hybridfree/eevblog-posts huggingface dataset:
Cheap Flex PCB Manufacturers - Page 1
Forum section: electronics / general

author: Thane of Cawdor
author_rank: Regular Contributor
timestamp: August 25, 2017, 11:35:07 am
content: Hi everyone,I just wanted to get some opinions on some cheap flexible/rigid-flex PCB manufacturers from people who've recently placed orders and gotten successful results.Thanks!

author: tszaboo
author_rank: Super Contributor
timestamp: August 25, 2017, 12:25:07 pm
content: Flex PCB is only cheap (as of 2017), if you make 1000s of it. Otherwise it is multiple times more expensive than regular PCBs.

author: zeqing
author_rank: Regular Contributor
timestamp: August 28, 2017, 10:15:50 am
content: they are all traders but not the producer, so the quality almost the same. price much more higher.

author: zeqing
author_rank: Regular Contributor
timestamp: August 30, 2017, 04:00:34 am
content: i produced some Flex
Which is cost effective PCB or printed circuit film? - Page 1
Forum section: electronics / general

author: SreejitS
author_rank: Contributor
timestamp: February 24, 2017, 05:55:41 pm
content: Hello allI wanted to know whether it is cost effective to go for printed circuit film as they do with keyboards(image attached) or the traditional FR4 PCB. The size would be 40cm x 40cm and would be double sided design with maximum signal frequency going up to 1 MHz.I am talking about PCFs like shown below :http://image.made-in-china.com/43f34j00jZSEFKhywPqH/Keyboard-Flexible-Printed-Printing-FPC-Circuit-Board.jpgThank you

author: elecman14
author_rank: Unknown
timestamp: February 24, 2017, 06:03:06 pm
content: The best way to determine this would be to ask the PCB supplier you are dealing with to quote both traditional and flex (or get quotes on both designs). A pcb is a custom assembly that has a lot of factors that contribute to the cost.

author: richardlawson1489
author_rank: Regular Contributor
timestamp: March 09, 2017, 04:26:40 am
content: I agree. Have you received any quotation from PCB Manufacture? If not, PM me to get it.

author: Berni
author_rank: Super Contributor
timestamp: March 09, 2017, 02:06:39 pm
content: In high volume they should cost about the same, but just ordering a few prototype boards is a lot more expensive for these special flex boards. Expect to spend over 100 bucks for prototype runs.Also the ones you have pictured might be printed on a plastic substrate that can't stand the heat of soldering so only conductive glue or contacts are needed.

author: wraper
author_rank: Unknown
timestamp: March 09, 2017, 02:37:06 pm
content: Cost effective for what? What are you going to do?QuoteIf like those, you cannot solder anything to them, those are not alternative to the PCB.If you are talking about flex circuits (like Pyralux), they will certainly be much more expensive, especially at low quantities. Not to say you cannot simply put them into a pick and place machine and assemble like regular PCBs.QuoteExtremely large size for flex circuit.

author: wraper
author_rank: Unknown
timestamp: March 09, 2017, 02:42:35 pm
content: Quote from: Berni on March 09, 2017, 02:06:39 pmExpect over $1k+ for proto. Even 40x40 cm regular PCB will cost over $100. But I guess it will cost much more and many just won't make them because of the size.

author: ar__systems
author_rank: Frequent Contributor
timestamp: March 09, 2017, 04:37:06 pm
content: My customer was using flex circuits 38x38cm. Cost them $80/pc in volume.

author: vipcircuit.com
author_rank: Newbie
timestamp: August 23, 2017, 06:38:18 pm
content: Actually PCB on keyboard is almost the most cheap flex board,there is not difficult to do,but if do prototype, the cost may be higher. If product medium volume,like more than 3 sq,the cost of unit board will besave up a lot.Jeff from vipcircuit,thanks!
metal hand piece housing - Page 1
Forum section: electronics / general

author: Jellysfish
author_rank: Newbie
timestamp: August 17, 2017, 05:46:50 pm
content: Hi, my newest project involves a small hand piece to house a li ion battery and some chips. I know everything can fit in a 1in diameter tube, but I get the feeling that this would not look all that nice. I've check protolabs and emachineshop as well as some smaller local companies, but they all charge >$200 per part for even the simplest little tube. I have also considered turning the pieces myself with a harbor freight metal lathe which would be fun, just a bit time consuming and I'm not sure of the quality of pieces that come off a bench top lathe.Does anyone know where I can find a more cost efficient source for machined metal housing?

author: jmelson
author_rank: Super Contributor
timestamp: August 17, 2017, 07:56:01 pm
content: Quote from: Jellysfish on August 17, 2017, 05:46:50 pmThere are thousands of extruded, die cast and other metal housings available from distributors. Search Digi-Key, for instance. You can spend hours looking over all the different designs available.Not too sure there are many tubular designs, but maybe that isn't the best for your purpose, anyway.Jon

author: ar__systems
author_rank: Frequent Contributor
timestamp: August 18, 2017, 12:40:13 pm
content: get a piece of pipe and machine only caps.

author: Jellysfish
author_rank: Newbie
timestamp: August 22, 2017, 08:43:58 pm
content: Thanks jmelson! Yep I've spent many hours scrolling around digikey/mouser/etc but their stuff seems to mostly be boxes, not handheld-style/sized tubes.

