hybridfree/eevblog-posts huggingface dataset:
JLCPCB parts rotation/shift download - Page 1
Forum section: electronics / general

author: pshev79
author_rank: Newbie
timestamp: September 13, 2025, 06:18:40 pm
content: Hi All,I just submit my first design to JLCPCB for manufacturing and assembly.I used Kicad to design schematic and layout, and when JLCPCB Tools and Fabrication plugins.Both of them worked fine.But, during the 3D preview of my board, I found than some parts shifted or rotated. I fix those errors in the viewer.My question is, how I can download my changes in order to update my Kicad part library?So, next time, those parts will be placed correctly.

author: jayx
author_rank: Regular Contributor
timestamp: September 13, 2025, 06:51:44 pm
content: I don't know how to download the changes you've made, but you need to check / update libraries in KiCAD to make sure they follow one standard for 0 degrees rotation. See this for details:https://www.eevblog.com/forum/manufacture/pcb-component-zero-orientation/

author: pshev79
author_rank: Newbie
timestamp: September 13, 2025, 07:45:23 pm
content: I am using two kinds of libraries. One is JLCPCB Kicad library, which upload parts from the website and generate bunch of libraries with JLCPCB_ suffix.Another one, is my own library with parts imported from LCSC website by the kicad plugin.In general, everything works fine, but several parts (not all of them) are misaligned and rotated.I can fix it in the viewer, but I wanted to incorporate those changes back into my library, so next time I do not have to do anything.And I know, that kicad and jlcpcb use different standards for parts rotation and origin, so some mismatches are inevitable.

author: JLCPCB Official
author_rank: Regular Contributor
timestamp: September 15, 2025, 02:27:15 am
content: Hello, We recommend using EasyEDA to create or review your design, as it includes the latest official JLCPCB component library.

author: pshev79
author_rank: Newbie
timestamp: September 15, 2025, 10:52:15 pm
content: Quote from: JLCPCB Official on September 15, 2025, 02:27:15 amI am not going to spend any time on cloud-based solutions, which can:1) Deny access to my own designs, for any reasons.2) Do not really guarantee safety of my proprietary designs. I am planning to open source everything, I am doing right now. But, it will be a MY CHOICE.So, locally running Kicad, completely satisfies me.
Problem with our SMT660 PnP machine - Page 1
Forum section: electronics / general

author: eddy1435
author_rank: Newbie
timestamp: August 20, 2025, 09:25:41 am
content: Hello everyone,We are using an SMT660 that had been running smoothly until recently.For some unknown reason, the program no longer responds when the "GENERATE PCB DATA" function is activated.No error message is displayed, but nothing happens. The software does not appear to be frozen, as the button can still be clicked, yet no action is triggered.We suspect that a recent Windows update might be the cause of the issue. Could anyone confirm which version of the operating system is known to be compatible with this management software?Thank you in advance for your assistance,Eddy.

author: eddy1435
author_rank: Newbie
timestamp: August 20, 2025, 02:27:14 pm
content: Hey everyone,Just in case someone runs into the same issue — it’s all fixed now!Not only was “Generate PCB Data” broken, but even the component orientations were messed up...Turns out the problem came from a Windows update that somehow switched the system language from English (EN) to French (FR).I’m on Windows 11 Pro, and everything’s working again now.Cheers,Eddy.

author: jmelson
author_rank: Super Contributor
timestamp: August 21, 2025, 09:26:15 pm
content: Quote from: eddy1435 on August 20, 2025, 02:27:14 pmOh, of course! To be oh so totally helpful, Microsoft saw that you are in France, so they change the default language to match your country! As always, Microsoft assumes all users are idiots, and would not know how to set the language without help from them!Jon
Looking for a compact conveyor style reflow oven (Australia) - Page 1
Forum section: electronics / general

author: deanclaxton
author_rank: Regular Contributor
timestamp: August 10, 2025, 08:45:13 am
content: Currently I have modded BTRTO-420 drawer style reflow oven (actually a charmhigh version of this), and when I'm doing a batch of boards I end up with a queue for reflow. To increase the throughput I'm thinking I need to look at small conveyor style ovens.I only have single phase 240V and not a lot of space (maybe 1m on the workbench) - this restricts the choice a lot I know.Is there anything out there like this that works well and is reliable?

author: deanclaxton
author_rank: Regular Contributor
timestamp: August 11, 2025, 09:07:41 am
content: Neoden IN6 might fit - something like that I reckon. I'll read up on it.

author: Mangozac
author_rank: Frequent Contributor
timestamp: August 11, 2025, 10:35:45 pm
content: For that small of an area I'd look to get a larger "professional" batch oven. I can't see a conveyor style oven that short being able to control thermal profiles really effectively for anything other than very small, low thermal mass boards.

