hybridfree/eevblog-posts huggingface dataset:
Need help finding a matching female header for this oddball pitch I've found - Page 1
Forum section: electronics / general

author: troop231
author_rank: Contributor
timestamp: January 17, 2018, 02:15:05 am
content: On a hobby Rx I've torn down, the male terminal strips aren't the standard 2.54mm x 2.54mm pitch square post terminals, but by my measurement are 2.54mm pitch in the X direction, and in the long Y direction, 2.8mm pitch. I have never seen this before, and please trust me when I say it isn't 2.54mm x 2.54mm.I cannot seem to find such an oddball pitch to buy, but I know they are mass produced, so if anyone can help me find this oddball matching female header I would be greatly appreciated! SMT is preferred, but through-hole is okay if it has a pick and place ordering option.The Rx is a Tactic brand receiver. I've torn down a slew of them along with different models, they all use this weird spacing.

author: Andy Watson
author_rank: Super Contributor
timestamp: January 17, 2018, 02:33:37 am
content: Looks very much like 3 x 2.54 standard headers - seven times over in the Y direction - i.e. you have 7 separate connectors. I would guess that the extra 0.26mm is a tolerance allowance to enable easy connection to 3-pin cable tails.

author: Nusa
author_rank: Super Contributor
timestamp: January 17, 2018, 02:35:58 am
content: I don't know, but you should be able to use a bunch of 1x3 female through-holes as an alternative. Shouldn't be too annoying if you're machine-placing them.

author: troop231
author_rank: Contributor
timestamp: January 17, 2018, 03:24:39 am
content: Quote from: Andy Watson on January 17, 2018, 02:33:37 amIt is one single terminal, not three seperate ones.

author: troop231
author_rank: Contributor
timestamp: January 17, 2018, 03:26:47 am
content: Quote from: Nusa on January 17, 2018, 02:35:58 amCan you link me to an Pick and place compatible through hole 1x3 female headers? Samtec doesn't seem to have them with the Pick and place pad option. Thanks!

author: Kean
author_rank: Unknown
timestamp: January 17, 2018, 11:25:31 am
content: I suspect the enlarged spacing is the more easily allow individual servo connectors?GCT offer single row 0.1" headers & sockets packaged as tape & reel with caps.https://gct.co/connector/bg030https://gct.co/connector/bg100Not sure if the T&R version is a standard stock item in 3pos, nor if you could actally place them that close together without the caps interfering.Same issue with SMT version - they're likely to bump into each other during placement if done as 7 individual 1x3 headers/sockets.If you have sufficient volume requirements they may be able to do this 3x7 arrangement as a custom TH item...

author: troop231
author_rank: Contributor
timestamp: January 17, 2018, 05:58:38 pm
content: Quote from: Kean on January 17, 2018, 11:25:31 amWhat about a manufacturer that uses Kapton film as the pick and place 'cap' for 7 individual 1x3 sockets? This stuff is hard for me to find.
Led PCB manufacturer - Page 1
Forum section: electronics / general

author: jg28
author_rank: Newbie
timestamp: January 09, 2018, 07:22:58 pm
content: Hi everybody,I need your help,i want to assemble Osram Led Oslon GF CSSPM1.24-4S2T-1 and i would know if you can give me different good manufacturer PCB(Chinese or others).Another question,is this imperative to assemble in an industrial way?.Because i saw on youtube videos of assembly of led.Thanks in advance for your answers.Bye!

author: mles55
author_rank: Newbie
timestamp: January 15, 2018, 11:08:40 pm
content: Hey jg28, here is a good pcb manufacturer. I found their promotional pricing which seems to be lower than other companies:https://www.pcbnet.com/Quotes/Board/?cpn=3Now, regarding led, here is what they have: "Imagineering is aware that white reflects light much better than any other mask color available, which means even the slightest imperfection in color can lose luminance. But is it enough to ask for a white mask and expect that any fabricator will understand what you are trying to accomplish? At Imagineering we have gone above and beyond to research different white masks to find the most brilliant ones in the market. We found that some white masks go dull during reflow while other white masks go on thin, revealing the copper underneath and making it appear pink."You can read it herehttp://www.pcbnet.com/capabilities/ledHope this helps

author: Yellofriend
author_rank: Regular Contributor
timestamp: January 16, 2018, 04:58:54 am
content: Quote from: mles55 on January 15, 2018, 11:08:40 pmHave you tried Bi solder paste? That has a much lower melting point, 150°C or so, and is specially designed for LED use. Just a random link below, Bi paste is easy to buy.http://uk.farnell.com/edsyn/cr11/solder-paste-58-42-138-deg-10g/dp/2131462
Do you know of a panel mount socket for this power supply plug? - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: January 16, 2018, 10:34:21 am
content: Hello,We are trying to source a panel mount socket into which the plug of the VEL05US120-UK-JA power supply can be pluggedVEL05US120-UK-JA datasheet (farnell2451868)http://uk.farnell.com/xp-power/vel05us120-uk-ja/adaptor-ac-dc-level-vi-12v-0-42a/dp/2451868?ost=2451868&iscrfnonsku=false&ddkey=http%3Aen-GB%2FElement14_United_Kingdom%2Fsearch....the Jack plug is the last page of the datasheet.Do you know of any panel mount sockets for it?

author: Greg Robinson
author_rank: Regular Contributor
timestamp: January 16, 2018, 11:17:23 am
content: A 2.1mm x 5.5mm DC barrel jack? Really? They're only the most common size of barrel jack.You're in the UK, have a look through Cliff UK/Cliff Electronic Components catalogue.

