hybridfree/eevblog-posts huggingface dataset:
Looking for Connectors - Page 1
Forum section: electronics / beginners

author: gudenau
author_rank: Regular Contributor
timestamp: May 01, 2018, 11:54:02 pm
content: I was trying to find some connectors on a board that I have so I could make a replacement. I was unable to find some of them, plus I would like to know if the few I did "find" are correct.I would also like some tips for trying to find this stuff out myself, as I am fairly new to finding existing parts without labels.(Also sorry for the bad pictures, the camera app on my phone is not great. No focus control)6x2 pins2mm pitch14mm wide5mm tallSquare pins.5mm largeSeems to be compatible with 455-1763-ND.Flat flex22 contacts1mm pitch27mm wide4mm tall>1mm x ~4mm contactsSeems to be compatible with WM11062TR-ND.Flat flex16 contacts1mm pitch21mm wide4mm tall>1mm x ~4mm contactsSeems to be compatible with WM3391TR-ND.2x1 pins2mm pitch6mm wide5mm tallSquare pins.5mm large3x1 pins2mm pitch8mm wide5mm tallSquare pins.5mm large4x1 pins2mm pitch10mm wide5mm tallSquare pins.5mm largeNote, that is factory gunk.6x1 pins2mm pitch14mm wide5mm tallSquare pins.5mm largeFlat flex with notch51 positionsFlat flex goes in the side with the hinge.5mm pitch36mm wide>.5mm x 4mm contacts1x1mm2notch 1mm from bottom on both sides

author: Monkeh
author_rank: Super Contributor
timestamp: May 02, 2018, 12:20:21 am
content: I'm not familiar with flat flex types so I'll skip those.The others appear to be JST PHD and PH type, although the materials and markings seem a little off. It seems thatSullins,TE, andMolexhave cloned them. Markings and the identity of the other parts seem to suggest the Molex parts.

author: pigrew
author_rank: Frequent Contributor
timestamp: May 02, 2018, 12:58:15 am
content: I don't know for sure, but by browsing Digikey the first one looks most similar to a Sullins SWR204-NRTN-D06-ST-GA.The 2-pin one should be SWR201-NRTN-S02-SA-WH. 3 pin is SWR201-NRTN-S03-SA-WH. Etc...Maybe?

author: Jwillis
author_rank: Super Contributor
timestamp: May 02, 2018, 10:55:39 pm
content: The ribbon ones are FFC/FPC (Flexible Flat Cable)/(Flexible Printed Circuit) connector
Looking for CRT monitor advice GDM-FW900 - Page 1
Forum section: electronics / beginners

author: andym8
author_rank: Newbie
timestamp: January 07, 2013, 05:51:01 pm
content: Greetings, I have come from Dave's excellent youtube channel.I'm hoping to get some information on the workings of my Sun GDM-FW9010 (essentially the same as the more common FW900) and possibly some repair tips.The service manual is availableherefor those interested.I'm aware of the dangers messing with CRTs, please preach of them elsewhere.A little background on it:Currently it does absolutely nothing when powered on.However, originally it would work fine for a period of time but then the screen would go blank. No errors would show and it appeared to continue running as normal albeit without the picture.I measured the voltages from the outputs on the power supply board, G, and found the heater supply falling off after some time. From this I assumed the tube was ok and the problem was on the G board?That's when this tale takes a turn for the worse. Poking around trying to measure voltages I shorted some part of the G board with one of the test leads, I forget where, it was possibly one of the big regulators (it was years ago when I did this), it was certainly in that area anyway.What I would like to know:What parameters control the main power on of the G board? I had assumed IC001 on the N board had ultimate control, but what does it look for inorder to activate it? Should only the 5v standby rail be available otherwise?Many Thanks for any help, Andy.
Looking for data sheet for vm09ac l4950ts - Page 1
Forum section: electronics / beginners

author: Seaofdep
author_rank: Regular Contributor
timestamp: October 07, 2017, 08:03:57 am
content: Hi I'm looking for information on picture linked . Closest datasheet says audio amplifier but not much else . The only one I found for sale was AliExpress for but not sure if it is worth the cost of 15 with a seller that only has one and hardly any info. Is there any other alternatives to replace this, or what are my options thank you for your timethank youSent from my iPhone using Tapatalk
Looking for Datasheet for R2J240 Mcu+Battery Management - Page 1
Forum section: electronics / beginners

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 04, 2017, 06:08:27 pm
content: does anybody has the datasheet for or have access or knowledge about renesas R2J240 mcu + battery management IC? the best i could find is its description, nowhere mentioning which pin is what.. i need which pin is what?https://www.renesas.com/zh-tw/doc/products/linear/r18cs0003ej0200_standardic.pdfand some advertisement...http://archive.eetasia.com/www.eetasia.com/ART_8800556221_765245_NP_534aad52.HTMand someone had to go through the trouble of hacking it, but incomplete...http://www.karosium.com/2016/08/hacking-r2j240-lgc.html

author: katzohki
author_rank: Frequent Contributor
timestamp: October 04, 2017, 07:10:17 pm
content: Looks like you might have to get in touch with Renesas directly and ask them for it.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 05, 2017, 01:06:15 am
content: Do they choose their customers? What is it with them? And then they will push for multi K IDE ?i already asked from supplier by giving away my email

