hybridfree/eevblog-posts huggingface dataset:
Help find a matching soldering iron tip - long with slit in the middle - Page 1
Forum section: electronics / general

author: kubatyszko
author_rank: Unknown
timestamp: November 09, 2022, 09:10:12 pm
content: Hi there,I actually have a Weller/Ungar 921Z station, and I do have some original tips (plus ebay being the source for NOS tips).BUT, many years ago, I stumbled upon this other idea of using modified Hakko tips instead.I bought one or two of them back in Japan, off the shelf, so I don't have any online record.The modification was easy, since the hakko tip had a slit in the middle, making the thin,flat heating element contact the tip on both sides - I'd snip off one side of that half-circle, and magically, the tip would become compatible with the 921Z.(I may have had to cut the tip to the length too, can't remember).I'm in fact still using one of these modified tips today in my 921Z, but since I'd love to get a replacement - I thought I'd ask the crowd.Do you have any recollection of hakko tips that would be long, with a slit through the middle ? Even better if you knew the model of the iron that used these tips, it may well be discontinued since my online searches came to nothing...NOTE - it's entirely possible the tips were not made by hakko, I only assume that was the case, but I'm not entirely sure...I remember that the tip had this very good looking blue anti-oxidation blob, it looked just like the one shown on the photo below (C type)https://store.shopping.yahoo.co.jp/nfj/o375.html#&gid=itemImage&pid=1Thanks

author: kubatyszko
author_rank: Unknown
timestamp: November 22, 2022, 06:25:16 pm
content: Oh how great it is to respond to my own post:)I finally found my old tips! Turns out I still have 2 moreThe Japanese brand is called Ceracote (so it wasn't Hakoo), the tip type is:Silver tip" SS-2CI basically snap half of that open slit, file it a tiny bit and it works flawlessly.I've had one of those tips on my Weller for like 7-8 years now.Cheers
Who is "microchipusa.com"???.......... - Page 1
Forum section: electronics / general

author: Smokey
author_rank: Super Contributor
timestamp: September 16, 2022, 08:47:34 pm
content: They got listed on findchips, and sometimes appear to have stock in the 1000s of otherwise impossible to get parts like STM32 micros.Their "About" page isn't exactly confidence instilling. The bios read like high school yearbook captions. And calling yourself a "serial entrepreneur" isn't something that makes me respect you more....https://microchipusa.com/about/Who are these guys? What is their primary market? Anyone here ever bought anything from them?

author: mon2
author_rank: Frequent Contributor
timestamp: September 18, 2022, 08:32:18 am
content: Avoid.https://www.bizapedia.com/fl/microchip-usa-llc.html

author: rooppoorali
author_rank: Regular Contributor
timestamp: September 27, 2022, 04:53:35 am
content: Here is the linkedin profile:https://www.linkedin.com/company/microchip-usa/about/Doesn't look like they have anything to do withhttps://www.microchip.com/

author: tooki
author_rank: Super Contributor
timestamp: September 27, 2022, 05:24:44 am
content: Quote from: Smokey on September 16, 2022, 08:47:34 pmSuper impressive! 20 years combined experience for a staff of 15!There’s that famous saying: “It’s better to be thought a fool than to open your mouth and remove all doubt.” I think a similar sentiment might apply to their “about us” page.

author: MarginallyStable
author_rank: Regular Contributor
timestamp: September 27, 2022, 05:52:25 pm
content: I do not see one grey beard on the "about" page...... That should be cause for skepticism of any "electronics" company.

author: Daixiwen
author_rank: Frequent Contributor
timestamp: September 28, 2022, 07:55:58 pm
content: Quote from: tooki on September 27, 2022, 05:24:44 amI had the exact same reaction. There are some facts they really don't need to publicise, especially to a public of engineers that will pick up that kind of stuff immediately.

author: tooki
author_rank: Super Contributor
timestamp: September 28, 2022, 10:17:45 pm
content: Yep. It’s not that I don’t want young entrepreneurs to succeed. But they’d have been wiser to say nothing at all about their background than to make it obvious that they’re all extremely inexperienced.

author: coppice
author_rank: Super Contributor
timestamp: November 20, 2022, 03:47:52 pm
content: Quote from: MarginallyStable on September 27, 2022, 05:52:25 pmThat's an odd criticism. They don't claim to develop electronics. They claim to distribute electronics. They should look like sales people, and the pictures do. They got that part right.
Seeking  more component distributors - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: November 16, 2022, 02:26:11 pm
content: Hi,We have nil stock on UUX2E100MNL1GC.250V, 10uF, 10 x 10mm 105degCDo you know of any more places we can search for it (an alternative but eqivalent)RS, Farnell, Newark, Digikey, Mouser.Whats the Chinese one thats with EasyPC?

