hybridfree/eevblog-posts huggingface dataset:
Help identify this Component - Page 1
Forum section: electronics / beginners

author: Alfgan
author_rank: Contributor
timestamp: March 20, 2020, 09:02:35 pm
content: Hello, I watched a video about multimeter and saw a strange component. Large black square. It seems it is a Resistor bet what is its purpose and why it should be this big? Hope someone can explainThanks

author: ArthurDent
author_rank: Super Contributor
timestamp: March 20, 2020, 10:08:01 pm
content: The rectangular black component in the lower photo appears to be a high voltage resistor. You can see that the lower end has cuts in the circuit board to prevent arc over. Here's another example of cuts on a circuit board near a line connector.https://cdn.mos.cms.futurecdn.net/7GQLgMXSFiNG4EizUpSXan-1200-80.jpg

author: helius
author_rank: Super Contributor
timestamp: March 20, 2020, 10:14:04 pm
content: This type of precision resistor is made using hybrid technology printed on a ceramic board. The leading manufacturer of these things is Caddock.
Help identify this component? - Page 1
Forum section: electronics / beginners

author: BladeDreams
author_rank: Newbie
timestamp: January 13, 2014, 12:41:55 am
content: Hello!New here....that said....Can anyone help Identify this component?It's out of a Philips FR968/17 home theater system, this is on the main board - part number 3927.I thought it was a resistor, but i am unable to find any similar to this one.(yes there are 2 that are "smoked" - I will be replacing all 4...I hope!)As this is a very basic, very simple through hole design one sided - figured it would be simple to fix...Well, the replacement is very easy - I just need a part - LOL. Or a compatible replacement.Thanks in advance!

author: xrunner
author_rank: Super Contributor
timestamp: January 13, 2014, 12:48:20 am
content: Quote from: BladeDreams on January 13, 2014, 12:41:55 amWhat makes you think it isn't a resistor? Did you measure the other ones that aren't burned with an ohmmeter?Edit: Looks like a 4 band color code -22 * 0.01 = 0.22 ohms(5% tolerance)

author: BladeDreams
author_rank: Newbie
timestamp: January 13, 2014, 12:54:53 am
content: only reason i im not sure is I cannot find any matching this.looks to be .77ohms.Bands are violet, violet, silver, gold.testing those next to it now...

author: c4757p
author_rank: Super Contributor
timestamp: January 13, 2014, 12:55:47 am
content: I see red, red, silver, gold. 0R22 5%, looks like 1W, possibly fusible.

author: xrunner
author_rank: Super Contributor
timestamp: January 13, 2014, 12:56:17 am
content: Quote from: BladeDreams on January 13, 2014, 12:54:53 amYea OK the colors didn't come out here very well.

author: rdl
author_rank: Super Contributor
timestamp: January 13, 2014, 12:58:36 am
content: There are pink resistors, but those color code bands are weird. The fact that there are four of them and mounted way above the board surface makes me want to guess that they could be diodes being used as a rectifier.

author: c4757p
author_rank: Super Contributor
timestamp: January 13, 2014, 01:00:03 am
content: Quote from: rdl on January 13, 2014, 12:58:36 amNope.Resistors.0R22.Haven't you guys ever seen a hard-to-read resistor before? Must be just me who gets the crappy ones all the time...

author: BladeDreams
author_rank: Newbie
timestamp: January 13, 2014, 01:01:14 am
content: So, you see my issue.I looked up .22 ohm ones - none look like these - but I can find the values.looked up .77 - Nothing.As to being something else - LOL thats what Im asking.

author: BladeDreams
author_rank: Newbie
timestamp: January 13, 2014, 01:03:50 am
content: You may be right - found this -http://www.ebay.co.uk/itm/5x-0-22-ohm-0R22-0-22R-1W-1-Watt-Metal-Film-Resistor-/200641154286I will have to go more on the 0R22 hunt....Thank you !

author: xrunner
author_rank: Super Contributor
timestamp: January 13, 2014, 01:06:34 am
content: Quote from: BladeDreams on January 13, 2014, 01:03:50 amWell there you go.
Help identify this connector system please - Page 1
Forum section: electronics / beginners

author: Infraviolet
author_rank: Super Contributor
timestamp: December 14, 2022, 10:47:24 pm
content: 6 pinsPitch of 2mmConnector is directional and will not go in reversedIt is came supplied with a cheap no-brand DC motor (currents <1A) with magnetic backshaft encoder, so I guess it is a generic connector typeThere are two ridges on one side of the connectorIt clearly has crimped parts within for the wires in the cable side of the connector systemBoth the cable and a header for it are shownAny idea what series it might be?Thank you

author: gamalot
author_rank: Super Contributor
timestamp: December 14, 2022, 11:12:53 pm
content: They look normal, like common JST PH series or compatiblehttps://www.jst-mfg.com/product/pdf/eng/ePH.pdfhttps://www.digikey.com.au/en/products/detail/trinamic-motion-control-gmbh/CABLE-PH06/9381902

author: Infraviolet
author_rank: Super Contributor
timestamp: December 14, 2022, 11:28:56 pm
content: Thank you, definitely looks like it could be.
Help identify this IC - Page 1
Forum section: electronics / beginners

author: Bicurico
author_rank: Super Contributor
timestamp: April 11, 2019, 10:50:14 pm
content: Hi,Can someone help me out and tell me what these orange/yellow IC's are?How can I test if they are OK?The picture is of one of my HP 8594E. This device stopped working suddenly (was turned on). No smoke or explotion. The motherboard shows now sign of any broken component. If I turn the device on, the CRT goes on but shows no picture and the device seems dead - no clicking of the relais, just the CRT, power LED and fans.This picture shows where the PSU attaches (connector on the other side of the board, you can see the J1 pins). I imagine that the fault could be these yellow IC's - are the some kind of fuse?Thanks,Vitor

author: Lee Leduc
author_rank: Regular Contributor
timestamp: April 11, 2019, 10:59:16 pm
content: Looks like a resistor network. Most likely used as termination for the ribbon cable.https://www.lintechcomponents.com/product/014135829/18100301/1LQK8

author: ArthurDent
author_rank: Super Contributor
timestamp: April 11, 2019, 11:18:52 pm
content: Lee Leduc is correct. The maker's symbol indicates it was made by Bourns in 1994.

