hybridfree/eevblog-posts huggingface dataset:
Identify destroyed components - Page 1
Forum section: electronics / beginners

author: theblast
author_rank: Newbie
timestamp: March 08, 2022, 11:11:01 pm
content: I'm a kinda newbee on this field and wants to get better on repair of electronics.My Hamron 30A Car battery Charger. Stoped working and i taken it apart.I found quickly the 2 bad components.Don't see something that can have caused it so want to try to change the to components that has blown.Problem is that components are unreadable, and i have no schematics for the board.One of the components seems like it's R92 who i guess is resistor number 92.But how can i find out what value when it's destroyed like this.The other component i'm not sure about. But i guess some here maybe know.Another thing i find frustrating in other projects is nanoFarad and pikoFarad Capasitors. There never any marking. what value?Is there a way to find without having the schematics?

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 09, 2022, 01:29:08 am
content: R95 is the little black spec marked 913 next to the transistor or IC that had burned up leaving (6 positions) other could be a resistor?Jeff

author: amyk
author_rank: Super Contributor
timestamp: March 09, 2022, 04:36:05 am
content: You'll have to trace out the schematics yourself and then figure out what would likely fit "in the blanks". We can help you do the latter.

author: xavier60
author_rank: Super Contributor
timestamp: March 09, 2022, 05:57:32 am
content: 6 pin SMPS controllers are often from Richtek. The MOSFET will be shorted and the value of the CS resistor needs to be figured out.And other likely damaged parts located.The chance of success is low.

author: theblast
author_rank: Newbie
timestamp: April 14, 2022, 08:50:06 pm
content: Thanks for answers. I choosed not to go further with this project.
Identify Diode with color codes? - Page 1
Forum section: electronics / beginners

author: gmc
author_rank: Regular Contributor
timestamp: November 20, 2022, 12:04:21 pm
content: I'm busy looking into a switched mode power supply from the early 80's which has no schematic, and also no component references on the PCB.I think this component is a diode. It measures 046V in diode mode with the negative on the orange side.I've not seen a component like this before and guessing it's a diode. I've removed it from circuit and no other markings are on it - measures 0.46V in one direction, and nothing in the other.Trying to understand if this is a diode and if so could it be a zener? Is is possible to identify more information for the color codes?

author: Terry Bites
author_rank: Super Contributor
timestamp: November 21, 2022, 07:47:21 am
content: 0.46Vf would suggest a schottkyIt a SOD-64 package

author: gmc
author_rank: Regular Contributor
timestamp: November 21, 2022, 08:01:43 am
content: Thanks - I wondered what that package was. You could be rigtht about it being a schottky. I"ve started tracing the circuit and it doesn't seem to be configured to a zener.

author: Ian.M
author_rank: Super Contributor
timestamp: November 21, 2022, 09:42:29 am
content: The cathode is the end with the colour band nearest to it, and often a wider band. You read the color code starting from the cathode end so that is code '35' Unfortunately that only gets you part of the part number, as you don't know what prefix letters or digits, or suffix letters are in it, or it *may* even be a 'house' code that has to be cross-referenced using the diode manufacturer's databook.

author: EPAIII
author_rank: Super Contributor
timestamp: November 21, 2022, 10:20:32 am
content: Perhaps I am crazy here, but if it is a diode and it reads 0.46V one way and open the other, then it would seem to be functioning properly. This suggests that it is not your problem. Move on.On the other hand, if it is a zener, and you want to check it's zener Voltage, then take readings with the circuit powered up.

author: gmc
author_rank: Regular Contributor
timestamp: November 21, 2022, 10:23:08 am
content: Forgot to add, this is not just to find a faulty component. I'm also trying to create a schematic from reverse engineering the PCB as no schemtic exists. I am trying to add in as many compnent values as possible.SMPS is also dead, so troubleshooting as I go along.
identify IC on PCB 863B.   - Page 1
Forum section: electronics / beginners

author: typematrix
author_rank: Contributor
timestamp: December 19, 2021, 10:07:48 pm
content: HiCan anyone identity 8 pin ucontroller please ,it was driving some Xmas Leds chainsIt says 863B or 8638 on first linesecond line is 150309 (possible datecode??)image attachedregards

author: amyk
author_rank: Super Contributor
timestamp: December 20, 2021, 06:52:27 am
content: What's the pinout?Google has been a complete piece of shit lately wrt looking up IC markings.

author: typematrix
author_rank: Contributor
timestamp: December 20, 2021, 02:27:24 pm
content: Quote from: amyk on December 20, 2021, 06:52:27 am1 Vcc2 Crystal3 Crystal45678 Gnd

author: jwet
author_rank: Frequent Contributor
timestamp: December 21, 2021, 02:56:57 am
content: A PIC 12F683 fits the pinout and makes some sense. Most of the 8 pin PICS have this pinout with xtal on 2/3 and Vcc/Gnd on 8/1. It might be a Chinese clone of a PIC, I've never seen Microchip not have their Logo etc on their parts.
Identify ITT diode - Page 1
Forum section: electronics / beginners

author: rdagger
author_rank: Contributor
timestamp: September 14, 2018, 03:13:15 pm
content: I'm trying to identify a diode. The only markings are ITT. It looks like a 1N4004, but it has a very low voltage drop of around .23V. It was in a full wave rectifier circuit. The date codes on the board are between 1977 and 1978.

author: Benta
author_rank: Super Contributor
timestamp: September 14, 2018, 04:03:19 pm
content: Could be a Schottky, something like a 1N5819. But if you measure forward voltage, you need to put something like 100 mA through the diode to get a meaningful result.