author: SMTech
author_rank: Frequent Contributor
timestamp: November 16, 2022, 04:58:32 pm
content: You're thinking of LCSC.com which shows this chaphttps://lcsc.com/product-detail/Aluminum-Electrolytic-Capacitors-SMD_Honor-Elec-UD2E100M1010_C88697.htmlnot that historically using off brand electrolytics has proven wise.Other disty's not on your list, rutronik, wurth (direct),anglia (anglia-live.com),TME,TTI,CPC,arrow,Future, ...... random broker e.g electronics direct, Cyclops or IC Blue

author: tooki
author_rank: Super Contributor
timestamp: November 20, 2022, 02:03:17 am
content: Quote from: Faringdon on November 16, 2022, 02:26:11 pmHow do you even survive? I picture you dying of hunger and having a fruit tree in your front yard and not putting 2 and 2 together…All jokes aside, how can you not figure out how to search for alternative parts on your own? You look up the specs of the original and then go look for similar doodads using parametric search. It’s really not rocket surgery…

author: seon
author_rank: Regular Contributor
timestamp: November 20, 2022, 05:36:03 am
content: Have you used Octopart before? It's a great way to see who sells certain components - not always up to date, but good enough for expanding ones search!https://octopart.com/search?q=UUX2E100MNL1GC&currency=USD&specs=0SeonUnexpected Maker
Boeing ISFD / Airbus IESI / Airbus ISIS - Page 1
Forum section: electronics / general

author: SQWave
author_rank: Newbie
timestamp: November 18, 2022, 01:31:57 pm
content: I am working on a flight simulation version of the Thales standby attitude indicator, which is used in various aircraft with slight modifications.It is used in Boeing aircraft, Airbus airliners and helicopters, and more. We already got a prototype running in a simulator, but we're now trying to improve the prototype for production.The real unit has a light sensor, which I would love to add to make it just a little bit more accurate.This questions is somewhat of an 'investigation/search' I guess.I have included 3 images, one of a black IESI from a helicopter, in which you see the sensor in the red square.Ideally I would use the exact same sensor, but of course this information is not available.The window is about 5x5 mm, it fits in there. It looks like it is a 3 legged component. Most probably a phototransistor?Does anyone have any idea of which component this might be? I know that it is a long shot, but maybe I'm luckIf I cannot find it, then I will use something 'generic'.In any case, thank you all in advance for your suggestions.

author: SQWave
author_rank: Newbie
timestamp: November 18, 2022, 01:46:21 pm
content: By the way, I already had a suspecthttps://ie.rs-online.com/web/p/phototransistors/1685320But maybe someone has a better suggestion or can confirm my suggestion.
Feeder setup for chinese PNP machines - Page 1
Forum section: electronics / general

author: pisoiu
author_rank: Regular Contributor
timestamp: November 17, 2022, 07:44:15 am
content: Hi all,I need to buy a small machine for prototypes and small batches. Currently I am looking at SMT330-LX from YX, it is pretty similar with zhengbang ZB3245. While it has almost everything I need, there is one issue which I don't understand it very well. OpenPNP, which I use on another machine, lets me define any number and any type of feeders, as long as I have room on the table for them. On the other hand, chinese pnp software have some limits, but without having the machine and software, I can only guess from chinese documentation. I never seen or used chinese pnp sw. So far I think it accepts maximum 3 IC trays, from what seller tells me. I have a lot of cut tapes I need to use, at least 10-20 (some big ones - 56mm), and I need to place them around the board in 3d printed supports. Can anyone tell me if I can define that number of cut tapes (or ic trays as 1 row and n columns) to be used for picking? Thanks.

author: MR
author_rank: Regular Contributor
timestamp: November 18, 2022, 04:28:12 am
content: Did you give up on your DIY PNP machine?looks like this machine is using a drag mechanism by using a small stub on the pick and place head, it enters the hole of the tape and just drags it forward.You won't be able to interface alternative feeder with this setup and the feeder setup will take quite some time for it.The plastic tape will be peeled off with the plastic roller which very likely can adjust the peeling force with a setscrew (my opinion ... it works but has to be re-adjusted from time to time).I think you have some machining experience so you should be able to make your own slot plate for the tapes.

author: pisoiu
author_rank: Regular Contributor
timestamp: November 18, 2022, 08:21:22 am
content: No, did not gave up. My machine is almost functional for production, I just have to figure out a nasty 0.2mm constant deviation on Y which still eludes me. Some calibration issues somewhere. That machine is in another place and I thought for really small jobs I need something more accessible like a desktop one.But now I have some second thoughts with chinese machines, seeing how inflexible is the software. And quite far from what I need regarding the use of cut tapes.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: November 18, 2022, 10:26:15 am
content: If you are willing to spend a little bit more, ZhengBang has the one with CL feeder albeit 38 slots only. It does have a work place for you to litter your cut tapes and what not. There's a series of their software tutorial on YT. I find that their software is very intuitive. That was the unit that I went after before I settled for the bigger HW-T4-50F from HWGC.
Need to find software for obsolete Metcal BGA/CSP Rework Station (3500 Series) - Page 1
Forum section: electronics / general

author: calmissile
author_rank: Contributor
timestamp: September 05, 2022, 05:47:20 am
content: Looking to find a copy of the software used with the Metcal BGA-3500 series workstation. Also used nozzles for that station as well.Unfortunately when the scrap dealers buy the stuff the accessories are almost always missing.Any help is appreciated.Dougcalmissile@gmail.com

author: mon2
author_rank: Frequent Contributor
timestamp: September 05, 2022, 09:30:46 am
content: Suggest to post the same request on the smtnet user forum.

author: mairo
author_rank: Unknown
timestamp: September 06, 2022, 04:40:28 am
content: I have it and runs on a VM (XP pc with some older windows running in the VM, 98 I think), may need to send you the entire VM. The only catch is that I will not have access to the system for at least 4 weeks.I believe I got mine ~ 10 years ago by asking Metcal directly by sending an email directly to one of the engineers given in the manual of the machine.

