hybridfree/eevblog-posts huggingface dataset:
Qualities of Silver Bearing Solders - Page 1
Forum section: electronics / general

author: 45Overload
author_rank: Contributor
timestamp: February 05, 2022, 01:16:34 pm
content: I'm looking for some general information on silver bearing lead solders. Not interested in audiophile myths. (Hand soldering specifically). My observation is that the silver flows more readily than 60/40. Is the joint really stronger with added silver? Discounting the extra price, is silver solder a good choice for daily rework jobs? Does it require a special flux?Thank You!45O

author: SilverSolder
author_rank: Super Contributor
timestamp: February 05, 2022, 02:49:58 pm
content: I almost have to comment, right?Here are the main reasons why I like using 62Sn-36Pb-2Ag for hand soldering:(1) 62Sn-36Pb-2Ag is eutectic, meaning it has a distinct melting point instead of a melting range Eutectic solder is easier to work with than 60/40 because it goes directly from liquid to solid. With 60/40 (not eutectic) one side of the joint can freeze before the other as things are cooling off... and if you accidentally move the joint before both sides freeze, you get a bad joint.(2) 62Sn-36Pb-2Ag has a slightly lower melting point than 60/40 or 63/37. This makes it a little easier to avoid cooking components or the PCB while hand soldering - the iron can be set slightly lower.62Sn-36Pb-2Ag 179C Eutectic60Sn-40Pb 186C Not eutectic63Sn-37Pb 183C Eutectic(3) The silver content of 62Sn-36Pb-2Ag decreases solubility of silver that is already on the silver-metallized surfaces of some SMT components, e.g. some ceramic capacitors.(4) Cosmetically, the solder joints made with 62Sn-36Pb-2Ag are shiny and beautiful. Sometimes, aesthetics matter!(5) The strength & fatigue properties are comparatively good.
Any good, under $100, soldering station from Banggood? - Page 1
Forum section: electronics / general

author: e1ioan
author_rank: Newbie
timestamp: February 04, 2022, 07:59:34 pm
content: I'm looking to replace my US 120 Volts (60Hz) AC soldering station with a EU 220 Volts (50Hz) AC (moving back to EU). Any good ones on Banggood that are under 100 USD?TIA

author: MR
author_rank: Regular Contributor
timestamp: February 05, 2022, 03:47:34 am
content: TS100 is acceptable, but I can really tell don't save your money on the soldering station a good one really pays off over time.Aside of a soldering station you should also have a pre-heater and so on...

author: HumbleDeer
author_rank: Contributor
timestamp: February 05, 2022, 03:49:24 am
content: KSGER T12 stations sell for a relatively decent price; albeit higher than AliExpress, but with the added (paid) bonus being a slightly better Customer Service / Warranty service.

author: FlyingDutch
author_rank: Regular Contributor
timestamp: February 05, 2022, 11:03:32 am
content: Hello,I am using such station (YIHUA-862BD) for three years now, and I am glad as it is working:https://www.banggood.com/YIHUA-862BD+-EU-220V-High-Power-2in-1-Hot-Air-Rework-Soldering-Station-with-Imported-Heater-for-Phone-Repair-Tool-p-1711201.html?cur_warehouse=CZ&rmmds=searchEarlier I was using YIHUA-937D for few years and also I was glad, but there were little issue with fastening the soldering tip (plastic thread)https://www.banggood.com/YIHUA-937D-220V-or-110V-Temperature-Control-ESD-Digital-Soldering-Station-Rework-Station-p-1854649.html?cur_warehouse=CN&ID=47184&rmmds=searchBW: about a year ago I aslo buy such kit on AliExpress:https://www.aliexpress.com/item/32790086981.html?gatewayAdapt=glo2pol&spm=a2g0o.9042311.0.0.27425c0f3LafxVI assembled it (which wasn't difficult) and I am also very glad - it has big power (90W) and works fine - I take it when I have to solder something "in the field".Best Regards
Make paste layer from gerbers w/o a paste layer?  - Page 1
Forum section: electronics / general

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: April 10, 2022, 09:50:19 pm
content: I have a project where we have the board gerbers, but no paste layer, can't get a paste layer apparently. Rather than *hope* the board house can make a good paste layer, I'd rather make it myself.Any good software (reasonably priced) that will allow me to import the copper/soldermask layers and then manipulate it to make a good paste layer?

author: SMTech
author_rank: Frequent Contributor
timestamp: April 11, 2022, 08:17:27 am
content: You could "rent" Fab3000 (Numerical cloud) for a month rather than buying it. I haven't used it for stencil work but it is the most stable and easy to use software I found for generating a pick and place file from Gerbers, another of its tricks.All the dedicated stencil houses we have used have always been able when necessary to generate a stencil layer form the other layers when given a full Gerber Set. Indeed one of them always refers back to the top copper for further verification when making a stencil by default, regardless of whether a paste layer is provided.In house we tend to create stencil layers inside Altium, but if that is not what you have already, clearly its not a cheap option.
Instruction Manual for Tenma Solder Rework Station - Page 1
Forum section: electronics / general

author: LoveLaika
author_rank: Frequent Contributor
timestamp: February 03, 2022, 09:00:22 pm
content: I have a Tenma 72-6345 Solder/Desolder rework station. It looks fancy, but I want to learn how to use it right (and to make sure I don't break it). Does anyone know where I can find an instruction manual for it? This was purchased long before my time, so there's no physical copy.