author: Bicurico
author_rank: Super Contributor
timestamp: April 11, 2019, 11:38:53 pm
content: Thanks!How could I measure them to see if they are the reason the device doesn't power up?I can't find any datasheet...Regards,Vitor

author: helius
author_rank: Super Contributor
timestamp: April 11, 2019, 11:59:46 pm
content: Those resistor networks are terminating a data bus from the mainframe's motherboard (note the silkscreen for the connector says "MTHRBD"). They have been labeled with internal HP part numbers. The component list states:Code:U401 1810-0301 1 NET-RES 8 51.0 OHM 16-DIPWhich means, a resistor network of 8 resistors, each 51 ohms, in a DIP-16 package.The Bourns part number is 4116R-1-510.Datasheet.

author: ArthurDent
author_rank: Super Contributor
timestamp: April 12, 2019, 12:32:30 am
content: I doubt very much that the resistor networks are your problem. The 51.0 ohms value helius found for the part is also coded on the top of the network (510). If there are 8 resistors and the network has 16 pins, they probably are wired 1-16, 2-15, etc and if you unplug the cable you can verify this with an ohmmeter.

author: Bicurico
author_rank: Super Contributor
timestamp: April 12, 2019, 07:13:33 am
content: Thank you guys!That was a great help. I will measure the pins ASAP and check those IC's out.I doubt anything much dramatic happend, otherwise there would be some burned/exploded component.On the other hand, not having any sign on the motherboard makes it difficult to "see" what could have happend, so I will work my way from power inlet.Regards,Vitor
Help identify this PCB pin connector type's name - Page 1
Forum section: electronics / beginners

author: CkRtech
author_rank: Regular Contributor
timestamp: May 09, 2016, 07:01:34 am
content: Hello everyone - I would like to find out what this white connector is called is so I can order the female plug with some wires as a bit of a breakout for signal mixing and scoping. If anyone could provide the industry standard name (if there is one), that would be sweet. Thanks in advance!

author: Richard Crowley
author_rank: Super Contributor
timestamp: May 09, 2016, 07:11:25 am
content: I believe those are two different sizes of JST connectors...

author: poorchava
author_rank: Super Contributor
timestamp: May 09, 2016, 07:29:09 am
content: In cases like this, just measure pin pitch and the look through JST, Molex and Hirose, in 90% of cases you'll find a match.Sent from my HTC One M8s using Tapatalk.
Help identify this transistor - Page 1
Forum section: electronics / beginners

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 22, 2015, 02:39:54 am
content: Bought a bag of transistors off Amazon to play with but there was no datasheet or anything. Only thing it says on it is TU 13001. I can't for the life of me figure out what is base emitter and collector and searching that number brings up lot of irrelevant results and even contradicting datasheets. I may have possibly blew a couple trying to figure it out.Any help would be appreciated. I got it working by fluke once and I should have wrote down the results.

author: wraper
author_rank: Unknown
timestamp: March 22, 2015, 02:44:35 am
content: Likely some knockoff of MJE13001.

author: VK5RC
author_rank: Unknown
timestamp: March 22, 2015, 03:02:13 am
content: Is this helpful?

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 22, 2015, 03:08:04 am
content: My multi meter does not have diode mode.. though guess I could probably do the same using a LED and 5 volts? Is that basically what the multimeter is doing? I have to look at getting a better multimeter though, but been spending lot of money latetly on this new hobby.So I found a MJE13001 datasheet says 1: emiter, 2: colector, 3: base does that sound right?So emitter goes to ground, collector goes to load, which is connected to positive of a higher voltage/amperage (if desired) source, and base is put to ~5v to turn on and off, correct?

author: Red Squirrel
author_rank: Super Contributor
timestamp: March 22, 2015, 03:47:10 am
content: Ok I got it! It was indeed E C B (with flat part facing me). The load (small DC motor on 12v) I was testing with was just too much for the little transistor to handle so I thought it was not working.

author: VK5RC
author_rank: Unknown
timestamp: March 22, 2015, 06:14:41 am
content: Well done,if you solve it yourself you learn so much more. I have learnt more from my mistakes than my successes!

author: dannyf
author_rank: Super Contributor
timestamp: March 22, 2015, 10:45:06 am
content: QuoteMJE13001 - high voltage switching type.

author: amyk
author_rank: Super Contributor
timestamp: March 22, 2015, 01:39:37 pm
content: Some 13001 are BCE pinout and others are ECB, beware.Quote from: Red Squirrel on March 22, 2015, 03:08:04 amMostly; in the common-emitter configuration, you will need to limit the current into the base with e.g. a resistor, otherwise remember that the B-E junction acts like a diode (exponential I-V curve) and with a high-enough voltage, will pass as much current as it can until it burns itself out. In a switching application you only need enough base current to saturate the transistor.I suggest you read a bit more on BJT fundamentals.

