hybridfree/eevblog-posts huggingface dataset:
Help finding front panel light pipe for pcb LED  - Page 1
Forum section: electronics / projects

author: Tegra
author_rank: Newbie
timestamp: September 06, 2019, 05:50:50 pm
content: Hello:I would like use plastic to direct the light from a LED on a pcb to a panel 1-2cm in front of it.I see this done in many products, but was hoping there may be a readily available molded insert that might fit into a hole in the panel and then be trimmed to length to just touch the LED.No sure if I am explaining this correctly?Was thinking of just some acrylic rod that could be inserted into a hole drilled in the panel, but thought it would look better to have a dome appearance on the front panel.Not sure if this could be 3d printed?ThanksTom

author: Tegra
author_rank: Newbie
timestamp: September 06, 2019, 06:20:45 pm
content: Ok, I have embarrassed myself!I tried the obvious, searched Digikey for light pipe and found no less that 4000 items.Sorry, for the trouble.Tom
Help finding gigabit ethernet switch ICs - Page 1
Forum section: electronics / projects

author: DaveW
author_rank: Frequent Contributor
timestamp: January 06, 2017, 01:38:22 pm
content: Hi,I'm wondering if anyone has come across any good gigabit switch ICs with 5+ ports, preferably something that can run without an MCU having to perform any setup. The usual suspects of Micrel, now Microchip and others don't seem to offer any gigbit performance ICs. I have found some from Realtek, Microsemi and Broadcom, but I'm reluctant to use the latter as this is a low volume commercial project, so I can't imagine I'll get much enthusiasm from them to support it and without that looks pretty hard to get hold of any. The Microsemi unmanaged switches all seem to be in the sample stage, although maybe the "lightly managed" variants might be suitable. Does anyone have any experience of dealing with Realtek, Microsemi switches or know of any better suppliers?Thanks for your help!Dave

author: AndyC_772
author_rank: Super Contributor
timestamp: January 06, 2017, 07:39:18 pm
content: I'm a bit rusty on this, but IIRC in the UK, Future Electronics are a rep for Realtek, which makes getting hold of parts and data much easier than you might expect.Another vendor worth looking into would be Marvell for a Gbit switch chip.

author: DaveW
author_rank: Frequent Contributor
timestamp: January 09, 2017, 10:22:09 am
content: Thanks Andy, I've spoken to Future and looks like I should be able to get hold of everything. Really appreciated!
Help finding National Semiconductor crystal oscillator and oven application - Page 1
Forum section: electronics / projects

author: 5065AGuru
author_rank: Frequent Contributor
timestamp: October 21, 2019, 10:36:24 pm
content: Hi, I need help finding an application note that was in an old National Semiconductor Linear (I believe)data book. This was (I think)using an LM195/395 transistor. I remember it was a complete diagram of the oven controller and also included the crystal oscillator portion. It had some details on the construction of the oven mass and thermal sensor connection. I have found in my searches several oven designs but can't find the one that also included the crystal oscillator. If anyone can point me to the right place it would be appreciated!Cheers,Corby Dawson

author: ArthurDent
author_rank: Super Contributor
timestamp: October 22, 2019, 01:53:12 am
content: I don't think this is what you're looking for but I figured I'd post it anyway.

author: 5065AGuru
author_rank: Frequent Contributor
timestamp: October 22, 2019, 04:24:05 am
content: Arthur,That's not the one but it does have some interesting ideas.Thanks,Corby

author: LKM
author_rank: Newbie
timestamp: November 12, 2019, 08:46:19 pm
content: Hi Corby,Could it have been a Jim Williams app note? He tends to include some details on construction although a little light in the national days.Here's one:https://www.analog.com/media/en/technical-documentation/application-notes/an12fa.pdfAnd there are some more ideas including the use of the LM395 as the heater driver here, flip to page 148 or so:https://archive.org/details/LinearCircuits-ADesignersGuideToInnovativeLinearCircuits-JimWilliams1985OCR/page/n147Cheers

author: LaserSteve
author_rank: Super Contributor
timestamp: November 13, 2019, 10:36:39 pm
content: I used to know where my copy of the book you refer to is at. However after remodeling the house much has been removed. I'll see if I can find it.It is in an older collection book of Nat Semi app-notes, very old... Blue with orange trim on the cover... Not many of them would be around due to the grade of paper they are printed on, which is not much better then newsprint. I bought it at a hamfest as a child. I used to wonder what the big deal about that circuit was. Now after learning about volt-nuts decades later, I know.No promises, but I'll try.Steve

author: 5065AGuru
author_rank: Frequent Contributor
timestamp: November 14, 2019, 06:38:26 am
content: LKM,Thanks! The first one looks to be very close! The one I was remembering, I think, had a drawing of the oven assembly.Cheers,Corby
Help finding part numbers for the following chips - Page 1
Forum section: electronics / projects

author: buffalo_den
author_rank: Newbie
timestamp: November 30, 2019, 02:40:57 pm
content: Hi there wondering if anyone will be able to help me identify the part numbers for the following chips?First one:S862ABT54BSecond:66FJSVUBThird:LCXF6531Cheers for your help

author: Wimberleytech
author_rank: Super Contributor
timestamp: November 30, 2019, 03:51:06 pm
content: Quote from: buffalo_den on November 30, 2019, 02:40:57 pmCan you give context? Are these on a fuel controller for a Titan III rocket or the sound controller for a Chatty Kathy doll...or something else?