author: thm_w
author_rank: Super Contributor
timestamp: February 03, 2022, 10:36:53 pm
content: Keep temperature reasonable, clean the desolder chamber if its clogged, I don't see how you'd break it.Don't see any manualshttps://canada.newark.com/tenma/72-6345/vacuum-rework-station-48w-24v/dp/12P9809https://www.gmelectronic.com/data/attachments/czn.730-377.1.pdf
advice on reflow for LSHM-150-06.0-L-DV-A-S-K-TR Samtec, LSHM Razor Beam - Page 1
Forum section: electronics / general

author: Martin Miranda
author_rank: Regular Contributor
timestamp: January 12, 2022, 07:55:35 am
content: LSHM-150-06.0-L-DV-A-S-K-TR Samtec, LSHM Razor Beamhas anyone tried to solder reflow this connector?

author: Gribo
author_rank: Frequent Contributor
timestamp: January 13, 2022, 03:51:33 pm
content: One of our customers uses this connector in their PCBAs, and we do reflow it.

author: Martin Miranda
author_rank: Regular Contributor
timestamp: February 02, 2022, 07:26:11 am
content: update: we had problems with solder paste giving enough solder for the pad. the pre-production run went smoothly.
New Pick Place machine NeoDen10 - Page 1
Forum section: electronics / general

author: Tonny-NeoDen
author_rank: Contributor
timestamp: February 12, 2022, 06:45:07 am
content: Our company-NeoDen released a new model-NeoDen10(8 working heads+linear grinding screws+close loop design in X/Y moving).More details,feel free contact to us. --- Tonny-NeoDen
Favorite small batch assembly houses? - Page 1
Forum section: electronics / general

author: drwho9437
author_rank: Regular Contributor
timestamp: January 08, 2022, 09:44:41 pm
content: I'm thinking mostly jobs of 2-10 units. With stuff like pretty fine pitch BGAs. I can do most things myself but once it gets to fine pitch BGAs I am hit or miss.What are your favorite places to do small batch work? What sort of inputs do your favorites need to turn the job? (Parts kitting documentation for asm, etc.)Thanks!

author: mazurov
author_rank: Frequent Contributor
timestamp: January 13, 2022, 01:58:00 am
content: I like Advanced Assembly. The quality is very good and their DFA is second to none.They are requesting pretty long length of the tape to feed their machines. Even if you need 2 pieces they may want to buy 10-60 of a component, depending on the component size. Could be frustrating If you're paying your own money. There is no minimum for trays.

author: SMTech
author_rank: Frequent Contributor
timestamp: January 13, 2022, 08:48:46 am
content: Quote from: mazurov on January 13, 2022, 01:58:00 amThe trouble is if you don't set these limits as an assembler you could rapidly end up with a job that's 70% manually loaded or worse, which introduces an extra process with chances for error and buckets of time. SMT with automated equipment is basically reliant on production packaging and that typically includes a minimum tape length for the feeder to hold as well as enough for the operator to handle, possibly a leader section of tape and a certain amount of cover tape. On our Essemtec with CLM feeders I'd say anything shorter than 10CM is pretty annoying to handle and that's 50 parts at 2mm pitch, however the chances are those parts are pretty worthless anyway. I'd estimate a job thats cretaed entirely with strips of tape takes at least 3 times longer to prep for loading than one using reels, and longer to unload to unless it was all going straight in the bin.

author: dkonigs
author_rank: Regular Contributor
timestamp: January 15, 2022, 04:08:18 am
content: I haven't run a job with them yet, but there's always Small Batch Assembly (https://www.smallbatchassembly.com/). I'm currently planning to use them for my next project, unless I find a reason to use someone else instead.However, that's for a small "production" run. For a half-dozen to a dozen units, I'd probably just build them by hand.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: January 15, 2022, 06:28:04 am
content: Quote from: dkonigs on January 15, 2022, 04:08:18 amHaving following him on Twitter, I would recommend him too despite never use his service before.

author: drwho9437
author_rank: Regular Contributor
timestamp: January 22, 2022, 07:12:08 pm
content: Very good to know about this place, its actually within driving distance of me as well...
Preheater recommendation - Page 1
Forum section: electronics / general

author: KaneTW
author_rank: Frequent Contributor
timestamp: January 23, 2022, 03:12:21 pm
content: I'm working on relatively dense 10+ layer boards and need a preheater (total board size <150x100 but margin is good).I wanted to buy the zephyrtronics 15cfm unit but the shipping to Germany or even US is insane. $350+ for international freight, $100 for non-ground US freight??? It's not that big of a unit.What alternatives are there? Metcal's convection preheater looks ok. JBC seems too expensive. I generally would prefer hot air over IR but it's not a hard requirement.

author: mon2
author_rank: Frequent Contributor
timestamp: January 23, 2022, 07:29:58 pm
content: How about the Hakko FR830-02 ?My bro loves this model and used it often when he worked for Intel. We bought ours - 100% new but surplus on Ebay and saved about $50-$75 USD off the DK pricing.To elevate our PCBs we purchased a rework table jig from Aliexpress. Just my 2-bits.

author: mazurov
author_rank: Frequent Contributor
timestamp: January 24, 2022, 12:58:45 am
content: I'm using AOYUE 866. It works all right as a preheater. Hot air piece is handy too. Never tried the iron.

author: KaneTW
author_rank: Frequent Contributor
timestamp: January 24, 2022, 06:25:30 pm
content: Decided to go with the Metcal one. Best availability + price/specs ratio of everything that I saw.

author: thm_w
author_rank: Super Contributor
timestamp: January 25, 2022, 11:39:42 pm
content: Why would you prefer hot air over IR? Hot air is worse, the power output is so low.Yihua 853/Gordak 853 is working well for me.

