hybridfree/eevblog-posts huggingface dataset:
Can anyone help me with a PSU for these LCD "smartFilm" panels? - Page 1
Forum section: electronics / projects

author: EvilSOB
author_rank: Newbie
timestamp: August 29, 2020, 04:40:31 am
content: Hi all.Ive been given these small sample panels of smart film from 'SmartTint . com'.They are 'model' 30624, 30625, and 30626. They are approx 5cm x 10cm in size.According to the website, they operate at 40-60V AC.My problem is, seeing as I'm playing with them as a proof of concept, I dont want tospend $$$$$ on their power supplies if my concept is flawed, so I want to throw togethera quick and dirty bench / protoboard PSU to test with.So I'm looking for suggestions on what specs this PSU will need to have.I am struggling mostly of the AC Frequency, waveform, and duty cycle, and maybecurrent requirements that these panels need to operate effectively.This information MAY be on their website, but I havent found it yet ...So I MOSTLY want help obtaining these specs, and maybe some suggestions on abench PSU (preferably adjustable voltage and or frequency) to supply those requirements.Thanks guys.EvilSOB, Australia...

author: PA0PBZ
author_rank: Super Contributor
timestamp: August 29, 2020, 09:35:43 am
content: https://www.smarttint.com/specs/specsheet-smart-tint.pdf

author: EvilSOB
author_rank: Newbie
timestamp: December 28, 2020, 02:42:30 am
content: Quote from: PA0PBZ on August 29, 2020, 09:35:43 amThanks muchly dude. Very helpful.Sorry I didnt reply sooner, but this project is on hold due to CV19 (I am a carer for my parents) and many otherhigher-priority projects. I did read your reply but never got around to replying... My bad.Thanks again.

author: amyk
author_rank: Super Contributor
timestamp: December 28, 2020, 03:06:15 am
content: Basically a huge LCD pixel... voltages and frequencies are not critical, adjust voltage to the contrast desired. The lower the frequency the more it will flicker, but increasing it will increase power consumption (since it is capacitive). Datasheet basically says you can drive it with mains.
Can anyone help with a contact at Behringer? - Page 1
Forum section: electronics / projects

author: cvanc
author_rank: Frequent Contributor
timestamp: August 26, 2019, 10:22:13 pm
content: I need them to fix a bug in a couple products, and their web-based support is not responsive. Can anyone give me a person I can talk to? Thanks.

author: Mr. Scram
author_rank: Super Contributor
timestamp: August 26, 2019, 10:31:19 pm
content: Quote from: cvanc on August 26, 2019, 10:22:13 pmTake into consideration that they may not be interested.

author: SiliconWizard
author_rank: Super Contributor
timestamp: August 26, 2019, 10:33:24 pm
content: A company not interested in their customers? Damn!

author: Jr460
author_rank: Regular Contributor
timestamp: August 26, 2019, 10:43:37 pm
content: Wait, wait, I joke right? You want support from Behringer?The problem is they are know for taking other brands low-end products and reverse engineering them and making them with even cheaper components. If there is a bug, then they most likely copied that bug from someone else.I do have to say that people have bought a ton of the X32 mixers, mainly because they are so cheap. A rental house doesn't have to worry about a show out the desert getting gear full of sand, they will scrap a X32 before having it fixed.I got a couple of good Behringer stories when the gear sonic shit the bed. Nasty nasty stuff.

author: themadhippy
author_rank: Super Contributor
timestamp: August 26, 2019, 11:21:56 pm
content: QuoteAnd they now own klark teknik,midas and turbosound

author: John B
author_rank: Frequent Contributor
timestamp: August 27, 2019, 01:22:49 am
content: Quote from: Jr460 on August 26, 2019, 10:43:37 pmHere's a funny quote from the brochure for the Ampeg "inspired" Bugera BVV3000 amp:QuoteI mean I get that companies pay attention to each others designs, but Ive always remembered that quote as hilariously unsubtle.
Can anyone help with a magnetic bubble memory software problem? - Page 1
Forum section: electronics / projects

author: Ccandrews
author_rank: Contributor
timestamp: April 16, 2020, 12:34:00 am
content: Using the bubble read command in poll mode, I can not figure out why my bubble memory boardhackaday.iois letting me read past the initial FIFO load. I can write to the bubble and the 7220 FIFO status flag seems to be working fine (or possibly it is writing faster than I am filling). I can also read the boot loop and the boot loop register but those fit in the FIFO so the problem does not show up. The problem only seems to crop up when reading a page from the bubble and then only past the first FIFO load. Operating in polling mode with enable byte of 0x00, and the first FIFO load can be read without problems. Up to about byte 24, the status stays 81H as expected but a few bytes later the data turns to 00H as if reading past the FIFO but the status byte is still 81H. a few more byte reads and the status byte flips directly to 91H but the FIFO ready flag never goes to low as expected. After the full page read, the busy goes low and the status byte is now 30H so it is indicating a failed opcode and timing error as expected for a read past the FIFO load.This has tied me up for most of the day. Anyone familiar enough to with the intel 7110 and 7220 bubble system to be able to give advice?ThanksCraig
Can anyone ID DF1 on circuit board? - Page 1
Forum section: electronics / projects

author: OpenCircuit
author_rank: Regular Contributor
timestamp: April 09, 2021, 04:44:04 am
content: Router does not even show power. "P 075" is getting hot EDIT: Resettable fuse?

author: mhuber1
author_rank: Newbie
timestamp: April 13, 2021, 11:48:13 am
content: Probaply a short circuit somewhere else so the polyfuse gets hot and limits the current

author: harerod
author_rank: Frequent Contributor
timestamp: April 13, 2021, 06:23:05 pm
content: If they follow the Littelfuse nomenclature, this would be0.75mA0.75A nominal current.Check 1812L075. PTC resettable polyfuse.MAH2104141946: corrected the typo. That's a staple item in my designs.

