hybridfree/eevblog-posts huggingface dataset:
What is this board to board connector? - Page 1
Forum section: electronics / projects

author: bson
author_rank: Unknown
timestamp: January 04, 2020, 06:13:00 pm
content: In the EEVblog video comparing Uniden HTs,at 26:48, at the far 3 o'clock in the frame there's a white board-to-board connector. Does anyone know what make and model this (and its corresponding mate) could be?

author: chris_leyson
author_rank: Super Contributor
timestamp: January 04, 2020, 07:12:49 pm
content: Looks like Hirose DF12 or DF17, 0.5mm pitch

author: bson
author_rank: Unknown
timestamp: January 05, 2020, 01:41:04 am
content: Thanks!!! Looks like the DF12 is it! Comes in 3-5mm stack heights.https://www.hirose.com/product/document?clcode=&productname=&series=DF12&documenttype=Catalog&lang=en&documentid=D31693_en
What is this called? - Page 1
Forum section: electronics / projects

author: blueskull
author_rank: Unknown
timestamp: April 25, 2016, 07:02:47 am
content: What is this connector called? The one with one pin plugged so that you can not plug it in the wrong direction.Where can I buy housings for this connector? Or where can I buy pin "plugs" for a 2.0mm Milli-Grid connector?I do not want to pay extra shipping cost, so it will be better if I can get them from Mouser.As a reference, the connector housing I'm using is Mouser 51110-1050. I want one with a corner hold plugged, or a plug that I can permanently plug into its corner hole.The connector in this picture has 2.54mm pitch, I need 2.0mm pitch.Thanks in advance for all inputs.

author: ataradov
author_rank: Super Contributor
timestamp: April 25, 2016, 07:37:07 am
content: Searching for "key plug for IDC sockets" leads to this -http://www.toby.co.uk/content/catalogue/products.aspx?series=KP-01There is not too many hits on this kind of stuff.But search result is interesting on its own. It looks like plugging any number of pins is an option from many manufacturers, subject MOQ, of course. Nut much information on standalone plugs, although I've seen then in actual products, so they can't be that rare.

author: David_AVD
author_rank: Super Contributor
timestamp: April 25, 2016, 07:52:37 am
content: For what it's worth, I buy these onAliExpressfor about AUD $16 per 200 shells.

author: rdl
author_rank: Super Contributor
timestamp: April 25, 2016, 07:59:48 pm
content: You should be able to recreate that connector using Molex SL series parts. Mouser sells them. You'd want a dual row 10 pin housing, the crimp on connectors to fit, and a key plug. AMP/TE has similar connectors.
What is this chip ? - Page 1
Forum section: electronics / projects

author: ChrisGreece52
author_rank: Frequent Contributor
timestamp: February 15, 2018, 12:01:33 am
content: Hello i got a cheapo rgb led strip with a usb controller board from ebay (like this onehttps://www.ebay.com/itm/M-RGB-LED-Strip-Light-Back-Light-Kit-USB-24Key-IR-Remote-Controller-Set-60SM-AU/112763805547?hash=item1a413f1f6b:m:m9bXeDkdQ5VItyzo7MC6u1Q)and i wanted to hack it just for fun.The ics on the board are a 24C02N (Marked ATMEL 542 24C02N) and another 14 pin I2C ic which markings were laser etched off.Not knowing what the other ic did i found the datasheet for the 24C02N and hooked up 6 wires on all its pins (i should have wired only the i2c pins but i wanted to know what every pins state was) and tried to read the output of the I2C bus when i pressed one of the 3 buttons with my logic analyzer.(fs : 20Khz , 10MSamples)Here is the data i collected the first picture corresponds to the "mode" button the second to the "speed,brightness" button and the third to the "color" button.First Pic :Second Pic :Third Pic :I would love to know what the ic is if you can figure it . Next step would be reverse engineering the whole board. If you need any more info please feel free to ask. Thank you.
What is this chip? - Page 1
Forum section: electronics / projects

author: motocoder
author_rank: Unknown
timestamp: June 17, 2014, 04:13:12 pm
content: I've tried searching the various numbers on this chip, but can't figure out what it is. It's one of two chips (the other is an ST 8-bit micro) on an ultrasonic distance sensor.Does anyone know what this chip is? I'm guessing a transistor array, or maybe a comparator? Not sure.

author: PE1RKI
author_rank: Regular Contributor
timestamp: June 17, 2014, 04:21:04 pm
content: lmv 358 i

author: AndyC_772
author_rank: Super Contributor
timestamp: June 17, 2014, 04:27:20 pm
content: http://www.ti.com/lit/ds/symlink/lmv324.pdf

author: motocoder
author_rank: Unknown
timestamp: June 17, 2014, 04:54:37 pm
content: Thank you!
What is this circuit doing? - Page 1
Forum section: electronics / projects

author: elimenohpee
author_rank: Contributor
timestamp: January 03, 2020, 09:30:16 pm
content: I developing an application where I need to current share a couple of external, stand-alone DC switch mode power supplies. I'm planning to use TI UC2907 as a load share controller. There aren't any application notes specifically on this chip, but there is a note on UC3907 with an approach that I want to use. It looks like it ties into the sense feedback lines to drive/share the current between the supplies.In the application note it shows a rough schematic of the approach (see the attached image), but I'm a little confused what the highlighted portion is doing. It looks like it's clamping the emitter of the transistor at the chip's reference voltage but I don't really understand why. Does anyone have any idea what this portion of the circuit is doing?

