hybridfree/eevblog-posts huggingface dataset:
Need advice for a Turbomolecular vacuum pump - Page 1
Forum section: electronics / general

author: ImABeginner
author_rank: Contributor
timestamp: August 18, 2020, 04:14:43 pm
content: Hello, I'm not sure where to go, so I hope that someone on here has some advice. I recently acquired an Osaka TC-1810 turbomolecular vacuum pump, and a TC-1813 power supply. I managed to get the manuals for the two, and it says that I'm supposed to use "NTL-F" oil for the oil reservoir. I've only found one instance of this "NTL-F" oil, and it was on yahoo japan. I'm wondering if anyone would know what oil I could substitute in lieu of this unfindable oil? Thanks much!

author: Kleinstein
author_rank: Super Contributor
timestamp: August 18, 2020, 04:43:55 pm
content: The pump looks pretty large and expensive.The demands on the oil can be pretty high, as it needs to be very low vapor pressure (depends on the application for the pump - some systems can tolerate more and other types of oil vapor). The bearings run pretty fast and often relatively hot and need good lubrication too. Different bearing may need different oils. A wrong oil can damage the bearings / pump. So best get the real oil from the original manufacturer, even though the oil probably cost a pretty penny (e.g. more expensive than snake oil). A least it should not need much - way less than with a diffusion pump.Chances are this would be some special silicone based oil.

author: ImABeginner
author_rank: Contributor
timestamp: August 18, 2020, 05:24:31 pm
content: Yeah, At least there are distributors in the US. 230$ for a single refill.

author: richnormand
author_rank: Unknown
timestamp: August 18, 2020, 07:57:42 pm
content: Contact Dunniway:https://www.duniway.com/about-us(no affiliations etc....)That is usually where I end up for vacuum related stuff. Last time they did not have the bearing for my turbo but they steered me at the right place.They did have the replacement filaments for my ionisation gauge though.Some turbo are quite particular about the right oil. Also, looking at the size make sure it is well fastened with the correct mounts to your bench after initial rotation testing.In one lab I remember a turbo on the floor across the room that ripped up all its vacuum (mobile station with a flexible on top, not bolted to a vacuum chamber) and electrical connections when a rotor blade failed in the middle of the night. They have a lot of energy stored at full speed.

author: ImABeginner
author_rank: Contributor
timestamp: August 18, 2020, 08:48:05 pm
content: No kidding, before I spin it up, all the blades are *FILTHY* and I'm finding a way to clean them off properly.
Pan and rotate preheated PCB? - Page 1
Forum section: electronics / general

author: lukego
author_rank: Frequent Contributor
timestamp: October 20, 2020, 03:25:14 pm
content: I would really like to be able to smoothly pan and rotate a PCB while I am working on it over a preheater. Does anyone have a solution to this? What do you do?I have one partial solution: aswiveling platethat the preheater (FR-830) and PCB holder (Omnivise) can rest on top of. Like a "lazy susan." This seems a good start but the surface is too small and it only solves rotation and not panning the view.The idea that I have is to fix a larger plate on top to increase surface area. I'm wondering if I could solve the panning problem by sandwiching two such plates on top of each other with some lubricant in between? Then I could rotate the bottom plate and pan the top plate independently. I wonder what material I should be looking for here e.g. steel?Curious to hear ideas and experiences!
Machining acrylic  - Page 1
Forum section: electronics / general

author: kaevee
author_rank: Regular Contributor
timestamp: October 02, 2020, 01:35:35 pm
content: We needed one off part for a product we were developing. We machined acrylic to manufacture the part.

author: chris_leyson
author_rank: Super Contributor
timestamp: October 02, 2020, 02:22:24 pm
content: Nice job, like the polished finish.I remember polishing 45 degree chamfers on a piece of acrylic to use them as mirrors, was part of an optical Wheatstone bridge.

author: kaevee
author_rank: Regular Contributor
timestamp: October 02, 2020, 05:50:12 pm
content: Quote from: chris_leyson on October 02, 2020, 02:22:24 pmWe could have done without polishing. But, my colleague was concerned about the look of unpolished part.

author: coppercone2
author_rank: Super Contributor
timestamp: October 03, 2020, 02:43:40 am
content: how did you polish that for a optical circuit? I have done it for cosmetic reasons by going through sand paper then going through automotive polishing compounds with many steps, and it looked good, but time consuming. However it was all salvage so it saves me money (150 to 3000 and 4 different compounds on around 20 substantially sized pieces (between 1.5x1.5 feet to 12x2 inches) !!!!). Oddly enough my shop vac caught on fire a month later.fyi going through all the steps is very annoying and its worse to work with then wood IMO. If you work with plexiglass that is old and needs polishing, don't plan too many things at once that need to be refinished or it will be a painful experience. Non transparent plastics polish wonderfully though.You might get better results if you invest in acrylic polishing compounds and abrasives, rather then using automotive stuff.... but its not an appealing investment for me at the moment.This kit looks interestinghttps://www.rockler.com/turning-finishing-kit?country=US&sid=V91040&promo=shopping&utm_source=google&utm_medium=cpc&utm_term=&utm_content=pla&utm_campaign=PL&tid=pla&gclid=CjwKCAjwn9v7BRBqEiwAbq1Ey32zt6NtWOlE_qfelMXMcjBqWZFJLoiIngtyv8l8Xp00H54q3IuWlBoCgiMQAvD_BwEI imagine combining that with the Novus compounds might be a good betI know that youtube guy that does all the cryogenic experiments is not happy with polishing plexiglass either (applied science)
Weller TC201 finally bites the dust - Page 1
Forum section: electronics / general

author: precaud
author_rank: Frequent Contributor
timestamp: August 14, 2020, 06:19:28 pm
content: It was bound to happen at some point. I bought my WTCPN station in 1983. I has been on my bench and used almost every workday since then, with nothing but tip replacements (and very few at that). A couple years ago I bought a TC201 replacement heater in anticipation of the original one failing. It finally happened on Wednesday. Station powered up and no heat. Heater pins measured open. With great pleasure, I replaced it.37 years. I think this qualifies as amazing service life.