author: wraper
author_rank: Unknown
timestamp: April 13, 2021, 06:25:31 pm
content: Quote from: harerod on April 13, 2021, 06:23:05 pm0.75A
Can anyone ID these MOSFETS? - Page 1
Forum section: electronics / projects

author: max_torque
author_rank: Super Contributor
timestamp: September 14, 2014, 03:10:36 pm
content: Ok, my 'Google-foo' has let me down, so can anyone ID these FETS?They are, I expect, N channel TO-247s, with a pretty healthy peak current capability, as they are from an automotive 'lecy power steering H bridge, so run at a nominal 13.7Vdc

author: dannyf
author_rank: Super Contributor
timestamp: September 14, 2014, 03:16:45 pm
content: sanken.

author: mariush
author_rank: Super Contributor
timestamp: September 14, 2014, 03:23:20 pm
content: As above, made by Sanken...See datasheet below for MLD685D, may be slightly different in specs from the non-D one.

author: max_torque
author_rank: Super Contributor
timestamp: September 14, 2014, 03:51:34 pm
content: Thanks! No idea how i managed to miss that one! Even lists EPAS as suggested use!! ;-)BTW, if anyone wants a cheap low voltage, high current H bridge, modifying this power steering controller looks to be a cinch, as the entire power stage is separate to the control PCB:It has input and ouput isolation (via 2 relays), filter caps, H bridge via 4 of those FETS, and even a current sensor, all built in! And all the control and feedback is via through hole pins that stick up through the control pcb. it would be dead easy to do your own control pcb!
Can anyone ID this 4-pin connector? - Page 1
Forum section: electronics / projects

author: dorkshoei
author_rank: Frequent Contributor
timestamp: October 14, 2016, 06:03:49 pm
content: It's on an old Quantel keyboard. Only 3 pins are used.I'm re-purposing it to connect to a difference piece of equipment and need to construct a cable going from the keyboard to a 3 pin DIN connector. I'm probably just going to remove the current 4-pin connector from keyboard and replace it with a 3.5mm stereo female connector and then just make a 3.5mm male to 3 pin DIN cable.But I was curious as I've never seen anything like it before and I like to indulge my curiosity

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: October 14, 2016, 06:06:27 pm
content: Try Lemo or Fischer

author: Pjotr
author_rank: Frequent Contributor
timestamp: October 14, 2016, 06:12:30 pm
content: It's LEMO. But I know these only with a white Teflon isolation or brown Peek isolation. Chinese imitation?

author: elgonzo
author_rank: Unknown
timestamp: October 14, 2016, 06:12:50 pm
content: LEMO S-connector...

author: dorkshoei
author_rank: Frequent Contributor
timestamp: October 14, 2016, 06:15:24 pm
content: Quote from: elgonzo on October 14, 2016, 06:12:50 pmthanks for the fast replies.it looks expensiveI'm probably better off just going with the 3.5mm jack for my purposes.

author: Gyro
author_rank: Super Contributor
timestamp: October 14, 2016, 06:45:39 pm
content: Just make sure the circuit will be ok with the shorting that will occur as you plug / unplug the 3.5mm Jack.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: October 14, 2016, 06:46:08 pm
content: Quote from: Gyro on October 14, 2016, 06:45:39 pmYes, this did occur to me.

author: senso
author_rank: Frequent Contributor
timestamp: October 15, 2016, 01:34:14 am
content: Mantain the round style with a generic round DIN connector?

author: hlavac
author_rank: Frequent Contributor
timestamp: October 15, 2016, 09:36:39 am
content: Or use 4-pin XLR

author: dorkshoei
author_rank: Frequent Contributor
timestamp: October 15, 2016, 07:27:36 pm
content: Quote from: hlavac on October 15, 2016, 09:36:39 amnot seen these, DIN is way too large, probably 3x the area of the original, I'd rather not drill a huge hole into the case.I'll figure something out. Thanks for the replies!!!!
Can anyone ID this AMP connector please? - issue solved - Page 1
Forum section: electronics / projects

author: aquaaddict
author_rank: Contributor
timestamp: September 07, 2017, 06:52:04 am
content: Hi,Can anyone help ID this connector please, it has AMP stamped on it and dates from around 15 years ago so maybe its just not made anymore, but trying to test equipment at mains volatages so would love to get the right connector rather than trying to hook onto the pins.Thanks,Anthony

author: amyk
author_rank: Super Contributor
timestamp: September 07, 2017, 09:00:52 am
content: Measuring the pin pitch and diameter will narrow down the possibilities considerably.

author: bjcuizon
author_rank: Frequent Contributor
timestamp: September 07, 2017, 09:07:40 am
content: Does it carry power? Or some signals? Where is it connected? To me, it looks like some sort of industrial/automotive connector.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: September 07, 2017, 09:03:57 pm
content: Most probably METRIMATE series.

author: aquaaddict
author_rank: Contributor
timestamp: September 07, 2017, 11:31:45 pm
content: I thought it was Metrimate to, but its a bit different, in the end I managed to hook up to it using some small croc clip leads and paranois about ensuring there was enough gap between them...ThanksAnts
Can anyone ID this chip - from EV motor driver - Page 1
Forum section: electronics / projects

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 05, 2019, 05:11:19 pm
content: Can anyone ID this chip from an electric car motor controller.Pretty sure it's power management/supervisory, probably at least two switchmode controllers inside.GND pins 5,6 ( probably others)Pins 26 & 42 drive Buck MOSFETsQFN44Numbers:A2C43451ATIC91C2TI 29KA91 G4

author: rx8pilot
author_rank: Super Contributor
timestamp: September 05, 2019, 06:12:24 pm
content: Is this part of an automotive system?

