hybridfree/eevblog-posts huggingface dataset:
Need help with N2300 Trace Detector - Page 1
Forum section: electronics / general

author: qnhn90
author_rank: Contributor
timestamp: June 06, 2023, 05:35:54 am
content: Hi everybodyI have an N2300 Trace Detector for stimulant testing. But now, when the sample is put to test, the screen does not show the index as it was at the beginning.Can anyone who has done it on that machine share the treatment method?Thank you guys.
Chroma Video Pattern Generator - Page 1
Forum section: electronics / general

author: luis garcia
author_rank: Regular Contributor
timestamp: June 02, 2023, 04:17:04 pm
content: Hi,this is about Chroma Video Pattern Generator (model 2327). It was made by ChromaAte in Taiwan. It has been discontinued lately, although ChromaAte continues to build instruments.My question, for any of you that may have any experience with this tool, is about the PCMCIA slot.I own the manual but it is not a good manual. It does not explain possible errors that may happen.The problem is it does not recognize any card y place on the PCMCIA slot. I have tried a genuine PCMCIA flash memory and two CompactFlash-to-PCMCIA adapters.It is unable to format cards or read any card I put in the slot. I have tried to format with FAT and FAT32. The internal tool formating option only says; "format error".Does anyone have any experience with this generator and the pcmcia in particular?L.

author: luis garcia
author_rank: Regular Contributor
timestamp: June 05, 2023, 07:16:51 pm
content: The people at Chromaate has responded to my answer! They claim the only PCMCIA card that works is a SRAM card, not a flash card. It happens that these are pretty expensive (about 300 USD a mere 2MB card).
Good USB charger for smartphone - Page 1
Forum section: electronics / general

author: Picuino
author_rank: Super Contributor
timestamp: June 01, 2023, 03:59:12 pm
content: On Amazon there are a multitude of USB chargers for smartphones in all price categories and I imagine they are also of all possible qualities.I have seen on the internet some reviews of low quality Chinese USB chargers that do not have enough isolation between the AC part (high voltage) and the USB part (low voltage).Firefighters in my country warn about the danger of leaving a cell phone charger plugged in unattended because of the risk of it catching fire.Can anyone give me an advice on a particular brand or model of USB charger?My requirements are not great, I will settle for a quality charger that is not going to burn out if I leave it plugged in or electrocute me and deliver up to 1 Amp at 5 Volts.

author: David Hess
author_rank: Super Contributor
timestamp: June 02, 2023, 12:40:58 am
content: I stick with the major brands like Anker and UGreen. I do not know who made the PD charger for my Lenovo laptop.

author: Picuino
author_rank: Super Contributor
timestamp: June 02, 2023, 10:31:08 am
content: In fact the model I like is from Anker. I have tried their cables before and they are of good quality.

author: mahi
author_rank: Regular Contributor
timestamp: June 02, 2023, 12:09:07 pm
content: You may want to check the excellent website of forum memberHKJ:Index of tested USB power supplies/chargers

author: Picuino
author_rank: Super Contributor
timestamp: June 02, 2023, 01:45:40 pm
content: All Anker chargers are listed with a good opinion of quality and safety. I am going to buy the 24W model.Thank you very much for the website.

author: ve7xen
author_rank: Super Contributor
timestamp: June 02, 2023, 07:51:54 pm
content: +1 for Anker products, I have used them for years and they seem to be well built and engineered.However, if you are concerned about safety etc. it seems like the obvious choice would be to just buy the recommended supply from the smartphone manufacturer? It will surely meet approvals and work well with your phone. They're generally not crazy expensive, the official Google one for my phone is $3 more than the equivalent Anker on Amazon.

author: Picuino
author_rank: Super Contributor
timestamp: June 03, 2023, 10:42:35 am
content: The original Huawei charger is even cheaper than the Anker charger on Amazon, but it has only one USB socket and 5W total power.The Anker charger has two sockets of 12W each.I'm not a fan of fast charging. The Anker charger works for me to give 5V 1A and gets very little heat as it is well below its rated power.
How do you set the date/time on STC-XNVMSD? - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: June 02, 2023, 12:18:24 am
content: The STC-XNVMSD is a digital night vision monocular with camera features. Unfortunately it writes all files with the wrong "date modified" and "date created" filesystem time stamps. In Windows Explorer you can see these time stamps, and I noticed all pictures and videos it takes have the modified and created timestamps both set to 12:01AM on January 1st, 2001. I don't know how to fix this. Nothing in the paper manual says anything about this. Typically Google will find at least one other person on the net with the same problem I'm looking for a solution for. But I'm getting nothing from even Google searches regarding this issue. And it isn't mentioned in the user manual either (maybe if there was a service manual I could find out, but they don't provide those to the public). I was wondering if there's a way to put a settings text file on the SD card, that the device would then automatically read at power-on, in order to set the time.
60/40 vs 40/60 for tinning - Page 1
Forum section: electronics / general

author: pcm81
author_rank: Regular Contributor
timestamp: May 28, 2023, 12:07:33 am
content: So, i got myself a little 150W tinning pot for my irons. Didn't have any bulk solder to load it with, so made my own. Was aiming for 60/40 but screwed up and ended up with 40/60 (60% lead 40% Tin instead of 60% tin 40% lead).My question is, do i need to add tin to make it real 60/40 or can this 40/60 alloy work for tinning things like soldering iron tips and large wires?