author: coromonadalix
author_rank: Super Contributor
timestamp: November 30, 2019, 07:29:54 pm
content: you're photos are crap if i may saythe first seems to be an transistor, but i think a mosfet in this caseAnd yes as other wrote, knowing more details would / could help
Help finding replacement diodes - Page 1
Forum section: electronics / projects

author: buffalo_den
author_rank: Newbie
timestamp: February 11, 2019, 04:57:15 pm
content: Hi guys, I am trying to reverse engineer a 24v DC hot swap, the item is designed to keep a camera running whilst batteries can be changed, it there for has two 24v inputs and one 24v output. There are a few SMC diodes on the board which I am trying to find data sheets for but am failing, just wondering if anyone could help point me into the right direction? Attached is two photos of the different diodesThanks for any help you might be able to provide

author: tsman
author_rank: Frequent Contributor
timestamp: February 11, 2019, 05:02:49 pm
content: The ]:: logo is Diodes Inc.First is aSMAT70A.Second is aSBR2U150SA.
Help finding the right size pogo pins - Page 1
Forum section: electronics / projects

author: Hootis Tigglebits
author_rank: Contributor
timestamp: January 29, 2024, 06:23:22 pm
content: I have a test jig with 295mil initial height and 98mil compressed height pogo pins that are too small in diameter for the DUT. When I test a board, I sit it on top of the jig and screw it down. The pogo pins on the test jig need to be slightly larger in diameter to make contact with the bottom side of the vias which are 59mil in diameter and has exposed copper at 85mil in diameter, and I only need to make contact with the vias labeled C and A in the picture below. I'm having trouble finding a suitable pogo pin for this and was wondering if anyone could help? It doesn't have to be the same initial and compressed heights as the ones I'm using now since I can make adjustments for that. The ball type pins will not work and through hole is preferred but surface mount will work too.

author: ajb
author_rank: Super Contributor
timestamp: January 29, 2024, 10:43:17 pm
content: Smiths Interconnect S-2 series includes 0.075"∅ cone and chisel tips, example:https://www.mouser.com/ProductDetail/Smiths-Interconnect-IDI/S-2-K-2-G?qs=RyxGbzdOlW%252BJNnDMJCjWjg%3D%3DThey have several other larger/smaller series that may be worth looking at, but the smaller series generally have 0.060" tips, which might risk getting stuck in a 0.059" hole, depending on tolerances/surface finish. The larger series (AFAIK) tend to be much longer as well as larger diameter.

author: Terry Bites
author_rank: Super Contributor
timestamp: January 30, 2024, 04:48:57 pm
content: Have a look at this selectorhttps://isipkg.com/solutions/connector-technologies/pogo-pin-catalog/
Help finding this NEMA 1 enclosure - Page 1
Forum section: electronics / projects

author: iXod
author_rank: Frequent Contributor
timestamp: September 22, 2017, 11:58:52 pm
content: No not just any enclosure. This one has a polycarb window on the front:https://imgur.com/a/QS49BOtherwise it's just a bog-standard indoor NEMA 1 box. The front cover lifts off (with a simple release at the bottom)--no screws or such.The label in the photo is on the inside of the cover which may be listed as an accessory cover, don't know.It's difficult to find a GE distributor in the US that carry small enclosures. Most carry distribution switchgear stuff.Any help locating something equivalent that isn't a NEMA5000would be greatly appreciated.Thanks.

author: dave_k
author_rank: Frequent Contributor
timestamp: September 23, 2017, 12:27:00 am
content: That looks like someone just cut a hole in the lid, and attached the clear window with screws.

author: forrestc
author_rank: Unknown
timestamp: September 23, 2017, 12:39:11 am
content: Quote from: iXod on September 22, 2017, 11:58:52 pmI agree with dave_k, looks like a standard CLXE1A enclosure with a field-made hole cut in it. Based on pictures I've found of the CLXE1A enclosure online, it appears that the clear plastic is even held on via field-added screws.The givaways are: The rough, uneven cut of the hole, the pencil markings for the centers of the bolt holes, and the choice of fasteners to hold the plastic into the enclosure. A stock enclosure would have not such a rough cut, The fasteners would likely be stamped in at the factory (i.e. bolt in metal part, nuts on the inside), etc.I could point you toward various enclosures with windows in them though if you need.... what size/type/etc?

author: iXod
author_rank: Frequent Contributor
timestamp: September 23, 2017, 01:00:54 am
content: Thanks guys. I'll look at duplicating this one.Cheers.
Help fixing a 1960s Wang calculator console - Page 1
Forum section: electronics / projects

author: rea5245
author_rank: Frequent Contributor
timestamp: May 26, 2021, 12:36:39 am
content: Hi,I have a Wang 360K calculator console that I need help fixing. It's a dumb keyboard and Nixie display that was normally connected to a central "Electronic Package" where the calculations were done. The display used to work, but broke in the last few days. I have a test rig that drives the display board, so I've eliminated the Electronic Package from the equation: I know the problem is on the display board, not in the EP.The symptom is that every other Nixie tube does not work. The Nixies are multiplexed and in the schematic below, the Nixie anodes are selected by the signals T1, T2, T4, T8, and their inverses. The Nixies that work are driven by ~T1 (odd numbered codes in the schematic) and the Nixies that do not work are driven by T1 (even numbered codes). My problem is that I can't figure out what could fail in order to cause this behavior.It uses diode-transistor logic and three voltage levels, so I'm having trouble wrapping my brain around it. But I understand a bit. For starters, -11V is logic 1, 0V is logic 0, and +11V is just used to pull up the voltage on the PNP transistors' bases.Since the ~T1 Nixies work, T1 must be coming onto the display board OK and being inverted OK. The ~T1 Nixies turn on when they're supposed to and turn off when they're supposed to.The T1 Nixies never turn on. I don't know what could fail to cause this behavior. If the T1 trace was broken before it got to any of the Nixies, then the positive sides of the diodes would be floating. For an anode-driving transistor (e.g. t13) to be on, all the diodes need to be off. If a diode's positive side is floating, won't that diode be off? And then, wouldn't the T1 Nixies work? I would think a broken T1 trace would mean the Nixies turn on when they're not supposed to; not that they're always off.OTOH, if T1 were somehow shorted to 0V, that would, indeed, cause the T1 Nixies to never come on, but it would force ~T1 to -11V. And then the ~T1 Nixies would never turn off. But they don't have that problem.I'd appreciate any insights.Thank you,Bob