author: Kean
author_rank: Unknown
timestamp: January 16, 2018, 11:44:57 am
content: A very common connector. Some examples from Farnell:http://uk.farnell.com/cliff-electronic-components/fc681473/connector-receptacle-dc-power/dp/2353931http://uk.farnell.com/lumberg/1614-19/dc-power-jack-0-5a-12v-chassis/dp/2646488http://uk.farnell.com/multicomp/jr1819-rohs-psg01769/socket-low-voltage-2-1mm-chassis/dp/1216726
what does this sinus track do ? - Page 1
Forum section: electronics / general

author: GreenHW_GUY
author_rank: Contributor
timestamp: January 15, 2018, 10:23:27 pm
content: the sinus PCB trace come in from 230vac site and the module is a cheap 230vac 50Hz 1A Smps so no fancy HF here. that why I ask what it do then all signal will be converted to DC via Diode and capacitor. see picture

author: Monkeh
author_rank: Super Contributor
timestamp: January 15, 2018, 10:25:08 pm
content: Poor attempt at providing a fuse.Please throw that thing in the bin.

author: GreenHW_GUY
author_rank: Contributor
timestamp: January 15, 2018, 10:40:31 pm
content: I replace it with a real fuse, but with that track with there can run many Amp, so I don't think that was the idea. EMC filter I know it to small Henry to do something.

author: Monkeh
author_rank: Super Contributor
timestamp: January 15, 2018, 10:44:06 pm
content: I said it was a poor attempt.Putting a fuse there won't make that safe - throw it away.
Which modules are the most popular now? - Page 1
Forum section: electronics / general

author: noras
author_rank: Contributor
timestamp: January 29, 2018, 02:25:17 am
content: I want to deploy a number of modules, and then the price is not profitable, promote my own blog

author: noras
author_rank: Contributor
timestamp: January 29, 2018, 02:27:19 am
content: Let others come to me to advertise?Or do you have any suggestions?

author: Merlysys
author_rank: Regular Contributor
timestamp: February 01, 2018, 01:26:00 am
content: What do you mean by module?Give some examples with links.

author: ez24
author_rank: Super Contributor
timestamp: February 01, 2018, 02:00:26 am
content: I would like to see products from Taiwan. "Modules" I would to see are bucks, power supplies, o-scopes (DSO), function generators, arduino related itemsOne "thing" that is hard to find is "quality". It would be good to see someone concentrate on quality parts from Taiwan (if any). There is a "parts" sticky that goes over parts people look for.So far our only connection with Taiwan, deals with NASA grade stuff.
FCC Verification (now called SDoC) using software modelling? - Page 1
Forum section: electronics / general

author: SlowBro
author_rank: Regular Contributor
timestamp: January 15, 2018, 12:12:54 pm
content: Is there software available which can accurately model the unintentional emissions of a new product before it goes to market? I'm new to this game so if this is common knowledge please be gentleI ask because I encountered the following interesting paragraph onthe FCC documentdescribing the forthcoming changes in rules to the product emissions Verification process, now called Supplier's Declaration of Conformity. Do these statements imply that the FCC, the ITIC, the CEA, and Intel are aware of the existence of software that can accurately model unintentional emissions? Or does it simply mean that they are leaving the door open for such software to be developed in the future?QuoteThe language which isnow found in lawis:QuoteAre these "other procedures" software modelling?Onmeasurement procedures, the law states,QuoteCould that be a procedure such as software modelling?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 15, 2018, 12:16:00 pm
content: Yes, absolutely. I've seen Ansoft modeling that can do that.Even if you don't have to ask the price, you still can't afford it.Tim

author: SlowBro
author_rank: Regular Contributor
timestamp: January 15, 2018, 12:23:57 pm
content: Okay that's what I thought. So are you aware of any consultants or firms who own the necessary software who might offer an SDoC analysis of my designs for a fee?Edit: Nevermind. A quick Google of Ansys electromagnetic consultant found several firms. Cool.

author: AndyC_772
author_rank: Super Contributor
timestamp: January 15, 2018, 12:36:33 pm
content: I'm not sure I can see how this would ever work. Most of the EMC failures I've ever been involved with have involved cables. Often it's the details of how they're shielded, connected and terminated which makes all the difference.How do you know what exactly to model? And how would you ever know that the model is accurate without testing a real product?

author: SlowBro
author_rank: Regular Contributor
timestamp: January 15, 2018, 12:41:10 pm
content: Mayhaps it's only useful for a limited number of corner cases? I was readingherethat the FCC cleared Ansys to simulate medical devices. I can see how performing simulations in software and not on a human subject would be desirable.
Sending parts to China for PCB assembly - Page 1
Forum section: electronics / general

author: mmark
author_rank: Contributor
timestamp: January 12, 2018, 04:43:24 am
content: Hi,I have a small side business and make a few PCBs for a friend of mine. Normally the assembly house sources all the parts for me (i.e turn key assembly). The boards are simple (small ARM micro controller, a integrated motor driver, and a few jelly bean components). But this time one of the key components was out of stock everywhere and the factory lead time was 26 weeks .I was able to source the parts in the UK and have them now on my desk in the US. Now I need to ship them to my assembler in China...I looked into FedEx and UPS but am a bit lost with all the details they request, like commercial invoice, certificate of origin etc. Where do I get the certificate of origin from? Do I write it myself? What about tax / custom fees. Do I get an invoice from the shipping company for it or do I have to handle this with the Chinese Customs Office myself? Total value is ~700 US$. My contact recommended to declare less, than 200 US$ to avoid custom troubles, if this good advise?Any tips are appreciated!Thanks,Mark