author: Nusa
author_rank: Super Contributor
timestamp: May 28, 2023, 02:52:47 am
content: You'd have to run your solder pot about 50C hotter and wait significantly longer after dipping for the solder to solidify. And when you use the tinned wire, you'll also need more heat to solder it. So maybe.

author: pcm81
author_rank: Regular Contributor
timestamp: May 28, 2023, 03:26:10 am
content: Thanks. Leaning towards fixing the ratio to 60/40. Initial tests were with just tinning soldering iron tips, so not a huge issue for 50C temperature increase, but your point about tinned wires makes sense and is well taken.

author: coppercone2
author_rank: Super Contributor
timestamp: May 28, 2023, 03:29:39 am
content: large wires are expensive I recommend you solder them with the best solder. Just scoop some out, adjust the ratio and use the rest later. Don't be making dodgy alloys
Amiga computers' schemes in vector PDF's - here you can have them all - Page 1
Forum section: electronics / general

author: CJWarlock
author_rank: Contributor
timestamp: December 29, 2013, 01:53:41 am
content: For those of you who wanted to do some repairs or fixes to their lovelyAmiga("retro")computers- this info might be very helpful.This site -http://www.amigawiki.de/doku.php?id=de:service:schematics- has manyschemes of Amiga computers(vectorized PDFs, high quality content).And if you'd like some more Amiga related schemes, go here:http://amiga.serveftp.net/schematics.html(mostly bitmaps, scans).Additional, usefulschemes, guidesand other files can be found atDLH's Commodore Archive(really superb site - take your time to browse its content, I highly recommend that):http://www.bombjack.org/commodore/amiga/amiga-commodore/And if in any doubt aboutAmiga power supplyrelated issues - check outAmiga power supply guide V1.09:http://www.ianstedman.co.uk/Amiga/amiga_hacks/Amiga_Power_supplies/amiga_power_supplies.htmlI've just found these sites and thought I'd post them here. This is my contribution to this forum. I think the interested users will find this info most useful.

author: Macbeth
author_rank: Super Contributor
timestamp: December 29, 2013, 10:15:16 pm
content: Thank you - I will now dust down my (very expensive at the time) Rom Kernel Reference Manuals. The complete set, second edition. Some light bedtime reading. I miss you my Amiga's 500, 1200, 68050 CPU board!, hacked 3.5" to 2.5" IDE conversion, SupraFAX 14.4/28.8/33.6/56k Modem (all software upgraded over the years, fantastic Modem manufacturer!)Ahh... The good old days

author: CJWarlock
author_rank: Contributor
timestamp: December 30, 2013, 12:23:29 am
content: I've just added 2 more quality schemes' (and related stuff) sources to the first post -DLH's Commodore ArchiveandAmiga Power Supply Guide V1.09. Enjoy browsing their content.@ Macbeth: No problem, I'm glad you like it, have a good time walking down the memory lane (literally, as ROM is a memory). Congratulations on your Amiga hardware collection.

author: JoannaK
author_rank: Frequent Contributor
timestamp: December 30, 2013, 01:34:16 am
content: Real useful info. I ought to (someday?) reboot my A1000 and I may well need to do some maintenance to it. Afterall it's getting quite old by now.

author: RWAP
author_rank: Newbie
timestamp: May 26, 2023, 01:09:32 pm
content: If you need to repair your Amiga to keep it up and running, there is alwaysSellMyRetro

author: voltsandjolts
author_rank: Unknown
timestamp: May 26, 2023, 02:17:00 pm
content: Quote from: RWAP on May 26, 2023, 01:09:32 pmyou own that site, right?
SEQURE S60 USB-C Watch Soldering Iron (JBC C210) - Page 1
Forum section: electronics / general

author: nidlaX
author_rank: Frequent Contributor
timestamp: May 22, 2023, 10:48:55 pm
content: SEQURE has come out with a truly revolutionary iron that can be used like a sonic screwdriver to repair complex mechanical devices like watches.Actually the S60 looks really nice. More and more JBC compatible USB-C irons are hitting the market, this one is reasonably priced (~$50 USD with 3 clone tips included) and has a nice OLED display. Ralim has received a sample and an IronOS port is in-progress (already booting I believe).I have one on order from Aliexpress, hope to put it to use on some SMD component level repair. If the S60 is good, I would love to see them release a C245 compatible iron. The L245 exists, but it seems to have some problems.SDG Review:

author: nidlaX
author_rank: Frequent Contributor
timestamp: May 24, 2023, 10:58:43 pm
content: Just received it today. The ergonomics meet my expectations, it's a really slim handpiece, very comfortable to grip (although no rubber / silicone grip included), and very short distance from hand to tip. The most notable issue so far is that it fails to work with a variety of my USB-C PD sources at 12V. The iron turns on and 12V is detected, but it's unable to enter the working state and powers off as soon as it tries to start heating. Otherwise, it does heat at under 12V and at 12V with the included USB-A supply (build quality on that thing seems questionable).EDIT: Actually the power limit setting allows you to use power sources that can't handle the full current pulses.
Tip size vs POWER - Page 1
Forum section: electronics / general

author: pcm81
author_rank: Regular Contributor
timestamp: May 18, 2023, 10:57:00 pm
content: Recently i have been restoring couple of vintage American Beauty soldering irons. The small one is 120W and has 3/8" x6" length chisel tip; while the big one, 550W, has 1.125" by 6" chisel tip. Since i also have a 200W soldering station on order that accepts JBC tips i got wondering, what is the practical balance between power and tip size? The 550W iron is a beast and not even in the same league, but the 120W with 3/8"x6" tip is kind of comparable to large JBC tips. Naturally the T420D 200W soldering station heats the JBC tip to working temperature in 2 seconds, while it will take couple minutes for 120W American Beauty 3138 soldering iron to get up to temp; but once there who do you think run out of steam first, a 200W modern iron with JBC tip or the American Beauty 3138 (120W) as i go up cable/connector size ladder? I am almost tempted to bet on 3138 outlasting the 200W Axiun with JBC tip as well as 300W weller 650, just because of how big the heat capacity of that tip is. I'll know in couple weeks when Axiun T420D is here; until then, be my guest, venture a guess based on your experience.