author: jmelson
author_rank: Super Contributor
timestamp: May 26, 2021, 12:55:46 am
content: Not shown on your drawing, but the circuit that generates T1 and T1/ is not working properly. That is thelowest-order bit of the Nixie select counter.Jon

author: rea5245
author_rank: Frequent Contributor
timestamp: May 26, 2021, 01:03:54 am
content: Quote from: jmelson on May 26, 2021, 12:55:46 amThe inverter circuit is shown at the bottom of the schematic.T1 is not generated; it comes in from an edge connector.If the circuit that generates ~T1 wasn't working, wouldn't the Nixies driven by ~T1 misbehave? But they're the ones working correctly.- Bob

author: amyk
author_rank: Super Contributor
timestamp: May 26, 2021, 03:50:32 am
content: Without seeing the board and how it's wired, we can only guess. It could be a brokenandshorted trace. My approach would be to check the signals with a scope and follow them everywhere they should go.
Help Hacking LCD - Page 1
Forum section: electronics / projects

author: Q2DM1
author_rank: Newbie
timestamp: February 11, 2016, 04:22:50 am
content: I recently watched the EEVblog video about hacking the VFD and it "inspired" me to hack my own. I actually have three displays that I pulled out of various devices (one of them is a VFD) and they all have the driver chips on the same board. This is a good start on all of them. Let's just focus on one of them for now. I think I pulled it out of a VCR or something like that.The PCB is about 1.5 times the length of the LCD itself and just about the same width. It has "JK1165" and "LMKM-P3X" on the silkscreen. The second one returns a result in Google, but they are unrelated to the board (or at least not directly). However, I did find a datasheet to the driver chip, which is a BU9716K. The datasheet I found actually lists both the BU9716BK and BU9716BKV, the BK is the closest match to the one on my board.(datasheet)My next step was also easy... sorta. The PCB has two connectors on it so I needed to figure out which pins connected where on the chip. Both connectors have six pins. I made a list (table, really) of both connectors like if I were to hold the entire board in proper viewing position and probed with my DMM to see what pin on the chip went where with the datasheet open for reference. This is what I came up with:123456123456CSCLKDin?(probably the IR receiver output)??VddVss???how do i give tables a border?This is as far as I have made it. Page six of the datasheet suggests that the driver chip will receive 12 bytes of display data followed by one byte of control data. The control byte looks easy enough to be able to figure out via testing; it relies on three bits, one of which is simple to understand. The other two bits are a tad confusing. It's the twelve data bytes that are going to give me problems.It will be tomorrow (it's about 11:20 PM) before I can do any more research on it. There was something else I was going to say, but it escapes me.

author: Q2DM1
author_rank: Newbie
timestamp: February 11, 2016, 02:32:25 pm
content: I've done some more visual inspection and here is what I came up with for the connectors.123456123456CSCLKDinBacklight - (?), ?IR OutNCNCVDDVSSBacklight + (?), ?NCPushbutton(?)It looks to me like the backlight + and - connections do other things too, but I am unsure of what. Also the very last connection terminates at one side of a resistor. The resistor continues on to a pushbutton and several other things including the driver chip. So perhaps instead of being a button output, it's a pullup or pulldown connection?
Help ID cap manufacturer - Page 1
Forum section: electronics / projects

author: Bud
author_rank: Super Contributor
timestamp: June 02, 2015, 04:24:21 am
content: Anyone can recognize the oval manufacturer logo on the electrolytic capacitors ?thks!

author: mariush
author_rank: Super Contributor
timestamp: June 02, 2015, 06:25:35 am
content: Logo belongs to Nichicon

author: helius
author_rank: Super Contributor
timestamp: June 02, 2015, 07:08:44 am
content: Yes, Nichicon. Some of their series are not marked with the series code, as seen here.http://www.nichicon.co.jp/english/products/pdfs/e-wt.pdf

author: tautech
author_rank: Super Contributor
timestamp: June 02, 2015, 07:31:12 am
content: Quote from: mariush on June 02, 2015, 06:25:35 am+1

author: Bud
author_rank: Super Contributor
timestamp: June 02, 2015, 04:57:08 pm
content: Thanks guys !
Help ID-ing header for SOP breakout board. - Page 1
Forum section: electronics / projects

author: romhunter
author_rank: Regular Contributor
timestamp: October 03, 2020, 07:18:41 pm
content: Does anyone know what type of connector that was used in this board?This kind of breakout board is very convenient, I can just basically replace the DIP version with SOP if the need comes up.Some more description: The pins at the beginning and the end of the connector are normal straight through hole one, and the rest are smd.Datasheet:http://www.marutsu.co.jp/contents/shop/marutsu/datasheet/14P-SOD-065-300.pdfAny help is appreciate. Thank you.

