hybridfree/eevblog-posts huggingface dataset:
Help ID strange bulb - Page 1
Forum section: electronics / beginners

author: THATguy
author_rank: Regular Contributor
timestamp: February 13, 2019, 11:21:39 am
content: Pulled from Kitchen Jug (boiling water).Think it might be Halogen, strange 2 bars with no filament (I believe it is functional).

author: Andy Watson
author_rank: Super Contributor
timestamp: February 13, 2019, 11:27:45 am
content: Looks like a neon ... complete with current limiting resistor in one leg.

author: Psi
author_rank: Super Contributor
timestamp: February 13, 2019, 12:11:25 pm
content: Definitely a neon

author: 6PTsocket
author_rank: Regular Contributor
timestamp: February 13, 2019, 12:16:18 pm
content: Correct. Probably an NE2 like this one on ebay for $1.28.Sent from my SM-G900V using Tapatalk

author: 6PTsocket
author_rank: Regular Contributor
timestamp: February 13, 2019, 12:27:44 pm
content: Right. Looks just like this NE2 on ebay for $1.28. A similar one with a screw base was an NE51. They are current devices, just like leds. The drop across the bulb is around 65 volts as opposed to the 2 or 3 volts of an led. Unkike an led, they are not polarised and work on in both halves of the AC cycle. When they get old they start to flickerSent from my SM-G900V using Tapatalk

author: THATguy
author_rank: Regular Contributor
timestamp: February 13, 2019, 01:21:40 pm
content: Awesome, thanks guys 👍

author: Psi
author_rank: Super Contributor
timestamp: February 14, 2019, 12:06:42 pm
content: You can get different colors but most are yellow/orange
Help ID this Analog Devices chip please - Page 1
Forum section: electronics / beginners

author: grantb5
author_rank: Regular Contributor
timestamp: July 07, 2023, 04:36:00 pm
content: Hi. I would like to identify this chip please. It looks like the analog devices logo and I think it might be an MSOP-10. It is located in the vicinity of the beeper/buzzer/piezo so I'm thinking either an amp or digital pot, but there aren't enough digits for me to figure it out. Thanks!

author: grantb5
author_rank: Regular Contributor
timestamp: July 07, 2023, 04:37:56 pm
content: Found it. I never thought to put the digits together to form D4L. Duh.http://www.analog.com/media/en/technical-documentation/data-sheets/ad5258.pdf
Help ID this chip, QianLi iUV - Page 1
Forum section: electronics / beginners

author: u666sa
author_rank: Frequent Contributor
timestamp: October 23, 2024, 09:41:07 am
content: This chip is located on QianLi iUV light. Can not read the markings.Maybe someone knows what it is?

author: wraper
author_rank: Unknown
timestamp: October 23, 2024, 09:49:10 am
content: HX307http://www.dobled.cn/Show/?Cid=121
Help identify "B0RC1" component on USB-to-I2S audio adapter  - Page 1
Forum section: electronics / beginners

author: 13hm13
author_rank: Frequent Contributor
timestamp: October 12, 2020, 12:06:55 am
content: Have a look at this image....There are three identical black-rectangle devices with "B0RC1" or "BORC1".Can't find any info about them. However, a very similar device leads one to believe the devices areoscillators:Any info on the "B0RC1" or "BORC1" device is appreciated.NOTE:A very similar USB adapter I personally own has devices labelled B0RC7, not B0RC1. So mine end in "7", not "1". Very strange ... maybe fake labeling to prevent reverse engineering attempts?P.S. The ebay/Ali listing hints the devices may be " SITIME silicon crystal oscillator ".??

author: amyk
author_rank: Super Contributor
timestamp: October 12, 2020, 01:45:25 am
content: The hint is correct; does this look familiar?https://lcsc.com/product-detail/SMD-Oscillators-XO_Active-crystal-100MHz-25ppm-3-3V_C78882.htmlhttp://us.100y.com.tw/viewproduct.asp?MNo=113390TheSIT 8008 datasheetreveals that the markings are just an assembly location and lot number, so no doubt they will vary.

author: 13hm13
author_rank: Frequent Contributor
timestamp: October 12, 2020, 01:28:13 pm
content: Quote from: amyk on October 12, 2020, 01:45:25 amThanks!I'm wondering why SiTime chose to use that cryptic labeling strategy? Is it deliberate obfuscation for (as I noted earlier) hindering reverse engineering?
Help identify capacitor and what I can use to replace - Page 1
Forum section: electronics / beginners

author: Crambone
author_rank: Frequent Contributor
timestamp: June 19, 2020, 02:13:32 am
content: Can silver mica be used and what value is this?

author: TimFox
author_rank: Super Contributor
timestamp: June 19, 2020, 02:20:12 am
content: 10 nF = 0.01 uF. Probably +/- 20%. That would be an expensive silver mica, and the disc ceramic capacitor is probably not NP0/C0G. Is the original a bypass capacitor?

author: Crambone
author_rank: Frequent Contributor
timestamp: June 19, 2020, 02:40:40 am
content: Thanks thats what I was guessing it was and it is a bypass cap. Im just getting the ceramic

author: bob91343
author_rank: Super Contributor
timestamp: June 19, 2020, 11:31:05 pm
content: Why are you replacing it? Physically it looks okay. Yes it's 0.01 microfarads with a 20% tolerance.
Help identify circuit components - Page 1
Forum section: electronics / beginners

author: lumdef
author_rank: Contributor
timestamp: January 18, 2025, 10:07:13 am
content: The attached PCB has been taken out of an old monitor.1. Can you please help me identify the boxed components?2. What is that bold drop on the biggest capacitor?3. Two MOSFET radiators are grounded, but not the biggest one, why?4. What is the point of the flat metal piece near the AC power plug?