author: alexig
author_rank: Contributor
timestamp: August 14, 2025, 05:30:57 am
content: I've had the Neoden IN6 for 4 years and it's worked well. I did have one element fail after the warranty expired but was able to buy a replacement from Neoden. It's compact and just plugs into the wall, no special outlet needed.Pretty much set and forget once you have it tuned to the correct temps for your boards. If you do feed in too many boards one after the other, you can easily see the temps drop and adjust your feed rate but chances are if you have a board with a fair bit of parts you won't reach that limit. Usually only happens if I have a simple board (160x130mm) with only 20ish parts and try feed them with a spacing of say ~15cm between them.It's definitely much better than a drawer style reflow oven which can have hot spots.You can join the PNP owners discord to chat with others there that have the IN6:https://discord.gg/evEhjKee
34980A D-Sub 50 cables and connectors  - Page 1
Forum section: electronics / general

author: law
author_rank: Regular Contributor
timestamp: August 20, 2025, 01:10:11 am
content: Howdy,I picked up an Agilent 34980A and a few modules to build out part of my testing setup.I'm in the process of designing an interface board to the rest of my kit, but am struggling somewhat with the connectors.These units use 50 pin, 3 row D-Sub connectors. Looking at Digikey, they are pretty expensive to buy pre-made cables. Even the IDC push fit connectors for flat rainbow cables are $50 a pop.Can anyone recommend another source?I have actually bought some solder cup connectors that were reasonably priced, so I might just end up soldering a million wires.Thanks
Murata BLM18 Ferrite Bead Footprint Recommendations - Page 1
Forum section: electronics / general

author: Robert.Adams
author_rank: Contributor
timestamp: August 12, 2025, 02:40:06 am
content: Hello,I've been looking at this for a while and I'm starting to wonder if I've gone crazy or read something wrong. On a part like Murata's BLM18PG471SZ1D(https://www.digikey.com/en/products/detail/murata-electronics/BLM18PG471SZ1D/7363239), it appears the recommended land pattern is narrower than the width of the part. Wouldn't this lead to a poor fillet when reflowed? Is this probably just a mistake?Attached are the relevant spec pages and footprint mockup. I've just never heard of 0.8mm wide terminals put on 0.7mm wide pads.

author: Simmed
author_rank: Frequent Contributor
timestamp: August 12, 2025, 07:10:54 am
content: packing density level D ?

author: PartialDischarge
author_rank: Super Contributor
timestamp: August 12, 2025, 08:39:51 am
content: I use the BLM18PG with a 0603 resistor footprint

author: thm_w
author_rank: Super Contributor
timestamp: August 13, 2025, 09:39:47 pm
content: Capacitor but same idea:https://www.murata.com/en-us/support/faqs/capacitor/ceramiccapacitor/mnt/0008Quotehttps://ele.kyocera.com/en/product/capacitor/ceramic/mlcc-handling/mounting-01/https://fedevel.com/forum/schematic-design-pcb-layout/17290-footprints-for-an-0603-resistor-from-three-different-vendors
Remote controllable oven or hotplate - Page 1
Forum section: electronics / general

author: mwbajor
author_rank: Newbie
timestamp: August 02, 2025, 02:44:36 pm
content: I'm calibrating a device over temperature and I'd like to automate it. I'm very familiar with using an environmental chamber and programming temperature profiles but for this application I'd like to simply just put the testboard on a hotplate and increment the temperature with my test script. Does anyone know of a "Ethernet controllable hotplate" or a small oven where temperature can be set remotely via serial, USB, Ethernet, etc? I've looked but haven't seen anything.

author: David Hess
author_rank: Super Contributor
timestamp: August 02, 2025, 03:07:44 pm
content: I think you will need common heat plate and separate programmable temperature controller.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: August 02, 2025, 03:35:47 pm
content: I've seen plenty of projects to modify toaster ovens for reflow soldering, and a bunch of them have WiFi and can be controlled by a phone.For the rest, sourcecode of a bunch of them is available, so controlling it via a serial port can't be very difficult.And remotely programmable thermostats are also quite common.

author: mwbajor
author_rank: Newbie
timestamp: August 04, 2025, 12:38:56 am
content: Thanks.Both of these ideas crossed my mind; I have a modified toaster oven and that seemed like a good idea, but its setup to run a profile. The hotplate and temperature controller is more along the lines that I was thinking.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: August 06, 2025, 05:25:28 am
content: Huh?If you oven is "setup to run a profile", then it has an uC. And if it's DIY, it's easy to put some other firmware in it which adds remote control. Or just add a second controller board in parallel to the original.
Help with Reflow Profile – TC1796 BGA Reball on FR-1418 (Ball Non-Wetting Issue) - Page 1
Forum section: electronics / general

author: techpreist747
author_rank: Newbie
timestamp: August 07, 2025, 05:20:08 pm
content: Hi all,I'm currently working with a Hakko FR-1418 BGA rework station to install a TC1796 32-bit TriCore Microcontroller onto a PCB as part of a reballing repair process. I’ve attached the current thermal profile I'm using for reference.Setup details:Machine: Hakko FR-1418Component: TC1796 (BGA package)Solder balls: 63/37 Sn/PbFlux: AMTECH NC-559-ASM, thin layer applied to PCB only (no solder paste)Issue:I'm seeing that some of the balls are failing to wet to their respective pads on the PCB. The BGA appears slightly skewed in some instances as well. I'm trying to determine if this is due to:-Insufficient soak or peak temperature-Improper ramp rate-Flux degradation or insufficient application-Possible oxidation or contamination on the BGA or PCB terminalsI’d appreciate any guidance on how to adjust the profile or process. Has anyone worked with similar packages or had success with a known-good reflow recipe on the FR-1418?Happy to provide more data, images, or logs if that helps.