author: Jellysfish
author_rank: Newbie
timestamp: August 22, 2017, 08:45:10 pm
content: thanks ar, this does seem to be my most affordable option right now!
Problems with switches soldering - Page 1
Forum section: electronics / general

author: ar__systems
author_rank: Frequent Contributor
timestamp: June 16, 2017, 10:29:56 am
content: I'm using GC10 lead free paste and pupulate boards with fair number of switches like thesehttps://www.digikey.ca/product-detail/en/c-k/PTS645SM43SMTR92-LFS/CKN9112TR-ND/1146840For some reasons some of the buttons are not soldered at all even though the paste fully melted. The leads are kind of sitting in an indentation of the pillow if solder in the end. Sometimes they just not connected at all and can be removed with no effort.Should I switch the paste?

author: ar__systems
author_rank: Frequent Contributor
timestamp: July 17, 2017, 07:26:16 pm
content: I've got some pictures. You can clearly see indentations from the leads on the pads. When reflown they look fine, they don't fall off on their own. But might fall of with just a little pressure... So annoying.Any help?

author: jmelson
author_rank: Super Contributor
timestamp: July 17, 2017, 08:50:34 pm
content: That's called head in pillow, a common problem. Generally, it is caused by not getting the board and component leads hot enough for long enough for the flux to break down the oxide layer on the part. With switches like that, they are probably real sensitive to heat, so you can't raise the temperature too much or the plastic might melt. Really, the only things you can do are up the temperature or the soak time while the solder is at full liquidus, or to get a more active flux.Jon

author: zeqing
author_rank: Regular Contributor
timestamp: August 05, 2017, 03:10:54 am
content: check your buttons if they are oxided? and try to clear the pins by robbing.

author: Jellysfish
author_rank: Newbie
timestamp: August 17, 2017, 05:54:25 pm
content: use a more aggressive flux?

author: ar__systems
author_rank: Frequent Contributor
timestamp: August 18, 2017, 12:38:59 pm
content: So far I'm leaning towards bad batch of switches. Sourced from Digikey. Few days ago I populated prototype board with them and 7 out of 8 did not attach to the board at all, they fully came off with minimal touch. From now on I will apply extra solder paste on the pins if I use those again (I have a bunch of loose ones).At the same time I assembled a small production batch of boards, using the same paste, same oven and settings, using new switches from China - over 1000 switches in total. No problems there.

author: langwadt
author_rank: Super Contributor
timestamp: August 18, 2017, 12:56:00 pm
content: old and oxidized, that's the risk with components of unknown age and origin

author: ar__systems
author_rank: Frequent Contributor
timestamp: August 19, 2017, 04:36:26 am
content: No they were not old. I bought them couple of month ago for another batch of boards. I had tons of issues...

author: tablatronix
author_rank: Regular Contributor
timestamp: August 19, 2017, 04:44:29 pm
content: I have noticed switches are typically filthy, probably because they are bulk produced and stored. Active flux, or I wonder if you could tumble them somehow to clean up the metal, but not plastic bits.. hmm
What actually happens at the fab house and some facts.  - Page 1
Forum section: electronics / general

author: anishkgt
author_rank: Frequent Contributor
timestamp: August 16, 2017, 07:05:51 pm
content: Hi all,I found this video really informative hence sharing with everyone. This was done by Robert Feranec.https://youtu.be/f6_svRNJYlsSent from my iPhone using Tapatalk
squeegee repair - Page 1
Forum section: electronics / general

author: ar__systems
author_rank: Frequent Contributor
timestamp: July 28, 2017, 04:49:50 pm
content: I got a used stencil printer, and I think I need to do something with the metal squeegees: the edges are kind of rough. I tried to run it over stencil and it catches on the apertures. I'm thinking to polish them a bit with sandpaper or... any other suggestions?

author: D3f1ant
author_rank: Frequent Contributor
timestamp: August 07, 2017, 06:19:32 am
content: Why not buy new blades?

author: jmelson
author_rank: Super Contributor
timestamp: August 07, 2017, 06:53:18 pm
content: Quote from: ar__systems on July 28, 2017, 04:49:50 pmWell, you could wipe them on a bench stone from the hardware store. That ought to remove sharp edges and make then pretty straight.Jon

author: ar__systems
author_rank: Frequent Contributor
timestamp: August 13, 2017, 08:30:21 pm
content: Quote from: jmelson on August 07, 2017, 06:53:18 pmYeah, I bought some fine sandpaper and fixed them that way.Where can I buy replacement blades? One blade is actually missing...
Tool for melting nylon spacers - Page 1
Forum section: electronics / general

author: slx
author_rank: Newbie
timestamp: August 10, 2017, 08:14:39 am
content: Hi, I am looking for a tool to melt tip of nylon spacers for mounting PCB. How it is called? Is it at all flattened hot or cold? And is it even using standard nylon spacers or special one?

author: Gyro
author_rank: Super Contributor
timestamp: August 10, 2017, 09:09:35 am
content: Welcome to the forum,Most nylon spacers come with either screw holes or push-in clips on the end to fit into the right size hole.If you actully need to melt the end then the normal 'accidental' method is a soldering iron, but this is messy and smelly. I recomment a small strip of brass or copper that you can press on the spacer end and heat the back with a soldering iron, this would give better heat control.

author: plazma
author_rank: Frequent Contributor
timestamp: August 10, 2017, 09:17:12 am
content: Google heat stake process. You can do it with a soldering iron with a proper tip and low temperature.

author: mairo
author_rank: Unknown
timestamp: August 11, 2017, 12:27:19 am
content: Search for "hot knife". Also you can get a cutting tips for some low cost soldering irons. Dave had a similar gadget in one of his 'recent' mailbags, whichI think was mainly advertised as 3d printing rework tool.Have a look at Dremel VersaTip Corded Tool Kit (not the gas version).

