hybridfree/eevblog-posts huggingface dataset:
Powertronix Isolation Station - Page 1
Forum section: electronics / general

author: bdunham7
author_rank: Super Contributor
timestamp: June 01, 2022, 07:41:58 pm
content: I found these on eBay and they might be a good deal for someone looking for a robust 600VA combination isolation and step up/down transformer. eBay has enough pictures of the outside, so I just posted one of the inside here--since I tore it apart before turning on, as per the motto. It's all C13/C14 connectors so you need little adapter cords, but those are typically available and make it handy for worldwide use. I bought one for a 240VAC bench source and one for a long-term travel power adapter, but it might be a bit big for that. You get 230/115 selection on both input and output. I tested it for leakage, it has ~40uA so not medical or metrology grade but adequate for most purposes. I didn't test load regulation yet, but it has a pretty large toroid so probably pretty good. It looks really solid and well made--there are literally just too many screws holding the thick stamped aluminum chassis together. I'm not in any way associated with the seller, but everything was very good including double-boxed packaging.https://www.ebay.com/itm/134092407056
Ersa IR500  solder SMT rework station.  Still relevant?? - Page 1
Forum section: electronics / general

author: dazz1
author_rank: Frequent Contributor
timestamp: May 14, 2022, 03:28:25 am
content: HiI have come across a Ersa IR500 smt solder rework station.I found a really old article/review herehttp://www.digifixltd.co.uk/articles.htmlwhich says nice things about it. The price then was eye watering.Getting original vacuum suction cups could be an issue, but I suspect others are suitable.Is this thing still relevant/useful or is there something better/cheaper etc?

author: thm_w
author_rank: Super Contributor
timestamp: May 16, 2022, 09:15:10 pm
content: Without providing a price, we can't say if there is something better/cheaper.It looks quite good. Maybe only limitation is the preheater (400W), so medium/small boards.https://toolboom.com/en/infrared-soldering-station-ersa-ir500a/The IR bulb will not last forever, so you may want to look up what part that uses.https://www.eevblog.com/forum/reviews/bga-rework-station-t862-halogen-lamp/

author: dazz1
author_rank: Frequent Contributor
timestamp: May 19, 2022, 10:54:03 pm
content: HiI am thinking if parts are still available, they are likely to be way too many dollars.I have a hot air rework station that does what I need. I don't do BGAs so the Ersa IR500 would be a nice to have that I would rarely use. Maybe never.The one I am looking at is about 1/10th the original new price. I think I should spend my cash on something else.

author: _Wim_
author_rank: Super Contributor
timestamp: June 05, 2022, 05:20:42 am
content: I have one of these that I bought cheap locally (250€) and I like it. For suction cups I use these from Ali-express:https://www.aliexpress.com/item/32766278446.html?spm=a2g0o.productlist.0.0.552b3409Rt3TrC&algo_pvid=03439d2e-1ed9-4bfd-9441-07427ce07de6&algo_exp_id=03439d2e-1ed9-4bfd-9441-07427ce07de6-0&pdp_ext_f=%7B%22sku_id%22%3A%2265954847888%22%7D&pdp_npi=2%40dis%21EUR%21%219.11%219.11%21%21%21%21%400b0a555e16544059565736566e9dc4%2165954847888%21seaHave not yet replaced any heating elements, but it uses an Elstein T-HTS 400 heating element for the bottom heater and something similar for the top heater (have not checked that one). These elements still same available.
Puhui T-937 sound check - Page 1
Forum section: electronics / general

author: liteyear
author_rank: Regular Contributor
timestamp: July 05, 2022, 05:00:58 pm
content: Just fired up my new T-937 after owning a T-962 for a while. The fan functionality seems to be just what I was missing from an otherwise pretty useful oven.The oven makes an unusual gurgling noise, like ball-bearings rolling over each other, in addition to the regular fan whine. Not too harsh, but more than I would expect from an IR heater. Is that normal? Video attached (okay, audio only supported - for visuals, the oven cycles from heat to fan part way through the clip), but now I check it's barely perceptible. Trust me, it's there! @lamabrew, perhaps you can corroborate?
Cheap Ultrasonic Glasses Cleaner for PCBs - Page 1
Forum section: electronics / general

author: bozza
author_rank: Contributor
timestamp: May 31, 2022, 05:54:33 pm
content: Has anyone else seen those cheap ultrasonic glasses cleaners on Amazon? Most of them don't have any heating elements and none of them have any frequency controls or sweep functions.They do cost about a tenth of an industrial ultrasonic cleaner though!Was anyone here brave enough to clean a pcb in one of those? What would the end result look like? Is it a bad idea altogether?
IKEA LEDARE teardown. - Page 1
Forum section: electronics / general

author: jchw4
author_rank: Regular Contributor
timestamp: May 26, 2022, 01:23:58 pm
content: My old IKEA LED bulb started flickering. No longer useful, so let's take it apart and maybe try to fix itThis is (was) LED1465G13 (IKEA LEDARE US version). I installed it probably 5-6 years ago, and it ran about 8 hours daily.Initial inspection showed a cracked outer shell with potential heatsink under it.The shell cracked on the side and also on top.Not very promising ;(Diffuser removal was successful! Hooray!LEDs look cracked but not burned, plastic cracked.The LEDs assembly drops out. Thermal design could be better ;(We probably see a culprit.But the whole assembly is heavily potted and I don't see any way of removing this capacitor.

