hybridfree/eevblog-posts huggingface dataset:
SK80H / GXJA0673 buck-boost DC-DC adjustable power supply - Page 1
Forum section: electronics / general

author: Razvan_N
author_rank: Contributor
timestamp: March 14, 2024, 08:28:51 am
content: Let's discuss this inexpensive power supply module from Ali.XY-SK80H / GXJA0673 / D13-13-B-06 is an adjustable buck-boost DC-DC converter that goes from 0.6 to 36.5 V and 5.2 amps, from an input ranging between 6 and 36 volts.I'm using it as a field power supply, mounted on a 18 V power tool battery. It works great, it is very practical but it lacks a proper manual. There are some floating around but for an older version of it.Besides the constant voltage / current adjustments, one can set a low input voltage protection (LVP, preventing overdischarge of the battery), overvoltage protection (OVP, handy in case you want to prevent accidentally adjusting too high a voltage), overcurrent protection (OCP), over-power protection (OPP, threshold is in Watts), over-capacity (OAH, Ah, for battery charging), over-energy protection (OPH, Wh), timer (OHP) and startup settings (whether or not to start in the on or off state, and whether to start in constant voltage or constant current state).However, on one unit I get an error saying OEP (?!) as soon as I connect even the tiniest load to it (e.g. a voltmeter). I suspected having to do with some over-energy protection that is set much too low, but this one is actually called OPH and it is disabled. I could not find anything about this OEP condition or a method to reset the thing to factory settings.Does anyone have more experience with this module?

author: thm_w
author_rank: Super Contributor
timestamp: March 14, 2024, 09:05:14 pm
content: What voltage are you supplying?QuoteQuoteMaybe some FET is blown?So you can output a voltage all the way up to 36V and it will say 0A on the display?

author: Razvan_N
author_rank: Contributor
timestamp: March 14, 2024, 09:42:12 pm
content: Yes, I can adjust voltage up to 36.5 V. Where did you find the instructions quoted?

author: thm_w
author_rank: Super Contributor
timestamp: March 14, 2024, 10:24:26 pm
content: Google OEP buck boost and you'll find other similar devices or rebrands.Try connecting a resistor as a load, then turning it on?

author: Razvan_N
author_rank: Contributor
timestamp: March 23, 2024, 09:49:12 pm
content: The Aliexpress seller agreed to send me a replacement on a future order (which I already made).Still, I'm interested to fix this if possible, so please write if someone has experience in troubleshooting this model.
best portable work lights? - Page 1
Forum section: electronics / general

author: coppercone2
author_rank: Super Contributor
timestamp: April 09, 2024, 05:07:18 am
content: What are the best work lights for benchtop extra illumination?Honestly if you have the room its almost always better then trying to setup crazy lights in your room because face it, the chassis is not going to cooperate, and neither will anything but the flattest of PCB.What are the best battery powered portable worklights ? Hopefully some sort of corn-cob light

author: Berni
author_rank: Super Contributor
timestamp: April 09, 2024, 05:21:40 am
content: I have a microscope light up on a shelf above the bench. It has a pair of gossenecks carrying a very focused LED light at the end. It is really useful for when you want to get a lot of light onto your area of interest without having to light up the whole room ridiculously bright. The optics on those LEDs focus the light into a tight beam so you can get a nice small bright spot from quite a large distance away (so the light doesn't get in the way while you work).Next one is just a simple single 18650 cell powered flashlight, good for just waving around and shining deep into some deep dark spots.Another is a cheep USB rechargeable work light that has the LEDs mounted on a separate flip out flap that stays at any angle, this one is useful when working down under desks or other tight spots where you can't easily hold your light. So you can set it down on any flat surface and angle the flat LED panel to put light in the direction you need.Head strap mounted LED lights are also an option, but i haven't really been using those very much.

author: coppercone2
author_rank: Super Contributor
timestamp: April 09, 2024, 06:05:12 am
content: I am thinking of a COB light on a goose neck. I see they sell them for BBQ. It might just need a partial cover to restrict the light to a narrower angle.
Tektronix 2213 versus 2213A: differences?  And looking for help fixing it. - Page 1
Forum section: electronics / general

author: wkb
author_rank: Super Contributor
timestamp: November 27, 2011, 02:59:33 pm
content: Folks,I wanted to hand down a Tek 2213A scope to a friend of mine (one does not need 3 scopes, right?) only to discover that the horizontal deflection seems to have gone haywireI have about 3.5 div of horizontal deflection, which I can center on the screen by turning the horizontal position all the way clockwise.Vertical amplifiers appear just fine, and the timebase as such also works. As does triggering, focus, etc etc. PSU voltages appearto be within spec, and do not appear to carry 'junk' (measured with my Tek 2465).I do own the 2213 service manual, but not the one for the 2213A model. Does anyone on this forum have a copy of the 2213A servicemanual that they can share? What are the differences between the 2213 and the 2213A model anyway?While digging in its guts I discovered that some repairs had already been done, like replacing some of the focus resistors. Apparantly a common problem with the 2213. In the meantime another of these 510k resistors had gone south, so I replaced that in the process.Obviously that did not help the original problemSuggestions, insights etc are most welcome.Wilko

author: Unknown
author_rank: Unknown
timestamp: November 27, 2011, 03:12:07 pm
content: Try searching the TekScopes Yahoo! group. A search for 2213a returns about 200 hits. I'm not aware of a freely available copy of the 2213A. There is one available for $5 fromArtek Media.