author: Shock
author_rank: Super Contributor
timestamp: May 22, 2023, 02:55:50 pm
content: Those large irons are more suitable for soldering large parts, not so much electronic components on a pcb. I think you will find that the temperature adjustable stations used for electronics have a higher power to mass ratio for their size, which should lead to better performance for their intended usage.Unless that is the soldering target sinks so much heat making them ineffective. In that case you either have to add more power, more mass or a higher temp to make up the shortfall in thermal throughput, or add a form of additional preheating.Edit:There are cases were having larger soldering irons are useful. Dependent on the task however some form of heating or preheating, oven, hot air, butane torch, solder pot or resistive heating may be more practical and do a cleaner job.For more repetitive heating and removal jobs, specialized or land preparation tips, tweezers and vaacum desoldering also become more practical over standard tips. With something like bga rework even though those large iron chisels can have a wide area of contact, you want the tip to be accurately temperature adjustable on a smaller more precise tool.So the more tools and tips you have at your disposal the less you're reliant on brute force methods and it's easier to reach into your tip rack and insert a 30mm blade tip (for example) than pull a large iron out of the draw and plug it into the power.

author: donlisms
author_rank: Frequent Contributor
timestamp: May 24, 2023, 10:11:28 am
content: If you would like to understand thermal transfer better, which is kinda at the core of all this, there are lots of resources, of course; I like Michel van Biezen on YouTube. Simple and straight ahead; these things help me understand what's really going on with that heat.
What size desoldering nozzle do I need? - Page 1
Forum section: electronics / general

author: theaustindixon
author_rank: Contributor
timestamp: April 28, 2023, 12:32:50 am
content: I recently bought a second-hand Hakko FR-300 desoldering gun, and it only came with one nozzle (that is way too big for IC boards). I can't afford a full set of nozzles right now, and I need to desolder some chips with super small solder joints. I don't have a clue what size nozzle to order. Advice?

author: tooki
author_rank: Super Contributor
timestamp: April 28, 2023, 01:11:17 pm
content: Watch the following video at 9:45-10:05. It’s from another brand, but the principles are identical. This video is also the best tutorial on proper vacuum desoldering technique I have ever found, so I recommend watching it from 13:33 to 22:20. (Or watch the entire video and fast-forward through the parts that are specific to that tool model.)

author: theaustindixon
author_rank: Contributor
timestamp: April 28, 2023, 02:19:22 pm
content: Thanks, that's very helpful.

author: armandine2
author_rank: Frequent Contributor
timestamp: May 16, 2023, 02:29:30 pm
content: I was making a real mess of de-soldering components last night (with my Hakko FR-301) - hadn't realized I was way over size, changed to the N61-12 nozzle and they were falling out. I must add a photo of thecarnagedifference.[edited to show picture of difference with a 1.0mm nozzle (2 on the r.h.s.) and 1.3mm (l.h.s.)][edited to add pic of component removed with oversize nozzle - not the header above]

author: tooki
author_rank: Super Contributor
timestamp: May 18, 2023, 09:23:37 am
content: Can you post a much sharper picture?

author: armandine2
author_rank: Frequent Contributor
timestamp: May 18, 2023, 11:44:17 am
content: Not in the near future,.. but if I get the BRESSER MIKROCULAR FULL HD EYEPIECE CAMERA for my BRESSER Biorit ICD CS Stereo Microscope that might changemy macro photography talent/equipment is in need of improvement

author: chilternview
author_rank: Frequent Contributor
timestamp: May 18, 2023, 12:16:12 pm
content: I use either 1mm or 0.8mm tips on my FR-301. The smaller are better for DIP ICs, the larger for through hole components. Haven't needed anything larger than 1mm.

author: armandine2
author_rank: Frequent Contributor
timestamp: May 19, 2023, 08:21:14 am
content: better pictures (notmuchbetter)

author: tkamiya
author_rank: Super Contributor
timestamp: May 21, 2023, 05:10:01 pm
content: I have two FR301s. One with default tip and another with 0.8mm. For ICs, I find 0.8mm long with slightly longer shank work the best for me. Less chance of burning near by parts. On the other hand, removing larger components, even 1.0mm can be too small. It's all depends what you work with the most.