author: NorthGuy
author_rank: Super Contributor
timestamp: January 12, 2018, 04:59:49 am
content: Since you don't sell the parts, there couldn't be any invoice. As to the country of origin and other custom stuff such as HS codes, simply copy them from documents supplied by the company which sold you the parts.It would be easier if you instructed your supplier to ship directly to your manufacturer.
How to open file between Altium Designer and Circuit Studio - Page 1
Forum section: electronics / general

author: tapasxplore
author_rank: Contributor
timestamp: January 11, 2018, 10:57:02 am
content: Dear all,I am using Altium Designer 17 in my institute, but in my laptop I have circuit studio 1.4. Schematic file made in Altium Designer can be opened in Circuit Studio.Is is possible to open layout file in Circuit Studio, generated by Altium Designer. Is there any conversion software available to convert the files between the two.Regards,

author: voltsandjolts
author_rank: Unknown
timestamp: January 11, 2018, 11:36:18 am
content: In future please use the dedicated AD or CS child boards, thanks.https://www.eevblog.com/forum/circuit-studio/compatibility-between-cs-and-ad-components-and-designs/
Which PCB manufacturer has a white FR4 plate. - Page 1
Forum section: electronics / general

author: blueberry
author_rank: Newbie
timestamp: January 08, 2018, 09:55:36 am
content: Hi everyone,Which PCB manufacturer has a white FR4 plate?PCB plate(fr4) color is white, not PCB solder mask color.Thanks a lot.Blueberry

author: Kean
author_rank: Unknown
timestamp: January 08, 2018, 10:17:22 am
content: See this earlier discussion on the same topic ... and good luck!https://www.eevblog.com/forum/manufacture/not-too-yellow-fr4-material-for-pcbs/

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 08, 2018, 10:43:28 am
content: Coloured FR4 can be made, but it is a special order with significant leadtime and minimum order qty.AFAIK there are no differences in the process, just a case of the PCB house sourcing the material.You won't find a PCB supplier who offers it as standard unless they have some leftover from a previous job, and as it's an unusual requirement this is pretty unlikelyFor small qtys you might find an exotic RF material that may be close to the colour you want, but chances are you'll still have a minimum order qty.If you only want a few square feet, forget it. Not going to happen.If you want a starting point, this company does non-copperclad FR4 in a few colourshttps://www.gaatech.com/fr4-g10-sheet-laminates-epoxyglass/

author: blueberry
author_rank: Newbie
timestamp: January 09, 2018, 02:03:34 am
content: Thank you very much, you helped me solve a big problem, this company does have the white FR4 I need. thanks again

author: Yellofriend
author_rank: Regular Contributor
timestamp: January 16, 2018, 04:25:40 am
content: You need double sided for PTH? If not then use CEM-1 - that can be white. Many makers use TiO2 to get a pure white.Alternately in case you need PTH use CEM-3, cam-3 can be lite in color.http://cipel.it/en/fr-4-and-cem-3.html
Neoden feeder module - Page 1
Forum section: electronics / general

author: Koen
author_rank: Frequent Contributor
timestamp: January 08, 2018, 03:50:54 pm
content: Hello,would any Neoden owner know the total height of their feeder modules ?And similarly, any major issue with them ?I'm considering these for a new project unrelated to a Neoden machine.Pictured here :https://www.aliexpress.com/item/10pcs-8mm-Feeder-for-NeoDen4-Desktop-Pick-and-Place-Machine-Buy-10-get-3-Free/32845020303.htmlThank you very much,Koen

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 08, 2018, 04:01:21 pm
content: Quote from: Koen on January 08, 2018, 03:50:54 pmAFAIK the CAN control protocol hasn't been fully reversed yet, and their tape pull-off seems to have a lot of reported issues. Might do better with something like the Yamaha ones.

author: Koen
author_rank: Frequent Contributor
timestamp: January 08, 2018, 04:04:54 pm
content: Thank you Mike, I would prefer something low-profile/lightweight for this project.
EMI/RFI feed thru capacitors - Page 1
Forum section: electronics / general

author: rhb
author_rank: Super Contributor
timestamp: January 15, 2018, 08:47:35 pm
content: I'm looking for under 100 V and mostly under 1 A for RF and T&M applications. About the only place I can find plausible prices is Alibaba. I mostly got hits on AC line filters so I may be asking the wrong question. What I'm looking for is widely used by HP gear for control and power lines going into shielded enclosures.Thanks.

author: kony
author_rank: Regular Contributor
timestamp: January 15, 2018, 08:50:24 pm
content: Murata has plenty to choose from. In stock in regular distributors (mouser, digikey, TME)-
Hardware porn - Fujitsu mainboard manufacturing tour, Augsburg, Germany - Page 1
Forum section: electronics / general

author: maverickbna
author_rank: Newbie
timestamp: December 29, 2017, 11:55:40 am
content: Not sure what board to post this to, but I found a really cool video, showing the manufacture of mainboards for Fujitsu, including all the soldering, pick and place, etc.Wow, I didn't realize pick and place machines were so fast!https://youtu.be/ylk6VMBLrvM

author: jmelson
author_rank: Super Contributor
timestamp: December 29, 2017, 08:01:18 pm
content: Quote from: maverickbna on December 29, 2017, 11:55:40 amThese are the EXTREME high-end machines, for production of very complicated boards.Jon

author: mc172
author_rank: Frequent Contributor
timestamp: December 29, 2017, 10:23:49 pm
content: I have never seen anything like that through-hole placement machine before. It's nuts!