author: DavidAlfa
author_rank: Super Contributor
timestamp: August 07, 2025, 09:21:23 pm
content: The balls look too round, probably the gnd pads in the center are not melting.When it melts properly the ic will fall down as the balls get flatten by the weight.Is "teach target" the desired temp at the IC? 205°C is too low! Set it to 240 or so, even more for lead-free.

author: Accu-Sembly
author_rank: Contributor
timestamp: August 07, 2025, 10:43:39 pm
content: I also think a target of 205 is too low and would aim for 10 degrees higher. I would use a mini stencil and apply solder paste either to the board or to the balls.The profile seems long and slow enough, but that's entirely dependent on the thermal mass of the PCB itself. I was going to check our FR-1418 for a similar profile, but the computer is acting up and I don't feel like dealing with it at the moment.

author: techpreist747
author_rank: Newbie
timestamp: August 11, 2025, 04:13:33 pm
content: I originally had the peak reflow temperature at 240C, This was necessary for removal as a higher temperature helps weaken the conformal coat underneath for the vacuum to lift the BGA from the board without lifting pads. With installation however, the time above liquidus state is to long and just resulted in the balls collapsing and shorting between the terminals.I will try raising the peak reflow temperature to 215C instead of 205C and report back my findings.

author: wraper
author_rank: Unknown
timestamp: August 11, 2025, 04:18:22 pm
content: Quote from: techpreist747 on August 11, 2025, 04:13:33 pmTotally wrong conclusion. Balls will never short due to too high temperature, staying in liquidous state too long. It happens due to PCB or chip deformation/warping. The only reason reducing the temperature 'helps' is that some balls do not melt, thus prevent squeezing of the balls where PCB to chip distance is the smallest.
Keyboard overlay - where to buy? - Page 1
Forum section: electronics / general

author: matherp
author_rank: Contributor
timestamp: August 02, 2025, 06:59:53 pm
content: I'm developing a little handheld computer based on the RP2350. The design will be completely open-source and personally I don't sell anything - I just do it for fun but others often take up my designs and supply them on a hobby basis. I need to find someone to manufacture a keyboard overlay, presumably silicon, for the little keyboard that the computer will use. The layout is based on one of the Chinese mini bluetooth keyboards available through Aliexpress but uses discrete tactile switches rather than domes or membrane. Can anyone recommend a Chinese supplier who can do this sort of low volume custom prototyping at a sensible price. Pic is of the prototype keyboard which is scanned directly by the RP2350 together with the keyboard from the bluetooth version.Thanks
Neoden 4 PNP machine: Connector pinout  - Page 1
Forum section: electronics / general

author: rew
author_rank: Contributor
timestamp: July 19, 2025, 12:55:01 pm
content: Both on the "front" and "back" there are 5 pin connectors that allow an automated production line. Of course they want you to buy the units from neoden, but I was thinking about making a simple small version myself of the input side.(I have PCBs that take about 10 minutes to populate. So then I need to be present EXACTLY at the moment one PCB is done and the next one is wanted, to push in the next PCB. If I have a PCB-pusher that responds to the machine requesting the next PCB using the signalling on the connector, then I could load the next PCB at any point in the 10 minutes that the machine needs to populate the previous board. )Does anybody know the pinout of that connector?

author: Kean
author_rank: Unknown
timestamp: July 20, 2025, 09:41:39 am
content: I cannot help with pinouts, but it likely follows the SMEMA standard. With some trial and error, you can probably figure the pinout.The SMEMA spec (attached) specifies a 14 pin connector, but only 4 pins are actually used for a pair of opto-isolated signals (10mA). You might find only one signal is implemented.

author: rew
author_rank: Contributor
timestamp: July 20, 2025, 10:28:59 am
content: On the output side there is a similar 5 pin connector. Neoden provides an "output rail" with a small module on it. That module has a couple of leds that light or not in the presence of a board. That wouldn't be possible with (just) this interface.But knowing what to expect allows some measurements. (with less chance of breaking things).
Buy equip from China now or wait? - Page 1
Forum section: electronics / general

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: June 20, 2025, 09:31:10 pm
content: About $19k USD worth, should I buy now or wait? I haven't been keeping up with all the latest news on the topic.

author: RoGeorge
author_rank: Super Contributor
timestamp: June 20, 2025, 10:22:43 pm
content: I'll buy now. The future is more uncertain than ever. Israel just started a war with Iran a week ago, and since then, both USA and China moved a military fleet in the region (or so I've heard). Also, Russia and NATO will probably engage, too.For now, it looks like the warmongers want to push us all in a WW3, no matter the consequences.

author: wemme
author_rank: Regular Contributor
timestamp: July 17, 2025, 12:25:33 am
content: I think the answer to this is greatly dependent on where in the world you are, your local industry around you and your market segment.This will be unique to pretty much anyone here.Where I am everything comes out of China, There are no local PCB manufacturers anymore or component warehousing.When WW3 kicks off, I suspect I will be pretty much up $#!t creak.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: July 17, 2025, 03:01:25 am
content: What are your arguments for buying now or waiting?Uhm, ah, you're from the US, with that orange guy at the top.Saving up some money and emigrating seems to be the best option.
Is there any manufacturer took over Optibox enclosure? - Page 1
Forum section: electronics / general

author: ipsych
author_rank: Newbie
timestamp: July 16, 2025, 06:58:50 am
content: Dear all,I am looking for the Knurr optibox 5000 series enclosure. (exactly the one in the second photo).Knurr told me they discontinued long long ago, but I guess some company took it over and still making it.As far as I know, some companies still sell new device using the same enclosure.https://ifdalivestorage.blob.core.windows.net/user-uploads/404/17212/00000000-0000-0000-0000-000000000000/01_Optibox_5000_Gehaeuse-System_0001.jpghttps://i.ebayimg.com/images/g/z8YAAOSwDmdh~sBt/s-l1200.jpgAnybody familiar to this ABS enclosures, and know where to order some?