author: jchw4
author_rank: Regular Contributor
timestamp: May 26, 2022, 01:27:25 pm
content: Even if I fit a soldering iron inside I could not lift the capacitor. There is absolutely no space around. ;(Let's maybe do some measurements.Now the repair that started for good does not seem to be very feasible ;(What if I remove the screw connector? Could I push the board through?After some wiggling:Oops ;(Ok. Forget the repair. Let's at least see how it was made.Destructive teardown time:Ok. After a lot of work we basically have the same bulb. It is now made of aluminum. Otherwise still the same:Do you remember that feeling that you'd better stop with this useless process that takes more and more effort? That was it.Hmmm.Let's try to scrub and cut through the potting with a flat screwdriver, tweezers and a paper knife.Not very successful.I probably needed a saw at that point. And the process started to become difficult!I would have dropped this disassembly but the nearby makerspace had a band saw. This was exactly what I needed!Still not much.

author: jchw4
author_rank: Regular Contributor
timestamp: May 26, 2022, 01:30:12 pm
content: It's interesting though to see that the outer plastics did not fully cover the inside of the metal pipe. You can see that it only covers the bottom.Some peeling.We are getting something!There is probably no reason to keep it intact. Let's desolder the through hole parts and clean it even more.All the LEDs still light up fine. 121GW reports about 5.6V across each (manual says it uses about 5-7mA current).Let's look at the board.You can see the carbonization where it heated up most. That large cap that we saw above became a heater!And the second one probably too.

author: jchw4
author_rank: Regular Contributor
timestamp: May 26, 2022, 01:32:25 pm
content: The parts:Googling for the main IC label MRVL 00 187A4W1-SAH2 turned out to be tricky, but I finally believe that it is Marvell 88EM8187 .The product page was retired, but the web archive found the old product brief with reference schematics and an especially useful photo of the eval board that looks very similar.So in the end I basically ended up with a Marvell 88EM8187 eval board and had to buy a new IKEA bulb
Hakko FM-203 flashing options - Page 1
Forum section: electronics / general

author: koitsu
author_rank: Newbie
timestamp: July 02, 2022, 07:46:22 pm
content: Has anyone had experience upgrading a older FM-203 to work with the FM-2030 heavy duty handpiece? I see that per Hakko's knowledgebase, certain early SNs require an upgrade, although I'm not certain if this entails a new control PCB swapped in or if they simply flash the MCU and send it back. Either way, they claim it is not field serviceable.What I can tell looking inside the unit in question is that the MCU is a Renesas R5F21258SNFP. Board marking is FM-203 M1285-A11 and there is what I assume to be a programming header as well.Just curious if anyone has been through this or can offer any suggestions.
Hakko T12 D52 tip performance measurement (Quicko clone) - Page 1
Forum section: electronics / general

author: thmjpr
author_rank: Regular Contributor
timestamp: May 23, 2022, 07:30:58 am
content: In a previous Metcal thread, there was discussion of a thermocouple test board used to measure iron performance.I made a 12 x 12mm copper slug, drilled and fit sensor in the center to attempt to get a decent average temperature measurement. Its not fast response at all, however maybe SDG will be going that route.The test procedure:- Power on iron, allow 30s to stabilize- Start recording sensor temperature- Place solder on tip- Place tip on top of copper slug, at angle of tip- Apply normal soldering pressure for 150sFirst comparison is between a genuine Hakko and a clone tip, both 5.2mm:Clone tip is a T12 D52Quicko. Both tips had station set to 320C and measured ~333 and ~331C with a thermocouple.You can see the difference in performance between the two D52's. The circle is about where I noticed solder on the copper top turn liquid, almost 10 seconds difference. Of course this is worst case, a big hunk of ~10g copper.Heater coil resistance is usually lower on a genuine tip, but its not much, I measured peak power (24V DC):- 71-72W on genuine- 67-71W on clonesI suspect poor clone performance comes down to:- Overall worse coupling from tip to part (eg thicker plating)- Bad feedback from tip to thermocouple (eg thermocouple is further away or not contacting well where it sits inside the cartridge)Next various tips, performance scales down as tip size decreases, as we expect:Future ideas:- Compare other brands (even worth it when the better Hakko tip is only $15?)- Compare smaller tip sizes- Compare Handskit to genuine Hakko station (control loop + AC vs DC power)- Play with control loop to boost output when heater power is high for an extended time. Would this even work? JBC might have something that they do, but probably more complex.

author: thmjpr
author_rank: Regular Contributor
timestamp: May 23, 2022, 07:38:40 am
content: Quick Metcal comparison:Interesting result, with the large tip they both heat up equally quickly until the solder melts, then Metcal seems to give up.Need to figure out how to add a power graph to make things a bit more clear.
Sawstop cartridge teardown. - Page 1
Forum section: electronics / general

author: jchw4
author_rank: Regular Contributor
timestamp: May 26, 2022, 10:32:47 am
content: I got my hands on a triggered Sawstop cartridge from a friend. (No flesh was involved. Semi-wet wood made him buy another one and I got this one for fun (and parts).)The overal mechanical design is probably better explained in many youtube videos.But I could not find highly detailed PCB photos so I took them myselfThe capacitor is nice, after a day it shows ~2nA of leakage across 9V battery. What else could be reused?I also wonder why they used so many parts? I thought that it is a relatively simple device.
New type of oxygen battery - Page 1
Forum section: electronics / general

