hybridfree/eevblog-posts huggingface dataset:
Help identifying chip - Page 1
Forum section: electronics / beginners

author: Jordanaudio
author_rank: Newbie
timestamp: April 10, 2024, 03:55:45 am
content: Definitely a beginner with a lot to Learn. I’ve got a Dell D6000 Dock that is shutting down the charger which I take to mean a short somewhere. I saw on my thermal camera this chip getting hot quickly before the charger shuts down. I believe this chip to be a MOFSET. I have searched for EMA2182 datasheet and come up dry.Charger no longer shuts down with this chip off the board. With DMM in diode mode, red on the pad/pins 5-8 and black on 1-4 in order I read 0.481 V, for 1-3 and open for 4. Then I go back to pin 1 and the readings are 0.002V for pins 1-3. With black on pins 5-8 it’s open.Resistance measures black on 5-8, red OL on 1-4. Red on 5-8 black on 1-3, 9.2 Mohm, 4 OL. Then 1-3 measure 1.6 Ohm.This seems like 4 is a gate being opened to ground?Is there an equivalent replacement for this chip?Thanks for your help!

author: aliarifat794
author_rank: Regular Contributor
timestamp: April 10, 2024, 07:51:16 am
content: Maybe it's a custom-made chip.

author: Ranayna
author_rank: Super Contributor
timestamp: April 10, 2024, 11:47:13 am
content: Looks like this one or very similar:https://alltransistors.com/adv/pdfview.php?doc=emb09p03v.pdf&dire=_1B09P03 was my searchterm.Edit: clarified link

author: Jordanaudio
author_rank: Newbie
timestamp: April 10, 2024, 12:51:25 pm
content: I’m willing and trying to learn. I’m fairly confident in that I don’t know enough to even know what I don’t know, if that makes sense. But all of my various “can I fix it?” electronics projects are “nothing to lose” propositions. The devices would just get thrown out anyway.With no schematics available that I can find, should I consider the possibility that this chip is doing what it’s supposed to do, opening to ground? Is that a thing? That would mean the short would be somewhere else after this chip. I’m willing to keep probing with the DMM but I’ll be doing so blindly.

author: Jordanaudio
author_rank: Newbie
timestamp: April 10, 2024, 06:22:58 pm
content: That’s interesting and begs the question, which may already be answered somewhere in this forum so apologies if it has, how do you know which of the numbers to search? I’ve struggled in the past with this issue on these “larger” chips that have multiple lines of text

author: Ranayna
author_rank: Super Contributor
timestamp: April 11, 2024, 07:09:02 am
content: Quote from: Jordanaudio on April 10, 2024, 06:22:58 pmIn this case, it was easy. You already tried the lower line of text and found nothing.That this is very likely a MOSFET, as you said, is obvious due to the layout.So my google term was "mosfet b09" and at that point google already suggested b09a03 and b09n03. Both find MOSFETs very similar to yours, including packaging and manufacturer logo, so it is easy to deduce that "p03" is a relevant part of the partnumber.

author: MarkT
author_rank: Frequent Contributor
timestamp: April 11, 2024, 07:24:58 pm
content: Looks like its EMB09P03V p-channel power mosfet, 30V, 9.5 milliohm.https://alltransistors.com/mosfet/transistor.php?transistor=49933
Help identifying circuit function - Page 1
Forum section: electronics / beginners

author: bitman
author_rank: Unknown
timestamp: December 17, 2018, 11:13:51 pm
content: I have a dead Raspberry Pi 3 B 1.2 that I'm trying to revive. It died with some magic smoke as it got overloaded driving a LED matrix. The attached image can be found as part of the total schematics here:https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3b_1p2_reduced.pdf.From my probing, it looks like DMMT5401 isn't healthy so I will replace it (E1->B1 is shorted). But before I do that, I initially thought this was a current mirror but I'm no longer sure of that because the two bases aren't connected. In particular R2 and R3 confuses me and what having different values would achieve. The current mirrors I've found all are B1->B2 and no resistors on the Collector side. So what is it that I'm looking at if it's not a current mirror?

author: gcewing
author_rank: Regular Contributor
timestamp: December 18, 2018, 12:06:00 am
content: The bases are actually connected, but I don't think it's a current mirror.The whole thing is designed to act like a diode with zero forward voltage drop, to prevent backward flow of 5V power. If it is powered from the right, R2 turns on the right transistor, which connects the gate of the mosfet to its source and keeps it turned off. When it is powered from the left, the left transistor conducts and raises the base voltage of the right transistor, turning it off. R3 then pulls the gate of the mosfet to ground, turning it on.

author: perieanuo
author_rank: Frequent Contributor
timestamp: December 18, 2018, 06:27:54 am
content: Hi,Without spice modeling, I think is just a power switch with some little retard function and kinda slow-start function.surely not current mirror.On the other hand, why 1% precision resistors ...I really disagree.Envoyé de mon iPad en utilisant Tapatalk
Help identifying component - Page 1
Forum section: electronics / beginners

author: Alpha_B
author_rank: Newbie
timestamp: October 31, 2019, 06:18:02 pm
content: Hello my dear experts!I am trying to repair this ilumination sensor from a Xerox scanner system.This sensor gives information to the controller about the intensity of the scanner light (Value: 1 to OFF and 50 to 150 to ON).This sensor have only 2 wires and with the voltimeter it gives roughly 14v. I don´t know how it "sends" the value to the controller.My main question is if anyone can tell me what the indicated component is. Is seems some sort of photoresistor?I send the photo with the component protection and without.Thank you in advance from Portugal!