author: calmissile
author_rank: Contributor
timestamp: September 07, 2022, 02:48:14 am
content: That would be great. Waiting 4 weeks is not a problem. Thanks,Doug

author: lijianwei652@gmail.com
author_rank: Newbie
timestamp: September 10, 2022, 03:07:34 pm
content: I have the same appeal. If you find this software, can you share it with me? Thank you verymuch. my email :lijianwei652@gmail.com

author: calmissile
author_rank: Contributor
timestamp: September 16, 2022, 06:28:09 am
content: Mario,Thanks for the offer, but I found the software. Works great.By any chance to you have the Height Adjustment Block used in the setup. I have to machine one. If so, could you send me the measurements?Also, I am looking for any Metcal BGA 3500 nozzle (bayonet connection). I need to make an adapter so that I can use other nozzles that are available.Thanks,Doug

author: vouager
author_rank: Contributor
timestamp: November 16, 2022, 11:08:06 pm
content: @calmissileHello,I recently bought a machine but unfortunately the software is not included.As I read here you found it somewhere.Can you please send me a copy of it or upload it to google drive or something?ThanksRegards from Austria
Need to open PCB enclosure solidworks files - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: November 16, 2022, 03:36:07 pm
content: Hi,Please could you advise on how I can open solidworks files (to view free of charge) so I can see inside the enclosures of our PCBs?Every now and then we have to find an alternative SMD capacitor for a nil-stocked one. We can often only find an alternative of a greater height, and then need to get the mech files to see if it will fit in.

author: Kean
author_rank: Unknown
timestamp: November 16, 2022, 06:59:53 pm
content: SolidWorks offer eDrawings Viewer for free viewing of 3D files.https://www.edrawingsviewer.com/You could have found that with a Google search in less time than typing your post.
Are METCAL MX series tips compatible with TMT-9000S ? - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: November 11, 2022, 03:52:43 am
content: Are METCAL MX series tips compatible with Thermaltronics TMT-9000S ?They are very similar irons, and I think Thermaltronics are licensing metcal tech in their irons.And they look the same.

author: thm_w
author_rank: Super Contributor
timestamp: November 13, 2022, 03:17:59 am
content: Yeah, if you look at the amazon listings they will tell you the Metcal equivalent. Just be careful and double check, in case you click a suggestion thats a different style.They make Hakko compatible tips as well for $11, which is essentially the same materials but half as long.Reasonably priced in NA at least.
Multiple DC output Power supply - Page 1
Forum section: electronics / general

author: Md_Aslam
author_rank: Contributor
timestamp: October 25, 2022, 09:21:43 am
content: Can Anyone suggest me a DC power supply with multiple output options like 1.8v, 3.3v, 5v and 12v. I want an evaluation board kind of Device which will be embedded with all the different outputs in a single board.Waiting for quick reply...........

author: lyxmoo
author_rank: Contributor
timestamp: November 01, 2022, 06:02:45 am
content: EA3036 3trailshttp://www.szlcsc.com/product/details_112814.htmlEA3059 4tailshttp://www.szlcsc.com/product/details_112813.html

author: bidrohini
author_rank: Regular Contributor
timestamp: November 11, 2022, 07:38:57 am
content: You can consider Adjustable Breadboard Power Supply Kithttps://learn.adafruit.com/adjustable-breadboard-power-supply-kit

author: Infraviolet
author_rank: Super Contributor
timestamp: November 12, 2022, 06:38:01 pm
content: There are wall wart power supplies available with a switch on the back which you can use to set different voltages:These sort of things:https://uk.farnell.com/w/c/power-line-protection/power-supplies/ac-dc-converters/ac-dc-external-plug-in-adaptor-power-supplies?power-supply-output-type=adjustable
NeoDen 9 Pick and Place machine - has anyone used it ? - Page 1
Forum section: electronics / general

author: motyr
author_rank: Contributor
timestamp: August 19, 2022, 10:54:27 am
content: Hi,We have just been offered a NeoDen 9 machine which we are considering for our small R&D Lab / low volume production. Has anyone used it and can share their experience ?Reading this forum and some other I can see that NeoDen 4 does not have the best opinion, is it something carried out to other machines as well ?Thanks

author: JeremiahB
author_rank: Newbie
timestamp: November 11, 2022, 09:07:23 pm
content: We recently bought a Neoden 9, And I find it a great machine, Easy to use, and works well. We did purchase it from Neoden USA, so I can't speak at all on getting one direct from China or a different supplier.
SMD caps and resistors dont have solder mask oversize for P&P? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: November 08, 2022, 07:00:24 pm
content: Hi,Just been given a PCB to populate and take to prod (500W offline SMPS).The Res and caps have no solder mask oversize.Is this the way to go for pick and place?I mean, ive never done it before like that, but maybe its professionaly deemed as being the best way?(I usually have 0.14mm oversize.)

