hybridfree/eevblog-posts huggingface dataset:
Can In The Middle - Page 1
Forum section: electronics / projects

author: Vannystick
author_rank: Newbie
timestamp: August 20, 2019, 08:55:14 pm
content: So I have a problem, isn't that the way it always starts?I want to put a car infotainment screen into my car, which came from a higher spec vehicle. Simple enough, the car tells the screen what model of car it is by a message on the CANbus, so my simple aim is to create a module that takes all the CANbus signals in, changes with the single message that needs changing, and push it all into the screen. Oh and pass all the return messages straight back.Not a complicated project at first, I took an Arduino, couple of cheap can shields, build a 12v regulator, through a bit of code together and it worked. Problem was that a breadboard solution was no good in a car! So it quickly got moved to a bit of perf.Well probably as a result of watching too much EEVBlog on youtube, I figured I should just make a PCB for it. It was a bit of a hack, created in Fritzing and sent of the JLCPCB. You have no idea how excited I was when it came back. I told my entire world, no one was that bothered. Until I was able to re purpose one at work, over night, and get us some what out of trouble.Well okay then, but if I want it in the car permanently, but without rewiring the car, it seemed sensible to improve the PCB to remove daughter board and include the matching connector from the screen. This allows the existing harness to plug into the module and a flying lead to carry out to the screen. Simple. But not something Fritzing was going to manage. The only solution, figure out KiCAD. And it really wasn't too hard to do. I followed a youtube instructional video and had everything redrawn in KiCAD in no time at all. Better still, my usual supplier of one off components (RS in the UK) offers compatible models of components that can be imported directly into KiCAD using Library Loader. This really simplified things, and hopefully means I will get 'perfect' boards when they arrive from JLCPCB next weekI'm pretty much winging it off GCSE electronics which I did an incredibly long time ago. Pretty sure, based on the chemicals, schools wouldn't be allowed to make PCBs the way we used to!Is there anywhere I can go for constructive circuit/PCB design review/appraisal?
CAN ISO11898 to ISO11992 converter - Page 1
Forum section: electronics / projects

author: rvalente
author_rank: Frequent Contributor
timestamp: May 19, 2023, 06:30:21 pm
content: Hello mates,I need to test an ECU based on ISO11992 but my interface is a Vector VN1630, with TJA1040 transceivers (ISO11898) the voltage levels between 11992 and 11898 is quite different. 11992 is basically used between trailers and truck in 2 node network.The availability of transceivers for 11992 is quite non existent, the only one I've found was Temic (atmel) B10011S, nowadays only Wabco seems to use this 11992 crap.Does any one have a light to build a converter?Greetings

author: dmendesf
author_rank: Frequent Contributor
timestamp: May 20, 2023, 04:34:32 pm
content: Are you sure your interface can decode the packets? If this is a one off project then I think a pair of comparators will do just for listening purposes. If you need to inject packets then things start to go messy but still for one off maybe a discrete implementation CAN be arranged (pun intended).

author: rvalente
author_rank: Frequent Contributor
timestamp: May 21, 2023, 10:48:11 pm
content: Yes, I'm sure, the protocol is the CAN 2.0A (11bits) only the voltage levels are different.
Can mosfet driver supply  continuous current of 2Amps? - Page 1
Forum section: electronics / projects

author: Aankur
author_rank: Newbie
timestamp: May 06, 2022, 02:47:59 pm
content: HelloI am using a MOSFET driver circuit to supply power from one section to another section in my design.I need to pass 2Amps current from one section to another section in my design.I have selected SI2301 (p-channel mosfet) and SI2302 (n-channel mosfet).My application is a continuous running application.For how long can the MOSFET driver circuit supply a continuous current of 2 Amps?ThanksAnkur

author: jpanhalt
author_rank: Super Contributor
timestamp: May 06, 2022, 04:02:13 pm
content: You cannot increase the current and keep the voltage the same continuously without another source.

