hybridfree/eevblog-posts huggingface dataset:
The COMPLETE Octopus (We all need a chuckle these days) - Page 1
Forum section: electronics / general

author: watchmaker
author_rank: Unknown
timestamp: May 02, 2024, 11:12:04 pm
content: Here is my final (?) Thai Curve Tracer with Octopus. It is now fully self-contained.Still a bench toy, but it is something to talk about.The two channel scope was $25 on Ali. Could not resist. It even has cursors and measurements!

author: watchmaker
author_rank: Unknown
timestamp: May 03, 2024, 03:11:21 pm
content: I'll be damned. This thing will display current waveforms up to 6 amps directly, without a current probe.If the Chinese are capable of releasing this kind of technology at this price, the USA should not underestimate them.https://h5.clewm.net/?url=qr61.cn%2FoyrJa8%2FqFWqgLHYou may need Google translate to read the page. The scale is extremely large but just scroll down to the videos on current measurement and function generator module. Fascinating and I am not chuckling.

author: kripton2035
author_rank: Super Contributor
timestamp: May 03, 2024, 03:37:48 pm
content: link for the mini scope please ?

author: KE5FX
author_rank: Super Contributor
timestamp: May 03, 2024, 05:26:16 pm
content: If you've ever seen a DJI quad, you already know not to underestimate the Chinese.Everything we hear about China was once said about Japan.... and I meaneverything.

author: watchmaker
author_rank: Unknown
timestamp: May 03, 2024, 08:14:39 pm
content: Quote from: kripton2035 on May 03, 2024, 03:37:48 pmPer request. Apparently I got a "special" price. But still; $33 Usdhttps://www.aliexpress.us/item/3256806666909439.html

author: coppercone2
author_rank: Super Contributor
timestamp: May 04, 2024, 08:05:29 pm
content: Quote from: KE5FX on May 03, 2024, 05:26:16 pmkeysight should lower prices a bitthe only thing is japan did not have neo communism, so it was more likely not to fail and have problems because of rampant corruption.but we do need to get rid of artifical price zones made around things like over 3 amps being nonlinearly more expensive. its a power electronics world right now. all the cool technologies that enable industry use power electronics. sensors and shit are important but so are the little motors. The tools, the cars, the automation built into machinery , drones... huge market and you need basically more then a amp to make them work.the only thing that can fight chinas huge labor advantage is massive automation to increase the capability of 1 individual using small motors.
What do I need to take better microscope images for optics inspection? - Page 1
Forum section: electronics / general

author: Hootis Tigglebits
author_rank: Contributor
timestamp: May 21, 2024, 03:40:44 pm
content: I have a cheap digital microscope with a C-mount lens. 95% of the time it's used for reworking PCBs, but sometimes my employer has me inspect small lenses for imperfections. We have an older stereo microscope (the lens on it says Nikon 5x and the eyepieces say 10x/20 and it has a fiber optic ring light.) that can easily see all kinds of imperfections which my digital one does not show. I know I need different lighting (see attached images), but what kind? I believe I also need a different power lens (my current one says it's 130X Magnification) because we have an older stereo microscope (the lens on it says Nikon 5x and the eyepieces say 10x/20) that can easily see all kinds of imperfections which my digital one does not show. How do I know what type of lens I need?What about this 8.3mp scope?https://amscope.com/products/c-hhd-aarm/?variant=/43603360809135

author: jfiresto
author_rank: Frequent Contributor
timestamp: May 21, 2024, 05:21:32 pm
content: What diameter are the lenses? What imperfections are you trying to spot and what size(s)?

author: Hootis Tigglebits
author_rank: Contributor
timestamp: May 21, 2024, 07:14:07 pm
content: I don’t have the exact measurements but the diameter of the lenses are about 6mm and the imperfections we look for are scratches which are thinner than a human hair and cannot be seen under a magnifying glass.

author: PlainName
author_rank: Super Contributor
timestamp: May 21, 2024, 08:02:11 pm
content: I think you want a single source light (that is, not a multi-directional ring light but more towards the laser end) which you can shine at different angles across the lens. A pure white light, such as from the Nikon, will be refracted by the scratch and make it easier to spot. LED ring lights tend to not have decent light in that respect.Got a hazy memory that a polarizer can be used - the scratch twists the light so using two sheets of polarizer, with the lens in the middle, can make the light viewed through it dark, except where the scratch lets it shine through.

author: jfiresto
author_rank: Frequent Contributor
timestamp: May 22, 2024, 03:00:47 pm
content: Quote from: Hootis Tigglebits on May 21, 2024, 07:14:07 pmI can not determine the required resolution of your inspection system from what you have written. Is that proprietary information?I expect a stereo microscope would trump a monocular, video microscope to distinguish contaminants from scratches.I am withPlainNamethat using the right lighting will be a big win. I think transmitted or reflected dark field illumination would be the bee's knees for inspecting lenses.This pageincludes some LED (reflected) dark field ring lights. Originally, they were all fiber optic.
Safety Ratings for Wire & Cable - lack of conformity marks - Page 1
Forum section: electronics / general

author: 6SN7WGTB
author_rank: Regular Contributor
timestamp: May 08, 2024, 07:14:45 am
content: Recently purchased some silicone insulated 8AWG stranded wire from eBay.It was sold with a specification stating "600V maximum voltage".On arrival, the wire has only "8AWG 200˚C" marked on the insulation.There are no Harmonisation, Third party approval, voltage or CPR marks.Turns out it's from China so under no circumstances would I use it for anything like the duty approaching that listed.Until verified otherwise, I would deem it safe only for ELV usage in my own personal environment.On contacting the UK seller for a datasheet, I am told "We have no datasheet".They insist that "This cable meets numerous certifications and has been tested up to the specified ratings to meet these approvals including UL".So far they are unwilling/unable to supply any UL information: as a minimum for UL "listed" I understand that the drum/reel/packaging should have some labelling at least.I doubt it meets UKCA or US NEC regulations.Can anyone comment? (Meanwhile I will flash test it as if I believe it should withstand at least 2.5kV for 600V rated).