author: amyk
author_rank: Super Contributor
timestamp: November 02, 2019, 02:40:07 am
content: Quote from: Alpha_B on October 31, 2019, 06:18:02 pmPhotodiode stack, i.e. a tiny solar cell?

author: Alpha_B
author_rank: Newbie
timestamp: November 02, 2019, 10:39:59 pm
content: Thank you very much!Thanks to you I found its a ceramic photoresistor!
Help identifying component - Page 1
Forum section: electronics / beginners

author: HomeLate
author_rank: Newbie
timestamp: November 19, 2020, 06:53:24 pm
content: Hi,I'm troubleshooting a rechargeable vacuum cleaner pcb and I came acros this component:Can anyone identify it? I think it is some sort of fuse, but I'm not sure. When I measure it, there isn't any continuity.Thanks!

author: pvsage
author_rank: Contributor
timestamp: November 19, 2020, 07:06:50 pm
content: That's an LED. Silk screen identifier is D1 and I see an anode bonding wire and a cathode marker. In the assembled product, there should be a light pipe or window so the LED can show some kind of status.EDIT: If you place your meter in diode mode, you should see a drop of 2-3V with the negative probe lead on the cathode pad.

author: HomeLate
author_rank: Newbie
timestamp: November 19, 2020, 08:51:09 pm
content: Thanks pvsage!It doesn’t give me a reading while other diodes on the same pcb do. Unfortunately I don’t know what type it is and I guess this led isn’t the cause of the issue. I’ll try to replace it and we’ll see what happens.

author: Zero999
author_rank: Super Contributor
timestamp: November 20, 2020, 08:02:28 pm
content: Quote from: HomeLate on November 19, 2020, 08:51:09 pmIt's unlikely to be the problem. The diode test function on your meter probably doesn't have a high enough voltage to turn on an LED. Try connecting it to a 5V power supply, via a 10k resistor. The cathode is probably the side near the green square, at the top left hand side of the component in your image. If it's a high efficiency modern LED, it will be reasonably bright. If it's an old LED, it will only visible in a dark room.
Help identifying component - Page 1
Forum section: electronics / beginners

author: Paranoid
author_rank: Newbie
timestamp: July 13, 2022, 09:34:30 pm
content: Hello,Could please someone help with with identifying this component, No luck with google.Thank you

author: tooki
author_rank: Super Contributor
timestamp: July 14, 2022, 05:18:22 am
content: The cathode line on one side makes it almost certain to be some kind of diode.
Help identifying component - Page 1
Forum section: electronics / beginners

author: Footy
author_rank: Newbie
timestamp: December 23, 2016, 06:18:23 am
content: Hey folks i need some help. I need to replace this burnt up part but can't figure out the details of it and was hoping some pros could help me out. Its a dvd drive pcb from an xbox 360 i'm trying to fix for my nephews. Any help would be greatly appreciated this things been stumping me for months. Thanks so much and i hope you're enjoying the holidays

author: ataradov
author_rank: Super Contributor
timestamp: December 23, 2016, 06:39:42 am
content: It is a tantalum capacitor. Too small to see the value.It looks like it says 106, which means it is a 10 uF capacitor, which would make sense there.

author: Brumby
author_rank: Unknown
timestamp: December 23, 2016, 09:12:51 am
content: This any better?

author: tatus1969
author_rank: Super Contributor
timestamp: December 23, 2016, 09:22:44 am
content: that looks like the input or capacitor of a linear regulator, both value and voltage rating should be uncritical. The marking is a bit irritating to me, but probably that is 100uF. But I would say, replace with a 100uF tantalum with voltage rating at least twice the output voltage of the power adapter.

author: Gyro
author_rank: Super Contributor
timestamp: December 23, 2016, 09:30:24 am
content: Looks like 100uF at 6V. Tantalum.

author: Footy
author_rank: Newbie
timestamp: December 23, 2016, 09:53:32 pm
content: Thanks SO much, guys. You're lifesavers. Beers' on me tonight!And i cant thank eevblog enough. I absolutely love the videos. I gotta get learn'd up so i dont get hung up on the simple stuff like this.
Help identifying component for eprom programming - Page 1
Forum section: electronics / beginners

author: BruceSans
author_rank: Newbie
timestamp: December 27, 2023, 10:30:17 pm
content: I am very new and untrained but trying to learn and appreciate any help available. I am trying to clone an eprom from one GM BCM to another. The chip is a microchip 9365217 as seen in the pic. The only thing I can find in google is that it is SOP-8. From everything I have read I need to remove from the pcb to read the info. The issue I am having is this chip is not listed as an option for my t48 eprom programmer. Anyone know which selection I should use?

author: CaptDon
author_rank: Super Contributor
timestamp: December 27, 2023, 10:50:58 pm
content: Do any of the motorhead forums list how the chip is configured? Is it 4K, 8K, 16K? it probably isn't much bigger as I think there isn't a huge bank of data needed. Remember though, these little 8 pin buggers can go up into the mega bits / bytes. I cloned GM E.C.U. ROMS / PROMS years ago and even changed data for customers who liked to experiment.

author: Z. Khalid
author_rank: Contributor
timestamp: December 28, 2023, 08:07:12 am
content: Try selecting M95040 ( EEPROM Serial-SPI 4K-bit 512 x 8 ) from STMicroelectronics, disable the manufacturer ID check option if needs be..

author: Ian.M
author_rank: Super Contributor
timestamp: December 28, 2023, 11:24:56 am
content: Microchip'sSerial EEPROM Cross Reference Guidesuggests that if the mystery chip cross references to a 95040 or 25040, its probably a 'house' numbered25LC040A, though the early date code implies it could also be a Microchip 25LC040 or if its a 5V logic BCM, even 25C040. The only significant difference between them is the max. clock speed and the min. Vcc.