author: iamdarkyoshi
author_rank: Frequent Contributor
timestamp: March 22, 2015, 04:50:12 pm
content: Cheap but fantastic tool:http://www.ebay.com/itm/Small-12864-LCD-Transistor-Tester-Capacitance-ESR-Meter-Diode-Triode-MOS-LCR-NPN-/251518131978?_trksid=p2054897.l4275Not super acurate, but well worth the price.
Help identifying 6-pin SMD IC labeled "AVW" - Page 1
Forum section: electronics / beginners

author: RedX159
author_rank: Newbie
timestamp: June 25, 2025, 10:26:18 am
content: Hi everyone,I’m trying to identify a small 6-pin SMD IC with the marking “AVW” printed on it. There are no other markings on the chip (you can see the picture below).I've searched the SMD code, but couldn’t find a matching part number.- Marking: AVW- Pins: 6Thanks in advance.

author: thm_w
author_rank: Super Contributor
timestamp: June 25, 2025, 11:06:36 pm
content: https://www.ti.com/lit/ds/symlink/tps3808.pdfhttps://www.ebay.com/itm/334874509826

author: fzabkar
author_rank: Super Contributor
timestamp: June 25, 2025, 11:45:35 pm
content: https://www.google.com/search?imgtype=photo&q=avw+sot23-6&tbs=isch:1,isz:m&udm=2http://markingcodes.com/search/c/avw

author: RedX159
author_rank: Newbie
timestamp: June 26, 2025, 07:21:13 am
content: Thank you all for your help! I really appreciate it.
Help identifying a barrier sensor (or a suitable replacement) - Page 1
Forum section: electronics / beginners

author: ogl
author_rank: Newbie
timestamp: November 09, 2023, 02:53:41 pm
content: Hello!So I have a barrier sensor that I have extracted from a cycling trainer - particularly the Elite Direto - which I intend to use in a project. However, my Direto has two of these sensors and I need a couple more, so I would like to know where I can buy some more. The thing is, I have not been able to locate any reference number on the part in order to Google it, so I'd greatly appreciate any suggestions.Before you tell me to just go buy any barrier sensor, I will say that I am interested in the barrier sensor from a cycling trainer because I am looking for a sensor capable of moving signals of up to 5-10 MHz, and I know that because of how this trainer measures power, it must have very accurate measurements by the barrier sensors (For the curious out there, if you want to see how it works, check this out:https://www.elite-it.com/en/innovations/optical-torque-sensor-power-meter-integrated.Pretty cool!!)Attached to the post are three pictures of said sensor, two of the upper side and one of the lower side, in which you can see some numbers but they seem to be for internal reference within Elite, as googling them does not give any useful information.I could also do with the product name/reference of a barrier sensor that moves signals of 5-10 MHz, it doesn't necessarily have to be this one.Thank you all for your help!!

author: SuzyC
author_rank: Frequent Contributor
timestamp: November 09, 2023, 03:06:23 pm
content: This so-called "Barrier Sensor" looks just like an ordinary infrared diode --infrared transistor detector. It easily detects any type of infrared opaque material(i.e. a piece of metal, paper, plastic, etc.) that is placed in the slot between the IR transmitter and detector square modules.You can salvage them for free from any old PC printer or buy them for a few cents on ebay.

author: TimFox
author_rank: Super Contributor
timestamp: November 09, 2023, 04:41:16 pm
content: That link didn't work.However, the photosensor in an "optical interrupter" (aka photo interrupter) is not usually rated for 5 MHz operation.This Omron parthttps://www.mouser.com/datasheet/2/307/Omron_EE_SX1330_2_Datasheet_English-3315007.pdfis considered to be "high speed", but the rise and fall times of the electrical output are roughly 10 us each at 100 ohms load, increasing with higher load resistance.Also note the datasheet graph for the (slow speed) output as a function of blocker position (figs. 8 and 9).
Help identifying a capacitor - Page 1
Forum section: electronics / beginners

author: Gosub
author_rank: Contributor
timestamp: October 27, 2014, 09:19:51 pm
content: Hi there and yes, you guessed it, another stupid question from me. I'm still struggling to identify some components and todays little puzzle is belowI measured the part at 151 nF on two dmm's, this will probably be off spec as the cassette deck is from 1980 and I need to fix it for my ZX Spectrum project.If anybody could find the time to educate me on component identification I would be extremely gratefulThanks in advance for any help guys

author: PA0PBZ
author_rank: Super Contributor
timestamp: October 27, 2014, 09:36:44 pm
content: If you want to take the average of a number of guesses here's mine: .1 uF / 100nF, 25 Volts.Although the package doesn't look like 100nF at all the .1 seems to suggest it.Just wait for a few more and take the average, that should be close enough

author: Fraser
author_rank: Super Contributor
timestamp: October 27, 2014, 09:38:14 pm
content: Its markings indicate a capacitor of value 0.1uF and a voltage rating of 25VI would suggest that it is a non-polarised electrolytic type.Where in the cassette unit does it reside ?Aurora

author: Gosub
author_rank: Contributor
timestamp: October 27, 2014, 09:41:02 pm
content: So you are both right, It makes sense.I don't think the capacitor in the picture is the problem but because two others had leaked I am replacing the whole lotThanks again guys for helping with this

author: Fraser
author_rank: Super Contributor
timestamp: October 27, 2014, 09:48:44 pm
content: Electrolytic's tend to leak over time as the seal fails.Look to make sure that it does not have a polarity marking against on of the pins. A stripe indicates negative. No markings suggests a non-polarised type.Old electrolytics are a liability so if some are leaking I would suggest you change out all that are of the same make, even better replace all electrolytic capacitors if you want to be thorough.Aurora
Help identifying a component  - Page 1
Forum section: electronics / beginners

author: senso
author_rank: Frequent Contributor
timestamp: August 25, 2014, 11:18:38 pm
content: Good night, I have been (trying to) repairing a PVL ignition cdi unit with a friend, and there are two strange SMD components that I have never seen, its the two black mini-melf with two stripes each that I don't know what it is.For now the cdi is working as expected, but I'm curious to what those two devices might be, the only thing that we measured was the cold and hot resistance of them, its about 0.5M ohms at room temperature(around 25ºC), and at around 80ºC they measure 50kOhms for the smaller one and 80kOhms for the bigger one, and that rises very, very fast as they cool down.Sorry for the blurry photos, taken in a hurry because we where eager to try it out

author: algorithm
author_rank: Regular Contributor
timestamp: August 25, 2014, 11:22:40 pm
content: My guess is a carbon resistor? Hope that helps.