author: tooki
author_rank: Super Contributor
timestamp: May 08, 2024, 07:56:28 pm
content: I mean…what do you expect from eBay? Unless it’s someone selling old stock of some name brand wire, with model number, eBay vendors just resell the crap they buy on aliexpress. (That’s assuming they’re not just a Chinese vendor themselves — some have warehouses in the west.)If you need wire with reliable certifications and whatnot, then buy name brand from a reputable distributor or directly from the manufacturer.

author: thm_w
author_rank: Super Contributor
timestamp: May 08, 2024, 09:53:14 pm
content: What is with people recently, buying random cable from ebay and expecting it to meet some rigorous specs. lol

author: Stray Electron
author_rank: Super Contributor
timestamp: May 09, 2024, 01:16:23 am
content: Quote from: thm_w on May 08, 2024, 09:53:14 pmFixed it for you.

author: jonpaul
author_rank: Super Contributor
timestamp: May 10, 2024, 05:56:49 am
content: That is AWM Appliance Wiring Material.Even if it had a CE/UL/TUV mark, if from China is illegal marking.We buy from Belden or otherUSA cable mfg.Avoid CCP junk!j

author: Faranight
author_rank: Unknown
timestamp: May 10, 2024, 06:11:23 am
content: Yeah, cables from china are just uuughhhh... I bought some 24 AWG for a LED project, and noticed that they were actually 26 AWG with thicker insulation.
For-A FA-440 digital time base corrector service manual? - Page 1
Forum section: electronics / general

author: AndrewEp17
author_rank: Contributor
timestamp: May 20, 2024, 10:56:43 pm
content: I have a for-a digital TBC from the late 80s or early 90s that i got off ebay for video bending (glitch art) and vhs tape backup. It works fine but i can't find the user manual or service manual anywhere on the internet and i even tried emailing the company but they never responded probably because i wasn't a company or something. Does anybody know anywhere i could find manuals? It seems like a very obscure piece of equipment sold to broadcast stations for stabilizing analog videos and it probably wasn't sold to the public
Which 3M static shielded bag - Page 1
Forum section: electronics / general

author: Shock
author_rank: Super Contributor
timestamp: April 23, 2024, 10:54:11 am
content: Looking for static shielded bags for 3.5" HDDs. I'd prefer 3M and resealable, has anyone got a part number that fits well? Experiences?

author: Shock
author_rank: Super Contributor
timestamp: April 30, 2024, 03:03:09 pm
content: bump

author: tooki
author_rank: Super Contributor
timestamp: April 30, 2024, 11:28:12 pm
content: If you want responses, provide some “meaty” question to respond to. The only thing you mention is “for 3.5” HDD, resealable, ideally 3M”. You don’t mention any other requirements, nor the reason you’re unable to select one yourself. What’s holding you up?

author: Shock
author_rank: Super Contributor
timestamp: May 01, 2024, 03:54:32 am
content: It doesn't need to exceed the specifications of the original disposable type bags, just something that will last well and not made of chinesium. 3M seems to make good products, the resealable looks a good idea but I'm unsure which one is a good fit. I don't want a lot of excess bag.I have no idea if there are purpose form bags or not. I'm looking for experiences.

author: Shock
author_rank: Super Contributor
timestamp: May 01, 2024, 12:08:20 pm
content: How tight is the fit? I'm torn over 5 x 8" (#30058) vs 6 x 10" (300610). If the drives are about 6" long and 1" deep that would leave about 1" for the ziplock space. So as long as they aren't super tight 5" wide, sounds ok. Are your bags 5" or 5.9" aka 6"?

author: Haenk
author_rank: Super Contributor
timestamp: May 02, 2024, 09:40:26 am
content: While there are "fitting" ESD bags, I had plenty of bags that were physically "too large" and have been bent over and taped to fit. So that really is no issue. If billion-Dollar-companies can do it, so can you.However "3M and sealable" will cost a quite a bit. I'd rather use plain bags and an impulse sealer - if you are going for larger quantities. If only running for low numbers, maybe ask around at your local computer stores - at least we almost always throw them away (and that was likely a good 5-digit number of them).Btw, by far the nicest bags came with IBM/Hitachi drives.

author: Shock
author_rank: Super Contributor
timestamp: May 02, 2024, 03:21:15 pm
content: I measured a few used bags and got 5.25" and 5.5". The HDD appear to be either right on or slightly over 10" in circumference. So unless the bags are slightly oversized, I'll have to settle on the 6x10" bag (which is a shame).
Aixun H314 1400W hot air station - has aixun jumped the shark? - Page 1
Forum section: electronics / general

author: thm_w
author_rank: Super Contributor
timestamp: April 30, 2024, 10:57:31 pm
content: H310D 1000W $190:https://www.aixuntech.com/product/h310d-1000w-smart-hot-air-gun-heating-rework-station-for-bga-repair-/H312 1400W $200:https://www.aixuntech.com/product/h312-smart-hot-air-gun-1400w-high-power-intelligent-rework-station/H314 1400W $250:https://www.aixuntech.com/product/h314-smart-hot-air-gun-heating-1400w-intelligent-rework-station-bga-repair/Steve reviewed the H310D previously and was not too impressed:Was OK but lots of UI issues, slowness, bugs.Would be nice if they could focus on the core functionality instead of adding stuff like fingerprint sensors and bluetooth remotes. Though maybe someone, somewhere, has a use case for that..

