hybridfree/eevblog-posts huggingface dataset:
Source of Solderable Polyurethane Coated Copper Wire - Page 1
Forum section: electronics / general

author: iMo
author_rank: Super Contributor
timestamp: April 23, 2025, 09:11:47 pm
content: Years back I got a red "Solderable Polyurethane +150°C Copper Magnet Wire 0.2mm dia" from aliexpress.I wanted to do the same as some makers show in their videos - after a second or two the end of the wire gets soldered nicely.My wire gets soldered too, but it takes around 7-8 seconds, and that is too long, imho.Either my wire is too thick, or the insulation is not made of the low temperature polyurethane, or my 75W Weller iron is too weak..What is your experience with this kind of wires? Any hint on a reliable source of such "magic" wire?

author: TimFox
author_rank: Super Contributor
timestamp: April 23, 2025, 10:58:05 pm
content: I have had good luck with "Poly-ThermalezeTM" and "Beldsol" magnet wire.https://www.interstatewire.com/magnet-wire-config.htmlWhen we used mass quantities of this, and especially with Litz wire, at work, we found a solder pot useful for tinning the end.

author: thm_w
author_rank: Super Contributor
timestamp: April 23, 2025, 11:08:15 pm
content: Discussed here but I haven't tried the products:https://www.eevblog.com/forum/chat/aliexpress-jump-wire/https://www.eevblog.com/forum/reviews/insulated-thin-wire-for-pcb-repair-interconnects-trace-fix-etc/

author: iMo
author_rank: Super Contributor
timestamp: April 24, 2025, 09:48:53 am
content: AI told me me to search for "Class 130 Solderable Polyurethane-Polyamide Enameled Round Copper Wire UEW", or "Polyurethane Enameled Copper Wire Solderable UEW Self Bonding Wire"There are several Heat Resistance Grades: 130°C (B Class), 155°C (F Level), 180°C (H Level)also sometimes marked UEW/130. UEW/155, UEW/180.I bought the "155C" one, so perhaps I have to try with the 130C one, also 0.15mm diameter may work better. I need it for wiring digital logic, and it has to be tinned fast..
AOI Omron RNS-PT still useable? - Page 1
Forum section: electronics / general

author: rfe1
author_rank: Contributor
timestamp: February 26, 2025, 08:09:50 pm
content: HiI would have the opportunity to get my hands on a desktop AOI.It's an Omron RNS-PT from that's about 20 years old.There is an error message that there is an obstacle in the safety area.Does (or did) anyone use this kind of AOI and knows if it is worth the work to get the machine running again or is it so outdated that it doesn't make sense to use it at all?I would like to inspect small batches of PCB's with that machine so time is not that crucial.I assume the Cameras and Software made huge leaps in the last years but it might be enough for my purpose.Maybe someone could even help me with clearing this error, I already checked the light grid works properly and there is no obstacle in the area.Thanks in advance

author: SMTech
author_rank: Frequent Contributor
timestamp: February 27, 2025, 02:28:58 pm
content: should probably ask over on SMTnethttps://smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=16127&#Message66202

author: loki42
author_rank: Frequent Contributor
timestamp: February 28, 2025, 10:18:16 am
content: I've had a look at the older Omron gear as they've come up a few times cheap. The interface is pretty scary. They are good machines that actually work well. Also Omron has actual Omron people in lots of countries so you don't need to deal with a dealer for support (which i hate). I'd look for newer 3d machines though as they are a lot easier to program and often come up super cheap at auctions. I got mine for almost nothing and there were 3 decent Omron machines at that auction and 3 cyberoptics. I bought 2 of the cyberoptics.

author: rfe1
author_rank: Contributor
timestamp: March 04, 2025, 07:34:31 pm
content: Ok so I think it's not really the right machine for my purpose, thanks for your help.I read the thread about the AOI that is running at the moment for a suggestion for an AOI and I think this will help me find the correct useful machine for me.

author: lu1s.p
author_rank: Contributor
timestamp: April 22, 2025, 07:47:02 am
content: I've worked with AOI systems over the years, some of them quite old, and honestly, if the optics are in good shape and there are no major mechanical issues, you can still get decent results out of them.That said, what's really important these days isn't so much the machine itself, but the software you can run behind it. I've seen setups where old AOIs are reused just as image capture platforms, while all the defect detection is handled by modern systems that can spot issues those machines were never originally designed to catch.It also depends a lot on the kind of products you want to inspect. If it's just standard PCBs, they might do the job. But if you're dealing with plastics, mechanical assemblies, or more unconventional parts, then you’ll definitely need something more flexible.
Glue for PTH connector housing? - Page 1
Forum section: electronics / general

author: Mark
author_rank: Frequent Contributor
timestamp: April 22, 2025, 01:51:59 pm
content: We're having a problem with a 10pin connector housing that pulls off the PCB after repeated use:It is Molex 79107-7004 (2mm 02X05 3MM TAIL THRU-HOLE).It mates with a shrouded connector.As you can see, some pins of the connector are removed (to give some extra isolation distance).Can you suggest a suitable glue for the connector housing? The factory have Loctite 404 but that just seems like normal superglue, it might be best with a glue that is somewhat flexible?Thank you.

author: thm_w
author_rank: Super Contributor
timestamp: April 22, 2025, 09:51:29 pm
content: Thin glue can wick into the contacts and cause issues.Thicker glue could be used on the sides but its not clear if there is space from the connector housing to the PCB when the connector is plugged in to give enough strength with a flexible glue like silicone.Maybe you can try loctite 410 or similar?