author: rdagger
author_rank: Contributor
timestamp: September 14, 2018, 05:35:25 pm
content: I retested by placing the diode in series with a 0.5A lamp. The voltage drop climbed to 0.35V.The same circuit with a 1N4005 showed a voltage drop of 0.82V

author: Benta
author_rank: Super Contributor
timestamp: September 14, 2018, 08:58:59 pm
content: Well, Schottky then.
Identify letter of formulas - Page 1
Forum section: electronics / beginners

author: Jasonbit
author_rank: Regular Contributor
timestamp: May 05, 2019, 05:32:04 pm
content: Hello folks,I was surfing on internet and I found this image (https://i.pinimg.com/originals/59/7a/3a/597a3aa0e2288887d9469126924ec762.jpg)Exist many letter "s" around the images. This letter means seconds?Thanks

author: PA0PBZ
author_rank: Super Contributor
timestamp: May 05, 2019, 05:34:54 pm
content: Short answer: Yes

author: Jasonbit
author_rank: Regular Contributor
timestamp: May 05, 2019, 05:40:00 pm
content: And the longest answer is?

author: PA0PBZ
author_rank: Super Contributor
timestamp: May 05, 2019, 05:42:47 pm
content: Quote from: Jasonbit on May 05, 2019, 05:40:00 pmProbably explaining why it is seconds for all the formulas, I'll leave that for someone else

author: Benta
author_rank: Super Contributor
timestamp: May 05, 2019, 05:55:01 pm
content: Not a nice image. It's showing "." for multiplication instead of a proper multiplication symbol.

author: Jasonbit
author_rank: Regular Contributor
timestamp: May 05, 2019, 05:57:09 pm
content: Quote from: PA0PBZ on May 05, 2019, 05:42:47 pmI understand, thanks anyway

author: Brumby
author_rank: Unknown
timestamp: May 06, 2019, 12:38:36 am
content: Quote from: Benta on May 05, 2019, 05:55:01 pmThe dot is common means of depicting multiplication. I have no problem with its use - which is entirely appropriate here.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 06, 2019, 12:56:45 am
content: <pedantic hat>"." is commonly understood in this way, in plain text. It is a poor substitute, used when the correct symbol is unavailable.While we can't  change the image now, we can write it properly here: using LaTeX, \$ \cdot \$, using HTML &middot;, using Unicode, ·.The SI also accepts spaces (https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using6.1.5), or, hmm, that's the NIST actually, but it's probably the same. Note that's a non-breaking space, of course.</pedantic>Tim
Identify motor - Page 1
Forum section: electronics / beginners

author: acinho
author_rank: Newbie
timestamp: July 20, 2017, 07:47:37 pm
content: So I pulled this non-functioning (no stator winding and no nameplate) motor from a table saw and I need help identifying it.http://imgur.com/a/A8JWEMy guess is that it's a single phase induction (asynchronous) motor.There is also a capacitor present and the rotor looks like a squirrel cage type but I'm not sure.I'm also curious what that spring is for. Could it be some sort of a centrifugal switch?Any help would be appreciated!

author: Zero999
author_rank: Super Contributor
timestamp: July 20, 2017, 08:42:05 pm
content: Quote from: acinho on July 20, 2017, 07:47:37 pmThat's not a motor. It's just the rotor. Does the shaft spin on the bearings? If the bearings haven't seized up, then the fault lies with the stator, start capacitor and/or any control gear such as contactors and switches.

author: acinho
author_rank: Newbie
timestamp: July 21, 2017, 09:02:19 am
content: I realize this is just the rotor. The bearings are OK.Problem definitely lies with the stator because there is no stator winding present. Previous owner took it out, I guess he was trying to rewind it.

author: cs.dk
author_rank: Unknown
timestamp: July 21, 2017, 09:07:01 am
content: Throw it out.. Really, AC motors are so dirt cheap, it's not worth 10 minutes.
Identify N Channel MOSFET such as a FQPF13 10 without markings? - Page 1
Forum section: electronics / beginners

author: Crambone
author_rank: Frequent Contributor
timestamp: January 15, 2024, 02:54:43 am
content: Is there a way to identify a MOSFET like a FQPF13N10 if it’s not marked?Drew

author: inse
author_rank: Super Contributor
timestamp: January 15, 2024, 05:41:33 am
content: If you do a full parameter test, maybe.I have been doing intensive testing of IGBTs and it’s very hard to have a test method that both covers your requirements, capabilities and the manufacturers approach.Are you talking about counterfeit components or “anonymized“ ones?
Identify numbers on capacitor - PP - Page 1
Forum section: electronics / beginners

author: Jasonbit
author_rank: Regular Contributor
timestamp: December 13, 2020, 09:44:25 pm
content: Hello,I have this Polypropylene Capacitors (please see the attached image) and I can't identity your capacitance. I don't know how I should interpret written numbers on body capacitor. At the back of the condenser I have the number 10.https://www.wima.de/en/our-product-range/pulse-capacitors/mkp-10/Thanks

author: Benta
author_rank: Super Contributor
timestamp: December 13, 2020, 09:48:47 pm
content: 150 nF (= 0.15 uF), 250 VDC (DC = the straight line). Nothing special about it.https://www.wima.de/en/our-product-range/metallized-capacitors/mkp-4/
Identify part and how to check if it’s broken or not - Page 1
Forum section: electronics / beginners

author: HomeLate
author_rank: Newbie
timestamp: March 06, 2021, 08:56:05 pm
content: Can this part be identified? And is it possible to check if it ok or not and if not, is it easy to find a replacement?Thanks!

author: Terry Bites
author_rank: Super Contributor
timestamp: March 06, 2021, 09:32:00 pm
content: Looks like acommon mode choke, probably OEM.https://sme.co.uk/Electrically its two coupled inductors AKA a transformer. Look for two isolated pairs of low ohms connections

author: Algoma
author_rank: Frequent Contributor
timestamp: March 07, 2021, 12:25:02 am
content: Its generally a noise filter for the AC mains, both incoming and outgoing. One half is connected to live, the other neutral. The wires simply in one pin, around the coil a few times and out the other pin. its a fairly simple construction. It acts generally as noise filter for the AC line, by keeping the balance between live and neutral as they go through the coil.Check that the wires on each half have an equal resistance.