author: shabaz
author_rank: Frequent Contributor
timestamp: May 01, 2024, 12:03:16 am
content: Interesting instruments! The review video was interesting too.I wonder if the software capabilities with the profiles and chart, etc., could almost be repurposed into a DIY reflow oven controller instead!Although slightly more expensive (but still very low-cost), I've been thoroughly impressed with the Quick TR1300A (which I recall was also once reviewed by Steve). I got mine from AliExpress, which was a bit of a gamble since I'd never spent that much on the site and had not seen a review at the time. Fortunately, it worked out. But that product doesn't have the software potential that the Aixun devices will likely have if they sort out the bugs, etc.
How does the JBC (and clones) Soldering Station Sleep Mode Work? - Page 1
Forum section: electronics / general

author: Astray
author_rank: Contributor
timestamp: April 27, 2024, 05:42:45 pm
content: Hello,I'm trying to get a better understanding of the JBC and Aixun T3A/T420 cartridge type soldering stations connections and how they work to put the soldering iron into the sleep mode while it's connected to its stand.I remember reading a post (or maybe watched a video) about it but I've been unable to find it again even after searching the forum and googling. There was a breakdown of all the connections to the handle from the stand and the main station.What is electrically happening when the outer metal part of the handle connects to the stand? What kind of voltage, current, and/or signal is it sending back to the main station?I would like to know this information to make it easier to modify my soldering station and out of curiosity's sake too.Thanks!

author: Astray
author_rank: Contributor
timestamp: April 27, 2024, 07:37:40 pm
content: Someone posted this very useful information about the Aixun T420D in a postherethat explains it very well.""Standby" pin #4 and "extractor" pin #3 are internally pulled up (to 3.3V) different pins of microcontroller. When you insert a handle to cradle (connected to pin #4) or tip of cartridge to extractor (connected to pin #3) you push these pins to gnd, and can see a state "standby" or "extract" on station's display. T245 handle have a GND on metal ring, T115A have a GND both on metal tip and on metal shank near rubber cable gland."
Teardown: DigitNOW "U601" 4K HDMI capture box - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 24, 2024, 05:05:48 am
content: I managed to score a DigitNOW 4K HDMI capture box for just under $30. Reviews show why it was discounted so much, with problems ranging from poor reliability in the long term to the RGB LEDs causing interference to the microphone input. I figure that I could mod it to be reliable and end up with a really cheap way to do 4K HDMI captures.The HDMI input first goes to a mystery "HD202" splitter chip, from there one output goes to the HDMI pass through output and another goes into an IT68051 HDMI decoder. Then there's a rather wide parallel bus sending the data to an IT9325 USB 3.0 video controller. A WM8960 handles the analog audio input and output.On the reverse side, there's a KH25L6436F holding the firmware for the USB controller and a FCM32F030C8T6 microcontroller.By far, the biggest flaw is that the main chips are cooled by means of silicone blocks bridging the gap to the top cover, quite too thick for good cooling. The USB-C power input is also lacking the 5.1k resistors to allow it to work on a PD port. Both seem like easy fixes, the LEDs turn out to be WS2812 or similar so my initial idea of filtering the PWM to fix the interference isn't going to work, maybe improving the bypassing as close to the LEDs as possible would fix it.

author: Phil1977
author_rank: Frequent Contributor
timestamp: April 24, 2024, 02:23:05 pm
content: Do you know if it´s able to digitize 4k with at least 30fps?I ask because I once got a similar product just to find out - late after possible returning - that it only loops through the 4k60fps signals it was prominently marketed with.The USB capture path was limited to 1080p - after all with 60fps.

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 25, 2024, 03:30:07 am
content: Yes, it can do 4K 30FPS capture over USB. But the 3 main chips get quite hot in the process, therefore I'm modding it to improve the cooling.
Faxitron DX-50 / MX-20 FOSS toolkit - Page 1
Forum section: electronics / general

author: JohnDMcMaster
author_rank: Newbie
timestamp: January 06, 2020, 06:44:05 am
content: https://github.com/NucWiki/faxitronHi all! I've written software to fire the x-ray and snap pictures. Its tested on Ubuntu but may work on other systems. I've tested with both DC5 and DC12 as well as several x-ray hardware versions. The USB protocol is a little finicky...I've tried to iron out issues, but please let me know if there are still some lingering. Hope you enjoy!Special thanks to:-Andrew Seltzman: info + DC5/DC12 testing. Need to verify his issues are fixed-Alexander Hude: DC5 testingPS: I've also started to collect some Faxitron info on to a wiki page. Please let me know if you'd like to contribute to either the page or the software! Link:https://nucwiki.org/wiki/index.php/Faxitron

author: rickells
author_rank: Regular Contributor
timestamp: April 24, 2024, 04:48:42 pm
content: New thread on newer BiOptics Bio Vision BioVision Faxitron units ca. ~ 2009 - 2015See:https://www.eevblog.com/forum/reviews/faxitron-biovisionbioptics-win7-(pci-resource-issue)/new/#new
Weller Piston O-Ring - Page 1
Forum section: electronics / general

author: 2X
author_rank: Frequent Contributor
timestamp: April 23, 2024, 09:37:53 pm
content: Hello,I have the Weller SA21A desoldering pump and I his vacuum isn't so power anymore. I bought a new one but I would like to repair and my old one. I measured the O-ring from the piston and the dimensions are below. Do you know if these O-rings are made from some certain material or they are just a regular O-ring? I didn't find any official replacement form Weller. The only spare that I found is the desoldering tip (Part Number: SA21A1).Inner Diameter: 13,5mmOutside Diameter: 18,1mmThickness: 2,5mm