author: jpanhalt
author_rank: Super Contributor
timestamp: April 23, 2025, 12:39:29 am
content: Super glue (cyanoacrylate, CA) adheres well to PCB and most plastics. So does a slow cure epoxy. If gap filling, I prefer epoxy, and if the gap is large, I add fumed silica to make it more like catsup to peanut butter.An important step is to be sure both surfaces are roughened ahead of time, if bonding is poor. (For bare PCB, that may not be necessary.) Nylon bonds reasonably well. Polypropylene and polyethylene are much harder to bond, but teflon can be well bonded by chemically etching it beforehand.

author: coppercone2
author_rank: Super Contributor
timestamp: April 23, 2025, 12:40:21 am
content: I see these come off alot
Need Weller WSD2000 operating instructions, Owner's, parts, or service manual - Page 1
Forum section: electronics / general

author: mkinn
author_rank: Contributor
timestamp: April 08, 2025, 11:58:36 am
content: Looked on Google, Bing, Ask, Internet archive, etc, no luck. Just bought a NOS Weller WSD2000, but no literature, no pedal, no corded remote, no accessories. All I could find were descriptions in old catalogs. Is there somewhere else I could look/download/pay/borrow/rent a .pdf or a paper copy?My dad had one, and I'd like to get this one going soon in his memory. I teach at local voc school and the Geeksquad. This has no CPU, it's analog with knobs on the front. If there's an EMP proof version, this is it. (for all those preppers out there) You can use argon or other inert gas to dispense flux, etc. from an air nozzle on back. Made in Germany, it uses the regular 7 pin screw-on attachment for an HAP1, WTA50 or WMRT tweezers, WSP80 iron, etc., and two front vacuum/air filters for a WVP or similar vacuum pickup pen, and rear connectors for the footswitch and corded remote. If anyone has and wants to sell any of these accessories, please PM me. Thank you.

author: mkinn
author_rank: Contributor
timestamp: April 08, 2025, 12:06:52 pm
content: Quote from: mkinn on April 08, 2025, 11:58:36 amSorry, it's a WRS2000

author: mkinn
author_rank: Contributor
timestamp: April 12, 2025, 06:59:01 pm
content: Also, need the footswitch if anyone has one, but at least the wiring diagram for the footswitch, and also the schematic for the entire workstation for the WRS2000. Thanks!
How to clean up chip quick? - Page 1
Forum section: electronics / general

author: djc6
author_rank: Newbie
timestamp: April 06, 2025, 03:19:54 am
content: I am a hobbyist, I am trying to restore two old Macintosh SE/30 computers.Both have the same fault with leaking capacitors damaging an SOIC package chip on the board.I used "Chip Quik REM4.5 SMD/SMT Chip Removal Alloy" to easily and quickly remove the chip from the first board, but I spent a looong time trying to remove the chip quick blob from the board afterwards. Soldering on the new chip was easy and the repair was a success.What is a good technique to clean up the aftermath when I tackle the 2nd board? I have some "MG Chemicals 425-LF Desoldering Braid #3 Fine Braid Super Wick" but the chip quick blobs didn't really stick to it.

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: April 06, 2025, 08:15:04 pm
content: Solder sucker. Get the alloy hot (it stays liquid a "long" time) and suck it up. Cleanup with fresh solder wick as needed.

author: wraper
author_rank: Unknown
timestamp: April 06, 2025, 08:24:16 pm
content: Add some flux, it will help with wicking a lot. Also after you remove desoldering alloy, apply normal solder and remove it again to minimize solder contamination.

author: djc6
author_rank: Newbie
timestamp: April 16, 2025, 01:28:17 pm
content: Quote from: Rat_Patrol on April 06, 2025, 08:15:04 pmThanks, this was the answer. A 30 year old plunger-type solder sucker from Radio Shack made quick work of the Chip Quick blob. I forgot I owned one! Mac SE/30 repaired and working.

author: Kean
author_rank: Unknown
timestamp: April 16, 2025, 02:03:22 pm
content: The solder wick should work fine too. I often use wick with ChipQuik lead free removal alloy and have no problems. You might just need to add a little flux, and use a fairly long segment of wick.By all means use a plunger solder sucker to remove the bulk of any solder, but I'd still use wick plus flux to clean the pads of anything remaining. I like tacky flux, currently using ChipQuik SMD491.Then add your normal solder, and remove that again as suggested by wraper to help get rid of remaining alloy. Finally cleaning with IPA before soldering the replacement part.
Buy western brands Lithium cell in small quantity? - Page 1
Forum section: electronics / general

author: Wilson__
author_rank: Frequent Contributor
timestamp: April 10, 2025, 07:22:21 pm
content: Where to buy western brandsLithium ion/polymer pouch rechargeable cellin small quantity production runs?Brands like Panasonic, Samsung, LG Energy Solution, Samsung SDI, Toshiba Corporation, etc. with full safety certification, IEC62133-2, UL1642, UN38.3.For two cells,around 150 mAh, max discharge 200mA1000mAh, max discharge 500mA

author: jduncan
author_rank: Regular Contributor
timestamp: April 10, 2025, 09:01:46 pm
content: Didn't know Korea and Japan were considered the "west" now.