author: senso
author_rank: Frequent Contributor
timestamp: August 25, 2014, 11:34:18 pm
content: But having only two colour bands seems very odd, never saw anything like that.Also forgot to tell, with the continuity they dont beep in any direction, but that might be a by-product of such high resistance.

author: Unknown
author_rank: Unknown
timestamp: August 26, 2014, 12:28:48 am
content: Two band MELF would usually be a diode. There is a sort of standard colour code, but there's also a lot of manufacturer-specific ones.Probably a zener or transorb if they're high resistance bothways and showing that sort of tempco, but the color bands don't match any zeners I'm familiar with.

author: senso
author_rank: Frequent Contributor
timestamp: August 26, 2014, 12:32:14 am
content: I suspect they are something along those lines, the big one is between the storage cap(charged up to 400v) and ground and the other is between the SCR gate and ground, I suspected zeners or varistors to protect the SCR a bit.
Help identifying a component - Page 1
Forum section: electronics / beginners

author: NZST205
author_rank: Contributor
timestamp: October 19, 2014, 06:19:11 am
content: I have some small green components which look like little resistors, the only markings on them are 1/16 ALF, I've attached a photo, I can't find what they might be by searching for a data sheet. I thought they might be some sort of inductor, but can't find any inductor datasheet with anything looking like this. Help appreciated

author: SeanB
author_rank: Super Contributor
timestamp: October 19, 2014, 06:30:38 am
content: Solder in fuses, 1/16A rating, or 60mA. They typically are rated for 125VAC use.

author: NZST205
author_rank: Contributor
timestamp: October 19, 2014, 06:39:08 am
content: Awesome thanks SeanB
Help identifying a component - Page 1
Forum section: electronics / beginners

author: groinksan
author_rank: Contributor
timestamp: November 08, 2015, 11:49:20 am
content: Need help identifying this component. I attached it using clips to a transistor tester, and the tester reads it as a resistor @ 1995 ohms. Is it resistor? Attached two images of the component.Thanks!

author: Gyro
author_rank: Super Contributor
timestamp: November 08, 2015, 12:07:10 pm
content: Yes, looks like a close tolerance one to me.

author: andybarrett1
author_rank: Regular Contributor
timestamp: November 08, 2015, 01:28:29 pm
content: 2K Resistor200(1) = 1more 0 = 2000R = 2KBit like some SMD Devices !
Help Identifying a Component from a Power Conditioner Board - Page 1
Forum section: electronics / beginners

author: jmurphy
author_rank: Contributor
timestamp: May 14, 2024, 04:46:01 am
content: I was examining the guts of a power conditioner and came across a few components that I’m having trouble identifying. I've attached a photo of the components in question. It's an axial component, shaped quite like a diode, but it lacks any visible markings. There are several identical components and they all have labels that start with "BIT," and I'm curious about what this prefix might stand for.

author: srb1954
author_rank: Super Contributor
timestamp: May 14, 2024, 07:24:44 am
content: Quote from: jmurphy on May 14, 2024, 04:46:01 amThey are ferrite beads for suppression of RF noise.No idea what the "BIT" prefix stands for.

author: jmurphy
author_rank: Contributor
timestamp: May 14, 2024, 02:56:42 pm
content: I found a Chinese company selling matching ferrite beads on eBay and the part number started with BIT.Thanks!
Help: Identifying a component on the SMPS PCB - Page 1
Forum section: electronics / beginners

author: electrovanga
author_rank: Contributor
timestamp: October 25, 2023, 07:22:07 am
content: Hello fellows,I would like to know what this component is on the SMPS PCB. It looks like inductor but I am not sure.After Full bridge rectifier, these components are coming.

author: Roehrenonkel
author_rank: Frequent Contributor
timestamp: October 25, 2023, 08:25:44 am
content: Hi,Melf-resistors.Good luck

author: electrovanga
author_rank: Contributor
timestamp: October 25, 2023, 11:24:51 am
content: Quote from: Roehrenonkel on October 25, 2023, 08:25:44 amHello,Thanks for your support. What purpose are they used? When not normal resistors? What is the difference? Could you help me shortly, please?

author: wraper
author_rank: Unknown
timestamp: October 25, 2023, 11:48:58 am
content: They are normal resistors, MELF is package type.

author: Psi
author_rank: Super Contributor
timestamp: October 25, 2023, 11:51:03 am
content: They were popular for a while, before being mostly replaced with the package type we use now to reduce cost.You can still get them though, for some obscure things.They perform better for long term stability, moisture resistance and reliability.The color codes are the same as normal through hole resistors, afaik
Help Identifying a component. - Page 1
Forum section: electronics / beginners

author: RodgerE1
author_rank: Newbie
timestamp: April 11, 2013, 05:58:32 pm
content: Anyone know what this is?

author: c4757p
author_rank: Super Contributor
timestamp: April 11, 2013, 06:04:23 pm
content: Almost definitely a transformer for a switch mode power supply. They're usually custom, so you're probably not going to find much by looking up the number (I didn't).