author: BruceSans
author_rank: Newbie
timestamp: December 28, 2023, 03:43:18 pm
content: Not sure about the 4,8 part. I will try the recommended settings and will report back. Thanks everyone

author: BruceSans
author_rank: Newbie
timestamp: December 30, 2023, 09:55:09 pm
content: Success in reading chip on donor part. Used M95040 option. Was actually able to read while still in circuit. Thanks for getting me pointed in the right direction.
Help Identifying component/ manufacture  - Page 1
Forum section: electronics / beginners

author: ijchan223
author_rank: Contributor
timestamp: November 14, 2014, 10:15:27 am
content: Hi guys i need a bit of help help Identifying component or manufacture. I wasn't able to get a clear picture of it because the only way to see it is through a microscope but it is essentially a P with a circle around it (similar to an at symbol but with a p in the center ) and the marking it has on it is 58 JF DN. i have tried different lookup tables but the problem is that i can't even identify the manufacture .

author: PA0PBZ
author_rank: Super Contributor
timestamp: November 14, 2014, 11:43:09 am
content: It would probably be an amazing lot easier if you tell what package it is in.
Help identifying component, Voltage regulator?  - Page 1
Forum section: electronics / beginners

author: N4v4jo
author_rank: Newbie
timestamp: March 29, 2024, 04:19:03 am
content: Hi , the component in the picture attached is shorted and I need to change it. I cant find any data sheet for IC16C. The marking in the board reads VR1, so I believe it is a voltage regulator. But what type?.Thank you all in advance.PD. the component is in an old IPOD Hifi speaker.

author: Sol
author_rank: Newbie
timestamp: March 29, 2024, 08:21:46 am
content: Hello, maybe this TPS76316DBVT?Does the pin diagram match or not?

author: Terry Bites
author_rank: Super Contributor
timestamp: March 29, 2024, 09:00:41 am
content: Check here firsthttps://smd.yooneed.one/

author: CaptDon
author_rank: Super Contributor
timestamp: March 29, 2024, 12:29:31 pm
content: Be aware that the source of the short may be after the regulator.

author: N4v4jo
author_rank: Newbie
timestamp: March 29, 2024, 01:50:06 pm
content: CapDon, I used a thermo camera and this component is getting hot. Makes alcohol evaporate right away.

author: DavidAlfa
author_rank: Super Contributor
timestamp: March 29, 2024, 07:12:34 pm
content: But It will get hot if there's a short at the output.

author: N4v4jo
author_rank: Newbie
timestamp: March 29, 2024, 09:14:05 pm
content: DavidI will remove the two components that gets hot one at a time and recheck to find out which one of the two it is shorted.Muchas gracias.

author: DavidAlfa
author_rank: Super Contributor
timestamp: March 29, 2024, 09:33:26 pm
content: Marking "IC" could be a "RT9167-27CBR":https://www.repaircompanion.com/smd_code_search/ic?package=SOT23-5&pin_count=5Don't crop the image so much, the surrounding parts can give some hints.
Help identifying components - Page 1
Forum section: electronics / beginners

author: higginsdj
author_rank: Contributor
timestamp: April 30, 2025, 06:30:46 am
content: I have 2 SMD components I can't identify on a circuit board.The first is an ST product marked with LT next line GP142. They are used on data lines, 1 connecting the 2 data lines together and additional ones to connect each data line to ground. I am assuming some sort of filter.The second (the 2 devices with Blue and Yellow stripes) looks like resistors and connects the main power rail to ground right after the fuse (Main power rail source is a large capacity deep cycle 12v Battery)

author: fzabkar
author_rank: Super Contributor
timestamp: April 30, 2025, 06:55:33 am
content: LT appears to be a bidirectional TVS diode.SM6T12CA is one possibility, but there could be others. You need to check the dimensions.https://pdf.digi-electronics.com/pdf/2429/SM6T220CA-datasheet.pdfCould the other components be surge arrestors?

author: brut
author_rank: Newbie
timestamp: April 30, 2025, 07:04:36 pm
content: Could the yellow/blue striped components be a spark gap?

author: DavidAlfa
author_rank: Super Contributor
timestamp: April 30, 2025, 09:40:41 pm
content: https://www.vishay.com/docs/88912/diodesgroupbodymarking.pdfhttps://www.vishay.com/docs/88546/bym10-xxx.pdfJust a rectifier, a standard 1N4007 will fit just fine.

author: higginsdj
author_rank: Contributor
timestamp: May 02, 2025, 02:41:09 am
content: So what would be the purpose of these rectifier diodes connected to ground on a +12VDC input? The only thing I can think of is to remove any negative voltage from the line so a reverse polarity protection?

author: higginsdj
author_rank: Contributor
timestamp: May 02, 2025, 03:07:50 am
content: Sorry - 1 more component - 2 types one marked 030F and the other 050F. The 030F on 2 data lines and the 050F on the +5v line of a USB connector. I'm thinking some sort of fuse/filter since the data lines are 3.3v and the USB is 5v.
Help Identifying Components Please - Page 1
Forum section: electronics / beginners

author: Robbie010
author_rank: Contributor
timestamp: February 03, 2019, 04:16:00 pm
content: Hello all,I have a few components in my project amplifier that I can't seem to identify the values for, any help much appreciated!Small clear Capacitor? Only markings are 39F and a feignt red bandAll gray capacitors / resistors? marked EFM3 033Ohm 2%Unmarked Output Transistors, tested with Multimeter Continuity setting and only get reading on the case / collectorOrange capacitor? marked 1K 100-130?Thanks in advance.