author: KaneTW
author_rank: Frequent Contributor
timestamp: January 25, 2022, 11:45:58 pm
content: Tall components, not having to deal with radiant heat and thermocouples.
Best module for global cellular upload with 4 Mbit/s+ practical upload speed? - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: January 07, 2022, 01:37:34 pm
content: Hi all,We're looking to identify the best cellular module for a new PCB design.Our use case in short:- We produce data loggers that record large amounts of data to an SD card- The recorded log files are automatically uploaded to the user's own server when the device is connected- Today we have a WiFi-enabled version, but we're looking to add a device with built-in cellular functionalityOur spec requirements:- Upload speed: Ideally 3+ Mbit/s in practice (not just theoretical)- Coverage: Ideally global via 1 module variant (most seem to come in multiple variants to achieve this)We've looked at u-blox modules like the TOBY-L2 series (4G, regional) and SARA-U2 series (3G, global), but we seem to be unable to find options that offer both 4G upload speeds and global coverage. We'd be interested in hearing any thoughts/suggestions for what modules we might consider.Thank you!

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: January 08, 2022, 04:13:02 am
content: Was in the same situation. It's either you opt for the CAT LTE-M or NBIoT modules that has many global band modules from variety of brands to choose from. But, the big BUT is these network are not fully supported everywhere, patchy at best I would say. So, you probably have to opt for LTE Cat-1. Not many global modules available unless from Quectel which I uses but the current Qualcomm chip set shortage that the modules are based on brings the lead time to half a year, even for samples. Your typical other manufacturer like Sierra Wireless or Ublox doesn't have global module. SIMCOM has a few modules that I think could fit the global band requirements although not fully in the sense say for NA bands, not all the bands are fully supported. And these modules are based on ASRmicro chip set which brings down the cost a lot lower compared those based on Qualcomm ones. But, again lead time is another issue for these too. Just forget about 3G totally as they are already being sunset in many developed countries and even here in Malaysia.

author: Thomas F
author_rank: Newbie
timestamp: January 20, 2022, 10:42:35 am
content: Hello,For any global deployment, you need to consider LTE CAT1 (goes until 10Mb/s).As is saying 48X24X48X, ASR and Qualcomm are having 40+ weeks of leatdime, which impact all the module manufacturers.At Cavli Wireless, we provide a C10GS module with global band, eSIM integrated to go anywhere in the world, platform management for connectivity and module. More specifically, it is based on GCT semiconductor chipset and our leadtime is between 5 and 10 weeks.Go check the module here :https://www.cavliwireless.com/c-series/c10gs.htmlLet me know if you have any questionsThomas FESQUETthomas.fesquet@cavliwireless.com
English documentation for Seho 1030 - Page 1
Forum section: electronics / general

author: VladaAca
author_rank: Contributor
timestamp: January 08, 2022, 07:03:43 pm
content: Hello,does anyone have English documentation (owners manual...) for Seho 1030 wave soldering machine. Any help is appreciated.

author: Mangozac
author_rank: Frequent Contributor
timestamp: January 09, 2022, 12:11:56 am
content: I've got a manual for the 1135-G. I don't know how similar it is?

author: VladaAca
author_rank: Contributor
timestamp: January 09, 2022, 12:33:17 am
content: ...not same machine, in case of despair I ask to send me, don't know does the controller same or ...

author: Mangozac
author_rank: Frequent Contributor
timestamp: January 09, 2022, 12:35:49 am
content: Sorry I can't answer thatLet me know if you decide it's worth sending.

author: VladaAca
author_rank: Contributor
timestamp: January 19, 2022, 06:15:06 pm
content: ...finally I got it from manufacturer local representative. More than 15 days for few mouse click.
LED blowing off - Page 1
Forum section: electronics / general

author: Munyua44
author_rank: Contributor
timestamp: January 17, 2022, 11:09:18 am
content: My LED on the board keeps blowing off. what might be the error?

author: kylehunter
author_rank: Regular Contributor
timestamp: January 17, 2022, 03:54:14 pm
content: We'll need much more info. First thing to check, is to make sure you're not breathing or blowing on it. That certainly could cause a part to move.

author: DLE
author_rank: Contributor
timestamp: January 17, 2022, 07:47:37 pm
content: Could be a few things. Not enough paste for the part to stick to, PNP not pressing the LED into the paste, blow setting on PNP during place is too high, place delay too short, place height too high and PNP is dropping the part. Hard to say with limited info but those are the first things that come to mind.
pick and place machine - Page 1
Forum section: electronics / general

author: Munyua44
author_rank: Contributor
timestamp: January 17, 2022, 11:03:25 am
content: My pick and place machine has failed to work. it picks components but places them in the wrong position. How can this be solved?

author: jmelson
author_rank: Super Contributor
timestamp: January 17, 2022, 04:45:39 pm
content: Try to understand which components are being placed where, and see if you can detect a pattern there. Maybe you don't understand the coordinate system of the machine. Does it use fiducials to adjust for where the board is placed? Where is the "reference corner" of the board? Is there a test mode where it shows you the offset computed by fiducial measurement?Create a board placement file that only places one part on the board. Get that to work, then try to get 2 parts to work. Are you using placement data from the CAD package, or teaching the placement position? Do you have solder paste on the board? If not, the parts will bounce around. For testing, put double-sticky tape on the board, and you can check accuracy by looking through the tape.Sorry, a lot more questions than answers, but you didn't give us much info to go on.Jon
Metal Fabricators in Sydney? - Page 1
Forum section: electronics / general

author: sandalcandal
author_rank: Unknown
timestamp: January 14, 2022, 01:50:10 am
content: Does anybody know or can recommend someone for metal fabrication in Sydney [preferably near Botany]? Just need some help with small electronics related jobs e.g. heatsink and enclosure modification for prototypes.I would normally DIY but recently moved and don't have a mechanical workshop set up or access to one. The local makerspaces look pretty expensive; more than I would think a small job shop would charge.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: January 14, 2022, 03:04:29 am
content: Quote from: sandalcandal on January 14, 2022, 01:50:10 amMen's shed.

