hybridfree/eevblog-posts huggingface dataset:
AxxSolder3 and tip grounding question - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: February 24, 2025, 02:04:00 pm
content: The AxxSolder3 is an DIY soldering station for JBC cartridges and SDG Electronics just did a review of it:SDG #358 AxxSolder - Open Source JBC Soldering Systemhttps://youtu.be/gZwsewFl4gkand here is a presentation by the creator:AxxSolder 3 - Open source DIY soldering station for JBC cartridges, 9-24 VDC and USB-PD -- Axel Johnsonhttps://youtu.be/I5uLvEM9wpYMy question is... At the 1 minute mark Axel says that in order for tip grounding to work the power supply must be floating. What is the rationale for this and does only apply to switchmode supplies?

author: thm_w
author_rank: Super Contributor
timestamp: February 24, 2025, 10:15:10 pm
content: Presumably the same JBC grounding issues that have been discussed in other threads.You have the tip grounded to earth, which is directly connected to the thermocouple.So now if you take your grounded power supply, your circuit is referenced to earth there as well, but now there is a ground loop. Thermocouple voltage is low, we are working in the range of 5-25mV, so easily influenced by noise in the circuit.It is probably possible to do but would take some effort and filtering.Schematic is here, your usual high gain opamp TC input:https://github.com/AxxAxx/AxxSolder/blob/main/photos/AxxSolder_Schematic.pngTransformer based supplies I would expect it also to apply to? But grounded output transformer based supplies are not common.
Digital capacitor tester - Page 1
Forum section: electronics / general

author: Veketti
author_rank: Regular Contributor
timestamp: February 15, 2025, 09:30:07 pm
content: I bought from AE capacitor discharger (model YMC-02) even though you can use just power resistor for the purpose. There are not many designs of these available and haven’t found any reviews of these so I decided to post a picture of it here. Measured with 30VDC and it draw ~4.8mA which is 6250ohm. One of the resistor blocks is 7500ohm and all four add up to 30kohm. Maybe that D4802 high voltage transistor PWM the load.

author: thm_w
author_rank: Super Contributor
timestamp: February 18, 2025, 10:21:36 pm
content: D4802 NPN 1100V 1.5A.Maybe it turns on when the voltage has dropped to a certain level to speed up discharge? Sort of looks like its in parallel with the resistors but hard to tell.The resistance is 30k so 800V = 27mA, at 100V = 3mA.
Universal C210/C245/C115 base - what's the difference? - Page 1
Forum section: electronics / general

author: ledtester
author_rank: Super Contributor
timestamp: February 11, 2025, 12:11:13 am
content: In this AliExpress listing:Universal C210 C245 C115 Soldering Iron Holder Metal Intelligent Welding Sleep Base for JBC Sugon Aifen Aixun Handle Holderhttps://a.aliexpress.com/_mrlj7Ldthere doesn't seem to be any difference between the C210, C245 and C115 versions except that the C115 is pictured with a cord riser.Is there any difference? If I bought the C115 version could I use it with a C245 handle and tips?Attached are the pics from the listing.

author: thm_w
author_rank: Super Contributor
timestamp: February 11, 2025, 01:36:40 am
content: Read the reviews. Its probably a good fit for 245 but not quite as good for 210 115, they probably sit with the foam surround.Quote

author: ledtester
author_rank: Super Contributor
timestamp: February 11, 2025, 08:05:36 am
content: I guess the riser thing is actually another handle holder...

author: thm_w
author_rank: Super Contributor
timestamp: February 11, 2025, 10:21:07 pm
content: Yes, I haven't tried that style, you can find a video here:https://www.jbctools.com/nano-c115-nano-station-updater-kit-product-2200.html

author: Original
author_rank: Contributor
timestamp: February 11, 2025, 10:40:20 pm
content: Get the 115 version - works great!The central seat works well with fake C210 and C245 handlesI did a conical honing on the C115 extension petal because my fake C115 handle would not seat perfectly.Also it was more convenient to inverse the petal top angle as in the photo. (attention the metal pedal is made of the softest aluminum known to mankind)Original JBC C210 and C245 will stick in the central seat due to metal ring having slightly bigger circumference. No worry, sanding the seat makes it perfectP.S. Pic featuring diy extension auto switch for using C115 and C210 handle. VERY convenient.

author: Original
author_rank: Contributor
timestamp: February 11, 2025, 10:48:31 pm
content: Quote from: thm_w on February 11, 2025, 01:36:40 amNot quite. The seat has two distinct steps.C245 seats its metal ring on the top bigger cut.C210 sits in the inner smaller cut.Both are supported on each metal ring. Just like in the original station seat.Also sleep function works.Sometimes you need to trim the green plastic ring on the handle of the 210 to seat perfectly.

author: thm_w
author_rank: Super Contributor
timestamp: February 12, 2025, 12:00:22 am
content: If you have to trim the handle then the fit is not very good..

author: Original
author_rank: Contributor
timestamp: February 12, 2025, 12:06:05 am
content: Quality and accuracy is China at its besttrue but consider their cost...10 euro handle and 15 euro base...
Metcal BVX Hose extension - Page 1
Forum section: electronics / general

author: eurekaiv
author_rank: Contributor
timestamp: February 02, 2025, 09:28:21 pm
content: I have a Metcal BVX 101 fume extractor and I would like to move the main unit to live underneath my bench and run the hose to the top of the bench. I'm having trouble finding the correct hose in the correct size. Does anyone have any idea where I can buy the adjustable (holds position) and flexible hose material? It's a 2" outside diameter and I've had no luck finding anything suitable and currently available through my searches.