author: HomeLate
author_rank: Newbie
timestamp: March 07, 2021, 07:05:28 am
content: Thank you both! I checked the resistance and it is 0.9 ohms on both ends. That looks fine to me so I have to continue my search.This comes from a Compaq 1996 era psu which is non standard ATX/AT. The computer switches on as soon as I plug in the mains, while the power switch is switched off.

author: SeanB
author_rank: Super Contributor
timestamp: March 07, 2021, 09:17:31 am
content: If the power switch connects to the motherboard it is ATX, so power on type is set in the BIOS, to either power on with mains applied, stay off or to come on in last state. If the switch is connected to the power supply, and is fed mains voltage then it is an AT power supply, and the switch is faulty.ATX power supplies always have a standby 5V supply there, even when the main power supply is turned off but mains is supplied. Thus the power on behaviour is controlled from the tiny embedded controller in the South bridge, which runs whenever standby power is applied, and which handles power sequencing, RTC alarm functions and, if enabled, will power up the network interface and listen in for a magic wake packet sent to the network card MAC address. That is why, if you have an old NE2000 or clone network card, you would have that 3 pin connector on card and motherboard for "Wake On LAN" support, that was invariably never used.
Identify SMD Cap - Page 1
Forum section: electronics / beginners

author: Photoman
author_rank: Regular Contributor
timestamp: March 11, 2022, 04:35:15 am
content: I was wondering if anyone can identify the circled SMD cap?I read the marking as ASO. Its in parallel with a 51.1k resistor which is spot on.I cant seem to get any reading in circuit for the cap.The cap and resistor is the feedback for a OSI UDT-455HS Photodiode Amplifier Hybrid sensor.I have a suspicion that the cap might be causing some instability in the sensors amplifier.I will remove it but there's always the chance it will crack or fly off in to low earth orbit.I like to get some replacements just in case.If it helps the schematics I have (for a simpler earlier version) say its can be a 4.7pF, 10pF or 15pF.The rails are +-12v.Thanks!

author: Jeff eelcr
author_rank: Frequent Contributor
timestamp: March 12, 2022, 12:57:03 pm
content: I hate to say it but I usually remove and measure, hopefully not damaging the part in the process.Jeff

author: Photoman
author_rank: Regular Contributor
timestamp: March 13, 2022, 03:58:52 am
content: I got lucky removing it...only lost it once and it bounced in the right direction.It was a 4.7pF cap. I found it interesting that ASO is written on both sides.Im guessing part of that is the tolerance. I found a spec sheet from AVX thats close.It lists A as +-0.05pF. Unfortunately DigiKey is out of stock so I bought the tolerance they had in stock.
Identify smd component - Page 1
Forum section: electronics / beginners

author: Mbre
author_rank: Newbie
timestamp: August 01, 2024, 09:38:32 am
content: I am trying to identify this object I think it is some kind of mosfet maybe I have tried to google it but with no luckIt is in a cable locator transmitter Rycom brandI am hoping to buy it

author: tszaboo
author_rank: Super Contributor
timestamp: August 01, 2024, 10:10:13 am
content: 1) We have a topic called "What's this component please" use it.2) You really have to post a picture of it or there is no chance whatsoever to identify it.

author: Mbre
author_rank: Newbie
timestamp: August 01, 2024, 10:39:06 am
content: Ok Thanks some for reason my picture did not up I will to other thread
Identify SMD component with one dot - Page 1
Forum section: electronics / beginners

author: SHJH-13
author_rank: Newbie
timestamp: January 19, 2022, 01:02:57 pm
content: Hello,On this board I'm trying to make sense of there is a component, similar to an SMD resistor (maybe as big as an 805), but with only one circular dot. the dot is closer to one pad. I have searched a little, but the closest I've come to an answer is:https://www.eevblog.com/forum/beginners/identify-smd-components-one-with-a-square-dot-other-iridiscent/.However, the component in the mentioned post has a square dot in the center. I doubt that my component is a jumper.I appreciate your help and advice.

author: w2aew
author_rank: Super Contributor
timestamp: January 19, 2022, 03:38:44 pm
content: It might possibly be a diode of some sort.

author: golden_labels
author_rank: Super Contributor
timestamp: January 19, 2022, 03:45:28 pm
content: I support w2aew’s identification. The dot indicates some kind of assymetry and there are two groups of common two-lead assymetric components: diodes and capacitors. A polarized radial capacitor of that size is unlikely, so the guess about the diode seems reasonable.Reverse-engineering the circuit would be a good idea, as that may reveal the function of the component.

author: SHJH-13
author_rank: Newbie
timestamp: January 22, 2022, 06:26:32 am
content: Yes, a diode was my first guess as well, however, there are two issues with that which makes me believe it might be something else.1- This is a PIM-sensitive device and having an active component should theoretically increase PIM.2- There appears to be no possible point for biasing the diode. The only possible path is blocked by a capacitor.Thank you for your response.

author: PKTKS
author_rank: Super Contributor
timestamp: January 22, 2022, 08:34:08 am
content: I would guess a TVS some sort..Have been replaced some on laptops..Any way to find reference is schema..Paul

author: rpiloverbd
author_rank: Regular Contributor
timestamp: January 24, 2022, 12:35:41 pm
content: Looks like an SMD diode. Have you checked with a multimeter?