author: sandalcandal
author_rank: Unknown
timestamp: January 14, 2022, 06:28:42 am
content: Quote from: Ed.Kloonk on January 14, 2022, 03:04:29 amKnow any good ones with metal working equipment? Most of them seemed to be woodworking, furniture and boats. [None really have much of an "online presence" either so really hard for me to find out who has what without knowing anyone]Thanks
LED lamp pcb strange solder joints - Page 1
Forum section: electronics / general

author: goaty
author_rank: Regular Contributor
timestamp: January 13, 2022, 08:01:52 am
content: Hi,I disassembled a dead LED lightbulb and wanted to desolder some LED chips.When applying hot air, the chips basically fell off the board.What is that black stuff ? I tried the hot air with 450°C and nothing melted.Thanks, Thomas

author: sleemanj
author_rank: Super Contributor
timestamp: January 13, 2022, 08:35:55 am
content: Thermal compound would be my guess, the oval areas in the middle being the solder. Weird, never seen that before.

author: goaty
author_rank: Regular Contributor
timestamp: January 13, 2022, 09:23:06 am
content: I think only the black areas are the "solder" areas, as the oval spots are plastic on the LEDs.I was just very curious about the method of attaching the LEDs here. Seems to me more glued kind of than soldered.It´s from a cheap LED light.

author: sleemanj
author_rank: Super Contributor
timestamp: January 13, 2022, 11:06:50 am
content: Could be an electrically conductive adhesive, but I don't know why they would use such in that application where normal reflow would have done, and the brown gunk around led outline looks like flux residue.Take one of the LEDs you took off and apply a soldering iron directly to the remaining black stuff, see if it flows, could just be a weird looking, or just bad solderpaste.
Should I get autotransformer or Isolation transformer for Hakko to run on 240V ? - Page 1
Forum section: electronics / general

author: electronic_guy
author_rank: Regular Contributor
timestamp: January 09, 2022, 06:00:42 pm
content: Hi,I need to use a Hakko fx-888D 120v soldering station with 240 V. Should I buy an isolation transformer or auto transformer ? Voltage step down devices come with both these transformer types. Which one is better and what is the reason for this selection? Please let me know.Also I looked into several products which are available in Amazon and Alibaba. There's Simran and Dynastar brands on Amazon which are sold from US but manufactured in China. And on Alibaba its no use to look for brands, seems like I can print my name on it, if I want on it. So I'm bit confused with selecting a trustworthy product.Thanks.

author: bob91343
author_rank: Super Contributor
timestamp: January 09, 2022, 06:57:45 pm
content: I think the Hakko probably already has the isolation you need. So autotransformer is a simpler, cheaper, and smaller alternative.

author: PKTKS
author_rank: Super Contributor
timestamp: January 10, 2022, 01:32:02 pm
content: ISOLATION transformer....While both will do it...The ISOLATION will serve you for other uses as well.Even while not using your device.. you can isolate other loads...Far better money for the bucks..Choose a proper rated with enough power to your IRON..at least 20% or 50% above nominal..Paul

author: rsjsouza
author_rank: Super Contributor
timestamp: January 10, 2022, 03:00:18 pm
content: Quote from: electronic_guy on January 09, 2022, 06:00:42 pmAs the other two people mentioned, the answer to your question is that it depends on the load. If your Hakko is in proper working condition (no modifications or damage), it already provides proper isolation and therefore the purchase can be driven by cost - the autotransformer will be smaller and have lower cost. Your second question is which one is better: in this case, the isolation transformer is usually better as it can give you more flexibility to be used in other applications that require full isolation from the mains supply.However, the proper use of an isolation transformer is subject of discussion and is not recommended in several cases as well1.In my opinion, if you are using the transformer for a single purpose of powering your Hakko, go with the autotransformer and plan to get a full isolation transformer at a later time if you see the need.1If you are interested in the discussion about the isolation transformer usage, check some of the discussions below (there are many more):https://www.eevblog.com/forum/repair/why-not-always-use-a-isolation-transformer/https://www.eevblog.com/forum/chat/isolation-transformer/https://www.eevblog.com/forum/testgear/isolation-transformer-a-2nd-one-for-the-osciloscope/https://www.eevblog.com/forum/projects/isolation-transformer-for-oscilloscope-how-to-wire-ground/https://www.eevblog.com/forum/testgear/best-practice-isolation-transformer-for-dut-or-isolated-differential-probe/https://www.eevblog.com/forum/testgear/lisn-device-and-isolation-transformer/
EU Supplier of plastic sheets or plastic shim for air-gap in SMPS magnetics - Page 1
Forum section: electronics / general

author: butech
author_rank: Contributor
timestamp: January 03, 2022, 10:16:56 am
content: Hi,To build prototypes of SMPS magnetics, I am searching for a supplier of thin plastic sheets or plastic shims with thicknesses of 0.025 mm to 1 mm (best in steps of about 0.025mm) used as a spacer for air-gaps. I am using a mix of different weight papers and/or adhesive tape to manufacture them, but this does not always lead to clearly defined air-gap lengths. E.g., when using paper this will be more or less compressed when manufacturing the parts.Therefore my question is if anyone knows a supplier of plastic sheets (available in small quantities) in Europe?Thank you.