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 29, 2017, 10:48:32 pm
content: Quote from: blueskull on December 29, 2017, 09:51:56 pmThat video is 8 years old.

author: tooki
author_rank: Super Contributor
timestamp: December 31, 2017, 01:02:33 am
content: Quote from: mc172 on December 29, 2017, 10:23:49 pmTHT component placement machines have been around for something like 50 years. (That’s why components have come bandoliered for so long!!)Take a look at this beautiful video from 1974, which shows (at 2:55) what by then are mature automatic placement machines (among other automation). Not as fast as what came later of course. It’s neat how you’d have mixed components bandoliered in assembly order.Another video I remember that shows early automatic insertion machines is this 1983 video. It shows the custom component bandoliering at 2:13, automatic insertion at 3:13, and automatic adjustment and testing at 4:07.Finally, this 1955 film about factory automation gives you an idea of just how far along we were by the 1950s — I think it’s quite a bit more automated than many people realize.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: December 31, 2017, 12:19:16 pm
content: Quote from: tooki on December 31, 2017, 01:02:33 amAnd from 1947 - way ahead of its time, probably a little too far

author: tooki
author_rank: Super Contributor
timestamp: December 31, 2017, 12:39:22 pm
content: Ohhh yeah, I remember seeing that video a while back! Basically giant hybrid modules!
Insurance coverage for Dave's multimeter? - Page 1
Forum section: electronics / general

author: henryinsydney
author_rank: Contributor
timestamp: December 30, 2017, 10:28:17 am
content: Hello Dave and the forum,I was searching a bit but couldn't find an answer in this forum: Dave, are you covered if someone gets injured or killed using your DMM (or any other product you sell)?I'm asking because I'm developing a battery management system for boats and we're going into beta test in the next few weeks. Hence the question about liability came up.Cheers,henry

author: henryinsydney
author_rank: Contributor
timestamp: December 31, 2017, 02:39:05 am
content: Thanks for the clarification, blueskull.Maybe someone else can shed some light what type of insurance one would need if he sells small numbers of electric or electronic devices he's producing himself? That's a potentially world-wide market and the products would not have any electrial certification (during the early stages anyway).

author: Terry01
author_rank: Frequent Contributor
timestamp: December 31, 2017, 03:20:36 am
content: Eh?Surely that's like trying to sue the screwdriver maker if you get electrocuted opening a plug up because your trying to change a fuse?If your already worried about insurance maybe you'd better leave the electricity alone boss? My sister worries about the day she's never seen yet?

author: AndyC_772
author_rank: Super Contributor
timestamp: December 31, 2017, 08:06:43 am
content: What you're looking for is Product Liability insurance, and it's a standard offering that you should be able to get a quote for from any business insurer. If you manufacture or sell a product, and you think there's a risk that someone might ever get hurt or suffer a financial loss because of a defect in that product, then you should certainly consider having it.It probably won't be cheap, but then again, nor is getting sued because someone plugged in your product back-to-front and then blames you for the resulting fire.

author: beanflying
author_rank: Super Contributor
timestamp: December 31, 2017, 08:21:18 am
content: Mmmm Reminds me of so many of our recent Liability casesDrunken Unfortunate now paraplegic dives onto a sandbar in Sydney. Wavererly City Council got sued because their dumb asses had sought to have control below the hide tide mark on the beaches for enforcement reasons instead of the Commonwealth being responsible. Both sides are IDIOTS!Idiot 2 buys big kite flies in unsuitable conditions gets dragged through powerlines. Family sues retailler and importer .....So many timesThe Kiwi solution is closer to where we should be instead of the US ouch I stubbed my toe so I am suing.....All products being sold in Australia don't carry mandatory product liability insurance and unfortunately there is no idiot clause to prevent the importer or seller being suedhttps://www.business.gov.au/info/run/insurance-and-workers-compensation/liability-insurance-and-professional-indemnity
Manual monting SMD - Page 1
Forum section: electronics / general

author: ebclr
author_rank: Super Contributor
timestamp: December 17, 2017, 05:24:23 pm
content: Very well made device, Don't know the price but is on my dream listhttps://youtu.be/F9bRd8wS6GU

author: up8051
author_rank: Frequent Contributor
timestamp: December 17, 2017, 07:57:33 pm
content: Price is EUR 15,000-22,500https://www.alibaba.com/product-detail/SM-902-SMT-manipulator_105722634.html

author: DerekG
author_rank: Frequent Contributor
timestamp: December 17, 2017, 11:55:16 pm
content: So what other SMD loaders are out there that cost quite a lot less $$?The lack of magnification for visual alignment appears to be a major issue. Or did I miss it somewhere?

author: jmelson
author_rank: Super Contributor
timestamp: December 18, 2017, 10:00:22 pm
content: I can't imagine paying that kind of money for a MANUAL machine, when new (Chinese-made) full-auto P&P machines with vision are sold for less.I got a used full-auto P&P machine for under $4000 10 years ago. I've had a few problems with it, but it has been churning out thousands of boards over that time.I'd likely just do fully manual (ie. tweezers and soldering iron) SMT work rather than use such a contraption.With a good stereo-zoom microscope and tweezers, you can do a lot manually with no machine.Jon

author: tooki
author_rank: Super Contributor
timestamp: December 31, 2017, 01:21:29 am
content: What is the use case for such a device these days? You can get a real PNP machine for less, and it’s clearly not for one-off boards, since the setup for the thing looks pretty much identical as for a PNP.