author: eeviking
author_rank: Regular Contributor
timestamp: August 17, 2020, 02:15:00 pm
content: The old simple ones are hard to kill. I would guess the magnetic switch contacts would also be worn by now?My first Weller was a EC2002 "digital" station. It's 27 years old now and still working. Although it's been sitting on the shelf since I upgraded to a WX2
Kelvin SMD Tweezers to DMM Banana Connector - Page 1
Forum section: electronics / general

author: Trader
author_rank: Frequent Contributor
timestamp: August 12, 2020, 09:38:10 pm
content: How can I use the "SMD Tweezers case (TL-22)" in a regular DMM?I want to keep it original and do an adapter to the DMM banana connector.Who to connect the wires?Thank you.

author: thm_w
author_rank: Super Contributor
timestamp: August 13, 2020, 08:36:41 pm
content: Make two short cables:- Female shrouded banana jack on one end- Normal banana plug on the other end (or shrouded if you want, but its not needed).then connect those to two of the terminals (whatever red and black wires are connected to).Something like these:https://www.aliexpress.com/item/32924620653.html

author: bob91343
author_rank: Super Contributor
timestamp: August 13, 2020, 10:46:58 pm
content: Can you give a link to these tweezers? I made my own but they aren't as slick as I'd like.You can buy Kelvin clips very cheaply but they aren't very good, with grips that don't grip well.

author: Trader
author_rank: Frequent Contributor
timestamp: August 14, 2020, 05:16:18 am
content: https://www.amazon.com/5000-Handheld-LCR-Meter-accessories/dp/B00S298KJO/These tweezers come from the LCR DER DE-5000, I want to keep it original, but make an adapter to be able to use it with my DMM.

author: bob91343
author_rank: Super Contributor
timestamp: August 14, 2020, 06:11:54 pm
content: I did some research and they want too much money for what I think should be a simple thing.I guess I will live with what I have.
ksger v2.1v  coil whine - Page 1
Forum section: electronics / general

author: vamdolly
author_rank: Newbie
timestamp: August 12, 2020, 10:26:12 pm
content: Hi i have some coil whine on my ksger v2,1s here is a link to the photoshttps://imgur.com/a/NlJVpMBits the smaller one by mains arrow in photo, so i would like to know if anyone els has this issue and if its fixable by replacing the part or fixing it, it whines when idle vary low once a tip is on and its heating the tip it whines loud eough to give me a headack after 10-20m. never had this with anyother iron in my life so not sure if this is normal for t12 tips as this is my first newer tip style one.
SMTmax reflow oven: AS-6070    Opinions, issues? - Page 1
Forum section: electronics / general

author: smoothVTer
author_rank: Regular Contributor
timestamp: August 03, 2020, 03:16:57 pm
content: My company needed a reflow oven with large internal area and decided to go with a company called SMTmax ( over my judgement ) , oven model number AS-6070Does anybody have experience with this specific oven? Good impressions, bad impressions?One issue we have right off the bat is their 120V version of their oven uses the same plug as their 240V version. Both the 240V and 120V versions use a NEMA6-50R plug. This plug if used in standard way is 1 Ground and 2 Hots, 180 degrees out of phase for total of 240V. Seems we have to wire our lab with this same plug but with 1 Ground, 1 Hot and 1 Neutral for 120V service, but do not know if the wide blade is hot or if the short blade is hot. Response from the company's rep to this question is nonsensical and they obviously have no idea about AC power.Posting here in hopes somebody might have insight into this.

author: tooki
author_rank: Super Contributor
timestamp: August 05, 2020, 09:55:58 am
content: That’s crazy. I mean, what if someone already has a normally-wired 6-50 receptacle in their lab, and when they plug in the 120V unit, it just goes up in smoke...(That’s why the old “life hack” of using regular NEMA 1-15 plugs for loudspeakers was, and is, a terrible idea: next thing you know, someone has plugged a speaker directly into 120V AC...)

author: smoothVTer
author_rank: Regular Contributor
timestamp: August 05, 2020, 01:00:18 pm
content: Agreed.However, does there even exist a 50A 120V NEMA plug/socket? My google searches have not yielded much.Its a 3600W oven so for 120V that's 30A, necessitating a higher amperage plug and I guess the NEMA 6-50 was convenient to use for them. Still we're getting an electrician in there today; I am envisioning lots of eye rolling.

author: tooki
author_rank: Super Contributor
timestamp: August 05, 2020, 07:01:20 pm
content: Quote from: smoothVTer on August 05, 2020, 01:00:18 pmReally? They’re right in the image in the nomenclature section ofhttps://en.wikipedia.org/wiki/NEMA_connectorNEMA 5-50
ebike battery - Page 1
Forum section: electronics / general

author: m3vuv
author_rank: Super Contributor
timestamp: August 05, 2020, 06:12:03 pm
content: Has anyone tried one of these?:https://www.ebay.co.uk/itm/Lithium-48V-36AH-Ebike-battery-pack-100w-hgh-power-charger-new/353136397671,looks too cheap for the ah,what do people think of it,just be good to get folks thoughts on it.