author: thm_w
author_rank: Super Contributor
timestamp: April 10, 2025, 09:56:06 pm
content: Any way you can use a cylindrical cell? Might be easier to source.Probably hard to find something custom, if you can find an existing product that uses one of those cells then buy a genuine replacement that would be an option. eg samsung watch, etc.these are non genuine thoughhttps://www.replacebase.co.uk/samsung-watch-batteryhttps://www.battery.uk.com/UK-Battery-Ltd-Samsung-Galaxy-Watch-Active-Compatible-Replacement-Battery-CS-SMR500SH.html

author: Wilson__
author_rank: Frequent Contributor
timestamp: April 10, 2025, 10:49:14 pm
content: Quote from: thm_w on April 10, 2025, 09:56:06 pmMany thanks. The repair tools/parts company web looks interesting and has grow to quite high staff head count.yes, if the cylindrical cell has build-in permanent 'spot welded' legs that can be soldered on PCB. Cell holder with spring loaded contacts are a bit less reliable and take up space and weight.

author: thm_w
author_rank: Super Contributor
timestamp: April 11, 2025, 12:21:48 am
content: Yes just add "with tabs" or "tabbed" to your search.So "14500 tabbed cell" should give a few results.https://www.ebay.ca/itm/195326577200
Your experience on small batch manufacturing of hobby project - Page 1
Forum section: electronics / general

author: Wilson__
author_rank: Frequent Contributor
timestamp: April 08, 2025, 03:16:05 am
content: What was your experience on getting ahobby project to manufacture in small quantity?1. For chips. For first few engineering prototypes, Mouser and Digikey are proper and reliable. What other sources areproper and lower price for twenty units. Parts need to have proper datasheet and reasonably recent manufacture-date-code. Is LCSE good?2. Mouser and Digikit do not really have the below items.Where is a proper source? Not fake or surplus old stock that are of questionable quality which is adequate for one-time hobby use but not good enough for twenty machine build that is expected to have a normal operation life of multiple years.a. LCD display, size 1 to 3 inchesb. Lithium cellc. Push button, switchd. Socket, connector, cablee. LED, R, C3. TaoBao has these components. I believe there are many sellers aim at hobby quality.Will sellers who have three Gold Crowns rating good for the above said purpose?Is there a web site that are aimed at "professional business users"?
Making cables properly - Page 1
Forum section: electronics / general

author: jduncan
author_rank: Regular Contributor
timestamp: April 06, 2025, 12:19:47 pm
content: I'm crimping some cables with molex connectors on the end.The transition from the thick bundle insulation to the small individual wire seems like a weak point - the thick cable has a large bend radius and the connector flops around, seems like it would break the small wires. I tried adding heatshrink but that doesn't seem like much of an improvement.Looks like some cables fix this with overmolding, but I assume that's only an option for very large volumes - is there some other technique to solve this? Or am I overthinking it and it's fine?

author: voltsandjolts
author_rank: Unknown
timestamp: April 06, 2025, 12:23:33 pm
content: Just fit it in such a way that it won't flex and it'll be fine.Prevent cable movement near the connector.For example, use cable tie or rtv to ensure the cable doesn't move...if required.

author: thm_w
author_rank: Super Contributor
timestamp: April 07, 2025, 09:21:10 pm
content: It entirely depends on where and how it is used.It is a weak point and after thousands of bends it will break. But if you only install and remove it a few times it will be fine.If this is low volume you can use hot glue or silicone as a strain relief.
Video of segment LCD manufacturing process - Page 1
Forum section: electronics / general

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 16, 2025, 11:38:02 pm
content: Surprising amount of manual work.

author: Bud
author_rank: Super Contributor
timestamp: April 16, 2025, 11:43:25 pm
content: Coming to your favourite US city soon

author: daisizhou
author_rank: Super Contributor
timestamp: April 17, 2025, 02:03:23 am
content: Incredible glass art
JLCPCB aluminum PCB question - Page 1
Forum section: electronics / general

author: rhkean@gmail.com
author_rank: Newbie
timestamp: April 07, 2025, 04:23:49 am
content: I know JLCPCB offers 1-layer aluminum PCB's. and allows for a minimum 1mm drill for through holes.I'm curious if you can define a 1mm via and treat the bottom layers as a ground plane.thanks in advance.-rob

author: Kean
author_rank: Unknown
timestamp: April 07, 2025, 05:01:38 am
content: No, they don't support that.Aluminium PCBs can only be single layer. It isn't possible to electroplate a connection between the top layer copper and the core aluminium.https://jlcpcb.com/blog/new-arrival-aluminum-pcb-boardsTheir copper core PCBs can almost do what you want, but it is intended for heat sink connections only, not electrical connections. So you can have connection between heat sink pads but you cannot have any top layer copper connecting to the heat sink copper. And no plated vias, but I guess you could solder your own wire into a hole. I'm not actually sure how they fabricate these copper core PCBs, but I think it is like rigid flex process.https://jlcpcb.com/blog/JLCPCB-Direct-Heatsink-Copper-Cored-PCBs-Available-Now!
Elecrow PCB - Page 1
Forum section: electronics / general

author: axeonic
author_rank: Contributor
timestamp: April 02, 2025, 06:07:49 am
content: Hi,Has anyone had experience using Elecrow's PCB and assembly service?Thank you for any input, appreciated.TonyAme

author: Smokey
author_rank: Super Contributor
timestamp: April 02, 2025, 06:57:50 am
content: They were my go to shop for cheap pcbs before jlcpcb took off. Still occasionally get some boards from elecrow. They always work so far.Never used their assembly.