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 11, 2013, 06:12:56 pm
content: Yes, SMPS transformer, 2 windings.Found it here: (C2802)http://www.shangming.com.tw/itemlist-EF.htmlIt says 8 pins there, but the rest seems to match. Do you think it's broken?

author: c4757p
author_rank: Super Contributor
timestamp: April 11, 2013, 06:15:29 pm
content: Quote from: PA0PBZ on April 11, 2013, 06:12:56 pmI'd say even that matches, if you don't count floating pins.

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 11, 2013, 06:16:56 pm
content: Quote from: c4757p on April 11, 2013, 06:15:29 pmYeah, but that is a weird way to specify your product.

author: SeanB
author_rank: Super Contributor
timestamp: April 11, 2013, 06:47:07 pm
content: The rest are to hold it to the board.

author: RodgerE1
author_rank: Newbie
timestamp: April 11, 2013, 06:55:13 pm
content: Wow, thanks for all the replies!
Help identifying a connector - Page 1
Forum section: electronics / beginners

author: MrSpike
author_rank: Newbie
timestamp: February 10, 2018, 09:46:34 pm
content: Hi there,I have accidentally discarded some electrical connectors which are still required. The original manufacturer of the equipment has since gone bust. At first I thought the connectors looked familiar and should be easy to replace but having spent 2 weeks solid searching I'm at a loss.. They look like JST or Molex range.They are 2x5 pin plugs, rectangular with two chamfered corners and a locking latch. In the images you can see the plugs and receptacles, I'm only after the plugs.Anyone have any idea?Thanks in advance,Mike

author: ez24
author_rank: Super Contributor
timestamp: February 11, 2018, 03:00:11 am
content: Just curious - did you go through all 12,000 here:https://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20180210181545&SearchText=10+pin+connector

author: Brumby
author_rank: Unknown
timestamp: February 11, 2018, 03:06:16 am
content: Some dimensions would be helpful.

author: MrSpike
author_rank: Newbie
timestamp: February 11, 2018, 08:40:22 am
content: Quote from: ez24 on February 11, 2018, 03:00:11 amFunnily enough after posting this message, I think I found a picture of the connector on Ali -https://www.alibaba.com/product-detail/Replace-Molex-JST-JAE-AMP-HRS_60585984056.htmlIf you click on the second thumbnail I reckon those are the ones. Still none the wiser though, it doesn't name the part

author: ez24
author_rank: Super Contributor
timestamp: February 11, 2018, 05:56:51 pm
content: Came across this last night:http://www.ipc.org/committee/drafts/7-31F_d_620B-Feb2012.pdfI found the name of a connector I was looking for in the manual

author: MrSpike
author_rank: Newbie
timestamp: February 15, 2018, 12:19:17 pm
content: The connector appears to be 6.5 X 13.25mm with a 2.54mm pitch. This was measured on a pair of calipers so may not be accurate to the .1 of a millimetre
Help identifying a generic 3D printer control board - Page 1
Forum section: electronics / beginners

author: tyguy2
author_rank: Unknown
timestamp: April 08, 2021, 05:18:10 am
content: Hello all,Recently got my hands on a 3D printer board pulled from Shenzhen (photos attached). I've been wanting to use them for a project, but the provided firmware is a horribly mangled version of Rep Rap from 2017 that's basically unusable. Random crashes, half Chinese UI, etc, etc. The only reason I want to use it is because I already have a bunch of them. I have access to the source code, so I know the pin definitions and a few other bits of essential info, but my main goal is to get Marlin running on the board instead of what's currently on it. I've tried editing the pin defs in Marlin to upload firmware to the processor on the board (STM32F104RET6), but the only thing that happens when I do that is the board stops communicating with Windows and I have to revert back to the old version of the firmware.I feel like this process would be infinitely easier if I had more information on the board (name, manufacturer, anything), or if anyone knew what I was missing in the Marlin config files to get this thing working. If anyone had any ideas for finding this board online, I would be glad to hear it!P.S. Wasn't sure if this went into the 3D printing section or the Beginner section, but since its more a question about finding a specific part rather than "3D printing" itself, I figured I was better off putting it here.
Help identifying a led bargraph. - Page 1
Forum section: electronics / beginners

author: Helix Vlad
author_rank: Newbie
timestamp: February 12, 2015, 11:20:35 pm
content: hello, how's everybody doing?Can anybody help me identify this unknown Siemens led bar-graph. I'm guessing these are Gallium Arsenide devices. But I would like to determine their exact parameters to avoid any future damages.
Help identifying a possibly fake Hakko - Page 1
Forum section: electronics / beginners

author: yq7nfcmg
author_rank: Newbie
timestamp: March 15, 2022, 03:58:49 pm
content: Hi all,I recently purchased a second hand Hakko FX951, the seller claiming it was an older model that he was replacing with a newer one.Although the price was suspiciously low, the pictures he provided looked genuine and he assured me he got it from a reputable reseller (Batter Fly).However, upon receiving the item, I noticed some things that got me thinking this might actually be some sort of clone. I attached some pictures.First of all, I've never heard of a FX951-12 version, I couldn't find anything online. Also, there's no plug for the auto-sleep feature.I'm still hoping that this is some kind of old discontinued model, but I'm now wondering if that's just a well made clone, so I figured I'd just ask the experts hereThanks!
Help identifying a replacement for a capacitor (that looks like a resistor) - Page 1
Forum section: electronics / beginners

author: mclarkson
author_rank: Contributor
timestamp: August 28, 2023, 02:15:57 am
content: I'm trying to build a replacement rom board for a old sega system 32 arcade board that I have. And all IC's have an associated Capacitor across the board.At first I thought that these were resistors, until I read the label, and then saw the forum post for these guys here -https://www.eevblog.com/forum/beginners/capacitor-looks-like-a-resistor/.After this though, even with the chart in the post above, I'm having a hard time getting the value of these (I think my math is 22,000 based on the charts, which doesn't make much sense to me). So my questions here are- Is Anyone able to determine the value of this? (Looks like the color coding is red-red-orange-white)- What would be a suitable replacement? (SMT is preferable in this case)Thanks a ton!