author: slx
author_rank: Newbie
timestamp: August 11, 2017, 07:22:27 am
content: Thanks for all replies. I should mention that it is for production in company and end effect should look nice. It would be used for many products, so the best it should take shortest time possible for workers to make one of this blobs. The proffesional machines likethislooks very good, but the prices are too high ($1000+). As I read about the heat stake process it is quite complicated (proper temperature, time of melting, forming and cooling). Maybe someone known other company manufacturing this kind of machines or hand tools with lower prices, something to $100.But also it is not very crucial, we currently use nuts, but main reason for trying to switch to a new method is (I think) lowering costs. The best would be a tip for soldering station (we have Wellers) but I not found any, big enaugh with concave. Also I am not sure if normal tip is suitable for this. I personnaly was used soldering station for plastic melting few times, but it was getting dirty after one usage and adhered remains smolded long time.@mairo: I see no special tip for this in Dremel tool.@Gyro: We use something likethis.

author: glarsson
author_rank: Frequent Contributor
timestamp: August 11, 2017, 07:39:48 am
content: JBC has special cartridges/tips for plastics. They have different shapes and coatings for different jobs.Look for C245-052, C245-053 and C245-054 for examples of cartridges for heat staking pins.I don't know if Weller has something similar.
USB connectors with SMD and through-hole bits - Page 1
Forum section: electronics / general

author: derGoldstein
author_rank: Regular Contributor
timestamp: June 29, 2017, 07:20:38 pm
content: I've been looking into different type-A USB sockets and many common ones have SMD leads as well as something that goes through the board.I think the most common of this type are these:http://www.mouser.com/ProductDetail/Mill-Max/896-43-004-00-000000/?qs=sGAEpiMZZMulM8LPOQ%252bykzAp4yt8IxVbC4TYTrunS64%3dhttp://www.mouser.com/ProductDetail/Keystone-Electronics/920/?qs=sZfk%252bfAlGe6z2j%252biDJes9A==They have the normal through-hole snap-in tabs, but the leads are SMT.Then there are these:http://www.mouser.com/Search/ProductDetail.aspx?R=87583-3010RPALFvirtualkey64910000virtualkey649-87583-3010RPALFhttps://www.digikey.com/product-detail/en/amphenol-fci/87520-1010BLF/609-4965-ND/1528160Which have a little "fork" that snaps into the hole in the board, which you don't have to solder, but you can (and probably should) for better mechanical stability.My question is, how are these assembled? They're not zero-insertion-force components, but do some pick-and-place machines have the ability to handle them?If not, then at what point during the assembly of the board would they be added? The SMD part suggests that you'd have the pads as part of a stencil, but then you'd have to take the boards out of the pick and place machine, add the USB sockets manually, and then reflow the whole thing.Alternatively, you could add a stage between applying the solder paste and placing them into the pick and place machine in which you manually insert them.Is there a standardized way of doing it?

author: Kean
author_rank: Unknown
timestamp: July 01, 2017, 06:44:17 pm
content: Yes, these types of parts are commonly inserted by hand following PnP and before reflow. And from experience they'll usually need extra inspection & rework following reflow. I've expereienced about a 5% failure rate due to poor solder joints on these types of connectors (the normal ones, not the snap-in style). Production batches weren't big enough to refine processes to improve that.

author: zeqing
author_rank: Regular Contributor
timestamp: August 10, 2017, 03:55:53 am
content: PCB assembly work for more than 5 years:in normal standard, the following step for pick-n-place and the following procedule:1. high speed PNP for resistor and capacitors.2. low speed PNP for IC and SMD connector3. one worker for manually placing some components , for these can not be place by machine4. one worker for checking5. reflowing...6. one worker to check the PCBA, if there any abnormal.7. visual checking8. other processing such as THT soldering.....so your connectors will be placed in the step 3.
New PNP machine : Neoden3V - Page 1
Forum section: electronics / general

author: TJ232
author_rank: Frequent Contributor
timestamp: July 26, 2017, 04:14:14 am
content: This seems to be a new released machine by Neoden with some interesting features for such size and price:http://www.neodentech.com/products_details.html?pid=1299410Is anybody out there that had the chance to see it a bit closer or working already with?Their video presentations are worse that you can imagine, these people really don't want to learn how to sell otherwise more than a decent product: 360p blurred videos, 11sec to about 1 min lenght, you must be kidding.Dear Neoden (but this is valid for many other PNP providers),Can you please do some good quality presentation videos and basic usage tutorials for your machines please? We are in 2017 not 1980! Also there are no secrets to hide doing low quality videos but only a good way to throw away a lot of potential customers. If somebody really wants to copy something from your machine, will buy one!I was waiting for this machine with great expectations and now I must admit that I'm very dissapointed.

author: sparkswillfly
author_rank: Contributor
timestamp: July 26, 2017, 07:57:22 am
content: Not very exciting, but I guess it can go against tvm802b and chmt48vb. Does it have any advantage over those?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 27, 2017, 10:50:07 pm
content: Quote from: TJ232 on July 26, 2017, 04:14:14 amAnd FFS get a native-English person to script and voice it.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: July 29, 2017, 12:20:41 pm
content: Mentioned about this (slapping vision on TM245P) all the way back in 2015 when I visited them in their factory. I guess it came a bit too late into the game.For me 2 important feature were left out on this machine, the 5 mm component height limit and the omission of nozzle changing capability (it's going to be pain in the butt to change the nozzle by hand halfway for a panel and changing it back again for the next panel). These are the deal breaker for me. If this were to be released back in 2015, maybe "yeah, it's good enough to do my small production run". But, competitors has since moved into the same segment (non cassette feeder range) with better specifications and feature.