author: Benta
author_rank: Super Contributor
timestamp: October 03, 2020, 08:44:38 pm
content: Easy:www.precidip.com

author: romhunter
author_rank: Regular Contributor
timestamp: October 03, 2020, 11:15:07 pm
content: Thank you. This one is single row, 2.54mm however, so I think it is custom designed. Too bad.It would be nice to have some mass produced variant.
Help ID parts from garage sale - Page 1
Forum section: electronics / projects

author: Dan Moos
author_rank: Frequent Contributor
timestamp: August 01, 2020, 08:13:03 pm
content: Just got back fro an amazing estate sale from a former tech. Walls of vintage gear, piles of parts, ect. Old Tek enthusiasts would kill me if they new some of the stuff I walked away from (huge scope on cart setups, unknown if working, under $50).I got an HP 3468a for $20, a huge fluorescent magnifying lamp for basically nothing, and TONS of components.I have a few things I need help IDing.First up, this thing (I have like 50 of them) that I think is a cap. It reads about 1 nf on the LCR meter, but was in a box marked 22K. Obviously the marking on the box is not necessarily relevant.What manner of cap is this? How do I read the dots?Here's the pic. More component pics to follow.

author: bob91343
author_rank: Super Contributor
timestamp: August 01, 2020, 10:07:40 pm
content: Looks like a capacitor to me. If they all measure nearly the same, that's what I'd assume it is.

author: Dan Moos
author_rank: Frequent Contributor
timestamp: August 01, 2020, 11:03:35 pm
content: I kinda figured its a cap.I wanna know what kind, and how to interpret the markings.

author: Renate
author_rank: Super Contributor
timestamp: August 02, 2020, 02:21:31 am
content: Well, brown-black is pretty clear and we can presume that the silver adds two zeroes.The old military micas had six dots, this is something similar/different.

author: jan48
author_rank: Newbie
timestamp: August 02, 2020, 10:19:47 am
content: This looks like an old redcap ceramic capacitor made by ERIE 1000pF
Help ID this RF 433MHz transmitter from hella key fob from PSA cars - Page 1
Forum section: electronics / projects

author: rvalente
author_rank: Frequent Contributor
timestamp: March 12, 2020, 02:11:58 am
content: Hello mates,Can anyone help me find this transmitter datasheet? I want to check if i can change the 433mhz modulation from FSK to ASK.Its from a PSA key fob, my 2011+, as the previous cars uses ASK like mine 307.

author: ve7xen
author_rank: Super Contributor
timestamp: March 12, 2020, 08:42:15 pm
content: The markings don't seem helpful. If you can get the FCC ID (probably printed on the case), and look that up, the documents might be somewhat enlightening.It's probably a purpose-specific chip without public data, though.
Help ID'ing these PCB ground lugs - Page 1
Forum section: electronics / projects

author: floobydust
author_rank: Super Contributor
timestamp: June 07, 2017, 01:54:24 am
content: I'm trying to source these PCB ring connectors/lugs used for safety grounds. Common in consumer electronics SMPS in TV, LCD monitors etc.Anyone know their proper name or where to buy?

author: stj
author_rank: Super Contributor
timestamp: June 07, 2017, 03:57:01 am
content: i think this was covered recently in a thread about using pcb spacers as high current connections.something like that.

author: stj
author_rank: Super Contributor
timestamp: June 07, 2017, 04:11:46 am
content: https://www.toby.co.uk/content/catalogue/series.aspx?id=6&Category=159

author: floobydust
author_rank: Super Contributor
timestamp: June 08, 2017, 06:38:15 am
content: The ones in the pic areKang Yang'ground terminal' GND-15 made in Taiwan; "Foxconn, Asus, Delta Power, and HP source from us". I will look for them in North America but they seem to be a mega company.stj thanks, you restored my sanity. They are hard to find.

author: ebclr
author_rank: Super Contributor
timestamp: June 08, 2017, 06:52:00 am
content: A more detailed linkhttp://www.kangyang.com/Sup_Ph.php?BD=10&NO=32
Help identifing connector - Page 1
Forum section: electronics / projects

author: CAPFX
author_rank: Newbie
timestamp: January 29, 2019, 02:56:15 am
content: I'm looking for this connector but I'm not having much luck finding it (or even what this style of connector is called). It's 2x14 and 2x5 contact positions on the same connector housing bit. Not shown in this image (I'll get better ones tomorrow) but there's a 28 pin ribbon cable on one side and 10 pin ribbon cable on the other side. They go into some sort of split ribbon cable IDC housing thing with slots for 28 cables, a space, and then slots for 10 cables. For those curious, it's on a Powerflex 523/525 drive.

author: gnif
author_rank: Unknown
timestamp: January 29, 2019, 05:07:52 am
content: It looks very much like a SATA/SAS connector that you would see on a HDD although from the picture it seems there are pins on both sides of the fingers which is inconsistent with those connectors.https://p.globalsources.com/IMAGES/PDT/B1065662480/Female-SAS-Connector-with-29-Pins.jpg

author: envisionelec
author_rank: Frequent Contributor
timestamp: January 29, 2019, 05:42:20 pm
content: It’s known as a MICTOR connector.
help identifing this connector - Page 1
Forum section: electronics / projects

author: Boschi
author_rank: Regular Contributor
timestamp: April 13, 2019, 03:22:42 pm
content: so, i bought a used car and i want to change the stock radio, i open up everything and its not the standard iso connectorif anyone is able to found the pinout even better, but as now im mainly intrested in buying another connector in order to create an adapter to an iso connector (which is the standard/most common one).it has 15 pin and the whole thing is 42mm wide. the pitch is 2.54mm.cheers