author: ledtester
author_rank: Super Contributor
timestamp: August 28, 2023, 02:20:34 am
content: The Wikipedia article:https://en.wikipedia.org/wiki/Electronic_color_code#Capacitor_color-codingsays that capacitors are measured in picofarads, so 22K is 22 nF.

author: tautech
author_rank: Super Contributor
timestamp: August 28, 2023, 02:24:41 am
content: First consider the application which appears to be IC decoupling where like ledtester thinks, I also believe the color banding indicates 22000pF.https://calculate.plus/en/categories/electric-capacitance/convert/22000/pF/to/microfarad

author: rsjsouza
author_rank: Super Contributor
timestamp: August 28, 2023, 02:26:24 am
content: The color code is in pF, thus 22k pF or 22 nF.These usually age very well and do not need replacement like their electrolytic cousins. I would leave them alone.Anyways, a suitable replacement could be a low voltage MLCC such as this one:https://www.mouser.com/ProductDetail/Vishay-BC-Components/K223K15X7RF53L2?qs=ODefv%2FJbNkg%252BWFUIQjDGkQ%3D%3D

author: JustMeHere
author_rank: Frequent Contributor
timestamp: August 28, 2023, 06:24:46 am
content: Look up the ICs and see what they need.

author: darkspr1te
author_rank: Frequent Contributor
timestamp: August 28, 2023, 07:23:54 am
content: There are some system32 schematics herehttps://gamesx.com/wiki/doku.php?id=schematics:console_related_schematicsdarkspr1te

author: Vovk_Z
author_rank: Super Contributor
timestamp: August 28, 2023, 07:57:53 am
content: I guess any kind of TH or SMD X7R 0.022-0.1 uF have to be fine, if it's power lines decoupling.

author: vk6zgo
author_rank: Super Contributor
timestamp: August 28, 2023, 02:43:05 pm
content: I have run into its opposite number----a resistor that looked for all the world like a dipped mica capacitor.(By courtesy of 1990s Sony).

author: DavidAlfa
author_rank: Super Contributor
timestamp: August 28, 2023, 03:30:11 pm
content: The modern standard would be X7R 100nF caps.
Help identifying a server fan connector - Page 1
Forum section: electronics / beginners

author: agehall
author_rank: Frequent Contributor
timestamp: February 24, 2020, 07:57:01 am
content: I need to get a few connectors like this one:Done some searching on Digikey but I just can't find anything that seems to match. The female sockets in the connector are too big to fit in ordinary dupont sockets. Anyone have suggestions for what I should be looking for?

author: tooki
author_rank: Super Contributor
timestamp: February 24, 2020, 12:18:15 pm
content: You might get a better response if you (carefully and precisely) measure all the important dimensions, especially the pin pitch.

author: TERRA Operative
author_rank: Super Contributor
timestamp: February 24, 2020, 12:52:22 pm
content: What is the thickness of the mating pins? The pin pitch? Model of server it came from?

author: agehall
author_rank: Frequent Contributor
timestamp: February 24, 2020, 03:37:01 pm
content: *duh*This is what happens when you get interrupted while posting and then just click the post button.Connector is for the fan module of an HP Cluster Platform 3000 chassis. Pitch is 2.54 mm. I measure the sockets to be 1.63x2.06x8.72mm (height of 2.06mm measured at the tip of the socket). The holes on the back of the connector measure 1.75x1.75mm.The connector is 21x3.46x9.1mm excluding the back flange. The flange measures 27.28x7.9x1.77mm. I'll try to get a drawing together later today.
Help identifying a switch - Page 1
Forum section: electronics / beginners

author: fabiodl
author_rank: Frequent Contributor
timestamp: September 05, 2020, 10:36:49 am
content: Have you ever seen this switch, or can you recognize the manufacturer?This is found in sega saturn pads (thus around 1995)The first pic (top, left) shows the only marking it has (besides 2A on the plastic) which may be a logo.it looks like a very stylized ア but it's so odd I am probably way off.the stem had diameter of 4.65mmthe body is 7mm x 7mmNone of the picshere at digikeyseem to match
Help identifying a symbol in GA30RV AMP SCHEMEATIC - Page 1
Forum section: electronics / beginners

author: Gar
author_rank: Newbie
timestamp: March 11, 2024, 05:00:25 pm
content: I am designing a layout of the Gibson Super Goldtone GA30RV amp and having trouble identifying one particular symbol I have not come across in the way it is used.Note in the attached image what appears to be a single side of a transformer symbol.This appears on the Heaters, Switches and Connectors page of the Pre-Amp supply.Since it states ECC83(12ax7) tubes and has reference to the Valve number(V1, V2, etc.) and ref's nodes 4 & 5 (as well as 9?) I am assuming the coils are referencing the heaters of those tubes.Please note also the ref's to the valve are named V1-C. etc.What the heck is the C telling me? Center tap? And why the Capacitors.I have not seen this done before.(see attached)Please note also that while I have built 1 Marshall amp and 3 Fender amps and the Fender Reverb unit in the past I am still a noob. Though I understand how it all works and I could possibly design an extremely simple amp from scratch - I am still learning.