author: Gribo
author_rank: Frequent Contributor
timestamp: July 16, 2025, 04:01:41 pm
content: OKW, Bopla and Hammond might have similar cases. What is the PCB size, and what is your internal mounting method for this PCB?
Acrylic Touch Panels - Page 1
Forum section: electronics / general

author: SMTech
author_rank: Frequent Contributor
timestamp: July 02, 2025, 10:12:21 am
content: Does anyone have a manufacturer of custom acrylic (e.g PMMA) * backlit capacitive touch keypads/panels they have worked with who communicates well and produces a good finished product?*Not a floppy adhesive sticker, a ~3mm sandwich of membrane and panel.Ideally working direct with the factory, the issue we're having is the disconnect and delays by having a European intermediary who seems to have way less influence, input or pushback on problems than you would expect, plus interminable delays to sort them out.

author: night
author_rank: Newbie
timestamp: July 03, 2025, 08:40:09 am
content: I can recommend Eltas from Slovenia. (https://www.eltas.si/en/home/).They are experts in the membrane keyboards and foil overlays. With them we have made both prototypes and small volume and also high volume (2-4k pcs per year).Apart from membrane keyboards and foil overlays, they handle CNC machining of both off the shelf enclosures and also custom metal parts. Also optical bonding of the LCDs.You can visit them and their factory in Slovenia. Also, they are visiting Electronica in Munich and Embbeded World in Nurnberg so you can visit them there.Like I said, they are experts and they have helped us many times with design. That, reliability, lead times and delivery, with which we never had issues, justify price difference compared to Chinese (around 20% to 50% in our cases).

author: SMTech
author_rank: Frequent Contributor
timestamp: July 10, 2025, 08:52:43 am
content: Thankyou night. On the face of it they might not do the stackup we are after in this instance, but good suppliers of machined & finished fascia's are also useful to know.
Thermal putty experience - Page 1
Forum section: electronics / general

author: law
author_rank: Regular Contributor
timestamp: June 27, 2025, 01:59:01 am
content: Howdy,Does anyone have any real world experience with thermal putty?I currently use a thermal pad that I cut to shape with a die. This process is pretty painful, so I'm going to get some LiPoly S-putty2-s to try out.I want to use it on motor controllers (etc), so exposure to vibration is probable. My heatsinks are also not closed on one end. I dont want it to drip out, though the point of the putty is that it wont do that....The datasheet also talks of the putty requiring homogenization before dispensing. Would blasting in in the ultrasonic be suitable?It comes in a dispensing tube, so hand mixing is not really suitable.Thanks

author: law
author_rank: Regular Contributor
timestamp: June 27, 2025, 09:39:40 am
content: According to the manufacturer, using the ultrasonic for homogenization is ok
Essemtec CSM7000+ - Data angle 2 error, machine does not place components - Page 1
Forum section: electronics / general

author: bpjl
author_rank: Contributor
timestamp: May 13, 2025, 03:51:59 pm
content: Hi,I need help with a CSM7000+ device. I know it's a very old device and not many have dealt with it, but I'm hoping for some guidance in solving the problem.Until recently, everything worked fine and I was able to place components on the PCB without any problems. After a break of about 2 months, I wanted to resume work and, unfortunately, there was a problem - the machine can not place any component. It takes a component from the feeder, drives the nozzle to a position above the PCB, then throws the component into the trash. Any element, no exceptions.It appears that the laser is unable to scan or interpret the size or position of the component held by the nozzle. I checked the graph in Options/Debug - it looks fine. The nozzles move gently and smoothly.After enabling “Infos (status window)” in Options/Debug, I get an error message - “Data angle 2” - when trying to arrange the elements.Two months ago there was no such problem, and during this time the machine stood unused.I will be grateful for any help.

author: bpjl
author_rank: Contributor
timestamp: June 17, 2025, 08:13:27 am
content: For posterity:In an effort to get to the cause of the problem, we tried everything that this, after all, age-old machine allows. We were tearing our hair out because everything seemed to be OK.Then, in a final attempt (or act of desperation), I decided to start all over again. By that I mean restoring the system, along with all the software, from a disk image I had dumped on the same day we first booted the machine.And what worked. The machine starts up without a problem, lays out the components without a problem and finishes the job without a problem.Trembling with the subject, I checked the drive in the computer controlling this Essemtec. Well, and of course it screwed up bad sectors. I bet that one of them planted errors in the configuration files or prevented them from being read. And hence the whole mess.The disk was immediately replaced. On this new one again I restored all the soft from the image. Since then, everything works elegantlyTranslated with DeepL.com (free version)
Multipole brushless DC motor manufacturing - Page 1
Forum section: electronics / general

author: thm_w
author_rank: Super Contributor
timestamp: June 12, 2025, 12:53:59 am
content: That hole in the wall CNC shop at 9:20 is great.edit:https://www.freerchobby.cc/is their site