author: wkb
author_rank: Super Contributor
timestamp: December 02, 2011, 01:44:41 pm
content: Quote from: alm on November 27, 2011, 03:12:07 pmThanks for the pointer. I sent Artek email on the 28th, but no response whatsoever until now. Any idea how responsive they typically are?

author: wkb
author_rank: Super Contributor
timestamp: December 02, 2011, 02:27:22 pm
content: For the record: just got a blindingly fast response after sending another email to ArtekMedia. Seems the gods of the Internet haddemolished my first email.Back to troubleshooting...

author: Unknown
author_rank: Unknown
timestamp: December 02, 2011, 09:33:32 pm
content: Glad you got the manual. For the record, responsiveness is usually excellent, I've received apologies because I had to wait a day for a response.

author: wkb
author_rank: Super Contributor
timestamp: December 02, 2011, 09:44:54 pm
content: Quote from: alm on December 02, 2011, 09:33:32 pmYes, I fully agree, Dave (of Artek media, mind you) is also a very nice gentleman.

author: BTO
author_rank: Frequent Contributor
timestamp: March 20, 2024, 10:47:36 pm
content: Quote from: wkb on November 27, 2011, 02:59:33 pmRE " (one does not need 3 scopes, right?)"where would you get such a ridiculous idea like that from ?
12VDC  to 220VAC inverter schematic? - Page 1
Forum section: electronics / general

author: Faringdon
author_rank: Super Contributor
timestamp: March 16, 2024, 12:15:02 pm
content: Hi,Does anybody please have a schem for this inverter (this type of inverter)Ie, not the type that have a bridge feeding the coil of a 50Hz transformer....want it all high frequency switching type...No 50Hz iron core transformers in there.https://www.temu.com/ul/kuiper/un9.html?subj=coupon-un&_bg_fs=1&_p_jump_id=895&_x_vst_scene=adg&goods_id=601099541249956&sku_id=17592320644637&adg_ctx=a-4b8e35a9~c-47aa11c7~f-1fb43bb7&_x_ads_sub_channel=shopping&_p_rfs=1&_x_ns_prz_type=-1&_x_ns_sku_id=17592320644637&mrk_rec=1&_x_ads_channel=google&_x_gmc_account=710731536&_x_login_type=Google&_x_ads_account=6950480996&_x_ads_set=20175373674&_x_ads_id=155116377291&_x_ads_creative_id=659564837945&_x_ns_source=g&_x_ns_gclid=Cj0KCQjwhtWvBhD9ARIsAOP0GoiKOfb0h4-MthA-GPkgmcVnZsyNzmmD4ELydZeFgWxXIrXNvqdonHgaAo_PEALw_wcB&_x_ns_placement=&_x_ns_match_type=&_x_ns_ad_position=&_x_ns_product_id=710731536-17592320644637&_x_ns_target=&_x_ns_devicemodel=&_x_ns_wbraid=Cj4KCAjw48-vBhBoEi4Ah9fdIAcYtF58yv0hf8uhnDvN8S39YO08Fuh6iLRawxMC_ek4TNzLT_MSzj5LGgIOeA&_x_ns_gbraid=0AAAAAo4mICGtxxJ3r-idrQGnQHjsi7goa&_x_ns_targetid=pla-2088250705615&gad_source=1&gclid=Cj0KCQjwhtWvBhD9ARIsAOP0GoiKOfb0h4-MthA-GPkgmcVnZsyNzmmD4ELydZeFgWxXIrXNvqdonHgaAo_PEALw_wcBAlso, again here.https://www.toolstation.com/streetwize-power-inverter/p18128?store=I6&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&mkwid=_dc&pcrid=null&pkw=null&pmt=null&gad_source=1&gclid=Cj0KCQjwhtWvBhD9ARIsAOP0GohDfl98z8KfalV64leZTyil3WnrN5D0aeD3Vk6xrOIfnRGLx0QwF4oaAvI0EALw_wcB&gclsrc=aw.dsThere's this but its not too forthcoming...https://www.ti.com/lit/an/slaa602a/slaa602a.pdf?ts=1710591740695&ref_url=https%253A%252F%252Fwww.ti.com%252FPage 5 of this seems to be it. Looking for details of the current limiting.https://www.ti.com/lit/pdf/tidr397Page 30 of this says the inverter version which uses a Low frequency transformer is more popular....(compared to the high frequency one)...which is very odd?https://www.ti.com/lit/an/slaa602a/slaa602a.pdf?ts=1710568447195&ref_url=https%253A%252F%252Fwww.google.com%252FIs this why we cant find many schems of HF inverters?The following..says that LF inverters (with a 50Hz iron transformer) are better for motor type loads, ,where there may be surges.The issue with high frequency inverters, (ones that dont use the backward mains transformer)....is that they do not have any transformer, so if a bridge fet fails, then the load will possibly get destroyed...as it will be connected directly to the 350VDC.
Reverse Engineering Egofit Treadmill Serial Interface - Page 1
Forum section: electronics / general