author: Benta
author_rank: Super Contributor
timestamp: February 03, 2019, 05:55:29 pm
content: Quote from: Robbie010 on February 03, 2019, 04:16:00 pm

author: PA0PBZ
author_rank: Super Contributor
timestamp: February 03, 2019, 07:24:44 pm
content: Quote from: Robbie010 on February 03, 2019, 04:16:00 pm39pFQuoteEither 33 or 0.33 Ohm, trust your multimeter.QuoteI have no idea.Quote1nF
Help identifying connector on a universal laptop adapter - Page 1
Forum section: electronics / beginners

author: LinuxHata
author_rank: Frequent Contributor
timestamp: June 20, 2023, 07:59:03 pm
content: Hello.A friend of mine donated a bunch of "GISSARAL" branded laptop AC adapters.These have proprietary socket, in which you connect the specific adapter for specific laptop, including older magsafe and USB PD type connectors.The issue is that these adapters are lost, we only have a bunch of AC adapters only.Technically, I can open the adapter and solder the wires directly, but it won't have that great look again.As I estimated using DMM, the left and right pairs are Vss and Vdd and middle pin is Type C CC1 connector.I'm attaching picture of both socket and the plug which is missing. Maybe someone has an idea what type it is?

author: langwadt
author_rank: Super Contributor
timestamp: June 20, 2023, 08:30:33 pm
content: some variation of molex KK ?

author: LinuxHata
author_rank: Frequent Contributor
timestamp: June 20, 2023, 08:46:13 pm
content: No, it doesn't look like Molex kk - it is closer to some battery connectors can be seen on various drones.

author: langwadt
author_rank: Super Contributor
timestamp: June 20, 2023, 08:50:42 pm
content: Quote from: LinuxHata on June 20, 2023, 08:46:13 pmjst-xh?

author: LinuxHata
author_rank: Frequent Contributor
timestamp: June 20, 2023, 08:57:06 pm
content: No, these are longer and receptacles are concealed.I had a small drone with such socket, but it was 3 pin (2S battery). It was almost 10 years ago, so I forgot it's name, but it was orange logo on white background, if that helps.The 2nd from the left on the bottom row here is the closest match I can find currently (but this one has a lock)https://techmattmillman.s3.dualstack.us-east-1.amazonaws.com/wp-content/uploads/2021/01/alljst-1537x1000.jpg
Help Identifying COS6100M Scope Components  - Page 1
Forum section: electronics / beginners

author: Livermorium
author_rank: Newbie
timestamp: November 06, 2024, 08:03:11 pm
content: Hello EEV World! - Looking for help to ID these two old components from a COS6100M Oscilloscope.RESISTOR - 2BJ (H in diamond) 68 OhmTRANSISTOR - NEC C2371 L D 3ZThe Problem- The Trace on the scope is blinding. I adjusted the Sub Intensity Adjustment RV1141, and the trace is still insanely bright. I checked the Power Supply Circuit and found that Test Point 5 should be +150V, but is measuring 63.8V. On the power supply circuit I found some heat damage on the Resistor and Transistor in question (both in pic attached). Going to replace these components, haven't had any luck finding them online, any and all help is appreciated for this, my first post.I also attached the schematic of the Power Supply Circuit. I adjusted RV1211, the 12V adjustment point which influences all the other power circuits. It was at 12.6V, now nominal.https://archive.org/details/kikusui_COS6100M_E/page/n3/mode/2up

author: Haenk
author_rank: Super Contributor
timestamp: November 06, 2024, 08:11:03 pm
content: search for 2sc2371 - easily availablethe resistor is wirewound, maybe 2Watt, easy to source, too

author: coromonadalix
author_rank: Super Contributor
timestamp: November 07, 2024, 01:11:58 pm
content: this link is better full schematics and parts valueshttps://elektrotanya.com/kikusui_cos6100_oscilloscope_user_sm.pdf/download.html#dlname the parts placementQ1213 is the requested transistor, who act as a pre driver for Q1211, 2sc 1505, 150vdc lineR1124 would be your 68 ohms 2watts resistor ? you have 2x of them for the 12 vdc linescomment would be for the 150vdc line, check the zenner CR1213, C1213, C1214 ... don't change part(s) hoping it may / will solve your problems, do proper diagnostics BEFORE
Need help identifying diode / finding equivalent (probably solved) - Page 1
Forum section: electronics / beginners

author: pleocavee
author_rank: Newbie
timestamp: May 31, 2023, 05:57:08 pm
content: Hey all,I'm trying to identify this diode to replace a couple of them. The marking is B.2 with a sideways 5... but my searches don't pull up anything that matches that. This is on an LED strip circuit with control over the color of each LED.I removed a couple and tested them using a multimeter in the capacitor/continuity mode (I think) which stayed 1 in one direction and ~150 in the other. Is there a way to tell if these are zener diodes or regular?If you can help me find a suitable replacement diode with this information, that'd be perfect.I believe it's a SOD-123 packageLooks like the circuit is 3.3v at one pair of diodes and 3.5v at the other [removed both pairs of diodes to investigate more]There's 3 sets of circuits, one each to control R G and B. The problem was first noticed when green no longer workedI may try to just swap in some 1N4148 diodes...Attached a couple pictures, the diodes in question are center in the photos, and you can see one set has fried.Let me know if there's any other information I can provide!

author: Infraviolet
author_rank: Super Contributor
timestamp: May 31, 2023, 07:51:24 pm
content: Perhaps try to follow the traces and reverse engineer a schematic (continuity meter between exposed solder joints if the black board makes visual following too tough), then you'd be able to see what the diode is doing, which would let you know if it has some specialised purpose (zener for specific voltage or such) or if it is just serving as an ordinary diode which can be replaced by anything with the same footprint.