author: armandine2
author_rank: Frequent Contributor
timestamp: May 22, 2023, 06:43:48 am
content: Mea culpachecking the nozzle it was actually the N61-08 which was too large and the N61-12 is only 0.2mm less outside diameter.I'll now definitely get a 0.8mm nozzle (N61-11) and a S/S type 1.0mm (N61-05).
Electronic CD/DVD Organizer problem - Page 1
Forum section: electronics / general

author: ThermallyFrigid
author_rank: Frequent Contributor
timestamp: May 16, 2023, 08:56:17 pm
content: G'day!Today I'm trying to figure out a problem I am having with my CenturyCD CD/DVD Organizer Carousel which I use to organize all my Cd's and DVD's.I have 3 units stacked and they have contact connections on top of each unit and at the bottom of each unit with pins and sockets so they can communicate and transfer power.The units are connected via USB to a PC which runs Library Software to keep track of each CD's location.They are powered by a 9V, 1A power supply but I have attached a separate 9V 2A power supply to each unit so I have 3 units and 3 power supplies to try and make sure they get adequate current.I was considering trying a 12v power supply to see if an increase in voltage might help.The problem is that when I run a lengthy operation such as empty all slots (there are 100 slots in each of the 3 units for a total of 300 Cd capacity) the units seem to fade. what I mean by that is with each CD ejected, the device seems to get slower and slower until finally it stalls and fails to complete the operation on the top unit. Sometimes it can complete the operation on the first two units. I can usually get as far as Cd number 35 or so on the top unit but never to 100. I thought about swapping the top unit to the bottom just to see if that helps.I tried cleaning the pins and sockets and as mentioned, a separate power supply for each unit but the problem persists.I'm not sure where to begin searching for the answer but maybe someone here has dealt with a similar situation and could offer some advice?

author: ThermallyFrigid
author_rank: Frequent Contributor
timestamp: May 20, 2023, 02:51:04 am
content: In case someone comes along later with this issue......I'm going to try a higher quality USB cable.
Quick hot air nozzle adapter in the US - Page 1
Forum section: electronics / general

author: jcbottorff
author_rank: Newbie
timestamp: May 16, 2023, 07:28:09 pm
content: Hi,I own a Quick hot air soldering tool and for like two years have been hunting for a source of the nozzle adapter. This allows using cheap generic nozzles. I'm very pleased to see AdaFruit has these in stock right now, it's listed as a Quick NK-850 and is $10. I also want to thank AdaFruit for being responsive to my product suggestion! My NK-850 is ordered, it was a LONG hunt.Jan

author: Faranight
author_rank: Unknown
timestamp: May 17, 2023, 07:03:24 pm
content: I have a Quick 861DW hot air station for SMD work. I think I ordered it onEleshop(EU/NL) a while ago, and it came with some factory nozzles, but not a lot. So, I decided to order some cheap ones on Aliexpress, namely, the ones angled at 45 degrees. Bad idea. The outer nozzle rings ended up being too small, and they would just fall out of the handle or they did barely stick in there. If I had upped the air flow, then it would have probably blown out the nozzle. Sigh. Ended up re-ordering originals from Eleshop, and they fit perfectly tight.

author: kripton2035
author_rank: Super Contributor
timestamp: May 17, 2023, 09:09:20 pm
content: https://eleshop.fr/quick-nk-850-adapter-nozzle.html
Is there a reflective LCD VGA/HDMI/DVi display? - Page 1
Forum section: electronics / general

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: May 13, 2023, 10:49:01 am
content: There is the ""new technology sun vision using brand new reflective technology never seen before in lcds"" overpriced crap that costs 1.5kBut im wondering if there was a display like this made long ago or something, preferably above 800x600, could be monochrome.Or is there maybe another way to get a monitor that works fine in sunlite.I am thinking of just getting an old lcd, and replacing the difuser+backlight with a reflective surface, but idk how usable that would be

author: AndyBeez
author_rank: Frequent Contributor
timestamp: May 13, 2023, 12:19:10 pm
content: What is your application/deployment for this display?There is always the daylight readable 'paperwhite' Kindle type display. Not easy to jailbreak, but these can be used as a static status display. And very low power too

author: jpanhalt
author_rank: Super Contributor
timestamp: May 13, 2023, 12:55:26 pm
content: There may be purely reflective LCD's, but why? All of the displays I use are "transflective," which means they can be read without a backlight in decent lighting (e.g., ordinary dim household lighting), and in the dark, they can utilize a backlight (https://en.wikipedia.org/wiki/Transflective_liquid-crystal_display). In fact, I include in code dimming or on/off for the backlight to save battery-only operating time. A simple mosfet or BJT can do the switching. I use an N-channel mosfet.Attached is a snippet of the circuit I have used.
Vidicon TV studio camera not working... or hybernating. - Page 1
Forum section: electronics / general

author: left_curve
author_rank: Newbie
timestamp: May 09, 2023, 08:18:26 pm
content: So I picked up a studio tv camera (JVC CH-1800U) and the 3 vidicon heaters aren't glowing. The test signal works flawlessly and the color adjusts seem to be working fine, but I'm just stumped on if it is broken or I'm doing something wrong. If anyone has some advice please send it my way! Thank you. Sorry if I formatted this bad I am new here.
Aircraft avionics - cockpit LCD display / MFD reverse engineering - Page 1
Forum section: electronics / general