author: Xena E
author_rank: Frequent Contributor
timestamp: March 11, 2024, 07:13:12 pm
content: Yes the "coils" are depicting the heaters within the valves.C = Centre tap, who knows, it's as good a reason as any.The capacitors are for local decoupling across the heaters, these are DC fed to minimise Hum.It's a poorly drawn circuit.Good luck with the build.X

author: BennoG
author_rank: Frequent Contributor
timestamp: March 11, 2024, 08:30:51 pm
content: The center tap is for 6.3V driving of the filament.then you connect both ends together and put them in parallel.In the drawn schema the filament is in series so 12.6 VThis is in later tubes to reduce the current draw for all filaments together.In old radio's the 6.3V tap of the transformer was a very beefy tap that could deliver a lot of amps for all the filaments.Benno
Help identifying a tact switch - Page 1
Forum section: electronics / beginners

author: Heppie
author_rank: Newbie
timestamp: August 29, 2015, 04:14:49 pm
content: I need to find a replacement for this mashed tact switch but as its so damaged i don't know what it is. Cheers in advance for any help.

author: picandmix
author_rank: Frequent Contributor
timestamp: August 30, 2015, 04:07:34 pm
content: Its hard to say exactly as you need to give the dimensions between and across the solder pads.Also hard to know how high the switch can sit and what actuates it.With those sizes , then you can trawl though Farnells/RS/ Rapids many pages of switches to try and find a match.A possiblity is one of these cheap little though hole switches you can buy from Maplins stores for a pound; you might be able to rework the pins to fit the pads.They do several of them but with different button heightshttp://www.maplin.co.uk/p/105b-tactile-switch-kr90x
Help identifying a Toshiba chip - Page 1
Forum section: electronics / beginners

author: newbie666
author_rank: Regular Contributor
timestamp: March 15, 2020, 04:36:55 pm
content: Hello,I'm looking at a PCB of an elektron drum machine and I can't identify one of the chips that are placed close to the main application IC (NXP Coldfire). I've already identified flash chip (in yellow), USB controller (in green), but can't find anything about the IC marked with red. Chip marking looks like toshiba symbol.Any tips on how to figure out what this IC do?

author: Yansi
author_rank: Super Contributor
timestamp: March 15, 2020, 04:41:25 pm
content: cFeon is likely an (Quad)SPI FLASH memory, the other thing not sure.Hard to even guess the third small chip as the photo does not even capture what is written on there and you are reluctant to give further info about what the board is from.

author: newbie666
author_rank: Regular Contributor
timestamp: March 15, 2020, 04:50:05 pm
content: Hey Yansi, thanks for help. As mentioned in my post I've got all chips but one marked in red already identified. Looking for some help to understand what the red one is.

author: dave_k
author_rank: Frequent Contributor
timestamp: March 15, 2020, 06:44:59 pm
content: It's a flash memory IC .. part number THGBMDG5D1LBAIT.

author: newbie666
author_rank: Regular Contributor
timestamp: March 15, 2020, 09:19:51 pm
content: thanks a lot dave_k.Can I bother you with explaining how you figured it out so that I won't have to ask same stupid questions over and over again?Thanks!

author: LateLesley
author_rank: Frequent Contributor
timestamp: March 16, 2020, 07:27:41 am
content: Well, I found it by googling "datasheet" plus part of the number. I first tried the AG5309 -strike 1, then tried the 18139, strike 2, then tried THGBMG5 - bingo! we have a winner.https://toshiba.semicon-storage.com/info/docget.jsp?did=12587Page 8it's e-MMC - 4Gbytes.
Help identifying an electrical connector - Page 1
Forum section: electronics / beginners

author: Vigo Doria
author_rank: Newbie
timestamp: June 19, 2023, 04:44:10 am
content: Hi all,I need to make a harness to connect to a BMS system I have, but I can't identify the connector after searching everything I know how to search. Could I have help identifying this?It's 22 pins, 2 rows of 11. Pin pitch is either 0.1 in or 2.5 mm and the pins are rectangular. Both connectors have "PBT-GF15" and "JST" written on the back. The gray one has "0101119 B H" on top and the white one has "0110118 F S" written on top. The body outer dimensions are roughly 31.6 mm wide, 16.8 mm tall, 19.5 mm deep (not including the PCB mount pins). The different colors have different keys.JST seems to be the best lead, but I can't find one that looks right or is 2.5mm pitch. Photos attached.Thanks!

author: Miha
author_rank: Contributor
timestamp: June 19, 2023, 05:32:58 am
content: Hello.In the last photo I can see "JST". So, you can find there:www.jst.comIn the "board to board connections" chapter of products.
Help identifying an IC - Page 1
Forum section: electronics / beginners

author: mancausoft
author_rank: Contributor
timestamp: October 28, 2019, 05:39:04 pm
content: I'm stuck looking for information about the chip in the attachmentthe last row is definitely the date code (it's different in other IC with that should be the same)And i can't found a datasheet with the other code...Someone have more info? or an hint to how found the correct model

author: jmelson
author_rank: Super Contributor
timestamp: October 28, 2019, 06:58:42 pm
content: I'm thinking this is a custom-labeled Bourns resistor array.Jon

author: Benta
author_rank: Super Contributor
timestamp: October 28, 2019, 07:24:58 pm
content: Yep, resistor array.