author: Manul
author_rank: Super Contributor
timestamp: May 31, 2023, 08:28:09 pm
content: It could be SS0520. But you should trace the circuit like Infraviolet suggested, because it's possible to make even more trouble by replacing parts without having real facts.

author: Jwillis
author_rank: Super Contributor
timestamp: May 31, 2023, 10:00:42 pm
content: Manul is correct. SOD123 B2 is a Schottky Barrier Diode.https://www.s-manuals.com/pdf/datasheet/s/s/ss0520-ss0540_wte.pdfThe sideways 5 is a production code. What it means is dependent on the manufacturer. Could be a batch code or date code.

author: pleocavee
author_rank: Newbie
timestamp: June 01, 2023, 02:31:35 pm
content: Thank you all for your help!I'm relatively new to circuitry so wouldn't be able to recognize components super well. The idea with tracing the circuit is to figure out the general lay out of components or also the specific component models being used and the voltage at different areas?I've ordered some SS0520, so will be able to swap them in next week.
help identifying diode in a switch mode power supply board (for LED TV) - Page 1
Forum section: electronics / beginners

author: electron_jj
author_rank: Newbie
timestamp: August 29, 2021, 04:15:41 am
content: Hi everyone, I am new to this forum. I would like to seek help on identifying a tiny diode in a switch mode power supply board in a Panasonic LED TV. The diode (D407 on the circuit board) has been circled in yellow in the attached photo. I have also attached the portion of the schematic with D407 diode highlighted in green. Unfortunately, this schematic diagram which I have found on the web does not provide any details on the components. The diagram only shows the circuits with no values stated for the components.I have desoldered the diode out of the circuit and measured it with DMM using diode mode and the voltage value is around 0.173 which I think it unusually low and may be defective. The reverse reads OL. The markings on the diode is IK4 6A. Many thanks for your help!

author: amyk
author_rank: Super Contributor
timestamp: August 29, 2021, 05:32:58 am
content: http://www.goodark.com/datasheet/schottky_barrier_rectifiers/schottky_barrier_rectifiers/1K2%20thru%201K6.pdfBut 0.17 Vf is not "unusually low" for a Schottky diode, and as it reads open in the other direction I would definitely say it is not defective.

author: electron_jj
author_rank: Newbie
timestamp: August 29, 2021, 10:58:10 am
content: Great, thanks!
Help identifying grab bag component - Page 1
Forum section: electronics / beginners

author: sloMoses
author_rank: Newbie
timestamp: July 25, 2014, 02:16:03 am
content: I am very new at electronics. I found this website from Dave Jones' very enthusiastic videos on Youtube. I appreciate his enthusiasm and passion for the subject.All I have is a breadboard, an Innova 3320 digital auto-ranging VOM and a cheap analog VOM to see analog meter sweeps when checking capacitors.I bought a grab bag of components from the internet. There were some binary counters, BJT transistors, some logic gate ICs, some LEDs and some SMT ICs. There were some pink, three lead components in there, too. I figured out that they are IR phototransistors. There were some LED looking things in there, too. I figured out that they are IR LEDs.There is another component that I haven't been able to figure out. Picture attached. I did some tests on this mystery component, much like I did with the pink phototransitors and IR LEDs. But, this mystery component is challenging me.Currently I'm thinking that it is possibly some type of IR reactive p-channel FET (are there such things?). The voltage drops and A --> C resistance constant makes me think it is not a BJT phototransistor.I didn't want to assume or guess anything, lest the magic smoke biloweth.Anyone have any ideas? The following picture shows what I have tested so far.

author: oPossum
author_rank: Super Contributor
timestamp: July 25, 2014, 02:50:07 am
content: Looks like an IR receiver module. It will detect an IR carrier typically at 36, 38 or 40 kHz.There are two common pinouts... Out / Gnd / Vcc and Out / Vcc / Gnd.I suspect that one is Out / Gnd / Vcc.

author: GabYoung92
author_rank: Regular Contributor
timestamp: July 25, 2014, 02:52:35 am
content: It just looks like an IR receiver module to meThe datasheet below shows a 22k pullup resistor on pins 'A' and 'C' so this might be likelyhttp://www.jaycar.com.au/products_uploaded/ZD-1952.pdf

author: sloMoses
author_rank: Newbie
timestamp: July 25, 2014, 12:41:53 pm
content: Perfect. Thanks for the help.

author: edy
author_rank: Super Contributor
timestamp: July 25, 2014, 01:14:05 pm
content: I have one of these too which I scavenged from a toy. My understanding is that it responds to a particular frequency by grounding the source through the output? So if I connect to 5v source and gnd, what am I looking for on the output pin to know the correct frequency was detected? A change from 5v to 0v? The signal that triggers it seems to be from a particular IR LED that is PWM to a set frequency, so the remote is only1 function (to trigger it or not). I guess you can't read the pulses or could you encode something on top of the signal depending on the on/off pulses?

author: Bukurat
author_rank: Regular Contributor
timestamp: July 26, 2014, 01:50:52 am
content: Quote from: edy on July 25, 2014, 01:14:05 pmLooking at the data sheet listed above it has an inverted logic level output. You will see a string of pulses on the output that correspond to the encoding sent by the IR remote. 0 when there is an IR signal present.
Help identifying MCU and RGB LED - Page 1
Forum section: electronics / beginners

author: zshift
author_rank: Newbie
timestamp: December 26, 2019, 10:25:58 pm
content: I bought a junk mechanical keyboard, and instead of getting rid of it, I wanted to try fixing it and getting it up and going again, but I'm having so much trouble finding replacement parts for it.The board markings:FK5338AL Ver1.1IFP350 13302The MCU markings:FK5338AL/US-111MCU looks like a TQFP-64 7mmx7mm package.The RGB LEDs have no visible marking on them. They are reverse mounted with holes in the PCB allowing them to shine through. Pinout is 1-common anode, 2-green, 3-red, 4-blue. I'm having trouble measuring the size, since it's so small, but my best guess is 1311 package size. It's SMD mounts with 2 pins jutting straight out on opposite ends.I also see an ICE interface, which after a quick google appears to be a debugging port for the MCU. I'm not sure how to use this, but any pointing in the right direction would be a huge help.