author: tszaboo
author_rank: Super Contributor
timestamp: April 02, 2025, 07:54:48 am
content: Yes, both. PCBs are what you expect, though I don't like that they used very glossy soldermask.Assembly was OK, I used them twice for a project. You need to send them files and they give you a quotation in a day or two. They got every part, and the PCBAs turned out OK, working.
April Global Sources Electronic Components magazine (PDF) - Page 1
Forum section: electronics / general

author: mon2
author_rank: Frequent Contributor
timestamp: April 01, 2025, 01:34:47 pm
content: Removing the link. Apparently being bitched at by someone thinking I am spamming.Enough of this site. Good luck.

author: Halcyon
author_rank: Unknown
timestamp: April 02, 2025, 02:10:35 am
content: As discussed with you privately, there is no need to remove links on this occasion. This post was flagged and I'm satisfied that you're posting based off your own experiences and knowledge. For the benefit of those playing along at home, we've had instances where forum users have been approached directly by Chinese companies, requesting that they post links to their products/services in order to circumvent the forum rules on advertising/spam. Some spammers are getting craftier and modifying their techniques.I looked into it and didn't uncover anything adverse in relation to the posts by mon2. That's all it was.

author: EEVblog
author_rank: Unknown
timestamp: April 02, 2025, 03:48:48 am
content: Quote from: Halcyon on April 02, 2025, 02:10:35 amUnfortunately true. One company even advertised on a paid contract job website for existing established EEVblog forum members to post commercial links, and many of the regulars here know this. So there is unfortunately bound to eventually be some false reporting.

author: Whales
author_rank: Super Contributor
timestamp: April 02, 2025, 06:53:35 am
content: I want to give this vendor a fair assessment, butStrike 1: They have a newsletter. This immediately tweaks my nose.Strike 2: When I google for this thread's title I get a broken website:Strike 3: When I go to their front page I see "World-class Al, innovation and lifestyle sourcing"Looking around a bit it seems they're an Alibaba competitor. They're probably just as shit and spammy as the rest of these platforms.I don't know OP's original message so I don't know if it was just a link to their newsletter or an actual query/story about the site
I'm looking for multitroniks mx920 manual - Page 1
Forum section: electronics / general

author: ILIKEMACHINE1500
author_rank: Newbie
timestamp: March 30, 2025, 11:40:17 pm
content: I found a multitroniks mx920 that turns on but I can't find a manual. Does anyone have the multitroniks mx920 manual? [ Specified attachment is not available ]
Does anyone make a solder paste dispenser like this but in aluminum? - Page 1
Forum section: electronics / general

author: Hootis Tigglebits
author_rank: Contributor
timestamp: March 28, 2025, 10:27:13 pm
content: I love these solder paste dispensers, but the part that surrounds the zinc plated barrel that the bolt goes through is prone to breaking when using really small gauge applicators. Has anyone seen one similar to it but made out of aluminum? I've searched all over and haven't came up with anything other than a really bulky dispenser that looks like a mini caulk gun.https://a.co/d/b2npa1O

author: thm_w
author_rank: Super Contributor
timestamp: March 28, 2025, 11:10:28 pm
content: If you use it that much, have you considered trying a pneumatic dispenser?This looks interesting but probably not that powerful:https://www.aliexpress.com/item/1005008384498316.html
OK Industries MTR 5000 Owners/User manual - Page 1
Forum section: electronics / general

author: mkinn
author_rank: Contributor
timestamp: March 21, 2025, 02:13:00 am
content: I have searched the entire internet, and cannot find a manual for this Hot Air Rework station. Member KBrill has a copy he scanned, but I can't PM him yet, new member. I was hoping someone had a PDF they downloaded somewhere, Or a copy for sale. I have ayPal, Visa, etc. Purchasing one off eBay.

author: Hootis Tigglebits
author_rank: Contributor
timestamp: March 28, 2025, 10:30:42 pm
content: Shoothttps://www.metcal.com/an email. That's what I did when I needed the manual for our OK Industries MTR 2000 and they emailed it to me.
Fairchild/OnSemi 3 char datecode format - Page 1
Forum section: electronics / general

author: aeccles
author_rank: Newbie
timestamp: March 25, 2025, 02:29:27 pm
content: I have some 2N5210BU transistors with (what I think is) datecode K40.Does anyone know how to decode this?

author: SMTech
author_rank: Frequent Contributor
timestamp: March 25, 2025, 04:25:36 pm
content: No, they don't want you to know. The datecode, along with the other markings are things the counterfeiters can get wrong if the information on how to verify them is not in the public domain.

author: mtwieg
author_rank: Frequent Contributor
timestamp: March 28, 2025, 07:55:21 pm
content: Yeah that is the new normal now. If the format is public then that makes it much easier for counterfeiters to imitate them.
Xgecu T76 - Page 1
Forum section: electronics / general

author: gearik
author_rank: Newbie
timestamp: March 23, 2025, 08:16:50 am
content: Hii just bought a Xgecu T76, thought it could read most of my chip, but unfortnaly im unable to read an important ic (i know i should have researched abit more)is there a way to create a custom chipset based on the ic's documentaion and perhaps make it work?the ic im trying to read is AT89S52any help would be greate

author: voltsandjolts
author_rank: Unknown
timestamp: March 23, 2025, 11:23:39 am
content: AT89S52 is supported on the T56, T48 and TL866http://xgecu.com/MiniPro/T56_List.txtLooks like you need to wait for it to be added to T72http://xgecu.com/EN/Index.htmlQuote

author: MAS3
author_rank: Regular Contributor
timestamp: March 23, 2025, 11:25:02 am
content: Hi and welcome.As i already suspected this, reading page 1 of thedatasheet (click !), you'll find this feature:Quote from: datasheetA halfway smart developer, would have set the bits as described in paragraph 17 of the datasheet (which is on page 20).In that case you'd need to destroy the chip to get to it's contents (with small chance of success), and get a hold of another chip to program that with your altered code.