author: PGPG
author_rank: Frequent Contributor
timestamp: January 18, 2025, 11:35:47 am
content: Quote from: lumdef on January 18, 2025, 10:07:13 amInductive components may be wound individually for this design.Number of pins?If 2 - it is certainly simply choke.If more - I don't know.Quote from: lumdef on January 18, 2025, 10:07:13 amJust glue to fix it.Quote from: lumdef on January 18, 2025, 10:07:13 amAre you sure these are MOSFETs and not voltage regulators?Quote from: lumdef on January 18, 2025, 10:07:13 amHave no idea.May be to shield partially (using edge currents) the field from this inductive component from going directly to AC supply cable what could exceed EMC emission limits (by using this cable as antenna).

author: Gyro
author_rank: Super Contributor
timestamp: January 18, 2025, 12:18:50 pm
content: Quote from: lumdef on January 18, 2025, 10:07:13 amTop center is the switch mode power supply transformer. Bottom center is the mains common mode choke for interference. The two on the left are the high voltage transformers for the two CCFL backlights.

author: lumdef
author_rank: Contributor
timestamp: January 18, 2025, 02:07:42 pm
content: Quote from: PGPG on January 18, 2025, 11:35:47 amIndeed, these are Schottky Diodes SRF10-10.
Help Identify Component (Inductor?) Labelled 'EM' or 'W3'? - Page 1
Forum section: electronics / beginners

author: jetpigeon
author_rank: Newbie
timestamp: July 11, 2023, 09:39:59 am
content: Hi All!New to the forum and am excited to get a little more into this world.I have a faulty 10G Brodcom NIC (BCM95780A1008G) - a casual inspection highlights what I assume are two broken inductors (photo of one attached). I've already desoldered the worst one (was in much worse shape than the pictured one) but am having a hard time figuring out exactly what they are and where I can find / buy new ones?Photo attached, as far as I can see, the only identification on them are the letters 'EM' which doesn't seem to yield much when searching.As pretty much a total newbie, can anyone help me on my path to identifying then and sourcing replacements?Have done a fair amount of searching to no avail, but please forgive me if I've been stupid and missed something obvious. Thanks in advance!Edit: removed in-line photo and attached instead.Edit2: added photo of 2nd component, pretty sure it reads 'EM' but I guess it could be 'W3' upside down?

author: ArdWar
author_rank: Frequent Contributor
timestamp: July 11, 2023, 10:38:43 am
content: They're most likely will work just fine if you left them as they are in your first picture.

author: jetpigeon
author_rank: Newbie
timestamp: July 11, 2023, 12:05:53 pm
content: Thanks for the reply. Unfortunately the 2nd one (that I've already removed) was so far gone that the connection on one leg was broken and not making contact.I could try and solder on a small leg of metal and make the connection again I guess?Presumably just bridging the connection would be a bad idea?Thanks

author: MathWizard
author_rank: Super Contributor
timestamp: July 12, 2023, 09:46:29 am
content: It looks like it's just for rail filtering, rather than a DC-DC converter, unless all the circuitry is in the other side. A lot of circuits would not miss it, but IDK what that circuit really needs.It's probably not super critical, you might find something similar on another similar PCB like a cablebox or old motherboard. How did they get damaged ?If you can solder it back, I'd just do that, lay a little piece of bare copper wire between the pad and tinned end of the wire if the leg is too short now. Use flux if you have any, it would solder easy.

author: jetpigeon
author_rank: Newbie
timestamp: July 17, 2023, 02:30:38 pm
content: Thanks MathWizard,I'll have a go at re-soldering - I'm using this to learn with so I'm not too worried if it all goes wrong.Not sure how it failed, it was pulled from a server as faulty and the damage was already apparent, there's a processor w/heat sync on the other side so I wonder if heat was a contributing factor? Or maybe it's just mechanical failure from poor handling in the past.Sounds like attempting to re-solder is the way forward here then, I've had a look for similar components on other boards but as I'm new to this I don't really have much floating about that I can use for donor parts.Thanks for your thoughts and advice, much appreciated.
Help identify component - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: August 31, 2019, 07:13:16 am
content: Hi,I am in need of help figuring out the component in TO-92 package in the attached picture.This was taken out of a SMPS for Amiga A500 (i.e. "lightweight" version) that is not working (it emits a cycling click sound and the output is fluctuating - I think the supply keeps restarting).The component sits specifically in the section which provides the feedback for the 5V rail.I suspect it is a variant of LM431 / TL431, but could someone please help confirm?Thank you!

author: Chriss
author_rank: Frequent Contributor
timestamp: August 31, 2019, 07:38:14 am
content: I agree too does it could be some of the TL431.My method to be more sure when I run in such of problem is to check how is the part wired up in the original circuit and then I check from datasheet or on the net how others are wired up.When the wiring is very similar or in many cases almost the same as in the datasheet.Sent from my SM-J500F using Tapatalk

author: giosif
author_rank: Frequent Contributor
timestamp: August 31, 2019, 08:00:19 am
content: That was quick!Thank you both for the confirmation!I've replaced it with a TL1431, which seems to have the same specs as a TL431.However, this was not the issue with the power supply (kind of tells how much I understand SMPS's).

author: ArthurDent
author_rank: Super Contributor
timestamp: August 31, 2019, 12:43:31 pm
content: I think that a clicking sound from a SMPS is generally caused by the supply trying to start then detecting a short so the supply shuts down and tries again and this cycle continues. If the supply is doing this with no load, some supplies will not start without a load and this is true of a lot of PC power supplies. From videos it appears if this is an Amiga A500 supply that it should work without a load and at the end of this video it shows someone checking the output voltage. The most likely problem of a SMPS this age would be the electrolytic capacitors and I would suspect them first.