author: hofcake
author_rank: Newbie
timestamp: March 16, 2024, 06:21:38 am
content: I recently decided to pick up a treadmill for my apartment so I would feel a little less bad about spending hours upon hours at my desk. After some not so careful consideration I ended up going with the Egofit Pro-M1. This is absolutely not an endorsement, since this treadmill suffers from the same issues that plague many of the cheaper treadmills (ElectroBOOM has a good video demonstrating these).Once I got it in hand, I noticed there was a usb connector for an accessory that displays speed, steps, etc. and allows for control. I connected it to my logic analyzer and saw:After doing a little head scratching it looks like this is mostly 7 segment display encoding with the first bit being the decimal! All of which is sent over your bog standard 9600baud async serialByte # Encoding Purpose0 unknown1 unknown2 unknown3 unknown4 7SD + Dec Speed [0.X]5 7SD + Dec Speed [X.0]6 7SD + Dec Time [00:0X]7 7SD + Dec Time [00:X0]8 7SD + Dec Time[0X:00]9 7SD + Dec Time[X0:00]10 7SD + Dec Steps 11 7SD + Dec Steps 12 7SD + Dec Steps13 7SD + Dec Steps14 7SD + Dec Dist 15 7SD + Dec Dist 16 7SD + Dec Dist 17 7SD + Dec Calories18 7SD + Dec Calories19 7SD + Dec Calories20 unknown21 unknown22 unknownThe D- wire is completely unused, and I suspect is how the accessory would send commands back to the treadmill itself. I might have to get my hands on one or see if there's an MCU to attach GDB to in order to figure out how that works. I figured I would post this here in case anyone else purchased one and wanted to integrate treadmill metrics and/or control into something else. I am also open to ideas on what to do next, I was thinking a teardown?
Metcal MX-DS1 operation and adjustment - Page 1
Forum section: electronics / general

author: jeryray
author_rank: Newbie
timestamp: March 15, 2024, 02:29:06 am
content: We have some 6 MX5200 stations in use. 4 MX0DS1 de-soldering guns. I have rebuilt many of these MX-DS1. The factory tech support is very poor and not user friendly.What I have learned is (for me) the best air supply should be set to 70lbs regulated.With that setting the vacuum should be at lease 17 in.Replacing the venturi may help.Also make sure there is a little light grease on the rubber gasket.If anyone has air leaks, you should not. When working properly I have at least 3 on one regulator for days (valve closed) no leaks still at 70 lbs.Too much or too little and you won't get the correct suction.Any forum admins here, please post this where it will get some Metcal users help.
Good floor fume extractor Eleshop FE1W pros cons - Page 1
Forum section: electronics / general

author: RiRaRi
author_rank: Regular Contributor
timestamp: March 12, 2024, 03:24:39 pm
content: Hello. I am searching for proper fume extractor. This Eleshop model looks like a good price/quality ratio. Anyone owns it? What are pros and cons and which one do you use?

author: RiRaRi
author_rank: Regular Contributor
timestamp: March 13, 2024, 11:49:17 pm
content: Does anyone have experience with it?

author: thm_w
author_rank: Super Contributor
timestamp: March 14, 2024, 08:57:48 pm
content: I'm sure its fine. You can link the item so people know what you are talking about:https://eleshop.eu/catalog/product/view/id/4245/s/fe1w-fume-extractor/category/347/https://eleshop.eu/eleshop-fe1-filters.html
What is this magical material that image intensifier tubes use for the front? - Page 1
Forum section: electronics / general

author: msalko
author_rank: Newbie
timestamp: March 05, 2024, 10:55:38 am
content: Hi,I'm trying to make my own image intensifier tube.And i can't find anywhere what the front part that turns photons to electrons actually is.I know that it has to do with a photo electric effect, but i doubt that it's a slab of tungsten as it has to be transparent.Does anyone have any information on this?Thanks in advance.

author: msalko
author_rank: Newbie
timestamp: March 05, 2024, 11:18:15 am
content: Ha! There's a website that actually lists materials that can be used as photocathodes (the front bit)https://photocathodes.io/there's some that are dirt cheap to make, like potasium chloride.idk how good that's going to be but, i can test it out easily*dances*

author: ikrase
author_rank: Regular Contributor
timestamp: March 14, 2024, 02:58:14 am
content: In general, these are centered on either alkali metals such as sodium or potassium, which of course must be applied by special methods and may be sensitive to air, or semiconductors such as GaAs. For effective image intensifiers, this is deep in the realm of ultra-purity and exotic stuff.
Segger Flasher Pro 5.17.01 & 5.17.02 ISP Programmer A Look Inside..  - Page 1
Forum section: electronics / general

author: KG7AMV
author_rank: Frequent Contributor
timestamp: March 13, 2024, 07:41:22 am
content: I just got a Segger flasher proThe Flasher Pro 5.17.01A Friend Sent me a Photo Of His Flasher Pro XL 5.17.02Blog Post with More Photo's Soon.https://www.stevenrhine.com/?p=133301
Binocular Loupe 3.5X Magnifying Glasses - Page 1
Forum section: electronics / general

author: BlackICE
author_rank: Regular Contributor
timestamp: March 11, 2024, 05:48:12 am
content: I was recently at the dentist and he had some 45 degree Binocular Loupe with lighting. I ask him about them and he told me they were great from Q-optics and cost about $3k! I thought they would help for most soldering projects, but cost more than a good stereo scope setup. So I went cheap and got these for $41. The working distance seams OK to me, YMMV.https://www.amazon.com/gp/product/B08Z7JGFLF/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1I haven't tested them for soldering yet, but did try them out looking a various things. I think they would work well for projects your naked eye struggles with, but not so small it requires a stereo microscope. I have a low end stereo scope but it working distance is very close. Not made for electronic work.I surprised I haven't heard about using something like this before.