author: John.S
author_rank: Contributor
timestamp: January 25, 2022, 12:47:48 pm
content: HiFrom the time (long-long ago) I made my own FM transmitters I recognize this component as a Varicap.The white dot indicates: White: BA512, 515, BB515, 811Hope this helps.gr. John.
Identify SMD components. One with a square dot, other iridiscent - Page 1
Forum section: electronics / beginners

author: Sergio
author_rank: Contributor
timestamp: February 18, 2021, 11:36:21 am
content: Hello,Could anyone help me to identify what kind of components are the ones on the pictures?The first one is like a resistor but with a square mark on top. Size 0402 or 0603.The other is slightly bigger. With an iridiscent colour (see both pictures to appreciate change in colour)Thank you very much.

author: jpanhalt
author_rank: Super Contributor
timestamp: February 18, 2021, 12:15:14 pm
content: The first item (square dot) is a zero ohm resistor ("jumper"):https://en.wikipedia.org/wiki/Zero-ohm_linkOther pictures are too fuzzy on my display. The single line, if that's what they have, may also mean zero ohms.

author: Sergio
author_rank: Contributor
timestamp: February 18, 2021, 12:35:38 pm
content: jpanhalt,Thank you for the answer.The first component is giving 1 ohm when measeured with multimeter. It should be 0 if it was a zero ohm resistor.About the other component, sorry for the picture quality. It has a greenish shiny colour with a line in the middle but is not looking at all like a resistor. Also, it gives about 25 MOhm with a non steady value with multimeter.

author: mvs
author_rank: Frequent Contributor
timestamp: February 18, 2021, 03:02:48 pm
content: Quote from: Sergio on February 18, 2021, 12:35:38 pmWe live in non ideal world, with non ideal components... 1 Ohm is fine for a smd jumper.QuoteIt could be a blown fuse, if you mean 25 Meg Ohm.It is smd film capacitor, like panasonic ECPU series.

author: Sergio
author_rank: Contributor
timestamp: February 19, 2021, 07:27:49 am
content: mvs,Awesome. Te second component is ECPU panasonic series capacitor. I had never seen this kind of capacitor. Always the typical yellow ceramic or tantalum. Thank you very much.About the first component. I have used zero ohm resistor many times and they never give 1 Ohm. I could bear 0.1 - 0.2 Ohm but 1 Ohm is too much for a jumper. Also the square marking of this components usually looks like a 0 (I mean, an empty square) and this is not. I will keep looking for another thing that fits better (maybe Im worng, but... what can I say? Im a little bit stubborn)
Identify these 2 parts - Page 1
Forum section: electronics / beginners

author: B1nary
author_rank: Contributor
timestamp: November 13, 2017, 07:07:31 pm
content: The parts are on the 8GHz option 030 board for the HP 53131 counter. I've looked at Mouser, Arrow and Digi-Key but nothing seems to come up. I'm posting this under Biginner as that is what I am.The parts are:034AXAWQand52RKNO7A

author: rrinker
author_rank: Super Contributor
timestamp: November 13, 2017, 07:32:06 pm
content: The 52RK one is almost certainly an adjustable voltage regulator, based on where the capacitors and resistors are.

author: amyk
author_rank: Super Contributor
timestamp: November 14, 2017, 01:55:19 am
content: N07A is an LM317.034A is a MC12034AD.
Identify these resistor codes - Page 1
Forum section: electronics / beginners

author: PCChazter
author_rank: Contributor
timestamp: December 17, 2017, 07:44:25 pm
content: I recently bought a Turnigy S60 charger from HobbyKing, and decided to see both how they designed it, and trying to see why it won't charge a single lithium cell (irrelevant to my question, but that's the background to how I got here.) I was looking at the flyback feedback circuit on the LV side, and noticed some SMD resistors that have some of the numbers underlined. There is a mixture of underlined, not underlined, and EIA-96 codes, but it's the underlined ones that I am curious about.As you can see, I have a few that the multiplier is underlined and one that has the whole code underlined. My understanding is that the one with the whole code underlined is supposed to mean it is 303m, but here is where it gets more confusing. I removed it from the circuit and measured it......and I measure 30k...So my question is, is the line just to signify the bottom of the resistor? Do china built products often use resistors that don't follow the "rules" when it comes to SMD code (303is not signifying 303m, but just showing the bottom of the chip?) Am I right in thinking that code should mean 303m?

author: iainwhite
author_rank: Unknown
timestamp: December 17, 2017, 07:58:40 pm
content: I think the underline is just to indicate the bottom, to avoid confusing 6 and 9 etc.The first 2 digits of the SMD code are significant digits, and the third is a multiplier (or if you like, the number of zeros following)so 3 0 plus three zeros = 30,000 ohms or 30k OhmsEdit: I might be wrong about the underlining. Maybe that indicates the position of the decimal point, a bit like 4R7 means 4.7 ??But then that would end up being too small as you say. I guess I am as confused as you are.

author: PCChazter
author_rank: Contributor
timestamp: December 17, 2017, 10:27:23 pm
content: Quote from: iainwhite on December 17, 2017, 07:58:40 pmI am used to the SMD code that 303 indicates 30k Ohms, but am not used to seeing an underline. I tried doing some research, and found that all numbers underlined is supposed to mean milli ohms, but could not find anything on just the multiplier being underlined, and the one that is all underlined definitely is not 303mOhm. The 821measures in circuit to measure 818Ohms, so it almost seems as though it is like you say, and just to make sure you don't confuse it to be 128, which seems weird, as that is 1.2GOhm, and it looks fairly obvious to me which way the digits go. So I am curious if it means something more.

author: Zero999
author_rank: Super Contributor
timestamp: December 18, 2017, 07:29:35 pm
content: Resistors below 10 Ohm tend to be marked with R for the decimal place, so 1R2 would be 1.2 Ohms and R12 would be 120 milliOhms. Below 100milliOhms, the R is often missed off, so 012 would be 12milliOhms. A lower case m is also common for low values, so 1m2 is 1.2milliOhms.
Identify this Chip - Page 1
Forum section: electronics / beginners

author: psteichen
author_rank: Contributor
timestamp: September 29, 2017, 08:02:17 pm
content: I found this in my parts bin. Can't remember what I took it out of, and now I don't know what it is. Can't find a datasheet based on the numbers either. Anybody know?Sent from my SM-G900P using Tapatalk