author: adriansmith31
author_rank: Contributor
timestamp: May 07, 2023, 07:30:50 pm
content: I have acquired a MFD from a RAF Nimrod MRA4 which is a LCD unit 9" square with believed resolution of 768x768. It runs off 28V DC and I have successfully managed to power this thing on but at startup it displays a large "T" and then after a period of time displays a green diagonal line which in avionics speak means no input signal or data.I've done a video of the power up sequence and teardown but I'm wondering if there's any avionics engineers that are familiar with similar units or could give any sort of idea what video input this needs. There are three coax connectors on the back which eventually go to the video processing board where they are fed into a triple channel video amplifier and then into a ADC. It looks like the unit takes 3 video inputs (9 coax connectors in total) but only three are fitted.There's an absence of MILSTD and ARINC transceivers which after doing the teardown I believe this is purely an analog display and it doesn't generate any symbology within the unit itself like the MFD's used in commercial aircraft. It's been suggested I try component video or 768x768 @ 50Hz sync on green but I don't have any way to generate this signal.Video of it powering up is here if anyone is interestedhttps://youtu.be/ugQ7-Vc6U1g
Any options on AiXun P3208? - Page 1
Forum section: electronics / general

author: heygeorge
author_rank: Contributor
timestamp: April 22, 2023, 07:51:46 am
content: There are no in-depth reviews of it yet. The official website description is like this：P3208 320W Smart Regulated Power Supply 32V/8A• 320W ， support unlimited function expansion• Built-in bluetooth WiFi chip, remote software upgrade by iCloud• Type-A/Type-C fast charge output, support PD/QC fast charge protocols• 60W maximum charging power for single channel, 30W maximum charging power for dual channel• Including iPhone 6-14 battery protocols•Customized three-channel current and voltage shortcut settingHas anyone already received this unit and reviewed it? Share something about ithttps://www.aixuntech.com/product/p3208-320w-smart-regulated-power-supply-32v8a-one-key-boot-power-box-/

author: mastershake
author_rank: Frequent Contributor
timestamp: April 26, 2023, 03:09:57 am
content: i have 2 that should be here soon. it left china on the 21st so i should see it in about a week ish time. once in hand i can go over more questions unless someone here already has one

author: mastershake
author_rank: Frequent Contributor
timestamp: May 01, 2023, 10:04:08 pm
content: one arrived today ill try to get it on the bench tonight or tomm and see how it goes.

author: heygeorge
author_rank: Contributor
timestamp: May 05, 2023, 08:43:17 am
content: Awesome!
EEEEE strip boxes with components - Page 1
Forum section: electronics / general

author: RAPo
author_rank: Super Contributor
timestamp: May 16, 2023, 06:22:24 pm
content: I discovered a very nice way to keep your components handy on the bench.EEEEE shop sells components in what I call strip boxes.But why o why for different sizes??The boxes at the top are real strip boxes, but I prefer the box at the bottom.It has a description on the backside, just like a book.
Vintage "Electro-Cal" 10 millionths measuring device. - Page 1
Forum section: electronics / general

author: .RC.
author_rank: Frequent Contributor
timestamp: May 05, 2023, 08:21:42 am
content: I have had this here for awhile, thought I might share some pictures if anyone is interested.It is a dial test indicator that can measure to the 10 millionths of an inch range. ( 0.000254 mm) It is an unused device, supposedly a person over here was wanting to become a dealer for the Taper Micrometer Corp and was sent various devices that manufacturer sold, but I guess it went no where. (you can find taper micrometers on ebay still and they sell for high $$, they are not electronic) The instructions were mostly glued together to the device and box when I got it, but one diagram sheet has 1963 dated on it.The indicator has a ruby tip and the bit of the instructions I can read indicate the main uses it was designed for was for checking tolerances of gauge blocks by using it as a comparator. You would put the indicator in a special stand. Put your known reference standard gauge block under the indicator. Then slip the block being tested under the gauge and measure the variance from the standard.It was powered by mercury batteries, I guess because they held up their voltage well as they were discharged. I had powered it by 5V.Unfortunately the dial which is essentially a 100 microamp dial did not work so I bodged in an external russian made 100uA meter I got off ebay.I had dreams of converting it to a digital display, but whether that will happen I do not know. My current skill set is not capable of doing that.
Aixun T3B - Page 1
Forum section: electronics / general

author: damanloox
author_rank: Contributor
timestamp: February 26, 2022, 05:28:12 pm
content: Does anybody know if genuine JBC T210 handle works (without any mods) with T3B...?

author: Xoff
author_rank: Contributor
timestamp: May 01, 2023, 08:33:53 pm
content: No, it will not work. T3B uses different connection pin-outs.
AMScope SM-4NTPX-3PL camera port question - Page 1
Forum section: electronics / general

author: jusanother
author_rank: Contributor
timestamp: April 22, 2023, 05:29:28 pm
content: Hi,I have just bought one of thesehttps://amscope.co.uk/products/amscope-3-5x-45x-simul-focal-stereo-lockable-zoom-microscope-dual-arm-boom-standas many others have done. Overall it seems very nice but on looking through the camera port with my human eyes something is partly occluding the view, it appears to be a prism. I wonder if other owners of these scopes could check and see if this is normal ?I have tried to capture it on camera but it's not the easiest thing to capture.I suspect/hope when coupling a camera the FOV will cut the occlusion out, I'm still waiting for the adapter to arrive so can't check immediately. Still seems a bit odd however.The two pictures are from the exact same perspective. The first with the object illuminated, the second with the view into the camera port iluminated.Thanks.

author: thm_w
author_rank: Super Contributor
timestamp: April 25, 2023, 01:21:53 am
content: There is a chrome handle on the side of the trinocular port. Pull that in and out and you'll see the prism move in and out of the view path.edit: corrected below by ygi as its simul-focal, no handle.

