hybridfree/eevblog-posts huggingface dataset:
Help identifying IC manufacturer - Page 1
Forum section: electronics / projects

author: tree
author_rank: Regular Contributor
timestamp: June 21, 2014, 01:48:56 am
content: I'd very much appreciate if someone could identify the manufacturer logo on this IC.Thanks!

author: edpalmer42
author_rank: Super Contributor
timestamp: June 21, 2014, 02:12:43 am
content: That's the old logo for National Semiconductor - now part of Texas Instruments.http://www.embeddedlinks.com/chipdir/c/n.htm#nsEd

author: tree
author_rank: Regular Contributor
timestamp: June 21, 2014, 02:16:46 am
content: Oh okay. Thanks. I thought they had that big, fat, curvy "N". Anyway, I appreciate that link; it's very helpful!

author: calexanian
author_rank: Super Contributor
timestamp: June 21, 2014, 05:47:34 am
content: Hey, an LM311. There is an "oldie but goodie" jellybean!

author: Neganur
author_rank: Unknown
timestamp: June 21, 2014, 12:22:42 pm
content: I think my favorite logo websites are these two:http://info.electronicwerkstatt.de/bereiche/bauteile/ic_logo/http://www.dobbertin-elektronik.de/programm/logos/logos.htm
help identifying IC - Page 1
Forum section: electronics / projects

author: GrahamC
author_rank: Contributor
timestamp: August 18, 2015, 01:27:29 pm
content: Good day all,I recently obtained a SPC Electronics KU ban PLL LNB with interenal reference model SPCR5300CN with an LO of 10GHz.This looked like an interesting piece of kit to play around with on amateur 10GHz. Well made die cast casing WR75 flange for feed horn, N connector (50 ohm).I just can't resist taking the covers off of something before I start playing and of course I did. Inside there looks to be a pretty nice 10.0000 MHz TCXO as it's internal reference and a 16 pin SSOP IC which I am guessing is a PLL. The IC is marked CM069ub 72k 0527I am guessing that the 0527 is perhpas the 27th week of 2005 but I can't through a number of internet searches find anything for CM069ub (zero) or CMO69ub other than an obscure reference to a TI CD4046 part.Any ideas on what the CM069ub is? Manufacturer? Datasheet?cheers, Graham ve3gtc

author: TheElectricChicken
author_rank: Frequent Contributor
timestamp: August 18, 2015, 01:49:13 pm
content: a picture is often helpful in identifying the IC's. Can you attach one ?

author: GrahamC
author_rank: Contributor
timestamp: August 18, 2015, 02:17:02 pm
content: Agreed, a picture is always nice but unfortunately I don't have one, never thought to take one when I had the cover off. I have also done a search to see if anyone else has ever posted a picture of the PCB but had no luck with that either.There are no other identifying marks other that what I have already described.It is a simple 16 pin TSSOP chip.I will take a picture later this evening when I am home.cheers, Graham ve3gtc

author: TheElectricChicken
author_rank: Frequent Contributor
timestamp: August 18, 2015, 02:39:55 pm
content: one like it would be cool. Of course, if it was exact, then you'd probably have found it

author: GrahamC
author_rank: Contributor
timestamp: August 19, 2015, 11:02:03 am
content: Mystery solved.I couldn't see the forest for the trees. Turns out my mystery IC is in fact just a Texas Instruments (TI) CD40469 14 pin TSSOP (I couldn't count before as I was reporting as a 16 pin device) hex CMOS inverter.cheers, Graham ve3gtc
Help identifying magnetic angle sensor - Page 1
Forum section: electronics / projects

author: Tadas
author_rank: Contributor
timestamp: April 09, 2024, 04:00:09 pm
content: Image 1 - the part I'm looking is from BMW "eccentric shaft sensor"Image 2 - Inside there's two of these chips.Image 3 - removed chip with 5 pins.There's similarly looking KMA215, but it has 3 pins.This chip has 5 and other than power supply pins it also needs a clock signal (found in docs and one youtube video of someone probing it in a car with scope). It'd be interesting to see datasheet and learn about data protocol.Thanks!

author: Tadas
author_rank: Contributor
timestamp: April 09, 2024, 04:17:16 pm
content: Right, I may have found it:https://www.nxp.com/docs/en/data-sheet/KMA200.pdf5 pins. Power pins match (figured out from decoupling caps). Other pins are chip select, data clock, data.
Help identifying Molex connector - Page 1
Forum section: electronics / projects

author: Dan_8123
author_rank: Contributor
timestamp: December 22, 2023, 08:27:22 pm
content: Can anyone identify the attached connector? I need to order replacements for some old equipment but I cannot figure out the order number.It seems to be an assembly consisting of 2 dual-blade segments and two end-pieces/side guides. Pretty sure it's the EXTreme Ten60 series with the two center segments probably beinghttps://www.molex.com/en-us/products/part-detail/464379202They do have a complete 4-blade version but the pitch isn't correct:https://www.molex.com/en-us/products/part-detail/1724570004Can't find the end-pieces/side guides and when I contacted Molex they were less than helpful

author: ArdWar
author_rank: Frequent Contributor
timestamp: December 22, 2023, 10:52:17 pm
content: https://www.digikey.com/en/products/detail/samtec-inc/ET60T-D02-0-00-D02-L-R1-S/10217939This is actually 2-0-2 blade configuration instead of 4 blade

author: Dan_8123
author_rank: Contributor
timestamp: December 22, 2023, 11:10:47 pm
content: Thank you so much!
Help Identifying Mystery Protocol - Page 1
Forum section: electronics / projects