author: amwales
author_rank: Regular Contributor
timestamp: March 11, 2024, 11:18:56 am
content: I haven't tried those, I think that the dentist/surgeon professional ones have a huge working distances (https://www.theloupestore.co.uk/Surgical-Loupes/)The Donegan Optivisors are great too as they fit over glasses and you can get a set of different magnification lenses.Be aware that the higher the magnification the shorter the working distance.Original US Donegan Brand 1 lens ( They offer plastic or glass )https://www.amazon.co.uk/Optivisor-2-75x-Handsfree-Magnifier-Visor/dp/B006BU4WKM/or Chinese with all 4 lenses ( Glass I think )https://www.amazon.co.uk/Magnifier-Professional-Head-Mounted-Binocular-Magnification-1-5X/dp/B0B1DGQT9B/

author: BlackICE
author_rank: Regular Contributor
timestamp: March 11, 2024, 12:38:38 pm
content: Those have shorter working distances. I like to keep further away from the fumes. What I like about these is 3.5x and a working distance of about 40cm. Those others at that mag would be 17cm.
£100-£200 Hot air station recommendations?  - Page 1
Forum section: electronics / general

author: peps1
author_rank: Regular Contributor
timestamp: March 07, 2024, 11:25:54 am
content: Looking to upgrade my YIHUA hot air station, and wanted something with an integrated pump rather than a blower fan in the handle. It only ever gets light use, so fine with a budget option, just want a little upgrade.

author: Jackster
author_rank: Frequent Contributor
timestamp: March 07, 2024, 01:56:47 pm
content: Atten ST-862Dhttps://amzn.to/48SbigoNothing beats it in that price range. I use it daily at work.

author: tszaboo
author_rank: Super Contributor
timestamp: March 07, 2024, 03:01:44 pm
content: Take a look at the Tenma 21-1012 (Farnell). It's surprisingly usable.Maybe there is a version of it sold in chinese shops which are cheaper.

author: thm_w
author_rank: Super Contributor
timestamp: March 07, 2024, 10:51:14 pm
content: We have many threads already. Just ctrl+f hot air and youll see a few...
Alternative to Fluke MC6 Wipes? - Page 1
Forum section: electronics / general

author: wmundstock
author_rank: Contributor
timestamp: March 06, 2024, 05:18:08 pm
content: Hi All.I bought the Fluke MC6 wipes long time ago and they were superb on cleaning a Fluke 289 which was really dark from use. It brought it back to really good shape.I think this product is discontinued. Do you know of another approach, product or solvent that is as good as the MC6 on removing grease and other dirt from the rubber covers?The MC6 wipes had a characteristic odor to it, but I never figured out what it was.Thanks,Walter

author: reboots
author_rank: Regular Contributor
timestamp: March 06, 2024, 05:45:10 pm
content: In place of the MC6, Fluke officiallyrecommendsa third-party pre-moistened lab wipe containing 70% IPA and 30% deionized water. Have you tried isopropyl alcohol?

author: wmundstock
author_rank: Contributor
timestamp: March 06, 2024, 05:57:13 pm
content: Quote from: reboots on March 06, 2024, 05:45:10 pmThanks for the reply.I tend to use IPA like I use WD40, sometimes even brush my teeth with it(obviously kidding).For some dirt, especially the on old multimeters IPA just isn't enough...

author: thm_w
author_rank: Super Contributor
timestamp: March 06, 2024, 11:12:55 pm
content: MSDS:https://www.netes.com.tr/netes/dosyalar/dosya/MC50-MC6_DataSheet.pdfIsoparaffinic hydrocarbon, 1-Propoxy-2-propanol, d-Limonene.This one is not exact but might be decent:https://www.qosmedix.com/qosmedix-professional-makeup-brush-cleaner-4
Aoyue 701 Desoldering Station. - Page 1
Forum section: electronics / general

author: henas
author_rank: Contributor
timestamp: April 26, 2019, 01:10:59 pm
content: I have Aoyue 701 combination vacuum desoldering/solder station not an "A" version. I believe this is knock of the original Hakko 701.Playing with heating elements I managed to short solder part of the circuit. Desolder gun still works fine. Unfortunately two Ics 14 pin and 6 pin have their marking physically removed. 6 pin IC appear to be driver for the triac and seem to be OK but the 14 pin is cooked. I suspect this is quad Op-Amp maybe TL074.Someone might know what IC's were used on this Chinese knock off. I suspect the same as on the original Hakko 701.I already ordered heating element controller from Ebay never less would be nice repair it too.

author: d3m0
author_rank: Newbie
timestamp: March 06, 2024, 10:55:43 am
content: Hi, I send you a PM. Dont know if its workingThanks!
Moxa N5610 programming - Page 1
Forum section: electronics / general

author: oh4mvh
author_rank: Newbie
timestamp: March 10, 2024, 05:46:16 pm
content: Hello all,I have rather old Moxa Nport 5600 series server N5610-16_28. FW is v2.1.18 and from serial console I can find it is test version 1.2 text on boot. One day in the past I tried to upgrade this device to recent v3.x version, but that failed somehow so that e.g. telnet and http configuration is not possible any more (its internal server refuses connect seen in wireshark), and nport configurator is not able to configure it and runs into timeout. I got also FW v2.1.25 (as .rom file) from local representative to try upgrade with nport configurator. This was not either successfull. Moxa charges too much to investigate what is wrong with my unit.Since this device is something I would like to get it work because it still valuable for me and in the same time study how it works, I opended it and found processor board without JTAG connector. See photo how it looks like. Now I have soldered JTAG connector on board and played with Segger Jlink+. First I read firmware on file. Secondly I erased the flash and wrote content back to flash verify this process works as expected.Then I played with .rom file to flash it. I have not got it work, most probably it is just not suitable as it is.If there is somebody who has suitable firmware to this unit suitable for programming via JTAG, I'm interested in.What I don't understand completely is how the Segger's Jlink flash application should be set regarding the RAM and flash bank. Application doesn't have processor Samsung S3C2500B device support on its list, but S3C2510B and/or ARM9 works read/write as I wrote above. When I read I set "use target RAM 512kB 0x0" and flash bank base address 0x8000 0000. But when I write the firmware i need to set "use target RAM 512 0x4000 0000" and flash bank base address 0x0.Is there someone how could explain why this reading and writing need to be performed on different memory locations?Furthermore, there seems to be readable content even in memory address 0x0000 0000 and upwards. I assume processor starts reading memory on 0x0000 0000 when it is powered on. Perhaps there is in the beginning partition table describing the filesystem.I have not been able to read system configuration settings in 0xF000 0000 address to see how memory remapping is set when original firmware is running.Any hints are appreciated, thanks in advance.Best regards
Honeywell model 356358-3? - Page 1
Forum section: electronics / general