author: jusanother
author_rank: Contributor
timestamp: April 26, 2023, 11:00:57 pm
content: No sign of a chome handle on my scope, do you have a picture perhaps ?

author: ygi
author_rank: Regular Contributor
timestamp: April 27, 2023, 08:50:13 am
content: Basically that handle is a selector used to move a mirror to pick which way the light from the prism is directed to - either unobstructed straight to the eyepiece OR intercepted by the mirror and to the camera port. You can't have both in that case. On higher end models, there's an additional prism dedicated to the camera port so you can see from all 3 viewports at all times and there's no selector. I believe yours is one such models but I might be wrong.Now, the fact that the port looks partially obstructed to the naked eye likely doesn't matter. Actually, what you see is in the camera port is a small mirror pointing at a prism that redirects light through the left optical pathway. Anyway, it's likely the camera doesn't see such a wide field because of its focal distance and will be fine as long as it has direct line of sight with part of the prism at the correct angle.

author: jusanother
author_rank: Contributor
timestamp: April 29, 2023, 01:16:25 pm
content: Two hours searching last weekend and I found no mention of this problem, 30 seconds searching today and I found another user on this forum mentioning this issuehttps://www.eevblog.com/forum/reviews/advice-on-trinocular-port-camera-is-this-normal-what-adaptorscamera/ygi you are correct on both counts 1) my scope can simultaneously use all three viewports 2) The user jfiresto in the linked thread suggested using an eyepiece over the camera port to check the field of view, when you do this the obstruction can't been seen.Thanks all.
ADAM-4068 control relay alternatives?  - Page 1
Forum section: electronics / general

author: xal3xhx
author_rank: Newbie
timestamp: April 21, 2023, 01:25:46 pm
content: Im currently working on a project that needs lots of relay channels to be switched 24 channels to be exact, however they almost all need to be single pole double throw. i have used the ADAM-4068 8channel relay before but only 4 of the 8 are double throw. anyone know any industrial control relays i should take a look at? ideally a simple RS232 serial control
TDK S6358PA CFL lCD lighting inverter connections - Page 1
Forum section: electronics / general

author: G0GCD
author_rank: Newbie
timestamp: March 25, 2023, 07:48:40 pm
content: I've got one of these in an Anritsu MT8801C that I'm refurbishing. It's the inverter for driving the fluorescent tube backlight for a Sharp 8.4in LCD. I'm replacing the CFL with LEDs.The output from the board is obvious, however the input has 5 wires leading into it, one marked in red. I am expecting there to be a two wire DC feed. What are the other three for?I can't find a datasheet or application note anywhere.. any help would be gratefully received.ThanksJohn

author: MathWizard
author_rank: Super Contributor
timestamp: April 20, 2023, 10:13:04 pm
content: So you mean you have the PCB like this ?https://www.ebay.com/itm/324861523745It looks like some boost, switching regulator. What's the label on the 8-pin chip ? That will be the controller, and the main circuit will probably be just like whatever's in the datasheet.If you have a DMM, with the device un-powered, it should be pretty easy to trace back from the wires to where ever. Or post a picture on here, someone will know the layout.There's probably a logic level on/off, maybe an output level adjustment, and something else for 3 unknown's
EBL  1.5V AA Lithium ion Batteries (micro USB chargable) - Page 1
Forum section: electronics / general

author: mwb1100
author_rank: Frequent Contributor
timestamp: April 20, 2023, 01:37:43 am
content: A while back I was reading some thread about alkaline batteries spewing the juice in equipment that's stored for somewhat extended periods. One of the things mentioned in that thread was that lithium ion batteries didn't have that behavior.Another while back, I acquired an eBay Fluke 189 that was a "parts only" good price which turned out to only need a bunch of battery corrosion cleaned up. Works fine now. To avoid having another corrosion incident, I decided to get a set of these batteries:-EBL 1.5V AA Lithium ion BatteriesOne interesting thing about them is that they have micro USB sockets to charge them (the set also comes with a USB-A to 4 USB micro B cable assembly).I was just wondering if anyone knew details about these things. They're not cheap - about $24 for a set of 4 today (which is considerably cheaper than when I got them back in November). They're working well for the 189.- the cells have 1.5V when fully charged; they have some sort of circuitry inside to regulate the 1.5V from the LIon's natural voltage- they seem to stay at 1.5V until they drop off a cliff to 0VA set of 4 freshly charged in the 189 with APO disabled kept the meter running for 144+ hours (it was measuring a 4.7K resistor during that time). I'm not sure exactly when it died, but within 8 hours of the 144m which is when I last witnessed it still running. When I checked the 4 batteries, two were at 0V and the other 2 were at 1.5V.I haven't timed how long they take to charge (I just leave them on the charger overnight).I know very little about battery chemistry, so I'm just curious for comments - in particular are they maybe going to do something worse than an alkaline leak?