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 29, 2017, 08:10:34 pm
content: An optical mouse?

author: Zero999
author_rank: Super Contributor
timestamp: September 29, 2017, 08:12:38 pm
content: Quote from: psteichen on September 29, 2017, 08:02:17 pmThat's odd. I couldn't see the images, until I copied any pasted the links and opened them in new tabs. I thought they were broken.It looks like some kind of EPROM. Does the plastic bit on the front, surrounding the window, easily come off?

author: psteichen
author_rank: Contributor
timestamp: September 29, 2017, 08:24:20 pm
content: Quote from: Hero999 on September 29, 2017, 08:12:38 pmYes, it is glued in place, but I can peak under it. Just bonding wires running from the pins to the reflective part visible in the photo.Sent from my SM-G900P using Tapatalk

author: psteichen
author_rank: Contributor
timestamp: September 29, 2017, 08:25:42 pm
content: Quote from: PA0PBZ on September 29, 2017, 08:10:34 pmGood guess. Although I don't remember taking one apart. Certainly possible though.Sent from my SM-G900P using Tapatalk

author: Gyro
author_rank: Super Contributor
timestamp: September 29, 2017, 08:28:30 pm
content: Old webcam? Looks too fine for a mouse.

author: Benta
author_rank: Super Contributor
timestamp: September 29, 2017, 08:33:48 pm
content: Way overkill for a mouse. I'd say an image sensor. From a mobile phone, perhaps? Or a camera?

author: psteichen
author_rank: Contributor
timestamp: September 29, 2017, 08:49:34 pm
content: Quote from: Benta on September 29, 2017, 08:33:48 pmPossible. It really does look like an image sensor of some sort. This is a picture I found online.Sent from my SM-G900P using Tapatalk

author: psteichen
author_rank: Contributor
timestamp: September 29, 2017, 09:26:35 pm
content: Would be great to find a datasheet to figure out how to use it. It says Japan on a side not visible in the photos, but that's the last text anywhere.Sent from my SM-G900P using Tapatalk
Identify this component? - Page 1
Forum section: electronics / beginners

author: dfitz1000
author_rank: Newbie
timestamp: April 15, 2014, 12:13:54 pm
content: Hi, can anyone help me identify the component in the attached pic and what it is for?It is part of a small battery pack (3 x AA cells in series) and it connects to the negative terminal of the pack and then to the white pin of the battery pack connector. Of the other two pins of the connector, the red one is connected to the positive terminal of the pack (obviously!) and the black direct to the negative terminal. I don't understand the point of this or what it is even!I couldn't measure any resistance with a cheap multimeter, seemed to be open circuit. Also didn't seem to be a diode when checked with the meter, I may be wrong.Any help appreciated!

author: Richard Crowley
author_rank: Super Contributor
timestamp: April 15, 2014, 12:18:41 pm
content: It is most likely a thermistor (or some kind of temperature-sensing device). Manufacturers put them into battery packs so they can monitor the temperature during charging. That is one way of accomplishing faster charging times, as one of the modes is to pump as much current into them as long as you stay under some maximum temperature.If that device is "open" then it is probably dead and would prevent the battery pack from being charged since the charger couldn't monitor the temperature. If you try to put too much current into the battery pack without monitoring the temperature, you could quite literally burn the house down.

author: dfitz1000
author_rank: Newbie
timestamp: April 15, 2014, 12:28:37 pm
content: Ok that makes a lot of sense now because the battery does not seem to be holding charge anymore. Thank you.

author: SeanB
author_rank: Super Contributor
timestamp: April 15, 2014, 07:47:57 pm
content: Itshould be around 10k at room temperature, and if the battery is not holding charge the cells are dead.
Identify this connector? - Page 1
Forum section: electronics / beginners

author: cdevidal
author_rank: Regular Contributor
timestamp: April 14, 2022, 03:23:03 pm
content: What is this called? Looks like a pin and a blade. I don't have access to it for measurements.

author: cdevidal
author_rank: Regular Contributor
timestamp: April 14, 2022, 03:23:39 pm
content: Here's another shot

author: Twoflower
author_rank: Frequent Contributor
timestamp: April 14, 2022, 03:32:58 pm
content: Looks like the old style connector for speakers: DIN 41529 (seehttps://www.farnell.com/datasheets/28817.pdf).

author: andy3055
author_rank: Super Contributor
timestamp: April 14, 2022, 04:54:52 pm
content: Yes, they were mostly used by Philips on their audio equipment for speaker connections. They make very poor contact after a while.

author: Terry Bites
author_rank: Super Contributor
timestamp: April 14, 2022, 06:01:57 pm
content: AKA the Blaupukt connector, they were annoying like all DIN connectors. You can still buy them, arrghh!

author: tooki
author_rank: Super Contributor
timestamp: April 14, 2022, 06:25:39 pm
content: Yep, definitely a DIN speaker connector.

author: cdevidal
author_rank: Regular Contributor
timestamp: April 14, 2022, 09:25:56 pm
content: Thanks all. I gather it was a crappy audio connector, but would it be suitable for an outdoor motor on a chicken coop door opener? It would rarely be plugged/unplugged. Female end would face downward and the motor would have the male pins. The motor would be fully enclosed. Vendor offered several plug types and this one looked the most weatherproof.

author: Benta
author_rank: Super Contributor
timestamp: April 14, 2022, 09:54:13 pm
content: It wouldn't be my first choice.OK, it's a low current application, but they're only tinned and for indoor use and will corrode.A gold-plated RCA-jack or something like that would be more to my liking.