author: mini612
author_rank: Newbie
timestamp: February 20, 2024, 04:59:43 pm
content: Hello, I'm new here. I found an old Honeywell Model 356358-3 continuous balance unit. I am looking for the specs or schematic for this unit. I plan on using mainly the Power Transformer for a project, but do not know the specs. I know that it uses four tubes: two 12ax7 and 12au7, which I can assume that the filament is either 6.3v or 12.6v, and the metal can capacitor has three 10uf 450v so I am assuming that the HV is around 300-400v, but I am unsure. Can anyone point me in the right direction? I cannot find anything on this on the web. Thanks
What is better T12 vs C210 for laptop repair? - Page 1
Forum section: electronics / general

author: an_kiwi
author_rank: Newbie
timestamp: February 22, 2024, 03:43:08 am
content: Hi guys,What is better for laptop repair?Let me formulate: Price/performance/reliability.I am tend to like reviews for KSGER T12 2.1, but some ppl say that is like the old stuff now and C210 is far better now.I saw KSGER 180W with 210/245 tips are they too big for fine work?What about T12 for fine work?What would you recommend for daily repair?

author: thm_w
author_rank: Super Contributor
timestamp: February 22, 2024, 11:30:49 pm
content: C210 is better for fine work.You haven't specified what sizes you are talking about, T245 probably down to 0603 is best, smaller C210 probably better.

author: Okto47
author_rank: Contributor
timestamp: February 27, 2024, 02:58:20 am
content: T12 in my opinion feels more like C245 , tip is not as close or as thin as C210 .C210 for small to smallest , C115 for smallest booth great but not really as standard handpiece.For nearly everything possible without microscope I use C245 - way more power. At microscope I use mostly C210 at low magnification. Have only a T115 clone and one JBC C115 point tip - use it rarely.C245 = ~5mm diameter & ~55mm tip to fingers , C210= only ~2.5mm⌀ & ~35mm tip to fingersJBC Tips: check pricing / shapes (JBC Homepage…) C245= ~25-30$ for most common shapes , biggest range , many special tips . C210&115= ~40$ and fewer shapes. JBC tips have one of the best heat transfers but at cost of lifetime and very expensive…Thin tips live even shorter , ( i use dry soft fabric without force for cleaning & a bit lower temp..).T12: no competition at heat transfer… at price not too.JBC Clones &T12 :T12: Has way more shapes as JBC clones , really a lot , more stable quality after finding manufacturers . Way cheaper (not really but most similar priced JBC clones are trash). Thought it’s easier to produce them cheap.JBC CLONES: even the best (+12$) JBC clones I tested need 20-50% longer to heat a area. (Pace & most others need longer too, close pricing to pace tips at +12$ , but pace.. offers way longer lifespan for that lower heat transfer - clones not ).Saw only 3 C115 shapes: 0.1 tip /bendt tip/ knife , for C210 additionally different chisels, mini wave, two horsetoe …. For C245 way more , even few special shapes but some priced too close to JBC ones. All clones with very unstable lifetime , few glow red after some uses , few stop working , others just have not the best plating for long lifetime.The cheaper clones 3-6$ are often shaped horrible, even with burr….Even more unstable life expectations.No idea about Ksger , but some other stations for JBC tips with Smps instead of Trafo have noise at solder tip.
Any good AliExpress ultrasonic cleaners? - Page 1
Forum section: electronics / general

author: exmadscientist
author_rank: Frequent Contributor
timestamp: February 14, 2024, 10:42:10 pm
content: I'm finding myself in need of cleaning some stuff that doesn't quite fit in my existing ultrasonic cleaner, and I don't much want to pay for a new Branson CPX3800H. (It doesn't help that the last time I decided to "just pay for a good one" I bought a Branson 200 and got burned, because the Branson 200 is rebranded trash.) There's a ton, an absolute ton, of ultrasonic cleaners on AliExpress/eBay/Amazon/etc, but a quick look isn't turning up anything that looks worth buying.Things I expect to see in a good ultrasonic cleaner:Timer (ok, they all have that; digital is much easier to use)Heater (yep, not hard; don't really care if it's bang-bang or digital control)Degas mode (not always wanted, but a decent sign that the product was intended for professional use)Swept frequency (there is some debate that this doesn't really do much, but I have in the past had trouble without it)Don'tcare: "soft mode" / intensity controlFits ~240mm long things in its basketsBudget: less than that damned BransonI'm not exactly using this for semiconductor fab clean room work so I don't need the best. It's just hard to sort through the mass of these things all with terrible search functionality and no obvious brands or real reviews on them. Anyone found a good one?

author: thm_w
author_rank: Super Contributor
timestamp: February 15, 2024, 10:18:07 pm
content: https://www.vevor.com/s/ultrasonic-cleaner

author: exmadscientist
author_rank: Frequent Contributor
timestamp: February 16, 2024, 04:36:36 pm
content: Quote from: thm_w on February 15, 2024, 10:18:07 pmAnything in particular noteworthy about those guys? They look like the rest of the AliExpress specials but with higher pricing than I've seen in a few places (which may well be warranted). I only saw one 6L model advertising swept frequency and it was listed as discontinued.