author: Whales
author_rank: Super Contributor
timestamp: June 12, 2025, 02:14:23 am
content: Neodymium is a heavy metal. It's nice to see they're using oil to prevent powder from machining becoming airborne. I am very worried about the workers that are covered in dark marks from touching and handling it constantly :'( It's not safely ingestible like Fe or Al powder.
Recommendation on PCBA (incl. China) for advanced PCB prototype  - Page 1
Forum section: electronics / general

author: linux-dude
author_rank: Newbie
timestamp: June 03, 2025, 04:50:07 pm
content: Hi,We're about to order a few 8L prototype boards with BGAs and some traces with RF (5GHz on top layer) that require proper impedance control. We also need component sourcing and assembly and want everything done under one roof.I have used WinPCB before and was quite happy with them, but rumors say they have changed and might not be up to par anymore, hence i look for alternatives.Turn around time and quality is of essence. I prefer China due to lower cost (and usually better turn around times), but am open for alternatives.Thanks in advance for your advice!

author: Psi
author_rank: Super Contributor
timestamp: June 04, 2025, 09:02:50 am
content: PCBway could probably do it, but you'd have to talk to them.They are not just for hobby projects. They do small/medium run production too.(I've not used them for impedance control but there is an option for it)

author: Accu-Sembly
author_rank: Contributor
timestamp: June 04, 2025, 05:45:30 pm
content: Are the components readily available from manufacturers and/or major brokers? That has a much larger impact on lead time than the labor. What you are requesting is exactly what we do, but being US based we are probably more expensive than similar work elsewhere, certainly if you went to China.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: June 15, 2025, 10:56:08 pm
content: 8 layer boards does not seem very special these days. I guess there are plenty of manufacturers who can do that (What's your track / clearance, controlled impedance etc...)But if you were happy with WinPCB, then I would not change it just because you heard some rumor form somewhere on the internet.If you are running any sort of production environment, you should have samples for continuous quality control in place anyway. Have you had any issues with WinPCB yourself?
Kayo-1706-3Dsg - Page 1
Forum section: electronics / general

author: Alex69_69
author_rank: Newbie
timestamp: June 07, 2025, 07:11:50 am
content: Hello, everyone! Estb is such a setup, it was launched a couple of times. It's not properly calibrated, the axes are inverted, and the cameras aren't showing correctly. I want to update the software to the latest version. Has anyone had any experience?

author: law
author_rank: Regular Contributor
timestamp: June 10, 2025, 03:18:17 am
content: Hey, your message is a bit confusing. I don't know what Estb is.Anyway, the manufacturer is reasonably responsive. You can try emailing them for the latest version of the software.
Buying magnets - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: June 05, 2025, 12:18:19 am
content: I need to buy magnets to use with a sensor. Small (4mm) diametrically magnetized neodymium. Does anyone have a preferred vendor for magnets? I'd love a pretty detailed spec sheet so I can simulate it correctly too.

author: shabaz
author_rank: Frequent Contributor
timestamp: June 05, 2025, 12:52:02 am
content: MPS sell them,https://www.monolithicpower.com/en/mag10-2c-40-25.html(I have not bought from MPS, I've only bought one-offs from Amazon with no spec).

author: Accu-Sembly
author_rank: Contributor
timestamp: June 05, 2025, 03:41:51 pm
content: We have used K&J Magnetics in the past and were happy with them.

author: thm_w
author_rank: Super Contributor
timestamp: June 05, 2025, 09:10:02 pm
content: Digikeyhttps://www.digikey.ca/en/products/detail/radial-magnets-inc/9049/6030786I've used aliexpress ones for hobby purposes.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: June 09, 2025, 01:39:02 am
content: You probably want to stick them on the back of a steel shaft...Once I read an AN about gluing some plastic in between the magnet and the steel shaft. If you stick the magnet directly on the shaft, it sucks up a part of the magnetic field. But I guess that most often it's simpler to just glue a bigger magnet on the shaft.Simulations probably don't make much sense. You would have to know how strong your magnets are, and how much influence there is from the shaft and such. But it's quite easy to experiment at which distance the sensor starts giving wrong signals. And then you can calculate a usable range from the datasheet. Matthias Wandel (from Woodgears) did some nice experiments with such sensors.
Hughes HCD125 Capacitor Discharge Welder - Page 1
Forum section: electronics / general

author: voltsandjolts
author_rank: Unknown
timestamp: December 05, 2024, 02:30:45 pm
content: I believe this capacitor discharge welder was first designed and sold by Hughes Corp but was subsequently sold under other brand names, Palomar and Micro-join. They pop up on ebay every so often. Although heavy and bulky, they're nicely built and the electronics are simple enough that any required repairs should be relatively easy. The double-pulse output works very well, cleaning up the workpiece with the first hit, then full weld with the second. Both pulses have programmable energy and I find that 20 then 40J works well for battery tabs. In essence, they're well built work horses that make perfect battery tab welds every time.The capacitor bank is 4 x 1500uF 250VDC which dumps into a very nice custom output transformer. The output winding is 5 turns of 10mm x 5mm solid busbarThere are also various primary taps, selected by the large front panel 'pulse width' knob.The HCD125 (Hughes Cap Discharge 125 Joules) has bigger brothers with higher output capability, the HCD300 and 1000. I think the only differences are larger capacitor bank and output transformers. The electronics look to be very similar if not identical, so expect slower cap bank recharge time on larger models.I have attached a partial schematic which I reverse engineered from a HCD125, might help someone else save one of these units. If you do, tell us about it here!