author: Rerouter
author_rank: Super Contributor
timestamp: June 15, 2017, 12:35:04 pm
content: I have an old bit of hardware that the diagnostic tool is beginning to go intermittent, and its potted, making me think, can i build a replacement.But first i am trying to figure out what standard (if a standard) it may be?Physically it is a 1 wire bus with a 10K pullup to 24V, and an open collector to send on the device sideThe interface is used to read out diagnostics from an automotive controller from roughly 1995Pulled out the logic analyser, and protocol.png shows what i am seeing.So far what i have worked out is, its 1 bit per ms, or 1000 baud,every 32ms it pulls low for 450us which i am going to assume is packet startIt then sends 31 bits encoded like belowpull low for 90us for i assume a 0 value,pull low for 275us for i assume a 1 value.ending in "0101" or "0000" if the device is in reset it only logs "0000" on the last 4, so i am guessing an ACK / NACKA few of my crude decodings hint at values being stored in groups of 7 bits, this is how i have roughed out my excel sheet in the decode picturehowever that would imply the start bit gets read as a 0 in all cases (7x4 + 4 = 32) as such on my excel shee i have added a 0 to the front of the binary.Any insight if you have seen such a thing before, and any thoughts on an implementation other than bit banging?

author: max_torque
author_rank: Super Contributor
timestamp: June 15, 2017, 07:20:30 pm
content: Is it a GM or Ford ecu by chance? Running one of the J1850 PWM protocols?

author: Rerouter
author_rank: Super Contributor
timestamp: June 17, 2017, 01:16:37 pm
content: Its out of a seimens brand device, an electronic throttle controller.but its a general purpose device produced by seimens,It does very much resemble a PWM protocol, but doesnt look to decode the same, and has a much lower baud rate than the standard,I've gotten a defective device (damaged output) that i can play with, so will attach a logic probe to the devices internal TX line to try and tease out some more info on the protocol.
Help Identifying old IC - Page 1
Forum section: electronics / projects

author: MatCat
author_rank: Frequent Contributor
timestamp: January 18, 2014, 08:13:38 am
content: I am fairly sure it's a video DAC, but I can't find it to verify / get datasheet, thanks!

author: 0utsider89
author_rank: Newbie
timestamp: January 18, 2014, 08:16:31 am
content: WOW my Samsung S3 takes good pictures. I took them for matcat.

author: electronupdate
author_rank: Regular Contributor
timestamp: January 18, 2014, 08:39:47 am
content: Perhaps a tdc1048 from trw. If you google "TDC1048" a data sheet for an 8 bit ADC comes up which appears to match the photo.

author: amyk
author_rank: Super Contributor
timestamp: January 18, 2014, 11:52:54 am
content: Agree with the TDC1048. AD9048 is a compatible replacement. Looks like this had some military applications, so it's a rather rare and expensive component...

author: MatCat
author_rank: Frequent Contributor
timestamp: January 18, 2014, 05:05:11 pm
content: Thanks! Don't know how I missed that blaring 1048 right on the front, actually I did search for the 1048J6C and never thought to remove the J6C part!
Help identifying plastic in Turtle Beach headset needing repair - Page 1
Forum section: electronics / projects

author: splin
author_rank: Frequent Contributor
timestamp: March 28, 2017, 09:30:26 pm
content: Hope this isn't too far off topic but my son has snapped a pivot on his Turtle Beach X12 headset which allows the ear cup to swivel +/- 15 degrees or so. There isn't much area for gluing it and it is under quite a lot of strain so I need to use the best possible glue. I can add a little mechanical reinforcement using bits of thin piano-wire at the sides.Does anyone know what type of plastic this is likely to be? The only marking I can see is L3 but I don't suppose this will be a type marking. For what its worth its a black thermosplastic with parts that clip together and fairly rigid. Finding the melting temperature will be tricky.Also what type of glue would you suggest?

author: DTJ
author_rank: Super Contributor
timestamp: March 29, 2017, 01:57:36 am
content: I cant help with the plastic ID but last time I did this type of repair I drilled both parts and inserted a metal dowel between them to provide some strength.Alternately if there's enough meat, maybe drill and tap both sides and use a cut off section of M2.5/3/4 screw thread to hold them together.

author: amyk
author_rank: Super Contributor
timestamp: March 29, 2017, 11:36:14 am
content: I would guess either ABS or polystyrene, but you can find plenty of online guides on how to identify the various plastics.
Help identifying power connector. - Page 1
Forum section: electronics / projects

author: soul40k
author_rank: Newbie
timestamp: February 24, 2017, 02:52:18 pm
content: Hey all,My work picked up a nice loader for testing some new stuff we are building, however it was just the unit, and no cables came with it. The unit itself is a Power-One TE-16 Multiple connection laboratory loader, I have problems finding anything about the unit itself lol.Wondering if anyone had maybe even a name for the type of connector I would be looking for. Attached a picture of the ports.Approximate dimensionsInner pin diameter: 7.5mmOuter wall diameter: 20.5mmDepth: 37mmThanks for your time.
Help Identifying Power Connectors on RF Amplifier - Page 1
Forum section: electronics / projects

author: canadaboy25
author_rank: Regular Contributor
timestamp: May 07, 2024, 06:27:35 pm
content: Does anyone know what type of connectors this RF amplifier is using for the power input?Is there an actual connector or are they just posts to wrap and solder wires to?

author: RFDx
author_rank: Regular Contributor
timestamp: May 07, 2024, 07:33:13 pm
content: Quote from: canadaboy25 on May 07, 2024, 06:27:35 pm

author: Kim Christensen
author_rank: Super Contributor
timestamp: May 07, 2024, 07:51:51 pm
content: Yup, just posts to wrap and solder a wire to... Though, the positive Vcc "post" looks like a feedthrough capacitor.