author: themadhippy
author_rank: Super Contributor
timestamp: April 14, 2022, 10:20:49 pm
content: Id want something thats at least ip44 if theirs any chance of water getting anywhere near and preferable at least 65 ,something like a buccaneerhttps://www.bulgin.com/en/products/range/circular-power-connectors/standard-series.htmlor an xlr as its low voltagehttps://www.neutrik.com/en/product/nc3mxx-hd-dhttps://www.neutrik.com/en/product/nc3fxx-hd-b-d
Identify this connector - Page 1
Forum section: electronics / beginners

author: Mukrakiish
author_rank: Contributor
timestamp: May 08, 2017, 04:57:31 pm
content: You know how it can be when your searching for something but don't know the exact term to find the component you need (like in Digikeys fortress of parts).Picture here, the little BNC splitter used in this fellows setup.Figured one of you would know what this thing is called. I don't have such a handy thing on my bench just yet and would like to have one (using my BNC -> Gator clips and other related goods don't play nice with my Freq Gen to Scope connection).

author: electr_peter
author_rank: Unknown
timestamp: May 08, 2017, 05:12:02 pm
content: Try searching for"BNC to banana adapter". There are few configurations versions (female/male).

author: stj
author_rank: Super Contributor
timestamp: May 08, 2017, 05:13:38 pm
content: or BNC to 4mm jacks

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: May 08, 2017, 05:19:39 pm
content: Picture B with the circle , has an extra piece in it - but the picture is not big enough to tell what is there .Besides the BNC - banana adapter , so with the circle in the B picture - that is what figure your asking about , so need a better picture ?

author: Mukrakiish
author_rank: Contributor
timestamp: May 08, 2017, 05:55:51 pm
content: Quote from: KD0CAC John on May 08, 2017, 05:19:39 pmIn the second picture is a small SMD inductor that he is measuring (it's from a "how to identify unknown inductors" page).Thanks you guys for that, that makes so much sense now that you write it out. Should have known

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: May 08, 2017, 07:43:18 pm
content: If you need the type which does not only accept 4mm plugs, but which can connect single wires by screw-down, they often are listed as 'BNC-to-Binding Post' adaptors.

author: tablatronix
author_rank: Regular Contributor
timestamp: May 08, 2017, 09:11:20 pm
content: http://www.ebay.com/sch/i.html?_odkw=bnc+male+banana+4mm&_sop=15&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.Xbnc+male+dual+banana+4mm.TRS1&_nkw=bnc+male+dual+banana+4mm&_sacat=0or get a better quality pomona versionor even more $$$Fluke PM9082Never seen that metal old skool version for sale though.

author: Fraser
author_rank: Super Contributor
timestamp: May 08, 2017, 09:57:59 pm
content: I have some of the exact types pictured, with the offset ground connection socket. They are Philips part PM9051Fraser
Identify this connector please - Page 1
Forum section: electronics / beginners

author: BobbySmith
author_rank: Newbie
timestamp: January 15, 2022, 06:11:37 am
content: Would someone be able to help me identify what type of connector is the white one?It is from an old Mitsubishi air conditioning de00N110B PCB which i'm replacing.Thanks in advance

author: amyk
author_rank: Super Contributor
timestamp: January 15, 2022, 10:18:27 am
content: It's probably Japanese, so I would go look in JST's catalog.If you can measure the pitch, that will help narrow it down.

author: Nusa
author_rank: Super Contributor
timestamp: January 15, 2022, 10:28:47 am
content: The ruler is in the picture. Looks like it's the standard 2.54 mm (0.1 inch) pitch, or 5.08 mm from pin 1 to pin 3, since there is no pin 2.
Identify this F like coax connector / Metric F coax ?? - Page 1
Forum section: electronics / beginners

author: cybermaus
author_rank: Frequent Contributor
timestamp: November 26, 2014, 05:42:16 pm
content: HiI have a couple of connectors that I would have sworn are female F, but they are not.The thread is just a tad too big and a tad too fine. Specifically, the thread seems to be metric 10 fine (10x0.75)As close as they are, a real F will exactly not fit.Picture attached, but I doubt that helps, it just looks like a female F(In fact, its a female "F" to male N adapter)The thread diameter is 9.8mm (vs 9.2mm or 3/8 for real F)The thread pitch seems 0.75mm (vs .794 or 1/32 for real F)So that is a pretty good match, but not quite good enough.It seems to be some metric version of F, but I never before encountered that, nor can I find info on the web on it.Anyone has knows what this is. Or why? Or anyone ever encountered it?My theories:- a rare metric version of F (never seen before)- a purposeful adaption to separate a 50 Ohm F connector from the ubiquitous 75 Ohm F? (after all, they were in a 50 antenna system)- a bad copycat china factory offloading a batch of mistaken F clones (some engineer got an earful when the boss found they had a ton if these)They came on a few years old 900MHz GSM repeater/amplifier set (which works reasonable, provided you keep both antenna's really well separated)Thanks(PS: its not a problem. I'll just drop these in a bag labeled "NOT F !!"

author: Fraser
author_rank: Super Contributor
timestamp: November 26, 2014, 05:57:16 pm
content: Looks like an FME connector as used in mobile phone car aerial installations. Insulator is different though. I attach a picture of the male part that may mate to your female adapter. I have met F connectors that are a different thread to others so there may be more than one thread used on F connectors ?Aurora

author: cybermaus
author_rank: Frequent Contributor
timestamp: November 26, 2014, 09:08:44 pm
content: Thanks, but no, it does not seem to be FME.FME is smaller. Also the FME female part has a collar.Like these:And a similar female to N male would look like:
Identify this part please - Page 1
Forum section: electronics / beginners

author: tahp
author_rank: Newbie
timestamp: August 19, 2022, 02:37:25 am
content: Hello folks, I'm having a hard time sourcing what looks like a resistor. Hopefully anyone here knows.