author: voltsandjolts
author_rank: Unknown
timestamp: December 05, 2024, 02:34:30 pm
content: Pictures:

author: vagabond63
author_rank: Newbie
timestamp: June 04, 2025, 11:36:19 am
content: We have three HCD300 Micro join and a Hughes system as well. Wondering if you could recommend a modern version?

author: voltsandjolts
author_rank: Unknown
timestamp: June 04, 2025, 12:43:42 pm
content: The HCD series might be old, but they still work well. You don't say why you need a newer version, or what you want to weld, so I can't recommend any specific welder.It sounds like you're asking on behalf of a business, in which case I would recommend getting in touch withAmada Miyachi. You can send them samples of what you want to weld and they will recommend the right kit for the job. Yes, their equipment is expensive but IME it lasts for years on busy production lines.
Hand soldering CLGA - Page 1
Forum section: electronics / general

author: arc12
author_rank: Newbie
timestamp: June 08, 2025, 02:32:25 pm
content: I'm used to hand-soldering SMDs with legs down to TSSOP with 0.65mm pitch and design PCBs with longer pads. I'm currently looking at pressure sensors with ceramic substrate such as LPS28DFW, which has a LGA pattern. In this case, there are only 6 pads, which are 0.9mm wide (two are actually 1.4mm wide) and 0.35mm deep (ignoring the centre pad, which is just connected to the case). Although the dimensioned drawing doesn't give a direct measurement, arithmetic gives a 0.1mm wide margin of the ceramic substrate between its edge and the pad start.I'm wondering whether it would be feasible to use a PCB footprint where there is exposed PCB solder pad extending say 1.5mm outside the package and expect soldering success due to molten solder flowing along the PCB pad and onto the device pad. Plenty of flux, of course! Or would the ceramic material provide too much barrier?My hunch is that it would probably work for the pad widths given above, but probably not for CLGA-10 packages, where the device pad widths mean that the pcb pad would be too narrow to conduct enough heat to the joint.Hoping that someone on here has practical experience...

author: loki42
author_rank: Frequent Contributor
timestamp: June 08, 2025, 02:41:47 pm
content: Do you have a hot air gun? Probably easier to just use paste and hot air. I did a bunch of rework many years ago where I made a tiny stencil for one part and then pasted using it. You can just squeeze out the paste too.

author: thm_w
author_rank: Super Contributor
timestamp: June 09, 2025, 09:27:52 pm
content: I don't think that would be reliable. Just use a hot air gun as recommended above.You should use paste, but, if you don't want to you can just tin the pads with regular solder and then flux, put part, hot air.
KAYO A4 Experience - Page 1
Forum section: electronics / general

author: borisans
author_rank: Newbie
timestamp: May 31, 2025, 03:06:17 am
content: Hello fellow SMTers.I just purchased and took delivery of a Kayo A4L for personal use. Having known that this is a Chinese machine and not an Essemtec or Yamaha, which I also have vast commercial experience with, I knew there would be some 'hairs' on it for the price, and I do like the 4 heads. The GUI has blatantly obvious spelling and other faults and disjointed references with it, these are leftovers that have never been addressed from previous models, the machine was not calibrated at all and I didn't even get a password to get into the program. To me this portrays a sloppy attitude by the manufacturer and an overall uncaring culture. Having said that, the machine is reasonable and does a pretty good job, still some funny calibration issues though.The worst part is that the front PCB conveyor rail had a dent in the profile which could only have been done while the profile was sitting on the ground and not in the machine. Kayo fitted this rail regardless of it being damaged. When I sent Jenny from Kayo an email I got the typical Chinese fob-off that the short crease in the aluminium rail profile was damaged by a 3-ton forklift, strangely though the wooden packaging box didn't have a scratch on it, all the high-speed cameras and every other delicate part in the machine was perfectly intact. In other words, I felt they had my money and had no more obligation to me. I also felt that I was being treated like I was stupid to believe a forklift could have hit the machine. I offered to fit a new rail if they sent me a new one (pittance) but avoided by Kayo. To me Kayo washed their hands of their warranty and responsibility.My advice: If you go with Kayo, be prepared to receive a damaged, uncalibrated, short on improvements machine that will become your problem if something is damaged or not functioning.

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: June 02, 2025, 12:30:21 pm
content: Usually these machine are packed with the wooden pallet outside just beside the trucks that will be shipping them. So the forklift actually carry these machine naked prior to the wooden pallet being built around it. Pretty sure somewhere during this process, the parts get damaged. Kayo don't actually designed these machine....
JLCPCB or any other  DRU clearance issue with manufacturers library component  - Page 1
Forum section: electronics / general