author: thm_w
author_rank: Super Contributor
timestamp: February 04, 2025, 10:09:15 pm
content: https://store.metcal.com/en-us/shop/fume-extraction/hose-kits/BVX-ARM-K1Isn't it here? BVX-CH01 6' Hose
Weller WX compatible DIY soldering station project - Page 1
Forum section: electronics / general

author: alibenpeng
author_rank: Newbie
timestamp: January 29, 2025, 12:50:23 pm
content: Hi, everyone!I just released my latest DIY project, a Weller WX compatible two channel soldering station.More details and design files are over at github:https://github.com/alibenpeng/WNKmaster

author: PlainName
author_rank: Super Contributor
timestamp: January 29, 2025, 02:20:17 pm
content: Nice. Thanks for sharing

author: Hydron
author_rank: Super Contributor
timestamp: January 30, 2025, 10:43:31 pm
content: Ooh, great to see my CAD work on the connector (mikrocontroller thread) was of use! Out of interest, what did you end up changing?My station project didn't get much further than the connector and a very hacky controller on a breadboard, so I might end up building one of these

author: alibenpeng
author_rank: Newbie
timestamp: February 04, 2025, 01:26:30 pm
content: First of all, let me give you a big thanks!Without your 3D model I probably wouldn't even have started this project.The main changes I made were adding pin retention features to all 10 pins, and slightly adjusting the internal ridges to fit the Amphenol contacts I mentioned in the project readme. Other than that, I made a few very minor adjustments to the outer sleeve, because the original fit was a bit too tight.I didn't plan for it, but I was kinda lucky to have the first batch made in white resin, because that way I could easily identify the spots where I needed to make adjustments, because the white resin rubbed off on the plug. The black sockets in the picture further down the page are the final versions, and they work beautifully.
Who makes these Multicomp Pro soldering stations? - Page 1
Forum section: electronics / general

author: bdunham7
author_rank: Super Contributor
timestamp: February 01, 2025, 05:47:04 am
content: I ran across these while looking for something else. Who makes them and might they be any good?https://www.farnell.com/datasheets/4460630.pdf

author: Whales
author_rank: Super Contributor
timestamp: February 01, 2025, 06:37:47 am
content: Found emHad a suspicion it's a random Chinese manufacturer, so I looked up "dual channel soldering station" on aliexpress.https://www.aliexpress.com/item/1005008082322734.htmlhttps://www.aliexpress.com/item/1005006139755066.htmlIt's an ATTEN GT series soldering station. Exact model number and prices vary wildly depending on peripherals.https://www.atten.com/product/category/gt_series_desoldering_systemMy first temperature controlled station was a cheap-tier 900M-tip style ATTEN. It worked OK for years, but it was nothing fancy.There is some multicomp soldering equipment at my work (EDIT: Heyit's an ATTENtoo!). It's unreliable and moody, the UI sucks, but it works.

author: Shock
author_rank: Super Contributor
timestamp: February 01, 2025, 03:47:43 pm
content: It's Farnell's own rebadged chinese rubbish sold through their stores, same deal for RS they do a similar thing called RS Pro and also use Atten.Imagine how gutted you would feel paying for an RS Pro chinese knockoff that is the same price as the original Hakko.
Budget Audio Amplifier/Receiver - Page 1
Forum section: electronics / general

author: metrologist
author_rank: Super Contributor
timestamp: January 11, 2025, 04:03:48 pm
content: I wanted to put something in my music studio and connect my edrums and listen to music.I found this class of devices and was considering this one:https://pyleusa.com/products/pda69buI picked this one because it has a headphone jack, otherwise there is a similar model that has a better THD spec (<1% vs <0.1%), assuming it's not a typo...Here is a repair video of the latter. What I gather is they are OK build, but may have underspec'd components or marginal designs as suggested in the video. I was also wondering what class amplifier these are.If a no-go, then I have my old Realistic STA-2700.

author: metrologist
author_rank: Super Contributor
timestamp: January 27, 2025, 04:18:02 pm
content: I bought a newer version of the one in the video. I'd like to know what class amplification.Here is a frequency response of my Galaxy cell phone mic using said amp bed by a Feeltech generator and ADS710 speakers.It looks bass heavy? Well, that's because I cranked the bass knob and forgot about it.

author: metrologist
author_rank: Super Contributor
timestamp: February 01, 2025, 05:02:09 am
content: This POS!The left channel started fading 3/4 of its volume. Like I'd be listening to a YouTube channel at relatively low volume and suddenly it sounds like only the right speaker. I tried the FM tuner, BT, and different line inputs and same - and balance knob verified left channel is almost null. Then after having it off for a while it would be normal for a bit.Now I gotta send this Pyle of Shyt back.
Adafruit SMD storage books - Page 1
Forum section: electronics / general

author: pertinax
author_rank: Newbie
timestamp: January 31, 2025, 10:51:58 am
content: I bought a couple of Adafruit SMT storage books in order to store shorter strips of SMD components. Hoping to reduce my piles of unsorted component bags.https://www.adafruit.com/product/520They were resold by electrokit, a local Swedish distributor.Nice format and quality in general, but in my opinion the pages for wider strips have too short sleeves, they don't utilize the full with of the page. The biggest issue, however, seems to be ESD safety. Nothing is said about ESD on the product page, and I guessed it should be good enough. How bad could it be, if the product is intended for SMD components, right? But, upon receiving the books I tried rubbing two pages together. They really built up charge and could raise the hairs of my arm, attract sheets of paper etc. After dropping one page on the floor it attracted all dust and I could see small dust particles jumping around inside the sleeves due to the electric field.No info on material, but from my memory the plastic smells like vinyl.I guess this is OK for resistors or capacitors. But, even then, having these books in the vicinity of other sensitive components at the lab bench just didn't feel right.I ended up ordering a couple of µsleeves from the EEVblog store instead. This was the only similar product I could find.