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 08, 2022, 08:13:26 pm
content: Show a pic of the footprints. Preferably up close / macro / zoom / microscope, preferably with a fine scale in view.Tim

author: Faringdon
author_rank: Super Contributor
timestamp: November 09, 2022, 05:16:24 am
content: Thanks, will do, but it just shows copper pad, in solder resist "window" being the same size...instaed of the solder resist window being oversized.

author: jmelson
author_rank: Super Contributor
timestamp: November 09, 2022, 03:59:15 pm
content: This oversize solder mask window was from the days of silkscreen. Nowadays, solder mask is usually photoimaged, so is as accurate as the component pads. So, I guess the oversize is not needed. In the old days, misregistration of the solder mask silkscreen was often seen, and varied depending on how good the fabricator was.Jon

author: SMTech
author_rank: Frequent Contributor
timestamp: November 09, 2022, 04:17:51 pm
content: Hmm I can see it defined in most gerbers, its not exactly obvious looking at a board..........PCB fabs will tend to complain if tiny pointless slivers of resist exist between pads on a fine pitch device, but they'll ignore them if you say its fine.

author: Faringdon
author_rank: Super Contributor
timestamp: November 09, 2022, 06:40:49 pm
content: Thanks i see your points.First few board will need some hand soldering and i always find the lack of oversize makes hand soldering much more difficult.
Dark IR BGA rework machines - Page 1
Forum section: electronics / general

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: November 07, 2022, 03:18:23 pm
content: Hi,I have seen some BGA rework station with Dark IR emitter technology, I want to know if we have chines manufacturer of these Dark IR emitters? also If you have any experience using these machines, regarding the quality and usage of these machines it would help a lot if you tell your user experience with them.Do you recommend them over the conventional Hot air versions?

author: thm_w
author_rank: Super Contributor
timestamp: November 07, 2022, 09:39:03 pm
content: https://www.eevblog.com/forum/manufacture/are-hand-held-irda-welders-any-good-for-smt/QuoteSo you are talking about the heating element style IR heaters, and not the infrared lamp style ones.What is your specific use case? Usually these are used for large BGA rework, where you will preheat and take the time to set up a temperature probe.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: November 08, 2022, 10:16:42 am
content: Thanks for the update, I want to buy a BGA rework station, so I want to get feedbacks on it, also I was wondering which IR heating element they use, so if it would fail after a few years, I could find replacements and know the price in advance.

author: thm_w
author_rank: Super Contributor
timestamp: November 08, 2022, 09:00:53 pm
content: Quote from: ali_asadzadeh on November 08, 2022, 10:16:42 amThe generic ones are quite cheap:https://www.aliexpress.us/item/3256801090219480.htmlhttps://www.aliexpress.us/item/2251832630525861.htmlhttps://www.aliexpress.us/item/2251832678718530.htmlhttps://www.aliexpress.us/item/2251832680276217.html(build your own)You can see how wide they are, so you'll either need some metal nozzle/shutter system, or place reflective shielding on the board if you have sensitive components.edit: you can delete the duplicate threadhttps://www.eevblog.com/forum/projects/dark-ir-bga-machines/
Low viscosity potting compound for electronics - Page 1
Forum section: electronics / general

author: dimbmw
author_rank: Regular Contributor
timestamp: November 03, 2022, 01:58:51 am
content: Hello everyoneI’ve seen it many times on some electronic boards I’ve repaired over the years, a clear jelly- like sticky substance.What is it and where can I buy it?I need a stuff with very low viscosity to fill some narrow areas as well as all the volume where the PCB is located.Thank you!

author: andy3055
author_rank: Super Contributor
timestamp: November 03, 2022, 02:31:39 am
content: On a site like Mouser, search for potting compound. You can check the spec sheets and go from there.

author: Kean
author_rank: Unknown
timestamp: November 03, 2022, 03:57:06 am
content: The clear "jelly" stuff that I have used is called Magic Gel from Raytech.https://www.raytech.it/It isn't low viscosity though. Nor is it cheap, but not many good potting compounds are.Edit: The Magic Gel datasheets do state "low viscosity" - so check the specs to see if it is suitable for you.

author: dimbmw
author_rank: Regular Contributor
timestamp: November 05, 2022, 06:12:59 am
content: Quote from: Kean on November 03, 2022, 03:57:06 amThank you, could you suggest what is it’s approximate shore A hardness when it dries?There are no viscosity numbers in the specs… but it looks very liquid on video.10 min working time is very short …

author: Zoli
author_rank: Frequent Contributor
timestamp: November 06, 2022, 04:52:03 pm
content: Quote from: dimbmw on November 03, 2022, 01:58:51 amTough-sealfits your description, but: black, and cured is rubber-like-consistence; it has ~1h working time, available in 50ml cartridge to try out(dispenser & mixing tube recommended for partial use).
uP9636 powerstage footprint - Page 1
Forum section: electronics / general

author: qosch
author_rank: Newbie
timestamp: November 09, 2022, 10:05:33 am
content: Hey everyone,I hope I am posting this in the right spot.I found a very interesting part in the JLC parts library: a half bridge gate driver + integrated mosfets for 25V with 6.9mR (max) R_DS,on. So a very compact power stage for ~15A continuous current.The only issue (apart from the part being obsolete) is the footprint. It is called WQFN4x4-26L and there are 3 drawings I could find (see attached images)Data sheet front page (top view)Data sheet package information (bottom view)And a Screenshot of an EasyEDA footprint linked at the JLC page of the part.The biggest issue for me is to guess what pads have what pitch. Some seem to have 0.517mm, others 0.45mm.Secondly it seems the pads on the sides (7-13 and (20-26) do not seem to be centred but I can't find any measurement indicating where they are located.Can anyone make sense of this?Does anyone know a similar part (low voltage half bridge with integrated gate driver and power switches in a small footprint)?Thanks for your help!