author: TimFox
author_rank: Super Contributor
timestamp: May 07, 2024, 08:17:48 pm
content: The Vcc post is either a feedthru capacitor or an LC filter in a similar package.

author: tooki
author_rank: Super Contributor
timestamp: May 08, 2024, 12:22:17 am
content: Quote from: canadaboy25 on May 07, 2024, 06:27:35 pmYes, except that you don’t really wrap around them. They’re formally known as “turrets” and this is how you solder to them:

author: vk6zgo
author_rank: Super Contributor
timestamp: May 08, 2024, 02:27:48 am
content: Quote from: TimFox on May 07, 2024, 08:17:48 pmOr, as I suspect, just a plain old insulated terminal.

author: DimitriP
author_rank: Super Contributor
timestamp: May 08, 2024, 02:43:24 am
content: Here is what mini-circuits has to say on the subject covering both IPC-A-610 and NASA-STD 8739.3 :Quotehttps://www.minicircuits.com/app/AN40-010.pdf
Help Identifying Resistor Value - Page 1
Forum section: electronics / projects

author: Rofflesaur
author_rank: Contributor
timestamp: March 03, 2017, 05:41:17 am
content: While diagnosing a failed fluorescent light dimming circuit, I came across this strangely marked wire-wound resistor. The bands are: Black-Green-Silver-Gold-Black. I'm assuming the last band might be temperature coefficient? Why would the first band also be black? That makes no sense to me. It measures 1.53 ohms, which is slightly more than the resistance of the leads themselves. No physical damage that I can see. I have no idea what the value should be. Even if you ignore the first black... 0.05 ohms? What? Nothing makes sense!

author: bktemp
author_rank: Super Contributor
timestamp: March 03, 2017, 07:36:16 am
content: It is probably a fuseable resistor (basically a resistor with a controlled failure mode, going open circuit without starting a fire). That is what the last band means.But I have no idea why the first band is black. Maybe it changed colour over time? brown-green-silver is the correct marking for 1.5 ohms.

author: Rofflesaur
author_rank: Contributor
timestamp: March 03, 2017, 07:55:36 am
content: Pardon my ignorance (I'm here to learn after all). I calibrated my Agilent DMM and learned how to use the null function. Reads exactly 0.05 ohms, which I believe would be correct if you counted the first black band as zero. Which brings me to my next question... why? This resistor is in series with a 4.7 megaohm SMT resistor. I don't see the point.

author: alanb
author_rank: Frequent Contributor
timestamp: March 03, 2017, 09:04:02 am
content: Are you sure that its a resistor and not an inductor?

author: bktemp
author_rank: Super Contributor
timestamp: March 03, 2017, 11:26:13 am
content: I have never seen a resistor marked this way, but it makes sense, otherwise it would be impossible to go below 10 * 0.01 = 0.1ohms.Are you sure it is connected to nothing else?Could it be used as a current sense resistor with the other resistor acting as protection/filtering the voltage drop?

author: amyk
author_rank: Super Contributor
timestamp: March 03, 2017, 12:17:05 pm
content: Quote from: Rofflesaur on March 03, 2017, 07:55:36 amAre you sure there's no other components connected to the same net as it?

author: MickM
author_rank: Regular Contributor
timestamp: March 03, 2017, 06:25:11 pm
content: That is a coil.You can actually see the windings, so it's a small one.Black = 0, Green = 5, Silver = .01, Gold is 5%.So the value is 0.05 uH 5%

author: bktemp
author_rank: Super Contributor
timestamp: March 03, 2017, 09:57:17 pm
content: Quote from: MickM on March 03, 2017, 06:25:11 pmNo, it is a wirewound resistor. The windings you see are the resistance wire. Fairly common for power resistors.Even an aircore inductor would have more than 50nH, since 10mm of straight wire has already about 10nH.
Help Identifying Several Parts - Page 1
Forum section: electronics / projects

author: docmur
author_rank: Regular Contributor
timestamp: April 01, 2015, 02:33:54 pm
content: Hey GuysI'm reverse engineering a circuit and I'm stuck on three parts. The first is a Zener Diode from General Semiconductior, the CR-28A, which I can't find the datasheet for. I'm just assuming the silk is correct on the board.The other two parts of transistors of some kind which I can't seem to locate. I've attached a picture of the two transistors.Does anyone know what these are?ThanksDocmur

author: Isad
author_rank: Frequent Contributor
timestamp: April 01, 2015, 02:43:17 pm
content: Quote from: docmur on April 01, 2015, 02:33:54 pmWell the G1 is a NPN BC848A.And the other on i just can figure out what the lastcharachter in the other packeg is i can only read 1jbut if that is 1j2 then its a PNP SO2907.
Help Identifying some really old IC's - Page 1
Forum section: electronics / projects

author: mcconkeyb
author_rank: Contributor
timestamp: November 29, 2016, 10:36:25 am
content: In the back of my old parts bins I have found about 100 old 14 pin Dips that are marked "N8H90A" with date codes that vary from 7120 to 7648. I have spend a long time googling this chip and I have not found anything. There is also a square S below the "N8H90A" part number and my guess is that Signetics may have made these. Anyone out there know what these are, and where I can get a datasheet for them???