author: giosif
author_rank: Frequent Contributor
timestamp: August 31, 2019, 08:46:16 pm
content: Yes, got caught with that in the past (i.e. measuring output from a power supply with no load) and thought this time I was doing things right: I added a load on the 5V power rail, since that one was involved in the feedback loop.But I clearly do not understand power supplies as, after checking and double-checking pretty much all components (thankfully, the design of this SMPS is simple, with not that many components), I decided to plug it into an Amiga A500 and turn it on.And, what do you know: the clicking stops and power rails all measure as expected.for the power supply,for me for getting caught again
Help identify component - Page 1
Forum section: electronics / beginners

author: wrinklehead
author_rank: Contributor
timestamp: December 20, 2019, 06:27:31 pm
content: I am trying to repair a board with a component I cannot identify. (Please see attached). Component in question is marked c138 which would lead me to believe it's a capacitor however looking at it it looks like a diode with the polarity marking. I'm thinking this is some type of cap with 2.2uf and 35 volt rating. Am I on the right track here?

author: Gregg
author_rank: Super Contributor
timestamp: December 20, 2019, 06:32:01 pm
content: Yes, it is a capacitor. But C122 Looks like your problem

author: Rigolon
author_rank: Regular Contributor
timestamp: December 20, 2019, 06:44:21 pm
content: Just adding that it's probably a Tantalum capacitor, and yes it should be 2.2uF and 35V rating.Also,Quote from: Gregg on December 20, 2019, 06:32:01 pmI agree.

author: wrinklehead
author_rank: Contributor
timestamp: December 20, 2019, 06:49:28 pm
content: Quote from: Rigolon on December 20, 2019, 06:44:21 pmThanks guys. C122 is indeed the problem or at least a problem but shares the same markings as c138. I figured given the state of C122 it might be easier to identify C138.

author: james_s
author_rank: Super Contributor
timestamp: December 20, 2019, 07:49:34 pm
content: It very conveniently says right on the board what it is. Definitely a tantalum capacitor, with a little luck it will be your only fault as shorting out is a notorious failure mode of tantalum capacitors which are otherwise excellent in nearly every respect.
Help identify component - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: June 25, 2023, 07:19:57 pm
content: Hello,I am looking to confirm the SOT-23 component marked as CR16 in the attached picture.Is that a BAV99 or something else?Thanks!

author: amyk
author_rank: Super Contributor
timestamp: June 25, 2023, 07:40:28 pm
content: You can use a multimeter to check.According to images BAV99 usually marked A7W.However, I will say that looks like a typical NXP/Philips part marking.

author: giosif
author_rank: Frequent Contributor
timestamp: June 25, 2023, 07:44:02 pm
content: Quote from: amyk on June 25, 2023, 07:40:28 pmI would, but that picture is not with my board.On my board, that component was blown to smithereens.

author: Vovk_Z
author_rank: Super Contributor
timestamp: June 25, 2023, 08:16:57 pm
content: Googling 'sot-23 a7 code' gives BAV99. IDK.

author: mengfei
author_rank: Regular Contributor
timestamp: June 26, 2023, 01:36:43 am
content: SOT-23 codeshttps://alltransistors.com/smd-search.php?search=A7shttps://www.s-manuals.com/smd/a7

author: giosif
author_rank: Frequent Contributor
timestamp: June 26, 2023, 09:57:07 pm
content: Thank you all for your responses!
Help identify component - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: August 08, 2023, 08:22:01 am
content: Hi,Can someone please help me identify the SOT-23 component in the picture below?I looked up for 19WCA, I9WCA, 19W and I9W, but got nothing relevant.Thanks!

author: liaifat85
author_rank: Regular Contributor
timestamp: August 12, 2023, 08:12:03 am
content: I think the company remarked the IC.

author: DavidAlfa
author_rank: Super Contributor
timestamp: August 12, 2023, 08:39:26 am
content: BAT721C is L9*, W means it was made in China.Though slightly different marking, maybe just due a different manufacturer.
Help identify component - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: January 06, 2017, 12:41:10 pm
content: Hi,Can someone please help me identify the component in the pictures?It sits between the mains input and the two diodes (diodes are in series) and measures around 30in resistance.Thanks!

author: PA0PBZ
author_rank: Super Contributor
timestamp: January 06, 2017, 12:46:02 pm
content: Quote from: giosif on January 06, 2017, 12:41:10 pmNow warm it up and measure again

author: Ammar
author_rank: Regular Contributor
timestamp: January 06, 2017, 01:26:51 pm
content: https://en.wikipedia.org/wiki/Inrush_current_limiter

author: giosif
author_rank: Frequent Contributor
timestamp: January 06, 2017, 03:38:49 pm
content: Quote from: PA0PBZ on January 06, 2017, 12:46:02 pmThanks!Quote from: Ammar on January 06, 2017, 01:26:51 pmThank you!

author: amyk
author_rank: Super Contributor
timestamp: January 07, 2017, 01:31:10 am
content: It's obviously a schlumberger. Like a hamburger, but made with schlum (the black stuff between the two buns.)

author: giosif
author_rank: Frequent Contributor
timestamp: January 07, 2017, 10:58:11 am
content: Quote from: amyk on January 07, 2017, 01:31:10 amNow need to look for a schlumberger shop nearby: got McDonald's, KFC, but can't seem to see any schlumberger ones...

author: slurry
author_rank: Regular Contributor
timestamp: January 07, 2017, 11:06:02 am
content: I want a combitester meal with fries and a coke with no ice, please!

author: NottheDan
author_rank: Frequent Contributor
timestamp: January 07, 2017, 11:35:02 am
content: Quote from: slurry on January 07, 2017, 11:06:02 amWould you like your coke in the combitester or in a separate cup?
Help identify component item 1 - Page 1
Forum section: electronics / beginners

author: denimdragon
author_rank: Regular Contributor
timestamp: March 31, 2021, 04:51:09 pm
content: Here is the first component. I'm still tackling the warehouse task,so I have been find all sorts of cool looking components. Any ideas?