author: Gyro
author_rank: Super Contributor
timestamp: August 05, 2020, 06:19:34 pm
content: Please don't double post!https://www.eevblog.com/forum/projects/views-on-a-battery/You posted it twice within 2 minutes.
USB - CAN bridge needed! Maybe use STLINK v3? - Page 1
Forum section: electronics / general

author: TrickyNekro
author_rank: Frequent Contributor
timestamp: August 05, 2020, 06:28:16 am
content: Hi!I would like to find a nice USB to CAN bridge for a small project of mine. Problem is that most of them are either cheap clones from China with dodgy driversor 200+€ parts, money I don´t want to give since I do not have right now a serious and heavy automotive project that needs to be fool proof.I´ve seen that STLINK V3 has a USB - CAN bridge. It still needs the phy chip but that not a really serious requirement, that´s a couple hours project.Plus you get a programmer for some very popular microcontrollers!Can anyone confirm that? Has anyone used that? Does anybody know even if there is an api available (windows mostly) for such a thing?Thanks in advance!
Interesting inductive-sensing DJ mixer teardown/reverse engineer/modification - Page 1
Forum section: electronics / general

author: rasteri
author_rank: Contributor
timestamp: July 09, 2020, 01:29:59 pm
content: I recently toredown a strange old DJ mixer, the Vestax Samurai.The weird thing about it is its crossfader - instead of being a traditional potentiometer, it's a chain of air-core inductors that vary their inductance based on the position of a metal plate mounted to the wiper.The control circuit measures the phase angle relationship between adjacent coils and uses that to determine the wiper position.This value is then fed to the address lines of a ROM, which then uses an R2R ladder to output the final VCA control voltage. The ROM includes various curves and patterns which are user-selectable, but not terribly useful to most DJs.I made a video about the whole process, and even wrote a script to generate some aftermarket ROMS to make the patterns somewhat more useful.

author: Bassman59
author_rank: Super Contributor
timestamp: July 09, 2020, 08:37:23 pm
content: Quote from: rasteri on July 09, 2020, 01:29:59 pmIt seems as if this is intended to get around a very real problem with DJ mixers -- the crossfader gets abused and soon becomes scratchy or non-functional. That's why the crossfader is mounted in an easily-removable holder so it can be swapped out without disassembling the whole mixer.This kind of mechanism seems to be immune to that sort of failure.How well it works otherwise is a different story.

author: thm_w
author_rank: Super Contributor
timestamp: July 10, 2020, 12:43:31 am
content: 11:00 in the video, if anyone wondering, it slides across the coils. Was confused at first because I thought it would be a rotary pot.Very cool mechanism.I suspect a modern version could use a capacitive touch style slider?

author: rasteri
author_rank: Contributor
timestamp: July 10, 2020, 12:21:21 pm
content: Quote from: thm_w on July 10, 2020, 12:43:31 amThere is one company making capacitive faders, the AudioInnovate innoFADER -http://www.innofader.com/products.php?id=21- it's a super nice product that uses digipots to simulate a real potentiometer and can be used as an aftermarket fader in pretty much any mixer.Other companies' contactless faders generally use hall sensors and a permenant magnet, but they're mixer-specific and can't be used as a replacement part in other mixers.

author: cdev
author_rank: Super Contributor
timestamp: August 06, 2020, 02:17:07 am
content: It would really suck to be a DJ and to constantly be worried about the cross fader potentiometer carbon pots wearing out. Also, I bet that is the thing, more than anything else that leads to mixers being retired from service.

author: mc172
author_rank: Frequent Contributor
timestamp: August 06, 2020, 02:26:38 am
content: Nice video, cheers.
KSGER soldering iron from amazon store? - Page 1
Forum section: electronics / general

author: somedude
author_rank: Newbie
timestamp: July 15, 2020, 05:34:25 pm
content: what are peoples' thoughts on the KSGER amazon store? I've heard the best way to avoid a knockoff iron is to buy from the aliexpress store, but ordering from amazon would be nice since it's easier to return. do you expect the amazon store to be legit and avoid knockoffs, or do you think it's better to go to aliexpress?also, I think I'm going to get the V2.01. what are folks' thoughts on the 3.1s? I've read here in the forums that it seems like mostly display updates.

author: aix
author_rank: Regular Contributor
timestamp: July 15, 2020, 07:36:21 pm
content: This?https://www.amazon.com/sp?seller=AERRVM3FYX381What jumps out at me is that they are selling extremely low volumes (only 35 ratings over the last 12 months) and have a fairly low customer satisfaction rating (~90% overall, much lower recently).Also, there's no way to tell whether this store is in any way affiliated with the manufacturer.

author: somedude
author_rank: Newbie
timestamp: July 15, 2020, 09:17:40 pm
content: that was my thought. seem a bit sketch, but it's also weird for KSGER to not have an amazon presence.

author: Acecool
author_rank: Regular Contributor
timestamp: August 04, 2020, 11:31:58 pm
content: Contact KSGER on Aliexpress and ask them for their Amazon store page. IF they say they don't have one - link them to it. Or just ask them if the linked page is owned by them - if not... someone is using their branding and their name on Amazon and they can take them down.
Agilent 54831M - Page 1
Forum section: electronics / general

author: bostonman
author_rank: Super Contributor
timestamp: August 02, 2020, 11:33:33 pm
content: I acquired an Agilent 54831M scope.Channel two and three don't work when in 50ohm mode. From research, it seems someone may have exceeded the maximum input voltage and blew the input amplifier.The channels work fine in 1M ohm mode (or seems to work fine). I contacted one person who repairs scopes and he said the repair cost would exceed the value of the scope.Is anyone familiar with this issue and know where to get parts and/or how to fix it?