author: ar__systems
author_rank: Frequent Contributor
timestamp: July 29, 2017, 01:08:19 pm
content: Yep, two nozzles without changer is very limited...
Cleaning stencils - Page 1
Forum section: electronics / general

author: Gary.M
author_rank: Regular Contributor
timestamp: July 26, 2017, 12:46:44 am
content: I'm not sure if this is new information, but here it is anyway.I use unframed stencils, obtained along with my pcbs.Usually after use I clean them with isopropyl alcohol wipes. I had a small amount of paste residue in some of the smaller apertures.To clean i placed the stencil in a flat bottomed dish (glass). I poured boiling water over it to a depth of about 2cm. I then sprinkled the stencil with sodium percarbonate granules. Left for 10 minutes. You can turn over and repeat if you like. Result is a spotlessly clean stencil.Sodium percarbonate granules can be bought quite cheaply, often advertised as an "oxygen cleaner". They are also used as espresso machine head cleaning "shampoo"

author: jmelson
author_rank: Super Contributor
timestamp: July 26, 2017, 02:35:35 am
content: I found that wiping with an acetone-soaked paper towel does a pretty good job, but if paste residue has stuck in the apertures, brushing with an old toothbrush does a great job cleaning them.Jon
Any manufacturer can make 8 layer HDI PCB with 1.0mm thickness& 2/2 mil lines? - Page 1
Forum section: electronics / general

author: cheerylaw
author_rank: Newbie
timestamp: July 14, 2017, 05:58:25 am
content: 8 layer HDI PCB with 1.0mm thickness + OSP &selective ENIG surface + 5 groups impedance control and stacked vias. These requirements are common, but there are many 2/2 mil lines in inner layers. This order is previously manufactured in Foxconn, but now the customer wants to transfer the order to a new manufacturer. Any PCB manufacturer can make it? no matter from China mainland or other area or country. If you can, I will drop the gerber files and detailed requirements to you. But pls attach your VCP line in your reply.

author: RobK_NL
author_rank: Frequent Contributor
timestamp: July 14, 2017, 08:43:13 am
content: I would try Würth Elektronik, if I were you:http://www.we-online.com/web/en/leiterplatten/produkte_/microvia_hdi_leiterplatten/Einleitung_HDI.php

author: cheerylaw
author_rank: Newbie
timestamp: July 17, 2017, 02:32:43 am
content: Thanks for your proposal. Taking cost and communication into consideration, we've finally decided to manufacture this board in China. At present, the prototypes are in the manufacturing process in *REMOVED*, which is verified with VCP and SCP lines, and complying to our requirements.

author: Yellofriend
author_rank: Regular Contributor
timestamp: July 17, 2017, 05:13:12 am
content: Quote from: blueskull on July 17, 2017, 02:35:09 amLol, I was waiting for that.
SMD solar panel reflow - how they did it? (low temperature solder paste)  - Page 1
Forum section: electronics / general

author: olkipukki
author_rank: Frequent Contributor
timestamp: July 15, 2017, 10:56:36 pm
content: I am looking on TI assembled boardhttp://www.ti.com/tool/tida-00488and wonder how they reflow a whole board.According a solar panel datasheet, recommendation to use a low temperature solder paste.Did they perform a step soldering or all components using same paste?What are disadvantages for low temp solder paste?
How to specify glueing capacitors to PCB - Page 1
Forum section: electronics / general

author: Chevymn1964
author_rank: Newbie
timestamp: July 10, 2017, 06:02:47 pm
content: Hi all, just wondering what the correct way would be to specify to a board assembly house to anchor down some large Cap's???Sent from my iPhone using Tapatalk

author: Yellofriend
author_rank: Regular Contributor
timestamp: July 11, 2017, 02:09:33 am
content: SMD or through hole?For SMD you need to glue them if they are on the bottom side and go through wave soldering. There is this red glue (forgot the brand) that gets applied by stencil and then needs heat cure.For wired we embedded them in silicon. I guess you can also use hot melt glue. For silicon you need to use the electronic type that has no vinegar acid in it. Window type is usually to soft anyway. I use for that a type from Wacker, cost was about US$70/cartridge.

author: alm
author_rank: Super Contributor
timestamp: July 11, 2017, 03:00:42 am
content: I was puzzled by the statement that through-hole caps are embedded in silicon, until I figured you probably meant silicone. That is a quite different substance!

author: Rerouter
author_rank: Super Contributor
timestamp: July 13, 2017, 11:03:21 am
content: for large capacitors, i will assume through-hole, if so you would discuss it with the company quoting you for assembly, they will have a process in place and will charge you something to do it, but will be able to do it.

author: noras
author_rank: Contributor
timestamp: July 14, 2017, 02:00:29 am
content: I would NOT use any type of silicon goop.It has a strong vinegar like odour that can be acidic and not good for copper.Not so good in heat applications.If anything, a polyurethane sealant would work well. Google SicaflexJust do any of this gluing as a very last stage... after final testing, because it will be difficult to unglue and this stuff may take a day or more to fully cure.Doesn't stink for days like silicon.Clean up hands with mineral turps.