author: henryinsydney
author_rank: Contributor
timestamp: December 31, 2017, 02:55:48 am
content: Interesting device for a niche market.
Can a 3 phase reflow oven be heated with 1 phase? Heller 988 - Page 1
Forum section: electronics / general

author: Merlysys
author_rank: Regular Contributor
timestamp: December 30, 2017, 03:25:21 pm
content: I know the best way is to buy/build a phase converter to get the 208V 3ph required. Just to get it going and running a few boards. Don't mind if it takes long to heat up or the board flow process has to be slowed down.We have 240V in the industrial unit (warehouse) and plenty of amps.I am talking about the heating elements only, I have a solution to make the control circuitry run.

author: jmelson
author_rank: Super Contributor
timestamp: December 30, 2017, 04:44:08 pm
content: Quote from: Merlysys on December 30, 2017, 03:25:21 pmThe heating elements are all going to be single phase. Possibly the SSRs that control them could be 3-phase, but likely each zone is run with a single element off one of the phases. So, you could rewire the whole control box to run off single phase. However, that will increase the current draw on the single phase feed by a factor of 1.732. So, some heavier wire may need to be put in. Another problem is that running 208 V heating elements on 240 V will increase the current draw in the element by 15%, and the power delivered by 33%. But, you could use a 240/208 autotransformer so at least the proper voltage would be supplied. I'd recommend that. A phase converter will not change the voltage, it will just generate a 3rd phase. I doubt a rotary phase converter will work very well on a massive resistive load. And, the Cedarburg-style "phase converters" with the starting capacitor and relay will do nothing at all (except catch fire).60 A?? YIKES! That's 21 KW. And, if rewired for single-phase, it will be over 100A.JonJon
Using ChipQuik as a low temperature solder substitute - Page 1
Forum section: electronics / general

author: saddle_au
author_rank: Newbie
timestamp: December 27, 2017, 06:32:07 am
content: I was just wondering if anyone has used the ChipQuik alloy as a substitute for lead/tin soldering. I need to repair some tab bonds that have gone bad and it occurred to me that the ChipQuik product might do the job as I don't have to heat the flexible carrier much to melt it, 65 degrees or so should do it. I am not as concerned with vibrational failures with the more brittle alloy, I was just thinking of whisker growth and the like of such a different alloy.All comments appreciated.
Custom plastic enclosure with logo / text printing prototyping - Page 1
Forum section: electronics / general

author: BarakG
author_rank: Newbie
timestamp: December 20, 2017, 11:56:38 pm
content: Hello,I'm searching for cheap service / manufacture to prototype custom enclosure that I've made in FreeCAD.Also it will contains Logo and text on the enclosure.could you please suggest me?Thanks.
Front Designer V3 by ABACOM - Page 1
Forum section: electronics / general

author: DerekG
author_rank: Frequent Contributor
timestamp: December 18, 2017, 04:14:23 am
content: I'm looking for a CAD program to design enclosure front panels.I have located Front Designer V3 by ABACOM that looks fairly nice as it already contains automated layouts for potentiometers, switches etc.I note that you can print a mirror image onto transparent film (which is then flipped over before affixing to the front panel). This means that people's grubby fingers would not wear away the images.But ......... I can't see anywhere where I could convert the image to a Gerber to send to a pcb board shop. This feature would allow me to use a pcb as the front panel itself.Has anyone had any experience with any cheap/free cap programs to convert any of these outputs:JPEG filesHPGL filesAutoCAD® SHX filesto a Gerber file?Presumably there are also standard printer drivers to print to laser printers etc.The end quality needs to be high.What other programs are people using to design front panels?https://www.electronic-software-shop.com/lng/en/electronic-software/frontdesigner-30.html?language=en

author: phil from seattle
author_rank: Super Contributor
timestamp: December 18, 2017, 06:27:26 am
content: I'm not sure how good it would turn out. But, you can make a board and import the image. Then go through the standard process for which ever vendor you use. There are eagle tutorials on this topic but I'd think you can do this in most layout packages.

author: LA7SJA
author_rank: Regular Contributor
timestamp: December 18, 2017, 01:20:37 pm
content: I have used this program to convert HPGL/2 to Gerber, but only for one project.http://www.softwarecompanions.com/gerbview.htmlJohan-Fredrik
2 different surface finishes on a single PCB? - Page 1
Forum section: electronics / general

author: smoothVTer
author_rank: Regular Contributor
timestamp: December 12, 2017, 08:53:40 pm
content: Does anybody have experience with the using 2 different surface finish on a single PCB?For example, my application includes non-soldermasked areas intended for snap-dome buttons. For longevity, the recommended finish for snap dome buttons is hard gold. These exposed metal button areas are smaller than 1cm in diameter. The remainder of the PCB can use HASL. I am wondering about the possibility of doing a 2-step surface finish process and whether doing 2 finishes would make the cost of the PCB higher than just doing a single-step full gold finish all-around.Of course I realize I could ask the manufacturer directly, but want to ask here first to avoid any 'gotchas' or pitfalls before making my inquiries to the fab. By the way, these PCBs will be made in China.