author: daisizhou
author_rank: Super Contributor
timestamp: May 13, 2022, 12:27:47 am
content: The novel coronavirus pandemic,Many ventilators use oxygen cells.A traditional oxygen cell is a chemical reaction that produces a voltage or current that is linearly proportional to the oxygen concentration.But they all have a lifespan and need to be replaced after a while.Below is the long life oxygen battery, I disassembled it, but the core I can't disassemble.Does anyone know how it works?Or how to fix it, it is currently damaged and the fault is low oxygen concentration

author: daisizhou
author_rank: Super Contributor
timestamp: May 13, 2022, 02:47:07 am
content: The above one is different. It seems that the oxygen concentration is measured by attracting oxygen molecules by electromagnetic force. I don't understand the specifics.The 2 round ones are the electromagnet coils.That's the difference

author: jpanhalt
author_rank: Super Contributor
timestamp: May 13, 2022, 09:57:06 am
content: A paramagnetic sensor:https://industrialphysics.com/knowledgebase/articles/paramagnetic-cells-technology-for-our-paramagnetic-o2-analyser/Several manufacturers appear on a search.

author: daisizhou
author_rank: Super Contributor
timestamp: May 13, 2022, 11:31:31 am
content: it seems so.But the reality is complicated, the interior cannot be disassembled.The white ceramic part in the picture above should be the core, I can't disassemble it

author: daisizhou
author_rank: Super Contributor
timestamp: May 14, 2022, 11:55:58 am
content: Under normal conditions, this oxygen battery life is almost permanent.This battery lasts 8 years.There seems to be a big difference between the model and the real thing
Monarch M70 Soldering Station - Page 1
Forum section: electronics / general

author: lenin_chak
author_rank: Newbie
timestamp: May 07, 2022, 09:34:10 am
content: Hi,Anyone heard about Monarch M70 Soldering Station? When I was about to buy Hakko FX888D, one seller suggested Monarch M70 station. He said this "Monarch" is part of 'OK International'. But I couldn't find the product on OK International's catalog.Seller's product page:https://mectronics.in/principal-wise/monarch/soldering-station/203I found only one video on Monarch M70 soldering station in Entire YouTube.By comparison, Monarch M70 seems reach set temperature 350C in 20 secs. It looks faster than hakko. And specification also seems like Hakko.Any suggestion, plz? Should I buy Monarch or Hakko?

author: thm_w
author_rank: Super Contributor
timestamp: May 10, 2022, 09:19:12 pm
content: Any T12 station you can find instead?What prices?OKi does not sell cheap stations like this.
Dodgy T12 Tips or bad KSGER handle? - Page 1
Forum section: electronics / general

author: mckenzie
author_rank: Newbie
timestamp: May 13, 2022, 08:36:01 pm
content: Hi, I recently got hold of a KSGER T12 station & ordered a pack of tips from banggood -https://www.banggood.com/Drillpro-10pcs-T12-Soldering-Iron-Tips-Set-for-HAKKO-FX951-FX952-p-1191594.html?cur_warehouse=UK&rmmds=searchThe tips have to be really forced into the handle to work properly. After not too much time so far two of the tip ends have snapped off inside the handle, see pic. I've managed to take the handle apart a few times & bodge out the broken ends so I can use the handle again but I'm trying to work out which is the faulty product - the cheapo Chinese handle (too tight fit) or the rip off Hakko tips, or both?Can anyone recommend a decent handle that's compatible with the KSGER T12 station that's a good fit with the tips? Or maybe it's just the tips I have that are the problemcheers for any help

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 13, 2022, 08:55:33 pm
content: Hard to tell, disassemble the socket and see if there're any plastic leftovers from the injection molding.

author: thm_w
author_rank: Super Contributor
timestamp: May 13, 2022, 09:35:12 pm
content: That handle design is fine, as David said its some manufacturing defect causing it to be too tight.Although there are slimmer styles available if you are into that. Just make sure you get 5-pin version to match your station.

author: mckenzie
author_rank: Newbie
timestamp: May 14, 2022, 11:03:57 am
content: Looks like it's the handle that's the problem then. Thanks for the info.
Would you pay $95 for a part ID? - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: May 08, 2022, 01:18:39 pm
content: An electronics store is offering a part finding service, no doubt to help people keep old equipment limping along. Is it worth it to you? Maybe its nearly impossible to figure out what a part is?https://www.greenbrookelectronics.com/component-eye-d

author: madires
author_rank: Super Contributor
timestamp: May 08, 2022, 01:35:32 pm
content: They'll keep US$ 25 if they can't identify the component. We have a thread for this, and it's free:https://www.eevblog.com/forum/chat/what_s-this-please-(component-advice)/

author: PKTKS
author_rank: Super Contributor
timestamp: May 08, 2022, 01:42:21 pm
content: Actually as i ve seen here ... we have several dozen folks with same problem..And many dozen other heads that can answer when they can...Paul

author: cdev
author_rank: Super Contributor
timestamp: May 08, 2022, 05:32:02 pm
content: A small but significant percentage of parts are not easy to identify. If I was a parts seller I'd just identify any I knew.. I would only charge in a really rare case when I had to spend a serious amount of time figuring it out.The AVR Transistor Tester is very useful with many parts.. figuring out what they are...Its a fun challenge.. tools too..Some cable TV show (This Old House) has a humorous tool identification game.. I have some of these inexplicable tools..