author: strawberry
author_rank: Super Contributor
timestamp: January 10, 2022, 04:47:22 am
content: in EUhttps://atlantija.lv/?l=lv&menu=aboutelectrical paper , was ~3eur/m^2 0.2-0.3-0.4-0.5-1.0-2.0 or impregnated ~0.15-...0.4 or PET ... most will withstand 100..155..200C
Pick & Place Machine from AliExpress with Malware (Zhengbang ZB3245TSS) - Page 1
Forum section: electronics / general

author: RichMo
author_rank: Newbie
timestamp: January 09, 2022, 05:45:54 pm
content: Hello,I recently bought a new pick and place machine for small batch assembly. I had considered a few different ones but eventually went with the Zhengbang ZB3245TSS as this was discussed in another post and had reasonable feedback.https://www.eevblog.com/forum/manufacture/experience-with-zheng-bang-zb3245ts-anyoneI'm yet to use it for making PCBs as I have discovered that it came pre-installed with malware out of the box! Very shady. Has anyone else with one of these machines checked it for viruses? You can read about my experience with it so far here..https://www.rmcybernetics.com/general/zhengbang-zb3245tss-pick-place-machine
Hot air gun only blows when hold hand near holder - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: January 04, 2022, 08:31:28 pm
content: Hi,Our Xytronic LF-852D hot air gun only blows hot air when i hold my hand on, or near the gun holder.Do you know why this is?https://www.rapidonline.com/xytronic-lf-852dii-smd-hot-air-rework-station-1000w-85-1229

author: thm_w
author_rank: Super Contributor
timestamp: January 04, 2022, 10:46:29 pm
content: "Automatic cooling mode protects the heating element ""Heat switches off when air gun is in holder and switches on again when the gun is taken out for use"There is going to be a hall effect sensor or reed switch in that area of the holder. Try tapping it or putting a magnet there. Maybe something loose inside.Assuming you've properly set the temperature and airflow settings.
Essemtec SP100V - Page 1
Forum section: electronics / general

author: rszemeti
author_rank: Newbie
timestamp: January 12, 2022, 11:49:34 pm
content: Hi,I have a nice little semi-auto stencil printer picked up off another forum member, I've managed to figure most of it out but some bits still confuse me ...Does anyone have an ops manual? It looks like it all "works", in that I can get the pneumatics to lift the lid, make the squeegees move about etc, but I think I am still in some sort of test mode ... an operations manual would be awesome if there is one around.Going to make up some squeezee holders next ...

author: SMTech
author_rank: Frequent Contributor
timestamp: January 13, 2022, 02:49:04 pm
content: If the manual that came with my SP003 is anything to go by, it will be a poorly written very much paper based manual. The printer itself is probably made by PBT but I don't know what their equivalent model would have been. Has the previous owner given you no tips at all? If you ask KPE nicely, they might be able o scrounge up knowledge and spares as its likely they sold or supported it during its lifetime.

author: rszemeti
author_rank: Newbie
timestamp: January 14, 2022, 04:43:41 am
content: I don't think the previous owner had much info when he got it ... but he has been very helpful, and a contributor on this board, nice guy and did me a really good deal on the machine.I'm working it out, but, a manual would help, I've contacted Essemtec, we'll see what comes.

author: rszemeti
author_rank: Newbie
timestamp: January 15, 2022, 01:06:17 am
content: And solved! Managed to get a manual from the very helpful people at the UK agent, Altus Group.Machine works a treat, there is a "vacuum on" button and a "raise the lid" button, but I couldn't figure out how to lower the lic ... the bit I was missing was "press both buttons at the same time" ... easy.
Oops: Asus Z690 HERO motherboard electrolytic cap polarity - Page 1
Forum section: electronics / general

author: Howardlong
author_rank: Super Contributor
timestamp: December 31, 2021, 11:00:57 pm
content: It appears that a 150uF 6.3v (marking 150 J) electrolytic cap on one of the board's power supplies has been installed the wrong way around on some boards.Presumably, someone substituted a part, and the polarity was swapped on the tape.https://wccftech.com/asus-confirms-reversed-memory-capacitor-as-the-root-cause-of-rog-maximus-z690-hero-issues-will-offer-replacement-to-all-affected-users/

author: thm_w
author_rank: Super Contributor
timestamp: January 01, 2022, 12:48:29 am
content: Looks like polymer electrolytic has the same crazy Anode marking as tantalums do.https://static4.arrow.com/-/media/arrow/images/miscellaneous/1/1216-tantalum-capacitors-image-2.jpgWonderful.

author: Howardlong
author_rank: Super Contributor
timestamp: January 01, 2022, 09:49:37 am
content: Quote from: thm_w on January 01, 2022, 12:48:29 amAgreed, there are those EEs who’ve already been there, and those who will.
6 pin pir  - Page 1
Forum section: electronics / general

author: Captainchaos365
author_rank: Newbie
timestamp: January 20, 2022, 01:54:06 am
content: Hey everyone. I'm working on a project that involves removing a 6 pin pir from the main pcb.I've removed it and soldered wires from the relevant pins to the board.My problem is the pir will switch on but won't switch off.Any idea how to solve this?
Li-po battery testing - production - Page 1
Forum section: electronics / general

author: bipolunipol
author_rank: Contributor
timestamp: December 26, 2021, 03:32:45 pm
content: Hello,I am working on starting the production of the device. The device will be powered by a Li-po battery. And I wonder how to solve the problem of testing Li-Po batteries (with PCM) that will power this device? These will be cheap batteries from China, and I'm afraid some of them may have factory defects. Should I test batteries soldered on a PCB or maybe separately? And if the test is on a PCB, how can I do it best and fastest?The second question has to do with the battery assembly process.I chose that this battery would be soldered to the PCB. Does it matter that accidental short circuits may occur during soldering? The battery has PCM and it shouldn't get damaged, but it doesn't shorten its life?
What is your experience with Component ??  - Page 1
Forum section: electronics / general

