hybridfree/eevblog-posts huggingface dataset:
Carroll & Meynell 3KVA Isolation Transformer 230V:230V BLUE Box - Review - Page 1
Forum section: electronics / general

author: killingtime
author_rank: Regular Contributor
timestamp: January 23, 2024, 08:23:54 pm
content: Bought a Carroll & Meynell 3KVA 230V isolation transformer for general work. This is my review.There's not that many options when buying an off the shelf mains (230v -> 230v) isolation transformer in the UK if you want or need to pull 3 KVA. This is a handy figure as it works out at 13A (@230V) which is the max rating of a domestic 3 pin fused plug. China sells them, but after shipping it's cheaper to buy this. Also worth noting that all the transformers I've seen on Ali are rated for 220V AC. the voltage at my place hits 250 VAC on occasion. It just means the transformer will heat up and pull more no load current.The 3KVA rating is only intermittent. 5 minutes on, 15 off. But still, this is better than nothing if you only need to run an appliance at max power for a short while. You can take plenty of measurements in 5 minutes. Continuous duty is 1.5 KVA. Weighs 19KG. Cost 130 GBP (inc VAT).Product page:https://www.carroll-meynell.com/product/isolation-transformer-230-230v-3kva-cm3000-230/The yellow box variant of this steps 230v down to 110v, and you'll probably have seen these on building sites. Much more common.Pictures attached.Notes:1) The earth wire loops through from input to output and is bonded to the transformer core. It's wired up internally via a spade connector. They must have guessed people might want to remove earth so they've made it easy.2) Secondary Neutral and Live are isolated from earth. No center tap.3) Has a thermal cut out breaker mounted on the side. The enclosure is plastic. IP55.4) The transformer is potted in what feels like cured epoxy resin. Very hard. It's not the rubbery silicone stuff. You can forget removing this transformer from the box if a winding burns out.5) No load current is 1.6A. 54W. 0.13 PF See picture. I called Carroll & Meynell in the UK to ask if this was normal, and they said yes.6) My transformer is noisy. As in, microwave oven on 100% noisy. I asked Carroll & Meynell if this was normal and they said it can be. Some are, some are not. It just depends on how it left the factory. So the story here is make sure you buy from a retailer that offers easy returns and exchanges. As it's potted in resin, there's no way to tighten the bolts on the lamination either. :-(7) Tech specs measured with an LCR meter @ 100Hz (as low as it would go):Secondary L or N to earth: 0.30nFPrimary L or N to earth: 0.50nF (meas from plug w\lead)Primary to Secondary winding capacitance: 0.28nFPrimary & Secondary combined leakage inductance: 13.5mHPrimary inductance (secondary unloaded): 9.37HSecondary inductance (primary unloaded): 10.0HPrimary resistance (DCR): 1.95 Ohms (goes via thermal breaker)Secondary resistance (DCR): 0.96 OhmsResistive load test using electric heater. Vac rms and Watts:Vin Vout Load------------------244 249 0242 242 800241 239 1300240 233 1950238 222 2850---.
SILVER EPOXY - Page 1
Forum section: electronics / general

author: abcdzyxw1234
author_rank: Newbie
timestamp: January 22, 2024, 12:33:56 am
content: Hi,I need to connect carbon fiber rope and electrical wire together. The connection need to be both physically and electrically strong. It's recommend to use silver epoxy ... cost around 100 USDMG Chemicals 8331D Silver Conductive Epoxy AdhesiveIs there a cheaper alternative ?Thanks

author: Zoli
author_rank: Frequent Contributor
timestamp: January 22, 2024, 12:44:53 am
content: Crimped ferrule?

author: Stray Electron
author_rank: Super Contributor
timestamp: January 22, 2024, 01:09:32 am
content: I tried a couple of brands of silver loaded epoxy about 15 or 20 years ago and I was VERY unimpressed. It costs about $30 for very small tube (1/2 ounce or so) and it was only slightly conductive. It would not work to repair circuit traces and I ended up having to solder in very fine wires to replace damaged circuit traces. I would try a lineman's splice or other STRONG spliced joint to do what you want.YMMV.

author: abcdzyxw1234
author_rank: Newbie
timestamp: January 22, 2024, 01:25:00 pm
content: make a try thanks

author: abcdzyxw1234
author_rank: Newbie
timestamp: January 22, 2024, 01:26:17 pm
content: Someone suggest a crimp ferrule !! Seems good idea

author: Stray Electron
author_rank: Super Contributor
timestamp: January 22, 2024, 02:39:37 pm
content: I think that the problem with a crimp is going to be that it will a stress riser and if you put much tension of the wires that the weaker one will eventually break right at the ferrule.I couldn't think of the name last night but you could also try using a Sheet Bend knot. That is the preferred way to tie two ropes, aka flexible lines, of different sizes together. A Line Man's Splice is good where you have equal size lines and the lines are non-stranded metal wires which can be bend and will hold their shape but with a flexible materiel like your carbon fiber rope, I think the Sheet Bend will work better. The other good thing about the Sheet Bend is that there are six spots where the different lines bear against each other instead of just one so there should be less wear on each line.