author: DTJ
author_rank: Super Contributor
timestamp: July 21, 2017, 11:26:39 am
content: Quote from: noras on July 14, 2017, 02:00:29 amThere are lots of neutral cure silicone adhesives that are suitable for electronics use.They don't contain the acetic acid.
Sourcing pushbutton power switch plastic extension rod - Page 1
Forum section: electronics / general

author: TimNJ
author_rank: Super Contributor
timestamp: July 10, 2017, 09:28:00 pm
content: Hi all,Dave always gives a big thumbs up to products which use a pushbutton power switch in conjunction with a plastic rod/bar that extends to the front panel of the instrument. I've been looking far and wide for a commercial off the shelf part that fits the bill, but have not found any. Are these usually custom manufactured parts? If they are available, can you please point me to where I could get a hold of them?Thanks a lot,Tim

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 10, 2017, 10:19:40 pm
content: They're pretty much always going to be custom, and injection moulded.Might be feasible to 3d print, or lasercut for small qtys

author: TimNJ
author_rank: Super Contributor
timestamp: July 11, 2017, 01:42:46 am
content: Quote from: mikeselectricstuff on July 10, 2017, 10:19:40 pmThanks Mike. I guess I'm going to rule out that alternative then. I'm designing a PCB guitar amp and am planning on a selling a few boards (or maybe kits) if I can gather up some interest. Trying to keep obscure parts to an absolute minimum.I suppose I could run 120VAC down the edge of the board from the back to the front and into a PCB mount SPST or DPST switch. I've seen it done but I'm not sure what the EMI impact would be by adding a few more inches of 120VAC. Trying to keep everything PCB mount.Thank you.

author: edpalmer42
author_rank: Super Contributor
timestamp: July 11, 2017, 02:15:38 am
content: I've seen units that used a metal rod instead of plastic. That could be done without too much trouble. The Racal Dana 1991 and 1992 counters are like that.https://www.eevblog.com/forum/reviews/racal-dana-1992-teardown/You can clearly see the metal rod in a couple of the pictures.Ed

author: TimNJ
author_rank: Super Contributor
timestamp: July 11, 2017, 02:35:37 am
content: Thank you. Did think of metal but cannot figure out how I would reliably couple the rod to the plastic actuator. Looks like they've kind of heatshrunk them together in the Racal Dana? (Could work I suppose.)Perhaps a 1/4" piece of Delrin rod would work with the heatshrink approach. If not that, I could set up a little jig to bore out a hole (in the delrin) roughly the size of the switch actuator so the switch would fit inside the rod and then could apply a dab of epoxy to secure it.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: July 11, 2017, 03:41:48 am
content: They don't really need to be tightly coupled to the switch. That is only necessary if there are no other supports/constraints on the rod. If you want tight coupling there are some fairly easy options. A hole drilled through the switch push button (just the switch, not the cap that usually sits on it) coupled with a wire hook attached by any of several means to the rod is one.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 11, 2017, 08:42:56 am
content: Actually PCB would probably be quite a good material for this, depending on length & thickness.
Custom cutouts for enclosure - Page 1
Forum section: electronics / general

author: james211
author_rank: Newbie
timestamp: February 02, 2016, 03:57:30 am
content: I'm looking to get a standard enclosure with custom cutouts. The issue I'm running into is the cost, its crazy expensive just to have a plate cut with simple cutouts. Does anyone have any suggestions of a service they have used that is reasonable for low quantities?

author: pmbrunelle
author_rank: Regular Contributor
timestamp: February 02, 2016, 04:23:48 am
content: Do you want one plate, or do you want a box with all the sides?Or do you want someone to make cutouts in a standard enclosure?I have dealt with this shop:http://www.cbrlaser.com/You are supplying the DXF ready-to-go, right?

author: ve7xen
author_rank: Super Contributor
timestamp: February 02, 2016, 09:01:46 am
content: Try to find a local laser / waterjet place. It'll still be expensive, but probably much cheaper than a quote you'd get online.

author: james211
author_rank: Newbie
timestamp: February 02, 2016, 12:46:57 pm
content: Yeah good point. I can get laser cut plexi for dirt cheap so I might substitute plexi for the metal plate. I also considered doing a 3D print from 3D hubs since they can do aluminum and other metals now. Just getting quotes then I'll decide which way to go.

author: DerekG
author_rank: Frequent Contributor
timestamp: February 02, 2016, 01:30:27 pm
content: Quote from: james211 on February 02, 2016, 12:46:57 pmAlso consider using regular fibreglass pcb material. It comes in a variety of thicknesses, is cheaply routed by a board manufacturer & you can have a silk screen added very cheaply.

author: charlespax
author_rank: Regular Contributor
timestamp: April 13, 2016, 12:56:31 pm
content: Do you have a specific off-the-shelf enclosure in mind? There's a ton of places here in Shenzhen that would do small quantities. They have plastic enclosures and the extruded aluminum enclosures.Is this an open source hardware project? If so, I'd be happy to help you find a source.

author: alexandrecvl
author_rank: Newbie
timestamp: July 06, 2017, 02:48:05 pm
content: Are you still interested, if yes, just look here: box.mwf-services.com and here: panels.mwf-services.com
KJPCB via allpcb.com - Page 1
Forum section: electronics / general

author: mrpackethead
author_rank: Super Contributor
timestamp: June 08, 2017, 12:45:39 am
content: So, just received an order usign KJPCB, which i ordered via Allpcb.com..4 layer panel, 125x190mm, Gold ENIG, 6/6 spacing, min hole size 0.3mmThe silk screen was really good, hole registration was good as well, the mask ( green ) was accetable. ( it looks like it might be abotu 0.02mm out )..This fab apparently is setup for doing quick turn low volume.I ordered 25 panels on Thursday last week, and they arrived in my hand today via DHL ( in New Zealand ) today.. Price $USD158 + $32 freight.The person i deal with ( Erin, not sure of chinese name ) is generally very helpful and they seem to be able to resolve most issues pretty quick..I'll be definately giving these guys another order.. And NO i dont' get paid by them, i dont' take any 'bonus' money from them.. This was unsocilited,, just giving you my experience, and your experience might be different.www.allpcb.com/G4

author: mrpackethead
author_rank: Super Contributor
timestamp: June 09, 2017, 10:29:34 pm
content: See this post,.https://www.eevblog.com/forum/manufacture/allpcb-no-more-stencils-and-no-choosing-of-manufacturers/While they have produced some really great pcbs, they have serioysly just lost their way.. I seriously doubt i can use them any longer.