author: Mr Evil
author_rank: Regular Contributor
timestamp: January 03, 2020, 11:15:16 pm
content: From looking at the block diagram in thedatasheet, pin 8 is a 1.75V reference voltage, so it will pull up the emitter of the transistor by a few hundred millivolts, preventing it from pulling down on the power supply's sense line until the output from the adjust amplifier rises above a threshold. Without spending too much time trying to work it out, it seems that this is because the output from the adjust amplifier is >0V under quiescent conditions, so R3 prevents it from constantly trying to adjust the power supply's output even when there is no current output from it.
What is this coil in AC speed controller? - Page 1
Forum section: electronics / projects

author: Tuppe
author_rank: Contributor
timestamp: July 19, 2015, 05:40:29 pm
content: Hello, I'm investigating this air conditioning fan speed controller unit, which appears to have interesting components.I'm first year EE stundent and I have no clue what that huge coil and the "sensor"(or another coil?) inside it are supposed to be and how they work. Is is some sort of transformer?Can someone give me tips on this one? I couldn't find such coil arrangement in any AC speed controller circuits.Thank you!

author: DanielS
author_rank: Frequent Contributor
timestamp: July 19, 2015, 06:31:38 pm
content: My guess is this is simply a single phase SCR control and the inductor is there to provide 0-180 degree trigger phase delay - essentially the same circuit as a filament lamp dimmer.

author: Tuppe
author_rank: Contributor
timestamp: July 19, 2015, 10:17:35 pm
content: Quote from: DanielS on July 19, 2015, 06:31:38 pmThanks! What would be then that component in the middle of the coil?I guess it's either a cap or a safety thermistor...?
What is this component? - Page 1
Forum section: electronics / projects

author: guiddruid
author_rank: Newbie
timestamp: December 24, 2022, 12:22:08 pm
content: 16 pin quad package, almost certainly a DCDC converter (product is 5 channel isolated 24v->9v DCDC). Marked "AJE BAC":https://alfalfasprout69.wixsite.com/ojai/gut-shot-pictures?lightbox=dataItem-kjnmlxcf3No vendor markings. No likely hits in the online databases I found.Any ideas?

author: guiddruid
author_rank: Newbie
timestamp: December 29, 2022, 04:22:01 pm
content: I have uploaded some more pics of my own here (not exact same product):https://imgur.com/a/ZsE3fcwThe parts are marked AJE BA1 in my unit, so presumably the last digit is a lot number.From what I can make of it, it's a very odd looking DCDC circuit. There's a small Torexsemi XC9225, 3.2 volts DCDC which I don't think is using the large transformers at all.Why would there be 2 DCDC converters for each output? I remember reading somewhere the designer (contractor?) had an aerospace background. The whole circuit is way more complex that I have expected.FWIW - this is a Strymon Zuma (/Ojai), which is a fancy multichannel power supply for guitar effects.
What is this component ?  - Page 1
Forum section: electronics / projects

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: April 30, 2016, 09:16:07 am
content: I am searching to understand the coding of the toner chips in Laser printers.I have for the moment failed on the Lexmark CS310 chiphttps://www.eevblog.com/forum/projects/lexmark-toner-chip-ti046b1/msg925378/#msg925378and in order to make some progress, experiment with another chip from a Toshiba toner.But I cannot recognise the chip. I made a schematics, but may have swap GND and VCC ?What do you think ?The component is marked 324 4LS but what is It ?

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: April 30, 2016, 10:32:57 am
content: After testing, I have an answer for I2C communication with1 -> VCC2 -> SCL3 -> SDA4 -> GNDWith an I2C address of 0x61

author: JacquesBBB
author_rank: Frequent Contributor
timestamp: April 30, 2016, 12:31:25 pm
content: The problem is that I am not able to communicate with it using I2C with bus pirateI2C>(1)Searching I2C address space. Found devices at:0x00(0x00 W) 0xC2(0x61 W) 0xC3(0x61 R)I2C>[0xC2 0 0 1 2 3 4 5]I2C START BITWRITE: 0xC2 ACKWRITE: 0x00 ACKWRITE: 0x00 ACKWRITE: 0x01 ACKWRITE: 0x02 ACKWRITE: 0x03 ACKWRITE: 0x04 ACKWRITE: 0x05 ACKI2C STOP BITI2C>[0xC2 0 0][0xC3 r:5]I2C START BITWRITE: 0xC2 ACKWRITE: 0x00 ACKWRITE: 0x00 ACKI2C STOP BITI2C START BITWRITE: 0xC3 ACKREAD: 0xFF ACK 0xFF ACK 0xFF ACK 0xFF ACK 0xFFNACKI2C STOP BITDoes anybody have a clue ?
What is this component? - Page 1
Forum section: electronics / projects

author: opa627bm
author_rank: Regular Contributor
timestamp: April 02, 2014, 07:58:52 am
content: Hello Everyone,I was digging through some of the old stuff from a retired physics professor and I found a tube of ICs that is marked 810C, it is in 6 pin dip package and the maker is fair-child. Can someone tell me what that part is for ? Thanks!

author: ve7xen
author_rank: Super Contributor
timestamp: April 02, 2014, 08:23:41 am
content: I would guess it's thishttp://www.fairchildsemi.com/ds/CN/CNY173M.pdf6-DIP is almost always an optocoupler, this seems to fit with same manufacturer and similar part no. Maybe a newer version or something.
What is this connector!? - Page 1
Forum section: electronics / projects

author: twigg10112
author_rank: Newbie
timestamp: June 11, 2022, 12:47:42 am
content: Hi all, I am repairing my Raymarine GPS and I cannot for the life of me identify this ribbon cable connector.It's a 24 pin but it the ribbon goes in from the bottom, and locks from the top in the photo. I have attached a photo. Open to suggestions, I need to replace both the ribbon and one connector.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 11, 2022, 02:49:27 am
content: FFC/FPC. Measure the pin pitch, contact length, thickness, connector body, etc., count pins, and see if anything likely pops up:https://www.digikey.com/en/products/filter/ffc-fpc-flat-flexible-connectors/399?s=N4IgTCBcDaIGZwMYgLoF8gTim
What is this connector called? - Page 1
Forum section: electronics / projects

author: dicky96
author_rank: Regular Contributor
timestamp: November 26, 2019, 09:36:53 am
content: Hi guys.I lost the lead for this external 2.5 HDDWhat is this connector called? The lead had USB on one end and this on the otherI did open the case up thinking there was just a sata drive inside but this connector goes directly to the HDD. I can't find what I want on ebay because i don't know what to search for. It's not a USB to SATA as I thought.