author: rf+tech
author_rank: Frequent Contributor
timestamp: November 29, 2016, 03:12:33 pm
content: Hi mcconkeyb,Your description of the Signetics logo is spot on. Not only do I remember these Signetics 8000 series parts, I actually used them when they were new.The 1972 edition of the Signetics Digital databook can be downloaded from the link below:http://www.textfiles.com/bitsavers/pdf/signetics/_dataBooks/1972_Signetics_SSI_8400_8800_TTL_DTL.pdfThe 8H90 is the high speed version of the 8890 TTL hex inverter.RF+ Tech
Help identifying this connector - Page 1
Forum section: electronics / projects

author: zapta
author_rank: Super Contributor
timestamp: November 11, 2013, 02:24:37 am
content: I am trying to find a source for this connector. It is a 3 wire 0.1" spacing connector that fit into a 3 pin header. Note the extra plastic at one end that is used to key the connector. This connector is from a European car and carries GND, +12V and a LIN busEdit: I measure the pitch as ~0.1". Possibly it can also be 2.5mm.Thanks,Z.

author: tsmith35
author_rank: Frequent Contributor
timestamp: November 11, 2013, 03:48:39 am
content: Quote from: zapta on November 11, 2013, 02:24:37 amWhat brand/year of European car?

author: Kryoclasm
author_rank: Regular Contributor
timestamp: November 11, 2013, 04:41:44 am
content: Is there any written info embossed on the connector? maybe a maker mark?

author: zapta
author_rank: Super Contributor
timestamp: November 11, 2013, 04:57:26 am
content: Quote from: tsmith35 on November 11, 2013, 03:48:39 amIt's a recent model from the VW group.

author: tsmith35
author_rank: Frequent Contributor
timestamp: November 11, 2013, 05:36:30 am
content: Does it have anything to do with the radio?
Help identifying this part (FET?) - Page 1
Forum section: electronics / projects

author: mike449
author_rank: Contributor
timestamp: August 30, 2024, 12:25:08 am
content: A few pieces of reel tape with these was thrown away at work. Presumably power FETs, but I can't get any clue.

author: bostonman
author_rank: Super Contributor
timestamp: August 30, 2024, 01:11:48 am
content: I can't locate a part number break down, but this seems like it:https://www.alldatasheet.com/datasheet-pdf/view/915862/VISHAY/SQJA84EP.html
Help Identifying this part - Page 1
Forum section: electronics / projects

author: manytoolsmike
author_rank: Contributor
timestamp: August 15, 2022, 11:36:36 am
content: Hello Everyone,These components where in series with an ultrasonic transducer. It was all potted so this was the best I could manage to not destroy them. I am assuming they are a fuse. The best I can read the markings say..."250 V" and "SFF13F" or "SFFUS" the markings where mostly removed by the potting compound. I tried reading the mirrored image stuck to the potting. I included the un-mirrored image as well.Dimensions are 11mm long and 5mm diameter. If anyone can identify the brand that would be a huge help.Thanks all!Mike

author: gamalot
author_rank: Super Contributor
timestamp: August 15, 2022, 12:16:38 pm
content: It's FEFUSE (green, 133 degree):https://www.aliexpress.com/item/1005001543119509.html?spm=a2g0o.ppclist.product.2.8d6dWW4SWW4Shj&pdp_npi=2%40dis%21AUD%21AU%20%241.78%21AU%20%241.74%21%21%21%21%21%402101d1b916605656736246128eaff8%2112000016518780117%21btf&_t=pvid:9c72da57-90bf-44d0-ad93-73ab6c4cbacb&afTraceInfo=1005001543119509__pc__pcBridgePPC__xxxxxx__1660565673

author: SeanB
author_rank: Super Contributor
timestamp: August 15, 2022, 12:20:54 pm
content: One time thermal fuse, Littelfuse has those, and the temperature is probably around 155C if the numbers are right.https://www.digikey.com/en/products/filter/thermal-cutoffs-thermal-fuses-and-breakers/146?s=N4IgjCBcpgbFoDGUBmBDANgZwKYBoQB7KAbRAGYwB2MATgAYQBdAgBwBcoQBldgJwCWAOwDmIAL4EATPQAcshCGSR02fEVLh6AAgCCzNp0ggAqkIHsA8igCyONFgCufHBPHigAwill take you to the selection for Digikey USA for them, you will just have to read up the temerature on the line below the 250V marking.

author: manytoolsmike
author_rank: Contributor
timestamp: August 16, 2022, 03:42:24 am
content: Thanks for your help! You guys are awesome. I tried google image search and got nowhere.
Help Identifying this type of Aluminium Extrusion - Page 1
Forum section: electronics / projects

author: TPI
author_rank: Contributor
timestamp: August 21, 2013, 06:42:44 am
content: I salvaged this out of an old battery charger enclosure.It’s an aluminium extrusion which has a king of rebate on each end to accommodate a plate which will form the sides. And because it is in this rebate the front is all flush. It also has a screw hole in the corner to mount another cover.I like this idea as with a length of this stuff you can make enclosures of any dimension.But searching around for it on the internet came up with nothing...I'd like to know whether it is known by any particular name or if anybody knows a manufacturer which makes this stuff.OR if theres anything this works in a similar way to this...

author: G7PSK
author_rank: Super Contributor
timestamp: August 21, 2013, 07:49:09 am
content: Aluminium extrusions are very often proprietary, They can be made quite cheaply by companies like Norsk Hydro so trying to match a small piece up can be next to impossible, some shapes are stock, these are the angles and tee's etc other shapes are available as standard from coach building suppliers but every one of these supply companies have different shapes that are proprietary.You could Google for aluminium extrusion Council and other trade organizations and then try each of their members in turn.

author: kayvee
author_rank: Regular Contributor
timestamp: August 21, 2013, 08:14:11 am
content: Agreed with that, it will be an impossible task to try and locate.Often the aluminium foundries will make proprietary tools for you for free, as long as you commit to taking specific amounts of the product over a period of time. A previous company I was with for had a number these dies in use. Of course they will not run material through your dies for another customer either.