author: Erin.KOU
author_rank: Newbie
timestamp: July 01, 2017, 07:55:47 am
content: Quote from: mrpackethead on June 09, 2017, 10:29:34 pmHi,Thanks for confirm for our quality.And for your suggestion of reoffer stencil service, we have feedbacked to our boss andnow we will go on offer the service for the SMT-stencil,For a frameless stencil - min $13For a frame stencil (300*400mm? 370*470mm) - min $16Also It will be very appreciated that if any suggestions for our site , quality or service, welcome to contact me : erin.kou@allpcb.comErin KOUALLPCBwww.allpcb.com/G4
Documentation & Datasheets Software? - Page 1
Forum section: electronics / general

author: CM800
author_rank: Frequent Contributor
timestamp: June 29, 2017, 01:54:34 pm
content: Does anyone know what software people use generally for Datasheets?I am looking to redo some of our product's manuals etc, I like the idea of making them look more like professional datasheets like in the electronic components industry.What software do companies like TI, ON, Linear etc use?I tried doing it in MS word.... the outcome was far from appealing.

author: Spikee
author_rank: Frequent Contributor
timestamp: June 29, 2017, 03:11:28 pm
content: I used windows publisher before. for many things sooo much better than word.https://products.office.com/en/publisherOr adobe fireworks:http://www.adobe.com/products/framemaker.htmlAnd possible illustrator but it is not really made for this:http://www.adobe.com/products/illustrator.htmlNo idea what the pro's use. Maybe something custom? or just a template for one of these programs.

author: alm
author_rank: Super Contributor
timestamp: June 29, 2017, 03:29:41 pm
content: Quote from: Spikee on June 29, 2017, 03:11:28 pmFireworks?I would imagine they use a DTP package with templates. Framemaker used to be the standard for technical documentation. I imagine you could also do a decent job with programs like InDesign or even Scribus. Obviously graphs would be made in something else. Please no Excel graphs! Origin seems quite popular. If you do not want to spend that kind of money, Gnuplot can also give good results.

author: CM800
author_rank: Frequent Contributor
timestamp: June 29, 2017, 04:14:39 pm
content: While I have no qualms of spending money on what I view to be worthwhile, as a company, we'd rather not so much...How does publisher compare to the Adobe fireworks / framework software?It's £40 vs £800...

author: Spikee
author_rank: Frequent Contributor
timestamp: June 29, 2017, 04:31:15 pm
content: I'd assume you can download a trial of publisher and take a look.Used it a long time ago and it worked fine for me.

author: alm
author_rank: Super Contributor
timestamp: June 29, 2017, 04:38:00 pm
content: I think Publisher is more like an InDesign clone (despite pre-dating). So it lacks all the Framemaker features that makes it useful for complex documents. I imagine that might come in handy for a microcontroller datasheet (documents with hundreds of pages referencing half a dozen other documents of similar length).I have no experience with Publisher. Compared to the Adobe stuff it is likely a toy, but it may well be sufficient for not-too-complicated datasheets.
Home reflow oven: any reason not to use low-temp lead-free? - Page 1
Forum section: electronics / general

author: Mark
author_rank: Frequent Contributor
timestamp: December 07, 2016, 07:49:53 pm
content: A while ago I bought some low-temperature lead-free solder paste CHIPQUIK SMDLTLFP.Today, I tried it in a mini toaster oven (without controller) and unfortunately I slightly over-cooked it on the first try because I had stuck a thermocouple to the PCB with aluminium tape and the tape's adhesive failed at around 100 C. With asuitablecontroller (i.e. one capable of learning a lower temp profile) I think this paste would be quite a safe option for sensitive boards.Lead-Free / RoHS CompliantDescriptionSolder Paste Lead-Free Sn42/Bi57.6/Ag0.4 no clean Low Temperature Melts 138C 281F eutectic.Alloy: Sn42/Bi57.6/Ag0.4Flux Type: Synthetic No-CleanFlux Classification: REL0Metal Content: 87% metal by weight.Particle Size: T3 (25-45 microns)Melting Point: 138C (281F)Size: 5cc/15g syringeWhat are the negatives to using low-temp paste for DIY reflowed boards?

author: toshas
author_rank: Contributor
timestamp: June 21, 2017, 10:26:08 am
content: Hi!I have a same question! Why low temp solder paste isn't so popular?Is there any hidden problems with it?

author: KL27x
author_rank: Super Contributor
timestamp: June 22, 2017, 03:42:39 am
content: Longterm reliability might be compromised. Rework with a different alloy may cause further compromise. Shear strength from vibration or flex may be reduced. But if it works for you and provides some net benefit to you, then by all means, use it.