author: katzohki
author_rank: Frequent Contributor
timestamp: October 06, 2017, 04:25:44 pm
content: I don't really know. I've run into a few vendors like this. Realtek was one. They just don't seem to do a good job publishing datasheets. Could be that it's an older part. There was a camera sensor vendor that is pretty notorious for making you sign an NDA to get datasheets, but that's because they think it helps them protect their IP.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 06, 2017, 05:30:05 pm
content: if i need to steal their IP i dont need to ask for the datasheet. i only need a photon microscope and some acids... i guess they are only more interested in big company of consumers' products..
Looking for Design entry HDL tutorial... - Page 1
Forum section: electronics / beginners

author: muthukural001
author_rank: Regular Contributor
timestamp: May 31, 2019, 11:44:17 am
content: Hello All,I want to learn Design entry HDL to draw schematics...I am looking for a formatted document that helps me to create symbols and draw schematics...Please suggest...Thanks,Muthu

author: rstofer
author_rank: Super Contributor
timestamp: May 31, 2019, 01:39:42 pm
content: Google for 'xilinx schematic entry'There are tutorials, videos and papers on the topic. At least one of which says not to use schematic entry. If you use Xilinx tools, you need to use the obsolete ISE because the newer Vivado doesn't have a schematic editor. No problem, really, it just limits your selection of chips to those that are now considered obsolete.I am not into other toolchains so I have no idea what is available.https://forums.xilinx.com/t5/Design-Entry/Schematic-Design-Entry-Tool-in-Vivado/td-p/278260

author: muthukural001
author_rank: Regular Contributor
timestamp: June 03, 2019, 05:13:34 am
content: Hi rstofer,Sorry, I did not state myself clearly...I am asking a tutorial for Design entry HDL(previously concept HDL) from cadence...Thanks,Muthu
Looking for diode info - Page 1
Forum section: electronics / beginners

author: plus6dbE
author_rank: Contributor
timestamp: August 23, 2014, 04:39:51 am
content: I found this press-in diode (see attached pic) in a crusty old power supply that was part of a lot I won at auction. It's an Electro-Technic Products "Model 6000 Variable Voltage Power Supply." I estimate it to be mid-80's vintage. And it looks like someone made some attempt at repairs, to put it kindly(you'll see what I mean if you'd like to check out photos of the teardown - they're in my dropbox athttps://www.dropbox.com/sh/qhmn6kz90b03pqs/AADSRMPHU-oi28Kk6WjxBExPa?dl=0). This thing interests me because I've never seen a variable transformer like the one used here that has a plate that is connected to the control knob and brushes along the windings as the operator turns the knob in order to vary the output voltage.Anyway, I have had no luck so far trying to find some info about the pair of diodes. The mark looks like it says "5L11N 207".Any ideas about whether it's feasible to track down info on an old diode like this, and if so, where to look?

author: SeanB
author_rank: Super Contributor
timestamp: August 23, 2014, 05:41:30 am
content: I would not even bother but just replace it with a 25A 800V bridge rectifier mounted on the heatsink plate, and only connect the 2 AC wires and then the output is taken from either the + or - lug, depending on how the diodes are connected as either stud anode( most common so + lug ), or stud cathode so - lug. That will work.

author: plus6dbE
author_rank: Contributor
timestamp: August 23, 2014, 03:01:14 pm
content: This box has AC output straight off the transformer, and DC output is just passed through a 1/2 wave rectifier (these two diodes). Pretty simple but doesn't look very efficient to me.I haven't decided what to do with this thing yet (fix it up or scrap it), but I had never seen these press-in diodes before so I was just curious about them.

author: SeanB
author_rank: Super Contributor
timestamp: August 23, 2014, 03:29:29 pm
content: You never took an alternator apart? there are 6 in there, or in the more modern ones 2 steel plates with the diodes in little pits with some gunk sealing them in so only a lead wire protrudes.

author: plus6dbE
author_rank: Contributor
timestamp: August 23, 2014, 03:43:28 pm
content: Quote from: SeanB on August 23, 2014, 03:29:29 pmnah, on the few occasions where I've had to replace an alternator I've always turned in the old one for the core refund

author: SeanB
author_rank: Super Contributor
timestamp: August 23, 2014, 08:45:31 pm
content: Generic one new is $40, so you could even go to Autozone in the US and ask them if they have any old ones.
Looking for Dual Port USB Charger Solution - Page 1
Forum section: electronics / beginners

author: Freshman
author_rank: Regular Contributor
timestamp: June 04, 2025, 06:47:35 pm
content: I need some help with a design I'm planning to work on — a USB dual charger that supports:USB Type-A: 5V @ 3AUSB Type-C: 5V @ 3A, 9V @ 3A, 15V @ 3A, 20V @ 3.4A (PD support)I've been searching for reference designs or ICs that support both Type-A and Type-C outputs. The closest I found so far is this from Microchip: EA72M20A Development Tool – Microchip (https://www.microchip.com/en-us/development-tool/EA72M20A)My question:Is there any existing IC or reference design that meets all of the above requirements for both ports?If not, I'd appreciate any guidance on selecting the right ICs to build this from scratch.

author: ahsrabrifat
author_rank: Regular Contributor
timestamp: June 05, 2025, 07:27:15 am
content: I think you'll have to design your circuit using multiple ICs for different functions. You cannot achieve your goal with a single IC.

author: Freshman
author_rank: Regular Contributor
timestamp: June 05, 2025, 07:43:44 am
content: Any IC suggestions?