author: thm_w
author_rank: Super Contributor
timestamp: January 31, 2025, 09:26:54 pm
content: usleevesare way better, full sized binder format, pair with a high quality rigid binder.But as you say these are fine for passive parts, and arrow has them on sale for next to nothinghttps://www.arrow.com/en/products/2183/adafruit-industrieshttps://www.arrow.com/en/products/2184/adafruit-industries
Looking for a desoldering gun, debating reaching higher than the FR301. - Page 1
Forum section: electronics / general

author: adauphin
author_rank: Unknown
timestamp: January 29, 2025, 12:56:25 pm
content: There is a small rant here, so bear with me, but mainly just my dillema. I have been wanting one for a good while, as a hobbyist I do my share of soldering and willing to pay a little more for efficiency and "quality of life"That being said, I know the FR301 has it's following, but I feel the price is too high for what it offers. Sure it does the job, but it has a lop-sided feel, noisy, and IMO, the price seems to reflect when it was the only kid on the block. For the record, I'm fine paying the $325 ish USD for it, but at that price, I'm also willing to go a little more if there is something worth the extra hundred. That's where I feel Hakko has priced the 301, right to the point of contemplating stepping up a notch.That's why I'm asking is it really the best deal under $500? I would prefer a separate base unit that's quieter with more suction, but might be more than $450. I've debated the Yihua 948D but I feel it's a buy twice/should have got the 301 scenario.All thoughts appreciated, I know this topic gets hammered but this is now Q1 2025 and I'm itching to get something.

author: thm_w
author_rank: Super Contributor
timestamp: January 29, 2025, 09:57:10 pm
content: FR301 is $180 from ebay, FR410 is $670. Though both are Japan models.There are some cheap SP440-11 on ebay, but no idea if they are any good, and only 50W.https://www.eevblog.com/forum/reviews/hakko-fr-301-versus-hakko-808-versus-alternatives/https://www.eevblog.com/forum/projects/hakko-fr-301-question/https://www.eevblog.com/forum/reviews/hakko-fr-301-desoldering-tool/

author: adauphin
author_rank: Unknown
timestamp: January 29, 2025, 10:10:40 pm
content: Quote from: thm_w on January 29, 2025, 09:57:10 pmWill this require the resistor mod for 60Hz? Aren't those 100V 50Hz models? I'm in the U.S..

author: adauphin
author_rank: Unknown
timestamp: January 30, 2025, 12:01:56 pm
content: I'm fine with the price of the 301 if it's really the best option under $450-500. I just want to ask here and pick some brains before I purchase.

author: bdunham7
author_rank: Super Contributor
timestamp: January 30, 2025, 02:59:06 pm
content: Quote from: adauphin on January 29, 2025, 12:56:25 pmI had/have/used to use the FR301, which I thought was very good for occasional use although cleaning it and changing tips seemed to be needed more often than expected. Then I got the Pace SX-100/MBT-250 combo and that is so much better that it would be hard to overstate it. I realize it's out of your budget, but if you are patient you can snag deals on eBay for at least the base unit and the SX-100 handpiece is $500-600 all-in with tips and accessories.

author: Fried Chicken
author_rank: Regular Contributor
timestamp: January 30, 2025, 06:57:14 pm
content: I literally just made a post addressing this:https://www.eevblog.com/forum/reviews/my-budget-just-went-up-for-soldering-equipment/msg5801007/#msg5801007
Winkhaus EAV3 door lock unit - Page 1
Forum section: electronics / general

author: alan.bain
author_rank: Regular Contributor
timestamp: January 29, 2025, 11:08:37 am
content: I've been looking at an electronic door operating module made for Winkhaus which isn't working properly. The nasty people have sanded the part numbers of the ICs, but one looks like an H bridge driver for a DC motor and the other some small MCU. On the back there's a 5V regulator (for the MCU).It's a pretty boring thing really runs motor in one direction until photosensor triggers and then presumably runs the other way too but that isn't working properly. I'm suspecting one of the phototransistors isn't saturating and will try replacing, but wondered if anyone had met one of these before? The only schematic supplied explains how to connect the wires to the unit!Alan
Bunnie posts photo of exotic 1980s board ... nobody can figure out what it is - Page 1
Forum section: electronics / general

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: February 01, 2025, 03:26:34 am
content: For context,Bunnie Huangruns a monthly "Name that Ware" competition in which people try to figure out what a piece of tech is just from photos. The latest instalment is a stumper ...https://www.bunniestudios.com/blog/2025/name-that-ware-january-2025/

author: KE5FX
author_rank: Super Contributor
timestamp: February 01, 2025, 05:28:33 am
content: Seems very likely to be some kind of PBX motherboard with expansion cards for private lines, but not clear how to tell what the make/model was.Then again, why would a PBX need only one telco line interface? And a 300-baud modem (MC14412), and a floppy drive controller...

author: Gyro
author_rank: Super Contributor
timestamp: February 03, 2025, 08:17:05 pm
content: From the number and messiness of the Blue wires, it looks as if the designer wasn't entirely sure.