author: noras
author_rank: Contributor
timestamp: June 27, 2017, 01:21:45 am
content: my english is poor,but I think you can understand the following?First, the advantages of low temperature solder paste:The most commonly used low-temperature solder paste on the market is composed of tin and bismuth alloy Sn42Bi58, this metal alloy melting point is 138 degrees, reflow soldering operating temperature is generally around 170-180 degrees. And it does not contain lead, is the lowest melting point of lead-free solder paste in a solder paste. Low melting point will help protect the electronic components in the welding process will not be high temperature burns or burns. Such as: LED small beads, plastic, switches and other components are afraid of high temperature components.Second, the shortcomings of low temperature solder paste:As the low-temperature solder paste bismuth metal content of up to 58%, resulting in the alloy in the welding firmness has been weakened, because the bismuth metal is brittle metal, tin alloy copper alloy can not achieve the firmness, especially secondary When the smaller components easily fall off the bad phenomenon.

author: noras
author_rank: Contributor
timestamp: June 27, 2017, 01:23:24 am
content: Quote from: Mark on December 07, 2016, 07:49:53 pmBy the way low-temperature lead-free solder paste very popular with the LED industry
Dirtycables online cable assemblies - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 25, 2017, 09:02:26 am
content: http://dirtypcbs.com/store/cablesAbout time someone did this-if anyone uses them,please report back.

author: Yansi
author_rank: Super Contributor
timestamp: June 25, 2017, 11:08:13 am
content: Ah, interesting! Thanks for noticing.

author: ebastler
author_rank: Super Contributor
timestamp: June 25, 2017, 12:26:15 pm
content: Does that site actually work (yet)? I can't seem to get beyond the "error in inputs" message, whichever wire of plug I try to add to my assembly.

author: Yansi
author_rank: Super Contributor
timestamp: June 25, 2017, 06:38:15 pm
content: I have made a simple 4wire bundle without a problem? But didn't test if I can order.

author: edpalmer42
author_rank: Super Contributor
timestamp: June 25, 2017, 07:38:08 pm
content: I made a simple 6-pin IDC 20cm. cable. It costs $1.72, but the minimum quantity is 100. Oops!Ed

author: Yansi
author_rank: Super Contributor
timestamp: June 25, 2017, 08:19:12 pm
content: That IDC cable quite expensive, isnt it? I have tried some AWG30 with a 1,25mm pitch connectors (seemed like the molex picoblade ones) and the cost was very reasonable.

author: LabSpokane
author_rank: Super Contributor
timestamp: June 25, 2017, 09:00:05 pm
content: This will be brilliant if it works. I'll be placing an order soon.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: June 26, 2017, 06:02:13 pm
content: One thing I notices is it doesn't check cable compatibility - it let me spec a 16AWG cable into a 1mm pitch connector, which wouldn't end well.

author: Christopher
author_rank: Frequent Contributor
timestamp: June 26, 2017, 07:42:14 pm
content: Wishlist:Twisted pairs, triplesBasket-weave sleeving & heatshrink over the endsD Types/Molex KK/Custom ConnectorsPrices seem good, though. Would it just be cheaper for them to ship me a chinese kid to be my lab technican?

author: Monkeh
author_rank: Super Contributor
timestamp: June 26, 2017, 08:35:58 pm
content: Quote from: Christopher on June 26, 2017, 07:42:14 pm'KF2510'

author: LabSpokane
author_rank: Super Contributor
timestamp: June 26, 2017, 09:31:42 pm
content: There's a few things to be desired, without a doubt.BUT - if DirtyPCBs has all the proper tooling, then this is a no brainer. There's just no better solution than a vendor with the right equipment on hand. I will try to place my order by tonight for some JST XH series and see how that works out. My biggest worry is that the prices I see are too good to be true.

author: Monkeh
author_rank: Super Contributor
timestamp: June 26, 2017, 09:59:16 pm
content: Quote from: LabSpokane on June 26, 2017, 09:31:42 pmDirtyPCBs aren't making them themselves, they order them from existing custom cable manufacturers. Just like the PCB pooling service.

author: LabSpokane
author_rank: Super Contributor
timestamp: June 26, 2017, 10:16:19 pm
content: Quote from: Monkeh on June 26, 2017, 09:59:16 pmI suspected as much, but that's fine. My stuff has lots of cables, so if this gets them done affordably, amen.
Metcal tips -- SSC vs SxP - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: June 19, 2017, 06:19:03 am
content: As the title says, what's the difference between SSC and SxP for the same temperature grade?Say, SSC-7xx series 775F tip temperature cartridges vs SFP series 790F tips?It seems like Metcal advertises SSC series to be able to deliver more power, but they are both 60W cartridges, and that puzzles me.Their website also suggests SSC series is to maintain backward compatibility of outdated SP200 series.So, is SSC any better than SFP series for soldering large joints? I want to be able to solder some large joints on 2oz copper, and I don't have the budget for a 250W JBC or Metcal MX500. What I have is only a Metcal 1100 series and an FX-888D. I won't hesitate spending $100 on an SSC handle and a cartridge, though, but I want to know it is better then my collection of SFP cartridges.BTW, I also need a recommendation on Metcal tips, which is better for drag soldering? My current chisel and conical ones both bridges, and I don't have a hoof one to try. It seems like a hollowed hoof one is better, but I don't know if there is a Metcal tip that is hollowed hoof shaped (like Hakko BCM series).Thanks in advance.
Supplier for plastic injection molding in Asia - Page 1
Forum section: electronics / general

author: D3f1ant
author_rank: Frequent Contributor
timestamp: June 06, 2017, 08:38:28 pm
content: Does anybody have any experience or a recommendation for a plastic injection molder in Asia? I've tried a few places locally but not that excited by 6-8 week lead times for tooling alone, then another 2 weeks to for production to start. Hoping an Asian supplier can crank it out a bit quicker, and probably for 1/4 of the price.