author: Benta
author_rank: Super Contributor
timestamp: June 05, 2025, 10:31:55 am
content: Those can be bought by the cartload at the local phone pusher.
Looking for electronics-PCB training - Page 1
Forum section: electronics / beginners

author: ZotDitzMyo
author_rank: Newbie
timestamp: October 04, 2012, 11:46:38 am
content: I come from a software background and have a HUGE interest in electronics.I completed my first professional embedded project to date (pfft, Arduinos!) and did a bit of component selection, circuit design and soldering. What I am missing in the chain is the PCB layout (that is not to say that I am extremely proficient in other areas!).Since this is all in a work environment, and we have credits for training, I am looking for training in at least PCB layout (theory + tools) and maybe some more circuit design stuff. It's not as easy to locate companies offering training in these areas as it is for software development. Would anyone have any recommendations at all? Especially if located in the Northeast American continent. In my context, I would need a "recognized" training facility/consultant with fees and everything...I am not sure which EDA package is used in-house but am pretty confident it's not Eagle, Altium or the likes...What would be neat is to try one of the Cadsoft Training partners, a certain David L. Jones somewhere in Australia, but it's not all that practical :-)Thank you!

author: David_AVD
author_rank: Super Contributor
timestamp: October 04, 2012, 09:10:44 pm
content: PCB layout is something of a more slowly learned skill in my opinion.You need to know how to "drive" the CAD software effectively of course, but a big factor is the knowledge of where to place the parts and how to to route them.I look back at my really early designs and can see a huge difference to my latest ones.

author: free_electron
author_rank: Super Contributor
timestamp: October 04, 2012, 09:13:26 pm
content: IPC training is the way to go. they deliver official certificates too. If the company is willing to shell out for it , go for it !
Looking for equipment to solve a problem - Page 1
Forum section: electronics / beginners

author: jeryst
author_rank: Newbie
timestamp: April 26, 2017, 03:19:04 pm
content: Hi. My name is Jerry, and I am new to the site.I have a question about off-the-shelf thermal imaging hardware (camera, meter, etc)in regards to a problem I am tasked with solving. I have no training or experience inthermal imaging and am looking at this as one of several potential means of devising a solution..I am sorry that I can not give specifics, but I canoffer enough information to provide a proper scenario.Let us imagine that something is buried underground, and that above this object,there is a one degree temperature difference from the ground not directly over theobject.My question is this: Is there any currently availabe equipment that is sensitive enough todetect the one degree difference, or has adjustable sensitivity that could be adjusted todetect that small of a difference? The ideal situation, would be that the area above the object wouldstand out from the surrounding area.I have been trying to look at different equipment and have been unable to determinewhich could be used. Perhaps, because of my lack of experience, I am just overlookinga specification or rating that provides this information, so any insight would be greatlyappreciated.

author: Jono427
author_rank: Contributor
timestamp: April 26, 2017, 03:32:26 pm
content: You might want to try looking in this section:https://www.eevblog.com/forum/thermal-imaging/

author: CatalinaWOW
author_rank: Super Contributor
timestamp: April 26, 2017, 03:39:51 pm
content: Commercially available imagers can easily discern temperature differences much less than 1 degree kelvin, and most can adjust this sensitivity. There are other questions you will want to ask yourself. How far away do you wish to make this observation. Apparent delta T drops with distance (rate it drops depends heavily on atmospheric conditions). The size of the region which has a contrasting temperature and the size of the region you are searching is also important. In general you will want a sizable number of pixels to fit on the warm region, with is determined by the resolution of the camera (pixel size in milliradians, in turn determine by lens choice and other things).Lots of choices that depend on the details of your scenario.
looking for faulty cells - Page 1
Forum section: electronics / beginners

author: m3vuv
author_rank: Super Contributor
timestamp: April 29, 2022, 08:29:29 pm
content: Hi all,i have a homebrew ebike with a 10p13s battery,its made with standard lithium ion 15q samsung cells,i have a smart bms hooked upto it,a few weeks ago one bank would only charge to about 3.8 volts max,i just renewed the 10 cells in that bank and its now fine,I wondered if it had a faulty cell in that group,if so would the charge into a bad cell just turn into heat in that bank?,I have just brought a tenma ir thermometer,if i have an iffy cell would the tenma show it up when charging.the pack is fine now ,But i have the feeling not all 10 cells in that group were bad.TIA.

author: metrologist
author_rank: Super Contributor
timestamp: April 29, 2022, 08:42:57 pm
content: You have to test the cells individually. Sometimes they will act like loads and get warm and sometimes like opens...Constant current down to threshold voltage, measure mah. I compare both directions

author: m3vuv
author_rank: Super Contributor
timestamp: April 29, 2022, 10:23:29 pm
content: i understand that but with the groupe i assume it was one cell gone leaky sort of semmi s/c,not letting the rest in the groupe charge fully,if that was the case i was hoping i could spot the faulty cell by a rise in temp as the pack was connected to the charger so i could just remove the single cell for testing,that was my idea,is it viable?
Looking for Feedback on My First PCB - Page 1
Forum section: electronics / beginners

author: Dan9550
author_rank: Contributor
timestamp: November 02, 2020, 12:43:33 am
content: So i took it upon myself to learn KiCAD last weekend and design a simple adapter PCB for a serial GPS module. The board simply has a female header on the bottom and male header on top to attach the GPS module, along with extra holes for breakout of other serial pins should they need to be used for other applications.I've got the prototypes on the way so hopefully there is nothing obviously wrong that i haven't noticed but since its my first PCB I'm after any feedback.