author: mc172
author_rank: Frequent Contributor
timestamp: September 05, 2019, 06:22:23 pm
content: It's Texas, but there's nothing on their website or anywhere on Google. You might have to ask them directly.https://www.digipart.com/part/A2C43451

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: September 05, 2019, 06:23:57 pm
content: Quote from: rx8pilot on September 05, 2019, 06:12:24 pmYes- Renault Zoe traction motor controller

author: Towger
author_rank: Super Contributor
timestamp: September 06, 2019, 04:00:24 pm
content: So the green machine is getting a teardown :-)

author: rx8pilot
author_rank: Super Contributor
timestamp: September 06, 2019, 04:33:04 pm
content: I struck out looking for any data on this one.

author: SiliconWizard
author_rank: Super Contributor
timestamp: September 06, 2019, 05:22:16 pm
content: It's available on Aliexpress.https://www.aliexpress.com/i/32810464998.htmlAnd there too:https://www.auto-chips.com/a2c43451-atic91c2-p2283.html"commonly used vulnerable chip for automotive ecu"https://www.jotrin.com/product/parts/A2C43451Definitely seems to be a TI part, but it's nowhere to be found on TI's website (and some resellers mark it as obsolete... if so, nice job Renault!)So yeah, either obsolete or really confidential stuff... Good luck finding a datasheet.

author: mc172
author_rank: Frequent Contributor
timestamp: September 06, 2019, 05:56:37 pm
content: Quote from: SiliconWizard on September 06, 2019, 05:22:16 pmThis link does seem to have a datasheet. I registered and the Javascript ends up taking you here:http://www.ti.com/?filetype=datasheet&kw=A2C43451...which is dead.
Can anyone ID this vintage potentiometer - Page 1
Forum section: electronics / projects

author: dorkshoei
author_rank: Frequent Contributor
timestamp: April 24, 2019, 12:00:42 am
content: I was repairing an old CGA monitor (Thomson 4020) and managed to break off one of the control potentiometers when trying to fit the pcb back into the case ;-(It's marked "7f503". Schematics confirm 50k which is consistent with the 503.Anyone know the manufacturer? There are 6 adjusters and I'd prefer to keep them all the same; I popped the knurled shaft off the broken potentiometer so if I can find a 50k in the same series, even if the shaft is a different length, I can get it working.

author: nAyPDJ
author_rank: Contributor
timestamp: April 24, 2019, 12:25:35 am
content: Doeshttps://www.mouser.com/ProductDetail/Amphenol-Piher/PT15NV02-503A2020-S?qs=sGAEpiMZZMvygUB3GLcD7usKL8k3H%252BdSD61QApuMA%252BWxy1COaSwzcw%3D%3Dfit your dimensions?Shaft seems a little wider, but you might be able to shim that.

author: dorkshoei
author_rank: Frequent Contributor
timestamp: April 24, 2019, 03:31:21 am
content: Thanks. Looks like it might need some modification but worth a shot.Still curious if anyone knows the manufacturer of the original piece.
SUN x5 MAX UV Lamp. - Page 1
Forum section: electronics / projects

author: smil
author_rank: Newbie
timestamp: March 12, 2025, 08:46:38 pm
content: Can anyone identify the 14-pin IC in a UV nail lamp. Pin 4 is VCC, pin 11 is GND, and pin 14 is an output pin connected to the AO97 MOSFET. Pins 3, 5, 6, 7, 8, 9, 10, 12, and 13 are connected to the 7-segment display. Pins 3, 5, 8, and 9 are connected with 5k resistors to 4 push buttons. The upper side of the IC is plain, possibly because the manufacturer removed the part number, but the bottom side has a numberXDS12ARCBLB00002038ABSARlook at picture 1.jpg
Can anyone identify the serial/encoding protocol this scoreboard uses? - Page 1
Forum section: electronics / projects

author: xyk2
author_rank: Newbie
timestamp: April 20, 2014, 05:19:48 pm
content: I am trying to decode a signal stream coming from a Nevco scoreboard controller:Packets like this are sent every ~2.7 ms.I suspect it is some sort of UART signal because it is on the RX line of a ATMEGA48, but I cannot identify the finer protocol details like parity and stop bits. All the combinations I have tried returns junk data, so it may be another encoding scheme. What's unusual is that the same signal is also sent to the MOSI pin of the microcontroller, but there is no clock signal anywhere.A .vcd file:http://pastebin.com/nSFC7U7W.The shortest pulses (both high and low) are always 8us in length.This is what two packets look like. Anyone got ideas?

author: FrankenPC
author_rank: Unknown
timestamp: April 20, 2014, 08:52:24 pm
content: 1-wire??

author: abyrvalg
author_rank: Frequent Contributor
timestamp: April 20, 2014, 09:33:36 pm
content: Looks like UART at 115200 baud with 11 bit frame (so 1 start, 8 data, 2 stop or 1 parity of some kind, 1 stop), no?

author: David_AVD
author_rank: Super Contributor
timestamp: April 20, 2014, 10:00:37 pm
content: Is the data connection between the controller and scoreboard hard wired or wireless ?

author: GiskardReventlov
author_rank: Frequent Contributor
timestamp: April 20, 2014, 10:38:15 pm
content: Here's my guess, they are simply sending the 7-segment data. Some DMMs do this for logging data capability. There was a linux driver on github but I don't remember the name.I recall that the DMM sends the coordinates for the segments. That is decoded into what you'd normally see on the display into usable numbers.

author: SL4P
author_rank: Super Contributor
timestamp: April 21, 2014, 04:20:47 am
content: Can you compare this to something else displayed on the board?e.g. all 1's or all 0'sThen you may see the data change (I'd hope!) Ideally triggering on a specific bit change - so you can start reverse engineering. Dump in HEX would a benefit - rather than ASCII - since that's not showing anything so far.
Can anyone identify these test loop connectors? - Page 1
Forum section: electronics / projects

author: FivePoint03
author_rank: Regular Contributor
timestamp: April 16, 2016, 08:08:21 pm
content: Hi guys,Can anyone ID these 0.2" test loop connectors? (board is a Tektronix MDO Demo)Thanks a lot.