author: garboui
author_rank: Regular Contributor
timestamp: June 06, 2017, 09:13:26 pm
content: I cant recommend any suppliers as you don't have enough detail about what you are going to mold. However, in my experience china can be quicker than that by often not by much as cot is the big benefit by going offshore (1/2 price tooling).With those lead times you also have zero margin for error, weather its finish related, dimensional, or expectations of a new to you supplier. Having to rectify any of these issues with a molder will be devastating to the timelines that you have mentioned. Unless you fly to china it is also likely to take longer to resolve any of these issues.If your deadline for production is hard and fast, you might want to look into getting some parts started as a buffer with a quick turn prototype service like protomould.

author: Koen
author_rank: Frequent Contributor
timestamp: June 06, 2017, 10:19:05 pm
content: Yes, tell us more.

author: D3f1ant
author_rank: Frequent Contributor
timestamp: June 06, 2017, 11:07:09 pm
content: Its a small plastic two part enclosure, around 50 x 20 x 10mm, it looks very simple (to me anyway) but has to be specific dimensions/shape so I can't use an off the shelf product. I can't post a image due to confidentiality. Thanks, It sounds like I may have to accept a long delay and keep it all Kiwi

author: bennyh
author_rank: Newbie
timestamp: June 15, 2017, 08:53:22 am
content: Quote from: D3f1ant on June 06, 2017, 08:38:28 pmThere are many kinds of plastic injection molder at this China's company cnyanfengcom, the price is fair enough.

author: mrpackethead
author_rank: Super Contributor
timestamp: June 16, 2017, 11:14:04 am
content: give Dave Pine At synapco industries in Lower Hutt a call. He works wonders and can keep it all kiwi
Needle gauge for Kester EP256 - Page 1
Forum section: electronics / general

author: knotlogic
author_rank: Regular Contributor
timestamp: July 13, 2017, 02:12:38 am
content: Anyone with experience using Kester EP256 who could recommend what gauge of needles works well with it? I'm thinking of picking up a syringe from CML supply, and figured I'll order some dispensing needles at the same time (though not necessarily from them too).My only other hand dispensing experience has been with the Zephtronics stuff. Unfortunately I left it out on the shelf too long, and it separated out quite a bit, and I haven't been able to mix it back well.
Anyone need the Free 2 channel Relay Module? - Page 1
Forum section: electronics / general

author: ansonbao
author_rank: Regular Contributor
timestamp: June 13, 2017, 01:57:18 pm
content: I ever posted herehttps://www.eevblog.com/forum/chat/anyone-need-the-free-2-channel-relay-module/msg1230888/#msg1230888Maybe not so many people see it, only one need this for his project.If the relay module is helpful for you,please leave comments here and I will send as a gift.Free module and Free shipping.Also if you have any other suggestions (like the module you want) or questions please reply to me.
The cost of laser cut Stainless Steel Stencils.. - Page 1
Forum section: electronics / general

author: mrpackethead
author_rank: Super Contributor
timestamp: June 12, 2017, 05:41:22 am
content: and why you would'tn use them at this price. 1RMB = 0.15 USD ( approx ).This is the price that you pay for it in Shenzhen China.. These are made on German LPKF cutters, and i've had excellent results with them. Due to changed circumstances with another supplier ( who was sourcing them from this supplier ) i've discovered its possibel to go directly to them. They will export overseas.. They also do PCB's. The prices for both PCBS and Stencils are even lower than what youv'e seen before!. The downside, they dont' have any english speaking staff ( so far that i've discovered ) and payment is not quite so straight forward.I'm going to put a sample order in the works and see how it flys...

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: June 12, 2017, 06:44:59 am
content: Got mine from Taobao without agent (King Full), finished in less than an hour, shipped by end of the day for RMB72 (domestic China shipment included) to a Shenzhen forwarder for 37cmx47cm.Another RMB33 shipping to Malaysia. Reach in 3-4 days. The weight that I was charged is only 0.7kg and this is volumetric weight. So, overall I paid around USD15.50!It's cheap and very professional that even all my prototype have laser cut framed stencil! Don't even bother to look at kapton or mylar stencil at this rate.

author: Kean
author_rank: Unknown
timestamp: June 12, 2017, 01:40:21 pm
content: Also, are they electropolished? Or at least is that an option?

author: mrpackethead
author_rank: Super Contributor
timestamp: June 12, 2017, 05:52:20 pm
content: Quote from: evb149 on June 12, 2017, 01:12:53 pmGoogle translate in action!! Its some less than ideal conversion..."network payment yuan / month"? Means just the sales price per piece, nothing to do with network or month?Yes you get the intent correct.. Standard per unit"express collection" -- is that rush express order and / or rush express shipping?"weight per person" is I guess the per item shipped weight ?Yes.Please let us know how it works out and what tips you have about ordering / payment etc. if it is a successful process.QuoteDepends.. You nornally can do both.. I not sure what the norm is, but i send mine to be made without adjustment, as i've done all my own adjustments to match our own process's exactly how we want them. If you are using someone else to do your builds then you need to talk to them about what the need. Theres quite a bit to it, you need to consider the stencil thickness, and apature ratios etc to optimise it totally.QuoteYes,.QuoteYes, those are all optons.Quoteyes. Though now for the cost of stainless, i'd never contemplate using kapton ever again.. Even for one offs. The release is superior and its easy to get good consistent results.