author: Gribo
author_rank: Frequent Contributor
timestamp: December 13, 2017, 08:06:23 pm
content: It is possible to use hard gold for certain parts (Dome pads, edge contacts) and HASL for other parts, I had one design with such setup, However, the fab charged extra for this, as it is another manufacturing step.
Cant find connector small enough - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: December 06, 2017, 03:16:37 pm
content: Hello,Hello, we need a wire to board connector, 2 way. Size less than 13mm x 8mm (length x width), and height less than 10mmWe need the connector (>0.5A) and rated to 400V at least. Though in nominal use it will have 75V between terminals.This is the connector (Wago) we currently use and its too big......Wago 2060-402/998-404 connector:http://www.farnell.com/datasheets/2059654.pdf?_ga=2.212812052.1228178003.1512389256-191120965.1491231686&_gac=1.11806592.1512396957.EAIaIQobChMIuJKv2sXw1wIVRrcbCh19bQMeEAAYASAAEgKaW_D_BwEWe simply cannot find anything,we have searched Wago, Pheonix, Molex, JST, etc, but nothing.Any ideas appreciated?

author: tszaboo
author_rank: Super Contributor
timestamp: December 06, 2017, 04:06:44 pm
content: 3 position 3.5 mm pluggalble terminal block, with middle position skipped?*that is a big picture.

author: DerekG
author_rank: Frequent Contributor
timestamp: December 08, 2017, 07:08:57 am
content: Simply put your requirements into the Digikey search box & see what is on offer:https://www.digikey.com.au/products/en/connectors-interconnects/rectangular-connectors-headers-male-pins/314?k=header

author: sparkswillfly
author_rank: Contributor
timestamp: December 09, 2017, 04:13:46 am
content: https://www.eevblog.com/forum/manufacture/smt-wire-to-board-connector/

author: HalFET
author_rank: Frequent Contributor
timestamp: December 10, 2017, 09:21:12 pm
content: How about those Molex Lite-Trap connectors? If you just need 2-way placing a few of those shouldn't be too much of a hassle, and they're quite forgiving in assembly and placement.
Need a cheap end-of-line tester....hipot, power, earth bonding. - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: December 10, 2017, 12:25:27 pm
content: Thanks.....indeed, we are using the Seaward ClareHal 104 production tester to do earth bonding, hipot, and output power measurements. The product costs £6k and we need another one but cannot afford it.So, we are currently using the Seaward ClareHal 104 end-of-line electrical tester...we need another, but the "104" is way too expensive and massively over-spec'd for our purpose....there dont seem to be any with our lesser requirements..do you know of any ?We need Hipot to 3750ac rms.The products are simple non-isolated offline 230vac led lamps. We need to hipot test from live/neutral to earth.Seaward ClareHal 104 production electrical tester...http://www.seaward.co.uk/products/industrial-electrical-safety-testing-measurement-equipment/safety-testing/hal-seriesThe Seaward ClareHal 104 product is massively over-spec'd for our products, because we only need to measure output power up to 200W, and the Seaward ClareHal 104 measures output power up to 5kW.Also, we do not need a power factor measurement from the production tester.Also, we only need to measure up to 1A of output current, and don’t need the measurement up to 20A as the Seaward ClareHal 104 provides.May I ask do you know of a similar product, but suitably down-spec’d, for our humble purpose?
slr camera mount for amscope trinocular head? - Page 1
Forum section: electronics / general

author: linux-works
author_rank: Super Contributor
timestamp: December 07, 2017, 04:02:38 pm
content: wondering if its a waste of time to try to adapt my olympus slr (4/3 not micro-4/3) to the amscope camera trinocular post?from reading online reviews of the amscope branded slr adapter, it seems to be kind of cheap and unsatisfying.I'd love to use the great sensor on my camera and I have spare slr bodies, but I won't waste my time if this is not a good solution.if this is a non-starter, are there aftermarket adapters that can adapt SOME kind of digicam (not webcam, I have no interest in laggy usb webcams that are sold as microscope sensor)?the $300 amscope purpose-built cameras also tend to get poor reviews from what I've read. my use is for hobby stuff, so I can't quite justify the cost of the microscope, again, for just the camera for it! (got a deal on a dual rail trinocular unit on amazon warehouse deals, about half price of the new one).hoping I can find some solution that lets me use that 3rd port for display on a monitor and photos. I don't need a high frame rate as I'll be more interested in stills than motion/video.

author: JPlocher
author_rank: Contributor
timestamp: December 07, 2017, 07:38:14 pm
content: I started down that path with a crude 3D printed adapter+ duct tape + chewing gum hack, but the weight and size of the SLR + lens on the trinoc port made the whole AmScope unit physically unstable when the head was extended on the rails, never mind that it no longer fit under my bench shelf.I didn't explore the image path (25mm + reduction lens + SLR lens...) because the physical sizes of the mashup didn't work for me...
PCB reflow technique - seeking advice - Page 1
Forum section: electronics / general

author: AndyC_772
author_rank: Super Contributor
timestamp: November 29, 2017, 02:41:08 pm
content: HiLast week I ordered a hot air station (JBC TE-2A) and a PCB pre-heater (Quick 854), in preparation for some PCBs I'll be soon be assembling.The first job I had for them, though, was a trial by fire. I needed to replace a few SMT LEDs on an aluminium PCB.The shiny underside of the board does a fine job of reflecting away the heat from the pre-heater, which needed to be turned right up to compensate. Even then, I wasn't able to get the board much above 115C (measured using a thermal camera) using the pre-heater alone.Conversely, the aluminium also conducts away heat from the hot-air station, so raising the local temperature of the board to the point at which solder melts requires a great deal of extra heat.But: the LEDs themselves are plastic, and melt at the slightest whiff of hot air.The technique I settled on after a few failed attempts, was to set the pre-heater to 350C, and to hold the PCB in a vice as close to the heater as possible. I set the hot-air station to 450C and 65% of max air flow, and applied heat to either side of the LED. After a while, the board finally became hot enough to reflow the solder joints, and the LED became attached to the board without melting.This worked fine until I tested the finished product. Unfortunately the solder paste I was using had softened with the heat, spread out into a puddle, and shorted the LED pins together underneath the device. I had to take them all off again.What eventually worked, was to tin the PCB pads with a regular soldering iron (JBC CD-2D with T245-C handpiece), melt them all with hot air, then place the LED onto the pads while the solder was still liquid. This gave better control over the quantity of solder, and where it ended up. I had to touch up some joints with the iron afterwards, but the final result worked perfectly.I'm hoping that when I start working on regular FR-4 boards, their relative lack of thermal conductivity will make for an easier job.In the meantime, does anyone have any tips to share for working on aluminium PCBs and/or with very heat sensitive components?