author: Phoenix
author_rank: Frequent Contributor
timestamp: April 20, 2016, 03:12:48 am
content: I just stumbled across the Aavid thermalloy 125700D00000G or 125800D00000G - Looks like what you want. It's used as a heatsink anchor if you look it up in Aavid's catalogue.http://www.digikey.com.au/product-detail/en/aavid-thermalloy/125700D00000G/HS400-ND/1216404

author: cvanc
author_rank: Frequent Contributor
timestamp: April 20, 2016, 03:04:11 pm
content: Quote from: Phoenix on April 20, 2016, 03:12:48 amMaybe, but it looks like it makes a really nice test point!

author: suicidaleggroll
author_rank: Super Contributor
timestamp: April 20, 2016, 03:19:32 pm
content: Quote from: cvanc on April 20, 2016, 03:04:11 pmFixed it for youWouldn't something like this be a bit more reasonable?http://www.digikey.com/product-detail/en/keystone-electronics/5001/36-5001-ND/255327They come in all shapes and sizes if you just search for "test point" on digikey.

author: FivePoint03
author_rank: Regular Contributor
timestamp: October 31, 2016, 08:59:57 pm
content: Phoenix you're a star! I can't believe I missed that this question ever got answered, I was still wondering about this today! Many thanks indeed!
Can anyone identify these two connectors - Page 1
Forum section: electronics / projects

author: Psi
author_rank: Super Contributor
timestamp: December 04, 2019, 02:33:20 am
content: Can anyone identify these two connectors.They are on a racecar.We think one is for an ethernet port and the other maybe ecu serial stuff.Thanks.

author: Psi
author_rank: Super Contributor
timestamp: December 04, 2019, 02:35:13 am
content: We're pretty sure the bigger one is an autosport connectorhttps://www.msel.co.nz/epages/motorsportelectronics.sf/en_NZ/?ObjectPath=%2FShops%2Fmotorsportelectronics%2FProducts%2FCONAS01035SN&fbclid=IwAR2JD4kQVbisZj_NWzs1sFbJ9TdkMPpXHrT7_5iFrIr4mNnG5pzaMgOtP8YBut the smaller one has us stumped

author: DTJ
author_rank: Super Contributor
timestamp: December 04, 2019, 02:44:41 am
content: The small one may be from Lemo or a copy of a Lemo.https://www.google.com/search?biw=1920&bih=938&tbm=isch&sa=1&ei=ax3nXYT8Ke3Wz7sPi8WN2AM&q=lemo++socket&oq=lemo++socket&gs_l=img.3..0.32633.32633..32932...0.0..0.221.613.0j2j1......0....1..gws-wiz-img.uM7PV4vBaCQ&ved=0ahUKEwjE3bHF_JrmAhVt63MBHYtiAzsQ4dUDCAY&uact=5

author: ChristofferB
author_rank: Frequent Contributor
timestamp: December 04, 2019, 04:26:31 pm
content: The mounted one looks like a LEMO.Other one is a pretty standard military connector, pretty sure amphenol and maybe cannon makes them
Can anyone identify this button? - Page 1
Forum section: electronics / projects

author: deephaven
author_rank: Frequent Contributor
timestamp: February 28, 2014, 11:33:54 am
content: See picture

author: deth502
author_rank: Frequent Contributor
timestamp: February 28, 2014, 12:33:16 pm
content: just your standard everyday push button momentary contact switch snapped into a plastic housing??

author: deephaven
author_rank: Frequent Contributor
timestamp: February 28, 2014, 12:49:21 pm
content: Quote from: deth502 on February 28, 2014, 12:33:16 pmI need to get a replacement, so looking for the manufacturer or supplier.

author: bookaboo
author_rank: Frequent Contributor
timestamp: February 28, 2014, 12:50:57 pm
content: Does the cap pull off?

author: deephaven
author_rank: Frequent Contributor
timestamp: February 28, 2014, 01:12:28 pm
content: Quote from: bookaboo on February 28, 2014, 12:50:57 pmYes, the whole square part comes off.

author: bookaboo
author_rank: Frequent Contributor
timestamp: February 28, 2014, 02:34:24 pm
content: Never seen an cap like that, a pic without the cap might be better.

author: deephaven
author_rank: Frequent Contributor
timestamp: February 28, 2014, 02:45:19 pm
content: A couple more pictures:

author: sync
author_rank: Frequent Contributor
timestamp: February 28, 2014, 02:56:31 pm
content: It's from Marquardt. Maybe this series?http://www.marquardt-shop.com/en/products/switches/tact-and-key-switches/6425.html

author: deephaven
author_rank: Frequent Contributor
timestamp: February 28, 2014, 03:43:49 pm
content: Quote from: sync on February 28, 2014, 02:56:31 pmBrilliant, many thanks.
can anyone identify this connector? - Page 1
Forum section: electronics / projects

author: xzcvczx
author_rank: Newbie
timestamp: October 22, 2021, 06:24:14 am
content: before bothering to model and 3d print a female connector for the attached male connector anyone know whether anyone sells female (or pairs) of this connector?i am not sure if its 4 or 8 pin, as it might just be a common pin for each side of the 4 groovesplease ignore the badly drawn dimension lines, i assumed it would be "good enough for Australia"

author: tooki
author_rank: Super Contributor
timestamp: October 22, 2021, 03:19:46 pm
content: What’s it used for? (Like what port is it, on what device?)

author: Terry Bites
author_rank: Super Contributor
timestamp: October 22, 2021, 05:57:10 pm
content: Image far too small to read dims.