author: Kjelt
author_rank: Super Contributor
timestamp: June 14, 2025, 05:40:17 pm
content: Hi, never had this issue before with a standard imported library.But there is a first time for everything.Have a throughhole 2 rows x15 pins 1.27mm pitch header connector and the problem is:Pinsize is 0,63mm with metalthrough drillsize is 0,667mmThe DRU rules state 0.2mm metal for the pad around the hole and 0.2mm clearance betweenpads.Then with 1.27mm pitch you can never satisfy the dru rulesIf I import the component in the library editor then it has 0.1mm clearance which is too little.Tried to edit the library and make the pads a smaller so clearance is ok but copper around the drill hole is too low.The moment I use that component in Eagle it adjusts the pads to the DRC and pads have not enough clearance.Has anyone an idea what I can do about this ?I tried the library for Samtec, 3M and 2 other companies, all the same result.Or if someone has a libray for this component that passes I would really appreciate it.Example of the part, not specifically this company but as example:https://www.digikey.com/en/products/detail/w%C3%BCrth-elektronik/62703021621/21066550Thanks,

author: Kjelt
author_rank: Super Contributor
timestamp: June 17, 2025, 02:16:34 pm
content: Ok got it uploaded to JLCPCB, had to reduce the drill diameter and kill all the DRU requirements that were overprotective.Hope JLCPCB can produce it without too much problems.....

author: thm_w
author_rank: Super Contributor
timestamp: June 17, 2025, 10:15:32 pm
content: If you use 0.7mm hole, 0.9mm pad diameter, you have about 0.36mm between pads.To bring that to 0.2mm gap, then you end up with about 1.06mm pad diameter, annular ring of 0.18mm.Its a bit annoying to solder when the copper pad is small, but JLC will have no issue producing it.
PCBWAY 55% markup - Page 1
Forum section: electronics / general

author: HighDesert
author_rank: Newbie
timestamp: May 19, 2025, 02:19:07 am
content: Hello allJust a heads up and I'm sure many already know, but for those of you that don't, PCBWAY boards are a 55% markup because of Tariffs. I'd ordered 10 High Temp boards for a prototype awhile ago and it took them some time to make and I got hit with a 55% markup and had to pay DHL an extra $176 on top of the $318 I paid PCBWAY. Also I got a screenshot of other markups in case you're thinking of buyinganything elsethere....

author: Jeroen3
author_rank: Super Contributor
timestamp: May 19, 2025, 06:26:12 am
content: You do know this is because they ship DDP and your government wants a larger take?

author: H.O
author_rank: Frequent Contributor
timestamp: May 19, 2025, 08:38:19 am
content: Oh, so tariffs makes the price of the imported product higher for the consumer - who knew...

author: HighDesert
author_rank: Newbie
timestamp: May 19, 2025, 02:39:18 pm
content: Yes, I state because of Tariffs in my post. I guess I should've prefaced this with "For those of us that live in the United States of America". The rate that other items are being marked up may not be crystal clear though, that's why I included it on the attachment. SMT is 45% and CNC is 65%. This is more of a reference for anyone from the USA in case they want to see things like that.

author: jduncan
author_rank: Regular Contributor
timestamp: May 19, 2025, 06:08:55 pm
content: Consider yourself lucky, for several weeks JLC was collecting 175% surchage for tariffed shipments...

author: themadhippy
author_rank: Super Contributor
timestamp: May 19, 2025, 06:28:32 pm
content: According to your glorious leader you shouldn't be paying the tariffs,china is the one payingoops sorry hes changed his mind,again, china should eat the tariffs

author: Doctorandus_P
author_rank: Super Contributor
timestamp: May 20, 2025, 11:11:38 am
content: Saw it on a billboard:The problem with political jokes is that they sometimes get elected.
Why is there an abnormal sound from the Amphenol 84740-102LF connector - Page 1
Forum section: electronics / general

author: ssundermc
author_rank: Newbie
timestamp: May 16, 2025, 01:18:14 am
content: I'm currently soldering two 84740-102LF (1.27mm pitch, 400-pin) BTB connectors onto a PCBI used 0.76mm lead-free ball, and use small brush to evenly apply flux to the PCB pads and connectorsWhen the ball reaches molten state, Just nudged the connectors with tweezers, and they snapped back. Kept heating for 15 seconds,then let it cool. So, I gave it a quick look and everything seemed fine. Then I went to install the V100 GPU, tightened the screws, and snap - heard something break. I took it apart again, and nothing looked off. The second time went in without a sound And no shorts after measuring. Is that weird?So, I've checked the mounting height, and it's all good

author: thm_w
author_rank: Super Contributor
timestamp: May 16, 2025, 09:48:38 pm
content: Some of these high density connectors explicitly recommend against using more than one connectors on a PCB, as you'll have misalignment between the two, then when they get plugged in that creates force sideways, and maybe a snapping sound as the plastic edge is shifted.Though I don't see anything in the documents below, and plenty of people still ignore these warnings.https://cdn.amphenol-cs.com/media/wysiwyg/files/documentation/gs-12-100.pdfhttps://cdn.amphenol-cs.com/media/wysiwyg/files/documentation/datasheet/mezzanine/mezz_megarray.pdf
OKI Reaches New Heights With a 124-Layer PCB - Page 1
Forum section: electronics / general

author: JoeRoy
author_rank: Regular Contributor
timestamp: May 15, 2025, 09:46:57 pm
content: https://www.allaboutcircuits.com/news/oki-reaches-new-heights-with-124-layer-pcb/

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: May 16, 2025, 03:47:51 pm
content: Can you imagine designing the PCB that requires 124 layers?

author: Gyro
author_rank: Super Contributor
timestamp: May 16, 2025, 04:21:02 pm
content: Can you imagine the reflow profile?!

author: BadeBhaiya
author_rank: Regular Contributor
timestamp: May 17, 2025, 09:29:22 am
content: Just what we need, something to encourage BGA package designers to reduce the pitch yet again. You have a 124 layer board, why are you complaining?
DHL Suspending some deliveries article - Page 1
Forum section: electronics / general

author: phil from seattle
author_rank: Super Contributor
timestamp: April 20, 2025, 06:18:34 pm
content: https://www.ft.com/content/13428bb2-3ccd-453f-a5c7-608b4f5721f4It looks like anything over $800 USD in value. Will this insanity never end?

author: TimFox
author_rank: Super Contributor
timestamp: April 20, 2025, 06:36:25 pm
content: That’s the previousde minimusvalue for US tariffs.