author: YurkshireLad
author_rank: Frequent Contributor
timestamp: March 31, 2021, 04:53:18 pm
content: It looks like an old torture device!

author: denimdragon
author_rank: Regular Contributor
timestamp: March 31, 2021, 06:39:42 pm
content: I could see that. I wonder if it's some type of early test system for a section of a PCB with pads matching the thick pin array above the ICs?

author: alsetalokin4017
author_rank: Super Contributor
timestamp: April 01, 2021, 12:00:58 am
content: turbo encabulator transverse interface buffer

author: james_s
author_rank: Super Contributor
timestamp: April 01, 2021, 12:55:58 am
content: I've seen DIP sockets that had a weird pinout like that, seems like I ran into that in an older Heathkit device.Not sure what that is though, maybe some kind of prototype?

author: WattsThat
author_rank: Frequent Contributor
timestamp: April 01, 2021, 04:54:26 am
content: They look like late sixties NASA style flat pack NOR gate IC’s with hi-rel pins. Maybe early RTL.Yes, Heathkit had some weird ideas in the early seventies. They had Molex make special staggered pin 0.1” IC strip sockets because the engineers in Benton Harbor were afraid Joe Six Pack couldn’t solder in-line pin sockets without bridging pins.The original product was stamped and formed tin plated flat strip in roll form. You cut or snapped off strips of 7 or 8 pins, times two, and inserted into the pc board and then soldered. Once in place, you snapped off the top the held the pins together. They were absolute junk and they abandoned the idea as kit chip counts went higher and the sockets starting being the reason properly built kits didn’t work. As TTL became mainstream and cheap sockets hit the market, they went with custom one piece sockets with the same stupid offset pins.

author: Jwillis
author_rank: Super Contributor
timestamp: April 01, 2021, 07:21:18 am
content: Flux capacitor

author: gcewing
author_rank: Regular Contributor
timestamp: April 01, 2021, 11:49:30 am
content: Quote from: WattsThat on April 01, 2021, 04:54:26 amI don't think it was just for hobbyists. I've seen some old TV circuitry using DIP sockets with staggered pins like that. I'm guessing it's because the PCB manufacturing process they had at the time couldn't cope with pads that close together.
Help identify component item 2 - Page 1
Forum section: electronics / beginners

author: denimdragon
author_rank: Regular Contributor
timestamp: March 31, 2021, 04:54:43 pm
content: And here is the second little one. Looks like '75 Date Code. Thanks for any help in advance

author: Terry Bites
author_rank: Super Contributor
timestamp: March 31, 2021, 06:06:35 pm
content: Get in touch with CPU Galaxy cpugalaxy@gmx.at He's your man. Looks like a bit of old hybrid logic.

author: Benta
author_rank: Super Contributor
timestamp: March 31, 2021, 06:08:14 pm
content: Typical MIL-SPEC packaging. What IC's in there is anbody's guess.
Help identify component - Page 1
Forum section: electronics / beginners

author: alkk
author_rank: Newbie
timestamp: December 05, 2011, 01:50:25 pm
content: Hello,I have a board with blown component I can't identify. Can someone help me with that?Image attached, component is marked with red circle.

author: 8086
author_rank: Super Contributor
timestamp: December 05, 2011, 04:13:45 pm
content: Likely:http://www.datasheetcatalog.org/datasheet/infineon/1-SN7002N_030403.pdf(PDF link)

author: alkk
author_rank: Newbie
timestamp: December 05, 2011, 07:08:45 pm
content: Thank you.

author: metalphreak
author_rank: Frequent Contributor
timestamp: December 06, 2011, 09:33:00 am
content: That last bit looks like a smiley face hahasSN
help identify connector type - Page 1
Forum section: electronics / beginners

author: bonanz
author_rank: Contributor
timestamp: June 18, 2013, 05:05:48 am
content: what is the connector type/pin size on this board?I sent an email asking, but someone probably can identify off the top of their head.http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=310543615626

author: Falcon69
author_rank: Super Contributor
timestamp: June 18, 2013, 06:26:45 am
content: JST connector HeadersThey make many different kinds.

author: 807
author_rank: Frequent Contributor
timestamp: June 18, 2013, 02:08:45 pm
content: Looks like it's the PH range:-http://www.jst-mfg.com/product/pdf/eng/ePH.pdf
help identify connector - Page 1
Forum section: electronics / beginners

author: Daxxin
author_rank: Regular Contributor
timestamp: July 20, 2017, 06:54:32 pm
content: hi look like smb but bigger

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: July 20, 2017, 08:34:15 pm
content: Is the center contact a socket like with SMB?Outer Sleeve is completely solid?

author: Daxxin
author_rank: Regular Contributor
timestamp: July 21, 2017, 02:59:59 am
content: yes , here the side

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: July 22, 2017, 11:30:17 pm
content: Might be 1.6-5.6 (click-lock variant) or the ominous 'miniature push-on' (roughly BNC-sized) mentioned but not shown in the catalogue from Automatic Connector. Can you measure the outer diameter of the serrated part? Metric designations are outer dia. of inner conductor - inner dia. of outer conductor.
Help Identify Diode - Page 1
Forum section: electronics / beginners

author: JustMeHere
author_rank: Frequent Contributor
timestamp: December 31, 2021, 11:02:42 pm
content: Can anyone help me identify this diode?

author: bob91343
author_rank: Super Contributor
timestamp: December 31, 2021, 11:09:09 pm
content: Looks a little like this one.https://gr.mouser.com/datasheet/2/366/shins04507_1-2282018.pdf

author: golden_labels
author_rank: Super Contributor
timestamp: January 01, 2022, 10:29:26 am
content: The first result for G40E120CTW+the same datasheet from the producer’s site.