author: mikerj
author_rank: Super Contributor
timestamp: October 22, 2021, 06:02:27 pm
content: Looks very much like the USB connector on some of the older cheap generic MP3 players e.g.https://www.pchub.com/juye-serial-data-port-jack-usb-special-usb-mini-4p-p114822You used to be able to get cables from Amazon, usualy called "Mini-B 4 pin" or "Mini 4P", but a quick search didn't immediately throw anything up.

author: xzcvczx
author_rank: Newbie
timestamp: October 22, 2021, 07:07:18 pm
content: larger image,its the "output connector" on the protech calipers from jaycarthe only difference I can see with the usb-mini-4p connector is it seems to have 2 grooves on the flat side, but it gives me somewhere to start, thank you
Can anyone identify this connector - Page 1
Forum section: electronics / projects

author: Simon
author_rank: Unknown
timestamp: April 22, 2015, 06:54:23 am
content: I have been shown a pump (usually aimed at marine applications) with a type of connector we have never seen. We'd need to find the mating half so I'm wondering if anyone has ever used one or know what it is. pictures attached. The thread is a 3/4-20 UNEF-2A

author: Marco
author_rank: Super Contributor
timestamp: April 22, 2015, 02:20:33 pm
content: Tepas is non responsive?

author: Pillager
author_rank: Unknown
timestamp: April 22, 2015, 06:41:36 pm
content: Looks like a standard round DC-connector with a thread to secure it (and for waterproofing). In that case it should match a normal round plug of the right size.I've seen something similar (just in plastic, for those outdoor LED strips).What dimensions are we talking about here?

author: SeanB
author_rank: Super Contributor
timestamp: April 22, 2015, 09:16:25 pm
content: Looking at the voltage and the thread style I will look at the circular threaded military connectors made by Amphenol, Socaplex or other suppliers, as this lloks like an aircraft part. If not then they will have a socket and plug that will fit the 4 mounting holes and which will handle the 20A of current.
Can anyone identify this crimp terminal? - Page 1
Forum section: electronics / projects

author: mrnuke
author_rank: Regular Contributor
timestamp: April 11, 2017, 06:21:21 am
content: I got a lot of these from a surplus sale, but I have no idea what they are. They look like 2.54 mm pitch sockets, and they crimp well with a TE 90202-2 or Molex 64016-0201 crimpers, but the wiper contact apears to be on the outside.Does anyone have any experience with these?Disclaimer: Grid spacing on the paper is 6.35mm.

author: jpanhalt
author_rank: Super Contributor
timestamp: April 11, 2017, 10:52:47 am
content: Looks like a bifurcated bellows contact from a single-side, card-edge connector. DigiKey only had 174,000 or so entries to search through, and my coffee was getting cold.John

author: ajb
author_rank: Super Contributor
timestamp: April 11, 2017, 11:28:17 am
content: http://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=1654080_Card_Edge&DocType=DS&DocLang=Englishpage 155. Found by googling for "crimp on card edge connector"after jpanhalt's suggestion; it was the 4th result.

author: calexanian
author_rank: Super Contributor
timestamp: April 12, 2017, 12:45:26 am
content: Quote from: ajb on April 11, 2017, 11:28:17 amQuick, go buy lottery tickets! That was a amazing quick ID. The force must be with you today.

author: mrnuke
author_rank: Regular Contributor
timestamp: April 12, 2017, 06:40:26 am
content: Wow Gents! Thank you very much!!! After getting your pointers, I was able to play around with some datasheets and some caliper magic, These are TE AMP TWIN-LEAF.More specifically 1-583853-1 or 1-583853-9.The terminal dimensions match exactly to what the datasheet says.
Can anyone help identify this Chinese IC manufacturer ? - Page 1
Forum section: electronics / projects

author: chris_leyson
author_rank: Super Contributor
timestamp: December 03, 2017, 06:39:39 pm
content: Can't identify this IC it might be UC2843 or similar.

author: chris_leyson
author_rank: Super Contributor
timestamp: December 03, 2017, 08:33:46 pm
content: Well I only got this far, something power electronics, can't get the first character

author: marshallh
author_rank: Unknown
timestamp: December 03, 2017, 10:52:30 pm
content: Jiqiang Electronics is my guesshttp://ccne.mofcom.gov.cn/1095787The characters are edit: can't seem to post hanzi?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: December 03, 2017, 11:20:38 pm
content: Quote from: blueskull on December 03, 2017, 11:07:18 pmSo they can remove the previous markings, leave a perfectly smooth surface, and mark with Chinese characters?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: December 03, 2017, 11:46:10 pm
content: Quote from: blueskull on December 03, 2017, 11:23:05 pmI'd like to send my C64 ICs over there and have them marked with various amusing obscenities. Feasible?

author: chris_leyson
author_rank: Super Contributor
timestamp: December 04, 2017, 06:37:43 am
content: Thanks marshallh, that was about as far as I managed.It hadn't occured to me that they would re mark the part, that was kind of themhey at least I learnt three Chinese charaters and that can't be bad.
Can anyone identify this LCD voltage generator chip labelled BD2X 833028? - Page 1
Forum section: electronics / projects

author: david.given
author_rank: Contributor
timestamp: August 28, 2021, 10:57:11 am
content: This is, as far as I can tell, the circuit which generates the LCD contrast voltage for an AlphaSmart Dana, a 2000s-era laptop thing running PalmOS. AFAICT the 8-pin chip labelled BD2X 833028 (or something like that) is the heart of it; the main processor talks I²C (or something similar) to it to tell it what to do and what voltages to generate. (I've tried sending it commands, and I can make it turn on or off but can't adjust the actual generated voltage.)I want to know precisely what it is so that I can find the datasheet and look up the command set, but I'm having no luck identifying it. Can anyone pin this down any further?
Can anyone make out what this circuit is supposed to do? - Page 1
Forum section: electronics / projects

author: Sonny_Jim
author_rank: Unknown
timestamp: December 02, 2017, 11:40:32 am
content: From thistruly shitty kickstarterI saw the following picture and I'm trying to work out what their circuit actually is. Unfortunately I couldn't find a higher resolution picture.EDIT1: Ok so I found the items on the right of the image, it's from aiFixit article on airpods(scroll down to step 19, it's the second picture). Still looking to find where they got the schematic from.EDIT2: The motor datasheet and technical drawing has been pulled directly fromThis alibabalisting. Still trying to find a source for that schematic thoughEDIT3:Found it!