author: Terry Bites
author_rank: Super Contributor
timestamp: May 06, 2022, 05:13:59 pm
content: Short answer no. This P-channel mosfet is only rated at -2.3A at its best probably more like -1.5A on a pcb in a warm enclosure. Its life will be short and smokey. How about a SI2371?You want the lowest Rdson*Id you can afford (Id more like 5A) for relaibility. In fact a 5A device may well be cheaper. The NMOS only has to sink a few mA making R3 superfluous. You can get away with the most lowly npn With R65 increased to 10k.
CAN network cabling - Page 1
Forum section: electronics / projects

author: Red_Micro
author_rank: Regular Contributor
timestamp: November 18, 2021, 04:35:12 pm
content: Is it a good practice to double crimp wires in cheap connectors to daisy chain? I’m brainstorming a simple 4-wires cabling architecture that will carry both power (5V) and data for a small CAN network, overall length would not be more than 2m. I think UTP cables are OK. I don’t like having two headers on the PCB for daisy chaining as disconnecting one node would break the whole bus. Perhaps a hub like those used in I2C could be useful. Anyone with experience or ideas/connectors in bus wiring for small industrial application?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 18, 2021, 05:11:32 pm
content: If it meets the size range for the terminal, it's fine.Doubling up wire, roughly speaking, is worth -3 AWG, so a 22-24AWG crimp should use 2 x 26AWG for instance. A 20-24 crimp could use 24 and 2 x 24 (~= 21) safely.Also if you're just doing a few-offs, finer wire can arguably be used with oversized crimps (like 26 or 28 in a 22-24 crimp), if you fold over the end, or secure it with solder. The insulation grip / strain relief part obviously won't work so well, mind; it can be tightened up with pliers.Tim
Can NRF24L01 receive data in standby mode I? - Page 1
Forum section: electronics / projects

author: Dhanushka
author_rank: Regular Contributor
timestamp: May 30, 2020, 11:54:16 am
content: Dear all,Can I use an nRF24L01+ module as receive acknowledgement in standby mode I to generate interrupt on IRQ PIN as in the "network ping sleep" example of RF24 Network library?example:https://github.com/nRF24/RF24Network/blob/master/examples/Network_Ping_Sleep/Network_Ping_Sleep.inoAs my understanding this module can receive acknowledgement in standby I mode. Please tell me how implement between two nodesinstead of large network. This code is confusing me. So, I expect simple guidelines for arduino IDE with help of the library.Sometimes, I may not understand the right function of the above library example. If I am wrong, please someone simplifies the idea of the above example.Thanks

author: nuclearcat
author_rank: Unknown
timestamp: May 30, 2020, 05:47:50 pm
content: I think this library is misleading.NRF in Standby-I and II modes can't receive or send anything. It is just to make shorter startup times.
Can sb. please translate this piece of dtsh from Japanese? - Page 1
Forum section: electronics / projects

author: Yansi
author_rank: Super Contributor
timestamp: May 27, 2018, 01:43:35 pm
content: Hello,could somebody please translate this piece of datasheet from Japanese?Thank you !//EDIT: Tried OCR a few times using different tools, but not much luck. Only found out the output is clipped sinewave. That was the only interesting result of translation using OCR. Arrrr..!

author: gamalot
author_rank: Super Contributor
timestamp: May 27, 2018, 02:35:45 pm
content: Hope this helps.

author: Yansi
author_rank: Super Contributor
timestamp: May 27, 2018, 02:45:14 pm
content: That was actually of a bit more help, than that cheeky bitching words cleaningOut's. Thanks.You know cleaningOut, if you do not want to help, you can always just GTFO. No need to be cheeky, especially if you do not know what exactly I do need it for. I do not owe you anything.
CAN Simple - Page 1
Forum section: electronics / projects

author: ColCon
author_rank: Contributor
timestamp: October 27, 2020, 02:31:10 pm
content: Something I've been working on for awhile; a really simple CAN Bus setup for robotics or just desktop experimentation.DIY hardware for about $10 a node at:https://hackaday.io/project/174016-can-simpleSoftware protocol for up to about 30 nodes at:https://hackaday.io/project/174796-can-simple-protocol

author: dellsam34
author_rank: Regular Contributor
timestamp: October 28, 2020, 04:02:51 am
content: Quote from: ColCon on October 27, 2020, 02:31:10 pmWhat type of motor control is this? FOC or normal commutation?