author: Rerouter
author_rank: Super Contributor
timestamp: November 26, 2019, 09:40:36 am
content: It is called a micro USB3.0, but you can use a normal micro USB cable with it at slower speeds.

author: dicky96
author_rank: Regular Contributor
timestamp: November 26, 2019, 03:57:30 pm
content: thanks
What is this connector called? - Page 1
Forum section: electronics / projects

author: mojoe
author_rank: Frequent Contributor
timestamp: April 19, 2016, 05:33:51 am
content: This is a very common connector, but I don't know what it is called. I'd like to order some. Sorry for the blurry picture. My phone camera doesn't focus well this close.

author: KE5FX
author_rank: Super Contributor
timestamp: April 19, 2016, 06:49:41 am
content: Lots of vendors offer connectors like that, but the name you probably want to look at first would be Molex.

author: ajb
author_rank: Super Contributor
timestamp: April 19, 2016, 11:25:42 am
content: Molex's KK series and TE's MTA series both have very similar headers. The spacing of the slots in the locking tab may be customizable for keying purposes, in which case you might not find a perfect match off the shelf.

author: Tomorokoshi
author_rank: Super Contributor
timestamp: April 19, 2016, 11:41:49 am
content: Yes, looks like MTA100 with the slots to accommodate the side tabs from wire-end connectors. Are there three separate cables that plug into this side-by-side?

author: mojoe
author_rank: Frequent Contributor
timestamp: April 19, 2016, 12:43:26 pm
content: I don't have any mating cables, but I assume it was just one plug.

author: tuvix
author_rank: Newbie
timestamp: April 22, 2016, 02:15:06 am
content: Vertical friction lock, polarized molex connector, etc. Here are the ones I buy from Mouser.http://www.mouser.com/Search/ProductDetail.aspx?R=22-23-2021virtualkey53810000virtualkey538-22-23-2021Mating header:http://www.mouser.com/ProductDetail/Molex/22-01-2021/?qs=sGAEpiMZZMtVoztFdqDXO9AtJeNgVE9KThe last two digits set the pin count. For instance 21 = 2 pin, 23 = 3 pin, etc. Be careful to order bulk crimps NOT tape reel. they never fit right in the housings.
What is this connector on Fluke 190 Scopemeter or Anritsu Spectrum master - Page 1
Forum section: electronics / projects

author: brint.corb
author_rank: Contributor
timestamp: February 18, 2024, 12:02:22 am
content: My Anritsu spectrum master 12V/4A supply broke. I can find lots of these PS on ebay but the connector is wrong. The original It is 5mm OD barrel, with a plastic ring 6mm OD at the end, and the ID (PIN diameter) is 1.8mm. It is also the exact size in my Fluke 190 scope. Im guessing its a DIN job.
What is this DC plug/Where can I get one? - Page 1
Forum section: electronics / projects

author: Hobgoblin612
author_rank: Contributor
timestamp: May 25, 2015, 03:19:22 am
content: Hi all,I am looking for a part number or supplier for this DC plug. It is from a Panasonic Toughbook model CF-52 laptop.Here are some measurements.I have looked on Digikey and Element14 with no success.The reason that I need one is I bought a 12v step up laptop power supply so I could charge it in a vehicle but none of the plugs that came with it fit. (Nor do any of the couple dozen in my parts drawer.)One thing to note is the step in the plastic molding, that fits into the housing of the laptop for extra strength.If I cant buy the plug by itself then my only option is to buy a complete second hand power supply (for ~$100) and cut the plug off it.Thanks, Timothy.

author: amyk
author_rank: Super Contributor
timestamp: May 25, 2015, 05:02:02 am
content: I would check the ID again carefully, since 5.5/2.1 barrel jacks are one of the common sizes.

author: jwm_
author_rank: Frequent Contributor
timestamp: May 25, 2015, 05:35:53 am
content: The yellow tipped barrel plugs are actually EIAJ standard plugs with set voltage ranges per size. Most stuff from Japan conforms to it.http://en.m.wikipedia.org/wiki/EIAJ_connector
What is this device? - Page 1
Forum section: electronics / projects

author: Prehistoricman
author_rank: Regular Contributor
timestamp: February 25, 2020, 11:41:09 pm
content: I found this odd looking 3-terminal device in a laptop battery pack. The board does the charge controlling.Is this some kind of thermal fuse? It's glued onto these two power FETs. But why 3 terminals for a fuse and not 2?It's been a long time since I took this picture. I might not have the board any more and I certainly don't have it immediately on hand to do any tests on, sorry.

author: ataradov
author_rank: Super Contributor
timestamp: February 25, 2020, 11:52:12 pm
content: It looks like there is F1 poking from under the pin. It is likely to be a thermal fuse. The third terminal is likely for mechanical reasons. It does not seem to be connected anywhere as well.

author: xavier60
author_rank: Super Contributor
timestamp: February 25, 2020, 11:53:39 pm
content: I used to think it's a fuse with a built in heater. The fuse can be instructed to go open by energising the heater part. The idea is so that the BMS can blow the fuse without needing a crowbar circuit that can handle the full fusing current.I used to be able to find info with a Google search, today I find nothing so far.