author: free_electron
author_rank: Super Contributor
timestamp: August 21, 2013, 12:36:01 pm
content: Try fischer. They probably make this.

author: AlfBaz
author_rank: Super Contributor
timestamp: August 21, 2013, 11:20:44 pm
content: It may be feasible to make your own. If you can get your hands on some aluminium angle where the inside corner is sharp and not rounded then get one length of 25mm angle and another 12mm.Place the 12mm on the outside of the larger 25mm. Drill clearance holes in the 12mm one and tap some holes in the 25mm. Countersink the clearance holes and use countersunk screwsUse plenty of lube and don't turn the tap to many times when tapping aluminium

author: TPI
author_rank: Contributor
timestamp: August 22, 2013, 07:33:13 am
content: That's not a bad idea, thanks for that!

author: AlfBaz
author_rank: Super Contributor
timestamp: August 22, 2013, 09:16:50 am
content: Quote from: TPI on August 22, 2013, 07:33:13 amNo, Thank YouI now have a cool little construction technique thanks to your find. All I have to do is purchase sheet aluminium the same thickness as the angle, it should look pretty slick
Help identifying this vintage connector - Page 1
Forum section: electronics / projects

author: rea5245
author_rank: Frequent Contributor
timestamp: January 23, 2020, 05:53:49 pm
content: Hi,I'm repairing an IBM 5151 monochrome monitor from the original IBM PC. Someone cut off the power and video cables since, y'know, the copper in them is worth more than a working 5151.So I'm replacing the video cable but I could use help identifying the connector inside the monitor.Here's what it looks like:And when I pop out the wires, here's what the pins look like:What crimp pins should I be ordering?Thank you,Bob

author: rea5245
author_rank: Frequent Contributor
timestamp: January 23, 2020, 05:55:19 pm
content: Oops, the first image didn't get pasted in right:

author: andy3055
author_rank: Super Contributor
timestamp: January 23, 2020, 08:37:16 pm
content: https://www.molex.com/molex/products/family?key=econolatch

author: rea5245
author_rank: Frequent Contributor
timestamp: January 23, 2020, 09:18:18 pm
content: I suspected it was a Molex connector. But there seem to be many choices of pins and my concern is how to find the matching one.- Bob
Help identifying transistor - Page 1
Forum section: electronics / projects

author: Brentd27
author_rank: Newbie
timestamp: February 01, 2022, 08:31:29 pm
content: I have a box of TO-92 style transistors that are unlabeled. I believe they might be from a package of Radio Shack "NPN Switching Transistors", but I'm not sure. The markings are 9287 on the top row, ND118 second row and E B C on the last row above the pins to indicate Emitter, Base, Collector. I've googled 9287 and ND118 and have not found anything useful. Can some one help me identify these transistors?Pic attached for reference.

author: bob91343
author_rank: Super Contributor
timestamp: February 01, 2022, 08:56:51 pm
content: 9287 would be a date code but there are no such date codes. ND118 seems the best bet.Having said that, just measuring beta should be enough information. If Vbe is around 0.7V it's not a darlington. You can current limit it to a source of voltage to see where it begins to break down. The only other major parameter would be speed, which takes a bit more effort. However, if beta isn't all that high, I'd assume it's a pretty fast unit.I also have a bunch of TO-92 units that are unmarked and I use them for general purpose and they do fine.

author: BrokenYugo
author_rank: Super Contributor
timestamp: February 02, 2022, 12:29:37 am
content: My google fu also comes back with nothing conclusive. I'm inclined to agree with Bob, do some basic characterization and treat them as generic small signal transistors.

author: bob91343
author_rank: Super Contributor
timestamp: February 02, 2022, 06:12:14 am
content: A useful tool for this is what I call the Magic Chinese Box. It's an inexpensive device for determining what an unknown part is and its characteristics. Most of us have one I think.

author: magic
author_rank: Super Contributor
timestamp: February 02, 2022, 08:25:18 am
content: It's a Magic German Box, actually, made in Chinahttps://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/
help identifying TVS diode & ratings - Page 1
Forum section: electronics / projects

author: bigjoncoop
author_rank: Regular Contributor
timestamp: September 04, 2021, 12:37:29 am
content: hey fella's,I've got 2 different TVS diodes I'm trying to determine the specs of. they come on 2 different FPV quadcopter spike/transient voltage suppressor/absorbers pcbs.I'm not completely sure of which values/characteristics of a TVS diode that I should be looking for or are the most important. So I found these 2 existing products but I cant seem to find the exact TVS diodes being used to research there ratings.both products are using a specific brand of diode that I cant seem to find out which brand it is.... Ill post a image of each below.Again im not wanting to necessarily use the same exact diodes but am really just trying to figure out the ratings so I can find some similar.So if anyone can point me to a datasheet of either one of these diodes or REALLY just let me know of what specific ratings of a TVS diode I should be looking for....these diodes in this particular situation are to absorb voltage spikes and being used with large low ESR capacitors to filter "noise" going to the rest of the quadcopters electronics. we normally use from a 3s lipo battery up to 6s and sometimes 8s.

author: thm_w
author_rank: Super Contributor
timestamp: September 04, 2021, 01:11:41 am
content: Google "GEZ TVS" gives a result which says SMCJ24A, which looks right.So check the package size, compare it to SMC, make sure thats the same (5.8x6.9mm).Then look at the datasheet for SMCJ24A.Relevant to you would be breakdown voltage.