author: PeterG
author_rank: Frequent Contributor
timestamp: April 23, 2024, 10:39:46 pm
content: That size appears to be a standard size o-ring.You can source them from places such as this.https://www.oringsandmore.com/metric-buna-o-rings-13-5-x-2-5mm-minimum-25-pcs/
Ultrasonic cleaner sweep mode vs dual frequency  - Page 1
Forum section: electronics / general

author: HobGoblyn
author_rank: Unknown
timestamp: April 23, 2024, 11:40:26 am
content: Hi all, looking for a cheapish ultrasonic cleaner.I’ve read that I should get one with sweep mode.A fair few that I’ve looked at don’t mention ‘Sweep’, but do say they are ‘Dual Frequency’.Are these the same thing please?For examplehttps://www.amazon.co.uk/POLLOR-Pro-Series-Ultrasonics/dp/B0CBLDKBDG?th=1Thanks

author: HobGoblyn
author_rank: Unknown
timestamp: April 23, 2024, 12:20:08 pm
content: I think they are different and on the dual frequency one I can select either frequency but not sweep between the two.
Metcal MX5200 startup - Page 1
Forum section: electronics / general

author: jeryray
author_rank: Newbie
timestamp: April 21, 2024, 07:02:09 pm
content: Anyone know why the MX5200 FW 1.37 does not always remember you last used 2 ports?I have 5 of these 2x 1.37 others 1.33 that sometimes power up with only port 1 active?TIA
Ideal hand tool for cutting traces on prototyping strip board? - Page 1
Forum section: electronics / general

author: badrequest400
author_rank: Contributor
timestamp: April 20, 2024, 05:09:48 pm
content: For someone who has a stock of copper strip board and is therefore kind of committed to that method of building circuits, what is the ideal tool for breaking the strips that connect the through holes? I know you can use a 2 mm drill bit but is that the most ideal tool? A good tool would be self-centering in the hole like a drill bit is and only take a couple of turns to reliably cut the trace.

author: themadhippy
author_rank: Super Contributor
timestamp: April 20, 2024, 05:25:25 pm
content: the tool designed for the job, a vero spot face cutterhttps://verotl.com/verowire-accessory-spot-face-cutter-part-number-22-0239

author: tggzzz
author_rank: Super Contributor
timestamp: April 20, 2024, 05:32:20 pm
content: A dremel with a dental bur.That can also be used to cut islands/tracks on copperclad PCB, for use with manhattan and rat's nest construction techniques.

author: Gyro
author_rank: Super Contributor
timestamp: April 20, 2024, 05:54:47 pm
content: 2mm sounds a bit small. I can't find my vero spot face cutter at the moment, but I think it's more like 3mm [Edit: I suppose it can't be quite that big!], allowing more copper removal in a smaller number of turns. I remember seeing magazine adverts for the original cutter, when veroboard came out, it looked to have a center pin but I never saw one in the flesh. The modern ones are just a spade drill shape, A standard drill in a piece of wooden dowel would be just as good.

author: asis
author_rank: Frequent Contributor
timestamp: April 21, 2024, 07:05:58 am
content: ... I accidentally found it in a hairdressing supplies store and adapted it to suit my needs...

author: tooki
author_rank: Super Contributor
timestamp: April 21, 2024, 07:21:47 pm
content: Quote from: Gyro on April 20, 2024, 05:54:47 pmMine, a Farnell-branded knockoff, is 3.5mm, in fact.

author: Gyro
author_rank: Super Contributor
timestamp: April 22, 2024, 09:08:31 am
content: Thanks tooki, yes I just found mine - 3.5mm.

author: jpanhalt
author_rank: Super Contributor
timestamp: April 22, 2024, 09:21:45 am
content: I use a small burr in a Dremel as mentioned. I can get a small, straight cut between holes. I also keep a drill bit in an inexpensive pin vise hand when the cut is centered on a hole.Drills come in different included angles. The wider the angle, the shallower the hole needs to be to cut a trace. 118° included angle is most common. 135° is readily available, still centers well, and is what I use.

author: tggzzz
author_rank: Super Contributor
timestamp: April 22, 2024, 09:51:45 am
content: Quote from: jpanhalt on April 22, 2024, 09:21:45 amI should have mentioned that. The capability can be useful, either to fit components closer together, or to allow an "extra" component to be added furing testing.
Soldering station recommendation - Page 1
Forum section: electronics / general

author: bottlegardener
author_rank: Contributor
timestamp: April 19, 2024, 09:08:21 pm
content: Hi all,I'd like a second soldering station as I'm getting tired of moving my beat-up Weller WES51 between two locations. I have a vague notion that much has changed technology-wise in the intervening 18-odd years since I bought the Weller. I'm a bit overwhelmed. I was just wondering if anyone has any recommendations for an inexpensive (under $200, cheaper is better) station?I work on mostly old audio equipment and old cameras. Everything is through-hole. It nearly all uses lead solder. I sometimes have to work on flexible PBCs and primitive PCBs with traces that easily lift. On the other end, I sometimes need to solder wires to stainless steel battery contacts (for which I typically use Rubyfluid and thoroughly clean afterwards) or braided chassis ground wires on guitar amps. Other than that it's all pretty basic stuff (patchbays, cables, ordinary through-hole PCBs).Any recommendations would be much appreciated. I'm particularly curious if any of the cheap Aliexpress would suffice.