author: thm_w
author_rank: Super Contributor
timestamp: February 16, 2024, 10:04:28 pm
content: They have local stock and might honor their warranty. But if they don't have swept frequency, and you need that, then will have to keep looking.It looks like they have "adjustable frequency" but its a manual toggle.
Is it possible hacking the Weller WX1 solder station into the WX2 ? - Page 1
Forum section: electronics / general

author: N4v4jo
author_rank: Newbie
timestamp: December 20, 2023, 06:31:13 am
content: HiI wonder if the Weller soldering station with one channel can be modified to add a second channel. I guess I will need tom hardware to connect the second iron. But has the board inside the station the hardware needed, populated components to just add a second iron?. I guess it may need also a firmware update?.Thank you in advance.

author: thm_w
author_rank: Super Contributor
timestamp: December 20, 2023, 11:52:03 pm
content: There are some photos here showing the missing components:https://maker.pro/forums/threads/weller-wx1.275334/For firmware there is one for WX1 and another for WX2:https://www.weller-tools.com/us/en/software-updatesMaybe you can try to extract the WX2 and see if you are able to load it onto the WX1 first, if not, there is no point in loading the components.

author: N4v4jo
author_rank: Newbie
timestamp: December 21, 2023, 01:51:30 am
content: Thank you thm_w for your response an links, it seems the board could be populated if there would be a list of components. However I just upgraded the firmware in my brand new WX1 and it turned it into a brick, blank screen. I read in other threads only Weller customer service now can help. Looks like made in Germany is not what it used to be anymore.

author: thm_w
author_rank: Super Contributor
timestamp: December 21, 2023, 01:58:30 am
content: Probably the thread you are talking about:https://www.eevblog.com/forum/repair/just-my-f***ing-luck-weller-wx1-firmware-update-gone-bad/Try another USB key first, seems like the station has a bootloader, surprised if that has died but maybe.If not it might be possible to extract the FW from the upgrade and manually program the PIC32 inside. Maybe. Assuming Weller won't repair it for free.

author: N4v4jo
author_rank: Newbie
timestamp: February 25, 2024, 01:08:35 am
content: Update.Contacted Weller in the US, they asked me to send the unit to them a Weller WX1 since it was still under warranty. At the beginning they wanted me to pay $150 for the repair but after some back and forth I got in the mail a WX2.I appreciate what Weller did to solve the problem.
When are single layer ESD mats adequate? - Page 1
Forum section: electronics / general

author: jusaca
author_rank: Unknown
timestamp: February 09, 2024, 02:33:37 pm
content: From what I read in the past ESD mats for workbenches should typically consist of two layers:- A top layer, which is static dissipative (in the MOhm range), to slowly and safely dissipate any charge on components or PCBs- A bottom layer, which is in the conductive region (kOhm range), to ensure an equally good connection of all parts of the top layerIn our lab we have these double layer mats basically everywhere.But there are also single layer mats like this one from RS Components:https://us.rs-online.com/product/rs-pro/7873114/71005298/As far as I can see these single layer mats all are completely in the conductive range and are therefore not safe to handle ESDS components on. A charged component would possibly discharge to fast when touching the mat.So, wher are these mats used? In which cases are they adequate?

author: thm_w
author_rank: Super Contributor
timestamp: February 09, 2024, 10:08:01 pm
content: https://assets.rs-online.com/v1699883904/Datasheets/2810785848a1f4be51026c1ff91ad2da.pdfYou can put a 1MOhm resistor on the grounding point if you are worried about that.

author: jusaca
author_rank: Unknown
timestamp: February 13, 2024, 10:12:25 am
content: Well, this is what we do with every ESD mat.But a single layer mat still enables quite a large capacitive discharge (wether there is a 1 MOhm at the outlet or not). So the protection is not really given.At least when I understand the difference between these single layer and double layer mats correctly. If my understanding is wrong, feel free to explain.

author: jusaca
author_rank: Unknown
timestamp: February 19, 2024, 12:06:14 pm
content: Is this just a stupid question of me and nobody knows how to respond to it?Or is this a tricky topic and answers might not be so easy or clear?

author: thm_w
author_rank: Super Contributor
timestamp: February 20, 2024, 11:56:09 pm
content: Its not a stupid question.There are some standards for ESD protection you can read about here:https://www.gotopac.com/art-esd-iso-standards-s20-20I don't see any mention of minimum resistances, only maximums.They cover the case you ask about:QuoteOften companies can decide if they want to follow these standards to the letter or not.
New version of the DSN-VC288 dual voltage and current meter - Page 1
Forum section: electronics / general

author: adriansmith31
author_rank: Contributor
timestamp: February 11, 2024, 01:57:57 pm
content: I bought several of those commonly available red and blue voltmeter and ammeter combined panel meters for a project but like the old DSN-VC288 they are inaccurate and have problems. They look similar to the older model but these have no model number on them at all. The PCB design is different but appears to use the same microcontroller.I managed to find one out of 5 that I could adjust to give fairly accurate readings. Surely they are not still as bad as the older ones? Anyone have any opinions on them that they still are a load of wank? I mean they are cheap, yes but you want something that actually does what it's supposed to.I did a video of them herehttps://youtu.be/xB0l7s7tDikif anyone wants to look.
Need a measurement from someone with a JBC 2245 / T245 handle and calipers - Page 1
Forum section: electronics / general

author: minteyay
author_rank: Newbie
timestamp: December 19, 2023, 12:51:02 pm
content: Hi, I recently got a JBC AD 2200 station. It came with the older style 2045 handle, and it doesn't fit all that well in the integrated holder. I'm wondering if the newer style handles have a slimmer metal ring or if the integrated holder's gotten deformed somehow.So, if anyone has a JBC 2245 / T245 handle and calipers, could you measure the diameter of the metal ring that fits in the holder (and is used for the idle detection)?For reference, I measured the 2045 handle's metal ring at a 12mm diameter, and the holder (bit harder to measure since it's rounded) at 11.6mm.