author: amyk
author_rank: Super Contributor
timestamp: December 26, 2019, 10:34:13 pm
content: It's likely a custom mask-ROM MCU. Your best approach is to reverse-engineer the pinout and connect your own MCU to the key matrix if you want to use that.
Help identifying motor + hookup how-to? - Page 1
Forum section: electronics / beginners

author: siraskalot
author_rank: Newbie
timestamp: March 18, 2015, 07:16:50 pm
content: Hello,I'm just getting started with robotics and have some experience building small line follower robots. I recently picked up a motor for free and would like some help:- Identifying what type of motor it is (stepper/brushed dc/other)?- A link to an online video or tutorial showing how to hook this type of motor up, preferable via an Arduino for some control.A picture of the motor specs is linked here:http://postimg.org/image/z8itwpgcb/f188afb9/Thank you!

author: Kohanbash
author_rank: Regular Contributor
timestamp: March 19, 2015, 12:50:45 pm
content: It looks like an AC motor.How many wires are coming out from the motor (or terminal screws).Do you know if it is from a washing machine or dryer?

author: albert22
author_rank: Regular Contributor
timestamp: March 19, 2015, 02:28:29 pm
content: From the label you can realize that is an AC motor 110v. And that it uses a capacitor of 20uF so it is an induction motor. Also called "squirrel cage" type. Its speed depends almost entirely on the line frequency. Rpms are shown for 50 and 60 Hz.It would have at least 3 wires where you must connect line, neutral and the capacitor.
Help identifying old TI IC - Page 1
Forum section: electronics / beginners

author: tinkerer124
author_rank: Newbie
timestamp: March 04, 2025, 01:45:39 am
content: Hello,I recently found an old bag of ICs from the 1980s ish and there are many of this chip that I cannot find any info on whether i search any numbers or use the TI lookup tool for part markings.It reads:158 2604BP 851380TSA 7905 H MALAYSIAIt also has 14 pins.Does anyone recognize this chip or a datasheet for an equivalent modern one? included is an image.Thanks in advance for any info.

author: squadchannel
author_rank: Frequent Contributor
timestamp: March 04, 2025, 01:59:06 am
content: I thought it was a Tek parts because of the 3 and 4 digit numbers, but 158- seems to be the part number used for crystal.MOD:found in IBM boardsMOD2:ho-ho-ho!https://github.com/retrotruestory/ibm

author: tinkerer124
author_rank: Newbie
timestamp: March 04, 2025, 02:34:33 am
content: Thanks for that! It makes sense as the other 80 ICs in the bag were all hex inverters. Now I just have to figure out what to make with 150 hex inverters…
Help identifying PCB mount HDMI compnant model/manufacturer  - Page 1
Forum section: electronics / beginners

author: barfdogg
author_rank: Contributor
timestamp: September 19, 2020, 04:19:01 pm
content: My grandparents recently asked me to help them with their bluray player and upon inspection I found that they had somehow smashed the HDMI connector on the back of the device. My plan to repair is to swap this component out with a new one, however I cannot seem to find a match when searching for the number on the back of the component, by browsing mouser, or trying to find a logo matching what is on the connector. I am thinking other brands will at the very least be close, but am worried about fitment. Can anyone identify the brand or component based on my pictures? Or at least confirm there are similar options I can peruse? The device also has a second HDMI output for "audio only" and I was considering swapping them if I cannot find a suitable replacement.It is an LG UBKC90Thanks!

author: barfdogg
author_rank: Contributor
timestamp: September 19, 2020, 04:45:09 pm
content: Thanks. I can't seem to find anywhere that will sell under 10000 of them for minimum order. Did you happen to see it with a low minimum order quantity?

author: barfdogg
author_rank: Contributor
timestamp: September 19, 2020, 05:14:59 pm
content: Excellent. I will buy another model and give it a shot. Thanks for your help.
help identifying power rail - Page 1
Forum section: electronics / beginners

author: ijchan223
author_rank: Contributor
timestamp: January 29, 2019, 02:49:47 am
content: https://photos.google.com/share/AF1QipNtatk7ysaoTZpNn9AwcoSJgYlZ0Bi2VYVoN4nQA9z7S6AX28mu2EgpeZ0KZVxcFg?key=dmhLc09lby1YOUIzaVVULXlDTVU5VHpNR3o3SVpRhi, i need help identifying a power track because we need a few more , it is 3 phaze 240v rail can't seem to make brand
Help Identifying Resistors on FNIRSI 1014D - Page 1
Forum section: electronics / beginners

author: ABDELAFOU
author_rank: Newbie
timestamp: September 16, 2025, 10:24:32 pm
content: Hello everyone,My name is Abdelafou Hoggui from Algeria, and I would greatly appreciate your help regarding an issue I encountered with my FNIRSI 1014D oscilloscope.During operation, I may have caused a short circuit that damaged two surface-mount resistors related to Channel 1 and Channel 2. After some checking, I confirmed that these resistors are 10 Ω and 100 Ω.At this stage, I still need to confirm their physical dimensions (SMD package sizes) to order accurate replacements.👉 Confirmed, those are the two resistors. Kindly provide their physical dimensions, as well as the dimensions of the 100 Ω resistors located directly above them, so I can source surface-mount replacements of the same size.I will attach a clear photo of the affected components for reference. Any additional repair suggestions or guidance would also be highly appreciated.Thank you in advance for your support.Best regards,Abdelafou HogguiEl Oued, AlgeriaPlease find below the links to the photos

author: Frequencymodulator
author_rank: Newbie
timestamp: September 17, 2025, 03:46:00 pm
content: Hello AbdelafouIt is hard to tell the package size of the resistors based on an image. I would guess that the 10 Ω is 0402 and the 100 Ω is 0603, but don’t take my word for that.You could measure the length and width of the resistor with calipers or a good ruler and find the case size that way.See this chart for example; "https://www.newmatik.com/knowledge-base/KB-EN-00928/resistor-case-sizes" ,or google for yourself there are a lot of tables...Greetings!