author: thm_w
author_rank: Super Contributor
timestamp: January 22, 2024, 10:07:48 pm
content: Quote from: Zoli on January 22, 2024, 12:44:53 amThis is what heated gloves do: carbon fiber heating filament crimped to a normal wire. If the crimp is properly done it lasts a long time.
Pace heater burn-in procedure. - Page 1
Forum section: electronics / general

author: factory
author_rank: Super Contributor
timestamp: January 03, 2024, 07:52:45 pm
content: I've bought an unused Pace TT-65 tweezer, it came with no paperwork, the older Pace equipment I've used over the years had a procedure for heater burn-in, to supposedly extend the life of the heater elements, the manuals online refer to info that comes with a new heater, which of course I don't have.Can anyone help with info on the procedure, or is it no longer required?David

author: thm_w
author_rank: Super Contributor
timestamp: January 03, 2024, 10:37:35 pm
content: From the manual:Quotehttps://esd.equipment/media/pace/tt-65.pdfWhich is the same recommendation as their "burn in" procedure, run at 315C for 10min or so then increase it. Increasing it won't do anything, its just the reasonably low temp to start that might have some effect on settling in (vs setting it to 500C right out of the box).

author: factory
author_rank: Super Contributor
timestamp: January 21, 2024, 06:37:06 pm
content: Thank you, I've done the burn in at 315°C for 10 minutes.It didn't come with a stand, they always seem to be sold separately, I going to modify another one I found, as the Pace one is too expensive and no second hand ones are available at the moment.David
handskit tweezer to use with ksger 2.1s possible? - Page 1
Forum section: electronics / general

author: gobris
author_rank: Newbie
timestamp: January 16, 2024, 08:12:04 pm
content: Hello,I am using KSGER 2.1S with default fw 2.12 for more than a year and results are quiet satisfactory.A few weeks ago I bought a tweezer handskit T12, assuming T12 is a standart and might be compatible with ksger.But when I turned on the station I had error message on LCD.So, my question, is it possible to use this tweezer with ksger station with some HW or SW mod?Or should i forget about itRegards

author: thm_w
author_rank: Super Contributor
timestamp: January 18, 2024, 10:50:03 pm
content: Just had a thread with links:https://www.eevblog.com/forum/reviews/any-decent-inexpensive-smd-tweezers-for-ksgerquicko-t12/
Any decent inexpensive SMD tweezers for Ksger/Quicko T12? - Page 1
Forum section: electronics / general

author: shapirus
author_rank: Super Contributor
timestamp: January 12, 2024, 11:09:31 am
content: Basically $subj. Looking for a tweezers-style double-tip handle/attachment for the Ksger/Quicko T12 soldering stations to desolder SMD components. 5-pin connector, v2.1, STM32.Does anyone know of anything that works (decently enough), preferably on Aliexpress?There are some "handskit" tweezers which are supposed to be used with the same brand's soldering stations -- any idea if they will work with ksger/quicko?

author: thm_w
author_rank: Super Contributor
timestamp: January 12, 2024, 11:41:42 pm
content: Please read:https://www.eevblog.com/forum/reviews/budget-soldering-station-with-hot-tweezers/https://www.eevblog.com/forum/testgear/using-quicko-t12-952-soldering-station-with-2-tips-(as-soldering-tweezers)/https://www.reddit.com/r/soldering/comments/14p7iie/converted_20_handskit_hot_tweezers_to_work_with/https://www.eevblog.com/forum/reviews/any-opinions-on-the-aixun-t3a/msg5108808/#msg5108808
XGecu T48 command line software for Windows - Page 1
Forum section: electronics / general

author: DMartens
author_rank: Contributor
timestamp: January 12, 2024, 09:34:14 am
content: On Linux/Mac, command line-based programming of the XGecu T48 programmers is typically done using the minipro software.Is there a command-line software I can use under Windows? I can use the XGecu GUI-based software but I want to use batch-files.Any suggestions?
Slightly outdated MEDAR industrial spot welding rig - Page 1
Forum section: electronics / general

author: applicanon
author_rank: Contributor
timestamp: January 31, 2020, 06:36:53 pm
content: Found a rather industrial scale spot welding unit in the scap pile and thought I may make use of the components.unfortunately I made the mistake of tearing down the most of it without much documentation to back it up.now that I've gotten a handle of what sorts of power electronics I've got and how the work, I'd like to put the unit 'somewhat' back together as to utilize it for my own project.The machine came equiped with a beefy SCR based 3 Phase full bridge rectifier, followed by a substantially energetic DC link, and finally rounded up with an IGBT based H-Bridge for the power punch.I've got full intention on salvaging the gate drive circuitry components for the IGBT's as they were engineered along with a substantial snubber protection circuitry equiped, and it only makes sense to reuse what's already been dialed in for me.The project end goal would be either an induction heater or a tesla coil, or possibly the ability to remove the IGBT drive unit as a modular system which could be swapped from one project to the other as needed.Now that I've got all that out of the way..... On with the stumbling blocks!The original system was based on PLC technology which controlled both the SCR 3 PH rectifier which would chop it up accordingly to provide the desired DC output voltage, followed by a DC capacitor bus for smoothing, and then a large IGBT h-bridge section for producing medium frequency dc pulses for the spot welding.Here's a question I have...There are two current transducers for measuring the output of the IGBT H bridge. One on each output leg. There are also something like 6 turns of wire which loop through each of the current transducers as well. Upon disassembling this system, I took off those extra turns and can't for the life of me remember where they were connected and / or what their purpose was in the circuit.I have a half ass guess that it may be to do with sensing a shoot through situation, the current transducer tripping a fault, saving the high power IGBT's, but even if this were the case, I'm not sure how it was implement them.Anyone else have any insight as to what the additional windings may do?Any input much appreciated!Pictures of system now (without the extra windings, and further pictures of how system was originally built with the extra windings thru transducers)

author: ow19m
author_rank: Contributor
timestamp: January 11, 2024, 02:03:07 pm
content: Hello Sir ,Any Update on the welding inverter you designed yourself ? what was the response for the calculated snubbers used by Medar ? What is the power rating you were using to weld ? Thanks
T12 956/959 or BK96D Plus - Page 1
Forum section: electronics / general

author: kPATm
author_rank: Regular Contributor
timestamp: January 08, 2024, 10:24:53 am
content: Hello. I currently use a Ts100 and recently Iv been trying some very small smd wirk and I feel the ts100 tips ar too big for the job. I have been looking at picking up a T12 of some sort.https://a.aliexpress.com/_mKLLVOshttps://a.aliexpress.com/_mrcsNNAhttps://a.aliexpress.com/_mPbeOtSAny thoughts on these. I feel like the Ts100 diesnylt have a great choice of tips and at £14 each they are a bit expensive. Thanks for looking.