author: coppercone2
author_rank: Super Contributor
timestamp: February 03, 2025, 08:50:13 pm
content: it looks like some sort of electrical component

author: tunk
author_rank: Super Contributor
timestamp: February 03, 2025, 09:06:13 pm
content: A few uneducated guesses: ATM, some bank device, medical instrument, ...

author: Gregg
author_rank: Super Contributor
timestamp: February 03, 2025, 11:07:26 pm
content: wild guess: a multiplexer

author: schmitt trigger
author_rank: Super Contributor
timestamp: February 03, 2025, 11:30:06 pm
content: And this, brothers and sisters, is what 1980s electronics looked like.What I find the most surprising, is that PWBA-layout CAD tools back then were quite primitive, and they would still manage to design such a complex board.

author: Analog Kid
author_rank: Super Contributor
timestamp: February 15, 2025, 01:56:57 am
content: Quote from: coppercone2 on February 03, 2025, 08:50:13 pmThat's anelectronicalcomponent.

author: coppercone2
author_rank: Super Contributor
timestamp: February 15, 2025, 02:20:22 am
content: I think it might open a door to a storage area

author: coromonadalix
author_rank: Super Contributor
timestamp: February 15, 2025, 03:24:26 am
content: i would have said some kind of modem or phone assisted controller, there was some technology involving very low baud rates 1200 or less to control thing far far away ??
Reasonably Priced, Generic Crimp Tool for JST SNAC3 064 Terminal - Page 1
Forum section: electronics / general

author: Doctor Recluse
author_rank: Newbie
timestamp: January 17, 2025, 11:04:42 am
content: Does anybody have experience with JST terminal SNAC3-A021T-M0.64? I'm desperately looking for a cheaper tool to crimp these properly without spending 9K (and waiting 27 weeks). I have already ordered an applicator, but with the 8 weeks we have to wait, I'm looking for a temporary option to do some prototyping. This is part of JST's BMSC automotive connector series as well as a number of other JST series.Thanks in advance

author: shabaz
author_rank: Frequent Contributor
timestamp: January 17, 2025, 12:28:39 pm
content: It might be worth to randomly try a few tools for crimps of an approximately similar size, in the hope that one of those is good enough for prototyping purposes. The datasheet doesn't have all dimensions of the contacts, but perhaps a tool for 2.54 mm pitch pin headers might work crudely enough. There's a thread with various suggestions for that:https://www.eevblog.com/forum/reviews/affordable-crimp-tools-for-small-connectors-(dupont-etc-)/If the thing being prototyped is the board the PCB connector is going to attach to, then if it were me, I'd consider designing a little conversion board, soldered with PCB pins that will fit into the footprint of the PCB connector, and the conversion board would have a cheaper alternative connector (e.g. flat flex, or 2.54 mm pin headers, or screw terminals, or whatever. That board would then be dedicated to prototyping only.

author: tooki
author_rank: Super Contributor
timestamp: January 17, 2025, 03:42:09 pm
content: From the looks of that contact’s geometry, I suspect it won’t be a difficult to find a crimper that works. The overall size of the crimp area is very similar to DuPont, so I suspect most of the crimpers in my big thread (the one shabaz links to above) should work okay.

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: January 26, 2025, 11:02:34 pm
content: I found a 5 nest small terminal crimper on Amazon for $24.00USD, PEBA 2 nests are rounded for the insilation, came next day.I think the model was M3020 made by PEBA.I was looking for one for the smaller Molex terminals, along with removal tools and terminals.Jeff
Aixun T420D or something else? - Page 1
Forum section: electronics / general

author: icanic
author_rank: Contributor
timestamp: January 26, 2025, 12:44:21 pm
content: Greetings!I want to buy a new soldering station for multi purpose soldering (regular electronics, smartphones repair, laptop repairs, tv repairs) so it will be great if it is dual.I am thinking about buying aixun t420d. I have seen that it have torodial transformer but really negative is only that there are no tweezers support.Can someone recommend me some dual stations to buy in about the similiar price range?Thank you!
Bosch Go 3 cordless screwdriver clutch question - Page 1
Forum section: electronics / general

author: electroguy
author_rank: Regular Contributor
timestamp: January 21, 2025, 12:33:20 am
content: Hi, Does anyone have a Bosch Go 3 cordless screwdriver? When the clutch is set to the lightest setting, can you manually screw/unscrew with it? I want to be able to drive small screws on the lightest setting (so the threads on small screws don't get ripped) but then hand tighten at the end. And same for removing tight screws, I want to have high "manual breakaway" torque, then press the button to remove the screw. It's for small stuff, like laptops/TV's/electronics/etc... For big screws I have big drivers, not interested in high torque drivers, so for this task the lower the clutch torque the better.I have the Worx WX242 but unfortunately it's useless for this task because the clutch still activates on whatever setting it's on even when the motor isn't running, so you can't hand tighten or loose/breakaway tight screws. I'm forever flicking the clutch up and down and so now I've just stopped using it.The Bosch Go 3 manual says it can be used manually as a screwdriver if the switch is in the centre position, but what if the switch is in the clockwise/anticlockwise position? Because even though it's slightly better than constantly adjusting the clutch up and down, I still don't want to be flicking switches just to breakaway or hand tighten screws. So when you press it into the screw, the pressure sensor will activate the motor, but then turn off once the clutch activates, if you keep it depressed and turn manually, does the clutch still activate again? Or does it have high manual torque?I know the more expensive drivers can do it, just checking what cheaper options there are before spending big bucks. I was also hoping for something with USB C charging instead of the charging docks like the Panasonic EY7410LA2S etc... but I'll compromise on that.