author: Guy Shemesh
author_rank: Contributor
timestamp: November 02, 2020, 12:54:05 am
content: Hi,I'm sorry, I didn't have time to go over your gerbers, so based on your picture alone I can see the silk probably needs more clearance from the copper areas. This is because you also have the solder mask layer and there is a registration tolerance between cooper and s.m of about +-3mil. Your manufacturer knows better at he applies certain rules to trim your silk so it is not spilled over the copper or outside of the s.m and the end result is usually trimmed silk layer.So for next time, have more spacing between the silk and the nearest exposed copper.Second, I see some copper pour with reliefs that probably doesn't do much. It not bad but probably not helpful either...Overall for first board it's nice,Good luckGuyePiccolo Engineering

author: S. Petrukhin
author_rank: Super Contributor
timestamp: November 02, 2020, 06:45:05 am
content: I think you forgot the mounting holes

author: Dan9550
author_rank: Contributor
timestamp: March 16, 2021, 04:33:52 am
content: Update on this for closure to the few humans who read this.The PCB was almost perfect!* Fitment was as designed.* Connections were perfect.* Yellow colour was pleasing to the eyeballs.Doing this again i would* Revamp the silkscreen to make it more ledgable.
Looking For Component "Game Controller Triggers" To Purchase - Page 1
Forum section: electronics / beginners

author: ThePie
author_rank: Newbie
timestamp: December 10, 2018, 01:07:17 am
content: Hello,I am trying to find the below part. Does anyone know where I can get such a thing or something similar?https://www.sparkfun.com/products/retired/10314Thanks.

author: ThePie
author_rank: Newbie
timestamp: December 12, 2018, 05:48:02 am
content: Bump

author: Jwillis
author_rank: Super Contributor
timestamp: December 12, 2018, 08:06:35 am
content: If you can get the dimensions and ohm value of the potentiometer you might be able to fix it. Bourn has bushingless pots what appear to be around that size .Try Mouser or Digikey .What game controller is it for.

author: ThePie
author_rank: Newbie
timestamp: December 13, 2018, 05:33:44 am
content: Was looking for Xbox 360 style, but could do Xbox One style. It's for a custom built controller. I've seen a lot of potentiometers but what I'm focused on is the actual plastic pieces. Even if I could get a 3D model of the plastic pieces that would be helpful. Just having the potentionmeter is only a portion of what I need.

author: Jwillis
author_rank: Super Contributor
timestamp: December 13, 2018, 05:54:51 am
content: Found thishttps://www.ebay.com/itm/Full-Housing-Shell-Case-Mod-Kit-Button-Parts-for-Xbox-360-Wireless-Controller/262588784105?hash=item3d2382dde9:m:mUD2b1S1KSatYX2H97KDlfg:rk:48:pf:0Looks like the kit includes the switch mounts your looking for.
Looking for green, ruled ESD mats (in various sizes) - Page 1
Forum section: electronics / beginners

author: Electro Fan
author_rank: Super Contributor
timestamp: June 22, 2017, 03:23:16 am
content: I've seen some posts of what appear to be green, ruled (with lines/grids), ESD benchtop mats, some that might be suitable for soldering surfaces, but I haven't found a good source (in the U.S.). Anyone have any specific model or supplier recommendations? Thx

author: karkoon
author_rank: Contributor
timestamp: June 22, 2017, 03:27:55 am
content: These are called cutting mats.Typed with thumbs.

author: karkoon
author_rank: Contributor
timestamp: June 22, 2017, 03:38:31 am
content: ANSIO A1 Double Sided Self Healing 5 Layers Cutting Mat Imperial/Metric 36 Inch x 24 Inch / 90cmx 60cm (Green / Green)https://www.amazon.in/dp/B010VVQI9O/ref=cm_sw_r_cp_api_i_AUZszbWPC6B71Typed with thumbs.

author: rdl
author_rank: Super Contributor
timestamp: June 22, 2017, 04:45:20 am
content: I don't think cutting mats are going to be static safe. I can't remember ever seeing an actual ESD mat with lines or printing of any kind.

author: poorchava
author_rank: Super Contributor
timestamp: June 22, 2017, 05:06:53 am
content: As far as I know, the green cutting mats are self healing, but not resistant to typical soldering temperatures and not static safe. ESD mats are usually resistant to soldering heat and obviously static-safe, but not self healing (those are usually blue)

author: karkoon
author_rank: Contributor
timestamp: June 22, 2017, 08:31:55 am
content: Any links for those mats?Typed with thumbs.

author: poorchava
author_rank: Super Contributor
timestamp: June 22, 2017, 09:57:30 am
content: http://www.ebay.com/sch/i.html?_odkw=esd+mat&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xantistatic+mat.TRS0&_nkw=antistatic+mat&_sacat=0

author: karkoon
author_rank: Contributor
timestamp: June 22, 2017, 12:10:51 pm
content: Thank you so muchTyped with thumbs.

author: Electro Fan
author_rank: Super Contributor
timestamp: June 22, 2017, 10:29:35 pm
content: We're pretty sure there are no ESD mats that are high temperature resistant and that also have line/grid markings?