author: thm_w
author_rank: Super Contributor
timestamp: January 08, 2024, 11:18:12 pm
content: What TS100 tips specifically? and what SMD sizes?T12 is not going to be that much better, and is not great performance for small size tips as the sensor is quite far from the tip.You'd be better off with T115 or T210 for microsoldering.The absolute cheapest is something like this:https://www.aliexpress.us/item/3256805333492504.htmlOr you can get a Aifen full setup or similar.

author: kPATm
author_rank: Regular Contributor
timestamp: January 09, 2024, 09:43:57 am
content: I didnt know about the T115 or T210. Those look a lot better for what I want to do. I want something to mod Nintendo Switches so something pretty small is what I need.After having a look into it I think I may go for an Axiun T3b. Any thoughts on that model?

author: thm_w
author_rank: Super Contributor
timestamp: January 09, 2024, 11:08:34 pm
content: We can keep the discussion here.Either of those models you listed in the other thread should be fine. Some people might prefer an integrated unit or some with the separate base.Do you have hot air for the USB C port and power IC?

author: kPATm
author_rank: Regular Contributor
timestamp: January 10, 2024, 06:04:57 am
content: I do have a hot air station

author: kPATm
author_rank: Regular Contributor
timestamp: January 10, 2024, 06:41:06 am
content: I think Im leaning towards the T320. The only thing holding me back is the fact that it doesnt support the T115 tips. Are the T210 tips much bigger than the T115s?
Suitable setup for Nintendo Switch Repair - Page 1
Forum section: electronics / general

author: kPATm
author_rank: Regular Contributor
timestamp: January 09, 2024, 03:53:29 pm
content: Hello. Im looking at picking up an iron kit thats suitable for small SMD work specifically on the Nintendo Switch.I have been looking at what Aixun has to offer and Im assuming I would be looking at a T115 size handle but Im not sure.Heres a couple I have been considering. My budget is about £100 Im willing to go over budget if needed but not by muchhttps://a.aliexpress.com/_EQr8oShhttps://a.aliexpress.com/_ExmwJ2H(T3b model)Thanks
Teardown: "OZV8E" HDMI audio splitter - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: January 09, 2024, 03:04:41 pm
content: I got a cheap 7.1 HDMI audio splitter to try to solve a problem with my home theater setup, turning on/off the audio system causes the monitor to blank for a few seconds as the older HDMI splitter I was using renegotiated the link.There's an IT66322E handling the pass through of the main HDMI signal, some mystery chip handling the HDMI audio output, and another mystery chip for the S/PDIF and analog outputs.Pros:* Solves the problem I had, connecting/disconnecting audio output does not renegotiate the link.* Theoretically will be the last splitter I should ever need to buy for my 7.2 audio setup, once I upgrade to a monitor with the resolution above 4K, I can use the splitter in eARC mode. (Cannot test as I don't have a monitor with eARC yet.)Cons:* Included PSU really poor quality.* USB-C power input does not have 5.1k pulldowns, meaning better quality PSUs may not work.
So what do the specs on a neon sign transformer actually mean? - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: January 06, 2024, 12:47:10 pm
content: Is the output voltage specified an end to end measurement? Or is it end to midpoint? Remember that most neon sign transformers are midpoint grounded. Also is the voltage an RMS measurement, or is it the peak voltage, or even peak-to-peak voltage? Also, what conditions are this measurement made under? Is it open circuit voltage? Or is it the voltage while a reasonable load (a neon tube) is attached?Likewise with the current, is this the RMS, peak, or peak-to-peak current? And is this current measurement one of the short circuit current? Or is it the current when a reasonable load is attached?

author: Gyro
author_rank: Super Contributor
timestamp: January 06, 2024, 12:52:21 pm
content: End to end. RMS, not that it makes any difference with a sine wave. Measured at rated current, which is at normal load, not short circuit. What you'd expect really.

author: Stray Electron
author_rank: Super Contributor
timestamp: January 06, 2024, 01:35:56 pm
content: FWIW ALL of the new-ish Neon Sign Transformers that I have seen are switcher power supplies and not just a big transformer. I don't know what their output looks like.

author: Ben321
author_rank: Frequent Contributor
timestamp: January 06, 2024, 09:53:03 pm
content: Quote from: Gyro on January 06, 2024, 12:52:21 pmActually it does make a difference with a sinewave. You have to multiply by sqrt(2) to get from RMS to peak. RMS has to do with heating effect. A 120v RMS ac source will heat the load just as much as a 120v dc source, due to the fact that the heating effect is based on average power, which is based on the RMS ac voltage.However when you are talking about starting a gas discharge tube like neon, the peek voltage is more important. If a gas tube has a breakdown voltage of 5000v, that means the gas will ionize at either 5000v dc, or at 5000v peak ac. Not at 5000v RMS ac. 5000v RMS gives a peak voltage of 7071v. Remember that while heating a material takes a significant time (multiple ac cycles at 60hz), to ionize a gas takes only a few nanoseconds of exposure to a high enough voltage. So the peak voltage of the ac waveform is the most important value when talking about gas discharge tubes. I'm quite surprised to learn that the voltage on a neon sign transformer is the RMS voltage, not peak voltage, as neon sign transformers are specifically intended for running gas discharge tubes.
What model is this Weller pencil soldering iron? - Page 1
Forum section: electronics / general

author: penright
author_rank: Contributor
timestamp: January 05, 2024, 02:24:04 pm
content: I have asked this in other forums without much luck. Also, have reached out to Weller who asked for some pictures and has not responded since I sent them.I have this old Weller soldering iron that was issued to me at my first job in the early 80's. It has a lot of sentimental value to me. I was going to order some new tips and the one that is on it currently is attached very well.What is the model? How can I disassemble it? The heating element looked okay, but there was some sort of ceramic in the metal tube that shattered as I pulled it off.