author: ColCon
author_rank: Contributor
timestamp: October 29, 2020, 05:03:17 pm
content: The motors are 12V BDC each driven by an MD13S. These drivers will do both sign-magnitude and lockanti-phase (I use lock anti-phase).
Can somebody grab a download from Baidu for me? - Page 1
Forum section: electronics / projects

author: sleemanj
author_rank: Super Contributor
timestamp: July 16, 2022, 10:59:44 am
content: Any chance somebody with a Baidu account could grab a folder for me, theRCWL-9610 folder here is what I need.It's a datasheet, PCB schematic and example code for a chip used on a new 2022 version of the HC-SR04 ultrasonic sensor modules, for which there is very little (read: no) information available about it's UART, IIC and 1-Wire modes on the internet other than what is in this folder which only Baidu users can actually download.

author: sleemanj
author_rank: Super Contributor
timestamp: July 16, 2022, 12:52:26 pm
content: A very helpful user downloaded these for me in a DM I've put them here in case any future googlers need them for the2022 HC-SR04 / 2022 HC-SR04P / RCWL-9610 Datasheethttps://sparks.gogo.co.nz/assets/_site_/downloads/RCWL.zip
Can somebody please try ID this electrical item and what the circuit does? - Page 1
Forum section: electronics / projects

author: habanerocat
author_rank: Newbie
timestamp: May 08, 2024, 12:40:25 pm
content: This part of the circuit may be in relation to refrigeration or cooling in general.I've been asked to evaluate this circuit but I don't know what IL1 is.I assume BS21 is a switch, switching possibly temperature probes.But I'm confused in general. Can anybody help.

author: ajb
author_rank: Super Contributor
timestamp: May 08, 2024, 02:21:17 pm
content: BS21 is a manual rotary switch based on the symbol. IL1, I would guess a temperature switch or controller of some sort. The rectangle plus the dashed line to the adjacent normally open contacts suggest a relay, with the rectangle being the coil, but in this case it probably represents power supply connections to that device. The diagonal line with the horizontal segment is similar to an NTC, and the output apparently controlling a compressor certainly suggests temperature control. The 'A B C' and 'D E F' blocks I guess would be control inputs, so that would fit with your suggestion that BS21 is switching temperature probes.There are a handful of different styles/standards for symbols in wiring diagrams like this, plus sometimes people just make things up when there isn't a a suitable standard symbol. Sometimes it helps to take a guess and do an image search for '____ wiring symbol' or similar and see if anything looks like a match. Or sometimes you just have to trace out the device (those numbered connections can be a big help, if the wires are actually labeled), and see what the thing physically looks like

author: habanerocat
author_rank: Newbie
timestamp: May 08, 2024, 03:17:08 pm
content: Many thanks for the reply. The machine is long since gone. It never really worked but now that are trying to propose an new one.I'm not familiar with single wire temperature probes but I suppose that could be two, twin wire probes being switched. It's not usual to switch probes either with a relay.They have another machine with a three wire Ice Probe and controller. See attached.So I'll have to assume something similar was going on here.Thanks again.

author: kevin.gibbs
author_rank: Regular Contributor
timestamp: June 27, 2024, 03:36:36 pm
content: I can assume IL1 is the thermostat that turns the compressor on and off.
Can someone build an electronic circuit for me, I have the schematic...mostly - Page 1
Forum section: electronics / projects

author: carlosinseattle
author_rank: Contributor
timestamp: October 07, 2020, 04:58:05 pm
content: I'd like to find someone who can help me finalize and refine a circuit for a slot car project. I have the schematic and pictures of a prototype unit built by someone else who abandoned the project a few years ago.It works for the most part, but the last stage doesn't work reliably.So what I'd like is help redesigning the over voltage and current protections part of the circuit, and also redesigning the main circuit to reduce the footprint. This is for a hobby project so I don't have a lot of money for help, maybe a couple hundred bucks or so. Or if anybody is willing to take it as a pet project that would be great too:)I originally posted this question around 7 months ago and found a local guy to help, but it was a little over his head. If you're willing or interested I can send you a link to a Google drive with the schematic, not sure if I have rights to post pictures on the forum, but if I can I will.Thanks,Carlos

author: bob91343
author_rank: Super Contributor
timestamp: October 07, 2020, 06:43:12 pm
content: I may be a bit impertinent here but I would suggest doing some studying and experimenting. As has been often said, if you want something done right, do it yourself. The corollary to this is that you know how it works and can take care of it in the long run. Otherwise you are at the mercy of someone else's proclivitites.