author: xavier60
author_rank: Super Contributor
timestamp: February 25, 2020, 11:58:15 pm
content: https://www.schott.com/epackaging/english/cutoff/sh_type.html

author: Cerebus
author_rank: Super Contributor
timestamp: February 26, 2020, 12:08:39 am
content: Quote from: xavier60 on February 25, 2020, 11:53:39 pmTFTFY

author: amyk
author_rank: Super Contributor
timestamp: February 26, 2020, 01:24:09 am
content: http://battery.newlist.ru/images2/Fuse.pdf

author: ArthurDent
author_rank: Super Contributor
timestamp: February 26, 2020, 02:45:54 am
content: Yes, it is a fuse as everyone has said. What is strange is I've never seen one before today. I bought a battery pack at GoodWill for cheap that I bought to get the 18650 Samsung cells for other projects. When I dismantled (read as ripped open) the battery pack I got 12 good cells and I saw the controller board that had the same thermal fuse. Here's a photo of the one I just discovered. The fuse is not glued to the chips but the white hard pasty stuff is silastic that is used all over the batteries and board to keep them from being loose in the plastic case.

author: Prehistoricman
author_rank: Regular Contributor
timestamp: February 26, 2020, 10:53:35 am
content: Quote from: ArthurDent on February 26, 2020, 02:45:54 amThat's pretty crazy how you just found this identical device.Thanks for the responses guys. It also looks like it's made specifically for this application - in laptop BMSs - due to the elongated shape.
What is this device? Its between the source DC and the load - Page 1
Forum section: electronics / projects

author: nelscoll
author_rank: Newbie
timestamp: May 11, 2018, 09:22:29 am
content: What is this device? Its between the source DC and the load

author: DC1MC
author_rank: Super Contributor
timestamp: May 11, 2018, 09:25:27 am
content: Ferrite bead filter:https://en.wikipedia.org/wiki/Ferrite_beadCheers,DC1MC
what is this electronic device ? 3D radiation detector ? - Page 1
Forum section: electronics / projects

author: oz2cpu
author_rank: Frequent Contributor
timestamp: August 13, 2022, 06:23:46 am
content: my latest : What is this Electronic device ?so far i dont know, will edit text here, if we figure it out, please comment, please help, please say if you know, or just guess..Some times i get special science technology into my lab, this one looks like a one-off unit, no names on the main unit this one was pulled from, and i dont have any Pictures from the complete unit, it was not taken apart by me.https://youtu.be/E6UunaM6YSs
What is this flexible component? - Page 1
Forum section: electronics / projects

author: Nikos A.
author_rank: Regular Contributor
timestamp: June 04, 2024, 06:15:55 am
content: Hi guys,In many smartphones, as part of the NFC antenna (at least, I guess that this is the NFC antenna), there is a flexible extension.Does anyone know what this is and what its purpose is? Maybe this is irrelevant to the NFC and is something like an EMC shield?

author: brumbarchris
author_rank: Regular Contributor
timestamp: June 04, 2024, 06:53:57 am
content: Could it be a ferrite foil, meant to optimize functionality of the NFC antenna?Cristian

author: Nikos A.
author_rank: Regular Contributor
timestamp: June 04, 2024, 02:02:15 pm
content: Google for ferrite foil it looks very simiral material. I am wondering though why it extends beyond the NFC antenna down to the battery
What is this from a TELEFUNKEN radio from 1958? - Page 1
Forum section: electronics / projects

author: ElektroQuark
author_rank: Unknown
timestamp: August 23, 2017, 05:52:02 pm
content: The radio is a GranVals 58.It has been working but stored for years.I have rescue it from the garage, but it doesn't work now.There was this component lose inside.It's a glass tube.It's marked as:TELEFUNKEN40.075.10/100KD/ECWhat is it?

author: Kleinstein
author_rank: Super Contributor
timestamp: August 23, 2017, 06:40:11 pm
content: It looks like a capacitor. Glas tube and sealed with a kind of tar was a common construction back than.

author: calexanian
author_rank: Super Contributor
timestamp: August 23, 2017, 07:02:27 pm
content: Correct. That is a wrap and fill foil type cap. Today we mold them in plastic or use a film wrap. Back then they stuffed them in paper or glass tubes and sealed them with either wax, tar, or resin like this one. They rarely go bad.

author: ElektroQuark
author_rank: Unknown
timestamp: August 23, 2017, 07:18:35 pm
content: It measures about 250 nF.But my ESR tester overloads.Is it polarized?

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 23, 2017, 07:50:30 pm
content: Now try to find it?

author: schmitt trigger
author_rank: Super Contributor
timestamp: August 23, 2017, 08:36:38 pm
content: Hmmmm..-scratching head-Let me take a wild guess. It is C58. The one that goes from the AC mains to ground.BTW, I love the look of these hand-drawn schematics

author: ElektroQuark
author_rank: Unknown
timestamp: August 24, 2017, 07:24:10 am
content: Thanks PA0PBZbut schematics are included in the bottom lid of the unit.
What is this DOT OR gate in this 8b/10b article? - Page 1
Forum section: electronics / projects

author: Dmeads
author_rank: Regular Contributor
timestamp: June 12, 2020, 09:53:21 pm
content: Hey! working on 8b/10b in Verilog. Im using the original 1983 IBM article to structurally code it. Cant seem to find what this gate is (see pic)All is says is " OR DOT"any ideas?Here is the original article. The gate shows up on pg. 11https://opencores.org/websvn/filedetails?repname=1000base-x&path=%2F1000base-x%2Ftrunk%2Fdoc%2F01-581v1.pdf

author: ataradov
author_rank: Super Contributor
timestamp: June 12, 2020, 10:41:38 pm
content: I've heard a name "Dot OR" for wired-AND circuit where AND is implemented by connecting two open-collector outputs together. I'm not sure if that makes sense in this context.Here is a descriptionhttps://en.wikipedia.org/wiki/Wired_logic_connection

author: Dmeads
author_rank: Regular Contributor
timestamp: June 12, 2020, 11:14:40 pm
content: Okay I did some digging and I found the authors used Motorola's MECL (Monolithic Emitter Coupled Logic) 10000 series chips to implement the design so ya, you're probably right. Thanks!