author: 0culus
author_rank: Super Contributor
timestamp: August 03, 2020, 02:54:24 am
content: Well, if the channels work nominally at 1 meg, I would think the amplifiers probably survived. However whatever HP was doing for the 50 ohm termination inside is probably toast instead.
TS80P Battery - Page 1
Forum section: electronics / general

author: gigavolt
author_rank: Contributor
timestamp: July 26, 2020, 11:16:54 am
content: What are other people using?I bought a Ravpower 26800 mAh one which is PD 30W, but I'm a bit of an idiot since when I plugged it in today I realized it doesn't support the 12V/3A charging mode needed for 30W on the soldering iron. It does work in 9V/2A mode, but that limits me to a measly 18W.Has anybody been able to get 30W out of a battery with this soldering iron? I'm having a hard time finding a compatible battery and manufacturers are pretty opaque about what technologies they support.

author: KL27x
author_rank: Super Contributor
timestamp: July 27, 2020, 08:56:24 pm
content: I would use a prebuilt lipo pack. They're dirt cheap because of the RC vehicle market. 100+A output, many different voltages. Then I'd charge it with my bench PSU. Or you could build your own dedicated charging circuit and power it with a switchmode brick.
TL866IIplus: website safe? - Page 1
Forum section: electronics / general

author: PerranOak
author_rank: Frequent Contributor
timestamp: July 30, 2020, 03:37:23 pm
content: I've just received a TL866IIplus and Googled their website: xgecu.com.I'm not sure if it is a safe site as my AV software said to use caution.Doe anyone have experience of downloading stuff from there?Cheers.

author: ercapoccia
author_rank: Regular Contributor
timestamp: July 30, 2020, 05:45:54 pm
content: In my experience is safe

author: PerranOak
author_rank: Frequent Contributor
timestamp: July 31, 2020, 09:43:52 am
content: I checked on VirusTotal and it said it was safe so thank you for your confirmation.However, I submitted the url (www.xgecu.com/MiniPro/XgproV1027_setup.rar) for the setup file for the TL866 to VirusTotal and it gave:G-Data: MalwareThen I sent the downloaded file to setup Norton Utilities and it gave:Dr Web: Trojan.DownLoader16.54553Are these all false positives?

author: ercapoccia
author_rank: Regular Contributor
timestamp: July 31, 2020, 06:09:24 pm
content: What i do when i have a doubt i just i run a virtual machine and i do things from there. The software would run just fine from a VM

author: PerranOak
author_rank: Frequent Contributor
timestamp: July 31, 2020, 09:16:42 pm
content: Ah. How do you do that?

author: ercapoccia
author_rank: Regular Contributor
timestamp: July 31, 2020, 10:39:34 pm
content: You can install a free vm manager like Virtual Box o VMWare and create a virtual machine inside your computer and install windows on it. So if anything happens it will affect just the virtual machine and not your main OS
"Plus" in Quick hot air product numbers? (957DW+ vs 957DW, etc) - Page 1
Forum section: electronics / general

author: Dave8266
author_rank: Contributor
timestamp: July 28, 2020, 06:49:20 pm
content: "Quick" question, sorry for the pun.Does anyone happen to know what the plus "+" means on semi-recent Quick hot air station product numbers?For example, the 957DW+, verses the 957DW.The "D" designates the digital display/control, and I gather from another thread ("Quick Review: Quick 957 Analog Rework Station") that the "W" means it has a brushless motor instead of brushed.But the plus vs non-plus is elusive - not even Quick's website has the answer.Thanks

author: thm_w
author_rank: Super Contributor
timestamp: July 28, 2020, 10:56:34 pm
content: https://www.eevblog.com/forum/reviews/quick-review-quick-957-analog-rework-station/25/Looks like they've changed the control board inside but from the outside no major differences.Probably depends on the model #.

author: Dave8266
author_rank: Contributor
timestamp: July 30, 2020, 12:31:47 am
content: So I sent an email to Quick USA, and received a reply that the only difference between the plus and non-plus, was that the plus used a different fan motor.Which (and thanks for your reply by the way), seems to slightly contradict the linked thread that shows other internal changes.
arc formation/conductivity on brushed aluminum? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: July 26, 2020, 05:54:01 am
content: I notice most aluminum inside of things has a brushed texture.Is this just for cosmetic and cost reasons, or is it specified this way for any electrical reason, i.e. if a wire comes loose and hits the chassis, its more likely with aged chassis to arc when its brushed vs sanded/polished, because maybe oxide is more likely to flake off from a brushed surface?I'm not exactly sure about old/contaminated aluminum behavior in this case.

author: ChristofferB
author_rank: Frequent Contributor
timestamp: July 27, 2020, 12:16:15 am
content: That sounds too loosely defined to be practical use.I'd think either cosmetics or whatever finish the process happens to make.Aluminium can also be anodized without dye for that natural macbook like finish.Not completely sure what texture you mean, though.