author: 6PTsocket
author_rank: Regular Contributor
timestamp: April 13, 2019, 05:06:09 pm
content: Contact Crutchfield. They specialize in after market radios and the hardware, bezels and adapter cables. It it exists they will have it Phone: 1 844 221 6900.They have an extensive stock of adapter wiringSent from my SM-G900V using Tapatalk

author: DaJMasta
author_rank: Super Contributor
timestamp: April 13, 2019, 06:00:08 pm
content: If the pitch is 2.54mm, making an unkeyed replacement for your own adapter should be simple, that's a standard header pitch. If you really want it keyed or to fit properly widthwise, it's more complicated, but if you want a good electrical connection that you can just heatshrink over or something and not expect it to need to come off any time soon.... it's an easy one to make.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 13, 2019, 07:28:22 pm
content: seems to be a peugot connector ??you could take 16 pins dupont connectors, snip 1 pin, and do your own connector ?? or any 2.54mm headers with solderable pins ??you have some kits with males and female pins for very cheap prices on Ebay, search dupont connectors kits, i dont see kits with 16 pins single row ?https://www.ebay.com/itm/620PCS-Dupont-Wire-Jumper-Pin-Header-Connector-Housing-Assortment-Kit-Crimp-Pin/122676021413?Or maybe go at a scrap yard trying to find your car and snip the connector, done that many times.On the first photo, it seem maybe, i say maybe with a very fine needle you could unsnap the black connector from the green housing, try to see in the slot if you have a retaining clip / pin ??I could do it on my suzuki connectors, remade an iso to suzuki connector, in case i put my gps 2 din radio in another car.

author: Bratster
author_rank: Frequent Contributor
timestamp: April 13, 2019, 07:31:57 pm
content: Have you already done a search for radio adapter and your make model year of car?That'd be what I would start, unless you have some crazy car that hasn't sold very many somebody will have an adapter already.Sent from my Pixel 2 XL using Tapatalk

author: tsman
author_rank: Frequent Contributor
timestamp: April 13, 2019, 07:36:32 pm
content: What model stereo is that? What car is it in?
Help identifiy component - Page 1
Forum section: electronics / projects

author: Hornnumb2
author_rank: Regular Contributor
timestamp: December 31, 2019, 09:02:35 pm
content: I have this out of a GM digital a/c head that controls the temperature. it has no stops built in and I dont see any numbers. What do I need to look for? I can get some more detailed pics under the microscope if needed. It has 3 legs on one side and 2 on the other with 2 ground tabs in the middle. Thanks Michael

author: DuPe
author_rank: Regular Contributor
timestamp: December 31, 2019, 09:11:30 pm
content: looks like a rotary encoder e.g.https://www.adafruit.com/product/377orhttps://www.digikey.de/product-detail/de/panasonic-electronic-components/EVE-QDBRG516B/P12422-ND/637159cherspeter

author: Hornnumb2
author_rank: Regular Contributor
timestamp: December 31, 2019, 09:40:15 pm
content: Thanks so much just ordered through Mouser. Michael

author: DuPe
author_rank: Regular Contributor
timestamp: December 31, 2019, 09:44:41 pm
content: welcome

author: Hornnumb2
author_rank: Regular Contributor
timestamp: January 07, 2020, 03:36:30 am
content: Well ordered the wrong one, it’s is a 18 detent and has 3 pins on one side and 2 on the other with 2 ground pins. How do I narrow my search or what’s the best way to look it up. Do I search for a certain package type or pin type? Totally lost. If I just put rotary encoder, I get 2500 results. Thanks
Help Identify a PCB socket  - Page 1
Forum section: electronics / projects

author: abqa
author_rank: Newbie
timestamp: March 18, 2019, 11:11:51 am
content: Hi GuysI need help identifying a 5pin socket on a PCB in a heatpump so I can find a matching connector for it. It looks to have a pitch of 2mmI suspect it is a molex or similar but can't find any that look the same.I had some 5pin JST PH connectors laying around which are the right length but too wide to fit in.I was wonderign if someone recognises this connected (See attached image)

author: RES
author_rank: Regular Contributor
timestamp: March 18, 2019, 12:47:05 pm
content: Looks like a PAP-05V / PAP-05V-S 2mm pitch 5 PIN PA JST connector.

author: abqa
author_rank: Newbie
timestamp: March 18, 2019, 08:51:57 pm
content: Thanks that looks like it could be correct! I thought I had checked all the JST connectorsI will order some and check
Help identify component on GSM Power Board. - Page 1
Forum section: electronics / projects

author: Wilksey
author_rank: Super Contributor
timestamp: August 17, 2021, 03:07:33 pm
content: Hi,Does anybody know what this device is on the PCB, the one with half white half black 'IC', it has 8 pins and has "22734" stamped on the side of it.From what I can tell the entire left hand side of the IC goes nowhere, and the 4 pins on the right, from the top are: VCC, MCU, MCU, GND.I thought it might be some kind of temp sensor but it has an input for one already on the board.The 2 middle VIAs go off to the MCU, nothing else marked anywhere, it is a GSM power control unit FYI.

author: Wilksey
author_rank: Super Contributor
timestamp: August 23, 2021, 10:39:45 pm
content: Nobody?

author: drvtech
author_rank: Regular Contributor
timestamp: August 23, 2021, 11:26:27 pm
content: A picture from a slightly oblique angle would help. Can't get any depth perception from that angle. Is the white bit soft or hard, and is it peeling away in the corner?

author: Wilksey
author_rank: Super Contributor
timestamp: September 21, 2021, 10:32:17 am
content: It looks like it might peel off but I haven't tried as I don't know what it is.It looks like it is stuck on as it dips slightly in the middle of the white bit.