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 02, 2017, 12:18:16 pm
content: Isn't it just a "time-out" circuit? Push the button and it turns on the power for x number of seconds. Rather surprising that it is so "analog". People use dirt-cheap micro-controllers for everything these days.As you say, the image is too fuzzy (likely by intent) to tell exactly. What are those two boxes? CMOS switches? It seems overly-complex for a simple time-out. Is there an oscillator in there?

author: Marinated
author_rank: Contributor
timestamp: December 02, 2017, 12:21:00 pm
content: Looks like a miserable attempt at a 555-based PWM driver. Pairing it with the irrelevant image on the right tells you all you need to know about the calibre of these people and their scam.

author: Sonny_Jim
author_rank: Unknown
timestamp: December 02, 2017, 12:26:13 pm
content: They've got to be so lazy to have just copied and pasted the schematic from somewhere, I just haven't found where yet.

author: amyk
author_rank: Super Contributor
timestamp: December 02, 2017, 05:46:54 pm
content: Quote from: Richard Crowley on December 02, 2017, 12:18:16 pmI see 4 inverters and 2 flip-flops/latches.

author: Richard Crowley
author_rank: Super Contributor
timestamp: December 02, 2017, 06:42:30 pm
content: It looks very much like pushing the button charges up the capacitor which triggers the rest of the circuit. But why not simply drive the gate of that final switching transistor? What is the function of the two intermediate things (flip-flops or whatever)?

author: Sonny_Jim
author_rank: Unknown
timestamp: December 03, 2017, 01:28:51 am
content: Found it, someone had linked to it in the kickstarter comments section. It's for a button that you can 'double press' within a certain amount of time to activate:https://electronics.stackexchange.com/questions/131378/double-tap-push-button-which-resets-if-not-pressed-twice-in-quick-succession
Solved --- Can anyone recommand me a quality portable Dvr? - Page 1
Forum section: electronics / projects

author: sam1275
author_rank: Frequent Contributor
timestamp: August 27, 2016, 06:19:48 pm
content: Hi everyone.I need a portable Dvr to record AV video for a project, but I found most of them on internet are low quality Chinese white brand rubbish. The only one I found good is Philips Pmc7230, but it's highest resolution is 640*480, I want one capable to record 800*600 or even higher, at 50hz PAL, 4:3 format, are there any big brand have those products?Thanks.

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 27, 2016, 07:05:18 pm
content: https://www.blackmagicdesign.com/products/hyperdeckshuttleThat's the best one on the market, but the price might be out of your budget. If you're looking for something a little cheaper, try looking for standalone game recorders.

author: sam1275
author_rank: Frequent Contributor
timestamp: August 28, 2016, 04:34:52 am
content: Quote from: NiHaoMike on August 27, 2016, 07:05:18 pmThank you very much, but I need one with screen...

author: Someone
author_rank: Super Contributor
timestamp: August 28, 2016, 09:45:18 am
content: Quote from: sam1275 on August 28, 2016, 04:34:52 amTheir video assist?https://www.blackmagicdesign.com/au/products/blackmagicvideoassist

author: sam1275
author_rank: Frequent Contributor
timestamp: August 28, 2016, 01:51:40 pm
content: Quote from: Someone on August 28, 2016, 09:45:18 amGreat, although it's a bit over kill, it's still a very good choice! Thank you very much!

author: Someone
author_rank: Super Contributor
timestamp: August 28, 2016, 10:40:38 pm
content: Its only going to record and display broadcast video formats, so it really depends on what the source is.

author: westfw
author_rank: Super Contributor
timestamp: August 28, 2016, 11:08:18 pm
content: I didn't think PAL was capable of even 640x480; much less higher resolutions?

author: Someone
author_rank: Super Contributor
timestamp: August 29, 2016, 01:12:01 am
content: Quote from: westfw on August 28, 2016, 11:08:18 pmThe digital equivalent of "PAL" is 704×576:https://en.wikipedia.org/wiki/576pBut thats not listed in the supported resolutions of the device, a computer will probably select some sort of 1080p, 1080i, or 720p signal if plugged into the HDMI port.
Can anyone recommend any current fed push-pull boost controllers ? - Page 1
Forum section: electronics / projects

author: chris_leyson
author_rank: Super Contributor
timestamp: February 10, 2016, 07:28:53 pm
content: I'm looking for a push-pull controller with overlapping conduction time, my design has a push-pull transformer, 4 windings on a WE-FLEX EFD20 and the primary centertap is connected to the supply through a small boost inductor. If you turn both of the push pull mosfets on then that "charges up" the boost inductor. I'm stepping up 18-36V to 48V at 50W. Simulations look good, Volt time product is in spec and so are the rms currents.Am I doing this the wrong way ? I could just drive the transformer centertap as a boost node and take out the diode and capacitor, anybody know of any combined push-pull and boost controllers ?