author: thm_w
author_rank: Super Contributor
timestamp: April 20, 2023, 09:42:26 pm
content: Yes there is a buck regulator inside, as well as the USB charging circuitry.They theoretically could catch fire, being li-ion. Although with cells this small they just tend to puff up when they die.
Rebuilding ZD 915 broken guns - Page 1
Forum section: electronics / general

author: iwate
author_rank: Newbie
timestamp: April 17, 2023, 04:20:10 pm
content: I have a ZD 915 desoldering station at home, i use it for several repair jobs. Mine came with DC suction pump and buck circuit from factory.I had been using the factory supplied gun up to 2019 i think, where the heater broke and i had to replace by one wich lasted one year only. I ended recapping the power supply , fixing some wires and after a new gun, the third, it works well.Now, i would like to rebuild the other two broken guns i have. As i have to replace the heating element on both, i would like to ask if someone could tell me how can i tell the heating element from the temperature sensor since it has 4 white wires coming from it.My gun has a cord wich look like this:White and White= Trigger;Red and Red= Heater;Blue-Black-Yellow= Sensor; (black came off and heating element has an unconnected white, i'm not fully sure here).The question i would like to ask is; once i have the new heaters, how can i tell wich wire is wich? Can i tell by measuring ohms using a multimeter?Should this be the manner of doing this repair, does someone know the values?

author: Stanko55
author_rank: Newbie
timestamp: April 18, 2023, 07:03:28 pm
content: I had simmilar problem with mine CT859 which I wrote about on this forum.You probably(99%) have Ktype thermocuple sensor in that.This type of sensor creates small voltage in (mV) when subjected to heat.What I have done is,used the lighter to heat the front of the heating element and measured voltage on connections.And you should see voltage rising and slowly falling when you remove lighter.But also watch for + and -,digital multimeter will tellyou which is which.Heater also has higher resistance.You can also dismantle and repair broken heating elements as I did in mine,since you have spare.
(SOLVED)CT-859, rare desoldering station, hack attempt.. - Page 1
Forum section: electronics / general

author: Stanko55
author_rank: Newbie
timestamp: September 19, 2022, 12:19:53 pm
content: Hi everyone,Recently I bought ct-859 desoledering station, second hand.Station came with broken gun and heating element...Since it was cheap and believing it is going to be easy fix,I bought it.Also I tought it uses same parts as other chinese generic stations.But I was wrong hahaha.It is almost completely different than others.This 6kg "door holder"🤣 uses 220V AC vacuum pump with 2 membranes and most unfortunately some wierd heating element of 26/27V and probably 50W, switched on/off by triac.Replacement heating element is nowhere to be found on internet,and buying complete gun because of cost is not option,for now...But,there is hope! With station came replacement heating element for stations like ZD985/915 which has value of 24V and 80W.My first idea is very crude and simple ,and that is to replace transformer with more powerful one (this one is 55W) and on the hand gun connector put some resistor to drop voltage for heating element.If anybody has better idea or suggestions how can I adress this problem I would be greateful.Cheers!

author: macboy
author_rank: Super Contributor
timestamp: September 20, 2022, 02:35:20 pm
content: Hmmm....Immediately I thought that the base station looked similar to a Hakko 470/474, and that the gun looked familiar too. After comparing some pics, the gun looks identical to the gun used for the 474. Its gun part number is Hakko 809. The heater is nominal 24V at 50W. I previously had a 470 (same gun) and also thought that the ZD accessories might work, especially the cheaper tips, so I tried some. They are just a little different in size, so won't work. But since yours looks identical to the Hakko gun, you may have more luck with those accessories and parts.

author: TheBay
author_rank: Unknown
timestamp: September 26, 2022, 10:20:03 pm
content: I've got a Quick 201B and the gun is a decent clone of a Hakko 809. It's far superior to the ZD(Zhongdi) and Aoyue desoldering stations/guns.It might be worth looking at the replacement gun/parts listed for the Quick 201B as well?

author: Stanko55
author_rank: Newbie
timestamp: April 18, 2023, 06:50:25 pm
content: Well,after some thinkering, I decided to dismantle original heater,carefully cutting the ceramics.It is wire wound classic heater with temp probe.Heater wire was broken inside,I conected it again with crimping sleeve,and it works.It is good to go in service.And in the future,if new replacement heater wouldnt be available,by looking at the construction of the dismantled heater,it will be possible make completly new one with some resistance wire and fire clay(only that part is tricky).Zero money spend,sometimes, it is worth risking if you have nothing to lose..
uCurrent Burden Voltage - Page 1
Forum section: electronics / general

author: daveyk
author_rank: Frequent Contributor
timestamp: April 13, 2023, 05:55:29 pm
content: In Dave's specs, the uCurrent Burden Voltage is approximately 20uV (.020ma???). I Assume the output voltage does NOT compensate for the burden voltage?I ask because I set up a 1volt source (.9996volts as measured by a NIST certified Agilent 34401A) and a Precision 1000 standard (measuring 1002 ohms by same 34401A - although I did not do it four wire, just nulled the leads out). That would calculate to .000976 volts out of the uCurrent. I am getting an average over 30 readings of .0009895 volts. That is an error of .0000216 volts, which may be the burden voltage?If that is the case, I will add a burden voltage parameter to the .ini file of the program I use to correct the current draw data of instruments when they are on and when they are off (can be a big problem).With burden compensation, the error is .00000165volts, which is pretty damn good.

author: thm_w
author_rank: Super Contributor
timestamp: April 13, 2023, 10:13:41 pm
content: The burden voltage depends on the range. You can read the spec here:https://eevblog.com/files/uCurrentArticle.pdfQuoteThe output voltage is directly related to the current passing through the sense resistor, that is it.You can see in the schematic the sense resistor is 10k, 10R, or 0R01.
Anyone by chance have JBC C245-962 or C245-963 cartridge? - Page 1
Forum section: electronics / general

author: FPdesign
author_rank: Contributor
timestamp: April 09, 2023, 08:47:41 am
content: If you do have one of these; C245-962 and/or C245-963, could you be so kind and post a picture of the cartridge. And if both a pic next to each other? Would be much appreciated!Need a Bent Chisel Cartridge, both aren't really perfect for what I'm after. C245-962 seems about right from tip size and C245-963 the length to solder from the side, from what I can see from the graphics and data sheet. But a picture would be easier to decide. No one locally has stock or any photos online.