author: coppercone2
author_rank: Super Contributor
timestamp: July 27, 2020, 01:28:06 am
content: its pretty random but most test equipment has some kind of brushing/sanded look (like you took a heavy wire wheel to the material to make it look scratched up). On the insides I mean.steel is smooth galvanized. I mean aluminum equipment. Particularly big things with cards (DSA, SA, big signal gens, etc). I guess RF/Microwave gear is built like this alot. Unpleasant on the hands and dislikes paper towels. low MW cans (the cheap ones, not the machined ones) and interior brackets, etc.. seem to do this alot. But PSU does it also (i.e. sorensen)
Particle accelerator beam monitor teardown - Page 1
Forum section: electronics / general

author: ChristofferB
author_rank: Frequent Contributor
timestamp: July 25, 2020, 01:44:31 pm
content: Hia!I was given a beam monitoring ion chamber, which I thought would be interesting to share.This has been used on a medical proton/electron beam linac, placed in the ion beam to monitor both current and beam position (both X-Y pos and focus, probably).It's a 2 kg chunk of copper (or copper plated stainless steel? uncertain.It's held together by a bolt circle, half on either side, since it consists of 2 identical halves, for redundancy. For medical radiation stuff, they take dose calculations VERY seriously.A lot of ports can be seen around the rim of the device, each half has three orbitally welded mil-style 4-pin bayonet connectors and a gas fill port.The fill gas is usually just dry air, as moisture content changes the sensitivity. A positive pressure also gives a higher sensitivity, as there are more gas molecules to be ionized.Basically this instrument just uses electrometers to measure the current between opposing plates.Cracking open the two halves, all the electrode elements are seen. there is a copper gasket, with a central foil soldered on mounted between the two halves, sealed by a knife-edge sinking into the gasket from each side, like on high vacuum flanges.Here both halves are seen.I won't pretend to understand what the different elements does but I think what you want is the same current reading in all 4 D shaped electrodes, and in the two crossing thin central ones, to indicate the beam is centered.The ratio between the current in the outer and inner electrodes could also be used to estimate the focus on the beam. Just as light, particle beams can be either a narrow, very intense beam or a more diffuse spread cone of 'light'.Some of these elements, which is printed on mylar foil by the way, could also be guard electrodes to avoid leakage.I assume there is a common plane electrode covering the entire area underneath, raised to some high voltage, but I didn't dig deeper this time around.I was actually hoping the electrometer frontends would be in the device, so I could fire it up. Looks like I'll have to wait until I get a decent electrometer.Either way what an interesting device! Hope you thought so tooThe position of the chamber in the linac can be seen here:https://www.researchgate.net/profile/Charles_Able/publication/51954861/figure/fig2/AS:213900541861898@1428009271446/Schematic-diagram-of-a-typical-medical-linear-accelerator-reproduced-from-Van-Dyk-J.png--Chris
age of the safe? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: July 23, 2020, 02:42:04 am
content: https://science.slashdot.org/story/20/07/20/2153224/a-new-artificial-material-effectively-cannot-be-cutbut, does it hold up to a diamond metal cutting wheel and some wd40 ? ($15.99 at lowes). it seems to defeat friable things well, so maybe CBN would work.

author: cliffyk
author_rank: Frequent Contributor
timestamp: July 23, 2020, 05:22:04 am
content: What about a BFH (a REALLY BIG one)...

author: coppercone2
author_rank: Super Contributor
timestamp: July 23, 2020, 10:14:58 pm
content: oh, big fucking hammeri don't actually know what happens if you strike something hard plated with a hammer. What would happen to an anodized aluminum block? does it actually crack off? spalling?

author: Marco
author_rank: Super Contributor
timestamp: July 23, 2020, 11:01:13 pm
content: Would have preferred a comparison against manganese steel.

author: bill_c
author_rank: Regular Contributor
timestamp: July 23, 2020, 11:56:39 pm
content: Mercury and time.
Effects of zoom range in stereo microscopes. Large v small - Page 1
Forum section: electronics / general

author: AlfBaz
author_rank: Super Contributor
timestamp: July 20, 2020, 06:37:06 am
content: I've given my current AmScope microscope head a large knock whilst moving it and thrown the alignment out. The result is now an uncomfortable double image.The advice from various microscope repair shops is to replace the head.So now that I'm looking for a replacement I thought it might pay to "upgrade"Currently the zoom range I have is 3.5x - 45x which, along with my 0.5x Barlow lens and 10X/20 eye pieces, give me a good working distance and reasonable zoom range.For a few dollars more I can get a 3.5x - 90x zoom range but I don't know what, if any, are the trade offs.I don't need the x90 for pcb inspection and work but thought it may come in handy for other subjects.If however, going to a larger zoom range impacts the former purpose then I'll leave it as is.Any thoughts?

author: KL27x
author_rank: Super Contributor
timestamp: July 22, 2020, 12:01:13 am
content: ^Sounds like you're confusing your marketing wank.Your saw is probably 7x-45x zoom. When you put the 0.5 barlow on it, it is now 3.5x-22.5X zoomThat fancy scope for a little more money is probably just a 7x-45x zoom head (same zoom as your old one) that comes with both a 0.5x and a 2x barlow.How often did you remove your 0.5x Barlow to get a higher zoom? Probably never. But if you did, you would have to reduce your rework height roughly in half.. but because the barlow lens is no longer sticking out, you don't lose all of that rework height. When you want to double your zoom again, by putting on the 2x barlow, you again half your working height, plus you stick this lens on the end. I.e., no working room to solder, at all.