author: thm_w
author_rank: Super Contributor
timestamp: April 19, 2024, 09:19:58 pm
content: For your budget you are probably looking at a t245 clone station.T12 clone would be cheaper still, but you'd give up a bit of performance.https://www.youtube.com/@sdgelectronics/search?query=solderinghttps://www.eevblog.com/forum/other-blog-specific/the-sdg-electronics-soldering-station-comparisonshootout-thread/
50 Ohm RF Terminators - Page 1
Forum section: electronics / general

author: WT4DX
author_rank: Newbie
timestamp: April 10, 2024, 03:08:19 am
content: Is there one company that makes a consistently more accurate 50 ohm RF terminator over another?

author: shabaz
author_rank: Frequent Contributor
timestamp: April 10, 2024, 03:42:01 am
content: Most no-name BNC ones are best avoided, since they are likely intended for old LAN setups, and are not very wideband.The 50 ohm terminators/loads with a datasheet will be best, because you can examine that to see if it meets your needs (they will have a chart or table of return loss values). Examples are Minicircuits (generally affordable) or Huber+Suhner (might be a bit more expensive). Other examples off the top of my head that may offer them are MACOM, Radiall, Rosenberger, I've not purchased 50 ohm terminators/loads from them though. I'm sure there are even more exotic suppliers.I've bought 50-ohm loads from Minicircuits if it's cost-sensitive (but it is still backed up by a datasheet), otherwise Huber+Suhner. Both are available from normal electronics distributors usually (or can buy direct from Minicircuits).

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: April 10, 2024, 11:28:25 pm
content: Shabaz is correct, in my experience,. BNC are usually not good for higher freq.I have a bunch of BNC 50 ohm loads Brand Name, Amphenol. as I remember, good to maybe 50 MHzAlso a bunch of Huber Suhner SMA loads good to over 3 GHz, This is as far as I can test.I have lots of both, new in packages, if you want some.

author: jonpaul
author_rank: Super Contributor
timestamp: April 12, 2024, 11:10:28 am
content: The best are old Tektronix 50 Ohm BNC 0.5WMost accurate are vintage EG&G with 0.1% accuracty.We use Mini-Circuits excellent HAT-xx+ (xx = attn in db)DC-2 GHz, fine construction, just $10 and small orders easy.https://www.minicircuits.com/WebStore/terminations.htmlMade in amy power levels, BW and connectors, eg SMA, N, BNC.ENjoy,Jon

author: WT4DX
author_rank: Newbie
timestamp: April 12, 2024, 05:30:14 pm
content: What is an acceptable accuracy tolerance for a 50 ohm terminator?Thanks,Tem

author: WT4DX
author_rank: Newbie
timestamp: April 13, 2024, 04:43:09 pm
content: Does anyone own this N-Type Huber+Suhner terminator (65_N-50-0-1/133_NE)?If so, would you tell me the average return loss in the 1MHz -1GHz range?Thanks,Tem

author: jonpaul
author_rank: Super Contributor
timestamp: April 14, 2024, 12:57:12 am
content: Tem: Accuracy:Rtn loss is only slightly affected if term is off bu a few %DC accuracy to test eg Scope input Zo, should e at least 1%It possible to have a fine wideband RL but the DC R and accuracy is not perfect.Our old EG&G have 3 digit cal eg 51.1 Ohm.The TEK can be off 2 %JonJon
New EEVBlog Soft Case - weird straps? - Page 1
Forum section: electronics / general

author: ploxiln
author_rank: Contributor
timestamp: April 13, 2024, 02:03:01 am
content: The EEVBlog soft multimeter case/pouch just showed up on Amazon recently, and I bought it from there because I was buying some other stuff on Amazon anyway.I did some searching just now, and couldn't find many reviews or internal photos of this case. Are these internal straps normal? How are they typically used? The hanging strap, on the inside? Velcro loops strap on left edge, and then hooks strap and loops strap in the middle?I have a couple other multimeter soft cases and hard cases, they all have an internal strap from the left edge to the right edge (either in 2 velcro halves, or one elastic strap). This was a pretty minor expense, to support the channel, so I'm not outraged or anything. The case is actually decent otherwise, good padding, exterior, inner pocket. I'm inclined to just carefully cut off the internal straps. But I'm curious ... is this intentional?

author: Ian.M
author_rank: Super Contributor
timestamp: April 13, 2024, 04:03:26 am
content: The hanging strap is obviously positioned to pop out through the end of the zipper. Put it out if/when you want to use it or put it back in to avoid it snagging on stuff.The velcro straps appear to be reasonably positioned for holding hanked probe leads. Try using them for a while before deciding to shorten or remove them.

author: ploxiln
author_rank: Contributor
timestamp: April 13, 2024, 05:35:13 pm
content: Yeah ... I'll start by just cutting off one of the 3 velcro strips, one in the middle on the right. The one in the middle on the left is hooks, and makes some sense with the loops velcro strap on the left edge.The two in the middle, they stick together if nothing is between them, and are pretty stiff and annoying there. You could put something between them, but when they come back together on the other side, they stick straight out again rather than wrapping around nicely, because they're already facing each other. And you can't use the loops strap on the right-middle with the loops strap on the left edge of course. I'm still not convinced that this arrangement makes sense: there's something extra, or something missing.

author: Monkeh
author_rank: Super Contributor
timestamp: April 13, 2024, 07:23:02 pm
content: Don't cut them off, just learn how to use them:Looks to be the same arrangement, anyway.The other handle is inside so you can tuck it away if you don't want it. If you do you just feed it out the zip.