author: bigjoncoop
author_rank: Regular Contributor
timestamp: September 04, 2021, 02:26:30 am
content: i see the SMCJ24A your talking about.seems like its made by LITTLEFUSE.but if I google "108 GEZ" or 833 "GEZ" the datasheets are different... and I cant seem to find what brand / manufacture uses the symbol ɔ¦¦ which is on both of the TVS diode in the pictures I provided...BUT ANYWAY, you mentioned that the most relevant TVS diode value / characteristics is the Break Down Voltage. So your saying I need a TVS diode with a breakdown voltage which is higher then my max battery voltage correct?and for the maximum protection for my circuit, which of the other value / characteristics should I be concerned with?thx for your help. ive just never had to use a TVS Diode before in any of my circuits so im just trying to clarify what i should be looking for

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 04, 2021, 08:05:15 pm
content: That's the Diodes, Inc. logo. See it in the datasheet.The number is the date code.TVSs are all largely specified the same way, any of comparable ratings will do as a replacement. Do check that the nominal and breakdown voltages match up: some families are typed by breakdown voltage (like zener diodes), some by nominal voltage (breakdown is some margin higher than nominal).Tim
Help identifying two parts - Page 1
Forum section: electronics / projects

author: Harjit
author_rank: Regular Contributor
timestamp: January 15, 2025, 06:59:00 am
content: There are a couple of parts on my go kart data logger that I'd be very grateful for help identifying.Part 1:Part 2:

author: sd
author_rank: Unknown
timestamp: January 15, 2025, 02:23:46 pm
content: First one might be a MPS MPM3510

author: Harjit
author_rank: Regular Contributor
timestamp: January 17, 2025, 07:10:35 pm
content: Thank you. It does look like Monolithic's part number scheme, and footprint for a part with a built in inductor!On the second/third image, I measured R44 and R45 and they are 10k. R46, and R47 are 100k. I hope to connect a scope to them and see what is going on.

author: Harjit
author_rank: Regular Contributor
timestamp: January 18, 2025, 09:22:31 pm
content: I'm reasonably sure the second part is a gyro/imu/magnetometer but I haven't been able to find the manufacturer.
Help Identifying Unknown TFT Display - Page 1
Forum section: electronics / projects

author: pala
author_rank: Newbie
timestamp: January 08, 2025, 04:21:20 pm
content: Hello everyone,I’m working with a TFT display that came with a board labeled Anycubic TFT V0.0.2, which includes an STM32F103 microcontroller and a TC58BVG1S3HTA00 flash memory chip. The display has 45 pins in total and does not seem to have a controller chip (there's no visible IC for controlling the display), which leads me to believe it may be a simple raw panel that I need to drive directly.Here’s a breakdown of the pinout I’ve observed:6 backlight LED pins (5 GND, 1 VCC for backlight).4 touch interface pins (SCL, SDA, INT, RST or X+/X-/Y+/Y-).16 data pins, with 8 of them routed through the flash chip.3 GND pins.7 unconnected pins.I’m struggling to identify what kind of display this is and how to initialize it properly.Has anyone encountered a similar display, or can anyone help identify what kind of display this might be based on these details? Also, any guidance on initialization or interfacing with a display of this type would be greatly appreciated!Thanks for any help or insights!

author: amyk
author_rank: Super Contributor
timestamp: January 08, 2025, 10:13:40 pm
content: The board appears to have come from a 3D printer, but any markings on the display itself?
Help identifying wire-to-board connector - Page 1
Forum section: electronics / projects

author: smiddereens
author_rank: Newbie
timestamp: February 18, 2016, 03:47:17 am
content: Hi,I need help identifying an internal USB 3.0 connector. I realize that I didn't include a scale reference, but the PCB that the connector is attached to is 12.5 mm (about 0.5 in) tall. I've included photos of the mated pair, the receptacle and the wire connector:http://imgur.com/a/z0XFSThanks!

author: jambrose
author_rank: Unknown
timestamp: February 19, 2016, 12:40:04 am
content: Hi smiddereens,I don't know a huge amount about connectors and identifying them but I don't recognize it off the bat. More information would probably help. What's is the board in questions from? Are you looking to replace the cable, the socket, or both?-Josh

author: timgiles
author_rank: Regular Contributor
timestamp: February 20, 2016, 01:44:39 pm
content: Hmmm - could be a JST (Japan Solderless). Check outhttp://www.jst-mfg.com/product/search_e.php?type=1&id=1this link for a list of their connectors. It might be easier with you having the cable to hand to match it up, if it is a JST.Good luck
Help IDing a connector - Page 1
Forum section: electronics / projects

author: moore
author_rank: Contributor
timestamp: September 30, 2020, 07:51:55 pm
content: Does anyone know what the pictured connector is? Ruler is in cm; it's on a PCIe digitizer. It looks like the old Japanese video type connector but wider. I was trying to dig through Mouser etc but it's kind of hard to narrow things down when I don't even know what family a connector is in. Appreciate any pointers.

author: drvtech
author_rank: Regular Contributor
timestamp: October 01, 2020, 10:54:31 am
content: Has the look of a Hirose connector but I can't tell what pitch yours is. You could start by specifying the number of contacts and the pitch and then putting them into the parametric search for I/O connectors on Mouser

author: coromonadalix
author_rank: Super Contributor
timestamp: October 01, 2020, 05:36:15 pm
content: what is the instrument model brand ??seems a 34 pins connectormaybe one in this pagehttps://www.globalsources.com/manufacturers/100-Pin-SCSI-Connector.html

author: moore
author_rank: Contributor
timestamp: October 02, 2020, 01:45:09 am
content: Honestly it's hard to count, I tried but with my eyes will need a proper magnifier. It is in the ballpark of 34.Those Centronics certainly look close. I'd forgotten SCSI existed, ha! Will check those out. Also will try Hirose on Mouser. Thanks to you both, I'll report back with how it went.
help IDing chip - collmer RDF005 or 2SF005 - as pictured - Page 1
Forum section: electronics / projects

author: ev1
author_rank: Newbie
timestamp: October 28, 2024, 12:11:19 am
content: hi, new here. need help to ID this damaged/overheated chip. i believe the mfg symbol "C" is for collmer semiconductor from my current research. cannot find the chip listed anywhere, not sure of the PNs due to chip condition. looks like RDF005 or 2SF005 or some combination thereof. I believe the pcb was made c1995. can anyone ID this chip, PN, and what it does, and/or replacement options? Note the + and (-) imprints on top of chip, 4 pcb connections. this one is cracked and overheated. any assistance would be much appreciated. pictures attached. thank you. ev1