author: AlfBaz
author_rank: Super Contributor
timestamp: July 22, 2020, 06:18:39 am
content: Just had a look and you are absolutely correctThe 3.5x-45x only comes with a 0.5x barlow the 3.5x-90x comes with 0.5x and 2x barlow.Looking at the rest of the similar heads with varying or greater zoom ranges I can see it's simply a different combination of Barlow lenses and eye piecesI have got to stop shopping at 3am
DIY weller WMRP/WMRT soldering station project (open source) - Page 1
Forum section: electronics / general

author: nexus
author_rank: Regular Contributor
timestamp: July 16, 2020, 04:47:27 am
content: Hi all,Thought I'd share a writeup I did on an open source project I built. I wanted to use a nice set of Weller hot tweezers for small SMT rework but did not want the compatible boat anchor station. I found this open-source alternative that was a fun project by itself and could be built on the cheap too! The project repository is linked in the article.https://neonkev.com/2020/07/16/diy-weller-wmrp-wmrt-soldering-station-open-source/Cheers

author: thm_w
author_rank: Super Contributor
timestamp: July 16, 2020, 08:43:25 pm
content: Nice clean build.Is it using the two heaters in series and one thermocouple?Relevant link:https://www.eevblog.com/forum/reviews/whats-inside-weller-wmrt-tweezers/25/

author: nexus
author_rank: Regular Contributor
timestamp: July 17, 2020, 02:34:35 am
content: Thanks. I'm a little OCD, so the final assembly took wayy to long.This design uses a dual mosfet and dual auto zero op amp; each heater is being monitored and cycled independently. Attached a photo of that part, the entire circuit diagram is online here:http://kair.us/projects/weller/weller_driver_v11_circuit_diagram.pdf
COZ 858-d report. - Page 1
Forum section: electronics / general

author: jr219
author_rank: Newbie
timestamp: July 14, 2020, 02:01:52 pm
content: I ended up purchasing this use as my first Hot Air Rework station.https://www.amazon.com/gp/product/B01MR2IWBNAs expected the following was wrong with it:1) Poor Soldering on the grounds.2) Neutral and Hot were reversed, where neutral went through the fuse and to the board while the hot went to the board all the time.Very poor soldering jobs on everything inside. Poor Heat shrink.I corrected the hot/neutral issues and re-did the grounds with crimped rings and it seems to work well at this point.The front and rear panels were plastic so no grounding possibilities there.Overall, about what you would expect for a $40 unit, but it will meet my needs and I'm comfortable with it at this point but will still leave it unplugged when I'm not actively using it!
Yihua catalogues - Page 1
Forum section: electronics / general

author: de_light
author_rank: Regular Contributor
timestamp: June 10, 2020, 06:25:32 am
content: If anyone's interested, I was sent the latest Yihua catalogue with their offerings in today.Hosted links as pdfs too largehttps://drive.google.com/file/d/1mjlSfKrTlkycAxwKluQKP5aClOrW938_/view?usp=sharing

author: thm_w
author_rank: Super Contributor
timestamp: June 12, 2020, 08:35:58 pm
content: I like how they feel the need to make multiple iterations of the exact same 2-in-1 station and just put it in different sized cases.993D basic 1300W looks interesting.But seems like its been around for a while and the "full" version is super cheap already:https://www.circuitspecialists.com/yihua_993d_professional_soldering_station_with_vacuum_suction_pen.html

author: robertson.alan@gmail.com
author_rank: Contributor
timestamp: June 13, 2020, 06:11:18 pm
content: HIhttps://www.circuitspecialists.com/ya_993d_professional_soldering_station_with_vacuum_suction_pen.htmlThat listing is years old, i called them about it. one off to get rid of it. The 993d+ is around £400Alan

author: MarkMLl
author_rank: Frequent Contributor
timestamp: July 08, 2020, 09:13:49 am
content: I'm getting an error on that link at gofile.io, does anybody have a permanent one?I'm not seriously considering buying anything from them- at least this month-, but an overall list of the different models and variants would be useful.MarkMLl

author: de_light
author_rank: Regular Contributor
timestamp: July 14, 2020, 05:04:45 am
content: Quote from: MarkMLl on July 08, 2020, 09:13:49 amLink updated.

author: MarkMLl
author_rank: Frequent Contributor
timestamp: July 14, 2020, 07:08:00 am
content: https://drive.google.com/file/d/1mjlSfKrTlkycAxwKluQKP5aClOrW938_/view?usp=sharingThanks for that.MarkMLl
Quick 861DW HotAir owners - Your settings? - Page 1
Forum section: electronics / general

author: coy
author_rank: Contributor
timestamp: July 11, 2020, 10:24:41 pm
content: Hi,I just got a Quick 861DW and it works like a charm for de-soldering parts with many pins.Also I soldered my first board with LEDs, a few ICs and some 0603 parts - it works fine.For soldering I used the biggest nozzle which came with the Quick (about 8mm diameter), so I heated / soldered the whole board (42mmx9mm) almost at once.I used solder paste with lead (Sn62Pb36Ag2), temperature set to 300 Celsius (572 F), Airflow set to "20".But as I am a hot air beginner, I am uncertain if these settings (temp & airflow) are good, or if I should e.g. increase temperature, so the solder procedure would be quicker? With 300 C I started with a few cm distance to the board to do some kind of "preheating", then moved the nozzle about 1cm over the parts until the solderpaste melted (it took about 5s).So if you are a more experienced Quick 861dw owner, it would be interesting if you have some proven settings you could share.RegardsMarkus
TL866A universal programmer v6.8x - Page 1
Forum section: electronics / general

author: PerranOak
author_rank: Frequent Contributor
timestamp: July 07, 2020, 10:03:14 am
content: For anyone with a TL866A: what is the latest firmware version?I’ve heard that v6.8x bricks it and wanted to check before buying.Cheers.