author: james_s
author_rank: Super Contributor
timestamp: May 08, 2022, 07:00:40 pm
content: I certainly wouldn't. How could it be any better than just posting a picture of it on this forum?

author: coppercone2
author_rank: Super Contributor
timestamp: May 09, 2022, 01:17:14 am
content: I guess its all about how much time you have.
Metcal SSC tip question - Page 1
Forum section: electronics / general

author: Prizmatic
author_rank: Regular Contributor
timestamp: May 04, 2022, 03:58:12 am
content: I recently bought some SSC tips and the laser engraving/finish are different than what I normally get. Can someone confirm these are legit' tips? The SSC 638a at the bottom of the pic is what I'm used to seeing:I contacted Metcal EU but have not received a response, either they can't be bothered or I'm asking a stupid question

author: thm_w
author_rank: Super Contributor
timestamp: May 04, 2022, 08:08:49 pm
content: I've never seen a counterfeit metcal tip, I think its not worth bothering to think about.You can see a similar engraving here:https://teamequip.com/metcal-replaceable-tip-cartridge-ssc-701a-t3839/

author: Prizmatic
author_rank: Regular Contributor
timestamp: May 05, 2022, 12:32:26 am
content: Thanks for the link. Must have changed production at some point, perhaps this is older stock.
KLUCG4 emmc ? need to read contents - Page 1
Forum section: electronics / general

author: alpher
author_rank: Frequent Contributor
timestamp: May 04, 2022, 12:13:03 am
content: I need to read EMMC memory chip (i guess ) from an older android phone.The closest to the specs I found is in this link:https://semiconductor.samsung.com/estorage/ufs/ufs-2-0/klucg4j1cb-b0b1/Got myself a XGecu T56 programmer together with what I hope is the right adapter (BGA 169,153), see the pics.I'm not really familiar with the emmc memories and the XGecu software, much appreciate any help here.I'm used to other types of programmers and usual thing is when I start typing the part number ever shorter list of possible matches comes up.?Not so much here, here I have a list of all emmcs from 4G to 64G and variations for each capacity?I know my device is 64G and I wont be doing isp, but what are the other options?:X01u, A52 and B52 ? which one?I really don't want to screw this up as I have some coins worth ~$4k there.Any pointers much appreciated.

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 04, 2022, 08:33:53 am
content: That EMMC is Samsung, so start by looking at 64GB samsung EMMCs.EMMC pinout is standard, following JEDEC specs, you won't cause magic smoke by selecting a wrong part.The commands are the same between them, what's "Read ID" in one brand won't be "Wipe memory" for a different one.In fact most of EMMCs can be read with a simple SD card reader, in either 1 or 4-bit mode, as it has MMC inheritance.Just initialization timing might be different, or sector sizes, the worst that could happen is reading garbage.
Advin Systems Pilot U128 Plus Universal Programmer - Page 1
Forum section: electronics / general

author: Shock
author_rank: Super Contributor
timestamp: April 29, 2022, 10:03:00 am
content: Does anyone have an Advin Systems Pilot U128 Plus, or a programmer in that series and know how the upgrade process worked from the U44/U84 Plus models to the U128 Plus? Apparently they can be upgraded.https://www.advin.com/universal-programmer/universal-programmer-u128-pic.htmhttps://www.advin.com/universal-programmer-chip-list.htm#LEGACY
Linear AC/DC 240 VAC - 12 VDC adaptor - Page 1
Forum section: electronics / general

author: mattko
author_rank: Contributor
timestamp: May 23, 2022, 11:56:16 am
content: Hi all,does anybody know where can I get my hands on one AC/DC linear power supply? It seems only switching power supplies are available nowadays. I need it to power some equipment in the EMC chamber during radiated emissions test and not to cause additional EM noise. I think this kind of PS's stopped being sold 15 years ago?

author: taste_tester
author_rank: Regular Contributor
timestamp: May 25, 2022, 08:30:18 am
content: Regardless of whether or not you truly need a linear supply, there are literally thousands of industrial linear power supplies on eBay.
OKAI ES200 Lithium Battery BMS - Page 1
Forum section: electronics / general

author: sperb
author_rank: Contributor
timestamp: July 08, 2021, 09:30:42 pm
content: Hi Folks,Just sharing the schematic of the BMS inside the battery pack of the ES-200 electric scooter. It is a 10S4P battery with integrated BMS. Follow some pictures for reference:And the SCH i generated from the PCB:PDFTo use the battery for other applications (outside of the original scooter), a TTL serial communication is needed to keep the BMS active. At 9600 baud, send the bytes (0x3A 0x13 0x01 0x16 0x79) every 5 seconds to the blue wire. This will allow the pack to be discharged with up to 25Amps. If the communication is not in place, the BMS will wake up, but will turn off when a load is connected to the output terminals.Regards.