author: carlosinseattle
author_rank: Contributor
timestamp: October 08, 2020, 03:45:16 am
content: Quote from: bob91343 on October 07, 2020, 06:43:12 pmI'm with you. But I know when I'm in over my head. My guess is that when one of you guys see it you'll be able to solve it in no time.
Can someone build an electronic circuit for me, I have the schematic? - Page 1
Forum section: electronics / projects

author: carlosinseattle
author_rank: Contributor
timestamp: May 07, 2020, 06:08:39 pm
content: I've admired the technical expertise of members of this forum for awhile, the more I read the more I realize what I don't know.I'd like to find someone who can build a circuit for a slot car project. I have the schematic and pictures of the actual unit built by someone else but need someone to build it for me. Where should I post this type of project on this forum?Thanks

author: Dave
author_rank: Super Contributor
timestamp: May 07, 2020, 09:41:27 pm
content: Here.

author: JagV12
author_rank: Contributor
timestamp: May 08, 2020, 07:22:40 am
content: If you don't want to hire someone, maybe you should just post your files here and ask for goodwill...

author: carlosinseattle
author_rank: Contributor
timestamp: May 09, 2020, 04:08:34 am
content: Thanks guys. One member sent me a PM, but I found someone local who agreed to build it. Wish me luck
Can someone explain the price of this component??? - Page 1
Forum section: electronics / projects

author: 8086
author_rank: Super Contributor
timestamp: November 29, 2011, 03:23:10 am
content: http://uk.farnell.com/analog-devices/adxl206hdz/accelerometer-dual-axis-imems-8sbdip/dp/1903661?in_merch=New%20Products&in_merch=Featured%20New%20Products&MER=i-9b10-00002068£852.54??!!!!!

author: joelby
author_rank: Frequent Contributor
timestamp: November 29, 2011, 03:27:20 am
content: Looks like it's designed for specialised and industrial applications - it has an extended high temperature range, etc.Still, it's pretty expensive! It's part of Analog's sample program though

author: metalphreak
author_rank: Frequent Contributor
timestamp: November 29, 2011, 03:29:46 am
content: http://www.findchips.com/avail?part=ADXL206HDZExpensive everywhere! I sometimes find farnell/element14 have whacky prices on some things that are far cheaper elsewhere but I guess not in this case.

author: Psi
author_rank: Super Contributor
timestamp: November 29, 2011, 04:10:40 am
content: It's probably something that's still needed for some obscure piece of equipment and manufactured in very low quantity just for that product.You can quite often get this sort of thing in the medical or aerospace industry where you can't just swap to a newer/cheaper part without needing to spend hundreds of thousands of dollars getting the whole product recertified.And, as joelby said, it has a really wide temp range, so its quite a specialized part.
Can someone explain this (amplifier) grounding arrangement? - Page 1
Forum section: electronics / projects

author: 6SN7WGTB
author_rank: Regular Contributor
timestamp: March 10, 2024, 08:25:51 am
content: There are a pair of phonos on the chassis admitting L and R audio from the preamp.The ground of these phonos is firmly grounded to the chassis (metal bodies phonos, metal chassis).A ground tag is on each phono, the tags linked by a wire.Each phono has a signal wire plus a ground wire running to the PCB some 200mm/8" away. These form a tightly twisted pair, with the signal wire running to the signal in point. The ground wire is however unterminated, aside some insulating heatshrink. FWIW, the signal in points are close together for the two channels.A fifth wire runs from the middle of the wire joining the ground tags to the ground connection on the PCB between the two signal inputs.The ground plane of the amplifier has a 5Ω 100W resistor to chassis.I can understand (a) lifting audio from chassis grounds, (b) twisting pairs, (c) avoiding hum loops with single shield etc, but what is completely confusing me is what's the point of all this complexity given the phono socket grounds are bolted to the chassis at the very start of this?