author: rasteri
author_rank: Contributor
timestamp: July 09, 2020, 03:02:45 pm
content: I'm on 6.85 and it hasn't bricked mine yet
Removing live and neutral wires from connector? - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: July 06, 2020, 08:16:03 pm
content: Hello,I have one of these LED ceiling lights in my shower room.https://www.eterna-lighting.co.uk/product/shfullwh/#more-infoIt no longer works.I wish to change the driver. However, first I need to disconnect the live and neutral wires from the connector. Do you think I have to poke something into the little holes in order to remove the live and neutral wires?Pressing down on the lever things doesnt allow any wires to be removed.I dont yet have anything non-conducting and small and thin enough to poke in there, but will buy something if readers think that will work._____________-------------------------------------______________________________Also, the Driver is BREL-2D-24THC (12W, 125mA, 200-240VAC in)I cant seem to find this anywhere on the web. I dont suppose you may know of this one?

author: themadhippy
author_rank: Super Contributor
timestamp: July 06, 2020, 08:27:30 pm
content: Quotemake sure the powers off,double check,and try a straightened out paper clip,however often there a 1 time use,so just get the side cutters out,cut the wires and replace the terminal block

author: Gyro
author_rank: Super Contributor
timestamp: July 07, 2020, 09:02:34 am
content: That looks like a dual output block - you should be able to cut off and safely isolate the wires (heatshrink) and push the new wires into the second pair of holes. As themadhippy says though - they should release with a suitable probe. It would be good practice to use the other pair of holes anyway as they really are intended to be single use.
Mystery microscope - Page 1
Forum section: electronics / general

author: Zbig
author_rank: Frequent Contributor
timestamp: July 02, 2020, 10:06:18 am
content: While researching various budget-ish digital microscope options, I came across this on my country's go-to e-commerce site:https://allegro.pl/oferta/cyfrowy-mikroskop-16mpix-full-hd-z-monitorem-10-6-8980198512That price amounts to some $645What I find interesting:Seems rather slick, properly engineered and integrated, i.e. no nonsense like loose wires everywhere, splitting USB power between the camera and LED light with a Y-cable, light dimmer on a cable and then an IR-remote for some other functions, etc.The opticsseemlike they mean business (going by what looks like a relatively large metal lens barrel)What lights up all kinds of red lights for me:I've failed to find any kind of any meaningful mentions of this gear apart from the rather useless manufacturer's web page where they don't seem to be able to make up their minds whether the thing is actually called WD-I106L or WD-I1600L:http://welldu.cn/index.php?m=Product&a=show&id=22&l=enand some Indian site with the photo of the microscope set up in some dodgy-looking basement somewhere.The seller refused my request to send me the user's manual for some reason, pointing me to their YouTube channel with what is supposed to be the video file from this scope:where someone pans around some PCB for five minutes with no context whatsoever that leaves you none the wiser as of what the useful working distance is, what's the lag, etc.Has anybody come across this microscope anywhere? Is it commonly rebadged as something else, perhaps?

author: PeterG
author_rank: Frequent Contributor
timestamp: July 02, 2020, 12:28:59 pm
content: This looks like a good start.http://welldu.cn/index.php?l=enRegards

author: Zbig
author_rank: Frequent Contributor
timestamp: July 02, 2020, 01:35:27 pm
content: Quote from: PeterG on July 02, 2020, 12:28:59 pmYup, thanks, already mentioned that in my original post. Looks like a good start and a dead end at the same time, unfortunately...

author: cdev
author_rank: Super Contributor
timestamp: July 02, 2020, 01:44:48 pm
content: Seems pricey for what it is.

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 02, 2020, 04:23:06 pm
content: nice and slick? maybe. but i will have a hard time looking at monitor that close, position not configurable thats bad for me. $600+ is more the cost of a brand spanking PC.
LPKF S63 The nightmare continues!!!!!!! - Page 1
Forum section: electronics / general

author: eetechTom
author_rank: Contributor
timestamp: July 02, 2020, 03:20:49 pm
content: Where do I start? First question, were the German "Engineers" involved with the ever reliable Mini Cooper, somehow employed by LPKF?My employer purchased a S63 machine 2 years ago. We have spent more time troubleshooting/rebooting, than actually making boards. We have the solder paste dispenser, but have never used it. I have seen recommendations to avoid that function at all costs. Random errors abound. Can't find camera, can't recognize milling head. The only cure is to reboot machine, or software, or PC, or all threeWe have tried a different PC (WIN 10), same issues. There are the rare occasions (1 out of 5) when it will do one or two boards w/o failing. Those occasions are quickly followed by a trip to the local carryout, to purchase a lottery ticket. Here are the failures encountered yesterday:1) Could not switch to "MillDrill", 2) Camera lost connection, 3) Machine Error, 4) Error occurred during tool exchange, 5) Internal application error.

author: eetechTom
author_rank: Contributor
timestamp: July 02, 2020, 03:45:08 pm
content: My intention was not to disparage all German engineers, only the LPKF, Mini Cooper crews.
How to change the display between °C and °F on Hakko 927 - Page 1
Forum section: electronics / general

author: rdagger
author_rank: Contributor
timestamp: June 20, 2020, 05:59:50 pm
content: How do you change the display between °C and °F on Hakko 927.I found the manual but I don't see any instructions regarding changing the units.

author: Shock
author_rank: Super Contributor
timestamp: June 20, 2020, 11:24:01 pm
content: My guess is it's probably set by holding a specific button in for a few seconds while powering on the station. To avoid accidentally going into something you are unsure of don't press buttons after this (but take note if the display reading changes), just power it off any try the next one. You can also try in combination with removing the card and holding a button while inserting it. If you get no luck try emailing Hakko USA.