author: Thommyy
author_rank: Newbie
timestamp: December 11, 2021, 08:25:43 pm
content: Hi,does anyone have any experience with this company?https://www.component-cz.com/Thank you for your adviceTomas

author: NorthGuy
author_rank: Super Contributor
timestamp: December 11, 2021, 09:44:39 pm
content: The domain is registered in Guangxi, China if this is of any significance to you.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: December 11, 2021, 09:47:45 pm
content: Wondering if the OP is, too...Tim

author: wraper
author_rank: Unknown
timestamp: December 11, 2021, 09:51:28 pm
content: Scam which is separating people from their money.https://www.eevblog.com/forum/beginners/this-website-looks-so-fake/msg3630155/#msg3630155

author: Halcyon
author_rank: Unknown
timestamp: December 12, 2021, 06:57:41 am
content: OP's IP address is registered in .CZ. Might keep an eye on this one...
Dry film photoresist protection layer removal - Page 1
Forum section: electronics / general

author: Flexbex
author_rank: Contributor
timestamp: December 30, 2021, 07:40:08 am
content: Hi I successfully dialed in the process of etching my PCB using transparent foil an inkjet, transparent paper and dry foil.The only problem I occasionally have, is when I want to remove the last protective foil after UV Exposure I accidentally also pull up parts from the centre foil which should stick to the copper. It mostly happens to unconnected pads.My process of developing is.-Clean copper with 400grid sandpaper-Wash it with water-clean again with alcohol-dry it-spray water-remove inner layer-apply foil and remove bubbles with rollerand spatula- iron the foil with 110°- with finger and heat gun press foil on board(just to be sure)- let it dry for an hour in dark place- UV exposure 40sec in converted scanner unit- pull of protective foil parallel to boardAnd here I occasionally pull of parts from the centre foil from the board.Any ideas? Maybe longer exposure? Maybe apply a bit of a weak acid like vinegar?

author: Martin Miranda
author_rank: Regular Contributor
timestamp: December 30, 2021, 07:49:08 am
content: picture? what foil are you using?

author: Flexbex
author_rank: Contributor
timestamp: December 30, 2021, 07:57:30 am
content: Ah sorry I am on vacation so can't do pictures. I mixed up foil and film. It's dry film and a no name Chinese one. Can't get hands on a proper one here. The process I do is similar to that onehttps://ezcontents.org/pcb-fabrication-part-1-dry-film

author: Martin Miranda
author_rank: Regular Contributor
timestamp: December 30, 2021, 08:05:03 am
content: dry film photoresist.

author: Flexbex
author_rank: Contributor
timestamp: December 30, 2021, 08:07:19 am
content: Yes! That's the name!
Preheater Board Holder - Page 1
Forum section: electronics / general

author: squ1d_ink
author_rank: Newbie
timestamp: December 08, 2021, 07:34:09 am
content: I just picked up Pace ST400 preheater and I am looking for a good board holder. Need somthing that can do boards from ATX motherboard size to small credit card sized boards. Pace, Metcal, and Hakko all have good designs but what I am finding hard to swallow is the price-$500-$1000. I have no problem paying the high price for good gear but what is being asked for a good board holder feels like a shot to the nutts. I am hoping I have missed a reasonable priced choice that someone can point me too. Any thoughts or recommendations would be appreciated.
Interpretation of min track widths - Page 1
Forum section: electronics / general

author: pj
author_rank: Contributor
timestamp: December 06, 2021, 08:38:20 am
content: Hi all,Can someone help me interpret this table please.To me it looks like a 0.2mm track can handle 1.8A in T4 (first column)However looking at the example text provided it seems a 2mm track is required for 1.833AAny thoughts?Code:For example, on printed circuit boards of at least 0,5 mm thickness, having a conducting trackof at least 33 µm thickness on one or both sides, by applying factors given in Table 3, atemperature classification of T4 or Group I shall be given to the printed tracks if they have aminimum width of 0,3 mm and the continuous current in the tracks does not exceed 0,444 A.Similarly, for minimum track widths of 0,5 mm, 1,0 mm and 2,0 mm, T4 shall be given forcorresponding maximum currents of 0,648 A, 1,092 A and 1,833 A respectively.

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: December 07, 2021, 06:38:57 pm
content: "continuous" current load ratings are smaller than pulsing current loads.
Second  source for TPS5401D - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: December 06, 2021, 01:45:15 pm
content: Hi,We layed out a board for TPS5401D....(10MSOP), but its gone nil stock.We cant find a like-4-like alternative.Do you know of one?TPS5401D is a buck regulatorhttps://www.ti.com/lit/ds/symlink/tps5401.pdf?ts=1638793533817&ref_url=https%253A%252F%252Fwww.ti.com%252Fstore%252Fti%252Fen%252Fp%252Fproduct%252F%253Fp%253DTPS5401DGQ

author: Kean
author_rank: Unknown
timestamp: December 06, 2021, 02:41:07 pm
content: No idea about that specific part, but have a look at the Richtek range. They have a number of parts that are "compatible" with some other TI DC/DC converters I've used.https://www.richtek.com/They even have some in MSOP-10 with basically the same pinout as the TPS5401 but with different specs e.g. RT6362.Whether you can source any of them is another matter...