author: jmelson
author_rank: Super Contributor
timestamp: June 13, 2020, 02:18:44 am
content: Quote from: ataradov on June 12, 2020, 10:41:38 pmIn ECL, it is actually a "wired OR" as the gate outputs pull up when active, and let the pull-down resistor control the logic level when not active. So, if either gate output is active, the logic level gets pulled up to a '1'.Jon

author: fourfathom
author_rank: Super Contributor
timestamp: June 13, 2020, 02:35:40 am
content: Logically it's a NOR gate.out = !(A | B)

author: helius
author_rank: Super Contributor
timestamp: June 13, 2020, 03:37:22 am
content: Each AND gate (the symbol that looks sort of like an 'A' is a ∧) has two inputs and two outputs. The inputs are inverted, indicated by a small triangle at the end of the wire. In the most common symbology this is indicated instead by a small circle on the wire. Only the bottom output is inverted, and the top output is normal. By De Morgan's rule, this is equivalent to a NOR gate (for the top output) and an OR (for the bottom output).The Wired-OR of the normal outputs of the two AND gates is an EQV of a and b. It is true iff A=B.This kind of two-output, one-normal one-inverted is a natural use of ECL since it is current switching logic. Current is switched to exactly one of two possible paths.

author: Dmeads
author_rank: Regular Contributor
timestamp: June 13, 2020, 04:16:17 am
content: Quotehmm. wierd. Okay so just to reiterate (so I dont screw up my code more than I already have) The OR DOT is True if A = B, and the AND gates have inverted inputs, so are like a negative AND gate. The top output is a NOR function, and the bottom output is inverted so OR.Thanks guys, really appreciate it.
What is this IC? (757-1 2143) - Page 1
Forum section: electronics / projects

author: crgarcia
author_rank: Regular Contributor
timestamp: September 27, 2022, 02:47:28 pm
content: How could I figure out what is this IC?The only thing it says is:757-12143Thanks!

author: MarkF
author_rank: Super Contributor
timestamp: September 27, 2022, 03:05:11 pm
content: What is the device?It could be a dual difference amp.

author: tunk
author_rank: Super Contributor
timestamp: September 27, 2022, 03:06:06 pm
content: What does it do?"2143" could be a date code, and given the PCB is marked ST757,I'd guess the original marking is removed and then remarked.

author: coromonadalix
author_rank: Super Contributor
timestamp: September 27, 2022, 04:40:33 pm
content: is it an power supply ??

author: Terry Bites
author_rank: Super Contributor
timestamp: September 27, 2022, 06:11:53 pm
content: 2143 is likely a date code. YYWW, 2021 OCtober.Interesting that the PCB has the same base number. That can't be a coincidence.Who makes this PSU looking thingy, what is it part of?

author: srb1954
author_rank: Super Contributor
timestamp: September 27, 2022, 08:18:36 pm
content: It could be a customised microprocessor since the marking is the same as the PCB number.

author: Fraser
author_rank: Super Contributor
timestamp: September 27, 2022, 11:17:21 pm
content: Looks to be a Radar based human presence detector. That IC carries a OEM code.https://www.alibaba.com/product-detail/New-Inventions-Indoor-Waterproof-Small-PC_60566331046.htmlIt may be helpful to reverse engineer the PCB around the 757-1 IC as it could turn out to be something simple like a quad op-amp
What is this IC - Page 1
Forum section: electronics / projects

author: haseeb zaib
author_rank: Contributor
timestamp: June 09, 2022, 09:21:04 am
content: Hi, I am trying to find information regarding this IC. But unfortunately I cant find anything related to these. Only thing I know that one of the ICs is from analog devices from the llogo on the IC1)733e3 (analog device logo)2)4LCI7153

author: inse
author_rank: Super Contributor
timestamp: June 09, 2022, 09:32:36 am
content: 733 is the datecode, search for LT1300 at Analog.comI cannot recognize much from the other ICIs this a microchip logo, maybe its a EEPROM??

author: strawberry
author_rank: Super Contributor
timestamp: June 09, 2022, 10:09:33 am
content: microchip 24LC series EEPROM

author: gamalot
author_rank: Super Contributor
timestamp: June 09, 2022, 10:27:22 am
content: Yes, it's 24LC128Thttps://ww1.microchip.com/downloads/en/DeviceDoc/24AA128-24LC128-24FC128-128K-I2C-Serial-EEPROM-DS.pdf

author: coromonadalix
author_rank: Super Contributor
timestamp: June 09, 2022, 02:07:45 pm
content: Lt 1300https://www.analog.com/en/products/lt1300.html

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 09, 2022, 05:40:43 pm
content: Quote from: coromonadalix on June 09, 2022, 02:07:45 pmYep, this one was quite obvious.I think the OP may have had a harder time than needed to find it due to the fact the logo to them is "Analog Devices" (because AD bought LT, and the OP may not have known LT before), but this is clearly a LT logo and anyone having used LT ICs would recognize it and guessed it was either a LT1300 or LTC1300 (if that exists), since that's how most of their parts were referenced.