author: ataradov
author_rank: Super Contributor
timestamp: August 19, 2022, 02:46:07 am
content: This is a 5 MOhm resistor.Just plug "5M0 resistor" into google and you will get a ton of results.The soldered resistor is 50 mOhm and they seem to be in parallel. This makes no sense.

author: srb1954
author_rank: Super Contributor
timestamp: August 19, 2022, 02:52:52 am
content: The soldering on the R005 resistor below doesn't look too great. I would touch up the soldering on that resistor as it looks to be a current sense resistor and probably carries a reasonable current.

author: gamalot
author_rank: Super Contributor
timestamp: August 19, 2022, 03:02:15 am
content: It's a 0.005 ohm resistor.

author: gamalot
author_rank: Super Contributor
timestamp: August 19, 2022, 03:05:01 am
content: Quote from: ataradov on August 19, 2022, 02:46:07 amI think R93/R94 are all 5 milliohm resistors.

author: ataradov
author_rank: Super Contributor
timestamp: August 19, 2022, 03:16:51 am
content: Quote from: gamalot on August 19, 2022, 03:05:01 amLogically it makes sense. But that would be the first time I see 5M0 used for 5 mOhm.And yes R005 is 5 mOhm, not 50.Also, the second one is clearly replaced. Those may be discharge resistors and the other one was also 5 Meg and got swapped with a complete opposite.

author: gamalot
author_rank: Super Contributor
timestamp: August 19, 2022, 03:43:25 am
content: Quote from: ataradov on August 19, 2022, 03:16:51 amYes, sometimes this is really confusing.I think 5 megohm chip resistors should be marked 505 or 5004 (actually 5 megohms are rare, even much rarer than 4.99 or 5.11 megohms, and 5 milliohms shunt is common).When people ask for help identifying components, it's a good idea to upload both a picture with details and a picture that shows the surrounding circuitry.

author: ataradov
author_rank: Super Contributor
timestamp: August 19, 2022, 04:21:11 am
content: I looked at the high value resistors I have. Yageo are marked as 475 for 4.7 MOhm.And it looks like Panasonic marks their 5 mOhm resistors "5M0". So yes, this is 5 mOhm for sure. Here it ishttps://www.digikey.com/en/products/detail/panasonic-electronic-components/ERJ-M1WSF5M0U/300452

author: tahp
author_rank: Newbie
timestamp: August 19, 2022, 04:38:58 am
content: Awesome guys, and for thr folks wondering. There's supposed to be another 5mo where the other resistor is sketchelly soldered. I'm trying to figure it out and make the best out of a Craigslist scam

author: ataradov
author_rank: Super Contributor
timestamp: August 19, 2022, 04:44:29 am
content: The resistors are matching, they are just from different manufacturers.The second one is pretty poorly soldered. They probably struggled heating up that copper plane. I would reflow it for sure.
Identify this part? - Page 1
Forum section: electronics / beginners

author: gyrfalcon16
author_rank: Contributor
timestamp: August 08, 2018, 05:51:34 pm
content: Anyone know what this is? Feel silly not being able to figure it out...Not a 871A fuse?

author: iainwhite
author_rank: Unknown
timestamp: August 08, 2018, 07:58:55 pm
content: I googled "871A" and came up with various sensors made by Allen-Bradley / RockwellMaybe something to do with that?

author: capt bullshot
author_rank: Super Contributor
timestamp: August 08, 2018, 08:05:52 pm
content: gas burner ignition electrode?

author: DC1MC
author_rank: Super Contributor
timestamp: August 08, 2018, 10:12:36 pm
content: Part of Carrier Bryant Furnace 58sx120-lg-1 3 Wire Gas Pilot Burner & IGNITOR 871A, so Capt B. is righthttps://www.ebay.com/p/Carrier-Bryant-Furnace-58sx120-lg-1-3-Wire-Gas-Pilot-Burner-IGNITOR-871A/7003708861

author: ArthurDent
author_rank: Super Contributor
timestamp: August 08, 2018, 11:26:09 pm
content: The previous replies are correct that it is the igniter electrode for a gas furnace. The end of the bent wire is where the spark jumps to a grounded metal part to ignite the gas from the pilot. Here is a stock photo of a similar assembly.

author: gyrfalcon16
author_rank: Contributor
timestamp: August 09, 2018, 02:16:03 pm
content: Quote from: DC1MC on August 08, 2018, 10:12:36 pmQuote from: capt bullshot on August 08, 2018, 08:05:52 pmQuote from: ArthurDent on August 08, 2018, 11:26:09 pmWow! Thanks... now that I look at it closer the wire does say 25KVDC in really small print that I missed seeing!I thought I salvaged it from a big UPS power supply so I wasn't even thinking electric igniter.

author: iainwhite
author_rank: Unknown
timestamp: August 09, 2018, 02:19:14 pm
content: lol - I was way off!
Identify Unknown SMD component. - Page 1
Forum section: electronics / beginners

author: Nyx_
author_rank: Newbie
timestamp: January 26, 2016, 07:57:32 pm
content: Hi. Good day.I'd like to ask if anyone can identify this SMD component by its marking.I searched using various methods, including just part of the marking, using the package, etc. But I'm still unsure of what part number it is.I appreciate if anyone can look into it and share any information.Thank you.

author: DivineChaos
author_rank: Regular Contributor
timestamp: January 26, 2016, 08:49:50 pm
content: Download NC7S04M5 datasheet fromFairchild Semiconductor

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: January 26, 2016, 08:51:19 pm
content: It looks like SOT-23-6 package but may not be. There are many SMD code tables on intrawebs but none seems to match - can you guess from the circuit what it is? MOSFET, Opamp? Regulator? Voltage reference?