author: geo999
author_rank: Contributor
timestamp: April 20, 2022, 08:05:50 am
content: Any chance anyone has similar information (schematic) on the ES400 battery BMS.Trying to convert the battery for a solar system instead of converting it to e-waste, but BMS is preventing any significant power draw, turning off mosfets.Problem is that this BMS (ES400) is doing communication over CANbus, have not seen any activity on the UART RX, TX.The STM32F0 is in Level 1, can't dump flash memory.No access to the scooter to dump canbus communication and find the right message.Any information would be helpfulthank you,Geo
JBC "Soldering Assistant" Value (JBC CDEB VS JBC CDB)  - Page 1
Forum section: electronics / general

author: clanderson
author_rank: Newbie
timestamp: May 06, 2022, 01:12:19 am
content: What's everyone's take on JBC's new line of compact stations? More specifically, has anyone had their hands on their new "Soldering Assistant" version? How does it stack up against the base level station? I see the (peak) wattage even differs between the two.For those interested:JBC Compact Soldering Station with Soldering AssistantJBC Compact Soldering Station

author: SteveyG
author_rank: Unknown
timestamp: May 06, 2022, 07:52:21 am
content: I got to test one of these recently and I plan to get one to do a video on one in a month or so.Unlike the Metcal system CV system which assesses the thermal profile against an algorithm to determine if the IMC has properly formed, this unit requires the user to perform a reference solder joint first, which is then recorded as a thermal profile. Future solder joints are compared to this reference, so it works well for repeated soldering, such as a bunch of PCB terminal blocksAt least with the version of firmware I tested, the weakness is you would not be able to swap to different types of solder joint quickly or different components since the thermal properties will be different, thus the reference waveform will no longer be valid. Like the Metcal system, it does struggle with small SMD components since they generally have only a very small thermal mass.As a general soldering iron it's fine though and modernises the look by swapping out graphic monochrome LCD for the TFT seen on the modular systems.I did a few videos on the Metcal CV system last year.

author: clanderson
author_rank: Newbie
timestamp: May 06, 2022, 10:42:30 pm
content: That's very useful information, thanks Stevey.I wonder why the ~30w difference in peak power between the assisted version and non assisted version.

author: thm_w
author_rank: Super Contributor
timestamp: May 07, 2022, 12:08:07 am
content: Quote from: clanderson on May 06, 2022, 10:42:30 pm150-30 = 20W.The website spec is wrong it seems, in the manual it shows as 130W:https://www.jbctools.com/pdf/manual-cdeb-soldering-station-0026942_ID-207199.pdfInternally they will limit power going to the T245 handpiece as well.
NEWEST KSGER T12 STM32 V3.1S new PCB with inactive battery  - Page 1
Forum section: electronics / general

author: porlock
author_rank: Contributor
timestamp: March 19, 2022, 11:15:10 pm
content: Hey, looks like latest version also marked as v3.1S does not have battery powered RTC, battery it self is placent on PCB and it has approx 3V, but after reset clock is reset as well.No idea why but it seams that is by design as it was described on product page that this version does not support real time clock, anyone know how restore this function ? or know anything about this new PCB, maybe schematics are available ?

author: DavidAlfa
author_rank: Super Contributor
timestamp: March 19, 2022, 11:50:20 pm
content: Probably related to the mm32 they started using, perhabs there wasn't enough memory for everything.

author: Ricks_Radio
author_rank: Contributor
timestamp: April 28, 2022, 11:25:34 pm
content: I have the same board in my T12 V3.1s. The battery maintains the real time clock when the AC is disconnected on my unit. I would think that a RESET will reset everything - including the clock.There is some debate as to what board this is. On my unit if I look between the front panel and the printed circuit board, near the solder iron connector, I can see that the board is markedT12-V20. This suggests that it may be an old version 2.0 controller board. The V2.0 board apparently had a problem with overheating. Here's a link to that discussion on this forum:https://www.eevblog.com/forum/reviews/t12-stm32-v2-1s-soldering-station-controller-schematic-etc/new/I have a minor problem with my V3.1S. I am unable to clear the J02 tip. I do not have a J02 but it seems to be locked into the firmware? I can set and select my 6 tips but I can't clear the check mark for the J02?Rick
MC4 DIY recommended crimper / tools, connector / PV wire selection? - Page 1
Forum section: electronics / general

author: evb149
author_rank: Regular Contributor
timestamp: April 25, 2022, 01:58:23 am
content: Hello I'm looking for suggestions on selecting MC4 type PV connector relatedrecommended crimper / tools, and for connector, PV wire selection?Looks like some Amphenol connectors may be available, I'm not sure about whetherbetter alternative vendors' series are in some ways better.The Amphenol crimp tool is ~$450 which is a bit high for occasional use starting with a very small project,while for instance I notice IWISS has a couple of under $50 MC4 models that seem to have OK reviews.What tools / tool kits have you used and can suggest as a good value for suitable quality?What wire sources / types have you used for ELV DC systems?Corresponding outdoor use wire to PCB board connectors ( & corresponding tools)?

author: coppercone2
author_rank: Super Contributor
timestamp: April 25, 2022, 03:16:41 am
content: I use the MC4 with a reinstag crimp tool. I think I got it for 300$. Expensive but FUCK roof maintenance.https://www.solarpanelstore.com/products/rennsteig-mc4-crimping-tool-locator-14-12-10awg

author: coppercone2
author_rank: Super Contributor
timestamp: April 25, 2022, 03:57:31 am
content: just be careful about the jaw, make sure its for MC4 of SF and CF threads *cut vs stamped*The barrels should look like squares and the stamped and formed like a molex. Most tools are for SF. If you try the CF with a SF die, it gets really really deformed, but it might trick you if you are busy with all the solar crap.