author: JimKnopf
author_rank: Frequent Contributor
timestamp: January 22, 2025, 04:43:31 pm
content: I tested my Bosch Go (the green one, not the blue Bosch Go 3) with a torque screwdriver up to 3N/m, no clutch so far in screw/unscrew mode. I've never seen a screw in a electronic device which is fastend with 3N/m. I use the Bosch Go for about 5 years now. It's a tool for realy big parts. Even the lightest level 1 is too strong for laptop screws. I don't recommend the Bosch Go for small screws. I would use a Miniware ES 15 instead and if needed, a torque screw driver. I have Wiha 0.8-3.0 N/m (electronic) and a 0.1-0.6 N/m (manually) torque screwdriver.

author: electroguy
author_rank: Regular Contributor
timestamp: January 23, 2025, 12:24:49 pm
content: Thanks very much. I think you are right, too much torque anyway, and also the push to start of the Bosch GO 3 is going to be a major pain.I'll look into the ES15 and that style for my low torque jobs.
Quick 2008 ESD, any good? - Page 1
Forum section: electronics / general

author: drinkinglizard
author_rank: Newbie
timestamp: June 04, 2021, 12:11:47 am
content: A few years back Dave reviewed the Quick 861DW and gave it positively glowing praise.I'm just wondering if the design and build quality was good across the whole range, specifically the 2008ESD as it's price is far more inline with a hobbyist's budget.Has anyone done a teardown/review of the 2008ESD (my google-fu hasn't found anything, well at least anything in english).Better yet, has anyone had hands-on experience with both units and could offer some comments on the cheaper unit and how it compares to it's more expensive cousin?

author: rfleming
author_rank: Regular Contributor
timestamp: August 25, 2021, 09:26:05 am
content: Replying now as I had the same quuestion and I bit the bullet and purchased one. First off I dont actually think its a genuine quick, they don't advertise it on their website at all.I just purchased the 2008 one after looking around for a bit. I was space constraint so I was trying to get a thin profile. In the end I should've just purchased something like this one from kogan australia:https://www.kogan.com/au/buy/gobrandshop-hot-air-desoldering-soldering-rework-solder-station-blower-welding-repair-tools-8464016/Half the price and identical. Though I wouldn't like to use the old iron...Mounting the different attachments has this "bayonet" styled fitting just like in the link. I think the fitting is better than having to locate a screw driver each time. But a friend of mine has the nice quick that you mentioned and that is a push fit. You will also notice that despite it having the same terminating tip like the good one, the Quick 2008 that I have is actually all powered from the handgun rather than a pump within the machine itself like the big unit.I cannot comment on the performance between the 2, though I would suggest AGAINST buying the Quick 2008 and just go for another cheaper knock off like an updated Yihua. One closer to the kogan link like the one I have in the image.

author: drinkinglizard
author_rank: Newbie
timestamp: February 10, 2025, 10:25:49 pm
content: Thanks for that feedback, and apologies for my delayed response. I ended up biting the bullet and just getting the 861dw after all.
Siemens Logo!Power supplies Schematics? - Page 1
Forum section: electronics / general

author: Tangent_Tracker
author_rank: Regular Contributor
timestamp: January 09, 2025, 03:12:42 pm
content: Hi folks, has anyone got any schematics for REP1311 series power suppliers? All main components seem ok, could do with some more info really... Two units (5 & 24v) failed after a brownout but have full 330V at main cap so everything seems ok on the primary side...Any help appreciated.

author: MathWizard
author_rank: Super Contributor
timestamp: January 25, 2025, 01:35:07 am
content: I'm having a hard time finding what they are, search engines are pointing me at Siemens 6EP1331 type models, some with only 5V, or only 24V. But all in little plastic cases.So is it like these ? What about the opened up one ? If that's all there is inside, and time is no big deal, then it should be pretty easy to find a problem.I'm not an EE, so IDK all the ways a brownout might damage or upset a SMPS. What's your mains AC voltage ? Is that 330V the 2x boost voltage of rectified 110VAC ?So what's on the output ? I'd check the Vcc to the primary side controller, then see if it's switching or not. But before I did all that, I'd check it all over unpowered with a DMM. (I'm not in a rush or being paid)
Software for MEI products  - Page 1
Forum section: electronics / general

author: Anayeli
author_rank: Newbie
timestamp: January 18, 2025, 05:39:19 am
content: Good evening. I am looking for advice on downloading software for programming MEI brand coin and bill readers. At the moment I have found the CashFlow STS Advance software but I have not been able to find where to purchase it or download it along with the drivers for any model. In addition, I have specifically searched for the CF 7000 model but I have not been able to find how to connect the device to the computer. I hope someone can advise me on this subject. Thank you very much.

author: thm_w
author_rank: Super Contributor
timestamp: January 20, 2025, 09:27:52 pm
content: What did you want to program? You can configure many settings on the unit itself.CF7000 has a programming port on the front of the unit, either connect to PC or a portable programmer.Did you contact the manufacturer about getting a software license?
hackrf h4m uses - Page 1
Forum section: electronics / general

author: nazmiravnic
author_rank: Newbie
timestamp: January 05, 2025, 10:54:27 am
content: Hi everyone, I just got hold of my HackRF H4M from herehttps://www.sdrstore.eu/software-defined-radio/instruments/hackrf/new-generation-hackrf-portapack-h4m-mayhem-signature-edition-r10-sdr-radio-max2837-with-mayhem-firmware-flashed,and i was wondering are there any known issues with it? I saw some people have problems with the battery and wanted to know if that happens to all or just some with issues. Also what are some other things I could do with it besides listen to radio?