author: ploxiln
author_rank: Contributor
timestamp: April 14, 2024, 12:36:12 am
content: OK, yeah, that is consistent with this eevblog case, and makes sense. The velcro straps in the eevblog case are just stiffer / less fabric-strap-y. Thanks
Seeking advice on new handle for old station (thermocouple sensor type) - Page 1
Forum section: electronics / general

author: Nick@D
author_rank: Newbie
timestamp: April 08, 2024, 02:23:02 am
content: [ Specified attachment is not available ]I have an old station (Micron - see pics) that needs a new handle due to lack of tip availability (and the old tip sleeve assembly has corroded, and buckled as I attempted to knock the old tip out). The station belonged to my grandfather, and did its time on a factory line. It's an old station, and I know some would just chuck it, but being something of a sentimental piece, I'd love to get it back in action.The heater element measures 12 ohms (heater) and 1 ohm (thermocouple sensor). Supply from station is 24V AC, and the old handle states 48 watts.I'd love some suggestions on what would be a good compatible replacement handle. I've seen irons such as the Yihua 907A, which I believe would work (and fits 900m-type tips) , but looks of dubious quality. Other irons such as the Solomon look workable, but tip availability concerns me (SR-622??)What would be a good bang for buck iron, with good tip availability that would fit my station? (P.s. I will be hard wiring any modern 5 pin plug type iron into the station). Can I get something decent for 50 bucks or less?Many thanksNick
Proper ESD EBP setup for a workbench? - Page 1
Forum section: electronics / general

author: Faranight
author_rank: Unknown
timestamp: April 03, 2024, 06:04:23 pm
content: Hello. I'm in the process of upgrading myelectronics workbenchto something more decently-built and equipped. I'm currently in the process of routing the power cables and strips, but I've also wanted to add a few points where an anti-static equipment like an ESD wristband can be attached. I'm curious to know what's the proper way that these things are wired and connected.I've already bought a few items online, but they seem to be somewhat non-consistent. For example, I've bought three different ESD EBP's (earth-binding points) - these are mountable grounded sockets (studs) where anti-ESD wires can attach. Already I noticed a difference in the three.Twoseemto have parallel 1 MOhm resistors between the metal sockets and the earthing wire while thethird onedoes not - the multimeter shows a short on all sockets, and the studs aren't connected to anything. Then there are wires. SomeESD spiral cablesseem to have a built-in 1Mohm resistor themselves but I've also seen some anti-static cables that do not - I think my Ersa iCON soldering station had one like this. Finally, there'sthe wristbandthat shows resistance in about 10 to 100 Ohms andthe antistatic matthat shows resistance in the MOhm range from the metal ESD pin to a random point on the bottom black layer. The top layer doesn't measure anything.Now my question is: What's the correct way these things should be structured and wired? The ESD EBP's (ground cable) should obviously be grounded directly, but where should the 1 MOhm resistors be located ideally?- Should EBP sockets have built-in 1MOhm resistors? Always or only in some cases? Which ones?- Should ESD cables have built-in 1Mohm resistors? Always or only in some cases? Which ones?Thanks in advance.

author: thm_w
author_rank: Super Contributor
timestamp: April 03, 2024, 09:29:11 pm
content: https://www.descoindustries.com/pdf/TB-7504.pdf

author: Faranight
author_rank: Unknown
timestamp: April 04, 2024, 07:54:57 am
content: Thank you. While that document did not answer my questions, it was very informative and did point me in the right direction.After some googling I found out that the relevant document for this matter is theEN 61340-5publication.The resistance between the common grounding point (PE) and the mat/workplace/wristband should be in the range of 10kOhm to 1GOhm, and the devices should not be daisy-chained.Using two separate megaohm resistors in series (socket + spiral cord) isn't a problem.EDIT: Also,https://docs.rs-online.com/4668/0900766b81718ae2.pdf

author: tooki
author_rank: Super Contributor
timestamp: April 06, 2024, 12:48:03 pm
content: This recent mega-thread contains tons of resources:https://www.eevblog.com/forum/beginners/build-a-safe-and-cheap-esd-workstation/Not that I recommend obsessing over it to anywhere near the degree of the OP in that thread.
Is anyone else OCD with their tool and equipment organization? - Page 1
Forum section: electronics / general

author: Hullen
author_rank: Contributor
timestamp: April 03, 2024, 12:17:16 am
content: Ok so I’m sure that pretty much everyone here gets some enjoyment out of tools, electronics related and likely otherwise. I’m wondering about organization of those tools and equipment and how particular you guys are about that. So I have a dedicated electronics workbench in my garage where my scope as well as soldering station, parts organizers as well as other electronic bits. I keep it very neat and organized.At work my ocd is actually a bit (maybe a lot) worse. I have two Snap On Epiq tool boxes(84” and 68”) and a Snap on Roll cart. The reason for so much tool box is I refuse to have tools piled on top of each other in my drawers. I can’t stand having to look for a specific tool. Sockets are on socket rails, wrenches are all on racks and pliers are all on racks. Obviously there’s certain things that there’s nothing you can do about such as the tools with cases that end up the bottom drawer. But I even have the the RIGID Pro gear system that I keep sorted fasteners in, consumables like glues greases and tapes, as well as wire harness connectors that I’ve salvaged from doing wire harness replacements… again all organized.How do you guys organize your tools and are you picky about being organized?

author: joeqsmith
author_rank: Super Contributor
timestamp: April 03, 2024, 12:48:50 am
content: Sure do. Here is mine.