author: coppercone2
author_rank: Super Contributor
timestamp: April 25, 2022, 04:36:22 am
content: cut means lathe (tube) and stamped means press (oragami). the ones that fold are stamped and the ones that deform into a square are lathe cut (barrel).Presumably the barrels is a little better but its more expensive to get the tooling and the connectors are more expensive.I think 95% of what people talk about and sell is for stamped (SF).The CF ones are solder or crimp (well, at least theoretically) and the SF ones don't make sense to solder since its a little weird bent metal bit.I am just saying because I put a barrel into the stamp tool when I was in ahurry and it was really hard to actuate and I am suprised the tool did not break and the connector was real squished and ugly looking (pretty bad over crimp). But the connection was 'solid', so if you just hand the tool to someone that has no idea what their doing they might be fooled since it works despite looking like it got imploded, but that means it might have torn strands, deformed the metal in such a way that might lead to cracks or I think most likely reduced tensile strength (it actually measures OK electrically on a miliohm meter)

author: tooki
author_rank: Super Contributor
timestamp: April 25, 2022, 03:54:07 pm
content: And bear in mind that with the high voltages and currents these connectors have to carry, this is an application where you do not want to save money with Chinese clone connectors. The original MC4 design is from Stäubli (formerly Multi-Contact).
What are efficient lights for starting seedlings (for garden)  LEDs? - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: April 24, 2022, 02:45:11 am
content: I'm looking for suggestions on plant starting lights.. Anything... These are also for working under...and startingt vegetable seedllings, and making the desk area more outdoor like hopefullly...

author: Marco
author_rank: Super Contributor
timestamp: April 24, 2022, 05:09:53 am
content: I don't know how relevant it still is, since technology moves on ... but doing some youtube searching about the flip chip COBs a few years back I ran across this video which suggested they were pretty decent.

author: wraper
author_rank: Unknown
timestamp: April 24, 2022, 05:44:51 am
content: There is no advantage in those Chinese red/blue (purple) lamps. Most of them are inefficient, flickering and probably not electrically safe garbage. Regular 3000-4000K LED lamps work almost as well as best full spectrum specialized lamps.

author: Kleinstein
author_rank: Super Contributor
timestamp: April 24, 2022, 08:52:29 am
content: The usual plants can use red and blue light. They look green because the green is not used.So special lamps can have some efficiency advantage, but normal white LEDs are also not that bad, as they also have a maximum in the blue and phosphore part somewhere in the red / yellow. The low CRI lamps often have reduced green anyway.Most plants can not actually use the full intensity of the sun and there is no real need to get the full intensity of the sun light.

author: thm_w
author_rank: Super Contributor
timestamp: April 25, 2022, 09:46:56 pm
content: Quote from: wraper on April 24, 2022, 05:44:51 amThat and, who wants a red/blue light in their room? It gets irritating after 5 minutes of actually being around it.You can get $20-30 complete LED fixtures from home depot with 5 year warranty, 4,500 lumens+. Should be enough for seedlings with them right underneath.https://homesteadandchill.com/using-grow-lights/

author: cdev
author_rank: Super Contributor
timestamp: April 25, 2022, 10:05:49 pm
content: I don't know if any are worth the money. I just told my wife that temperature and 'overheat' destroy LED lights and that white lights are probably as good as red/blue and more pleasing light to the eye.. I certainly don't expect any miracles.. we just want to save money on starter plants..(which are hugely overpriced) and sprouting for greens.. /herbs / tasteQuote from: evb149 on April 24, 2022, 09:21:02 am
Any opinion on WY815P soldering station? - Page 1
Forum section: electronics / general

author: pmaggi
author_rank: Contributor
timestamp: April 07, 2022, 06:10:15 pm
content: Hi, does anyone has experience with this compact soldering station?https://www.aliexpress.com/item/1005004068741521.html?spm=a2g0o.productlist.0.0.50e759d4QsOvxr&algo_pvid=4830dde6-985f-40ef-9b54-cf983364dc27&algo_exp_id=4830dde6-985f-40ef-9b54-cf983364dc27-0&pdp_ext_f=%7B%22sku_id%22%3A%2212000027933104589%22%7D&pdp_pi=-1%3B85.31%3B-1%3B56.92%40salePrice%3BUSD%3Bsearch-mainSearch

author: PeterG
author_rank: Frequent Contributor
timestamp: April 08, 2022, 03:15:54 am
content: I notice they claim this is T12. Those are definitely not T12 tips. I would move on and look for something better.

author: thm_w
author_rank: Super Contributor
timestamp: April 08, 2022, 08:47:49 pm
content: Yeah not T12, and a 2-in-1 unit.Unless you absolutely need the desk space savings, better to get two dedicated units:- a 858D or clone- a proper T12 station

author: RayRay
author_rank: Frequent Contributor
timestamp: April 08, 2022, 09:40:46 pm
content: Yep, definitely mislabeled and not T12, the tips look more similar to the 200M series. Anyhow, AIO stations are generally a hit and miss, and you'd be best getting em seprately. If you need a hot air station, refer to this post:https://www.eevblog.com/forum/beginners/hot-air-station-a-few-tips-for-buying/msg3894902/#msg3894902For a soldering station, I'd recommend QUECOO T12-956 or Bakon BK1000. The first one is very clearly T12 based, while the Bakon uses 200M tips and the VH90 heating element. Both have their pros and cons, but either would serve you well. T12 stations are generally very good, the tips are a bit more affordable than 200M's and have more variety to em, you can find handles that have a shorter tip to handle distance for more precision SMD work, and the fact that the heating element is integrated into the tip means you wouldn't need to worry about the need to replace the heating element somewhere down the line. That said, T12 irons have one key flaw: the heat goes all over the place, and reaches the handle after 6-7 mins (it's not gonna be hot enough to burn your fingers, I've measured 37C with a thermometer on mine) but nvertheless it's a bit of an inconvinence. There are ways to mitigate it though, like lowering the temperature or switching off the station in-between (while you're fidding with wires/components before having another soldering operation I mean) and this is something that is very unlikely to occur with the Bakon due it's design, so take that into considiration.
wanted: microscope with long working distance (>=200mm) - Page 1
Forum section: electronics / general