author: jsi
author_rank: Regular Contributor
timestamp: June 24, 2017, 10:40:58 pm
content: I'm using my wife's old green cutting mat on my work bench. It is most definitely not soldering iron proof. But, it is tough and protects the table top from my projects. The price was right, free, and I'd still like to replace it someday with a legit ESD mat.
Looking for header pin connectors - Page 1
Forum section: electronics / beginners

author: Zamagen
author_rank: Newbie
timestamp: June 05, 2020, 08:28:46 am
content: Hello,I have to mate a small daughterboard PCB to a main PCB which has 2 rows of female contact strip (tulip type/round holes strip of contacts).I tried to use a normal male/male round pin contact strip, but the problem with that is that the assembled sandwitch (mainPCB-female connectors-male connectors-daughterboard PCB) is too tall and doesn't fit anymore.The simplest solution is to remove the female contacts and directly solder the male/male contacs to both PCBs, but I need the assembly to be easily disassembled.I've tried to find some round male/male pin stripes with a smaller profile, but there doesn't seem to exist, the only other possible solution would be something similar to this:I.e. single pins with a profile that will fit into tulip holes...But I can't find them.Can anyone please tell me how they are called and possibly give me an ebay/ali shop/manufacturer reference?Thanks in advance!

author: tooki
author_rank: Super Contributor
timestamp: June 05, 2020, 02:42:52 pm
content: I assume that by “tulip style” you mean machined (turned) pins and sockets?Take a look at Mill-Max. They make a gazillion types, including sockets that mount directly into the board, so it’s nearly flush. I suggest browsing the full PDF catalog rather than clicking through the website.Also, even with regular square headers, you can get “bottom entry” female headers that go on thereverseside of the board, so the pins go through the board and then into the socket, allowing much lower board distances.
Looking for Heath 4554 Manual - Page 1
Forum section: electronics / beginners

author: lperthel
author_rank: Newbie
timestamp: August 08, 2015, 07:20:55 am
content: I just bought a Heath (not Heathkit) 4554 oscilloscope and cannot find the manual online. It appears that Heath is no longer around. Does anyone know of an online database that I could use to access the Heath manuals?Thanks

author: oldway
author_rank: Super Contributor
timestamp: August 08, 2015, 08:14:45 am
content: http://www.pestingers.net/Pages_images/Heathkit/Test_equipment/Oscilloscopes/SO4552_54.jpgIt seems to be a rebadged low end chinese oscilloscope.
Looking for help with a part... - Page 1
Forum section: electronics / beginners

author: webtop
author_rank: Contributor
timestamp: February 26, 2020, 02:49:43 am
content: ...either through part number identification or by what the part is doing.I have a Hampton Bay fan in my bedroom that I'd like to control with an Amazon Alexa. I've added ESP8266 modules in other devices and had no issue so far, but this one has me puzzled.The chip in question has no manufacturer marking, and is labeled as: Line 1: RH7607-2(WB), Line 2: 5B1HHEThe fact that the board it's on is a Rhine UC7067RC makes me think they program their own chips, and I might need a logic analyzer to see what's going on.I'm thinking that if I cannot find any info on the chip, that I wire it up the pins and use the remote control to switch between the high, medium, low fan modes and see what goes high, then add an ESP8266 to pull them high based on my instruction to Alexa.In the image there is a part I had to remove to get the heatsink off, and that's a BTA12 from ST, which I know can be use in appliance motor circuits, so maybe my attention should be more on that guy, although I'm thinking that high current and a good idea to stay away from for a beginner.Thank for any, and all, commentsPaul

author: webtop
author_rank: Contributor
timestamp: February 26, 2020, 11:40:11 pm
content: Interestingly I came across a couple of voltage regulators near and attached to this IC, but what's unusual (to me) is that they are negative voltage:https://pdf1.alldatasheet.com/datasheet-pdf/view/139341/FCI/LM79L05.html

author: Jwillis
author_rank: Super Contributor
timestamp: February 27, 2020, 04:00:05 am
content: Tough one . Could be a programmable chip or a custom chip. Like you I couldn't find any info on it. There should be an IR receiver some where on the circuit board so I would start there to adapt a WiFi or Bluetooth . I don't know what Alexia uses for communication. You would have to know what output pulses mean that are coming from the remote. Maybe send a signal to a Bluetooth or WiFi receiver to a decoder to the IR input of the fan circuit ? oOptocoupler? Just a thought .

author: webtop
author_rank: Contributor
timestamp: February 28, 2020, 03:59:18 pm
content: Yeah, I noticed that the receiver has a pin marked OUT, so I'll see what's going on there as I use the controller, then maybe replace that completely with an ESP8266 which I can have send the same signal.I don't think it'll be a difficult conversion, just thought maybe someone had already done this. As it doesn't look like it, I'll write up an article on it when I'm done.
Looking for info on buck convertor chip. - Page 1
Forum section: electronics / beginners

author: georgedone
author_rank: Contributor
timestamp: April 29, 2023, 11:17:31 am
content: Hi !I am trying to repair a power supply from an Ubiquiti EdgeSwitch 48 Lite. The PCB is marked AC_DC_PWR_56W, most likely should output 25V, 2.25 Amps.I checked the obvious like the Slow Blow fuse and the rectifier bridge.Anyway, in order to troubleshot further I am looking to identify first the buck convertor chip.This is a SOT23-6 chip marked ROP 36S AD.Pin 1 is marked with a dot (most such chips have a band). Also the GND is connected to pin 1 (closest to the dot) and feedback from the optocoupler is connected to pin 2. Most such power chips have GND on pin 2. I was wondering how I can identify which chip is it and find an example circuit with it.

author: Jwillis
author_rank: Super Contributor
timestamp: April 29, 2023, 08:29:14 pm
content: Can you give a picture and a rough schematic?I thought it might be something else but you say its 6 pin.

author: Jwillis
author_rank: Super Contributor
timestamp: April 29, 2023, 08:57:44 pm
content: Just with the description of the pins. I come up with 5 possible candidates that have the SOT23-6 package.