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 28, 2024, 01:34:51 am
content: The datasheet is the first thing that comes up in a google search.second one is almost gone the marking, but I think it is the same RDF005.

author: ev1
author_rank: Newbie
timestamp: October 28, 2024, 02:04:28 am
content: oh my. thank you. i searched and could not pickup a thing, you have the magic touch. Thank you again for the assistance, much appreciated. now i am off to find an available one. ev1

author: DaJMasta
author_rank: Super Contributor
timestamp: October 28, 2024, 02:18:42 am
content: That could be the part, those markings are basically always a bridge rectifer of some sort.

author: floobydust
author_rank: Super Contributor
timestamp: October 28, 2024, 02:18:51 am
content: It's a bridge rectifier and commonly a "DFM" package so DF005 or DF01 or DF02 etc. is easy to find. Just confirm what voltage it usually sees.https://www.vishay.com/docs/88571/dfm.pdfIf it's getting hot, best to find the overload and fix that. They don't take much abuse.

author: ev1
author_rank: Newbie
timestamp: October 29, 2024, 12:25:58 am
content: thank you. agreed. i have to find the overload. unfortunately that diagnosis is a above my abilities. great at physical issues, making and repairing pcbs and such, but the actual engineering is beyond me. but thank you again, one step closer we are (yoda). ev1
Help IDing mystery parts - Page 1
Forum section: electronics / projects

author: dcarr
author_rank: Regular Contributor
timestamp: May 23, 2016, 01:17:41 am
content: This is the inside of some avionics, specifically an ARINC 429<--->CAN BUS module. I've been digging, but I can't seem to ID the 14 pin TI part and the smaller ST part. My guess is that the TI is a bus driver, but I'm less certain about the ST part (perhaps something digital like shift register, UART, etc?)I read something like TO84 35K Q4 A0GY and K550 Y350.Any ideas?David

author: tautech
author_rank: Super Contributor
timestamp: May 23, 2016, 01:46:02 am
content: 3 phrases to include for better results for Google searches:SMD marking xxxxPackage:SOT-23/x, SOICxx, TSSOPxx, etcIC DataThese are needed in order to make much sense of results. I usually use them in that order and not worry about brand unless further refining of results are necessary.Others will have their preferred methods but those work for me.

author: dcarr
author_rank: Regular Contributor
timestamp: May 23, 2016, 01:55:30 am
content: Thanks --- very helpful. Also found this:http://www.ti.com/packaging/docs/partlookup.tsp#divlineThe TI parts are TL084 opamps, interesting. Still working on the ST part.

author: dcarr
author_rank: Regular Contributor
timestamp: May 23, 2016, 02:13:00 am
content: ...and the ST is a LM239 quad comparator.

author: tautech
author_rank: Super Contributor
timestamp: May 23, 2016, 02:19:43 am
content: Easy eh. That didn't take you long and you'll never forget how to do it how.Sometimes I addpdforfreeordownloaddepending on what I'm looking for.
Help IDing this QFP? - Page 1
Forum section: electronics / projects

author: iXod
author_rank: Frequent Contributor
timestamp: January 27, 2018, 01:05:44 am
content: Looking for datasheet for this QFP:https://imgur.com/a/iT800Mr. Google isn't much help with any of those numbers, at least that I can find.Anyone?Thanks.

author: fourtytwo42
author_rank: Super Contributor
timestamp: January 27, 2018, 03:04:21 am
content: Some context might be helpful, like what product and what do you think it does ?
Help - I'm stuck - Page 1
Forum section: electronics / projects

author: cmumford
author_rank: Contributor
timestamp: March 21, 2021, 04:38:49 pm
content: I've beenstucktrying to figure out a problem for days, and I'm hoping somebody here can help me out.I'm building a mechanical keyboard project which uses the TILM8330keyboard IC. The LM8330 has an I2C interface, and for the life of me I cannot get it to respond in any way on the I2C bus. It is a 1.8V chip, so I'm using theLSF0204DPWRlevel shifter.Here is what I've done, so far, to troubleshoot:Examined the SDA/SCL signals (both 3.3 and 1.8V) leading to the LM8330. They appear to be correct - my scope can decode the data, but the LM8330 behaves as though it is disabled.Tried a second LM8330 - soldered by somebody else. I'm using aBGA adapterand had that company solder the IC for me. Still the same behavior.Tried 106Ω and 330Ω pull-up resistors for the 1.8V lines as per the LSF0204DPWR spec (datasheet: 10.2.1.2.1.1). I think ideally I would be using 223Ω resistors for 6.5 mA pin current, but the area is hard to access now. This is the only thing I could try, but haven't.Tried both 100kHz and 400kHz I2C bus speedsHere is my projectschematic,layout, andsource code.So, I'm out of ideas, and am hoping that one of you can see what I might be doing wrong.P.S. The datasheet does have me a bit confused as it lists the 7-bit I2C address as 0x88 - which is > 127. Usually when a company does this they provide two addresses (one for reading and another for writing), but TI doesn't do this. Either way, I tried using both 10-bit and 7-bit access modes, as well as tryingall possible addresses: 0..127.