author: SMTech
author_rank: Frequent Contributor
timestamp: December 06, 2021, 03:28:11 pm
content: Also don't forget to leave out any of the packaging letters from the part number when searching or sending out requests. some places are smart enough to filter that out if your options are limited, and some are not.I'm sure many of us have reached the same conclusion as TSMC and various bits of the press report, the current component shortages all point back at TI as being the primary bottleneck with LT/AD close behind. Only another 18months to goyay!

author: thm_w
author_rank: Super Contributor
timestamp: December 06, 2021, 11:21:17 pm
content: https://octopart.com/search?q=TPS5401D&currency=USD&specs=0

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: December 07, 2021, 01:23:43 am
content: https://www.netcomponents.com/results.htm?d=1&flts=1&t=f&sm=&r=1&lgc=begins&pn1=TPS5401D
Probing old, corroded, conformal coated units when fault finding? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: December 03, 2021, 07:33:12 am
content: I had to probe nodes on a 4kW PSU while fault finding. The conformal coating seemed to have got on the soldered thru hole pins so it was hard to probe them. Also the unit had been in use for years and so the exposed metal pins and pads were kind of a bit corroded.Eg a fuse was good, but I couldn’t get contact whilst probing between its metal holders.I tried to probe the primary rail. The only way I could do this was to melt solder up on the pins of the bus capacitor…...and only then I could sucessfully probe it.How can you fault find boards like this? Do you literally have to just go round the pins with a hot soldering iron and re-wet the solder joints? Kind of melting off the conformal coat and busting through the corrosion. You cant seem to find those sharp-point probes anywhere.

author: jmelson
author_rank: Super Contributor
timestamp: December 03, 2021, 05:15:25 pm
content: I have soldered sewing needles to .080" pin jacks that fit over the ends of the voltmeter probes. The needle points make good contact through wire insulation, most conformal coatings and corrosion. Getting the solder to wet to the needles is tricky.Jon

author: thm_w
author_rank: Super Contributor
timestamp: December 03, 2021, 11:23:50 pm
content: Sharp point probes are commonly available:https://www.pomonaelectronics.com/sites/default/files/d6341_6342_6275_103_2.pdfhttps://www.eevblog.com/forum/reviews/good-sharp-fine-tip-multimeter-probes-with-very-flexible-leads/

author: EEEnthusiast
author_rank: Frequent Contributor
timestamp: December 05, 2021, 03:43:59 pm
content: I once ran into this issue. Finally ended up cleaning up the coating using IPA and a brush.
Small qty assembly in Germany - Page 1
Forum section: electronics / general

author: OwenH
author_rank: Contributor
timestamp: November 17, 2021, 07:38:56 pm
content: Hi,I'm looking for recommendations for small batch assembly of 50-100 pieces. Ideally I would like to find an assembler in the Munich Germany area but that's not a requirement.Thanks!Owen

author: Doctorandus_P
author_rank: Super Contributor
timestamp: December 04, 2021, 01:19:45 pm
content: Maybe try Aisler.

author: DC1MC
author_rank: Super Contributor
timestamp: December 04, 2021, 07:49:04 pm
content: I've had excellent results few years ago with AB Technische Dienstleistung Böttcher & Jauch GbR, a small assembly house in Villingen-Schwenningen, Armin is a genius in soldering and they have pretty modern P&P machines.https://www.ab-td.de/kontakt/you can ship everything and get the assembled PCBs back, but I've always enjoined the trip there, very friendly and competent people.Cheers,DC1MC

author: avst
author_rank: Contributor
timestamp: December 05, 2021, 01:45:19 pm
content: We have used these for smaller runs:https://bahner-gmbh.de/
JLCPCB library for eagle? - Page 1
Forum section: electronics / general

author: phil123456
author_rank: Newbie
timestamp: November 23, 2019, 10:10:22 pm
content: Hello,is there an eagle library for the JLCPCB library assembly parts ?do we use our own custom library ? I dont get it(https://jlcpcb.com/client/index.html#/parts)regards

author: phil123456
author_rank: Newbie
timestamp: December 03, 2019, 10:25:32 pm
content: anyone ?

author: spongle
author_rank: Regular Contributor
timestamp: December 04, 2019, 04:05:31 am
content: yes, you have to make/find your own libraries. it's just a catalog of parts they stock.

author: BlackICE
author_rank: Regular Contributor
timestamp: December 04, 2019, 09:23:02 am
content: I desire the same JLCPCB parts library for diptrace. Too bad none seem to exist.

author: spongle
author_rank: Regular Contributor
timestamp: December 04, 2019, 02:20:25 pm
content: They're already offering PCBA for $5, don't expect them to build a library of 3000 parts for every ECAD tool anytime soon..

author: phil123456
author_rank: Newbie
timestamp: December 04, 2019, 05:43:47 pm
content: right, but what if the components dont match the package I designed....anyway at least I have my answerthanks

author: Combinatix
author_rank: Newbie
timestamp: December 01, 2021, 04:19:42 pm
content: As of today, I have published a beta release of JLC PCB Library for Eagle.JLCPCB provides two groups of parts: Basic and Extended. Basic parts are most common parts that are ready for assembly without any extra costs. At this moment, my library contains only selection of Basic Parts, like SMD resistors, capacitors, diodes, inductors and SOT23 transistors. My goal is to add more parts later.To make life easier, there is also an ULP script, that exports BOM and CPL files in one go!The script is designed to work with this library only. Any other use is at your own risk.You can find it on my Github,https://github.com/Combinatix/JLCPCB-Basic-PartsI'll be glad for any feedback! Please create issue if you have any problems with it.And of course, everything is free!
Passive components manufacturing - Page 1
Forum section: electronics / general