author: Kean
author_rank: Unknown
timestamp: November 12, 2022, 04:49:13 am
content: Yes, it looks like pins 1-19 are 0.46mm BSC and pins 20-26 are 0.517mm BSC. It does seem like the "side" pins are not centered with not suitable reference, which means you really want to get hold of some samples before going further.As the part does seem to be in the EasyEDA library, maybe create a simple design there with that part and take measurements. I'd still suggest getting real parts and checking measurements before committing to anything beyond a cheap test PCB.
Workbench height for SMT? - Page 1
Forum section: electronics / general

author: Martinn
author_rank: Frequent Contributor
timestamp: November 04, 2022, 04:34:58 pm
content: Hi all,I guess this is very subjective, so I am asking for opinions.For ages I had an old Ikea living room table as my workbench, which at 70 cm I find a bit low for microscope/SMT work. As I plan to build a new bench anyway, I am more or less free to define a new height.My computer desk has 76 cm, which I find comfortable. So probably anything between 70+ and 80 cm might work, some differences could be compensated for using the chair height adjustment.What are your preferences?Thanks! Martin

author: rea5245
author_rank: Frequent Contributor
timestamp: November 04, 2022, 04:36:40 pm
content: Quote from: Martinn on November 04, 2022, 04:34:58 pmInches.

author: Jackster
author_rank: Frequent Contributor
timestamp: November 04, 2022, 04:43:03 pm
content: I have my desks at 84cm. When low in the chair, my arms are just right for typing on a keyboard and using a mouse.It's great for getting a low angle onto a board for rework and I can just pump my chair or stand up if I need to get ontop of a board.

author: jpanhalt
author_rank: Super Contributor
timestamp: November 04, 2022, 04:56:52 pm
content: Here's a typical jeweler's bench:https://pmcsupplies.com/deluxe-solid-wooden-jewelers-bench-set-with-shelf-organizer.html?gclid=EAIaIQobChMIgLCB4PyU-wIVl-7jBx1jGgE_EAQYAyABEgIl8PD_BwEIt's 39" (99 cm) high. Having your arms a little higher than for, say, a dining table or writing desk will help with fine hand work. Adding a microscope instead of a loupe may change that. If it's an optical microscope you may need a much lower desk. If it is an electronic one with camera, then that height shouldn't matter. My assembly/dining room table is 31" (79 cm), which is a little higher than the common 30", but I have a low chair that gives me a little elevation.In other words, I would err on the high side, unless you are using an optical microscope. (I use a headband loupe.)

author: Martinn
author_rank: Frequent Contributor
timestamp: November 04, 2022, 05:43:42 pm
content: Quote from: jpanhalt on November 04, 2022, 04:56:52 pmAfter having purchased a small number of those professionally, I managed to buy a used Zeiss Stemi 2000 for my own workplace with a (unfortunately non-Zeiss) 0.7x barlow lens. This comination has 36 cm (14.2") eyepiece center height.99 cm/39" sure is too high for electronics! At my work desk, my chin is at 107 cm (42.1"), but I see the point for a jeweller doing lots of closeup work with a loupe.
Pinout and/or datasheet for Mitsubishi M59108FP 922100 D353 - Page 1
Forum section: electronics / general

author: newtoCBs
author_rank: Newbie
timestamp: October 31, 2022, 05:04:44 pm
content: Looking for the pin out preferably and/or datasheet for a Mitsubishi-logo'd 2 x 16 pin chip with the following printed info on its top:M59108FP922100D353(Haven't been able to find it on the i'net .)Anyone have access to the pinout ... or datasheet?Know what the chip is and what it does?Know how the #s might translate to other #s that would enable me to find the chip and its pinout? (Like Motorola's masksets do on MCUs without the "MC68..." sequences on them.)The Mitsubishi-logo'd chip is on an early Hyundai Cruise Control circuit board, along with Motorola MCU MC68HC05C8or4.Thanks!

author: newtoCBs
author_rank: Newbie
timestamp: November 04, 2022, 05:34:25 pm
content: Anyone?Perhaps someone in Japan or within Mitsubishi who can find the pinout and/or datasheet?
Planar transformer design and assembly? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: November 04, 2022, 10:38:28 am
content: Hi,Do Switch Mode Power supply designers usually design and layout their own Planar transformers?....or do they always type their spec into some proprietary software which designs it for them?......or do you literally end up giving the spec to a planar company who do it for you?I hear Planar can end up with either very low or high interwinding capacitance and leakage inductance, so you really need it to be done in some special analysis software?......just hashing together a planar transformer "free-hand" by yourself is unadviseable, because it will be expensive, and you may then find out that its parasitics are very unfavourable.Doing the planar windings on a PCB looks quite interesting.....How woud you go about doing planar winding PCBs in Eagle Pro, say?Are any PCB layout packages centred on doing planar windings?I have dont a lot of research but drawing blanks.....i typed my spec into Customplanar.com and they are now offereing me a "meeting".I cant seem to get quotes anywhere.BTW, our spec isvin = 24-32vvout = 30V,Pout = 400WF(sw) = 250kHzIsolation to 1500Vrms
LPKF ProtoMat s104 Stopped   - Page 1
Forum section: electronics / general

author: basheer
author_rank: Newbie
timestamp: August 18, 2022, 07:11:56 am
content: My LPKF protomat s104 hang while tool adjustment...please let know if anybody knows to how to fix it?Thanks and Regards

author: MR
author_rank: Regular Contributor
timestamp: August 18, 2022, 05:03:57 pm
content: Get a Multimeter and check the controller down the road?- Power available?- Spindle still workable?- some LEDs active?I don't think this toy is rocket science, I'm using my CNC mill occasionally for milling small breakout boards.