author: asmi
author_rank: Super Contributor
timestamp: November 29, 2017, 03:00:31 pm
content: Quote from: AndyC_772 on November 29, 2017, 02:41:08 pmGet a proper reflow oven. Or build one.Big advantage of oven is that it brings ALL parts and PCB to the same temperature, so there is no need to use much higher temperature air (and risk thermal damage of parts) in order to bring large copper pours up to the solder's melting point. You can even forego thermal reliefs if you don't intend to hand-solder parts, as reflow oven will bring everything to the reflow temperature. This also eliminates risks of any sort of cracks due to uneven heating, or damage from thermal shock - this is a big problem for small (0402) ceramic caps.
How is this technology called? - Page 1
Forum section: electronics / general

author: ivaylo
author_rank: Frequent Contributor
timestamp: November 24, 2017, 05:25:30 am
content: See images. It's like perfboard without copper (0.1" spacing and everything) and you can put "pins" in the holes where you solder the components on. Second image is just an empty piece with no pins installed on top of a breadboard for comparison. Appreciate your help...

author: Kean
author_rank: Unknown
timestamp: November 24, 2017, 06:30:32 am
content: Something like "Perforated Bare Phenolic"

author: Kean
author_rank: Unknown
timestamp: November 24, 2017, 06:33:59 am
content: The stuff with those extra large holes I think may have been called "peg board" in the old days.

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 24, 2017, 06:49:32 am
content: That was the original "Vectorboard" from 60 years ago. Invented by Vector Electronics and Technology. Long before pad-per-hole perfboard and plug-in "breadboard" technology.You can still buy the little pins and the board, but the newer technology seems far more convenient (and probably cheaper as well.)Company:https://www.vectorelect.com/Board:https://www.vectorelect.com/vectorbord-patterns.htmlPins:https://www.vectorelect.com/terminals-push-in.html

author: ivaylo
author_rank: Frequent Contributor
timestamp: November 24, 2017, 07:41:25 am
content: Thank you!

author: Bashstreet
author_rank: Frequent Contributor
timestamp: November 24, 2017, 07:58:32 am
content: Might still have some rare applications

author: vk6zgo
author_rank: Super Contributor
timestamp: November 24, 2017, 09:53:52 am
content: We called it "Matrix board" back in the late 1950s/ early '60s

author: Falcon69
author_rank: Super Contributor
timestamp: November 26, 2017, 02:13:15 am
content: We all understood what he (or she) meant. No need to correct him (or her) on it. Maybe English is not his first language, despite his flag in profile.

author: phil from seattle
author_rank: Super Contributor
timestamp: November 26, 2017, 02:34:38 am
content: Ug, I hate that stuff. It doesn't cut cleanly - reminds me of peanut brittle. Give me FR-4 or it's ilk any day.

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 26, 2017, 03:15:59 am
content: It is available in several different substrates including FR4 glass fiber. Agreed that the paper-phenolic stuff was terrible.

author: JPlocher
author_rank: Contributor
timestamp: November 28, 2017, 12:16:10 am
content: yeah, but when going for that old retro feel.....We always called it perf-board, or vector board. Still have a half drawer full somewhere.-John
Housing/Enclosure - Page 1
Forum section: electronics / general

author: EEVaditya
author_rank: Regular Contributor
timestamp: November 08, 2017, 01:05:16 am
content: Hello,Need Housing/Enclosure for vehicle (dashboard) mounted walkie talkie. (See attached photo for reference).The enclosure should have provision for volume knob & power button.And slot for wires (preferably at the back side of enclosure)Display and key not required.

author: EEVaditya
author_rank: Regular Contributor
timestamp: November 08, 2017, 02:56:09 pm
content: Hello,Where will I get such enclosure??? any suggestions

author: SMdude
author_rank: Frequent Contributor
timestamp: November 09, 2017, 01:47:07 am
content: Nope, you have to get a design done, a mould made and someone to injection mould it.It will be a very cost prohibitive process...You can try globalsources, but at minimum you will need a 3d cad design, or you wil not get what you want.

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 09, 2017, 02:09:54 am
content: Another route might be to have an existing enclosure adapted to your needs by the manufacturer. I know some Chinese outfits will do this.

author: phil from seattle
author_rank: Super Contributor
timestamp: November 09, 2017, 10:32:46 pm
content: Well, you could 3D print one.In general, it's a good idea to pick out your case before you design the PCB.

author: EEVaditya
author_rank: Regular Contributor
timestamp: November 10, 2017, 04:00:37 pm
content: Hello,Can I get readymade enclosure or housing and then I can cut or make provision of slots for volume knob and power button and wiresCan I get such enclosure which will look suitable shapewise for walkie talkie and then rest I can make changes according to my need