author: gamalot
author_rank: Super Contributor
timestamp: January 01, 2022, 10:52:09 am
content: There is no doubt that it is G40E120CTWhttps://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_LITEON-G40E120CTW_C266540.html

author: rpiloverbd
author_rank: Regular Contributor
timestamp: January 16, 2022, 03:36:05 pm
content: This is the first time I am seeing a 3-pin diode. Thanks to all including the questioner and answerers.

author: golden_labels
author_rank: Super Contributor
timestamp: January 16, 2022, 09:26:57 pm
content: That’s not a 3-pin diode. Those are two diodes in a single package, sharing the cathode. See the diagram on the first page: just below the pinout.

author: Munyua44
author_rank: Contributor
timestamp: January 17, 2022, 04:50:59 am
content: Through research I have come across this diode which looks like the one;https://optoelectronics.liteon.com/upload/download/DS-50-93-0021/R516AD.pdf

author: golden_labels
author_rank: Super Contributor
timestamp: January 17, 2022, 10:57:51 pm
content: The photo shows:a component in a three-lead TO-220, black, opaque package, screwed to a heatsink.You identified it as:an element in two-lead, translucent, green package similar to TO-92, having neither a heatsink attachment nor a need to have one.I would say the research was not really good. In particular since the component has been identified over 2 weeks ago to be G40E120CTW.

author: magic
author_rank: Super Contributor
timestamp: January 17, 2022, 11:27:07 pm
content: The icon shows: this poster has been bannedYour response is: bothering to argue with himAnd yes, there was a reason for the ban

author: golden_labels
author_rank: Super Contributor
timestamp: January 18, 2022, 12:02:54 am
content: I didn’t know that this icon indicates a ban. Though I considered reporting them myself, as I hada suspicion of power-posting. Actually not the first recently, not even the first this thread…

author: magic
author_rank: Super Contributor
timestamp: January 18, 2022, 12:08:31 am
content: Blame Dave. I recall him saying that he wanted something subtle so that the forum doesn't look too scary when you read it and encounter banned posters, or something like that
Help identify fuse - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: October 19, 2020, 05:13:15 pm
content: Hi,Can anyone please help me identify the manufacturer or technical specs (other than that it is a 7A fuse) of the fuse in the attached photos?It is coming from a Rigol DP832 power supply I am trying to repair.Thanks!

author: Alti
author_rank: Frequent Contributor
timestamp: October 19, 2020, 06:21:00 pm
content: Maybe take a look atLCSC, search through the pictures to find sth similar.

author: giosif
author_rank: Frequent Contributor
timestamp: October 19, 2020, 06:45:58 pm
content: Thank you for the advice!Using that web site, I was able to identify the manufacturer - Holly- and, probably, the specific part: 30TS-070.
Help identify IC - SD1021 - Page 1
Forum section: electronics / beginners

author: jdev99
author_rank: Regular Contributor
timestamp: November 23, 2018, 10:40:50 pm
content: I bought a cheap 12v USB car adaptor on eBay to use in a bench powersupply project, and found this IC inside.I know it must be a 5v regulator but can not find the datasheet for it.The numbers on it is: 1741 and SD1021.I traced the circuit and it looks like this.Can anybody tell me more about this IC, what is it's max. current that it can deliver?

author: glarsson
author_rank: Frequent Contributor
timestamp: November 23, 2018, 10:57:59 pm
content: 1741 = manufactured week 41 of 2017.No need to search the internet for that number.

author: jdev99
author_rank: Regular Contributor
timestamp: November 24, 2018, 01:23:46 pm
content: I found it.http://www.si-soft.cn/2Ayixiaxiaodianliuchechong/97.html5V , 0.8A max
Help identify IC - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: November 06, 2019, 07:56:29 pm
content: Hi,Can someone please help me identify the IC in the picture below?Either my Google-fu is not what it used to be or this is not a common IC.The said component is on the board of a Keysight 33210A func gen.Thanks!

author: jmelson
author_rank: Super Contributor
timestamp: November 06, 2019, 07:59:10 pm
content: THS3001

author: giosif
author_rank: Frequent Contributor
timestamp: November 06, 2019, 08:12:00 pm
content: That was quick!Thank you!I forgot to search for the second string only (i.e. ADQ), which is what I'm guessing you did.
Help identify IC - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: January 17, 2020, 09:36:28 pm
content: Hi,Once again, I am in need of help identifying the IC in the below picture.Two such components are found in the input section of a bench meter (Gossen Metratop 52) and I'm trying to figure out what they're supposed to do.Thank you!

author: andy3055
author_rank: Super Contributor
timestamp: January 18, 2020, 04:23:04 am
content: May be this?https://pdf1.alldatasheet.com/datasheet-pdf/view/6768/NEC/UPC4556G2.htmlThere is a link for the data sheet on that page. Not sure if it is the one.

author: Jwillis
author_rank: Super Contributor
timestamp: January 18, 2020, 07:08:15 am
content: I was thinking it's a dual mosfet likehttps://www.onsemi.com/pub/Collateral/NTMD4840N-D.PDFbecause of pins 2 and 4 could be gates 5 to 8 look like they are on the same wide trace .Could be drain ?

author: giosif
author_rank: Frequent Contributor
timestamp: January 18, 2020, 04:38:01 pm
content: Thank you both for looking into this!I too think it is likely a mosfet, but I'll try to confirm.

author: andy3055
author_rank: Super Contributor
timestamp: January 18, 2020, 04:55:05 pm
content: Try to trace the pin out/nearby circuitry and then you will get a better idea of what it should be.

author: Zero999
author_rank: Super Contributor
timestamp: January 18, 2020, 09:10:18 pm
content: Do you think it's faulty? If so, why?

author: giosif
author_rank: Frequent Contributor
timestamp: January 18, 2020, 09:43:46 pm
content: Main reason I'm asking is I'm trying to understand that part of the circuit.Also, once I understand what that component is and where it fits in the circuit, I would like to determine if it is working or not.