author: gearik
author_rank: Newbie
timestamp: March 23, 2025, 03:11:41 pm
content: Thanksapperantly my googeling skills is at lvl 0

author: gearik
author_rank: Newbie
timestamp: March 23, 2025, 03:23:01 pm
content: meh, thats just evili already bought 10 blank ic's, my plan is to make copies of the original one. im im able to i will save tons of money not needing to buy new preprogrammed ic's from manufacturer.Thanks for pointing this out
Steady Hand Tool - Page 1
Forum section: electronics / general

author: halfmarble
author_rank: Newbie
timestamp: March 10, 2025, 03:30:41 pm
content: hi All,For those who are looking for a little help when placing SMT components I would like to announce Steady Hand Tool. It is a simple, fully mechanical PNP tool.Please check it out and support it here:https://www.crowdsupply.com/halfmarble/steady-hand-tool

author: squadchannel
author_rank: Frequent Contributor
timestamp: March 10, 2025, 03:35:43 pm
content: Just watched a minute of the video and wanted it.mod:I think tweezers would work well, but best would be to use a suction cup/pump to pick it up. like a PnP machine.

author: phil from seattle
author_rank: Super Contributor
timestamp: March 15, 2025, 08:15:17 pm
content: Looks very interesting. Your page doesn't have pricing yet - care to give a ballpark range? At $1000, I'm out. $50 would be a no brainer (he says wishfully thinking...).  I did eventually find pricing. Will probably order one when available.Is there a way to increase/decrease the dampening (resistance?) on the arm? Also, I couldn't tell if there are holes to allow the base to be screwed down. Not sure if I would need them but worth having the option. Are you thinking about some sort of mounting system?Finally, good on you for supporting the Fox foundation. We give to them annually. In this age when research funding is getting whacked indiscriminately, they are a shining light. My wife was diagnosed with early onset PD about 10 years ago.

author: phil from seattle
author_rank: Super Contributor
timestamp: March 15, 2025, 08:20:17 pm
content: Quote from: squadchannel on March 10, 2025, 03:35:43 pmTotally agree. A least, add a couple of clips to run tubing for the vacuum line. A big win would be a vacuum pen with several nozzles for different size ICs. Probably not 402s but 603 and up would be awesome. Maybe an add on kit.

author: mtwieg
author_rank: Frequent Contributor
timestamp: March 17, 2025, 08:47:02 pm
content: Looks pretty slick!The main issue I can see is that I would want to use this along with a microscope, or a hot air gun, which would need to be directly above the component to work properly. Would be great if this could hold the tweezer at a 45 degree angle (like a person would hold it).

author: PlainName
author_rank: Super Contributor
timestamp: March 17, 2025, 08:58:48 pm
content: QuoteThat was my thought too (after wanting one, of course). Perhaps a mount for a camera (as found on a microscope, not the 10000x pen style) would solve that.
Has anyone purchased from stirri.co.uk? - Page 1
Forum section: electronics / general

author: NE666
author_rank: Frequent Contributor
timestamp: January 10, 2025, 11:01:16 am
content: ++[NOTE: My apologies for double posting, I mistakenly created this in the Mechanical Eng. section originally. Mods, please feel free to delete that instance]++My current understanding, largely informed by posts here, is that STIRRI is a relatively new company, founded by some staff formerly of Amtech.I placed a small order with them in late December, via their UK store front. All items were shown as being in stock at the time (and still are, as of today), and at checkout the delivery option offered was 48 hour postal service. Fast-forward to yesterday, and my order status still shows as "confirmed", so I contacted them via the email address on the site. They responded within a few minutes, to say that there was currently no UK stock of those items, that they couldn't provide an ETA and would I care to wait on the order?Not that impressed. Has anyone else placed orders with them recently, and had them fulfilled?It's a low value order, and not required urgently, so it's an option to be patient. The products seem to enjoy a good reputation, and are very reasonably priced. However, this experience feels like a yellow flag, and I'm wondering whether I'm dealing with a small start-up company that is struggling and/or circling the drain, and so whether I should have my credit card company perform a chargeback now.

author: Gyro
author_rank: Super Contributor
timestamp: January 12, 2025, 02:26:59 pm
content: Go back and use the 'Report to Moderator' in the bottom right corner and ask nicely. The Mods don't routinely trawl for such stuff.

author: NE666
author_rank: Frequent Contributor
timestamp: March 10, 2025, 12:42:37 pm
content: Quick follow up, lest it should help anyone else.My order never arrived. Early Feb. I received an email to say that the ordered items weren't in stock in the UK and would I accept a substitution from US stock (which I did). To this day, I've heard nothing else from them, nor received any products. I'm now seeking a refund.At the time I was told there was no stock, the .uk storefront still didn't reflect that.One to avoid, in my experience.

author: NE666
author_rank: Frequent Contributor
timestamp: March 12, 2025, 09:13:27 am
content: Final update:Stirri US replied to my chasing email within a couple of hours. I'd asked them to cancel my order and told them I expected a full refund within 48 hours. Both were forthcoming, as was an apology, and promises of improvements in their order processing and stock control.Final conclusion, to paraphrase Halon's razor, is; "Never attribute to malice that which is adequately explained by ineptitude."
do RF PCB have different copper treatments - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: February 26, 2025, 01:49:06 am
content: Doing research it looks like alot of PCB have a copper oxide layer grown on the copper for bonding to the substrate because glue works better. I think I even saw this before now that I think about it, where the peeled copper from a PCB looked black (I thought it was a type of black glue)For something like a strip line you have RF that is on the underside of the trace, so you would think thats sub optimal to have a oxide layer for bonding.Do RF boards use different technology for adhesion then normal boards? I know they work on the dielectric constant uniformity, but what about the copper itself? i.e. ptfe typeI don't mean ceramic boards, which are totally different to make. The intermediate ones that use basically plastics or fibers.