author: Fraser
author_rank: Super Contributor
timestamp: September 21, 2021, 12:11:44 pm
content: My first thoughts were the following….1. Infrared proximity detector that uses collocated IR emitter and detector to detect a reflective surface over it.2. IRDA communications link for bi-directional data communications. One side is the IR emitter and the other is the receiver.The second possibility seems more likely in a GSM power controller than than the first unless used as a safety cover interlock.Try applying power to the board and checking fro IR emissions from the component using a digital camera.

author: Wilksey
author_rank: Super Contributor
timestamp: September 21, 2021, 01:54:50 pm
content: Thanks Fraser, i'll dig it back out and see if it emits IR.The board itself comes as you see it, no enclosure, and works "on the bench" so I don't know what an IR would be doing, worth checking though.

author: Fraser
author_rank: Super Contributor
timestamp: September 21, 2021, 02:07:46 pm
content: IR data links are sometimes used as a safe, isolated way to communicate with the systems processor. This can be for interaction with the processor or firmware updates. The same idea is used on some multimeters for safe computer connection.Fraser

author: Wilksey
author_rank: Super Contributor
timestamp: September 22, 2021, 01:42:50 pm
content: Thanks, the MCU is a PIC16 or 18 I believe.
Help identify LCD Display - Page 1
Forum section: electronics / projects

author: NivagSwerdna
author_rank: Super Contributor
timestamp: August 14, 2018, 09:01:05 pm
content: Can someone identify this rather nice display found on a name badge?It is a 128x64 LCD producing black squaresThe glass is about 55mm wide, 35mm tall (the actual display region being a bit smaller)There is strange slightly tactile strip along the bottom of the glass and a 28 pin flexible cable.Any ideas?

author: Gyro
author_rank: Super Contributor
timestamp: August 14, 2018, 09:21:22 pm
content: Sorry, can't help with the actual identification but that slightly tactile strip at the bottom is covering the Chip on glass driver and its connections. Don't tact

author: mariush
author_rank: Super Contributor
timestamp: August 14, 2018, 09:48:11 pm
content: Look at a distributor like Digikey and select same pixel count and similar sizes and look at the connectors.28 give or take a couple of pins should give you lots of displays. Majority will probably use the same chips on the back (and some clones of well known chips, or chips with same commands as older known chips) so the order of the pins is usually similar on a lot of displays.if you open datasheets of various displays (especially those made by newhaven), you'll find the chip (or chip clone) they use mentioned in the pdf and even links to documentation of original chip on their website and sample code.Here's a link to start with :lcd displays with 128x64 pixels and around 55x35mm sizeThis display is 128x64 and has 28 wires in the connector, may be similar to your display:https://www.digikey.com/product-detail/en/displaytech/64128KX-FC-BW-3/1756-1039-ND/6650333

author: ataradov
author_rank: Super Contributor
timestamp: August 14, 2018, 09:49:37 pm
content: It would be hard to identify the exact display, unless someone just knows it.But here is one that is close:https://www.buydisplay.com/default/2-1-inch-cog-serial-spi-128x64-graphic-lcd-display-module-arduino-black-on-whiteLook around for other color combinations. BuyDisplay is a good source for information on things you can actually buy.

author: NivagSwerdna
author_rank: Super Contributor
timestamp: August 15, 2018, 10:01:05 am
content: Thanks very much for your help so far... I did wonder about whether it had an embedded controller and I was not aware of "COG" as a search term so that has helped hugely.Is the screen size measured along the diagonal and in inches like TVs? So this is a 2.1" display?Also... ST7565R seems to be a popular option. Need to trace some wires.

author: ataradov
author_rank: Super Contributor
timestamp: August 15, 2018, 04:46:27 pm
content: Quote from: NivagSwerdna on August 15, 2018, 10:01:05 amCorrect.Quote from: NivagSwerdna on August 15, 2018, 10:01:05 amBut pinout on the connector may not be standard.Should not badges be open source so you could hack them?
Help identify manufacturer / product line for Chinese connector - Page 1
Forum section: electronics / projects

author: rbm
author_rank: Regular Contributor
timestamp: November 07, 2017, 09:59:44 pm
content: Hi, I bought a motorcycle gauge from Hong Kong that has the following interconnects:https://photos.app.goo.gl/cfZEC7nZhJm0OySh2I've combed Digikey and Mouser for a compatible male plug to mate with these connectors and have turned up nothing. Does this look familiar to anyone? Manufacturer? Possibly the model line?

author: analogNewbie
author_rank: Regular Contributor
timestamp: November 08, 2017, 01:19:22 am
content: https://item.taobao.com/item.htm?id=542956842827Looks like this one.you could search on taobao.com with keywords ?? ???(motorcycle and connector )good luck

author: rbm
author_rank: Regular Contributor
timestamp: November 08, 2017, 01:23:13 am
content: Cheers! That does look like the right type. Now to figure out how to get sets of them to Canada.

author: voltlog
author_rank: Regular Contributor
timestamp: November 08, 2017, 06:05:42 am
content: It seems they are also available on ebay.com just do a search for "motorcycle connector"

author: rvalente
author_rank: Frequent Contributor
timestamp: December 19, 2017, 11:39:04 am
content: Mates, I'd like to avoid opening a new topics...Can some one help me identify these two connectors?From Peugeot 307 Fan Relay

author: calexanian
author_rank: Super Contributor
timestamp: December 20, 2017, 12:40:00 am
content: I was going to say that looks a lot like a turn signal/light switch from a honda bike.
Help identify part - Page 1
Forum section: electronics / projects

author: robson2017
author_rank: Contributor
timestamp: April 20, 2020, 05:53:15 pm
content: Hello,I'm trying to identify F050 (E050) part SOT-23 (5).R.