author: Hullen
author_rank: Contributor
timestamp: April 03, 2024, 12:54:10 am
content: Lol

author: coppercone2
author_rank: Super Contributor
timestamp: April 03, 2024, 07:44:45 am
content: i try not to put oil soaked things on wood or at least isolate it with piles of pliers

author: Hullen
author_rank: Contributor
timestamp: April 03, 2024, 10:45:28 am
content: Does anyone have an actual response to the topic that was posted?
I2C/SPI Host Adapters!  Aardvark  and the Binho Nova - Page 1
Forum section: electronics / general

author: FranciscogGomez
author_rank: Contributor
timestamp: March 11, 2022, 04:21:05 pm
content: Hello everyone!So I was about to buy the Aardvark I2C/SPI Host Adapter; however before heading to the shop. I made a little and quick research and I found the following tool: Binho Nova: Multi-Protocol USB Host Adapter.I'm impressed with Binho Nova specifications (higher interface frequencies for SPI and I2C than Aardvark, plus UART, 1-wirea nd ATMEL SWI interfaces support).I would like to know if anyone of you had the opportunity to work with these two tools and could share his/her opinion?BTW, the Binho nova is ~30% cheaper that the Aardvark in my region.I'll list the key features for both tools:Aardvark I2C/SPI Host Adapter● I2C master and slave up to 800 kHz†● I2C multi-master support● SPI master up to 8 MHz● SPI slave up to 4 MHz● GPIO with selectable pinsThe Aardvark I2C/SPI Host Adapter is compatible with:● Display Data Channel (DDC)● System Management Bus (SMBus)● Power Management Bus (PMBus)● Smart Battery Bus (SBBus)● ntelligent Platform Management Interface (IPMI)● Two-Wire Interface (TWI)Binho Nova Multi-Protocol USB Host Adapter● Support for SPI @ 12MHz max clock● Support for I2C @ 3.4MHz max clock● Support for UART @ 1000000 max baud● Support for Dallas 1-Wire● Support for Atmel Single-Wire Interface● Provides 3v3 and VUSB power rails● 1 x DAC Output, 5 x ADC Inputs● GPIO / Interrupt / PWM Support● Programmable RGB Status LED● Field-Upgradeable Device Firmware● Cross-platform Support for Windows,Mac, Linux● Robust, low-profile AluminumEnclosure● USB Type-C ConnectorCheers!Francisco

author: daro19862
author_rank: Newbie
timestamp: April 02, 2024, 05:07:22 pm
content: What did you choose?I found a clone Aardvark:https://pl.aliexpress.com/item/1005006313346185.html?src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&albagn=888888&isSmbAutoCall=false&needSmbHouyi=false&albcp=19735245762&albag=&trgt=&crea=pl1005006313346185&netw=x&device=c&albpg=&albpd=pl1005006313346185&gad_source=1&gclid=Cj0KCQjw2a6wBhCVARIsABPeH1s1urQiYOepQ7gPKGgnR7IEDw4hfZk2oKNVqeJ9HwnIMjMrOW7dAwcaAtqcEALw_wcB&gclsrc=aw.ds&aff_fcid=fd068beba7da4eac9d58c6007e56a431-1712077038537-04776-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=fd068beba7da4eac9d58c6007e56a431-1712077038537-04776-UneMJZVf&terminal_id=4b777aaace524d63b0f411d0384061b0&afSmartRedirect=yI think it works just like the original,maybe someone used ?

author: thm_w
author_rank: Super Contributor
timestamp: April 02, 2024, 09:48:53 pm
content: Quote from: daro19862 on April 02, 2024, 05:07:22 pmIf you are looking for cheap did you consider the bus pirate as well?https://buspirate.com/Thread here:https://www.eevblog.com/forum/reviews/i2cspi-interface-tool-bus-pirate-or-something-else/
Warning: New Weller WXSmart solder station - Page 1
Forum section: electronics / general

author: McCarthy
author_rank: Contributor
timestamp: March 30, 2024, 04:12:35 pm
content: So I bought this all new Weller WXSmart solder station with 2 handles, 2 tweezers and a bunch of tips / inserts worth around $2,600 a few months ago on Tequipment.The order was not shipped from Tequipment, but drop-shipped from Apex Tool USA directly.Below a few photos, showing how that expensive station arrived at my doorstep, without ANY shipping box, let alone packing material. Apex slapped the shipping label on the retail box and sent it off, didn't even bother to tape the lid shut. The station would have fallen out of the retail box if I wouldn't have supported it with my hand underneath.My impression is, that this was a demo unit or customer return, considering how dirty the retail box was, fingerprints on the display and all.I plugged the station in, used the touch screen menu for a couple minutes, and was greeted with lagging and sluggish inputs. That was enough for me.Needless to say, I returned everything. I will not accept a delivery like that. And then it took over 2 weeks to get my money back, countless emails, calls, and chats.My money went into a JBC DDE station with accessories, been working great for 3 month now.I will let a few pictures do the talking. Be warned.
Hatch sound maker.. Any guesses to what the unpopulated pad is? - Page 1
Forum section: electronics / general

author: frmdstryr
author_rank: Contributor
timestamp: March 29, 2024, 03:57:58 pm
content: My wife bought a Hatch sound maker. Not a fan of IOT junk in general so I put it on it's own wifi network with separate vlan and throttled it to 2g speeds... but the network bandwidth shows it's continually transfering something.I was looking at the FCC photos and noticed a strange unpopulated pad P1 with holes around it (see attached photo orhttps://fccid.io/2AFYZ-HBREST2/Internal-Photos/Internal-Photos-5375161).Any guesses as to what it is for?