author: GLouie
author_rank: Regular Contributor
timestamp: January 05, 2024, 06:52:08 pm
content: It looks like you received some info on other forums, but it looks to me like a variant of the Weller SL335:https://www.weller-tools.com/bigbang/USA/us/SL335I say variant because you obviously have a different heater (#127S, 27watt), and similar models were sold under the Ungar name, and we know Weller bought Ungar:https://www.ebay.com/itm/294394355185?chn=ps&mkevt=1&mkcid=28&srsltid=AfmBOoq_ivPnHG2n5QrcXyY41kf2ZSXlVLzjux0en9zDf3N1fXb0CE3BFYMThey may have changed the design over the years, as yours has black plastic at the base of the shaft. The tips appear to be screw-in and the iron non-temperature controlled.Is there no info stamped on the steel disc at the base of the heater shaft?

author: penright
author_rank: Contributor
timestamp: January 05, 2024, 07:56:21 pm
content: Quote from: GLouie on January 05, 2024, 06:52:08 pmThat sure looks close. I had 3 screws holding down the metal part.Quote from: GLouie on January 05, 2024, 06:52:08 pmNot that I can see.Update:--------After doing some searching, I found a picture of the heater and it is the screw-in kind. I am not sure how mine is attached.

author: GLouie
author_rank: Regular Contributor
timestamp: January 06, 2024, 05:56:16 am
content: This ebay offering looks like the item. Apparently, Ungar sold the same iron with 27 watt, 35 watt and 45 watt heaters. The ebay item shows the 35 watt version, and even has a photo with assembly diagram. I believe you have a #1270 iron. You may not be able to remove the screw-on tip due to heat-corrosion, but I would think that any tip for a 1270, 1350 or 1450 should fit.https://www.ebay.co.uk/itm/224380091108
Pace MBT-250 Short Motor Run? - Page 1
Forum section: electronics / general

author: Bill Kelso
author_rank: Newbie
timestamp: December 28, 2023, 10:37:56 pm
content: Hi, I did my do diligence and searched a few Pace MBT-250 threads but no answer to my problem.Picked up a Pace MBT 250 for cheap. Just the unit Less the attachments. Anyway two of the plug in Accessory connectors worked Ok.. # 3 on the right did Nothing after I plugged in my Pace Soldering iron. Dead. So I did some searching and found that the header connector on the Mian board had two bad cold solder joints.Resoldered them up and Bingo! It works fine like the Pace 250 MBT I have on my bench. Now here's the rub. Of course some electron monkey was in there playing repair tech. There is a sticker on the board that says "Won't Allow Motor to Continuously Run" Well when you press the trigger on the Pace DE soldering tool it runs. But doesn't after run when you release the triggerBut..... Mine works and keeps the motor on for about 1 second. The unit I picked up stops the moment you release the trigger. However.. it does run fine and has plenty of Vacuum.Trying to figure out what circuit keeps the motor on for about 1 sec. I have the manual and I'm looking at Page 59. Now all I have to do is figure out how they delay the run Voltage on.Any Ideas?Also This unit does not have nor does it look like it was built with an internal Visa Filter as the one used on the front with the DE soldering tool. It Is A Pace MBT-250 " PPS -85 Serial # 03-08 056.I did see a thread here about Pace Motor Vacuum problems. But nothing on Motor run time.Thanks In Advance.

author: Halcyon
author_rank: Unknown
timestamp: December 28, 2023, 11:19:01 pm
content: Duplicate post.
Info wanted: Novalane Lambda 5 GSM  - Page 1
Forum section: electronics / general

author: wofritz
author_rank: Contributor
timestamp: December 23, 2023, 11:31:39 am
content: I am searching for info about a Novalane Lambda 5 GSM alarming unit (see picture). Novalane is a Finnish company without an English web page.We got this with our Ala-Talkkari 500 kW wood chip furnace in 2018 but never used it. It has 3 24V alarm inputs and sends SMS to registered numbers if an alarm occurs.I have a very short English manual which might be OK for putting it into service, but I would like to know more about it.Maybe I am lucky and someone here knows that thing and has some information (manuals etc.). Finnish documentation welcome!Happy Holidays!

author: wofritz
author_rank: Contributor
timestamp: December 23, 2023, 12:56:23 pm
content: Reply to my own post:I found an RS.232 serial interface on the green circuit board.After power on it sends "GECON 7" and a search for that returned a manual. Rest of the unit is trivial (coupling relays, DC converter, battery charger) so I am happy now.
Knipex ESD pliers storage - Page 1
Forum section: electronics / general

author: celticray
author_rank: Newbie
timestamp: December 17, 2023, 10:15:16 pm
content: Im looking for opinions/recomendations on storing the 79 series Knipex ESD pliers(and 34/35 series ESD cutters) storage.I bought the 6 piece set which came with a storage pouch but t ehy dont sell this pouch seperately.Please me know options of storing these pliers as I probaly have 12 or so. I would put them in a Kennedy tool box but thats not an option now so I was hoping others with these or similar size would let me know some optionsThanks!!