author: 5PNdcc0Jety0
author_rank: Newbie
timestamp: November 30, 2021, 02:17:18 pm
content: Do we have anybody here who is familiar with passives manufacturing, particularly SMT components?Is there even such a thing in the industry as a turnkey SMD component line, and if there is, how much does it cost?
CompactFlash connector for diy assembly - Page 1
Forum section: electronics / general

author: freda
author_rank: Regular Contributor
timestamp: November 26, 2021, 09:09:54 pm
content: I haven't done anything with CF cards before, and in a bit of a quandary what to choose foreasy diy soldering.I'm also learning kicad, so not sure atm about ready available footprints for these.mouser currently have these in stockhttps://au.mouser.com/c/connectors/memory-connectors/memory-card-connectors/?card%20type=CompactFlash&termination%20style=Through%20Hole&instock=yI've picked thru-hole here.there are SMT also available, but worried they might be a bit hard to DIY solderthey are not exactly just 5centsso I definitely like to be more sure to be happy with my pick.anyones experience to share ?and theres are a few things i've seen that confuse me a bithttps://retrobrewcomputers.org/n8vem-pbwiki-archive/0/35845334/35845372/35846055/39053510/IMG_1224.JPGhttps://cd169dc2-a-62cb3a1a-s-sites.googlegroups.com/site/oldcpusrus/home/68k-project/mini_w_cf.jpg?attachauth=ANoY7coZ5lcLatTuMDH27DFUtUPTa9L-abiCXI0ifJ1g0NTDiA6PftElzNBkkBUJ_lqYJT5H6eJV0vhUfVEPuZ2tmzOmc1A2xb0lS9kuGmD2ZEHer-Luw3qx5dXuew-JVUngBqM-NsYkZ1Hfg4aJs0sm5RjedmFfACmlPZScYqVCkUujwXwpDiTRqR-dZbpjDgUA-psRpP5VMXQuDcHhRHXHK86NFnVIyBFMmgjNh5qHiSDObV4C7kU%3D&attredirects=0i don't know what part numbers those picks are using.....i have ordered one of those CF adapters off ebay, haven't got it yet, so to do breadboard prototyping with....
Servicing work on SMPS units - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: December 09, 2021, 08:41:23 pm
content: Hi,I just had to service some returned 750W Offline (SMPS) Power supplies that have two 24V, 0.18A cooling fans in them.**Removing dust with air:Some have lots of dust over them, and due to all the components and daughter boards, its not possible to get rid of all the dust with just an ESD brush. How can you blow dust away without causing ESD harm to components?**Awkward_to_get_to screws:Some screws are on the PCB, and due to tall components crowded round the screw hole, you have to “stick” the screw to the screwdriver head with blu tak so that you can position the screw into the screw hole. Is there a better way than with blu tak?**Fan Rasping noise:On one unit, the fan is making a racket, kind of rasping. It’s a 24V, 0.18A BLDC fan. Outwardly the fan looks fine, but is it worth taking it apart?...or is it likely to be a cracked bearing , and hence a new fan is needed?

author: jpanhalt
author_rank: Super Contributor
timestamp: December 09, 2021, 08:57:05 pm
content: Does this mean you figured out how to screw them down to their boxes?

author: thm_w
author_rank: Super Contributor
timestamp: December 09, 2021, 09:59:40 pm
content: I prefer a vacuum cleaner for dust, but compressed air works too if you don't care about mess:https://www.eevblog.com/forum/chat/does-air-compressor-produce-esd/https://www.eevblog.com/forum/beginners/vacuum-cleaner-on-pcbs-disaster/You asked similar screw question here already:https://www.eevblog.com/forum/manufacture/blu-tak-used-in-metal-cased-psu-assembly/Replace the fan, don't bother opening it up or cleaning it.
Apply UV cure solder mask with a resin printer? - Page 1
Forum section: electronics / general

author: lscw
author_rank: Contributor
timestamp: December 24, 2021, 05:52:09 pm
content: I had the idea while reading old threads on PITA methods of DIY solder mask, nothing came up in the search box for it. Surely I'm not the only person to think it?I guess with a change out of resin/second printer you could do silk screen lettering as well.

author: lscw
author_rank: Contributor
timestamp: December 24, 2021, 10:46:21 pm
content: Ah, well resin printers are a bit different. They are a bath of UV-cure resin with a high resolution monochrome LCD at the bottom which partially cures an entire layer at a time. Stereolithography I think is the term.The main issue that I can think of is that they print upside down like a stalactite rather than stalagmite. Maybe just some double sided tape and suction cups would do given how quickly the .02mm/0.8mills will be applied.Extruding a liquid out of a FDM printer sounds like it could get messy. But the thicker solder masks maybe aren't that far off the viscosity of plastics at printing temperature.

author: DavidAlfa
author_rank: Super Contributor
timestamp: December 31, 2021, 01:11:04 pm
content: https://youtu.be/RudStbSApdE

author: lscw
author_rank: Contributor
timestamp: January 06, 2022, 03:53:37 am
content: Quote from: DavidAlfa on December 31, 2021, 01:11:04 pmthat timing isn't suspicious AT all
What fabs for 8+ layers? - Page 1
Forum section: electronics / general

author: olkipukki
author_rank: Frequent Contributor
timestamp: November 23, 2021, 10:26:34 am
content: What PCB houses are you using for 8-12 layers?Any specialized or from usual 'suspect'* list?* - looks like some can do these

author: Feynman
author_rank: Regular Contributor
timestamp: November 23, 2021, 11:45:12 am
content: Literally everyone can do 8-12 layers. So your questions is kind of pointlessBut you might have to pay for a full panel, if there is no pooling offered for your stack configuration.