author: moffy
author_rank: Super Contributor
timestamp: March 10, 2024, 08:54:47 am
content: Chassis often don't make very reliable conductors and can have voltages/currents induced by magnetic fields i.e. the transformer. A wire is a better way to connect grounds.

author: 6SN7WGTB
author_rank: Regular Contributor
timestamp: March 11, 2024, 08:14:58 am
content: Let me be more specific:1. If the designer chose to lift the audio ground from chassis ground via the 100Ω resistor, why are the phonos bolted to the chassis?2. Because they're bolted to the chassis the single wire that goes from the phono tags to the audio ground on the PCB now shorts out the 'lift' completely - why?3. Why run a twisted pair for each channel to the PCB, but not connect the ground? Yes to avoid loops if BOTH grounds are connected hence the single ground wire (forgetting the issue of 2 for a moment) - but why run the two unterminated ones?

author: moffy
author_rank: Super Contributor
timestamp: March 11, 2024, 08:35:21 am
content: I really can't speak for another designer's choices, I can't even say that they are good but often it is a case of if it works, it works, unless you have some underlying noise or hum issue.
Can someone explain this to me? - Page 1
Forum section: electronics / projects

author: WillHuang
author_rank: Contributor
timestamp: April 22, 2016, 04:08:31 am
content: I was attempting to interface a RFID badge reader to a microcontroller in order to get the badge ID number. To do this, I had to connect the DATA0 and DATA1 lines of the badge reader to the input pin of the microcontroller. The DATA0 and DATA1 lines are normally held high and they go low to indicate a binary 0 (DATA0) or 1 (DATA1).Now, if I were to connect the two lines directly to the microcontroller, my readings would be inaccurate 40% of the time. However, if I were to stick a resistor inbetween the input pin and DATA lines, my readings are accurate 100% of the time. I don't quite understand what's going on here. I've googled around a little bit, and the most I could get out of was 'reflection' on the transmission line - which sorts of make sense to me.Was hoping someone here would know more and could explain it a little more too.Thanks!

author: ElektroQuark
author_rank: Unknown
timestamp: April 22, 2016, 11:28:09 am
content: Quote from: WillHuang onTodayat 04:08:31By whom? The reader? Or are some pullup resistors needed?

author: rrinker
author_rank: Super Contributor
timestamp: April 22, 2016, 02:08:01 pm
content: Sure sounds like the latter. Would explain the odd results - they go low just fine, but are expected to have pullup resistors to be pulled high, otherwise they just float and you get unexpected results.
Can someone help me with TI UAF42, programmable active filter? - Page 1
Forum section: electronics / projects

author: rwgast_lowlevellogicdesin
author_rank: Frequent Contributor
timestamp: November 21, 2015, 07:26:59 pm
content: I just got one of these guys pretty pricey but I am having a hard time understanding the datasheethttp://www.ti.com/lit/ds/symlink/uaf42.pdfBasically I am just wondering what the usable frequency range of this thing is, the only thing I see in there is noise = nv times the square root of hertz or something. Basically Im just looking for some piratical information. Can this be used for RF? I mean if I wanted a programmable antenna filtering front end would this part work? Or how about something like LO/IF filtering? I guess im just really trying to figure out what the frequency limits of this thing is. :/ this is kind of an exotic part I hope someone knows a little bit about it

author: hendorog
author_rank: Super Contributor
timestamp: November 21, 2015, 08:28:47 pm
content: Frequency range is 0-100 kHz according to the datasheet.Top item in the table under "Electrical Characteristics"
Can someone identify this 4 pin connector? - Page 1
Forum section: electronics / projects

author: AndersJ
author_rank: Frequent Contributor
timestamp: February 02, 2020, 11:18:14 am
content: Any ideas of what connector this might be?