author: Arts
author_rank: Regular Contributor
timestamp: December 18, 2023, 12:20:18 am
content: What type of storage are you looking for, fixed or portable?Amazon has a lot of options for tool rolls, pouches and wall-mounted storage systems.

author: celticray
author_rank: Newbie
timestamp: December 18, 2023, 05:28:12 am
content: Im looking for something similar to the Knipex 6 pc pouch which fits the pliers perfective been to Amazon but most are for larger pliers/tools. I was hoping someone with Knipex or similar size pliers would give me some ideas on how they store them

author: GLouie
author_rank: Regular Contributor
timestamp: December 19, 2023, 05:46:05 pm
content: I don't know a product, but would guess someplace like aliexpress would have them.For reference, I think this is the set OP refers to:

author: coppercone2
author_rank: Super Contributor
timestamp: December 20, 2023, 03:30:42 am
content: I get a big bracket shaped piece of metal [ and weld it to a plate then let the pliers sit on topthey get a bit dusty but its good to oil them when its cleaning time instead of forgetting about it in a case

author: celticray
author_rank: Newbie
timestamp: December 22, 2023, 06:19:59 pm
content: turns out they sell the empty pouch 00 20 16 LE
Controlled Environment IC Storage Chamber Recommendations - Page 1
Forum section: electronics / general

author: c#
author_rank: Newbie
timestamp: December 14, 2023, 06:32:50 pm
content: Hi,I'm involved in a small company that sells hardware, and we're making a long-term investment by purchasing a large number of ICs upfront. We're wondering: what are the best practices in industrial settings for storing these devices for years?My most outstanding concerns are temperature and humidity. Our scale is small -- we're looking for something that can fit on a benchtop or in a corner of a room. Do you have recommendations for storing ICs and semiconductor devices that fit this criteria?Sorry if this was previously discussed; I had no luck in my own search. Thank you so much!!

author: coppercone2
author_rank: Super Contributor
timestamp: December 21, 2023, 04:57:05 am
content: humidity membranes exist and could be put into a cabinet to control humidity but IDK how low they can go.https://www.micro-dehumidifier.com/membrane-selection/it looks like <10%is that good enough or better then beads, IDK. otherwise you need a shit load of gaskets and stuff. I think the memebranes might be able to take a bit of leaking so long its fairly dry near the cabinet. With silica your gonna flood.probobly any solution is shit in a humid enviroment down south or whatever
SORNY ROONG INDUSTRIAL SL-928 desoldering station temperature sensor failure - Page 1
Forum section: electronics / general

author: smile
author_rank: Regular Contributor
timestamp: October 25, 2021, 04:40:18 pm
content: Hello, I have the SORNY ROONG INDUSTRIAL SL-928.Not many hours on the unit of usage, ~48hrs, but it's 3 years old. So no warranty.The heating element heats up, but temperature display shows 7C instead of actual temperature. I tested the handle the temperature sensor is OK shows 20C when connected to DMM temperature mode, heating element is heating so it's OK.I'm looking for schematics any help.

author: smile
author_rank: Regular Contributor
timestamp: October 25, 2021, 07:25:46 pm
content: I tested the 3 transistors C1815L they seem fine, the LM358P DIP8 don't know, tricky to test. There a no other parts between Thermocouple and main IC chip.Thermocouple give me 0.3ohm value and measures 20C on DMM switched to temperature range. Maybe it's dead.

author: HumbleDeer
author_rank: Contributor
timestamp: February 05, 2022, 03:40:14 am
content: Have you managed to fix your station?You can test the thermocouple by using DC Volts to measure the voltage across the junction. Heat it up a little with something like your hot air gun, lighter from a distance, whatever is not too stupidly hot.

author: smile
author_rank: Regular Contributor
timestamp: December 20, 2023, 10:20:40 pm
content: Decided to post the way to resolve this is to buy new heating element PENSOL-SL916-GHthis code works on tme.eu website. The hour used before the element was damaged is very very low.Now I do not run hotter then 380C, and always use hot air assist to actually use this thing as the 50W heater is really a joke on any multiplayer board.
EU - Multi 5V Power Supply? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: December 18, 2023, 10:31:42 pm
content: HiI have multiple equitment who also Power USB Device who all need an 5V Source. Since I dont want any noisy power supply I tought why not buy a good 5V one who can deliver the power to Variose small Adapter, USB Hub and so on?!Can someone recommend any? Since the local "Conrad" Stores closed down I cant just walk in there and grab one of the shelf.Thanks
OSS Team T245 Soldering Station stopped functioning after hot swap of tips - Page 1
Forum section: electronics / general

author: kaien
author_rank: Newbie
timestamp: April 12, 2023, 01:51:44 am
content: I bought the OSS Team T245 Soldering Station on Aliexpress. Initially, I had wanted the GVM T245 model, but the seller sent me the OSS Team version instead, claiming that they were essentially identical.Based on the pictures of both models, the GVM and OSS Team soldering stations appear to be nearly identical, and in fact, OSS Team is the OEM manufacturer for GVM's station.During my initial usage, I found that the OSS Team T245 heats up very rapidly. However, when I attempted to hot swap tips, the unit suddenly ceased to function after I inserted the second tip. I suspect that this is because I failed to eject the tip before unplugging it.Fortunately, I had also bought the AiXun T3A as a backup option. So, now I have one functioning soldering station and a spare for troubleshooting purposes.Every time I replace the 3A fuse, it blows again, which leads me to believe that there is a short circuit somewhere on the board.