author: calvinlove0
author_rank: Contributor
timestamp: October 12, 2022, 02:49:50 pm
content: As a S104 user myself...I'm sorry...this was a bad purchase. I suspect you've already contacted support and they were unable to help you (probably told you to try a different computer).What might work: use a magnet to pull out the tool check dowel. Clean it off and make sure it moves smoothly within the hole.

author: tomgat
author_rank: Regular Contributor
timestamp: October 17, 2022, 05:17:56 pm
content: Quote from: calvinlove0 on October 12, 2022, 02:49:50 pmEasy now... I truly love my LPKF S103 and have made hundreds of boards with it, but I would agree that these machines not a "point and click". To make them reliable, you have to truly understand how the machine works end to end. I dont know specifically about the S104 Jager spindle, but I know the S103 Jager spindle extremely well and know they have a spindle rocker retractor arm is prone to not fully retracting down releasing bits. The reason is because of the bolt they picked being too small and cant handle the repeated pressure over time. I had endless intermittent issues with tool changes until I modified mine adding a more rigid design.
Per Placement Costs USA, Shenzhen, Mexico - Page 1
Forum section: electronics / general

author: radiostuff
author_rank: Contributor
timestamp: October 17, 2022, 04:11:01 pm
content: I do production runs of about 1000 boards in Shenzhen. From small assembly houses, the market price per placement is about a half-cent (USD). The low-end of US-assembly, which I priced 12-months ago, was 10-cents per placement. Does anyone know how anything about Mexican assembly houses and their per-placement prices? Are they usually located in a particularly part of the country?
Crusty ChipQuik - Page 1
Forum section: electronics / general

author: mcinque
author_rank: Unknown
timestamp: October 15, 2022, 07:57:27 pm
content: Hello, I found my unused ChipQuik very crusty.It has at least 4 years.Is this something dued to humidity or it's the alloy that is suffering of some sort of metal migration/oxidation?

author: wraper
author_rank: Unknown
timestamp: October 15, 2022, 08:02:14 pm
content: Probably something similar to tin pest.

author: Kean
author_rank: Unknown
timestamp: October 15, 2022, 09:24:37 pm
content: The same happened to my older leaded ChipQuik removal alloy (SMD4.5) which I bought about 10 years ago. In fact mine looks much worse than yours, and it is totally covered in that oxide. It started to go "bad" probably just a few years after I bought it.I bought a newer batch of the unleaded alloy (SMD4.5NL) in 2017 which is still fine.
LPKF Multipress 6/8 layer pcb stack up - Page 1
Forum section: electronics / general

author: tomgat
author_rank: Regular Contributor
timestamp: October 06, 2022, 08:01:22 pm
content: I acquired a used LPKF multipress, and have been pretty impressed with it doing 4 layer boards. I can now reliably make 4 layer boards in a couple hours using it with their Contact S4.However, there appears to be no documentation on doing 6 and 8 layer stack ups. Anyone out there every tried doing this? The multipress doesnt use press pins, so any idea how you align the 2 core layers?Any comments are appreciated!
Anyone got machines from UIC? I'm confused how platform validation works - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: October 05, 2022, 01:13:46 pm
content: I'm using dual lane gold feeders but when I scan the barcode it just goes blue, never gives me an error or a green validation. When I put in a feeder it pops up the right part number, and the barcode scans in the log, but they never validate. I've tried holding in the PSV tabs but I have no real idea what I'm doing... There's a flip card thing of slot / track numbers attached to the front of the machine, so maybe it's set up to use them instead of the tabs? I'm not sure how to use them and the docs don't seem to mention that alternative way.
Issue with Zprobe and arduino shield - Page 1
Forum section: electronics / general

author: techninja80
author_rank: Regular Contributor
timestamp: September 28, 2022, 01:13:32 pm
content: So I picked up one of those red protoneer arduino shields, and uploaded Grbl 1.1 on the arduino. I have attempted to try the Z probe by putting the wire on scl, and one, and ground and tried to trigger it manually by just touching the wires together, but it does not trigger. As I understand it should be just looking for a change I would assume to ground. But when I probe the scl pin its low on volts. Is anyone familiar with how to do this.. Every thing I see on the internet says this should work. but its not for me. So I know my dumbass is doing something wrong.

author: Kean
author_rank: Unknown
timestamp: October 02, 2022, 02:51:03 pm
content: From memory I've only used probing with grbl running on a Mega with my own custom shields. I think I have a Protoneer shield here somewhere but not used it.There should be an internal pullup enabled on the probe pin which by default is A5 on ATmega328.Are you using a G38.x command to start the probing move?Check you don't have inverted probe configured via $6, or that you uncommented DISABLE_PROBE_PIN_PULL_UP in config.h.
Migrating a through-hole PCB design to SMD/pick-and-place - Page 1
Forum section: electronics / general

author: amaningd
author_rank: Contributor
timestamp: September 29, 2022, 08:56:52 pm
content: I'd like to change one of my existing through-hole board designs to a mostly surface-mount design that can be assembled by a pick-and-place machine. Up to this point, I've been purchasing the parts myself from Digikey, ordering bare boards from my preferred vendor, and hand-soldering each board. This is getting to be time-consuming as my designs become more involved and I need to assemble multiple boards.I've seen a bunch of Dave's videos on BOM consolidation, design for manufacture, SMD soldering, etc., and I've incorporated these ideas into my existing through-hole design. I've never ordered a board for full assembly by a vendor before, though. I'm wondering what else I should know before approaching the vendor with my Gerber files and BOM, just so I don't look like an idiot...Some of my immediate questions:Since my BOM contains Digikey part numbers and quantities, could I ask the vendor to handle parts procurement/ordering?If one of the parts on my BOM is out of stock (especially during These Times™) and needs to be substituted, how would I inform the vendor of appropriate alternatives? E.g. would this information need to be on the BOM?I hope this isn't too "newbie" of a question!