author: bob91343
author_rank: Super Contributor
timestamp: April 20, 2020, 06:20:01 pm
content: What kind of unit is this?You can resolve the dilemma of whether the first digit is E or F by cleaning it.

author: Yansi
author_rank: Super Contributor
timestamp: April 20, 2020, 06:36:38 pm
content: Could it be LD2980ABM50TR?

author: robson2017
author_rank: Contributor
timestamp: April 20, 2020, 06:41:07 pm
content: It’s a measuring amplifier with built in power supply and the chip isn’t dirty but burnt and unreadable.

author: robson2017
author_rank: Contributor
timestamp: April 20, 2020, 06:58:52 pm
content: Thank you Yansi,where form is this info, do you have pdf etc?

author: Yansi
author_rank: Super Contributor
timestamp: April 20, 2020, 07:11:22 pm
content: No pdf, just using generic google-fu.Verify the part pinout and function reasonably fits inside the device you are repairing. Despite I could not clearly find any "F050" marked other SOT23-5 devices or could not find anything marked "E050", there may by still lot of other devices under the same marking.

author: robson2017
author_rank: Contributor
timestamp: April 20, 2020, 07:13:18 pm
content: Ok, many thanks for help.
Help identify part - Page 1
Forum section: electronics / projects

author: robson2017
author_rank: Contributor
timestamp: August 15, 2018, 05:56:38 pm
content: Hello everybody,could you help me identify parts.I think they are Texas Instrument but i'm not shure on 100% in 10-SSOP(MSOP) case.Top of it has the symbol 17TI ATK.ThanksR.

author: mdszy
author_rank: Unknown
timestamp: August 15, 2018, 08:18:33 pm
content: Quote from: robson2017 on August 15, 2018, 05:56:38 pmSeems to be a TPS60312DGS according tothe datasheet for that series of chips. They're charge pump ICs.

author: robson2017
author_rank: Contributor
timestamp: August 15, 2018, 08:42:53 pm
content: Thanks for help.When you put "ATK" on this link :http://www.ti.com/packaging/docs/partlookup.tsp#divlineyou are right it should be TPS60312DGSBut i was thinking that i need put full symbol "17TI ATK" because i can't find anything.In future, should i only use the last 3 symbols?With RegardsR.

author: mdszy
author_rank: Unknown
timestamp: August 15, 2018, 08:44:46 pm
content: Quote from: robson2017 on August 15, 2018, 08:42:53 pmIf you're searching TI's listing then yes, I believe they only use the last three. The "17TI" is more of a manufacturer mark than a part number, and maybe the 17 part is a datecode. I just googled "17TI ATK IC" and one of the top results was the PDF datasheet. Googling "17TI ATK" didn't find anything, though, so including "IC" or "chip" or a possible manufacturer can help with searching.

author: robson2017
author_rank: Contributor
timestamp: August 15, 2018, 09:11:21 pm
content: Ok, many thanks for infoR.

author: robson2017
author_rank: Contributor
timestamp: July 05, 2019, 04:18:48 am
content: Hello,I'm trying to identify F050 (E050) part SOT-23 (5).R.
help identify pcb type/tech - Page 1
Forum section: electronics / projects

author: oceandesign
author_rank: Newbie
timestamp: February 25, 2019, 08:08:28 pm
content: Hi all,can anyone help me identify the type of pcb technology used in this device and where to find such a fab service?I was looking at a this link in Australian Newshttps://www.abc.net.au/news/2019-02-24/clinical-trials-for-wearing-led-helmets-treatment-parkinsons/10836906and specifically the photo of this device with some type of flex circuit technology but i can't figure out or find it online. thanks

author: dmills
author_rank: Super Contributor
timestamp: February 25, 2019, 09:26:55 pm
content: Looks like a fairly mundane thin metal core / metal substrate PCB of the sort routinely used for LED lighting applications.Doing the design to have a basically flat PCB bend like that and have the holes line up must have been 'Fun'.Not cheap at that size, but quite doable for medical stuff, I dont think there is anything designed as a flex PCB here.Regards, Dan.
Help Identify Q in Air Pump - Page 1
Forum section: electronics / projects

author: NivagSwerdna
author_rank: Super Contributor
timestamp: September 23, 2023, 10:55:01 am
content: I thought maybe there was a topic for component identification but cannot find it so creating a new one...Device in my air pump seems to have split its side so presuming this is the cause of my problem. Air Pump for a pond... this seems to be part of the speed control.Not sure how to read those numbers... Thanks in advance

author: NivagSwerdna
author_rank: Super Contributor
timestamp: September 23, 2023, 11:02:47 am
content: OK looks like a TriacI cannot find any of them but I can source MAC97A8. Does that sound like a reasonable swap?I was reading mine as a 6... maybe it is an 8?

author: moffy
author_rank: Super Contributor
timestamp: September 23, 2023, 11:26:51 am
content: As far as I read it, it is a MAC97A8, so it sounds like the correct part. Be careful if it is connected to the mains. It also looks like there might be signs of corrosion, check the resistors also.