author: asis
author_rank: Frequent Contributor
timestamp: January 05, 2025, 11:52:46 am
content: Hi,The HackRF-mayhem- consumption current is about ~500mA, so the battery discharges quickly.I recommend purchasing a Power Bank.The weak point is the LNA U13, U25 MGA-81563 (you can buy it on Ali...), and the failure is not only due to the impact of "static", but also when connecting +5V power adapters.-The product is interesting and, I assure you, you will be busy for a long time.Watch the lessons on YT.Schemes and SW updates at:https://github.com/portapack-mayhem/mayhem-firmware

author: nazmiravnic
author_rank: Newbie
timestamp: January 05, 2025, 06:11:11 pm
content: Thank you so much for the reply! I've now been using it nonstop for some hours.I will definitely be looking into getting a power bank and going outside with it. It seems fascinating to me how many things it can do. It will definitely keep me busy for a while
Hakko 800L heating element - Page 1
Forum section: electronics / general

author: hicksxxx
author_rank: Newbie
timestamp: March 01, 2025, 02:21:33 am
content: g'day,Just bought a used Hakko de-solding station. Came with heaps of board repair tools etc unfortunately the heater element for the desolding gun is missing.Long shot in getting a new one.Any help would be greatly appreciated!thanks

author: hicksxxx
author_rank: Newbie
timestamp: March 03, 2025, 09:18:35 am
content: Been looking everywhere and this iron is too old. Emailed every Hakko spares part supplier but no joy.Plan B is to retrofit an iron from RS RS PRO Desoldering Gun, 90W Outputhttps://au.rs-online.com/web/p/desoldering-reworking-tools/1372294Contacted a Chinese supplier but they don't have suitable replacement.
NLS MS-215 Scope - Page 1
Forum section: electronics / general

author: Zfrenchy
author_rank: Contributor
timestamp: January 11, 2025, 03:26:11 am
content: I got a Miniscope 215 from Non Linear System. Anyone knows where I can buy the banana plugs for the GND, Trigger and 1V p-p input?I measured with a caliber, seems to be 2.6mm banana plug.

author: thm_w
author_rank: Super Contributor
timestamp: January 13, 2025, 10:17:46 pm
content: 2.5 and 3mm banana plugs exist. Maybe 3 is the right size? Could also replace them with standard sizes.https://www.aliexpress.com/item/1005003269714712.html
HP6236B Triple Output Volt meter replacement - Page 1
Forum section: electronics / general

author: eribla
author_rank: Newbie
timestamp: January 08, 2025, 12:51:06 am
content: HiI would like to replace the Volt meter instrument in my HP HP6236B power supply, but a can't find a way to unlock it from the front plate withoutraw force and possibly braking it. (I still hope I can fix it, as it is "just sticking").Anybody know the trick?? I can provide pictures if needed.THANKS!!!!

author: jonpaul
author_rank: Super Contributor
timestamp: January 10, 2025, 12:15:34 pm
content: Hello: Have many of these fine HP PSU.Meters seldom fail unless dropped. Had same problems. Usually Easy to fix:Meter "Sticking" IF not dropped .....1/ touching plastic face changes ....Static electric charges dry cold environments or with acrylic/nyloc carpets.....Use soapy water, lightly wash face, dry.2/ Sticks at a certain reading. Chip of paint, corrosion, entered the D'arsonval movement.Place on bench , face down.Tap unit lightly till pieces fall out.Chips fall to bottom of meter case after PS is repositioned normally.About removing and replace metera/ impossible to buy the meter movement, custom made for HP.b/ Open up case, meter is held to panel back by clamp and screws.Suggestions: Get complete service manual.Post to other forums: Other equipment is not the best for this topic.EEVblog: RepairsGroups .io: HP/Agilent/Keysight.https://groups.io/g/HP-Agilent-Keysight-equipment/topicsBon Chance,Jon
Need Portapack HAckRf - Page 1
Forum section: electronics / general

author: BondJamesBond
author_rank: Newbie
timestamp: October 13, 2021, 11:07:21 am
content: Dear sir or madam,For a job i urgently need a portapack with hackrf.I am located in the Netherlands.is there anyone willing to sell me one?I am willing to pay upto €300,00 for a complete one with accu and antenna if you can deliver within a month.Kind regards,

author: nazmiravnic
author_rank: Newbie
timestamp: January 05, 2025, 06:09:13 pm
content: there are many options out there. for example I got mine herehttps://www.sdrstore.eu/software-defined-radio/instruments/hackrf/new-generation-hackrf-portapack-h4m-mayhem-signature-edition-r10-sdr-radio-max2837-with-mayhem-firmware-flashed/
Dyson V10 motor PCB - Page 1
Forum section: electronics / general

author: li_gangyi
author_rank: Newbie
timestamp: October 22, 2022, 04:19:16 am
content: Have a weird one, a V10 Motor PCB that will not work in low or medium speed (just pulses once for like 1/4 a sec and gives up), in Max mode it runs, but appears to be a tad slow (scoping the hall-effect output, I see 6.8kHz instead of 7.3kHz on 2 other working PCBs I have, on the same motor).So far I've figured out the following.U7 and it's vicinity are a ~10V buck converter, that voltage is present and stable even after the motor is commanded off with the trigger depressed.U10/J8 vicinity are the battery data lines (differential pair I presume).U4 on the bottom side is the motor hall effect sensor, that same signal is brought out to a test point on the top edge of the board. I have tried swapping in a known good hall effect sensor with no change in behavior.U2 is the 3/3V regulator that supplies the main uC, the speed selector and U4 at least, that voltage is also present and stable after the motor is commanded off with the trigger depressed.What I haven't worked out, is what's tripping the uC to cut drive to the motor, the FETs are not shorted, FET drivers on the top side appear to work properly when scoped.Additionally I tried shorting out the shunt resistor on the bottom side of the board, the PCB will refuse to drive the motor, which is weird (unless the uC is using the current waveform to drive the motor perhaps).What I have yet to do is to extend the motor and hall effect (U4) sensor wires and do some probing around the bottom side of the board.