author: chris_leyson
author_rank: Super Contributor
timestamp: February 11, 2016, 06:40:02 am
content: I figured it out, just invert the the two drive outputs, then you will get overlapping conduction. The current limit circuitry would have to be external, timing is all wrong for the push-pull controller internal current limit.http://www.ivobarbi.com/PDF/artigosCongresso/99/00573330.pdf
can anyone tell how to implement mqtt on lwip with rtos  - Page 1
Forum section: electronics / projects

author: me.rishabh12
author_rank: Contributor
timestamp: May 21, 2018, 06:21:11 pm
content: i am working on a project which uses lan phy and stm32f429 i want to develop a mqtt client buy using lwip and rtospls guide me im just stuckhow to get things started?
Can anyone tell me the capacitor values of C1 and C2? - Page 1
Forum section: electronics / projects

author: Alexandros81
author_rank: Regular Contributor
timestamp: February 05, 2018, 12:01:34 pm
content: Hi!I am attaching the Protel Schematic of a product I bought from ebay:DS3231 AT24C32 Memory Module For Arduino IIC Precision RTC Real Time ClockCan anyone tell me what are the values of C1 and C2?Also, is C1 used for DS3231 and C2 for AT24C32?It is mentioned in DS3231 datasheet that a decoupling capacitor is needed between Vdd and Vss (0.1uF to 1uF)Is the other capacitor used for the EEPROM IC?Also, for a project I am doing at the moment I am using the microchip IC EEPROM 24AA64. Do I need a capacitorbetween Vdd and Vss? If yes what value?Thanks,Alexandros

author: glarsson
author_rank: Frequent Contributor
timestamp: February 05, 2018, 12:07:41 pm
content: The values are 104 and 105.104 = 10 0 0 0 0 pF = 100nF = 0.1uF105 = 10 0 0 0 0 0 pF = 1000nF = 1uF

author: Zero999
author_rank: Super Contributor
timestamp: February 05, 2018, 01:26:59 pm
content: Quote from: Alexandros81 on February 05, 2018, 12:01:34 pmYes, it's good practise to use a decoupling capacitor. The value isn't critical: 100nF is the typical default value to use and put it as close to the IC's power supply pins, as possible.

author: Alexandros81
author_rank: Regular Contributor
timestamp: February 05, 2018, 07:16:54 pm
content: Also, is C2 used for DS3231 and C1 for AT24C32?

author: Audioguru
author_rank: Super Contributor
timestamp: February 05, 2018, 10:17:27 pm
content: Quote from: Alexandros81 on February 05, 2018, 07:16:54 pmNo, they are all in parallel.1uF filters low frequencies well but is poor at high frequencies.100nF filters high frequencies well but is poor at low frequencies.
Can be cheap DC/DC bricks used to power gate driver ?  - Page 1
Forum section: electronics / projects

author: Miyuki
author_rank: Frequent Contributor
timestamp: March 19, 2020, 05:33:51 pm
content: Hi folks,just a quick question, will commonDC/DC brickwork reliable as insulated gate power ?They commonly dont have much specifications about them. Just DC voltage and some vague capacity.Will they work with 400V transients at output side / high side driver ?

author: wraper
author_rank: Unknown
timestamp: March 19, 2020, 05:45:25 pm
content: QuoteThey will work as power source for gate driver but not as gate driver itself.QuoteLook at isolation voltage spec. Also if there is high isolation capacitance between primary and secondary side, it may be troublesome in some applications.

author: Miyuki
author_rank: Frequent Contributor
timestamp: March 19, 2020, 06:10:15 pm
content: Quote from: blueskull on March 19, 2020, 05:53:07 pmOh thanks I see them in catalogue, but they are way more expensive than common ones :/

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 19, 2020, 06:30:50 pm
content: Yes but...- The above. Needs high immunity. Not hard to achieve, but if it's not rated, who knows? Also, if you're using GaN, I would definitely want to see a rating, since the dV/dt is just so high.- Isolation is usually poor, functional 1kV for example. This may be technically adequate, but it may also lead to poor reliability versus a proper reinforced barrier.Expect to pay more for parts with these ratings, or by solving it yourself with a discrete supply (and probably custom magnetics).Tim

author: Miyuki
author_rank: Frequent Contributor
timestamp: March 19, 2020, 07:19:48 pm
content: I dont want to use something exotic like GaN, but even today IGBTs can switch pretty fast (like that Infineon H5 ones can get over 20 V/ns)I wanted to avoid discrete supply, that is why I asked, but still want to keep it cheapIf discrete supply will be only reasonable way, I still want to avoid custom magnetic if possibleAs I look to general purpose ones without immunity they tend to have 5 to 10 times higher capacity between sides

author: wraper
author_rank: Unknown
timestamp: March 19, 2020, 07:33:18 pm
content: The question is, do you really need it to begin with? What is particular application? Half-bridge gate driver with bootstrap might work just fine without any shenanigans.

author: Miyuki
author_rank: Frequent Contributor
timestamp: March 19, 2020, 07:46:29 pm
content: wraper: At Half-bridge it is simple, but with buck can be a problem and things like three level inverter ...
CAN Bit Time Calculator & docs - Page 1
Forum section: electronics / projects

author: Gabri74
author_rank: Regular Contributor
timestamp: September 14, 2015, 05:20:45 pm
content: When looking for info to better debug a communication problem between two different MCUs CAN,I found this site:http://www.bittiming.can-wiki.info/It has a lot of useful info on CAN and a script to calculate optimal CAN bit timing for different vendorsMCUs and CAN implementations (flexCAN, D_CAN, bxCAN, etc).I'll attach below a PDF document (link found in above site) with detailed informations on CANbit frame format.CAN is a big beast, hope this will help others has had helped me

author: kaz911
author_rank: Super Contributor
timestamp: September 14, 2015, 05:43:10 pm
content: great resources - thanks!
CAN Bus and USB on the same pins - Page 1
Forum section: electronics / projects

author: NW27
author_rank: Regular Contributor
timestamp: July 31, 2019, 01:56:37 am
content: Hi,I'm developing a device that will probably use a STM32 and will primarily use the CAN bus as it's normal communication method. It could be connected to a CAN network with 20 other devices?If the firmware requires updating, I would like it if the device could be disconnected from the CAN network and connect as a USB Comm device to a computer for firmware updating.The reason for this is that I'm very limited on the number of external pins (six) available out of the device.1- Pos Supply2- Neg Supply3- Reset4- Comms-1 (CAN_H / USB D+)5- Comms-2 (CAN_L / USB D-)6- PWM Input for Wakeup and Comms Type (CAN/USB)Ie CAN_H physically connected to USB D+ and CAN_L physically connected to USB D-.A third pin would be used to advise the STM32 what mode of communication it should be using ie Normal communication (CAN Bus) or Boot loader mode (USB).Has anyone tried this style of thing before?Thanks,Neil.