author: thm_w
author_rank: Super Contributor
timestamp: April 12, 2023, 10:10:55 pm
content: Take it apart and post some photos.Look for a large FET near the output connector going to the soldering handpiece. Measure it and see if its shorted out.Although blowing the fuse is odd as you say.If the internal 24V power supply can be disconnected from the soldering section, then you can narrow down where the problem is.

author: kaien
author_rank: Newbie
timestamp: April 15, 2023, 04:10:19 am
content: After dig around, looks like the RS1M & 20N60C are bad, waiting for spare parts.

author: elektryk
author_rank: Regular Contributor
timestamp: December 15, 2023, 01:03:07 pm
content: Did you managed to repair this power supply?Its interesting that this PSU looks different than in OSS T12X+.
Pro'sKit breadboards - Page 1
Forum section: electronics / general

author: VSV_electron
author_rank: Regular Contributor
timestamp: January 15, 2024, 11:21:41 pm
content: I own quite a bit of various precision tools from Pro'sKit, a Taiwanese company - mainly pliers, cutters, screwdrivers etc. Most of their tools are of very good quality. Some are great. There are online reports of not so good ones, why not? - It happens.Have any of you owned and used Pro'sKit breadboards? Are they anything like Wisher quality?I can't find breadboards on their official site but in the Amazon description and in some other online retailers specs it's stated that the materials are: ABS/Phosphor BronzeIf they are anything like Wisher quality I'd get a few boards to try them out.For reference (they are unavailable now on Amazon):https://www.amazon.com/ProsKit-900-249-Breadboard-Points-Phosphor/dp/B0046QVRYWhttps://www.amazon.com/ProsKit-900-247-Round-Breadboard-Points/dp/B0046R0VXO

author: VSV_electron
author_rank: Regular Contributor
timestamp: January 15, 2024, 11:37:28 pm
content: I searched online and found a large Pro'sKit official catalog where on page 193 (per pdf footnote numbering) you can see all 3 Pro'sKit breadboards that they sell.The catalog ads confirm that the contacts are phosphor bronze.Here:https://proskit.co.id/proskit_cat_v30.pdf

author: tatel
author_rank: Frequent Contributor
timestamp: January 16, 2024, 06:36:04 pm
content: Many years ago I got one quite similar to those blue plates. It looks as if coming from the same maker. Since then, I never got anything that kind of quality until I got a couple of Wisher's. I got another couple of good ones, not Wisher, but can't remember the brand and I'm far from home right now.I like Proskit. If you finally get one of these, please report

author: VSV_electron
author_rank: Regular Contributor
timestamp: January 16, 2024, 07:35:39 pm
content: Quote from: tatel on January 16, 2024, 06:36:04 pmThanks much for your reply!Something tells me but it could simply be my own fantasy that those Pro'sKit boards can come from Wisher.To comfirm that I would have to buy the one from Pro'sKit and open it up to compare it to Wisher's internals. I think I'll get couple boards from Pro'sKit. I still hesitate at the moment. I need some courage :-)

author: Veteran68
author_rank: Frequent Contributor
timestamp: January 16, 2024, 09:38:33 pm
content: This Makeronics brand claims phosphor bronze construction and are available. They have different sizes as well.https://www.amazon.com/dp/B07N3QRV4JQuote

author: tatel
author_rank: Frequent Contributor
timestamp: January 18, 2024, 10:36:01 am
content: You can get wisher's on TME:https://www.tme.eu/en/katalog/universal-pcbs_100110/?art=WBU-502L&page=12

author: tatel
author_rank: Frequent Contributor
timestamp: January 18, 2024, 10:50:13 am
content: I remember now: it was a K&H breadboard.https://www.kandh.com.tw/electronic-training-equipment-and-breadboard-accessories.htmAlso from Taiwan
Car fuse holders - Page 1
Forum section: electronics / general

author: mandor
author_rank: Regular Contributor
timestamp: December 10, 2023, 02:21:19 pm
content: Where to get car style fuse holders? What I find online usualy come with short wires atached. Is there some fuse holders made to crimp or solder the wires on them?So, I'm into ham radio. Because I wanto to be able to move around my radio, I'd like to have multiple DC power leads. At my workbench, my car, my station, whatever.So I thought I have plenty of thick wire, why not make my own. But leads come with fuses. Sure you can buy leads, but can be dodgy cross section or expensive or I want them a bit shorter or longer.

author: madires
author_rank: Super Contributor
timestamp: December 10, 2023, 03:48:47 pm
content: reichelt.de:- IMAXX H1295- MTA 100590- IMAXX H7210

author: mandor
author_rank: Regular Contributor
timestamp: December 10, 2023, 05:14:19 pm
content: Something like this t.ly/eVQWh just without the wire?This is what original cable looks like.https://www.dxengineering.com/parts/ico-opc-1457

author: Kim Christensen
author_rank: Super Contributor
timestamp: December 10, 2023, 05:38:43 pm
content: Isthis the kind of thingyou want?There is alsoa chassis mount type.

author: TomWinTejas
author_rank: Regular Contributor
timestamp: December 11, 2023, 04:51:24 pm
content: What about something like this? I just ordered one for a LED undercabinet lighting project I'm preparing to do.https://www.aliexpress.us/item/3256805926606177.html

author: mandor
author_rank: Regular Contributor
timestamp: December 12, 2023, 01:36:27 pm
content: Something like this would be eqivalent t.ly/Njfh3 but they all seem to have red wire which I would need to connect on both sides again. And why always red??Then there is something like this t.ly/Yj-Je which I don't know how trustworthy is on current rating and reliability or how thick wire are they for.