author: georgedone
author_rank: Contributor
timestamp: April 30, 2023, 03:48:24 am
content: Thank you for your answer, I will take photos and make a rough schematics tomorrow. The chip is consistent in pinout with one of the Richtek chips, for example RT7736, possibly not a Richtek chip but a close enough clone.

author: georgedone
author_rank: Contributor
timestamp: April 30, 2023, 04:30:51 am
content: Photo of the SMPS chip

author: james_s
author_rank: Super Contributor
timestamp: April 30, 2023, 04:34:35 am
content: I see a several really questionable looking solder joints there, you might try reflowing those first.

author: georgedone
author_rank: Contributor
timestamp: April 30, 2023, 04:42:21 am
content: It certainly looks like that and to be be sure I will touch some of the joints with my iron and some flux but on the foto it looks far worse that in reality.In the primary there are 2 Wayon WML11N65CD power mosfets with the source and drain connected together but gates are each connected to the SMPS controller chip GATE pin via a separate resistor + diode for each mosfet. The joints which appear in the foto as cold belongs to one of those mosfets.

author: Jwillis
author_rank: Super Contributor
timestamp: April 30, 2023, 07:23:30 am
content: I'll throw these down to start.Kind of leaning to OB2263, OB2262https://datasheet.lcsc.com/lcsc/1806051718_OB-On-Bright-Elec-OB2263AP_C78579.pdfor one of the 2 Chip Rail PWM CR6850 or CR6853. Compatible with On Bright OB2263, 2262 and SG5701 and so on.http://micric.ru/data/documents/cr6853_chip-rail.pdfBecause these tend to be the most common.The Max 1522, 1523, 1524 not so commonhttps://www.analog.com/media/en/technical-documentation/data-sheets/max1522-max1524.pdfPossibly NCP12510https://www.onsemi.com/pdf/datasheet/ncp12510-d.pdf
Looking for LED with wide viewing angle - Page 1
Forum section: electronics / beginners

author: AussieBruce
author_rank: Regular Contributor
timestamp: October 10, 2022, 07:42:27 am
content: Google has failed me on this, nothing but residential lighting and wide screen TVs. I'm after an LED light source which will remain relatively bright when viewed from a wide range of angles, say about 60 degrees from frontal in all directions. Like a small incandescent bulb, which wouldn't work btw because short (15mS) flashes are involved. Supply can be up to 9 volts, with suitable current limiting if needed.I could rig up multiple LEDs in series, but would like a single device for aesthetic reasons.Is anyone aware of a type or source, only a very small number needed.

author: connectTek
author_rank: Regular Contributor
timestamp: October 10, 2022, 07:49:21 am
content: https://www.ledsales.com.au/index.php?main_page=index&cPath=148_151_260

author: Infraviolet
author_rank: Super Contributor
timestamp: October 10, 2022, 09:45:23 pm
content: I think SMD LEDs often have quite a wide viewing angle, 0805 sized ones for example. The box like shape seems to encourage LED manufacturers to make them wide angle, whereas the dome shape of through hole T-1 3/4 style LEDs seems to encourage designs which focus the light in to tighter cones with thinner viewing angles, with far lower light intensity the further off axis you go.A lot of websites let you order by viewing angle:https://uk.rs-online.com/web/c/displays-optoelectronics/leds-light-emitting-diodes/leds/?pn=1&sortBy=Viewing%20Angle&sortType=DESChttps://uk.farnell.com/w/c/optoelectronics-displays/led-products/standard-single-colour-leds-under-75ma/prl/results?sort=adf_f1002356_bv|1

author: JustMeHere
author_rank: Frequent Contributor
timestamp: October 11, 2022, 06:31:16 am
content: Digikey is a far better place to start your search than Google.

author: james_s
author_rank: Super Contributor
timestamp: October 11, 2022, 07:09:39 am
content: What color are you looking for? If you want white, what color temperature? How high CRI do you need?

author: Terry Bites
author_rank: Super Contributor
timestamp: October 11, 2022, 07:11:51 pm
content: Sifting the sh** out of google searches is getting harder.

author: SmallCog
author_rank: Frequent Contributor
timestamp: October 12, 2022, 01:42:00 am
content: If you're after through-hole LED's a search term you may wish to try is "straw hat"These are the wide angle LED's used in christmas/fairy lights so that they can be seen from all different anglesThis isn't what they're called on the likes of e14 (if they're even available there) but it should find you some on the likes of ebay

author: Wallace Gasiewicz
author_rank: Super Contributor
timestamp: October 13, 2022, 11:56:26 am
content: If you have "clear" LED plastic package, sand them with fine sandpaper to get a frosted package. That helps a lot with diffusing the light.

author: LaserSteve
author_rank: Super Contributor
timestamp: October 13, 2022, 03:23:32 pm
content: A Lambertian led is what you may be looking for.Steve
Looking for low temperature version of the module - Page 1
Forum section: electronics / beginners

author: proshenn
author_rank: Newbie
timestamp: May 30, 2014, 03:00:29 am
content: Hello I'm looking Artysen Embedded Technologies AM80A-300L-120F18-T (cold version) moduleWill the all-new model is there?, Or instead of models available? Thank you for your reply
Looking for Low V 1-2V high current >10A SCHOTTKY. Any suggestions? - Page 1
Forum section: electronics / beginners

author: sekharnet
author_rank: Newbie
timestamp: December 25, 2013, 03:13:35 pm
content: I am looking to buy a low voltage 1 to 2 volts and high current (above 10A) SCHOTTKY Diode.Any suggestions which website I can get them for a lower cost.I have a DC source generating high current at low voltage and want to stop reverse currents, if any one wondering what the SCHOTTKY is for,Thanks

author: Kevin.D
author_rank: Frequent Contributor
timestamp: December 25, 2013, 03:58:04 pm
content: How low do you want the Vf drop to be ?. You can use a reversed D-S Mosfet to act as a very low Vf drop diode ( a few m ohms on resistance) in many situations .(P chan in high side or N chan in gnd side).