author: giosif
author_rank: Frequent Contributor
timestamp: January 20, 2020, 11:06:06 pm
content: And I found the actual component: HAT2016R - a dual N channel mosfet.Thank you all for your pointers!

author: Jwillis
author_rank: Super Contributor
timestamp: January 21, 2020, 04:57:31 am
content: Quote from: giosif on January 20, 2020, 11:06:06 pmAwesome! How did you find it ? I looked everywhere.

author: rx8pilot
author_rank: Super Contributor
timestamp: January 21, 2020, 05:07:00 am
content: Quote from: Jwillis on January 21, 2020, 04:57:31 amYes - share!

author: giosif
author_rank: Frequent Contributor
timestamp: January 21, 2020, 10:09:44 pm
content: Quote from: Jwillis on January 21, 2020, 04:57:31 amSame here, until I realized I had the schematics for the Gossen Metrahit 25/26 (shared in confidence by Gossen).And guess what they had around the input section?So, I cheated a bit.
Help identify IC - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: June 04, 2023, 11:45:07 am
content: Hi,I am troubleshooting a Synology motherboard which doesn't want to power up anymore and, part of that process, I've come across this SOT-23-6 IC which I'm trying to identify (please see attached photo).It is part of the power-on / power-off circuitry on the board and I suspect it is some kind of "power switch" IC.Also, I remember there is a manufacturer that typically places the last characters in the marking rotated to 90 degrees, like with the "P" letter here, but I don't recall who that was (Diodes Inc maybe?).Also, just to confirm, the IC does indeed have a total of 3 dots: one to mark pin 1 and the other two, I suspect, part of the marking.Finally, pins 1 and 4 are connected to GND and pin 2 seems to be (one of) the output(s).Any help is much appreciated.

author: DavidAlfa
author_rank: Super Contributor
timestamp: June 04, 2023, 11:54:26 am
content: Maybe a RT9182:https://www.aliexpress.com/item/10000004701773.html

author: Jwillis
author_rank: Super Contributor
timestamp: June 04, 2023, 12:34:13 pm
content: Could be an LDO RT9182. But I get A different searchhttps://www.farnell.com/datasheets/2353989.pdf.Did you measure the component?SOT-23-6 and the SOT−363 differencehttps://www.onsemi.com/site/cdroms/micropackages/pdf-docs/onsemi/SOT563%20footprint-prof%23B3380.pdf

author: wraper
author_rank: Unknown
timestamp: June 04, 2023, 01:37:13 pm
content: I have doubts it's RT9182. While I don't know exact RT9182 marking, this does not look like Richtek marking and overall it does not look like vreg PCB layout. If compared with datasheet, supposed VOUT1 (pin 6) and VIN (pin 5) seem to be connected together and have thin traces. supposed EN1 (pin 5) on other hand has a thick trace. EDIT: and GND connections mentioned by OP make it impossible to be RT9182 .On other hand googling for MBT3904 produces a lot of photos with similar markings so I'm pretty sure it's MBT3904DW1T1G or its clone.https://www.lcsc.com/product-detail/Bipolar-Transistors-BJT_onsemi-MBT3904DW1T1G_C110150.html

author: Jwillis
author_rank: Super Contributor
timestamp: June 04, 2023, 02:05:10 pm
content: I think your right Wrapper. The traces just don't look right to me either. Another thing is the note on the first page of the Richtek datasheet . "There is no pin1 indicator on top mark for SOT-23-6..." . The one in the photo shows a mark for pin 1.

author: giosif
author_rank: Frequent Contributor
timestamp: June 04, 2023, 04:37:30 pm
content: Many thanks, guys!I agree it very much looks to be a MBT3904DW1T1G.
Help identify IC marking code - Page 1
Forum section: electronics / beginners

author: ulltrium
author_rank: Contributor
timestamp: July 28, 2018, 08:45:27 am
content: Hi guys,anyone can help identifying the chip is in the picture attached? It looks to be a DC regulator but I cannot find its specifications anywhere, so I guess it is a marking code.many thanks.

author: Psi
author_rank: Super Contributor
timestamp: July 28, 2018, 09:21:01 am
content: Cant be sure, but seems very likely M3TEK IT77103http://www.m3tekic.com/upload/2014/12/20141205174538.pdf

author: ulltrium
author_rank: Contributor
timestamp: July 28, 2018, 09:23:25 am
content: Thanks Psi, you're the best.

author: Psi
author_rank: Super Contributor
timestamp: July 28, 2018, 09:26:04 am
content: This is what i googled to find the full name"77103" sot-23-5
Help identify Oscilloscope - Page 1
Forum section: electronics / beginners

author: Con_30
author_rank: Newbie
timestamp: November 16, 2022, 07:37:17 am
content: I recently aquired an old analog oscilloscope however the plate with the make and model number appears to be missing from the front. The label on the back states Hitachi but that is all I have to go on. After hours of searching the closest I can find is the V-302 however the front dials and face plate are quite different. Has anyone seen one of these before?

author: DC1MC
author_rank: Super Contributor
timestamp: November 16, 2022, 07:42:59 am
content: Hitachi V-302B with "custom" knobshttps://i.ebayimg.com/images/g/8gsAAOSw2FxirlVm/s-l1600.jpgCheers,DC1MC

author: Psi
author_rank: Super Contributor
timestamp: November 16, 2022, 08:00:15 am
content: Could also be a OEM rebrand of whoever made the Hitachi one.Seems unlikely someone re-knobbed it like that themselves.Are there any markings on the rear of the unit, or the side / underneath ?Sometimes there is a 2nd nameplate with S/N and other stuff

author: Con_30
author_rank: Newbie
timestamp: November 16, 2022, 08:45:36 am
content: I also think it is unlikely someone re-knobbed it as they would've had to replace the back plate as well as it doesn't match the V-302B either. The only other markings on the unit are on the back.