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: April 20, 2025, 09:14:55 pm
content: Quote from: TimFox on April 20, 2025, 06:36:25 pmThis probably has to do with the elimination of de minimus for at least Chinese tariffs, at least until they figure out paperwork. Just my guess though.

author: Fflint
author_rank: Frequent Contributor
timestamp: May 10, 2025, 09:10:56 am
content: Why would you not post a link people can actually read...https://archive.is/20250420150104/https://www.ft.com/content/13428bb2-3ccd-453f-a5c7-608b4f5721f4

author: jfiresto
author_rank: Frequent Contributor
timestamp: May 10, 2025, 09:18:29 am
content: I thought the suspensionhad been lifted.

author: phil from seattle
author_rank: Super Contributor
timestamp: May 13, 2025, 04:30:09 pm
content: Quote from: Fflint on May 10, 2025, 09:10:56 amIt is still readable. Maybe it's your problem.

author: phil from seattle
author_rank: Super Contributor
timestamp: May 13, 2025, 04:32:32 pm
content: Quote from: jfiresto on May 10, 2025, 09:18:29 amWhen I posted, it was in (or going to be in) effect. Looks like it was lifted 10 days later.
MOVED: EE Needed – KiCad Schematic & PCB Layout – Paid Project, Ready to Go - Page 1
Forum section: electronics / general

author: Halcyon
author_rank: Unknown
timestamp: May 11, 2025, 05:43:39 am
content: This topic has been moved toJobs.https://www.eevblog.com/forum/index.php?topic=461138.0
Automatically Testing an FPGA Carrier Board - Page 1
Forum section: electronics / general

author: jamfletch
author_rank: Contributor
timestamp: May 23, 2025, 10:28:07 am
content: I have designed a carrier PCB for a very expensive FPGA plug-in module which includes a few peripherals, voltage regulation etc for the FPGA. I'm trying to figure out some way to test the carrier board isn't going to blow up the FPGA, and that all the peripherals and the connectors to the FPGA itself have been soldered down properly etc.I'm thinking of designing a 2nd PCB that would mount on the carrier in lieu of the expensive FPGA and have a JTAG accessible uC on + some form of LED indicators etc to make sure the input voltages are all okay. The uC would then toggle the IO lines through the connector - via the JTAG interface controlling it.Just wondering if anyone has done this sort of thing before and had any success?

author: jduncan
author_rank: Regular Contributor
timestamp: May 23, 2025, 10:40:11 am
content: Sounds like overkill.Design the carrier in such a way that test points can be used to enable and check the supply voltages without the FPGA inserted, and do the rest of the tests using it.

author: aeg
author_rank: Regular Contributor
timestamp: May 23, 2025, 11:35:43 pm
content: Check the FPGA connector voltages on 1pcs with a voltmeter to validate the design and avoid frying the module. Then upload a self-test bitstream to the FPGA and let 'er rip.
Neoden YY1 PnP machine: Unable to detect SOIC part - Page 1
Forum section: electronics / general

author: mj97
author_rank: Newbie
timestamp: February 27, 2025, 02:35:19 pm
content: Dear all,I recently bought a Neoden YY1 PnP machine for my work place. I am try to test the placement of the ICs on my board. I am using the bulk feeder area for SOIC-8 package component, and when I program the feeder, the camera is not able to recognize the component properly. I have attached an image for reference. I tried adjusting the camera thresold, but no luck.Has anyone faced this problem? Could you please suggest me what I can do to make it work? I know there were some issues with bigger ICs but it was strange to see that the camera could not recognize even SOIC-8. Maybe I am doing something wrong.Thank you in advance.Best regardsMJ

author: newto
author_rank: Regular Contributor
timestamp: February 28, 2025, 02:00:03 pm
content: Its more designed to work with loose passives, since it can't read orientation. You can maybe tweak the light brighter and the threshold higher, but you can see it detects "10" parts because it thinks each leg is a different component. It's a very low tech vision system, just works off contrastIf you're getting these parts loose, rather than in cut tape, my suggestion is push them in a corner of the trays to index them in the same location and orientation, and have the nozzle pick them up normally from the same coordinates each time.Definitely more fiddly of a setup, but try to get future ICs in tape so that you can just use the cut tape holders. In fact, if you happen to have empty tape of the same package size, you can load the parts back in the tape (or if you have access to a 3d printer, make a new tray with smaller pockets that can only fit one part)

author: GerardG
author_rank: Regular Contributor
timestamp: May 02, 2025, 10:18:47 am
content: It is a bit of trail and error, but got good results with SOIC-81. You can try to change the threshold value in the Parameter page.2. Also try this on a different spot in the machine. The first row catches more external light.