Contributor
timestamp: July 26, 2016, 10:02:05 pm
content: I'm in the middle of this right now. You need as much power as you can get within your mains power limitation, probably 2/3 bottom and 1/3 top. Then you need a controller that manages the duty cycle of the elements. I'm using the ControLeo2 and highly recommend it. The guy behind it is very responsive and will answer emails very promptly.Sent from my x600 using Tapatalk
Air conditioner control board reverse service, What rough cost? - Page 1
Forum section: electronics / general

author: Erickben
author_rank: Contributor
timestamp: July 01, 2016, 06:37:38 am
content: Actually I already found a reliable supplier(http://www.raypcb.com/) for my PCB project. We test several samples from them and found quality good. Recently, I did research for my air conditioner control board, found they also has this project, but without any details on their web:http://www.raypcb.com/blog/Air-conditioner-Control-Board/,any one do control board reverse engineering service here? What rough cost? thank you.

author: Ijaz
author_rank: Contributor
timestamp: July 24, 2016, 07:19:26 pm
content: Hi ErickbenA good resolution picture of your control board will help a lot in giving you a price idea. I have been doing it for many years.
UV plastic label printing - Page 1
Forum section: electronics / general

author: tszaboo
author_rank: Super Contributor
timestamp: July 18, 2016, 08:29:03 am
content: Hello! I have a slightly off topic question. Because this will not conduct electrons. have you ever designed or used any printed plastic labels? The ones which are shown below. I would like to put one like this on our enclosure, there would be cutouts for LCD, LEDs, company logo, signs for the connectors, etc. I'm sure it is not rocket science, but the searches return so much unrelated stuff...Did you ever order these kind of stuff? Is there a manufacturer who can do these labels for us with a simple order?Pretty bad image.

author: elecman14
author_rank: Unknown
timestamp: July 18, 2016, 04:31:47 pm
content: Stickers do work well for enclosure labels. I would recommend searching for an industrial die cut sticker supplier. You can usually find suppliers by searching for companies that print bar code stickers and contacting them about your application. You should watch out for ESD generated by peeling the stickers and possibly put them on in an area with a de-ionizing fan depending on what the sticker is covering.

author: tszaboo
author_rank: Super Contributor
timestamp: July 18, 2016, 10:23:07 pm
content: This gave me the idea to look for the membrane switch as the keyword in the search. That is already helpful. Any other input is appreciated.

author: klunkerbus
author_rank: Unknown
timestamp: July 19, 2016, 12:28:40 am
content: Follow blueskull's lead - it's been many years since I dealt with these, but I think the key word to search for is overlay. Search on graphic overlay, or panel overlay, etc.
Solder paste dispenser - Page 1
Forum section: electronics / general

author: ebclr
author_rank: Super Contributor
timestamp: June 01, 2016, 10:16:42 pm
content: I found thishttps://img.alicdn.com/imgextra/i3/812466489/TB2UDICdXXXXXbzXpXXXXXXXXXX-812466489.jpgAnd my imaginations match's this with a nice hand solder paste dispenser, for prototypes.It's reasonable priced at 12 USD.Do you believe this will work ?

author: billfernandez
author_rank: Regular Contributor
timestamp: June 02, 2016, 04:29:01 am
content: It looks like you'd be able to squeeze paste out with that, but can you get a small enough nozzle for it (say 18 gauge)? And it looks kind of big and bulky for SMD work...

author: Capa-Alpha
author_rank: Contributor
timestamp: July 15, 2016, 08:55:10 pm
content: I've used something like this from EFD. It's like a mini-caulking gun. It worked great, especially if you planted your hand on the bench when dispensing while steadying the fine line of solder paste with the other hand while dispensing. For $12 you may as well try it! Make sure you get the syringes as theyre usually optional.