author: thm_w
author_rank: Super Contributor
timestamp: February 26, 2025, 02:02:19 am
content: https://resources.altium.com/p/types-pcb-copper-foil-high-frequency-design

author: coppercone2
author_rank: Super Contributor
timestamp: February 26, 2025, 02:10:32 am
content: where does this fall into the abovehttps://www.dupont.com/electronics-industrial/circuposit-484.htmli.e.https://www.pcbmachine.com/news/differences-between-brown-oxidation-and-black-oxidation-in-pcb-manufacturing/Altium does not mention oxide, mostly roughness, and some more advanced treatment, but it seems way different then what I read in a few research papers on PCB manufacturing.. infact they seem to say they take measures against oxides, which are adhesion promoterssome of the china ones have youtube videos about blackening the copper also.do they do it some other way for RF stuff?here is pcbway, they do it

author: IconicPCB
author_rank: Super Contributor
timestamp: March 11, 2025, 05:42:49 pm
content: Copper oxide treatment is used to improve adhesion of multi layer PCB layers.Low frequency RF boars FR4 STRUCTURES are not too sensitive to surface roughness.Gigahertz designs often specify surface roughness as it contributes to the performance ( detracts from ) of the whole PCB since surface roughness comes close to altering signal path length ( skin effect path length variations).
Wave Solder Oil - Page 1
Forum section: electronics / general

author: chris2006
author_rank: Contributor
timestamp: March 07, 2025, 12:39:18 pm
content: Hi AllIs there an alternative oil for wave solder machines, its getting difficult to get and the cost is very highJust wondering was there a better alternative thats being used?

author: Jackster
author_rank: Frequent Contributor
timestamp: March 07, 2025, 01:16:13 pm
content: High temp lithium grease.Clean oil off first with brake cleaner.

author: chris2006
author_rank: Contributor
timestamp: March 08, 2025, 11:12:34 am
content: HiThanks for the great adviceCan you recommend the best one to use ?Many Thanks

author: Jackster
author_rank: Frequent Contributor
timestamp: March 09, 2025, 04:24:33 am
content: They are all pretty much the same but WD have some good ones.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2025, 07:06:53 am
content: is there any no-no's for this application that could effect the solder joint quality?

author: Jackster
author_rank: Frequent Contributor
timestamp: March 09, 2025, 11:19:02 am
content: Quote from: coppercone2 on March 09, 2025, 07:06:53 amThis is for the chains and other parts of the machine that require oiling. At least I hope he is not putting oil in the solder...

author: Mangozac
author_rank: Frequent Contributor
timestamp: March 09, 2025, 10:54:49 pm
content: Quote from: Jackster on March 09, 2025, 11:19:02 amActually, that used to be common practice with wave solder machines. The oil sits on top of the solder bath, helping to reduce oxidation/dross. The density of the solder ensures that the oil doesn't end up in the wave/joints.This seemed to go out of fashion some time back and my understanding is that it's a rare practice these days. There is a product called MS2 Dross eliminator but it's very expensive.

author: coppercone2
author_rank: Super Contributor
timestamp: March 09, 2025, 10:58:31 pm
content: Yes its kind of like a flux too apparently some people claimed you can solder aluminum with mineral oil but I had shit results.. but there is a 'under fluid' version of the process for many things.There might be restricted materials. Silicones maybe?I have been meaning to try ultrasonic indium welding under oil (drag ultrasonic wand over molten indium on hot plate). Not sure if it would look better or not work at all, but I have been meaning to try.

author: SMTech
author_rank: Frequent Contributor
timestamp: March 09, 2025, 10:59:51 pm
content: You can get specialist oils that sit as thin layer on top of the molten solder to reduce oxidation. Some machines might keep the wave stage in a nitrogen atmosphere and others such the the venerable Blundell CMS400 use Argon welding canisters to float a layer of inert gas over the top of the solder pot.

author: Jackster
author_rank: Frequent Contributor
timestamp: March 10, 2025, 03:17:51 am
content: Never knew about the oil on the solder. My machine has oil for the chain which is what I thought OP was referring to.SolderKing and BLT have metal inhibitors that work well.
Using laser to make pcb's at home - Page 1
Forum section: electronics / general

author: Veketti
author_rank: Regular Contributor
timestamp: March 08, 2025, 06:13:26 pm
content: I haven’t made PCB’s at home for years as it’s so cheap to get pcb’s from China. However, I recently subscribed to Mr. Carlson’s Patreon and got the files for one of his designs that I was interested in to build for myself. As I already had laser, I wanted to test how could I utilize it in making the pcb. After some googling I found out that it seems it would be possible to etch FR1 pcb’s. But I only got FR4 and that is not working well. Found out that someone etched the resist away with laser.As I had two-layer PCB, I first cut it to size, painted both sides with standard Alkyd enamel paint then etched the paint away by laser. First I had to invert the template images.End results were good. Only challenges were aligning the other side which didn’t make it any easier as I didn’t have better method to cut the pcb straight than hacksaw. Maybe could have cut the pcb by laser, but didn’t test that..