author: mancausoft
author_rank: Contributor
timestamp: October 28, 2019, 08:27:22 pm
content: Thanks, I need to de solder to get a better measurement, but shoul be a resistor arrayat the moment:1-20 10 Omh2-19 10 Omh3-18 10 Omh4-17 10 Omh5-16 10 Omh6-15 10 Omh7-14 10 Omh8-13 10 Omh9-12 10 Omh10-11 10 Omhall other combination 5 megaomh
Help identifying an smd component - Page 1
Forum section: electronics / beginners

author: newbie666
author_rank: Regular Contributor
timestamp: September 10, 2024, 12:28:26 pm
content: Hello,I need help with identifying the three legged (sot-23?) SMD component from the photo attached to this post. I'm fairly certain that it's a transistor (but not sure of the type).I've measured 1-2mV on pints 1 and 3 and 5V on pin 3. Again, by looking at the circuit pin 3 may be a gate.How can one figure out component type based on the marking? What's the deal with this rotated N (or a Z)? Is this a special kind of clue?Thanks for help!

author: selcuk
author_rank: Frequent Contributor
timestamp: September 10, 2024, 01:00:03 pm
content: It can be a diode to limit the input voltage to the opamp. Check CH0420LSPT in this page for example.https://smd.yooneed.one/code4238.html
Help Identifying an SMD component - Page 1
Forum section: electronics / beginners

author: Jterlato
author_rank: Newbie
timestamp: April 23, 2024, 07:17:19 am
content: Hi All I'm new here. Long time lurker, first time poster.Hoping someone could help me identifying the below SMD component that I need to replace in a USB keyboard (music). Its been knocked off the board by the back of a USB B port which came apart when the keyboard was dropped with the USB cable connected.Looks like its involved in a USB power circuit. I'm having trouble identifying it based on its markings, and i cant test it as its been destroyed. Any ideas?

author: Ian.M
author_rank: Super Contributor
timestamp: April 23, 2024, 07:45:59 am
content: https://www.lcsc.com/product-detail/MOSFET_Vishay-Intertech-SI2371EDS-T1-GE3_C467897.html

author: aliarifat794
author_rank: Regular Contributor
timestamp: April 23, 2024, 07:51:11 am
content: Quote from: Ian.M on April 23, 2024, 07:45:59 amThank you so much! I googled with the keyword E6NSA and found nothing!

author: Vovk_Z
author_rank: Super Contributor
timestamp: April 23, 2024, 08:21:19 am
content: Quote from: aliarifat794The whole this code usuallly contains a date of production so doesn't help. Try to google firts two-three letters combined with a case type code. Like "E6 sot23" etc

author: Jterlato
author_rank: Newbie
timestamp: April 23, 2024, 09:55:17 am
content: thank you Ian, life saver!
Help identifying ceramic bead diode? - Page 1
Forum section: electronics / beginners

author: cowboy
author_rank: Newbie
timestamp: June 22, 2021, 07:09:43 pm
content: This appears to be a diode, and tests out as one, if you look closely at the photo (diode shown with yellow arrow pointing to it), you will see a dull grey stripe near the black end of the diode (between the blue dot and black area).The diode I am trying to identify the type and parameters of, is identical to this one, except that the grey stripe is black. (it shattered after a short) - It has the same 4 blue dots in the white area - but like the one photographed, no numbers or letters on it. So identical to photo, except black stripe rather than faint grey stripe, near black end, and 4 blue dots in the white area. Found on Nissan engine computer.

author: Benta
author_rank: Super Contributor
timestamp: June 22, 2021, 07:50:37 pm
content: Not ceramic, but sintered glass. Very reliable and typically used in automotive applications.Check out vishay.com you'll probably find the right diode/rectifier there.

author: TimNJ
author_rank: Super Contributor
timestamp: June 22, 2021, 11:21:15 pm
content: Package is SOD-57 or SOD-64. Strange that there are no markings. I think Vishay is the primary manufacturer of this style diode and I'm pretty sure they've always printed the P/N on the body.How about on the under-side of the diode on the board? If it's a short P/N like BYV26C, could be hidden on the bottom.

author: cowboy
author_rank: Newbie
timestamp: June 23, 2021, 02:22:30 am
content: OK, took some measurements with digital caliper, measures too large to be SOD-57 package, so that leaves SOD-64So I came up with these candidates:https://www.digikey.com/en/products/filter/diodes-rectifiers-single/280?s=N4IgjCBcpgbFoDGUBmBDANgZwKYBoQB7KAbRABYAGcgDlgGYQBdAgBwBcoQBldgJwCWAOwDmIAL4EwAJgCcEaCGSR02fEVIVqdSiAJVasaczadIPfsLGSQAWmOLl-AK7rikMgFZmN2wqSomLgE7mSwlBHS8FIyPjbeiqxQYGxJkGARNvCKAgAmXH6UjKZceiDsAJ6sOFy5WMji4kAbut which one, and is it avalanche type or standard?This circuit board is from the 1990's, I am thinking that the 4 blue dots + the black stripe probably would probably tell the specifications, if someone know how to decode that. Still no part number found, and ECU's are proprietary, no schematics available is the norm.

author: amyk
author_rank: Super Contributor
timestamp: June 23, 2021, 03:42:49 am
content: The black stripe is not distinctive, the blue dots are.As the above poster remarks, have you checked the underside?

author: RayRay
author_rank: Frequent Contributor
timestamp: June 25, 2021, 11:25:27 pm
content: Quote from: cowboy on June 23, 2021, 02:22:30 amThe diode in thc pic is definitely avalanche/sinterglass (these terms are interchangable, and refer to the same thing)But you can't just wing it and stick whatever diode in there! What exact product (make/model) does the board belong to? Does the board have any identifying numbers on it (I.E part number) either printed directly on it or on a sticker?