author: Jackster
author_rank: Frequent Contributor
timestamp: September 29, 2022, 09:19:38 pm
content: Your first PCBA order can be quite daunting, but rest assured that your PCBA house will be able to guide you through any issues.Quote from: amaningd on September 29, 2022, 08:56:52 pm1. Getting the assembly house to order parts for you is pretty common. Most of us actually prefer it. Just give them your BOM and they will order enough plus extra. They might even have those parts in stock ready to go.2. You can give them multiple part numbers. Add an extra column to the BOM and add a note saying substitute components are listed next to the MPN. You can always send an email with more info.

author: loki42
author_rank: Frequent Contributor
timestamp: September 29, 2022, 11:02:07 pm
content: Have a look at services like jlcpcb assembly. Even if you don't continue using them they have some neat stuff for short runs. If you can lay out stuff for the more automated process then the higher cost human ones shouldn't have a problem. Some parts are much more expensive or cheaper in particular regions though so check if you're going for an assembler in another country.

author: peter-h
author_rank: Super Contributor
timestamp: October 01, 2022, 11:58:16 am
content: I would use an assembly contractor who is nearby, so you can pop over easily.Been doing this for 30 years... and I always free issue all the parts.
JLCPCB (confusion with PIMETA2 headphone amp) - Page 1
Forum section: electronics / general

author: 13hm13
author_rank: Frequent Contributor
timestamp: September 27, 2022, 04:15:13 pm
content: I can't seem to get a straight answer from JLCPCB as to whether they can successfully produce this PCB form me.The project is the Pimeta2 headphone amp. And the Eagle files are all in a ZIP file, here:https://tangentsoft.net/audio/pimeta2/dfiles.htmlI can import this ZIP file into JLCPCB. And the various Gerber Viewslookokay.However, below are my Analysis Results.BOTTOM LINE: Am I going get a working PCB from JLCPCB. (I have dealt with them before, with a much simpler project. It had some Analysis issues, too. I created a thread here on EEVBlog about it in 2020. I did get a successful product from JLCPCB.)Quote

author: Kean
author_rank: Unknown
timestamp: September 27, 2022, 04:53:26 pm
content: It is a 4 layer PCB with non-standard gerber file naming - but the linked website states what all the file layers are.So when prompted by the JLC website you should be able to select the right layer for each file and it will likely then be able to detect file.You could also create a new ZIP file with the files renamed using the file extensions recognised by JLCPCB automation.https://support.jlcpcb.com/article/29-suggested-naming-patternsBeing 4 layers you will need to select a stackup in addition the PCB thickness, but for a headphone amp I don't imagine that trace impedance will be critical.

author: 13hm13
author_rank: Frequent Contributor
timestamp: September 27, 2022, 06:38:59 pm
content: Thx!But submitted AS IS, will JLCPCB be able to give me a working board?

author: Kean
author_rank: Unknown
timestamp: September 27, 2022, 06:58:06 pm
content: No idea. I guess you find out soon... but more likely one of their engineers will query the gerbers naming.

author: 13hm13
author_rank: Frequent Contributor
timestamp: September 28, 2022, 07:10:15 pm
content: I need to make another PCB from the same Tangentsoft site:https://tangentsoft.net/audio/ppa/amp2/Note: Download the PPA ExpressPCB Design Files (link on above page)JLCPCB does supposedly upload 100% (and I do see the add to cart and price) But I cannot see the Viewer or Analysis Results page.How does one import an ExpressPCB zip file into JLCPCB?

author: thm_w
author_rank: Super Contributor
timestamp: September 29, 2022, 12:31:13 am
content: Quote from: 13hm13 on September 28, 2022, 07:10:15 pmhttps://www.expresspcb.com/

author: 13hm13
author_rank: Frequent Contributor
timestamp: September 29, 2022, 05:39:10 pm
content: Yeah… and you pay for the “Express “ service, too. I assume there’s no converter to Gerber tool??
Where can I get QR / barcode labels for the PCBAs? - Page 1
Forum section: electronics / general

author: Calder
author_rank: Contributor
timestamp: September 27, 2022, 01:22:48 pm
content: We have been printing our own labels, but the ink on them do not last (at all). Any recommended brand of labels (up to 2x1 inches)? The numeration on them is not important, as we only need to keep an internal log of them once inspected.Is there any brand capable to sustain the reflow oven temperature?Thanks!

author: Jackster
author_rank: Frequent Contributor
timestamp: September 27, 2022, 01:44:53 pm
content: "Polyimide labels" are what you are after.They can resist something like 300c for 60-90 seconds and have decent wear resistance to last throughout the PCBA and in the customer's hands.There might be some services out there that provide them pre-printed.Had a customer supply some from (I think) Brady.co.uk and they worked well. Looking to get a roll of them myself.Check if your PCBA offers it as a service. Most should offer some level of panel tracking.