author: Dan_8123
author_rank: Contributor
timestamp: December 22, 2023, 10:02:51 pm
content: About 11.8mm

author: minteyay
author_rank: Newbie
timestamp: December 23, 2023, 10:55:09 am
content: Thanks! 0.2mm might be small enough a difference to just lightly sand away, but I wonder how much that'd mess with the idle detection. There has to be a plating on that right? As is it's a bit too loose for a hot stick holder (as in half the time it jumps out with a very light bump).

author: Dan_8123
author_rank: Contributor
timestamp: December 25, 2023, 07:32:36 pm
content: Since it's all metal I don't see why sanding would cause an issue with idle detection. If you want to be 100% sure just sand a small spot and then hold a wire to it while holding the other end to the holder, if it goes into sleep mode you're good

author: Lajt
author_rank: Newbie
timestamp: February 09, 2024, 09:31:23 pm
content: I used to work with an old AD2200 station and 2045 handle. After years of work I had to replace it with T245.It was a long time ago but I don't remember any fitment issues. I honestly don't think you can do any harm if you widen the slot on the holder little bit.
Metcal soldering tip teardown (STTC-144) - Page 1
Forum section: electronics / general

author: Free_WiFi
author_rank: Regular Contributor
timestamp: April 30, 2018, 05:19:01 pm
content: https://imgur.com/a/pjxPLdi

author: thm_w
author_rank: Super Contributor
timestamp: April 30, 2018, 10:35:22 pm
content: Nice photos.There is another thread here:https://www.eevblog.com/forum/reviews/metcal-sttc-soldering-cartridgetip-teardown/But yours shows the construction of the internal "pellet" that is clearly rounded on both sides and far from the tip.Of course performance is still good, but metcal's image makes it look like the pellet extends all the way up the tip when it clearly does not. Maybe the photo is for another station style or tip geometry?

author: Cerebus
author_rank: Super Contributor
timestamp: April 30, 2018, 11:14:29 pm
content: If you compare that illustration:with what we're seeing here:Then you can see that the pocket that takes the core slug, where the curie effect magic happens, extends at least as far, possibly further than, the raised ring on the actual tip.On a tip I've got here (2.3mm wedge) that ring is only 9.5 mm away from the most distal part of the tip. The part of actual face where most of the soldering goes on is perhaps 8mm away. Don't forget that the tip is, as you can see, solid copper under the plating.

author: Monkeh
author_rank: Super Contributor
timestamp: April 30, 2018, 11:37:48 pm
content: There are some constraints as to what you can achieve with different tip geometries..

author: thm_w
author_rank: Super Contributor
timestamp: April 30, 2018, 11:56:53 pm
content: The slug goes slightly past the ring yes. But clearly different than the photo.Now I'm thinking its just the fact that they colored the two portions copper color, and they aren't specifically saying its the same piece of metal. Simple artistic license for whoever drew the diagram, a technical drawing would show the difference.

author: hurtmanissimo
author_rank: Contributor
timestamp: February 09, 2024, 05:22:28 pm
content: what kind of wire used? i disassembled broken smtc heater (QFP) - wire insulation burnt, teared. experiment to repair
Maplin (?) Tic-Tac-Toe game - Page 1
Forum section: electronics / general

author: PinheadBE
author_rank: Regular Contributor
timestamp: February 06, 2024, 06:42:25 pm
content: Hi,I'm looking for the documentation of an electronic game kit "Tic Tac Toe"I am not sure, but I think I bought it in a Maplin store in LondonAttached are pictures of the board.The LED's are bicolor Red/Green, and the µC is an ATTINY2313-20PUThe PCB and the µC are dated 2007Many thanks

author: Gyro
author_rank: Super Contributor
timestamp: February 07, 2024, 10:29:39 am
content: Have you tried hunting through the Maplin magazine and other publications archive on worldradiohistory?https://www.worldradiohistory.com/Maplin-Electronics.htm

author: PinheadBE
author_rank: Regular Contributor
timestamp: February 07, 2024, 12:07:30 pm
content: Thanks for the tip: Very interesting, and I'm sure I'll find great ideas in it.Unfortunately, the archive only contains publications up to 2001, and the kit was designed in 2007...So, still looking......
Looking for recommendations on an HDMI Microscope Camera - Page 1
Forum section: electronics / general

author: Kimyeti
author_rank: Newbie
timestamp: February 05, 2024, 09:10:50 am
content: Heya!I'm a bit overwhelmed with all the options and mounts for microscope cameras. I hope someone here with more knowledge can help me point in the right directionI'm looking for a camera that can show live footage on a monitor while I repair PCB's and be able to record to an SD card or computer.My scope is this one:https://amscope.com/products/sw-3t24z-frlAnd my budget for the camera is about 600$Thank you in advance!