author: haseeb zaib
author_rank: Contributor
timestamp: June 10, 2022, 10:01:15 am
content: guys thank you so much for the help I really appreciate <33333333333
What is this IC? NEC 1299 662 - Page 1
Forum section: electronics / projects

author: Valden
author_rank: Regular Contributor
timestamp: April 02, 2023, 09:14:44 am
content: As per the title, is anyone better at using search engines than me? I can’t find anything on the NEC 1299 662 IC, shown in the attached pic. It’s on a board in the faceplate of a Becker CDR-220 car radio/CD player. I have a thread in the repair forum on this; the LCD is not displaying.Any clues on this NEC thing? Thanks. If so, where did you look?

author: retiredfeline
author_rank: Frequent Contributor
timestamp: April 02, 2023, 09:26:19 am
content: I have no idea, but just a hunch that's the date code you have there. The part ID may be the 0128K3006.

author: Valden
author_rank: Regular Contributor
timestamp: April 02, 2023, 02:20:28 pm
content: Quote from: retiredfeline on April 02, 2023, 09:26:19 amYou might be right about that Sir. The radio would have been made in 2001.I’ve searched for every combo of the numbers on the chip. Blank. How strange. This is the first time I’ve been stumped.

author: tooki
author_rank: Super Contributor
timestamp: April 02, 2023, 11:07:29 pm
content: If it was made in 2001, then 0128 could also be the date code (28th week of 2001).

author: Valden
author_rank: Regular Contributor
timestamp: April 02, 2023, 11:18:27 pm
content: Maybe I should ask, ‘What’s the date code on this chip?’ and someone will tell me what it is instead. Ha! 😄

author: amyk
author_rank: Super Contributor
timestamp: April 02, 2023, 11:51:12 pm
content: https://www.manualslib.com/manual/989687/Becker-Mercedes-Benz-My99.html?page=27IC2001 1299662 IC-CH NEC UPD 754302-3200-04/98https://www.manualslib.com/manual/1055580/Becker-Audio-30-Ece-Typ-3300.html?page=35IC1802 1299662 IC-CH NEC UPD 754302-3200-04/98Fortunately, uPD754302 leads us tohttps://datasheetspdf.com/pdf/298543/NEC/UPD754302/1Ironically, '302 is the one that isn't recommended for automotive, while '304 is the one recommended for automotive applications. It's a 4-bit MCU with very interesting register names: XA, BC, DE, HL...

author: Valden
author_rank: Regular Contributor
timestamp: April 03, 2023, 06:41:40 pm
content: Thanks amyk. I’ll have a think about what this might be for. It could be used to store the model of the car, which is displayed for a few seconds after turning the Becker unit on.I’ll guess that you used one of the usual search engines. Your results make me wonder about the extent to which people in different parts of the world are shown different things.
What is this inductor? - Page 1
Forum section: electronics / projects

author: microbug
author_rank: Frequent Contributor
timestamp: February 24, 2016, 06:25:22 pm
content: See attached image from LT3471 datasheet. L2 and L3 are linked somehow (two inductors in one shielded package?), and I can't find a datasheet for the specified Sumida CLS63-10. Will it affect the function of the circuit if I use two separate shielded inductors for L2 and L3? If not, could you suggest a different suitable part / parametric tool to find one.

author: station240
author_rank: Unknown
timestamp: February 24, 2016, 06:46:59 pm
content: An alternative part would be coiltronics drq127-100Some other LT DC-DC converters use this series of coiltronics parts, so it should be ok.Yes you could use two separate inductors, it lowers the efficiency.

author: microbug
author_rank: Frequent Contributor
timestamp: February 24, 2016, 06:57:14 pm
content: Great, thanks!
What is this inductor/ferrite component? - Page 1
Forum section: electronics / projects

author: Bas
author_rank: Newbie
timestamp: August 28, 2017, 03:30:52 pm
content: There are four equivalent packages in series with the outputs of a speaker driver board, labelled L1_1 to L1_4, see attached picture. There's a label with 'CC' on top of it which is just a sticker. It looks like some noise suppression ferrites or inductors but it looks like an interesting part. Is it some sort of E-core ferrite material with the pins going in a loop around the core?Does anyone know which part this might be?

author: daqq
author_rank: Super Contributor
timestamp: August 28, 2017, 05:29:19 pm
content: Would guess it's a common mode choke.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 28, 2017, 06:10:11 pm
content: Does it look like the terminals loop up and through the core? (Kinda looks like it from here, but it's hard to tell from the pic.)If so, yeah, a two line ferrite bead, of fair amperage rating.I suppose the speaker driver in question is a class D amplifier?Tim

author: SeanB
author_rank: Super Contributor
timestamp: August 28, 2017, 06:20:40 pm
content: Just a common mode choke, to reduce the EMI from the class D amplifier from being radiated by the speaker wiring acting as an antenna.

author: Bas
author_rank: Newbie
timestamp: August 28, 2017, 06:40:20 pm
content: Quote from: daqq on August 28, 2017, 05:29:19 pmQuote from: T3sl4co1l on August 28, 2017, 06:10:11 pmQuote from: SeanB on August 28, 2017, 06:20:40 pmYes, it looks like it loops up and goes around the core. It is a class D amp so I guess a common mode choke / ferrite it is. Thanks everyone!
what is this inverting p-type fet symbol, and how to realize in ltspice? - Page 1
Forum section: electronics / projects

author: julian1
author_rank: Frequent Contributor
timestamp: October 23, 2022, 09:18:53 am
content: From here, the high-side flip/flop pfet symbol?https://www.researchgate.net/figure/Unidirectional-cross-couple-CMOS-level-shifters_fig4_316275906Edit; Maybe depletion mode?