author: thm_w
author_rank: Super Contributor
timestamp: April 10, 2023, 09:58:04 pm
content: The graphics:https://www.jbctools.com/c245962-chisel-bent-cartridge-12-x-07-product-375.htmlhttps://www.jbctools.com/c245963-chisel-bent-cartridge-18-x-08-product-377.html963 has a larger wetting surface and wider tip (1.8mm vs 1.2mm)963 also extends out a bit furtherWhat is the intended use case?

author: FPdesign
author_rank: Contributor
timestamp: April 12, 2023, 07:31:36 am
content: Thanks, have been looking at those and the measurements already but I'd rather see a proper photo..Need them for soldering difficult/tight places to get to, so can solder in an angle both either tip or front side of the cartridge.. just gives me more options than with my other cartridges when needed..Wish the 962 was bit less angled and longer front side solder area.. bit of a mix of the two mentioned.. but maybe it would be just enough.. bit hard to tell from a graphic which of the two would suit better..
klein tools mm200 meter problem - Page 1
Forum section: electronics / general

author: Joust
author_rank: Contributor
timestamp: April 08, 2023, 02:09:57 pm
content: dredging up old topic ofhttps://www.eevblog.com/forum/reviews/klein-tools-mm200-multimeter/msg87115/#msg87115a most excellent post from @fenderbendermy problem is a friend asked me to look at his mm200 which reads erroneous mV but more importantly it reads 4.5K on ohms when there are even no leads attached.I am loath to start fiddling with pots not knowing what they do but its of severely limited use as it is now.ohms works but reads as if the 4.5K is in parallel with the DUT.
Zd 915 vs zd8915 desoldering station. - Page 1
Forum section: electronics / general

author: gabri.peic
author_rank: Regular Contributor
timestamp: July 11, 2022, 05:05:14 pm
content: Hi everyone.I am buying a desoldering station and since i cant justify buying a quality hakko unit i am going for cheap chinesium unit.The only problem is i cannot decide which one to get...My options for now are zd915 (115 €) or zd8915 (81€)I did some reading and some people complain about zd8915 having a thinner barrel and less thermal mass...So which one should i get ?Also i am open to any other suggestions in the same price range...Thanks in advance.

author: ace1903
author_rank: Regular Contributor
timestamp: July 12, 2022, 07:33:12 am
content: I own ZD8915 and can confirm that is clogging all the time due to long thin barrel. And when it clogs you need second iron to heat the thin end in order to unclog it.I have got burns multiple times.There is new improved version but problem is if you are ordering from net you will not be able to know which version you will get.So my advice is to stay away from ZD8915 unless you can see yourself that you will get new improved version.

author: gabri.peic
author_rank: Regular Contributor
timestamp: July 12, 2022, 03:46:56 pm
content: Thanks for the info.Thats exactly why i asked .Now i know what i am going to buy and what i am not going to buy...

author: Beau Geste
author_rank: Newbie
timestamp: April 05, 2023, 04:23:54 am
content: The clogging of the desoldering gun barrel is a false problem. To avoid this, just keep the trigger pressed for a few more seconds. Not only that, but it's also a very easy solution: just bring the temperature to the maximum and unclog it with the needles supplied. Lastly, all the tools must undergo maintenance. It is good practice to pass the needle through the barrel at the end of each work session and clean the suction pond tank and replace the filters when necessary. Nothing extraordinary. The device if well maintained has nothing to envy to much more expensive devices.
Replacement element for Weller HAP-200 hot air pencil  - Page 1
Forum section: electronics / general

author: dorkshoei
author_rank: Frequent Contributor
timestamp: March 26, 2023, 06:48:49 am
content: I managed to drop something on my HAP-200 and break the metal tip containing the element. I need to source a replacement metal tip and element.https://www.weller-tools.com/us/en/industrial-soldering/products/soldering-irons/hap-200According to the parts diagram on the above page (attached) the element is 5 87 377 01. The Weller part numbers you order are always a bit different from what are shown on the parts diagram, I believe the orderable part is T0058737701NSearching I get only 3 hits, all in Europe. Such ashttps://www.matedex.be/en/products/art-59052/heating-element-hgp-hap.htmlLast time I ran into this I emailed Weller USA and they told me the part was not available. I'm not sure if these parts are actually orderable in Europe?I really don't want to buy a whole new HAP-200 pencil.Thanks

author: dorkshoei
author_rank: Frequent Contributor
timestamp: April 04, 2023, 03:54:58 pm
content: Okay, so it turns out the parts diagram above is for the HAP1. Weller just incorrectly put it onto their US page for the HAP200. Apparently according to the European distributor such errors are common.The element T0058737701N (for the HAP1) can be ordered but only from Europe. In the USA your only option is to send it back to Apex who offers a flat rate exchange for 25% less than MSRP or about the same price as you can buy a new one onlineThe Euro site has the correct parts diagram for the HAP200 and the element is "5 87 617 43" but T0058761743N is not orderable anywhere.Lesson learned? Avoid Apex Tools. Buy Hakko.