author: Alexei.Polkhanov
author_rank: Frequent Contributor
timestamp: January 26, 2016, 08:53:11 pm
content: Quote from: DivineChaos on January 26, 2016, 08:49:50 pmCannot be - that one has SOT-23-5package not SOT-23-6like on photo.

author: DivineChaos
author_rank: Regular Contributor
timestamp: January 26, 2016, 10:49:15 pm
content: Could be a knockoff that added a pin for no reason. Test the component and see if it behaves like it

author: Nyx_
author_rank: Newbie
timestamp: January 27, 2016, 12:18:46 am
content: Hi. Thanks for the reply.I'll take a look at PCB connections and report back and I'll also try to extract it and test.I'll report back soon.
identify voltage regulators from TV LED board TNP4G549 - Page 1
Forum section: electronics / beginners

author: nickeevblog10
author_rank: Contributor
timestamp: December 13, 2018, 10:13:57 pm
content: AYI is the first clue I have to go on and will post photos of the different voltage regulators I want to test and possibly replace.It seems AYI no longer manufactures these parts because I can not find them on the internet anywhere.Part numbers on the different voltage regulators are: AYI 17NF 2 5 63181 316 and w29E20 5873 m1317 D6Since beginning this post to check on my research for these voltage regulators/diodes (made me think a bit) I have learned how to test these and now looking at replacements but still not sure about the specifications of these parts.These parts are TO252-3 packages?Any help will be much appreciated.These project I reported in an earlier post checking other parts on the TV LED board herehttps://www.eevblog.com/forum/beginners/a-kind-of-diode/msg1996220/#msg1996220

author: Nerull
author_rank: Frequent Contributor
timestamp: December 13, 2018, 10:31:08 pm
content: The logo you deciphered as "AYI" is ST, a pretty major brand. The ST17NF is an N-channel MOSFET.https://www.st.com/resource/en/datasheet/std17nf25.pdfThe W29E200 looks to be a rectifier diode, possibly a Chinese copy of this:http://www.mouser.com/ds/2/302/BYW29E-200-354845.pdfI can only find the exact part number on random chinese resellers and none of them seem sure what it actually is:https://ae01.alicdn.com/kf/HTB103VDSpXXXXXcaVXXq6xXFXXX9/1PCS-W29E20-TO252-IC.jpg

author: nickeevblog10
author_rank: Contributor
timestamp: December 13, 2018, 10:35:22 pm
content: Thanks so much.Now that I see ST I think I have seen ST somewhere recently while searching but I did not see AYI anywhere in a Search of eevblog forum, thank you.Have a good Christmas*
Identifying 4 terminal device on LED panel - Page 1
Forum section: electronics / beginners

author: genericpurpleturtle
author_rank: Contributor
timestamp: January 05, 2017, 10:24:54 am
content: Hello everyone, I've got this little LED PCB panel thing which has fifteen LEDs on it, three 0 ohm resistors and three 4 legged devices (circled in red the picture). I have no idea what the little 4 legged devices are though, or what their purpose is and was wondering if anyone had any ideas?I've tried googling the markings on the device with no luck; I think it says WGS71, where the S has a little line over the top of it and the 71 is at a 90 degree angle to the rest of the text.The only information about their behavior which may be of use that I have is that, I think the PCB is meant to be powered by 24V (not sure though, they were given to me without packaging), and if you gradually ramp up the voltage from 0V, first the 9 LEDs which I have circled in green come on dimly at about 8V and then become brighter. The last 6 only come on at about 13V, again dimly at first, then brighter.The reason I want to know, is that I'm trying to set up a an experiment where I drive the LED panel with a sinusoidal signal to find out what frequencies of flashing light at visible. I was going to use a op amp in a transconductive configuration decribed here:(http://www.allaboutcircuits.com/textbook/semiconductors/chpt-8/voltage-to-current-signal-conversion/) to convert a voltage signal from my signal generator into a current one. I wanted to know if these little 4 legged devices would cause unexpected behavior in the panel.Many thanks for any and all help

author: Ondre
author_rank: Unknown
timestamp: January 05, 2017, 08:26:07 pm
content: Hi,the package is a SOT143 or TO253. Digikey spits out some bridge rectifier with this package type. You could try to remove one from the circuit and check if they are diodes inside. The traces are a bit hard to recognize on the photo. Maybe you can try to draw the circuit diagram to see what's connected to what.Cheers

author: bktemp
author_rank: Super Contributor
timestamp: January 05, 2017, 08:44:00 pm
content: BCR402R: 20mA LED driver. Marking code is W6s and package is SOT143

author: orolo
author_rank: Frequent Contributor
timestamp: January 05, 2017, 09:01:34 pm
content: From the layout, you have three identical led strings. Each string is LED-R0-LED-LED-SOT143-LED-LED. The last two leds in each string are the last to turn on in your circuit. That suggests your mistery component is a resistive shunt:http://www.farnell.com/datasheets/39875.pdfsomething like this.
Identifying a 3-terminal SMD component marked "EATH" - Page 1
Forum section: electronics / beginners

author: shapirus
author_rank: Super Contributor
timestamp: April 10, 2024, 12:44:21 pm
content: Searching for "EATH" in google or other engines is hopeless because of false positives.I have no idea where these components came from, but I have two of them in my parts box, and they're packed in their original SMD tape. Was wondering what it could be.3 terminals (pins). Dimensions: 6.9 mm x 1.4 mm x 1.3 mm. Perhaps something high-voltage because of the elongated shape? Multiple diodes in series?Measures open circuit when tested for R, L, C, D.Photo:

author: amyk
author_rank: Super Contributor
timestamp: April 10, 2024, 01:43:58 pm
content: SMD crystal, e.g.https://abracon.com/datasheets/AEL-Crystals/ELS13.pdf