author: jcmaxwell
author_rank: Newbie
timestamp: March 31, 2022, 05:11:01 pm
content: I am looking for a microscope for rework in a professional lab environment, I can spend around 2000 EUR for it.Most importantly I would need a working distance of at least 200mm, better 250mm. I almost exclusively work on heavy copper PCBs (6 layers 2oz etc.) and often solder them preheated on a hot plate which already consumes 100mm of the working distance.EDIT:I might have chosen some incorrect vocabulary here. Theopticalworking distance would be fine at 100mm to 150mm, but the stand (mechanicalworking distance, if you want) needs to be able to accommodate for the distance consumed by the hot plate arrangement.Further points:boom standmagnification and zoom for wide range of component sizes from 0402 to TQFP-144trinocular with cam would be highly preferred, but not mandatoryavailable to buy in EuropeCould somebody recommend anything?

author: jfiresto
author_rank: Frequent Contributor
timestamp: March 31, 2022, 05:27:36 pm
content: I might look at something like aMeiji Techno EMZ-5H or EMZ-5TRHwith an 0.3X lens (and 252mm working distance) if you want something new, durable and well supported. Will 13.5X maximum, total magnification be enough?EDIT: You can probably use15X ocularsif you need up to 20X.

author: Electro Fan
author_rank: Super Contributor
timestamp: April 03, 2022, 06:48:04 am
content: At the end of this post is an attached chart that gives some working distance info. The post and thread might have some of the other info you are looking for.https://www.eevblog.com/forum/beginners/the-ergonomics-of-microscope-soldering-direct-optical-view-vs-cameramo-257888/msg3332530/#msg3332530

author: KrudyZ
author_rank: Frequent Contributor
timestamp: April 03, 2022, 05:49:32 pm
content: I would recommend something like this:https://www.ebay.de/itm/175195255447?hash=item28ca737297:g:sK8AAOSwUsdiKvIu

author: jfiresto
author_rank: Frequent Contributor
timestamp: April 03, 2022, 07:03:02 pm
content: That looks like a five-step M3C with high eyepoint 10X/21B oculars and an 0.63X objective giving a 149mm working distance and 4, 6.3, 10.1, 15.8 and 25.2X total magnifications. Substituting an 0.32X objective would halve the total magnifications and increase the working distance to 297mm.The double-arm boom stand is really nice until the teflon sleeves wear through. Then you have to lift the microscope and unweight the arms to slide it horizontally. Since it is listed asgebraucht(used), the seller is expected to pay for the return shipping if anything is wrong with it.

author: jcmaxwell
author_rank: Newbie
timestamp: April 06, 2022, 05:57:34 pm
content: Thanks everyone for your inputs. I will probably now order a Leica M60 with 0.8 Barlow lens and the XL stand. I need to spend more than I wanted, but it quality seems to be top notch.
TL866 programmer MiniPrp 6.85 question - Page 1
Forum section: electronics / general

author: Southerner
author_rank: Regular Contributor
timestamp: April 05, 2022, 11:10:24 pm
content: I am using Minipro v6.85 on a Windows 7 box as I understand that is the last Minipro version that will work with my converted TL866CS. I have not used it much but have used it several times in the last few days. Can anyone tell me how to turn off the setting of lock bit as the default programming option? I have no desire to set the lock bit as I do plan to reprogram these chips. Am I reading it right or does setting that lock bit (the default) not set the lock bit fuse so I and others can't reprogram the ATMega328P without having to use a hv programmer to erase them and reprogram them?I hope that the lock that MiniPro 6.85 is giving me is talking about the fuse link for the lock bit. At any rate, how do I turn off that setting so that it is no longer the default setting? What is its function? Is it the lock bit in the fuse links?Thank you.

author: Shock
author_rank: Super Contributor
timestamp: April 05, 2022, 11:18:54 pm
content: Tried saving it as a project? I think the write options get saved there. I don't have it in front of me at the moment unfortunately to test.
Bosch GBA 12v 2.0Ah battery pack - Datasheet - Page 1
Forum section: electronics / general

author: LINACboy
author_rank: Contributor
timestamp: April 03, 2022, 09:48:28 am
content: Hi everyone,I'm looking for a datasheet for theBosch 12V 2.0Ah3S Li-Ion battery pack.Specifically I'm interested in what kind of protective functions are implemented on the internal PCB, their thresholds and what exact action is taken when they are crossed:overcurrent (peak charge / discharge value)overvoltageundervoltag (discharge cut off threshold)overtemperatureOn Aliexpress you can buy knockoffs of the plastic parts and PCB w/o the cells that go by the nameBAT411, BAT412A, BAT413A BAT420 and similar. But I can't seem to find a circuit diagram. Has anyone ever reverse engineered the PCB of either the original or knockoff units?I want to design some portable appliances around this pack (LED-flashlight, USB-powerbank, bar-graph charge indicator, etc.) and would like to know how much additional effort it takes in order not to fry or unnecessarily deteriorate these packs.