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: October 23, 2022, 09:48:55 am
content: It's a thing with IC design where for some reason every man and their dog use a different symbol for FETs. Those are just plain old PFets, with the bulk connected to source.

author: julian1
author_rank: Frequent Contributor
timestamp: October 23, 2022, 11:02:51 am
content: Thanks the cmos arrows are also reversed, indicating current direction I think. For the ltspice, there was a dumb unconnected node, which prevented simulation. The amended version works as expected.

author: TheUnnamedNewbie
author_rank: Super Contributor
timestamp: October 23, 2022, 11:15:42 am
content: The arrows are reversed not necessarily to indicate current direction, I believe rather to be 'similar' to NPN/PNP transistors.
What is this LiPo battery connector model? - Page 1
Forum section: electronics / projects

author: Nikos A.
author_rank: Regular Contributor
timestamp: November 09, 2021, 10:11:18 pm
content: Hi guys, can you help me recognize the connector type of the 361-00086-10 battery?This battery is for Garmin 735xt smartwatch.Also any suggestion for crimping tool for that type?

author: thm_w
author_rank: Super Contributor
timestamp: November 09, 2021, 10:36:39 pm
content: Photo would help.But they have replacement cells on aliexpress. I wouldn't bother with crimping, reuse the existing leads if you can.https://www.aliexpress.com/item/1005002318058965.htmlhttps://store.batteryspecialists.com/watcsgrf225sh.html

author: Nikos A.
author_rank: Regular Contributor
timestamp: November 10, 2021, 12:17:30 pm
content: I intend to buy a new one, but I want to confirm that this is a battery-related issue. Yes, I can re-use the existing connector and solder it on the new battery. Thanks for the advice!!

author: Nikos A.
author_rank: Regular Contributor
timestamp: November 24, 2021, 10:28:39 am
content: I will order some LiPo batteries and I want to provide the connector type model to the manufacture in order to applied during assembly. This is the connector type and socket I want. Does anyone know this connector-type model?

author: Nikos A.
author_rank: Regular Contributor
timestamp: November 24, 2021, 01:15:07 pm
content: I think I found ithttps://www.lipolbattery.com/li-po-battery-connectors.htmlProbably is the ACHR-02V-S
What is this mystery chip? - Page 1
Forum section: electronics / projects

author: technix
author_rank: Super Contributor
timestamp: November 17, 2016, 02:34:55 pm
content: This chip is given to me by my friend from the parts collection of his late grandpa. This is an unmarked chip in CERDIP-18 package. I don't have a microscope so this is the best I can do with the close shot mode on my camera, a Nikon Coolpix S630.There are another two mystery PDIP-14 packages with green composition and gold-plated pins, with the marking 5G0362.He also gave me some 1986-vintage F004B op amps in TO-99 metal can package, 1982 vintage 3DG12C NPN transistors in TO-5 metal can package, 1986 vintage 3DG053 NPN transistors and 2CW114J Zener diodes, and a Zener diode 2CW21B made in October 1976.

author: richard.cs
author_rank: Super Contributor
timestamp: November 17, 2016, 02:53:58 pm
content: Given that there's a window and a large-area die with a lot of regular structure I would guess it's some kind of EPROM.

author: technix
author_rank: Super Contributor
timestamp: November 17, 2016, 02:59:34 pm
content: Quote from: richard.cs on November 17, 2016, 02:53:58 pmThat is not a window - I took the metal cap off to take this die shot.

author: bktemp
author_rank: Super Contributor
timestamp: November 17, 2016, 03:13:20 pm
content: It still looks like some memory or some other LUT or logic array. You can clearly see a 8x8 structure, and on the top and left side are probably adress decoder and readout (and maybe write) logic.It looks like it has been assembled by hand (die is mounted off centre and the gold paint looks uneven).

author: free_electron
author_rank: Super Contributor
timestamp: November 17, 2016, 03:20:10 pm
content: looks like an early PAL or GAL. Too small to be eeprom.these are prototype devices, hand assembled.

author: technix
author_rank: Super Contributor
timestamp: November 17, 2016, 04:15:39 pm
content: Then how do I figure out its pinout and test it?
What is this old (1982 vintage) chip - Page 1
Forum section: electronics / projects

author: skua47
author_rank: Newbie
timestamp: March 06, 2019, 11:33:03 pm
content: I can't find anything on this chip. Looks pretty fancy with all the gold coating but nothing comes up on the name. I can't find the logo either. Any help would be greatCeramic package, 18 pins.ThanksDavid

author: Wimberleytech
author_rank: Super Contributor
timestamp: March 07, 2019, 12:20:06 am
content: Hmm...that is a challenge. Wafer foundries existed back then, so that any podunk company could make a chip and brand it. This feels like one of those examples. I have done some looking and will continue. Pop the lid and see what is inside.

author: Silver_Pharaoh
author_rank: Contributor
timestamp: March 07, 2019, 12:24:31 am
content: Hmmm I'm curious too!

author: Circlotron
author_rank: Super Contributor
timestamp: March 07, 2019, 12:31:10 am
content: What’s it out of?

author: coromonadalix
author_rank: Super Contributor
timestamp: March 07, 2019, 01:04:13 am
content: more photos please dip how many pins

author: gamalot
author_rank: Super Contributor
timestamp: March 07, 2019, 01:04:39 am
content: Hybrid Systems HS2020 ?https://cdn.datasheetspdf.com/pdf-down/H/S/2/HS2020_HybridSystems.pdf

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 07, 2019, 01:08:30 am
content: That could very well be a custom chip, so obviously knowing what kind of device it was in would help.It's not necessarily a single chip either. It could be some kind of hybrid containing several parts. That was common practice back then.Opening it may not be trivial as it kind of looks like the lid was laser-welded. Maybe with a Dremel, a diamond cutting disc and a lot of patience and care.

author: dave3533
author_rank: Contributor
timestamp: March 07, 2019, 01:21:19 am
content: Does it have pins or just that white wire?

author: tsman
author_rank: Frequent Contributor
timestamp: March 07, 2019, 01:31:26 am
content: Quote from: gamalot on March 07, 2019, 01:04:39 amLooks like you've found it. TheHybrid Systemslogo matches the original photo as well.