author: Kim Christensen
author_rank: Super Contributor
timestamp: December 12, 2023, 04:12:24 pm
content: Quote from: mandor on December 12, 2023, 01:36:27 pmProbably because they are for automotive/cars where the fuse normally goes in the positive lead and rarely the negative. In most cars, red is the standard color for a positive power lead.

author: thm_w
author_rank: Super Contributor
timestamp: December 12, 2023, 10:21:59 pm
content: Quote from: Kim Christensen on December 12, 2023, 04:12:24 pmMakes sense. We buy these for positive and negative, and the supplier solves it by putting black heatshrink over the red wire.
ANBERNIC Q2 - Retro Handheld - teardown - Page 1
Forum section: electronics / general

author: weiman
author_rank: Newbie
timestamp: September 16, 2020, 05:19:18 am
content: Hi Guys,I came across this dirt cheap handheld gadget and could not find any information on it. So I decided to purchage one and open it up to see what makes it tick.It's called the ANBERNIC Q2, product link here:https://www.banggood.com/ANBERNIC-Q2-8GB-1000-Games-Retro-Handheld-Video-Game-Console-NES-SFC-GBA-FBA-SMD-Game-Player-Support-Dual-Player-With-Gamepad-p-1727965.htmlThe main SoC is a qfn 144 chip. The package seems to be remarked, so no useful information on this. Notice that there isn't a RAM to be found. Could it be that this is a System in Package with the RAM die inside ?!There is also a SPI flash: 25Q128FV.Let me know what you think.

author: Waterroca
author_rank: Newbie
timestamp: January 05, 2024, 02:19:21 pm
content: Anbernic is a chinese brand, i just notice a handheld game called playdate, in my view this anbernic Q2 is a cheap replica of the playdate, and as a chinese i didnot find this in china shopping app so i think it is face for foreign mark. i am interested in this games console，but i also cannot find more infomation, now i try to join the official group to ask them
eInk Tablet/Reader recommendation for datasheets and PDFs? - Page 1
Forum section: electronics / general

author: sausage
author_rank: Regular Contributor
timestamp: December 05, 2023, 03:58:03 am
content: Could anyone recommend an eInk reader that you have used for datasheets, manuals and general study?Ideally I'd like one that is easy to quickly navigate/scroll/zoom around like flicking through a real book, bookmarks etc. Writing notes on datasheets would be nice too.A reasonable price would be a positive.

author: abeyer
author_rank: Frequent Contributor
timestamp: December 05, 2023, 08:30:55 pm
content: None of them I've tried are particularly fast to navigate and jump around like that. Not horrible, but that's not what they excel at, either -- they're much better for more linear reading a page at a time.I have a remarkable and love it for notetaking and reading, but wouldn't use it as a quick reference source like that. The boox ones seem a little more fluid/fast for navigation, though still not sure they'd be my first choice. I played with one of the new kindle ones for a minute and felt similar to the boox, but more locked into the amazon ecosystem, of course.

author: sausage
author_rank: Regular Contributor
timestamp: December 06, 2023, 04:43:50 am
content: Thanks, abeyer. I'll see what options are around in 12 months.

author: dferyance
author_rank: Regular Contributor
timestamp: December 06, 2023, 02:07:46 pm
content: I have a boox and I like it. But epaper has major limitations that aren't going away anytime soon. So either get one and be happy with the tradeoffs or don't. But waiting 12 months won't help. epaper has made small improvements over time but nothing like what happened with LCDs.

author: sausage
author_rank: Regular Contributor
timestamp: December 07, 2023, 01:31:27 am
content: I don't mind the limitations of e-paper, that's not a bother, but the interface and jumping around quick would be nice. These are purely UX nice-to-haves and I'm sure usability will improve over the next year or two.
Weller ag 701-s does it need external air? - Page 1
Forum section: electronics / general

author: hhhh
author_rank: Contributor
timestamp: September 06, 2018, 04:35:06 pm
content: Hi!Does Weller ag 701-s need external air or is it self-contained? Includes hot air pencil, vacuum pick-up tool and paste dispenser.I'm also looking for a manual if anyone has it.Thanks!

author: vijay
author_rank: Newbie
timestamp: December 02, 2023, 06:34:40 am
content: Hi to Allanyone have Weller AG 701 S internal pipe diagram or Picture's to reconnect pipes. my unit pipes are broken and don't have details with me to replace pl share if anyone have
How much pressure is actually in a mercury xenon short arc lamp? - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: November 29, 2023, 10:14:46 pm
content: While all short arc lamps run well above atmospheric pressure when hot, I know that pure mercury short arc lamps have cold pressures below atmospheric pressure, while xenon short arc lamps have cold pressures above atmospheric pressure (and the pressure goes even higher when hot). But I don't know about the cold pressure in mercury xenon short arc lamps (lamps that have xenon as the starting gas, but mercury as the running gas). One place I read years ago claims for mercury xenon lamps, the cold pressure is approximately at atmospheric pressure, but I can't find this info verified elsewhere. Can somebody here let me know what the cold pressure of mercury xenon short arc lamps are?

author: Gyro
author_rank: Super Contributor
timestamp: November 29, 2023, 10:51:25 pm
content: Lots!According to a Philips research paper I read (attached), in order to create a continuous spectrum and bring up the red, UHP Mercury vapor lamps for projectors run at 200 bar or more... that's 3000psi.The ignition mechanism is interesting too.EDIT: On re-reading, I see you are looking for the cold pressure. I believe this is way above ambient as they pose a significant handling explosion risk.

author: themadhippy
author_rank: Super Contributor
timestamp: November 29, 2023, 11:39:33 pm
content: Enough to require almost full body armour when changing the lamps including full face shield and ear protection,seem to recall a couple of hundred times atmospheric being mention.