author: phil from seattle
author_rank: Super Contributor
timestamp: March 21, 2021, 05:15:33 pm
content: Your 3.3V I2C pullups might be too high. I use 2.2K for 400 kHz I2C.

author: cmumford
author_rank: Contributor
timestamp: March 21, 2021, 06:40:41 pm
content: Hi Phil:Thanks for pointing that out. With my current 5KΩ pull-up resistors on the 3.3V side I measure 485 ns rise and 175 ns fall times. This is too slow for fast mode (spec says 300ns), but well in specification (relavent section of I2C spec.) for Standard-mode at 100 kHz.Do you think these resistor values might still pose a problem for communicating at 100kHZ?

author: mjkuwp
author_rank: Unknown
timestamp: March 22, 2021, 12:50:23 pm
content: is the 7-bit address really 0x44.https://www.ti.com/lit/ds/symlink/lm8330.pdfPage 27then you add to that either 0 or 1 at the least significant bit for writing or reading0x88 and 0x89. 0x88 for writing and 0x89 for reading.i2c addressing can be confusing because the abstraction of the LSB depends on the library you are using.disclaimer - I am no expert but I have used i2c and I have been in this same boat : )

author: DL2XY
author_rank: Regular Contributor
timestamp: March 22, 2021, 03:05:35 pm
content: The level shifter is reversed.The B side mustbe the higher voltage. (VrefB >= VrefA+0.8V)
Help in assessing the Input mains circuit integrity - Page 1
Forum section: electronics / projects

author: Sultanpepper123
author_rank: Regular Contributor
timestamp: March 30, 2021, 06:48:12 pm
content: Hello everyone ,I've been working on designing a (220V-380VAC) 3/4Wire phase energy meter and in terms of metrology operation , things were working very well quite similar in terms of metrology if compared to a commercial unit. Now I'm no expert in mains power electronics circuit design so I opted to integrate an off the shelf AC/DC fly-back power supply, which when integrated in the meter worked well in lab conditions. I've followed and implemented the mains Input protection circuit going into PSU which is specified by the PSU manufacturer but to be honest I feel helpless as I have no idea how to calculate/know how and why the values are specified in this stage , I need to be able to know how much energy/ voltage and the where bouts of the circuit operates in a surge , fast transient and ESD situation since I plan on doing a pre-compliance test and one of the tests I'm concerned with is if the input protection fails then I have not backup plan so I would really appreciate if someone would kindly share his insights and knowledge on how to pre-simulate or calculate the values of the input circuit below in order to pass the following test conditions below as well.Figure (1): Schematic of the Mains Input circuitry with the Power SupplyTest 1Test 2Test 3Some information on the MOV used on each Line (230VAC)Final Note : I come from an Electronics and Communications background and i have done a reasonable amount of work in Low voltage ( Analog , Digital and RF ) board designs but I'm no expert in this subject but I'm willing to learn. I know how to simulate how an AC signal going in to a bridge rectifier and analyze the output , you know basic stuff that most of us learned during undergrad , but the ( fast transients ,...etc) on an AC mains situation, I've never worked with such case. I'm having a hard time on how to figure out how to model and simulate the MOV in the simulation programs ( LTSpice , Proteus ISIS & TI TINA ).My Questions :1. How do you calculate the correct MOV model/value for the above application to pass the test conditions mentioned above ?2. Will the current Input stage of the Power Supply survive the Tests mentioned above ? ​BR
Help in identifing this diode. - Page 1
Forum section: electronics / projects

author: prodarkness
author_rank: Contributor
timestamp: May 13, 2017, 04:51:23 am
content: recently repairing a circuit board came a cross a diode cant seems to find what is the actual name.It Label 2K 47 .

author: john_c
author_rank: Contributor
timestamp: May 13, 2017, 05:06:46 am
content: The photo shows K2, not 2K?

author: prodarkness
author_rank: Contributor
timestamp: May 13, 2017, 06:20:31 am
content: opps my bad its K2 47

author: john_c
author_rank: Contributor
timestamp: May 13, 2017, 06:48:13 am
content: I couldn't find anything. :/

author: MagicSmoker
author_rank: Super Contributor
timestamp: May 13, 2017, 09:25:48 am
content: It looks like it could be a 6A diode. What are the dimensions of the body?

author: Paul Price
author_rank: Super Contributor
timestamp: May 13, 2017, 04:47:53 pm
content: Reverse engineer it.First apply a small current approx 2-10mA (DVM ohms-diode setting will supply) and measure the forward voltage. If its <.6 V its a schottky, >.65V its probably a rectifier diode like 1N400x family.Look at the voltages of capacitors it connects to or whether it connects to a inductor(schottky) and the cap max voltage tells you ballpark of its reverse voltage rating. If it connects to a flyback transformer primary, its probably a fast silicon rectifier. If it connects to the mains it is a HV slow silicon rectifier.Look at it's size. If it's >.25 diam then it is rated at >3A <6amp.Measure its reverse leakage with DVM, if if <100k it is likely a schottky.Apply a high voltage though a large valued resistor 10k- and measure the reverse voltage. If it clamps the voltage, it could be a zener.If you have an oscilloscope and a mains transformer for a power supply apply the secondary AC voltage to it through a 10K resistor and observe the trace across the diode, it will show you if it is a silicon rectifier or a zener or a schottky.

author: technix
author_rank: Super Contributor
timestamp: May 14, 2017, 01:00:52 pm
content: Can you show us the other side of the diode?

author: prodarkness
author_rank: Contributor
timestamp: May 15, 2017, 01:36:24 am
content: the dimension is roughly 3mm in length and 2.5mm in height