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 07, 2019, 01:35:46 am
content: @gamalot: good catch! And it was indeed an hybrid. But now there is no need for a Dremel(unless the OP nicely wants to crack it open and post some photos)

author: Wimberleytech
author_rank: Super Contributor
timestamp: March 07, 2019, 01:41:44 am
content: Quote from: gamalot on March 07, 2019, 01:04:39 amNice work...I bet that is it!

author: skua47
author_rank: Newbie
timestamp: March 07, 2019, 05:30:54 am
content: That's fantastic. I was thinking Sipex but the logo didn't match. Thank you gamalot and everyone.I am going to breadboard a test circuit to see if it still works.I can't remember where I found it. It was in some old lab equipment most likely that was being disposed. Maybe an old mass spectrometer.Thanks again
what is this old amplifier? - Page 1
Forum section: electronics / projects

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: October 14, 2019, 06:30:37 pm
content: so I found this listing for a 1000w amplifier, is this like a usable amplifier because it's listed for 50eur and I was wondering if it would be usable for computer speakers\the brand is labeled as 'Tesla J' the title says that it was a used 'Czechoslovak Product Broadcast Amplifier.and also the seller can't verify that it's working.here is the listing because I couldn't attach all the images from the listing!https://www.ss.com/msg/lv/electronics/audio-video-dvd-sat/audio/amplifiers/bkeig.html

author: calexanian
author_rank: Super Contributor
timestamp: October 14, 2019, 06:36:22 pm
content: Tesla (Or Teslovak) was the preseason to the current JJ tube company. They produced many electronic and appliance goods. Kind of the GE or RCA of the area. No telling what that might have been used for! Probably some kind of industrial or commercial use.

author: 001
author_rank: Super Contributor
timestamp: October 14, 2019, 06:36:29 pm
content: Quote from: ELS122 on October 14, 2019, 06:30:37 pmLooks like bitkoin maining station

author: madires
author_rank: Super Contributor
timestamp: October 14, 2019, 06:47:45 pm
content: Maybe a 100V PA amp?

author: Gyro
author_rank: Super Contributor
timestamp: October 14, 2019, 06:48:56 pm
content: It looks like some kind of multi channel (or at least paralleled) noisy fan cooled public address amplifier with awkward connectors and difficult repairability. It looks very risky.For your 50eur, you would be much safer finding a working consumer stereo amplifier from ebay or local sale sites to drive your PC speakers. You might even find a modest new one for that price.

author: jaromir
author_rank: Unknown
timestamp: October 14, 2019, 07:15:13 pm
content: This is oldTeslaamplifier, probably 40 years old, and has nothing to do with JJ, which was born on Tesla ashes after political changes in 1989. Funny coincidence some of audio gear were made within a stone's throw from where I'm typing this right now.I'm not sure about the particular piece - it looks familiar, but I can't recognize this 6-channel variant. Cyrillic on Tesla gear is unusual too.In my teens I enjoyed my share of repairing Tesla audio gear from former Czechoslovakia. I wouldn't touch it with 3,048m long pole again. My experience says that electrolytics will be dried out, connectors rusty, switches too, power cable is probably lost and unavailable in your country. PCBs made on cheap phenollic base and probably covered by conformal coating that is hard to solder through and smells absolutely horrific. As I'm typing this, I can still remember that stinch after decade or two. Random resistors may be dead and chassis seems to remember better days too.50E is way too much, you'll need some more money to turn it into reasonable amplifier, so for PC speakers you better buy something else.
What is this part 17975? - Page 1
Forum section: electronics / projects

author: paul23
author_rank: Regular Contributor
timestamp: March 08, 2013, 10:07:47 am
content: I was given a 2 year old Sony TV that doesn´t work. There is a picture but there is loads of ghosting behind the image. For the record I am not bothered if I fix the TV or not, I just want to find the fault for a learning experience, although if I did fix It would be nice.It had been to a TV repair guy and her said the LCD panel needed to be replaced. I´ve looked an there is an extra PCB attached directly to the LCD that is not mentioned in the service manual, so I have started looking on there. I have found a part which looks as though it has a hole in it, but I have no idea what it is. There is also a 0603 capacitor near by which measures 1ohm 0VDC and does not change in resistance, so that is suspect as well.I have googled the part, but the only number on the chip is 17974 H044, the 0 might be a 9 as that is where the hole is. There are no other markings at all and I can´t find anything useful on Google. So If anyone knows what the part is I would be most grateful. It is the part marked ICV1 on the image.Thanks

author: amspire
author_rank: Super Contributor
timestamp: March 08, 2013, 11:07:04 am
content: Have you looked for the service manual for the TV?

author: amyk
author_rank: Super Contributor
timestamp: March 08, 2013, 11:10:11 am
content: Googling the part# on that board we find references to MAX9694 and MAX17122.Thus it may be a MAX1797(4/5), some custom part they made for Sony. The package looks like uMAX/10. But it is definitely power related.

author: paul23
author_rank: Regular Contributor
timestamp: March 08, 2013, 02:19:01 pm
content: Quote from: amspire on March 08, 2013, 11:07:04 amYep. This board is not in the service manual, it just classes it as LCD panel and that´s all the information it gives.Quote from: amyk on March 08, 2013, 11:10:11 amCorrect, both those MAX chips are on the board, but they are not around the same area is this chip. I think most of the power stuff is done on the right side of the board as that is where the MAX17122 is plus another MAX17121E (i think from memory) plus loads of caps and inductors, so I figured that was the area that was dealing with the various voltages. This section I have a feeling may be some kind of filtering part. I might be wrong, just a hunch. I will check out the MAX1795 and see if the pinouts match. Thanks.