author: tszaboo
author_rank: Super Contributor
timestamp: December 26, 2013, 05:04:18 pm
content: Quote from: sekharnet on December 25, 2013, 03:13:35 pmThe problem is that the schottky would dissipate 10-20W. So even if you find one which is rated for 10A, it still needs to have high enough dissipation and cooling. That means TO220 package at least, with a heatsink at least 5-10K/W. And a SCH like that will not be cheap, I know, because I have a constant search for them for the same reasons.If your design can tolerate MOSFET, consider using them. A little guide:http://nandblog.com/reverse-power-supply-connection-circuits/

author: digsys
author_rank: Unknown
timestamp: December 26, 2013, 11:49:41 pm
content: Quote from: sekharnetIf you seriously don't want to waste V or E, then something like -www.linear.com/product/LTC4412are the way to go.There are a few variants in this type of device and they work extremely well. Just an option.
Looking for M83C154H-C07 datasheet or pinout - Page 1
Forum section: electronics / beginners

author: ElektroQuark
author_rank: Unknown
timestamp: December 06, 2013, 01:25:33 pm
content: Any link? I can't find any

author: free_electron
author_rank: Super Contributor
timestamp: December 06, 2013, 03:19:48 pm
content: That is an OKI mask programmed cpu. Basically a 80c154 or 87c154Try under those numbers.

author: ElektroQuark
author_rank: Unknown
timestamp: December 06, 2013, 09:35:26 pm
content: Thank you. Looking for them...
Looking for mate for kostal connector 9444044 - Page 1
Forum section: electronics / beginners

author: wrinklehead
author_rank: Contributor
timestamp: January 22, 2019, 08:33:37 pm
content: Looking for a mate forthisconnector. I have tried browsing mouser/digikey etc for a connector thats male and 4 positions from the same manufacturer but I cannot find anything. I have also searched for a datasheet or similar to see if a mating part is listed. While I did find a product cataloghereI did not see anything that looked correct there.Can anyone help or give advice of how to find this particular connectorThanksJason
looking for module to monitor power consumption @110v  - Page 1
Forum section: electronics / beginners

author: sairfan1
author_rank: Frequent Contributor
timestamp: July 07, 2022, 03:55:27 pm
content: I have few devices plugged into mains they can consume from 50w to 250w individually and there are 6 such devices installedI'm looking for cheap module (like from aliexpress) to help me monitor consumption to estimate total power consumption in a period of time, if module can log the data that would be a plus.Can someone advise such module? I do not need very high accuracy just need estimates.

author: Stray Electron
author_rank: Super Contributor
timestamp: July 07, 2022, 04:08:31 pm
content: Harbor Freight in the US used to sell a Kill-a-Watt module that worked pretty well and only costs about $9.99 back ten or so years ago. I expect the Amazon sells something similar. I would buy from one of those instead of Alli where you have no recourse if it fails.I just looked and they still have it. The new "retail" (LOL!) price is now $26. Only a fool buys anything at HF for the "Retail" price.https://www.harborfreight.com/kill-a-watt-electric-monitor-93519.html

author: Bud
author_rank: Super Contributor
timestamp: July 07, 2022, 04:41:17 pm
content: That is not a module though, it is a device that needs to be plugged in to the wall socket.Some time ago i was looking for a power/current monitoring module that i could attach to the power panel and i could not find one. The best way to me was to buy current sensors/transfirmers and connect them to an ESP32 module that could be accessed thru WiFi.

author: sairfan1
author_rank: Frequent Contributor
timestamp: July 07, 2022, 08:25:27 pm
content: My mains power cable is 3 in one, long ago i saw an extension to separate them for a clamp meter, do you know the name of that extension? that's how I will be able to use safely clamp meter or sensor

author: Benta
author_rank: Super Contributor
timestamp: July 07, 2022, 08:37:24 pm
content: A current clamp meter will not show the power consumption, which is dependent on power factor and distortion. Not a good solution unless you're certain that your load is purely resistive.
Looking for New Tools and Software for Electronics Integration Engineering - Page 1
Forum section: electronics / beginners

author: EliOhana101@outlook.com
author_rank: Newbie
timestamp: February 22, 2025, 07:21:18 am
content: Hello everyone,I’m an electronics integration engineer, and my work mainly involves tasks such as designing connector harnesses, calculating voltage drops, and creating block diagrams. I’m currently looking for new tools, software, or even ideas that can help me improve and streamline my work in these areas.Any suggestions, recommendations, or insights on useful tools or resources would be greatly appreciated!Thank you in advance!