author: yelkvi
author_rank: Regular Contributor
timestamp: April 03, 2022, 11:06:52 am
content: These parameters are easily determined experimentally.A piece of nichrome coil, a 12V light bulb and a simple multimeter.Or do you not have the original battery?

author: LINACboy
author_rank: Contributor
timestamp: April 03, 2022, 12:58:24 pm
content: I bought into the Bosch system, so I actually have several. But rn I'm still too cheap to risk destroying one before knowing exactly what is and isn't implemented.For example iirc the Makita LXT 18V system has a micro controller in every pack, which monitors and counts hazardous events (overtemp, imbalance and such). If it detects too many events, it prevents you from recharging w/ an OEM-charger. They also have non-resetable fuse links.I don't think, the Bosch system is that complex. But if someone already did all the legwork or has access to OEM-data, I'd love to benefit from that.
Test equipment that equalizes signals? - Page 1
Forum section: electronics / general

author: mapleLC
author_rank: Frequent Contributor
timestamp: April 02, 2022, 06:59:04 pm
content: I need a piece of test equipment that equalizes incoming signals, or at least allows for measure that can be equalized manually via intervention.The incoming signals are all at different levels, I need balance them out so the outputs are all equal. Comparing 2 would be ok, but it really needs 4 or 6 inputs.Any tools come to mind that I might be able to adapt?

author: TimFox
author_rank: Super Contributor
timestamp: April 02, 2022, 07:08:03 pm
content: You need variable attenuators. See my answer to your other post.
Where to find CHEAP packs (5-10 pcs) of electronics pliers? - Page 1
Forum section: electronics / general

author: blueduck577
author_rank: Newbie
timestamp: March 29, 2022, 01:53:30 pm
content: Aliexpress is littered with these bulk packs of side cutters:https://www.aliexpress.com/item/1005001309345186.htmlI like them because they are cheap and if they break, no big deal. I am trying to find bulk packs of needle nose electronics pliers similar to these. I've been poking around for an hour with no luck. Anybody have any leads?For reference, I mean something like these:

author: bob91343
author_rank: Super Contributor
timestamp: March 29, 2022, 07:27:24 pm
content: I don't know what you mean by cheap, but try these:https://www.allelectronics.com/item/plr-405/4-1/2-mini-linesman-pliers/1.html

author: 5370H55V
author_rank: Contributor
timestamp: March 30, 2022, 06:12:29 pm
content: I've bought a few of these:https://www.edsyn.com/product/CLEARCP/KP157.htmlThey're cheap and have thin noses. Handles aren't the best, but for the price I'll live with it.

author: kripton2035
author_rank: Super Contributor
timestamp: March 30, 2022, 07:42:58 pm
content: this should be what you are searching forhttps://www.aliexpress.com/item/1005002638027415.html

author: kripton2035
author_rank: Super Contributor
timestamp: March 30, 2022, 07:45:00 pm
content: these are better but more expensivehttps://www.aliexpress.com/item/32347626228.html

author: kripton2035
author_rank: Super Contributor
timestamp: March 30, 2022, 07:46:28 pm
content: these are top quality too, but also not cheap.https://www.aliexpress.com/item/4000482894447.html

author: thm_w
author_rank: Super Contributor
timestamp: March 30, 2022, 09:36:46 pm
content: Is it possible you are using the wrong tool for the job?These sidecutters are made for thin copper wire only.

author: tooki
author_rank: Super Contributor
timestamp: March 31, 2022, 05:01:55 pm
content: Quote from: kripton2035 on March 30, 2022, 07:46:28 pm”Top” quality? Come on… much better ones exist. Sure, they cost a lot more, but they do exist.

author: tooki
author_rank: Super Contributor
timestamp: March 31, 2022, 05:03:35 pm
content: Quote from: thm_w on March 30, 2022, 09:36:46 pmIndeed.OP, do you need bulk packs because you’re equipping multiple work spaces (like a classroom)?And why does it matter if they’re bulk packed or not? Bulk packs don’t guarantee a price that’s lower than buying multiple singles.

author: kripton2035
author_rank: Super Contributor
timestamp: March 31, 2022, 06:28:56 pm
content: Quote from: tooki on March 31, 2022, 05:01:55 pm"top aliexpress quality" I should have said...
PACE ST 45 PC90 tips - Page 1
Forum section: electronics / general

author: lavo-1
author_rank: Regular Contributor
timestamp: March 27, 2022, 04:07:27 pm
content: Having trouble getting hold of a spare tip for my aging but forever reliable PACE ST45/ PC90.I don't do much soldering at home anymore as I tend have done enough in my day job to be bothered doing more when I'm home on dry land, but I have been messing about doing repairs on family and friends PC's, HIFI kit and have in the need of a fine tip for some SMD work.I have had a look on Farnell and RS but they are sold in packs of 5 and there doesn't seem to be many stockists about in the UK.Any recommendations or should I maybe buy a cheap Aliexpress JBC knock off?At least I can but tips for them readily

author: Shock
author_rank: Super Contributor
timestamp: March 28, 2022, 04:21:54 pm
content: PS-90 Chisel Tip Kit. P/N 6993-0210