author: li_gangyi
author_rank: Newbie
timestamp: October 22, 2022, 08:47:43 am
content: Just realized this might be better in the repair section. Mods please do feel free to move this topic.

author: prolux
author_rank: Newbie
timestamp: October 23, 2022, 12:15:06 am
content: It does this if the battery is not delivering the current, Dyson use critical parameters to sell batteries.

author: li_gangyi
author_rank: Newbie
timestamp: October 24, 2022, 07:16:07 pm
content: It's weird how the same motor and battery are working with another PCB though, I have extended out the hall effect sensor and the only difference is the PCB (same sensor in place during swaps). I cannot scope anything different (monitored the current shunt opamp).It's something cool somehow, and if the battery was the issue, I'd expect it to fail driving the motor at maximum speed.

author: turenabo
author_rank: Contributor
timestamp: April 15, 2024, 03:09:39 am
content: thanks, I got same issue, the motor makes a sound like gears slipping then followed by a sound like "dong", then stop... have you find the reason?ln your post, looks like all components are not failed, but the motor doesn't work, have you measured all the components?I'm trying to measure all the components, but there doesn't seem to be any obvious abnormalities.

author: Wal C
author_rank: Newbie
timestamp: January 04, 2025, 07:25:38 am
content: I too have the same issue. It works only on Max. Will be great if someone can share some insights.
T12 Idea for Holder and Sleep Mode - Page 1
Forum section: electronics / general

author: robert574
author_rank: Newbie
timestamp: January 03, 2025, 05:48:10 pm
content: I just bought a Quicko T12-952 station (STC not STM32) (works really well) and need a better stand. I have the 3/4" (19mm) OD aluminum handle and it drops right through all of mine. While I'm at it, I'd like to improve the sleep mode.Edit: I chose to go back and edit this post as some parts have arrived and just wouldn't work.I was looking to add a cycling timer to pulse the shake / sleep switch wire and then ground a wire to the stand on the side of the tip when it was put in the holder to make it sleep.There's very little room inside the station housing around the existing 24VDC supply board and the timer (I bought) will not fit. Next, the shake switch connects the sleep wire to the negative power to the tip, not ground (and it will have some common mode voltage). Also, the internal 24V supply negative side (the board feeding the control panel) is not ground. I measure 10K ohms from 24V neg to ground. Can't just pull the sleep wire low. Sigh....Not to give up though, I ordered a small isolated 24V-24V DC-DC converter (really small, to power from the existing supply) and a much smaller timer with a relay to give dry contacts for connecting the shake switch wire. I can ground the output of the negative of the DC-DC converter and cycling timer module to make the stand connection possible. The relay coil is powered by a PNP transistor so by grounding the base (thru resistor) the relay will stop cycling and remain on to complete the sleep time. I also ordered a different stand that was recommended.The project changed some from the original plan (always does I guess) and I'll add some pictures when it all gets here in case anyone else is interested.
Rebuild broken Hakko FM-206, identification of Irons? - Page 1
Forum section: electronics / general

author: DL8RI
author_rank: Regular Contributor
timestamp: December 13, 2015, 12:04:11 pm
content: Hi!Since some years I have a broken FM-206 lying around. Unfortunately the µC is damaged, so no chance of repair.And before you ask, yes I could get a new PCB as replacement, but I do have a working rework-station and for a "backup" the PCB is too expensive.But I have the unit and nearly all Irons for it and even some replacement-parts (but no working main-PCB), I wanted to give that stuff some use again... What I wanted to do is to build a new "primitive" supply-unit, it's not very difficult, there are some in the net.But one thing, I could not get my hands on, is how the main-unit identifies the irons plugged in. Anybody any idea?Thanks for replies...

author: amyk
author_rank: Super Contributor
timestamp: December 13, 2015, 02:02:17 pm
content: According to the instruction manual, the connectors have 8 pins. 4 are used for heater and sensor, and 1 for grounding, so that leaves 3 more to be used for some kind of ID scheme, or judging by the list of error messages, perhaps it can also detect the heater/sensor resistance.

author: JacobPilsen
author_rank: Regular Contributor
timestamp: December 13, 2015, 08:05:16 pm
content: Two pins are used for heater and sensor connected in series.Martin, do You know czech ERS 50 ???It is mainly compatible with T12 (and their clones) tips.(Only temperature knob will have different scale.)

author: Fried Chicken
author_rank: Regular Contributor
timestamp: January 02, 2025, 04:15:06 pm
content: Quote from: DL8RI on December 13, 2015, 12:04:11 pmAny idea how it broke?I just acquired an FM-206 that's currently on the way with UPS, and I want to make sure that doesn't happen to me!