author: Zenith
author_rank: Frequent Contributor
timestamp: November 16, 2022, 10:08:58 am
content: It has an ECI logo on it. Energy Concepts Inc is a company which has provided technical training for years. They are still going. There are a few photos of their scopes on the WWW, one with similar knobs.This is most likely a standard Hitachi scope - V302B - with some cosmetic changes for ECI.
Help identify power connector and pinout - Page 1
Forum section: electronics / beginners

author: aix
author_rank: Regular Contributor
timestamp: December 26, 2020, 04:35:36 pm
content: I need to make a power cable for a Teltonika TRB140 LTE gateway.It uses a connector that looks like the attached image.I thought this was Micro-Fit 3.0, but it's slightly larger and won't mate with Micro-Fit 3.0. Any idea what it might be? The only marking I see on the part I have is "JMCONN".Separately, I'm stuggling to make sense of the pinout:https://wiki.teltonika-networks.com/view/TRB140_Powering_OptionsIt's a DC power supply -- what might those input and output pins be?P.S. I'll ask the manufacturer, but figured someone here might know or could make an educated guess.

author: aix
author_rank: Regular Contributor
timestamp: December 26, 2020, 05:18:50 pm
content: So it seems that the I/O pins are GPIO of sorts, accessible from firmware. Not quite sure why they'd be on a connector labelled "power" but it seems I can just ignore them for my purposes.The physical connector is still a bit of a mystery. It seems that I'm able to mutilate MicroFit 3.0 to sorta fit, but the result is very ugly. One physical difference between whatever this is and MicroFit is that its tab (and the corresponding cutout in the enclosure) is considerably narrower than MicroFit's.
Help identify SOIC-8 mosfet by markings - Page 1
Forum section: electronics / beginners

author: u666sa
author_rank: Frequent Contributor
timestamp: December 20, 2023, 03:00:01 pm
content: I have two of these. First three pics. They were taken off laptop mobo. The rest I don't remember.Also, another one, last pic, I also assume is a mosfet, but I'm not sure. Help me identify it as well.and this one, AJKSD

author: RoGeorge
author_rank: Super Contributor
timestamp: December 20, 2023, 03:21:08 pm
content: No need to post 4 pictures of the same chip.That chip was large enough, so IOR to marked it in clear. Search online for "F7425 datasheet":https://www.infineon.com/dgdl/irf7425pbf.pdf?fileId=5546d462533600a4015355fb1c361bdc

author: u666sa
author_rank: Frequent Contributor
timestamp: December 20, 2023, 03:21:26 pm
content: Ok, first one I found, IRF7425TRPBF -https://static.chipdip.ru/lib/368/DOC004368138.pdfHelp with second one, last picture

author: u666sa
author_rank: Frequent Contributor
timestamp: December 20, 2023, 03:26:40 pm
content: Last one is markedAJKSDFDS8884

author: RoGeorge
author_rank: Super Contributor
timestamp: December 20, 2023, 03:32:01 pm
content: Please use online search at first, then ask only if your searches couldn't find anything.On such chips the first line is encoding the fabrication date, then the next lines is the component name. So, that's a FDS8884.

author: u666sa
author_rank: Frequent Contributor
timestamp: December 20, 2023, 04:11:41 pm
content: Quote from: RoGeorge on December 20, 2023, 03:32:01 pmPerhaps you can help me some more. Component name is MDV1660URH. I get anything but datasheet, links to buy it on ali, ebay, etc, but no datasheet. What's happening? Marking is MDV1660. Manufacturer is MegnaChip. Package PDFN33.

author: RoGeorge
author_rank: Super Contributor
timestamp: December 20, 2023, 05:26:11 pm
content: I've double clicked the word "MDV1660" you typed above, to select it, then right-click on selection and search, and this popped up first search result:https://www.datasheetcafe.com/mds1660-datasheet/Most probably the same thing you have. There is a different letter, maybe you misread it from the chip, or it could be the same thing produced by a different company. Just to be sure it's the same thing, double check by testing the continuity between pins 1, 2, 3, all together, then 5, 6, 7, 8.Maybe it's time to change your search engine. I'm using Duck Duck Go.https://duckduckgo.com/?q=MDV1660&ia=webWhich search engine do you use?

author: u666sa
author_rank: Frequent Contributor
timestamp: December 20, 2023, 07:06:22 pm
content: Quote from: RoGeorge on December 20, 2023, 05:26:11 pmI use google!
Help identify the component - Page 1
Forum section: electronics / beginners

author: tonycstech
author_rank: Regular Contributor
timestamp: October 07, 2023, 10:45:17 pm
content: Hi guys i ripped this IC from old AGP GPU ATI radeon 9800 Pro 128MNo idea what this is>No schematics, no boardview.Cant find anything online either.Any help ?

author: RES
author_rank: Regular Contributor
timestamp: October 07, 2023, 10:51:20 pm
content: https://www.vishay.com/docs/67910/si4804cdy-t1-e3.pdf

author: wraper
author_rank: Unknown
timestamp: October 07, 2023, 10:59:44 pm
content: Should be BSO4804 dual MOSFET from Infineonhttps://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1098/BSO4804.pdf

author: tonycstech
author_rank: Regular Contributor
timestamp: October 07, 2023, 11:04:15 pm
content: i looked at that datasheet and i cant see explanation for marking codes.Cannot verify.What numbers did you use to identify it ?

author: wraper
author_rank: Unknown
timestamp: October 07, 2023, 11:07:40 pm
content: Quote from: tonycstech on October 07, 2023, 11:04:15 pm4804 identifies part number. Back side marking suggests it's from Infineon.https://articulo.mercadolibre.com.mx/MLM-830304862-4863g-tda4863g-original-1-pieza-_JMhttps://russian.alibaba.com/product-detail/ISP762-ISP762T-SOP8-I762T-single-smart-1600193123744.html

author: tonycstech
author_rank: Regular Contributor
timestamp: October 07, 2023, 11:19:19 pm
content: when i search 4804 on google, all i find is nonsense.I must be searching wrong.Is there a trick ?