author: DavidAlfa
author_rank: Super Contributor
timestamp: November 29, 2023, 11:49:32 pm
content: I've heard stories of Imax operators wearing literally bomb suites when replacing them, specially dangerous when getting old.Perfect example:

author: coppercone2
author_rank: Super Contributor
timestamp: December 01, 2023, 10:37:49 pm
content: A bomb!
Workstation / lab bench - cannot find top sliding trays - Page 1
Forum section: electronics / general

author: EE-digger
author_rank: Frequent Contributor
timestamp: November 30, 2023, 05:19:21 am
content: I currently have an IAC industries workstation and know they do not make trays for their drawers. But I know that we used to have them in other workbenches. This is a sliding metal tray or organizer that just sits on the rails in your bench drawers for frequently used stuff like small pliers, drivers, occasional parts, etc.Does anyone know of a source for a bench drawer top tray? They may sit on Pendaflex rail spacings but not sure about that.
Anyone owns a Aixun T320 Soldering Station & Oscilloscope ? - Page 1
Forum section: electronics / general

author: Okto47
author_rank: Contributor
timestamp: December 22, 2023, 10:15:58 pm
content: Hello,Does anyone here owns a Aixun T320 soldering station and could measure the voltage between Tip and Ground please.Just want to buy one but saw a video where the former model - T3A has about 1V from Tip to ground (ground from same wall socket). Even drives a speaker / buzzer that way between GND & Tip.Would be nice to know if it’s the same with T320 or if it got solved.Otherwise I would buy a Trafo station but the T420 is a bit pricey as 2nd station only that I doesn’t need to change hand pieces that often at my Pace ST-115. Maybe a Aifen or some used one then.

author: JNorton
author_rank: Contributor
timestamp: December 26, 2023, 03:25:27 am
content: Perhaps this is just me but I feel this whole problem is overated. I've always unplugged anything I was servicing before I was soldering on it. I do the same thing for the boards I'm servicing. For the same reason, I disconnect my oscilloscope. Perhaps I learned these habits by servicing tube gear where 250vdc on the plates was normal. Anything I'm soldering is not connected to the ground. Just as an FYI in the 60s Ungar soldering irons were used in my electronics class. One end of the copper tip was either connected to the hot phase of 110 AC or to the neutral lead depending on how the 2-prong plug was inserted in the AC outlet. My brother discovered this and had sword fights with another student literally blowing chunks out of the copper tips. The instructor was not pleased.I'm getting ready for bed. Tomorrow I'll reconnect the ground lead on my T320 and measure the voltage from the tip to the ground for you.

author: JNorton
author_rank: Contributor
timestamp: December 26, 2023, 02:22:34 pm
content: I used the Axiun knife blade. I measured the tip to the ground using the meter. I did not notice the temperature rising when grounded. It did briefly momentarily rise after disconnecting it from the ground.

author: JNorton
author_rank: Contributor
timestamp: December 26, 2023, 02:51:39 pm
content: I thought the current reading would be helpful to you.
Sn42/Bi57/Ag1 profile with T962A reflow oven (United Engineering firmware) - Page 1
Forum section: electronics / general

author: newtekuser
author_rank: Frequent Contributor
timestamp: November 27, 2023, 12:59:56 am
content: I got the reflow temperature chart for my lead-free paste from the manufacturer (SRA), but I can't figure out if the numbers from the chart can be input into the T962A oven after modding it... the time scale I have on my oven is not as large as the one on the chart.Can I use any of the included profiles with the Unified Engineering fw instead?i.e.:"NC-31 LOW-TEMP LF" (peak at ~150C) - this seems more appropriate"AMTECH SYNTECH-LF" (peak at ~250C) - is this really for lead free?
I need some suggestions for a hot air station that will see daily use. - Page 1
Forum section: electronics / general

author: Hootis Tigglebits
author_rank: Contributor
timestamp: December 06, 2023, 04:42:39 pm
content: My employer is looking to purchase a new hot air rework station. Our current one is an old OK Industries FCR 2000 series and is rated at 300W, we mostly use it for removal of through hole down to 0603 and IC's. I would prefer one that had both large and small nozzles available like the JBC stations below (is JBC a good brand?)Below is a list of features we're looking for:-This will see daily use so it needs to be a quality product that will last for at least 5 years (our current one is over 20 years old so the longer the better.)-Adjustable air flow-Adjustable vacuum-Adjustable temperature-Optional foot pedals for blower and suction.-Many different nozzle sizes for various IC configurations available.-Nozzles must have a good tight fit on the handpiece, preferably screw on type nozzles like the one below.-Hands free nozzle removal would be nice.-Preferably one that can use a normal and small handpiece.-At least 300W-110V-Preferably under $1500.Thank you for your help and time.

author: eleguy
author_rank: Regular Contributor
timestamp: December 06, 2023, 05:15:56 pm
content: JBC is a good brand but they have had Monday versions as well. Specially their tweezer station CP-2QF was pretty problematic at the beginning. Luckily their guarantee works as this thingy was changed and fixed some times in total before we were somewhat happy.I could consider myself as some sort of JBC fanboy but still decided to give a try to the Atten ST-862D few years back. Well why?? It just was recommended by too many. Price was and is still below 170 eur at least in the shop from where I bough it. And yes, I was pretty suspicious if it is any good. However, it does the job but certainly does not look & feel like JBC stuff. I don't use it "daily" but somewhat often still. Beside the little transformer humming "feature" it had some months back (which was easy to fix) I think that if I had a need to another one I would buy the same unit again. BUT it has no vacuum, pedals or hand free nozzle changing. I have not needed such so far.