author: KG7AMV
author_rank: Frequent Contributor
timestamp: January 03, 2025, 02:08:08 am
content: Hakko, May provide the firmware for that.. Sign up atwww.kb.hakkousa.comthen Message them invoke right to repair and see what ya get. will most likely be a Renasas chip.They are slowly providing it.
JBC BT-2BQA buzzing sound - Page 1
Forum section: electronics / general

author: gaminn
author_rank: Frequent Contributor
timestamp: December 25, 2024, 10:19:07 am
content: Hi,I got a brand new JBC BT-2BQA soldering station and when it is heating the tip, it produces quite loud buzzing sound.https://youtu.be/sXBanCWsp00- please turn your up volume as my phone is not able to record a quality sound record.Anyone with this soldering station - is it normal?

author: thm_w
author_rank: Super Contributor
timestamp: December 27, 2024, 08:26:57 pm
content: Can't hear anything at all. Maybe use your phone and a FFT app to see what frequency, 60 or 120Hz I would guess?What if you set the station on top of something soft?

author: Electro Fan
author_rank: Super Contributor
timestamp: December 30, 2024, 09:48:06 am
content: thm_w,Sorry for off topic, but you have a JBC BT-2BQA and some/several JBC clones?

author: thm_w
author_rank: Super Contributor
timestamp: December 30, 2024, 09:30:25 pm
content: Quote from: Electro Fan on December 30, 2024, 09:48:06 amJBC clones only, hakko fx100, fm203, metcal mx5200/5000/ps2e, genuine.

author: Shock
author_rank: Super Contributor
timestamp: December 30, 2024, 11:01:51 pm
content: Inductors like lose coils, cracked core, bad soldering or lose transformer iron core laminations, capacitors including filtering.As power, lighting and equipment noise can also contribute, isolate to another building and retest first.

author: Hydron
author_rank: Super Contributor
timestamp: January 05, 2025, 10:12:21 am
content: This station uses phase angle control for regulation, and any loose ferrous objects (e.g. bits of steel wire that have rolled under the station) can cause buzzing in the leakage field from the transformer.If there's nothing in the vicinity maybe pop it open to check for a loose screw or something? If it's the transformer itself you may be out of luck.
Can this high voltage panel meter meet its specs? - Page 1
Forum section: electronics / general

author: Traceless
author_rank: Frequent Contributor
timestamp: December 28, 2024, 09:02:52 pm
content: Hi everyone,I've recently stumbled upon high voltage panel meters likethis onefor instance (picture linked below). There are three versions rated 1, 2 and 3kV. (The silk screen even states 5kV). The meter uses a 3-wire JST connector, 2 wires are used for the 5V supply the third is supposed to be the sense wire. The insulation on most JST cables I've seen is only rated for 300V, I also have my doubts that the connector is safe at 3kV. Is this dodgy or am I missing something?Cheers Traceless.

author: Zoli
author_rank: Frequent Contributor
timestamp: December 28, 2024, 10:03:11 pm
content: The connector looks like is from the XH(originally JST) series, which is rated for 250V - so the answer is NO.

author: tunk
author_rank: Super Contributor
timestamp: December 28, 2024, 11:18:12 pm
content: No expert, but you may also look at:- voltage rating of the resistor(s)- electrical isolation between high voltage and the5-12V supply (maybe not a problem using a 9Vbattery)

author: bdunham7
author_rank: Super Contributor
timestamp: December 28, 2024, 11:24:30 pm
content: What specs? Do they give any?

author: tooki
author_rank: Super Contributor
timestamp: December 28, 2024, 11:41:38 pm
content: That looks quite questionable to me. I suppose that if they removed one of the pins, then in theory they are juuuuust barely meeting the 1mm/kV rule of thumb, but that makes no allowances for any contamination, humidity, or anything.

author: Traceless
author_rank: Frequent Contributor
timestamp: December 28, 2024, 11:52:51 pm
content: Quote from: bdunham7 on December 28, 2024, 11:24:30 pmWell they kinda give some specs below the picture you have "Customer reviews" and right next to it "Specifications", not that it helps much but here is what the specification box says.QuoteQuote from: tooki on December 28, 2024, 11:41:38 pmYeah that was my thought as well. Originally I was actually more worried about the JST-cable than the connector TBH. Somehow the voltage source needs to be connected to the port. I guess you could put additional heatshrink around at least that should only break down at 600V+. However if Zoli is correct the connector seems to be the weak link indeed with a 250V rating.
FNIRSI DWS-200 200W   doubt  - Page 1
Forum section: electronics / general

author: Jon.C
author_rank: Unknown
timestamp: September 12, 2024, 12:11:17 pm
content: HelloHas anyone tested whether the original JBC tips work on the FNIRSI DWS-200 200Wboth the 245 and 210 tipssince the JBC ones are 120W and this one is 200Thanks!!

author: thm_w
author_rank: Super Contributor
timestamp: September 12, 2024, 10:52:55 pm
content: https://www.fnirsi.com/products/dws-200Wrong forum, asked to move:https://www.eevblog.com/forum/reviews/Yes T245 tips and T210 tips will work with it. Assuming you get both handpieces.Handpiece uses a 5-pin circular connector instead of the official JBC 6 pin. But these are readily available on aliexpress.200W is just what they are claiming the internal power supply is rated to. T245, maybe they will hit 160W or so, depending on their supply voltage and internal power limiting code. T245 tip is around 2.5 ohm so theoretically ~230W is achievable with 24V DC.Though I would not touch this station until we can verify that the tip is properly grounded, after the mess that Aixun left.

author: BFX
author_rank: Frequent Contributor
timestamp: December 28, 2024, 08:51:38 am
content: Tip is not grounded at all. I'm trying to prove if modification is possible.