author: Dan123456
author_rank: Regular Contributor
timestamp: October 08, 2023, 10:39:42 pm
content: I usually search for the number then “IC” and that usually works (I.e. “4804 IC”)You may come across multiple different chips but in that case I usually go to images and see if I can find a picture that looks the same then grab the name from thatOccasionally if that doesn’t narrow it down I’ll add the package to the searchHope that helps

author: Jwillis
author_rank: Super Contributor
timestamp: October 09, 2023, 06:22:23 am
content: Quote from: tonycstech on October 07, 2023, 11:19:19 pmSMD codes are very dependant on the package type. So you would search "SOIC-8 4804". SOIC ( Small Outline Integrated Circuit), SOP (Small-outline Package) have slightly different footprints. So in some cases you may have to take some measurements with a set of calipers to know what package you have. Many IC's and transistors can also have more than one package type , so you may have to search the package type to make any sense of the printed code.
Help identify this (or manufacturer of this) component - Page 1
Forum section: electronics / beginners

author: giosif
author_rank: Frequent Contributor
timestamp: February 23, 2015, 08:24:55 pm
content: Hi,Could someone please help me identify the component this plastic enclosure is part of?Or, otherwise, the name of the manufacturer (I tried MC and OMC, but got no results)?This is taken from a Solartron 7060G bench multimeter and it covers a few wire windings around a common core (wires are of different thickness).Sorry, I'm too newbie to identify the name/function of such a component, even if a known/basic one.Thank you!

author: JuKu
author_rank: Frequent Contributor
timestamp: February 24, 2015, 09:24:01 am
content: Crop just the logo and ask Google image search to find similar, you might get the manufacturer.

author: bugs
author_rank: Contributor
timestamp: February 24, 2015, 10:31:50 pm
content: could it be ferrite? do you have a picture when it is mounted?

author: Rory
author_rank: Frequent Contributor
timestamp: February 25, 2015, 12:22:44 am
content: Here is a device with the same logo. Google search on the part indicates it's a Vishay resistor.This is from an earlier thread on EEBlog.https://www.eevblog.com/forum/reviews/solartron-7061-help-and-come-photos/
help identify this 8-pin DIP chip from Signetics - Page 1
Forum section: electronics / beginners

author: retiredfeline
author_rank: Frequent Contributor
timestamp: November 17, 2023, 09:41:10 am
content: Standard black epoxy 8-pin DIP chip. The markings on it:(Signetics logo) 76247002That's it. I'd post a picture, but really there is nothing more to see. I assume the 7624 is a date code, although it could be the other way around. Anyway no hits on 7624 or 7002.I extracted it from a small analog board that I acquired I don't remember how. Other chips on the board are a bunch of LM741s. There are a few TO-92 transistors, and one 7808 TO-92 regulator. Lots of axial carbon film resistors and electrolytic capacitors. No company name on the fibreglass single-layer board, just a board ID. Looks like the tracks were laid out with tape and then transferred to resist photographically. Probably a small run board.I'm not trying to restore the board or even find out what it does. In fact I will be tossing it into the recycling bin soon. I'm just curious about the chip. Thanks.Edit: Ok here are pictures of the front and back of the mystery PCB. I've removed the transistors and a trim pot. The position the 7002 chip used to occupy is the top right of the front and the top left of the back. Only 6 of the pins are connected. I'm guessing a special op-amp other than the 741, or a matched pair of transistors. The 77xx date codes on the 741s make it more likely 7624 is a date code so 7002 is the chip model.I won't be doing any tracing on the circuit, it's not worth my time. It's unlikely the chip is worth reusing. I thought maybe somebody might recognise the chip number off-hand.

author: magic
author_rank: Super Contributor
timestamp: November 17, 2023, 09:54:38 am
content: Could be a custom part number.If no one has any quick answer, post pics of the board and/or try to trace the circuitry around the chip to get a clue about what it's doing.Maybe another opamp if everything else is 741.

author: m k
author_rank: Super Contributor
timestamp: November 17, 2023, 11:02:50 am
content: Maybe the one more sophisticated than 741.Is 7808 a typical?Maybe some of it is for offsetting 741 to 0V.76 feels better for the year.

author: Terry Bites
author_rank: Super Contributor
timestamp: November 18, 2023, 09:05:12 am
content: Do post a picture, it may reveal more to another pair of eyes.Work out how it connects to the components around it. The function willl help ID it.https://archive.org/search?query=signetics++dataBooks+
help Identify this chip   - Page 1
Forum section: electronics / beginners

author: prodarkness
author_rank: Contributor
timestamp: November 14, 2017, 07:10:30 am
content: Hi can anyone help me out here. what is the part number for this chip ?thanks.

author: tszaboo
author_rank: Super Contributor
timestamp: November 14, 2017, 09:10:38 am
content: It is not a chip. It is probably a 22KOhm resistor. You need to take better images.

author: prodarkness
author_rank: Contributor
timestamp: November 14, 2017, 09:25:43 am
content: sorry for the caption, i guess is either resistor or capacitor but not sure which =(

author: prodarkness
author_rank: Contributor
timestamp: November 14, 2017, 09:31:56 am
content: when measured in multi-meter with ohm selected, both end is linked , but the resistance measure from front and middle is different from the resistance measure from middle and back.

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: November 14, 2017, 09:48:30 am
content: NF = noise filter? What is the resistance of all points to each other? Maybe some kind of ferrite?

author: prodarkness
author_rank: Contributor
timestamp: November 20, 2017, 01:37:13 am
content: brought "Murata NFM3DP Series, Signal Filter, 50 V dc, 2A SMD" to replace. hopefully everything goes well