author: Andy Watson
author_rank: Super Contributor
timestamp: September 23, 2023, 11:39:12 am
content: MAC97 - sensitive gate triac. The other letters tell you where and when it was made, etc..https://www.sparkfun.com/datasheets/Components/General/MAC97-D.PDF
Help Identify Radon Detector Module - Page 1
Forum section: electronics / projects

author: fuzzoli
author_rank: Regular Contributor
timestamp: April 02, 2020, 02:10:15 am
content: I just purchased a "Corentium Home Radon Detector by Airthings" to collect radon readings at various locations throughout the house. It's a nice little unit, but of course, I had to take it apart.It's powered by a TI M430F4152 mixed signal microcontroller. I'd love to tap off the point where the uC starts counting and maybe add in a wireless module so I can graph the data over time.In the attached photo, the shielded parts above the uC must be the signal conditioning for the radon detector. Does anyone one recognize which type of detector is being used? It's the round silver thing on the right side of the case. Once I find the specs on the module, reverse engineering the signal conditioner-to-uC connection should be straightforward.Thanks!** Edited to stop all the electrons from falling out. **

author: jmelson
author_rank: Super Contributor
timestamp: April 02, 2020, 02:34:56 am
content: Its an ionization chamber. it is filled with some gas at low pressure, and a voltage is applied between (presumably) an interior plate and the case.Gamma rays go through the case and ionize the gas, and then there's a cascading avalance discharge inside. A small capacitance provides some current to keep the discharge going for some microseconds, when the capacitor charge runs out, the avalance quenches and the circuit recovers to the steady state. A coupling capacitor passes the pulse along to an amplifier.Jon

author: jmelson
author_rank: Super Contributor
timestamp: April 02, 2020, 02:36:59 am
content: Ah, there's a string of replicated components along the bottom of the shielded area. That is a Cockroft-Walton multiplier stack to boost thevoltage for the detector.Jon

author: fuzzoli
author_rank: Regular Contributor
timestamp: April 02, 2020, 02:48:22 am
content: Thanks, Jon! Any clues on a model number for the ionization chamber?

author: LaserSteve
author_rank: Super Contributor
timestamp: April 03, 2020, 02:38:13 am
content: Um, Their web site implies that it looks at Alpha and is an avalanche photodiode.Steve
Help identify: SMS gas plasma alphanumeric unit - Page 1
Forum section: electronics / projects

author: quarterturn
author_rank: Newbie
timestamp: December 18, 2019, 03:46:34 pm
content: I acquired this a few years ago at a hamfest (see photos). It was built by Scientific Measurement Systems. I was told by the seller it was used to let a mainframe operator know which tape should be loaded on which drive. Anyone know what it actually is and how to interface it? The two connectors on the back are electrically linked - presumably to allow the displays to be chained. Of the six pins, two are ground and one is power. It seems to be OK with 12V. The connectors on the top seem like they'd be for lamps. They might be data inputs but it seems unlikely.There's no CPU present on the cards. It appears to be all discrete logic doing whatever it does to the input and for multiplexing the display. I'm guessing the input must be something like synchronous serial due to the small number of pins. The rotary switches suggest it has a way of decoding its address.

author: quarterturn
author_rank: Newbie
timestamp: December 18, 2019, 03:48:33 pm
content: Here's a photo of the nameplate on the bottom.

author: quarterturn
author_rank: Newbie
timestamp: December 18, 2019, 04:00:22 pm
content: Oh wow... it intercepts some sort of IBM mainframe terminal/printer message:http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=3792447.PN.&OS=PN/3792447&RS=PN/3792447Yeah, it's probably going to be easier to just multiplex it myself via the existing HV driver board.
Help identify some SMD components. - Page 1
Forum section: electronics / projects

author: Yamin
author_rank: Frequent Contributor
timestamp: April 27, 2019, 08:27:43 pm
content: Hi, I was hoping if you guys could help me identify these two SMD components. I'm new with SMD components so any tips on figuring out the component markings will be greatly appreciated.The IC has got the markings 7639 X37C. Its used for a flow meter sensor.The next one is a surface mount transistor, with the marking 1AMW on it. It would make a lot of sense if it was a pnp transistor with the middle pin being the base. I have shown the diagram I drew and the diode check measurement results I got. I have indicated the plus sign as the red probe and the negative sign as the black probe of the DMM.

author: thinkfat
author_rank: Unknown
timestamp: April 27, 2019, 08:42:22 pm
content: The 7639 might be a Matsuki ME7639, which is a P-Channel MOSFET. Wasn't able to download a datasheet, but I think there should be plenty of replacements if needed.

author: scuzzyTerminator
author_rank: Regular Contributor
timestamp: April 28, 2019, 06:18:14 am
content: The marking reference sitechip.tomsk.rusuggests MMBT3904L, an NPN from On if "W" is a date code. Several other 3904 variants are marked "1AM"Re:http://chip.tomsk.ru/chip/chipdoc.nsf/vc1!readform&view=smd&cat=1&start=7000&count=500And now I find someone selling 2N3904s marked 1AMWhttps://www.yoycart.com/Product/533780354986/
Help identify the components and functioning of this PCB - Page 1
Forum section: electronics / projects

author: daslolo
author_rank: Regular Contributor
timestamp: April 24, 2019, 01:03:23 am
content: This PCB has a few components which marking have been purposely scraped out.Could anyone help identify the functioning of this thing?It's the main PCB of an Eachine ev200d FPV goggles. It can be fitted with 2 diversity receivers (2x rx5808 each) and something switched between the 4 signals to the one with the highest RSSI. That switching usually happens on the module, between two rx5808, these goggles do this between 2 modules and I think the switching happens on the main board.

author: Nusa
author_rank: Super Contributor
timestamp: April 24, 2019, 02:16:02 am
content: The main board one is probably a microprocessor. Map out power and grounds and a few obvious functions and you might be able to narrow it down.For the scrubbed shields, the obvious thing is to open the can and see what's in there. At your own risk, of course.