author: wilhe_jo
author_rank: Regular Contributor
timestamp: September 27, 2022, 11:06:40 pm
content: I use old zebra printers for my labelling needs.There're a lot of different label types and transfer media.The polyamid/polyester stuff with some resin transfer medium should work for you I, guess.I use the cheapest paper labels with wax stuff right after PCBA. To track testing.My stock is from labelident (they have offices in DE and AT).There's quite some information on their website...73
Metcal BGA 3500 tech data needed - Page 1
Forum section: electronics / general

author: calmissile
author_rank: Contributor
timestamp: September 26, 2022, 08:58:33 pm
content: Need some technical info on Metcal BGA 3500 machine. I have to machine some missing accessories for 2 machines.1. A photo and dimensions of the plate that is installed above the prism. The plate apparently fits on the 2 pins on the right side of the cavity. The manuals imply that they are machined to hold the IC prior to the suction pickup.2. The manuals indicate that the upper optical calibration plate is to be placed in this same area however the calibration plate shows 2 holes for pins that are diagonal rather than on the right edge. Note, I have the vice like fixture that hold the IC's. It fits on the 2 existing pins on the right side. It would appear that perhaps there is a plate missing that fits over the 2 existing pins and contains 2 pins in a diagonal configuration to receive the calibration plate. Photos of the factory parts would be a big help.Doug calmissile@gmail.com
Elecrow pcb $1 promo - Page 1
Forum section: electronics / general

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 23, 2022, 04:20:03 am
content: Just found the promo atElecrow, the usual 100x100mm 5pcs dual layer PCBs for $1.$5.70 shipping to Spain, I doubt it'll vary a lot between countries.
instockcomponents.com - reputable? - Page 1
Forum section: electronics / general

author: jmelson
author_rank: Super Contributor
timestamp: September 15, 2022, 12:09:01 am
content: I need to get some Xilinx CoolRunner II chips. Instockcomponents.com claims to have them for a good price. Has anybody used them?Did you have a good experience?Thanks,Jon

author: Kean
author_rank: Unknown
timestamp: September 15, 2022, 12:48:38 pm
content: Never heard of them, but their name kind of suggests dodgy business practices.A site for checking on potential alternate suppliers that was suggested to me by my rep at a large distributor washttps://www.supplierblacklist.com/Not a lot there, and nothing matching your potential supplier, but it could be quite a promising tool if only more people made use of it.

author: jmelson
author_rank: Super Contributor
timestamp: September 15, 2022, 08:26:08 pm
content: Utsource had the same part for less than half the price. I have bought from them before with good results.Thanks,Jon

author: wraper
author_rank: Unknown
timestamp: September 15, 2022, 08:49:59 pm
content: Website has feel of dodgy and they have another clone of it, which you can see not changed in contactsCircuitsTransistors.com. However phone number apparently has a real company behind it: Shenzhen Chongsheng Electronics Co., Ltd.

author: wraper
author_rank: Unknown
timestamp: September 15, 2022, 08:58:32 pm
content: Here is another contact sales@allcomponents.net with dead domainhttps://www.circuitstransistors.com/index.php?route=information/information&information_id=6which was not renewed and expired.https://who.is/whois/allcomponents.net

author: jmelson
author_rank: Super Contributor
timestamp: September 21, 2022, 01:38:29 am
content: Quote from: jmelson on September 15, 2022, 08:26:08 pmAnd, after ordering from Utsource, at their listed proce of $3.00, they tell me they want $10 each.Grumble, the old bait and switch!Jon

author: wraper
author_rank: Unknown
timestamp: September 21, 2022, 08:59:58 am
content: Quote from: jmelson on September 21, 2022, 01:38:29 amUtsource does not stock their own components AFAIK, maybe some most popular ones. Also a lot of them are sold by third party sellers and Utsource acting as marketplace. So nothing surprising for some component with poor availability.

author: Whales
author_rank: Super Contributor
timestamp: September 21, 2022, 11:31:54 am
content: Quote from: jmelson on September 21, 2022, 01:38:29 amI recently read that this is commonplace:https://www.bigmessowires.com/2022/09/15/semiconductor-shortage-and-business-threat/Quote

author: jmelson
author_rank: Super Contributor
timestamp: September 21, 2022, 03:55:26 pm
content: Quote from: Whales on September 21, 2022, 11:31:54 amYup! I had a good experience with UTsource earler this year, they delivered 100 pieces of an IR FET driver quickly, with no games. But, then, on this order the games are on.Jon
Selecting vibration dampeners for light-weight electronics product - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: September 19, 2022, 05:57:47 pm
content: Hi all,We have a small 8 x 5 x 2 cm electronics data logger, weighing 150 G (aluminum enclosure with mounting flanges).The device is frequently installed in automotives, incl. cars, motorsports, forklifts etc. - all of which may exhibit either light or heavy vibration.To help our end users 'dampen' the vibration, we'd like to offer a recommended set of screws and vibration dampeners for use with the flanges (which has M3 size holes).We've looked at dampeners like the below:https://www.tme.eu/en/katalog/vibration-dampers_112550/?mapped_params=205%3A1470108%3B532%3A1448207%3BHowever, we are unsure whether to go for a solution that is e.g. 70N or 24N. Can anyone help provide some guidance on what a reasonable level would be for our type of product/weight/use case?Thank you.Martin