author: RoGeorge
author_rank: Super Contributor
timestamp: March 09, 2025, 07:26:42 am
content: The PCB looks very well!Seen some (relatively) affordable fiber lasers recently, and they appear to be able to vaporize the copper clad directly. Some are so strong they can even be used for metal working as handheld laser welders/cutters.Making PCBs with fiber laserKurokesuhttps://youtube.com/watch?v=-dQzufH8FEQTesting New SUPER LASERS... These will take over the maker industry!Joshua De Lislehttps://youtube.com/watch?v=o_S1d0AYW1s

author: Veketti
author_rank: Regular Contributor
timestamp: March 09, 2025, 02:16:19 pm
content: Yes, it seems it works with FR1 pcb's to etch the copper away. But I think it might not be worth the effort. First of all, need to be very careful with the settings that the last pass is just enough to not burn the PCB substrate. Also some say, it will leave the substrate slightly conductive. FR4 will not work as it easily burn the substrate.I'll add here the steps in Affinity Designer if someone is interested.1. Delete the PCB outline if exists.2. Select all. Layer – Expand Stroke3. Operations - Add4. Remove fill and set stroke width to 0.1pt5. Export as SVG. Export settings: tick “Export text as curves for font independence” Set raster DPI to 96 and in Advanced, use DPI 96 and tick “Export text as curves”In Lightburn:1. Import that created SVG2. Draw pcb outline. -> Now at preview you should see that the correct areas are lasered off.3. Have corner stoppers on table and align outline to the pcb. Write down the xPos & yPos and use the same values for the second side. For this is crucial that you cut the pcb square. Also pay attention to which direction you flip the pcb.In my JPT 60W Mopa M7 fiber laser I used same parameters that I use for painted aluminum business cards which is: Speed 950mm/sec, power 36%, Frequency 23kHz, one pass Bi-directional fill & Cross-hatch
Omron signal relay: safe for ultrasonic cleaning? - Page 1
Forum section: electronics / general

author: danils
author_rank: Contributor
timestamp: March 07, 2025, 06:54:09 pm
content: Hi,I have a PCB with 21 of those relay mounted on it. Model is G6K-2Y-P.The data sheet states that they are washable but it makes no mention if they are safe for ultrasonic cleaning. Omron relay FAQs refers to "individual data sheet to check if they are ultrasonic safe" but the data sheet of the model of my interest makes no mention of it.https://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdfPage 9 just suggests the type of cleaner and the maximum cleaning bath temperature.I asked them via the contact form from my company email but I got no answer.Does anybody know if those signal relays are safe for ultrasonic cleaning?ThanksD.

author: thm_w
author_rank: Super Contributor
timestamp: March 07, 2025, 10:30:38 pm
content: Panasonic says not to:https://industry.panasonic.eu/storage/custom-upload/Components/Relays/ti_relay_soldering_cleaning_guideline_en.pdfThough I've not heard any issues of it myself.edit: Omron specificallys says the part number you need: "Ultrasonic cleanable models are available. (-U type)"
Metcal / Oki PS-900 Schematic  - Page 1
Forum section: electronics / general

author: tridac
author_rank: Regular Contributor
timestamp: February 24, 2025, 04:21:16 pm
content: Hi,Title says it all really. PS-900 power supply died, doesn't power up. Looked inside, but nothing obvious or burned out, so looking for schematic. Any ideas ?.Thanks.

author: quadtech
author_rank: Regular Contributor
timestamp: February 24, 2025, 04:38:49 pm
content: https://www.eevblog.com/forum/repair/metcal-ps-900-soldering-station-heats-up-to-over-400-c/
Through hole component leg cutters - Page 1
Forum section: electronics / general

author: keef46
author_rank: Contributor
timestamp: February 20, 2025, 02:04:53 pm
content: Does anyone know of some good side cutters specifically for cutting off the legs of through hole components. So without a flush cut - which often results in cutting through the solder joint if your in a hurry! Normal electrical cutters sort of work, but are not great.

author: Gyro
author_rank: Super Contributor
timestamp: February 20, 2025, 02:34:05 pm
content: There's a very recent thread on exactly this subject...https://www.eevblog.com/forum/chat/quality-cutters/

author: keef46
author_rank: Contributor
timestamp: February 20, 2025, 03:10:51 pm
content: Seems to be referring to flush cut side cutters.....im looking for something with a bevelled edge.

author: SMTech
author_rank: Frequent Contributor
timestamp: February 20, 2025, 03:43:49 pm
content: You mean like these chaps?https://www.ebay.co.uk/p/23030514426
Camera sensor with phase vapor reflow oven - Page 1
Forum section: electronics / general

author: Prototyx
author_rank: Newbie
timestamp: February 12, 2025, 08:51:26 am
content: Hello,I just made a small serie of 10 board with a sony IMX296 camera sensor. 4 boards are not working.I use a phase vapor reflow oven (Vapor Flow 275). All my components were dry. Unfortunnatly I don't have X-Ray inspection to check if everything is ok under the chip.Is it possible to use phase vapor for such sensors ? I heard that it was complicated for packages that are not sealled.In the datasheet I can't see anything related about not using phase vapor reflow oven. Has anyone had a similar experience? Any advice?Thanks for your help.
Farnell components coming from LCSC - Page 1
Forum section: electronics / general

author: Rectifire
author_rank: Newbie
timestamp: February 09, 2025, 12:23:18 pm
content: Hi All,I often order components from Farnell, Mouser, Digikey etc. But for the hobby, it is cheaper to use sources like LCSC. I use their services often, and not have had any trouble yet, but lately I have seen something really interesting, and I was wondering if anyone else ordering from LCSC has had the same thing.Recently, when unboxing an LCSC package had some parts that came from Farnell, that were relabeled and bagged in LCSC packaging. I know because there is an actual Farnell labeled bag inside the LCSC bag. They ordered at Farnell and resold it at LCSC. Also, this was not one of their marketplace-labeled products. It was an actual LCSC part that came from Farnell. On the Farnell label you can also see a date code that it was ordered at Farnell, which is from about half a year before my LCSC order. So it must have lain in an LCSC warehouse with Farnell packaging for about half a year.I was wondering if anyone else has had this at LCSC before and what could possibly be going on there.