author: eliocor
author_rank: Unknown
timestamp: July 31, 2019, 02:33:34 am
content: If you need to do some firmware upgrade, just take a look at the following document:https://www.st.com/content/ccc/resource/technical/document/application_note/56/94/0c/7d/63/f6/4d/96/CD00264321.pdf/files/CD00264321.pdf/jcr:content/translations/en.CD00264321.pdf(without using the USB bus, but just the CAN bus)

author: NW27
author_rank: Regular Contributor
timestamp: August 04, 2019, 11:24:11 pm
content: Great info,Thanks.
CAN bus messages sniffing - Page 1
Forum section: electronics / projects

author: ppTRN
author_rank: Regular Contributor
timestamp: December 21, 2022, 07:24:53 pm
content: Hi everyone,I am starting a simple project for gathering and analize the CAN bus traffic in my car (a 2011 ford fiesta). I found a nice sheet that summarize all the messages and their (supposed) meaning:https://groups.google.com/g/openxc/c/FrZA8-pDs6AApparently this IDs have been taken via sniffing the bus and analyzing the change in the bytes when doing something. So I wander, how are commercial product that uses the can bus desinged? I mean, do engeneers extensively study the can bus of every single car, or maybe buy the info from manufacturers, or maybe are these infos freely available?Thank you!

author: moffy
author_rank: Super Contributor
timestamp: December 21, 2022, 07:40:04 pm
content: The OBDII port, I believe, has a standard set of messages that are implemented across manufacturers, probably there are mandatory and optional ones. The car manufacturers run their own CAN communications, usually on multiple busses, and proprietary messages. Commercial CAN products, know how to debug not only the OBDII messages, but also a given number of manufacturers. Sometimes you have to pay a fee to access certain models of cars or manufacturers. Commercial scanners, I believe but could be wrong, get the car manufacturers data from the manufacturer for a fee. I think there is some sort of requirement in the USA which has filtered to the rest of the world. You should look for DIY OBD scanners as there are a few about.

author: ppTRN
author_rank: Regular Contributor
timestamp: December 21, 2022, 08:13:14 pm
content: Thank you for you reply. Sure the fact that there can be multiple can busses is new to me, I did not know that. I think I will try to compare various known messages from several different cars (if I can find any of course) so that I can see any similarities and find the supposedly mandatory mesages that you mensioned. Thanks again.

author: rvalente
author_rank: Frequent Contributor
timestamp: December 21, 2022, 09:59:12 pm
content: The good tools are paid: Vector (a set will run for 5 to 6k euro) or Kvaser (2 to 4K)The CAN message is known as DBC, there are various projects to decode those messages, google for FORD CAN DBCBut there are others I've seen, personally only used Vectorhttps://cantools.readthedocs.io/en/latest/https://pypi.org/project/cantools/https://gist.github.com/jackm/f33d6e3a023bfcc680ec3bfa7076e696

author: pardo-bsso
author_rank: Frequent Contributor
timestamp: December 22, 2022, 01:03:05 pm
content: Here at work we are using the kvaser tools. They've been working 24/7 flawlessly.
CAN bus termination? - Page 1
Forum section: electronics / projects

author: ToBeFrank
author_rank: Regular Contributor
timestamp: September 02, 2011, 03:50:08 am
content: I'm developing a pcb that will be a node on an automotive CAN bus. From what I understand, only the ends of the CAN bus need to be terminated with 120 Ohm resistors. The following image illustrates what I've been reading about termination. Am I correct that I shouldn't have the 120 Ohm termination in my circuit?

author: Bored@Work
author_rank: Super Contributor
timestamp: September 02, 2011, 05:53:40 am
content: Quote from: ToBeFrank on September 02, 2011, 03:50:08 am60 Ohm resistors (or 56 Ohm resistors), not 120 Ohm resistors. 2x 60 Ohm = 120 Ohm.Quote from: ToBeFrank on September 02, 2011, 03:50:08 amYes, so it depends on what is already in the car, and where you will connect your ECU to (e.g. an until now unused (diagnosis, CAN gateway) CAN bus in a point-to-point config might not have the termination on your side).However, if you use one of the de-facto standard connectors for CAN I would always leave the termination off the board. For the unlikely case that you later figure you need a termination you can just add an external one, like the first item on this pagehttp://www.ixxat.com/can_accessories_en.html

author: Unknown
author_rank: Unknown
timestamp: September 02, 2011, 05:54:42 am
content: The CAN bus physical layer consists of a two wire (CAN-H and CAN-L) differential bus and a signalground for reference.Your circuit is correct. Most implementations will only use a single 120 ohm resistor between H & L. If you are designing a board I'd suggest you add a pin link to your board so the terminating resistor can be switched in and out depending on what other terminations exist in your real world implementations.

author: ToBeFrank
author_rank: Regular Contributor
timestamp: September 02, 2011, 06:24:16 am
content: Quote from: Uncle Vernon on September 02, 2011, 05:54:42 amCan you explain what you mean by "pin link"? I'm thinking a software controlled termination, but I have no idea how to implement that.

author: Unknown
author_rank: Unknown
timestamp: September 02, 2011, 06:33:10 am
content: Quote from: ToBeFrank on September 02, 2011, 06:24:16 amOne ofthese!Hardware only, No Software required.