author: ABDELAFOU
author_rank: Newbie
timestamp: September 17, 2025, 11:11:43 pm
content: I contacted the company, and although their replies are a bit slow, I found out that the 10Ω resistor is actually 0805. I was really surprised, because it looks a bit smaller, more like 0603.
Help identifying SMD component - Page 1
Forum section: electronics / beginners

author: DreadfulGranola
author_rank: Newbie
timestamp: November 30, 2023, 12:06:50 am
content: I have a Fluke 99 Scopemeter Series II and just got a new screen in for it yesterday.I've installed it without any issue and can finally easily read the whole display!Of course, what I already assumed could be wrong with it was - the EL backlight doesn't work right.I once again opened my little-not-so-little Scopemeter to find andhopefullyfix the issue. I plugged it'sAC adapter into it and turned it on and found a component overheating on the digital board next to the EL backlight's transformer.https://imgur.com/a/4OtfUxXAfter seeing this I removed the component and placed it under a magnifying glass totryto read any information off of it.But the package decided to fall apart and I cant read all the numbers/letters off it.So this is all I really have of the package;https://imgur.com/a/LDSY2OGHowever, there is another component that is fairly similar thatmaybe the same or possibly close enough;https://imgur.com/a/j2WjBPYI need help to figure out what exactly this part is. Im trying to learn more about electronics and do more projects in it as currently, I'm moreon the mechanical side of things.Any help to a beginner would be greatly appricated!P.S. Sorry I cant get images to post normally. Cant get attachements to post properly or image links to work...

author: ArdWar
author_rank: Frequent Contributor
timestamp: November 30, 2023, 12:45:16 am
content: BCX54-16NPN Transistor, marking code BDNext time please provide context where that component camefrom. And no, just because two component looks the same doesn't mean they function similarly, or even anywhere close for this particular one

author: DreadfulGranola
author_rank: Newbie
timestamp: November 30, 2023, 12:55:16 am
content: Thanks! Its from a Fluke 99 Scopemeter's EL backlight circuit, don't know what exact ID it is, just know its part of that circuit. I figure it wouldn't be the same, just thought I'd mention it.Is there a resource I can use to better ID parts like this? I tried Googling it, but I may not have put in the right information.
Help identifying smd transistor in a Keithley 2110 - Page 1
Forum section: electronics / beginners

author: jdeth
author_rank: Newbie
timestamp: April 28, 2019, 06:05:33 am
content: I have a Keithley 2110 that has a bad transistor/fet Q209 f2C3A I have tried looking up the number several ways and come up with nothing.Any help would be greatly appreciated.

author: bdunham7
author_rank: Super Contributor
timestamp: April 28, 2019, 08:10:18 pm
content: https://www.sphere.bc.ca/download/smd-codebook.pdfMaybe some variant of a BC849 NPN transistor? You may have to dig a lot to find this. It helps to get lucky!

author: tozitom
author_rank: Contributor
timestamp: November 08, 2023, 05:55:19 pm
content: @jdethI came across you post when searching for a problem I have on my picotest M3511A (prety similar to your's.What was the fault on your's Keithley?
Help identifying some ICs - Page 1
Forum section: electronics / beginners

author: vmallet
author_rank: Regular Contributor
timestamp: October 22, 2019, 06:18:43 am
content: I have a couple of chips I'd like to identify. They are from an industrial motherboard by Sigmatek (Austrian company) from the mid-2000s.First chip looks like it would be easy but somehow I haven't found anything yet. 44 pins; I feel I have seen that logo but can't identify it.Next is something that looks like a custom IC by Sigmatek, made by Sharp. Am I hopeless here?These two black chips with "P85" on them are reasonably close to the power supply section of the board:Thank you!

author: Twoflower
author_rank: Frequent Contributor
timestamp: October 22, 2019, 06:39:18 am
content: The first one: The logo is Bosch. And here's one place call the device "40007 BOSCH LQFP44 0272240007 CC770 Series Stand Alone CAN Controller". Hope that helps as starter for your search.Edit: here's the product page:http://www.bosch-semiconductors.com/automotive-system-ics/in-vehicle-communication/cc770/

author: vmallet
author_rank: Regular Contributor
timestamp: October 22, 2019, 09:42:19 pm
content: Quote from: Twoflower on October 22, 2019, 06:39:18 amThat's great thank you, yes that was one key chip I was missing.This board has 78 ICs and I've identified most of them, I just have these few chips left above. I'm working off pictures and can't do continuity tests at the moment. Slowly but surely.

author: Dmeads
author_rank: Regular Contributor
timestamp: October 22, 2019, 10:23:58 pm
content: the bottom pic looks like an SOT (small outline transistor) package. and since they are near the power supply section, they might just be transistors. Also the large pad on the top of the package I think can be used for heat sinking and can be a collector or a drain in a transitor (just more thoughts to support the transistor theory).hope his helps

author: Yansi
author_rank: Super Contributor
timestamp: October 22, 2019, 10:26:26 pm
content: The Bosch one is mooore than likely a piece manufactured by STMicroelectronics. The font is a dead giveaway and ST and Bosch are quite friends in both automotive and industrial comms.//EDIT: Typo.