author: rdagger
author_rank: Contributor
timestamp: June 25, 2020, 07:13:36 pm
content: I spoke with Hakko and their support was great!The conversion requires removing the PCB and desoldering the JF jumper and soldering the JC jumper. There is also only 1 LED to indicate units so it has to be desoldered and moved too.Hakko added a Knowledgebase article:http://kb.hakkousa.com/KnowledgebaseArticle11854.aspx
Ksger v2.1S i need help with choice offer  - Page 1
Forum section: electronics / general

author: kataklysm
author_rank: Newbie
timestamp: August 09, 2020, 11:30:41 pm
content: Hi, im looking for a ksger v2.1SI find nice offer in good price and in country near me, but on pictures the logic pcb looking different than others...It's worth to buy?https://a.aliexpress.com/_BTudqRThanks.

author: BlackICE
author_rank: Regular Contributor
timestamp: August 10, 2020, 08:24:35 am
content: I chose a different handle. I don't like that one because you have to turn a collar to change the tips.

author: kataklysm
author_rank: Newbie
timestamp: August 10, 2020, 09:45:07 am
content: Quote from: BlackICE on August 10, 2020, 08:24:35 amThx for answer, the handle is ok for me. I was made this topic because on photo is different logic pcb than i saw on this forum

author: BlackICE
author_rank: Regular Contributor
timestamp: August 10, 2020, 10:34:55 am
content: I wouldn't put too much emphasis on a photo. Many times I bought things on the internet where the product didn't match the photo. It is probably worse when you buy from China. You never know what you really get.
Fluke Bottle Opener, German engineered and produced - Page 1
Forum section: electronics / general

author: anotherlin
author_rank: Frequent Contributor
timestamp: January 15, 2020, 03:54:54 pm
content: Doesn't seem to be a joke:https://www.fluke.com/en-us/product/electrical-testing/insulated-tools/bottle-opener?utm_source=facebook&utm_medium=organic_social&utm_campaign=IG-NA-SIT-2020-BOTTLEOPENERS-USEN-SOC-1-A&utm_content=carousel&fbclid=IwAR2MvX8zQvOsy0W9XauJRiV7CJY2TFJiUo98j2KBJWe8Ua-sRp2T0crbbVc"Professional refreshment tool" and "German engineered and produced"If Mouser or Farnell stock them, then I'll spend the 13 euros to buy one !

author: bitwelder
author_rank: Super Contributor
timestamp: January 15, 2020, 04:11:52 pm
content: In German Wiha colors?

author: Gregg
author_rank: Super Contributor
timestamp: January 15, 2020, 06:49:59 pm
content: It is a re-badged made by Felo

author: calin
author_rank: Regular Contributor
timestamp: January 15, 2020, 07:55:03 pm
content: For those that want to have a Wera matching one .. just so it does not stand out from your toolset.. here you gohttps://www.amazon.com/05030005002-Bottle-Kraftform-Ergonomic-PRO-BEVERAGE/dp/B06WVK8S8FTested and approved, works best with German beers

author: tooki
author_rank: Super Contributor
timestamp: January 16, 2020, 03:37:22 pm
content: And for PB Swiss fans like me:https://www.shop.pbtools.us/Bottle-Opener-9000.htm

author: Gregg
author_rank: Super Contributor
timestamp: January 17, 2020, 12:16:15 am
content: I'm wondering when Dave will sell an EEVBLOG bottle opener. It looks like everybody elsemakesbadges them

author: jh15
author_rank: Frequent Contributor
timestamp: January 17, 2020, 03:03:36 am
content: I have Bang&Olufsen bottle openers from The Danish factory repair training instructor. (From the 70's before being bought out).

author: ben_r_
author_rank: Frequent Contributor
timestamp: June 22, 2020, 09:22:04 pm
content: Nice! I have the Wear one and have seen the Wiha one too. KCToolCo.com has all the German hand tool company versions.

author: coppercone2
author_rank: Super Contributor
timestamp: June 24, 2020, 01:37:32 am
content: you need a fake drill bottlenew work place directive : check multimeters for sloshing
How to find small surface mount "maintained" switches on Ali Express  - Page 1
Forum section: electronics / general

author: wassy
author_rank: Newbie
timestamp: June 20, 2020, 11:09:08 am
content: Hi,Can anyone recommend what search terms to use to find maintained / latching surface mount switches on aliexpress or ebay. The ones I mean are the ones you push down with your finger, it clicks and you remove your finger and the switch pops back up a little, but not the full way up and is now latched in the closed position. You push it down again, it clicks, you remove your finger and it now pops back up the full distance onto the open position.Every search term i use seems to just return "push button" or "tactile" switches, but of the ones that don't explicitly say "momentary" the rest either imply they are momentary or they don't explicitly say they are "latching" or "maintained" switches or push buttons. Am I using the wrong terminology or is it just cheap Chinese sellers not bothering to properly describe their products?I know lots of people will have strong opinions about ebay and aliexpress, and I do happily use rapid /Farnell when I have a big order I want to place or I know that I need quality parts, but for the most part I can't meet their minimum order price for odds and ends and when all I want is a 10pence button or set of resistors/caps. For us amateurs ebay and aliexpress are invaluable and if you are somewhat selective of who / what you buy then you can get great value stuff.

author: ralphrmartin
author_rank: Frequent Contributor
timestamp: June 20, 2020, 04:29:08 pm
content: Try "self locking" which is what some of the Chinese sellers seem to say for latching switches.

author: wassy
author_rank: Newbie
timestamp: June 21, 2020, 03:39:40 pm
content: That brought up a lot more relevant results. Thank you
effect of out of band light on photosensitive inks? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: June 21, 2020, 06:37:34 am
content: If you are doing UV exposure, does out of band light (inactive) have any effect on the ink in some kind of optical mixer process?I assume no but I don't fully understand the reaction because they add things like photosensitizers. I.e. yellow light + uv lightI assume there is no reason not to ...?