author: Jackster
author_rank: Frequent Contributor
timestamp: February 09, 2025, 12:47:21 pm
content: It is possible that LCSC sourced them from someone else who ordered them and did not use them and ended up selling them to LCSC?

author: Kean
author_rank: Unknown
timestamp: February 09, 2025, 03:42:35 pm
content: Note the logo at the top left of your second image is the logo for element14 China.https://cn.element14.com/en-CNI'm sure LCSC source parts from all over the place based on demand, and sometimes their prices are higher than western distributors.So I suspect Jackster is on the right track, but not something I've seen myself.

author: thm_w
author_rank: Super Contributor
timestamp: February 11, 2025, 10:15:25 pm
content: Quote from: Rectifire on February 09, 2025, 12:23:18 pm"Date code" is the IC production date, not when it was shipped out.It does look like a cancelled PCBA order. Just a bit odd its quantity 10 and they have 55 or 75 in stock:https://jlcpcb.com/partdetail/VishayIntertech-SQS966ENWT1_GE3/C3279471https://www.lcsc.com/product-detail/MOSFETs_Vishay-Intertech-SQS966ENW-T1_GE3_C3279471.html?s_z=n_c3279471
Multitool for kerbside motorcycle wiring repair - Page 1
Forum section: electronics / general

author: djsb
author_rank: Super Contributor
timestamp: January 08, 2025, 03:54:24 pm
content: Are there any multitools that have a decent wire stripper (for automotive size cable), knife and pliers (and maybe a screwdriver and bits for terminal fastening) that can be used to repair broken wires on a motorcycle at the kerbside. I have a 12v soldering iron already. I've often thought of buying a Leatherman or similar tool, but have never really convinced myself that I need one. Can anyone recommend such a tool? Thanks.

author: squadchannel
author_rank: Frequent Contributor
timestamp: January 08, 2025, 04:23:32 pm
content: first aid, I would prepare a soldering iron and solder, a knife and pliers, about 1m of 18 gauge wire, and wrench(8-15mm).won't need a stripper, a knife will suffice. its just bulky.

author: Poroit
author_rank: Frequent Contributor
timestamp: January 09, 2025, 02:59:36 am
content: G'day djsb,Have a look at Swiss Army Knives.

author: deadly_penguin
author_rank: Contributor
timestamp: February 09, 2025, 07:57:53 pm
content: Maybe a pen knife, lighter, and those solder tube things the telecoms mob like? I wouldn't fancy serious electrical work by the roadside, invariably in the cold and wet.You could also try asking Bike Chat Forums?If you're having regular roadside problems you need real tools for, are you riding a Harley?

author: djsb
author_rank: Super Contributor
timestamp: February 09, 2025, 08:23:52 pm
content: Not a Harley rider. Riding a 411 Himalayan (when weather permits here in the cold and wet UK)and thought it's best to be prepared. I try to make sure any potential electrical gremlins are squashed beforehand. I've probably been watching too many Itchy boots video's.
sapcon SPF5N50 LHD2X - Page 1
Forum section: electronics / general

author: mentholflash
author_rank: Contributor
timestamp: February 06, 2025, 03:58:39 am
content: Hi all.not sure if this is the right place to post but can anyone give me any details/specs on sapcon spf5n5o lhd2x ie: voltage rating.cant find anything on google.Thanks

author: Kean
author_rank: Unknown
timestamp: February 06, 2025, 12:28:35 pm
content: It would help if you said what it was, even if in general terms.If it is some kind of sensor, then maybe it comes from this company (although I don't see any SPF or LHD product codes).https://www.sapconinstruments.com/

author: mentholflash
author_rank: Contributor
timestamp: February 07, 2025, 01:29:29 am
content: Sorry forgot to add pic

author: SMTech
author_rank: Frequent Contributor
timestamp: February 07, 2025, 08:39:05 am
content: Quote from: mentholflash on February 07, 2025, 01:29:29 amIgnore the manufacturer prefix and name 5N50 is a 500V mosfet, widely cloned

author: mentholflash
author_rank: Contributor
timestamp: February 08, 2025, 07:39:49 am
content: Thanks for the replies
Exciting new posts dropping soon... - Page 1
Forum section: electronics / general

author: jduncan
author_rank: Regular Contributor
timestamp: February 06, 2025, 10:32:57 am
content: Got offered this enticing new opportunity last night on Upwork.Since presumably some social media person from PCBONLINE is monitoring this forum, please understand that this strategy is very poor. You have certainly lost any chance of business from me and anyone I advise.

author: Fryguy
author_rank: Regular Contributor
timestamp: February 06, 2025, 10:39:52 am
content: . . . and not let people see , that it is a soft advertisement . . .Too late !

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 06, 2025, 10:59:21 am
content: Too late indeed:https://www.eevblog.com/forum/jobs/eevblog-forum-user-to-write-a-forum-post-about-pcb-manufacturers/