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 10, 2017, 04:18:27 pm
content: Quote from: EEVaditya on November 10, 2017, 04:00:37 pmHave you looked at something like this? No affiliation.https://www.aliexpress.com/store/1352312

author: EEVaditya
author_rank: Regular Contributor
timestamp: November 12, 2017, 11:12:08 am
content: Hello,I saw the suggested models on Ali express. But these housings gets open in two pieces(two parts). I want single piece housing. The housing should not be an attachment of two parts , it should be single continuous housing.

author: EEVaditya
author_rank: Regular Contributor
timestamp: November 14, 2017, 07:49:59 am
content: Any solution

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 14, 2017, 07:51:46 am
content: Quote from: EEVaditya on November 14, 2017, 07:49:59 amCan you show what you have done to solve your question so far?

author: JPlocher
author_rank: Contributor
timestamp: November 16, 2017, 06:32:01 pm
content: Your posts imply a desire for someone will come up with a product for you to buy - I hope you realize that this is a general discussion forum and not a design service or a front for a vendor who can sell you anything...-John

author: Raj
author_rank: Frequent Contributor
timestamp: November 26, 2017, 02:59:13 pm
content: Can you use seal-able bag?
J-STD-020D vs E Reflow Parameters/Tables - Page 1
Forum section: electronics / general

author: beaker353
author_rank: Unknown
timestamp: December 31, 2017, 03:06:05 am
content: Anyone have access to the newest J-STD-020 standard (version E) that can confirm that the suggested reflow parameters/tables for lead-free and lead-ed haven't changed since version D? I only have access to version D and wanted to make sure this hasn't changed in version E before I accidentally make a liar out of myself. Thanks all!-EM

author: beaker353
author_rank: Unknown
timestamp: December 31, 2017, 06:00:50 am
content: Quote from: blueskull on December 31, 2017, 05:01:35 amAs much as I appreciate the link, let's just say my Chinese seems to be too rusty to effectively navigate the site...-EM

author: beaker353
author_rank: Unknown
timestamp: December 31, 2017, 05:34:25 pm
content: Quote from: blueskull on December 31, 2017, 06:16:04 amThank you very much sir. For those you may find this post in a search one day: The end result is there is no change in suggested reflow parameters from vD to vE.-EM
Question about DDAYA PCB Store China - Page 1
Forum section: electronics / general

author: kacper10714
author_rank: Newbie
timestamp: November 25, 2017, 10:56:15 am
content: HiI am sorry, as he writes not in this section.Did you buy someone else's custom pcb in DDAYA PCB Store?https://www.aliexpress.com/store/product/Free-Shipping-Quick-Turn-Low-Cost-FR4-PCB-Prototype-Manufacturer-Aluminum-PCB-Flex-Board-FPC-MCPCB/1381175_32713074921.html?spm=2114.12010610.0.0.f2c6868Nn1SopThis is a good seller ?Can you trust him and make pcb in them?What quality do they have? Similar to PCBWay or better or worse?
TVM920 PNP Down Camera Not Finding Mark Point - Page 1
Forum section: electronics / general

author: chris2006
author_rank: Contributor
timestamp: November 23, 2017, 04:44:04 pm
content: Hi AllI have a TVM920 pick and place machine which is working OK apart from the down camera not locating the mark pointsI have adjusted all the settings in config but nothing improvesThe very occasional time it see's the hole in the PCB and auto centers but in most cases I have to manually align.Has anyone else had this problem and found a fix?ThanksChris2005
Free PCB from PCBway.com Size restriction? - Page 1
Forum section: electronics / general

author: RNA
author_rank: Regular Contributor
timestamp: November 22, 2017, 04:04:55 pm
content: So I thought I would take advantage of the pcbway youtube cooperation offer. They do not mention any size restrictions so it will be interesting to see what happens as my next design is for a 19" eq unit. I am hoping if I get enough views all will go well.Escaping the minimum order and getting it for free would really take the heat out the first attempt at a project.http://youtu.be/ccF7boomZR8https://pcbway.com/free_pcb.html

author: mrpackethead
author_rank: Super Contributor
timestamp: November 23, 2017, 02:15:01 am
content: Id say this is almost border line spam. I know that the chinese pcb manfuacturers 'pay' for good reviews, but this has lead to some pretty bad behaviors.MOderators what is the rule here ( or do you need a rule ).. If you are posting here in order to get a 'payback' from the vendors, is it spam and is it allowed or not?

author: Falcon69
author_rank: Super Contributor
timestamp: November 23, 2017, 03:28:27 am
content: It's phishing. Not spam.But ya. I dont think this is acceptable. He was clearly asking for hits on the youtube so he can get rewarded from pcbway with a free 19inch panel size pc board.But, i coulda understood that wrong.

author: RNA
author_rank: Regular Contributor
timestamp: November 23, 2017, 03:44:16 am
content: Well I can report you only get $30 dollar voucher and not the pcb of my choice. So not even worth the effort lol

author: RNA
author_rank: Regular Contributor
timestamp: November 23, 2017, 03:48:29 am
content: I have changed the thumbnail to the video so it doesn't look so garish lol

author: RNA
author_rank: Regular Contributor
timestamp: November 23, 2017, 04:04:03 am
content: Also I wrote back and told them they should change the wording to $30 voucher instead of free pcb and shipping.

author: RNA
author_rank: Regular Contributor
timestamp: November 23, 2017, 01:59:01 pm
content: SO they replied saying "Usually the size of our client's pcb below 100mm*100mm,so it will cover the total cost(freight included)" but they did add an extra $20 to my account.So in my currency that works out as £37.50 which scims in at just about worthwhile. It will certainly take the edge of if I have made any mistakes on the pcb design.