author: amyk
author_rank: Super Contributor
timestamp: October 23, 2019, 01:31:02 am
content: The two-line SOT89s with BK on the top (the bottom line is a date/batch code) are BCX56-10.

author: vmallet
author_rank: Regular Contributor
timestamp: October 23, 2019, 05:07:27 am
content: Thanks for all the replies. At this point I have figured out all the chips except for the custom Sigmatek chip.Quote from: amyk on October 23, 2019, 01:31:02 amI had bumped into this one but dismissed thinking it wouldn't "just" be a transistor... But looking more closely at the datasheet it's all there with the markings and everything. Thanks!

author: Jwillis
author_rank: Super Contributor
timestamp: October 23, 2019, 06:05:35 pm
content: Is it possible that the Sigmatek chip is a Real Time Ethernet VARAN Bus.For some reason,that's how I keep getting pointed to when I do searches.
Help identifying surface mount inductors - Page 1
Forum section: electronics / beginners

author: matthuszagh
author_rank: Frequent Contributor
timestamp: August 02, 2023, 05:00:46 am
content: I'd like to track down the yellow surface-mount inductors (L1 and L2) in the attached photo. Does anyone know the part number for these? I received this photo and unfortunately don't have the populated PCB in front of me, though I do have a bare board. The silkscreen outline is about 6x6mm and the pads are about 2x4.25mm. The outer edge of one pad to the other is about 7.6mm. I've searched around for a while now, and unfortunately I'm not seeing much relevant with the terms 473k (is that maybe 47uH?).Thanks!

author: srb1954
author_rank: Super Contributor
timestamp: August 02, 2023, 06:19:49 am
content: Quote from: matthuszagh on August 02, 2023, 05:00:46 amOne has the Siemens & Matsushita logo on it and the other looks like the EPCOS logo, the successor to S & M.They look like they could be Siemens SIMID03 (1812 size) chip inductors. According to an older data sheet the marking is in nH so I would say the inductance is 47x103nH = 47uH 10%.
Help identifying the component - Page 1
Forum section: electronics / beginners

author: randomusername1612
author_rank: Newbie
timestamp: January 05, 2023, 03:07:12 pm
content: I'm searching for a replacement part for the component circled in the picture. (its package is SOT-23-6, I guess)But I couldn't find a thing about it.By how it was placed in the PCB, I think it is a linear voltage regulator, and it has some kind of feedback on pin 5Does anyone know this part ?ps: Sorry, English is not my first language.

author: inse
author_rank: Super Contributor
timestamp: January 06, 2023, 07:31:23 am
content: Possibly Vishay Si1869DH? The connection of pins two and three would match…Got the hint from here:https://www.s-manuals.com/smd/vc

author: randomusername1612
author_rank: Newbie
timestamp: January 06, 2023, 02:36:25 pm
content: Quote from: inse on January 06, 2023, 07:31:23 amyep, that makes sense !Thank you so much !
Help identifying these connectors - Page 1
Forum section: electronics / beginners

author: nick1911
author_rank: Newbie
timestamp: January 19, 2018, 04:24:05 pm
content: Hello all;Long time lurker but first time poster here. I'm working on building out some circuit boards for some training equipment I'm doing for the local community college as a volunteer project. I'm trying to identify a particular connector, as I'll be needing to use it to swap the training board into the existing equipment. It's a round connector soldered to the board that accepts a rigid pin. I've taken some photos of it, which can probably describe it better then I can in words.I've been poking at digikey for a while, and I'm just not quite sure what this guy is called. Any help would be greatly appreciated!Thanks!

author: amyk
author_rank: Super Contributor
timestamp: January 20, 2018, 01:52:42 am
content: PCB mount female bullet connector.
[SOLVED] Help identifying this chip: 92M302 - Page 1
Forum section: electronics / beginners

author: airlomba
author_rank: Contributor
timestamp: April 14, 2016, 08:51:16 pm
content: Hello all,I have a bunch of chips from ST with the following markings, and I can't find any datasheet or document on the Internet.The markings are:9241ST92M302Have a look at the photo of one of the chips.Thank you for any help.Best regards,Emmanuel.

author: airlomba
author_rank: Contributor
timestamp: April 14, 2016, 09:07:50 pm
content: Woooow!!!! How is this possible?!Reading back my post and looking at the picture, it ocured to me that the "1" in 9241 could be an "I"... Googled it, and boom!!!!Unbelievable!!! In fact, these ICs are TS924 - Rail-to-rail ouput current quad OpAmps.Why did I take so much time (days) before thinking this way? Unbelievable! I have been thinking to myself that I should ask on this forum...Well, I got the answer.Sorry folks for any time you spent on this.I am not erasing this topic, hoping that, maybe this episode can teach some people to always look at things from different angles.Best regards,Emmanuel.
Help identifying this chip - H3601 - Page 1
Forum section: electronics / beginners

author: u666sa
author_rank: Frequent Contributor
timestamp: November 21, 2023, 05:42:34 pm
content: H3601 what is that? Some sort of flash rom?Perhaps datasheet? Searched ali, ebay, google, nothing.

author: darkspr1te
author_rank: Frequent Contributor
timestamp: November 22, 2023, 09:31:27 am
content: The BL24c64 is a 64kbit eeprom ,https://datasheetspdf.com/datasheet/BL24C64.htmldont know about the other 8 pin chip.darkspr1te