author: jumpstart
author_rank: Newbie
timestamp: February 25, 2025, 07:26:27 pm
content: Check out Rapid Harness. They have a free version you can try. License is somewhat expensive, but I have found it easy to learn and has saved me a lot of time.https://rapidharness.com/
Looking for old verification manual - Page 1
Forum section: electronics / beginners

author: cAmper
author_rank: Newbie
timestamp: June 12, 2023, 10:29:42 pm
content: G'day, hope you guys have a secret technical vault unbeknown to sales reps - I am trying to get a hold of a 320A Service Manual specifically listed in the users manual as:Phase Matrix 320A/326A/346A Service Manual (Phase Matrix P/N 5585494-01)I tried sales@phasematrix who were unable to help me and I couldn't find anything elsewhere in my searching. Is there any other websites you guys use that just has copies of a bunch of technical documents?Was going to post in Metrology but don't know the etiquette.Cheers,Dom
Looking for online shops - Page 1
Forum section: electronics / beginners

author: Belrmar
author_rank: Regular Contributor
timestamp: February 04, 2018, 09:34:19 am
content: I have been wanting to buy some higher precision stuff for some proyects, but sadly my budget is not precisely large and most websites as mouser, digikey,element14 have some outrageous shipping fees for my budget....Anyone knows any page that uses a slower but cheaper shipping method?

author: Signal32
author_rank: Frequent Contributor
timestamp: February 04, 2018, 09:40:10 am
content: What exactly are you looking to buy ?

author: Belrmar
author_rank: Regular Contributor
timestamp: February 04, 2018, 10:09:01 am
content: mainly some precision amps and chopper opamps, high accuracy resistors, some good 10 turn pots, a .1% voltage reference, a nice DAC... some power linear fets

author: llkiwi2006
author_rank: Regular Contributor
timestamp: February 04, 2018, 11:41:38 am
content: Digikey and similar websites usually have free shipping above $50 or so. Since you are looking for some fairly precision (hence expensive) stuff, why not just buy enough in one go that you get the free shipping?

author: Belrmar
author_rank: Regular Contributor
timestamp: February 04, 2018, 12:05:54 pm
content: Quote from: llkiwi2006 on February 04, 2018, 11:41:38 amWell as i mentioned my budget is pretty low , and the import taxes on Spain bring the price to near 75 € or 60€ if not imported

author: janoc
author_rank: Super Contributor
timestamp: February 04, 2018, 01:50:28 pm
content: Mouser & Farnell (Element 14) ship from EU warehouses, so you shouldn't have any import taxes, only VAT to pay. Also check whether Radiospares/RS Components has a Spanish subsidiary - they have free shipping if you order on weekends.Digikey ships from the US and insists on using UPS, so there the taxes and fees are a major pain - avoid if at all possible.
Looking for proto QFN board - Page 1
Forum section: electronics / beginners

author: mathk
author_rank: Contributor
timestamp: March 14, 2013, 01:38:26 pm
content: I am looking for prototype board for 20-QFN footprint.Here is the chip:Si4712/13-B30The footprint does not look quite regular QFN package since there is some pad at each corner.I have look at sparkfun digikey and farnell but did not found the appropriate proto-board.Thanks for the help

author: micro_freak
author_rank: Contributor
timestamp: March 15, 2013, 01:05:16 am
content: unfortunately, the link you posted does not work for me, so I can't see the actual chip.Have you tried to find some from vendors like Abra, they sell schmart boards, or perhaps on Ebay? other?

author: johnboxall
author_rank: Unknown
timestamp: March 15, 2013, 01:12:08 am
content: Tryhttp://www.proto-advantage.com/store/

author: mathk
author_rank: Contributor
timestamp: March 16, 2013, 12:03:43 am
content: Thanks both for you answer. I have also update the link in the post so you may now be able to look at it.

author: melonstorm
author_rank: Newbie
timestamp: March 16, 2013, 12:26:53 am
content: I can't really help, buthere's the datasheetif anybody wants to take a look at this.

author: Smokey
author_rank: Super Contributor
timestamp: March 16, 2013, 01:17:21 am
content: Make your own proto-board..... built into your first prototype! The recommended land pattern is on page 37 and the sample application circuit from the data sheet looks pretty simple. Breadboards are so 20th century
Looking for replacement motor overload protector for 1hp induction motor - Page 1
Forum section: electronics / beginners

author: MiscMan
author_rank: Newbie
timestamp: April 07, 2014, 06:50:46 pm
content: I have a customer with a 1 HP HondaWSP100 pumpand the overload protectors seems to have crapped out on the inside. These parts don't seem to be available from Honda (its not on the parts breakdown, and the tech I talked to seemed pretty surprised to hear me asking about this).So it has two of these hooked in series, they are made byElectrica, but I can't them for sale.They basically look like what you can see in the Electrica link, but there isn't a reset button because this would be sealed inside the pump.I think the part numbers for the two are:T 0668/D0 S011T 0644/52 004SI've checked Digikey and Mouser and didn't see anything looking similar to these guys, so are these just really unusual to buy individually? Or am I calling it the wrong thing?Worst come to worst if I can't find anything the customer is planning to hard wire the motor and just let it run until it dies.

author: johansen
author_rank: Super Contributor
timestamp: April 07, 2014, 07:05:59 pm
content: I have a self resetting unit that is likely similar.there are two elements in it, one is for running the motor on 240, it remains connected when you rewire the motor for 120, running the second coil in parallel through the second element, inside is a thermal snap disk that forms a circuit breaker.they rarely fail.I replaced the failed start switch on my neighbors pump with the PTC start "switch" off of a refrigeration compressor.said failed start switch was why the motor was failing to start and why the thermal circuit breaker was repeatedly tripping.. the motor was also about 150C.

author: SeanB
author_rank: Super Contributor
timestamp: April 07, 2014, 07:07:42 pm
content: Thermal overload units. Go to your local refrigeration or white goods repair wholesalers and ask for them. They are normally used in airconditioners and fridges to protect the compressor from overheating or overcurrent.