author: thm_w
author_rank: Super Contributor
timestamp: February 05, 2024, 10:04:15 pm
content: Please read existing threads for ideas:https://www.eevblog.com/forum/reviews/eakins-autofocus-microscope-1080p-60fps-sony-imx-290-sensor/https://www.eevblog.com/forum/reviews/microscope-for-soldering-sony-imx-comparison-fullhd-1080-vs-4k/https://www.eevblog.com/forum/reviews/microscope-camera-best-option/https://www.eevblog.com/forum/reviews/mechanic-rx-4k-48mp-industrial-lab-microscope-camera/https://www.eevblog.com/forum/reviews/eakins-microscope-big-problems/Do you want autofocus? Its doable for the budget.

author: Kimyeti
author_rank: Newbie
timestamp: February 06, 2024, 08:34:57 am
content: Thanks for the input.I'll take a look at the links you suggested.Cheers.
Stereo microscope upgraded - Page 1
Forum section: electronics / general

author: FIX-SH
author_rank: Newbie
timestamp: January 30, 2024, 02:16:58 pm
content: Hello everyone I have been thinking about upgrading to a better microscope and I am currently using a leica m205c with a 1xplanapo objective and I have seen the axio v16 of zeiss and I am not sure if this will be better because I am not sure what the exact numerical aperture of his 1xplanapo z objective is I hope you can give me some advice
One answer to the Microscope Boom Problem - Page 1
Forum section: electronics / general

author: watchmaker
author_rank: Unknown
timestamp: February 01, 2024, 03:20:22 pm
content: I have 4 booms in my watch shop. They are terrific for getting over obstacles like a lathe and bench side panels. But they take up a lot of real estate.As you can see, my temporary (while I experiment with configurations) lab bech is already cramped. I have about 20 feet of good horizontal space in the watch shop that is well lit and I am thinking of downsizing that operation and moving the lab to there. In the meantime, needs must.Anyway, I do not have the space for a boom mount base. I did have an AO desk mount. Weighted down by my polishing block, it works well. The mount is attached to gasket paper with double sided tape so I can move it without screwing up my surface cover.I may use a focuser to mount a PCB holder and clamp it to the end of the bench so I can raise and lower the board for focus rather than change my sitting position which would be required by focusing at the head.I looked through the catalogs and there exists a desk mount with double slides on a U-foot that looks like it was made exactly for this purpose. I am now fishing for one.I simply take the head off my watchbench and carry it to the lab bench. Here I use a .4x barlow which gives me the right head position and working distance.
XGecu T56 vs Revelprog-IS programmers? - Page 1
Forum section: electronics / general

author: Veteran68
author_rank: Frequent Contributor
timestamp: September 01, 2023, 09:14:03 pm
content: I'm trying to decide between the T56 and Revelprog-IS universal programmers. I've searched and while I find plenty of information about each on it's own, as well as a decent video comparing the TL866II, T48, and T56, I've found nothing comparing the the T56 to the Revelprog.Does anyone here have experience with both that can share some pros and cons of each? When would one work better than the other? I know the T56 has the VGA/HDMI feature but I don't expect to use that. Both have a wide assortment of adapters and clips, and both support all the major flash devices. Prices for both units are similar, although some of the Revelpro adapters can get quite pricey. Not sure that means its better for typical hobbyist/maker/repair purposes though.

author: Veteran68
author_rank: Frequent Contributor
timestamp: September 13, 2023, 09:13:10 pm
content: *bump*/taps mic... "Is this thing on??"266 views and nobody has an opinion on the T56 vs Revelprog? I'll take just raw opinion over hard experience if that's all ya got.

author: Electro Fan
author_rank: Super Contributor
timestamp: September 14, 2023, 04:00:21 am
content: +1 for it would be interesting to hear about how they compare.

author: JimboJack
author_rank: Regular Contributor
timestamp: September 16, 2023, 01:37:53 am
content: Well I use the T56 :-1. Support of oldie EPROM programming +25V high voltages not many support pre-interweb technology, on a USB Port , unless you want to use LPT.2. Quick simple TTL/ CMOS function tester.3. Adapters are cheaper for 32-44 pin programmer modules ATMEGA etc.4. Updates every few months.5. The burner program works on my bench laptop running Windows XP 32bit.J.

author: MarkS
author_rank: Unknown
timestamp: September 16, 2023, 09:51:39 am
content: Many of the projects I have in the pipes use the SST39SF Flash chips. Looking at the Revelprog-IS compatibility list, it puts it out of the running. YMMV.

author: wraper
author_rank: Unknown
timestamp: September 16, 2023, 09:57:00 am
content: Quote from: JimboJack on September 16, 2023, 01:37:53 amThe problem is that 500mA from USB port is often not enough for those old EPROMS. I have USB programmer which supports them but asks to plug in 12V PSU which normally is not required.

author: bobdring
author_rank: Contributor
timestamp: January 30, 2024, 12:59:32 pm
content: I just saw a reverse engineer of a large APC UPS’s PROM from around January 2024 on renoa’s auspicious travails youtube channel. She uses the revelprog and seems happy with it. It seems it may have a feature to generate checksums/crc from just a selected area of the rom image and that may be very useful. Not sure if that feature is present in other brands.
Heads up on Ebay New Ersa ICON/Itool kits ($200) - Page 1
Forum section: electronics / general

author: watchmaker
author_rank: Unknown
timestamp: January 22, 2024, 11:04:31 pm
content: This seller seems to come up with these on more than one occasion.Of course, this one showed up two week after I got my used Icon with Tech Tool. In the meantime I had replaced the display and bought a 5th tip.But I did what you would do, I bought the damned thing.If you are in the market and can wait, watch this guy.https://www.ebay.com/itm/235387913557?orig_cvip=true&nordt=true