author: Zoli
author_rank: Frequent Contributor
timestamp: March 29, 2024, 05:09:13 pm
content: 6-pin tag-connect programming connector; as an example:https://www.tag-connect.com/product/tc2030-alt-legged-cable-for-use-with-altera-byteblaster

author: frmdstryr
author_rank: Contributor
timestamp: March 29, 2024, 05:18:22 pm
content: Yeah that looks like it. Thanks!Edit: Those are neat connectors, might start using them for my own stuff.
Microscope servicing in UK? - Page 1
Forum section: electronics / general

author: AndyC_772
author_rank: Super Contributor
timestamp: March 27, 2024, 04:57:59 pm
content: HiI have an Olympus microscope (SZ40) which is in need of a general clean and service. It's quite old, but still in regular daily use and it's an excellent piece of kit.Does anyone have experience with any companies (in UK) that might be able to carry out a service please?

author: nfmax
author_rank: Super Contributor
timestamp: March 27, 2024, 09:27:38 pm
content: I bought a replacement stage plate for my SZ40 from JB Microscopes, jbmicroscopes.co.uk - they also do servicing. I’ve not used them for that myself though

author: watchmaker
author_rank: Unknown
timestamp: March 29, 2024, 08:52:36 am
content: Quote from: AndyC_772 on March 27, 2024, 04:57:59 pmI have cleaned the lenses and zoom racks of at least a dozen AO/BL/Nikon/Olympus. They are all easy to do. IPA for lenses, cotton swabs, sensor sponges , Contact cleaner for the old lube on zoom and MolyKote for the lube. All are pretty simple. No need to take the prism housing apart as it is very well sealed, Even the zoom optics do not require much cleaning because they should be in a gasketed housing (although flux fumes do get in). The main issue is the zoom.Here is a link to a thread on a UK based Microscope forum. It is relevant to you, BUT, the forum is very helpful and can direct you to a good service provider.https://www.microbehunter.com/microscopy-forum/viewtopic.php?t=3651

author: coppercone2
author_rank: Super Contributor
timestamp: March 29, 2024, 10:11:54 am
content: IDK that shit goes south really easilyespecially the god damn prisms.
Universal voltage soldering iron? - Page 1
Forum section: electronics / general

author: aeberbach
author_rank: Regular Contributor
timestamp: March 24, 2024, 10:41:53 pm
content: I have searched and not found an answer here or by browsing manufacturers. I suspect the answer is no.I live in Australia now, 240V AC mains, but work may take me to 100V or 115V places for a few years. If I want to upgrade my soldering station (discontinued Hakko 942, tips out of production) will I need to buy new soldering equipment there and I have it for just those few years? Is there a system I could buy into now that I can take with me? Or do any of the manufacturers offer reasonably priced parts to convert their stations?I'm looking at under $1000.

author: wraper
author_rank: Unknown
timestamp: March 24, 2024, 10:50:09 pm
content: You can get some station that has SMPS. For example some Chinese station that uses Hakko T12 or JBC cartridges. Or you can get some portable iron that runs from PSU or power bank. Like Miniware TS101https://www.welectron.com/Miniware-Soldering-Iron-TS101-I

author: themadhippy
author_rank: Super Contributor
timestamp: March 24, 2024, 11:02:12 pm
content: buy wot takes your fancy for your home country use and if buy a 110-240 step up transformer for foreign parts

author: thm_w
author_rank: Super Contributor
timestamp: March 25, 2024, 10:18:44 pm
content: Metcal GT90/GT120 use an off the shelf DC supply so will work 100-240V.But agree with wrapper, tons of cheap stations will run off 12V or 24Vdc so you can pair them with a universal power bank/brick. Thats going to be a more compact solution. You can also run a lot of them off of 18V lithium tool batteries for portability.
Hot Air Rework Station Recommendations.   - Page 1
Forum section: electronics / general

author: Hootis Tigglebits
author_rank: Contributor
timestamp: March 01, 2024, 09:01:07 pm
content: My employer has allotted me up to $1600 for a new hot air station. The current one we have has a vacuum, foot pedal, and nozzles for different types of IC’s and gets used almost daily We mainly use it to remove surface mount components down to 0603. I need a replacement that is good quality and has similar features. Can anyone provide me with recommendations?

author: thm_w
author_rank: Super Contributor
timestamp: March 01, 2024, 11:41:39 pm
content: Either buy the same unit, or get one of the various hot air stations that has been recommended here multiple times (use search feature) and a separate vacuum tool:https://www.eevblog.com/forum/reviews/looking-for-hot-air-station/https://www.tequipment.net/soldering-equipment/desoldering-equipment-rework-stations/

author: KG7AMV
author_rank: Frequent Contributor
timestamp: March 13, 2024, 09:31:48 am
content: None of the whizzbang features but This one works great.Atten ST-862DUS Wholesaler link.https://www.wholesalegadgetparts.com/atten-st-862d-hot-air-rework-station.html

author: tooki
author_rank: Super Contributor
timestamp: March 17, 2024, 12:14:26 pm
content: Quote from: Hootis Tigglebits on March 01, 2024, 09:01:07 pmWhat do you have now, and why are you replacing it?

author: jbf
author_rank: Contributor
timestamp: March 19, 2024, 07:56:10 am
content: Never heard of the Wholesale Gadget Parts site before, but if thats legit its a great price. I ordered mine over the summer for $170 which was the cheapest at that time.I bought mine at Newark. Its exactly the same but has Newark's "Multicomp Pro" brand name on it instead. They whitelabeled it basically.https://www.newark.com/multicomp-pro/mp740784-us/hot-air-station-1kw-110vac-us/dp/27AK4391?CMP=e-email-sys-invoice-NA-ProductIf the wholesale gadget site is legit that's a really amazing price.

author: KG7AMV
author_rank: Frequent Contributor
timestamp: March 25, 2024, 02:45:44 pm
content: Quote from: jbf on March 19, 2024, 07:56:10 amVery Legit Store, Genuine Atten not the clones.I myself and a bunch of others I personally know have bought form them! This is the longest I have seen them out of stock.