author: moffy
author_rank: Super Contributor
timestamp: February 02, 2020, 11:53:38 am
content: The nearest I could find is:www.conrad.comHirose Electronic HR10A-7P-4P . It's not identical but close in shape, don't know about size. The connector looks like something for audio.
Can someone identify this connector? - Page 1
Forum section: electronics / projects

author: AndersJ
author_rank: Frequent Contributor
timestamp: October 06, 2021, 01:11:31 pm
content: What connector family and type is this?

author: TheMG
author_rank: Frequent Contributor
timestamp: October 06, 2021, 01:32:47 pm
content: I often hear then referred to as "Cannon" connectors. Often used in military and aerospace applications.They exist in an almost infinite number of different configurations for the pinout and keying, and come with either solder or crimp pins and in either threaded or bayonet style coupling.There will be a part number stamped somewhere on it.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: October 07, 2021, 03:57:46 am
content: Nearly sure due to the uncommon configuration of the bayonet lock:VG95234 cylindrical reverse bayonet coupling, probably pinout 16S-1 (7 #16 contacts).Made by Souriau, Glenair, ITT Cannon, Amphenol Air-LB..Based on a German adaption of the threaded Mil-C-5015 connectors, therefore the 'VG' designation.AFAIK there is a British adaption of it. There is some lettering just visible on the locknut. If you post that, I could verify this info.

author: AndersJ
author_rank: Frequent Contributor
timestamp: October 07, 2021, 11:13:27 am
content: Thanks for the very extensive reply.I’ll get back to you about the hopefully visible letteringas soon as I have access to the cable again.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: October 07, 2021, 08:18:05 pm
content: Also helpful would be to take some mechanical measurements, especially of the connector front side.

author: AndersJ
author_rank: Frequent Contributor
timestamp: October 08, 2021, 07:32:45 am
content: Text stamped on connector rotating part:“7923 CANNON-G CA3106E16S-1P-B-F80This answers the original question, didn’t see it first time…Connector is 7-poleAttaching pictures with rough dimensions and mating chassis connector.

author: Terry Bites
author_rank: Super Contributor
timestamp: October 08, 2021, 02:13:48 pm
content: Usually a "Cannon" is an XLR of some sort. This is is a "circular connector". Its probably from Ampehnol:https://www.google.co.uk/search?q=ampeencol+circular+connector+bayonet&tbm=isch&ved=2ahUKEwiAtpKl_7rzAhUHLxoKHaoaA54Q2-cCegQIABAA&oq=ampeencol+circular+connector+bayonet&gs_lcp=CgNpbWcQA1CvhwVY1JoFYJicBWgAcAB4AIABqwGIAdkJkgEDMC44mAEAoAEBqgELZ3dzLXdpei1pbWfAAQE&sclient=img&ei=kVFgYcCpJ4feaKq1jPAJ&bih=999&biw=2048

author: EPAIII
author_rank: Super Contributor
timestamp: October 09, 2021, 08:59:38 am
content: Yes, I have never heard them called "Cannon". Start your search with Amphenol, circular, and Mil Spec.Quote from: Terry Bites on October 08, 2021, 02:13:48 pm

author: dave_k
author_rank: Frequent Contributor
timestamp: October 09, 2021, 10:19:12 am
content: Lotsa useful information here:https://www.ittcannon.com/Core/medialibrary/ITTCannon/website/Literature/Catalogs-Brochures/ITT-Cannon-CA-Bayonet-Catalog.pdf?ext=.pdf
Can someone identify this mains power connector? - Page 1
Forum section: electronics / projects

author: krivx
author_rank: Frequent Contributor
timestamp: November 27, 2012, 02:48:50 pm
content: I have a Systron Donner 6152 frequency counter with a missing power cable. I don't recognize the connector and I can't find a manual online. Does this look familiar to anyone?

author: PA0PBZ
author_rank: Super Contributor
timestamp: November 27, 2012, 03:17:32 pm
content: How old it this thing? It looks like something we had on vacuum cleaners in the sixties...

author: krivx
author_rank: Frequent Contributor
timestamp: November 27, 2012, 03:28:15 pm
content: I don't know the age. It has a nixie display, so I'm guessing it predates the era of ubiquitous 7-segment LEDs.

author: ModemHead
author_rank: Frequent Contributor
timestamp: November 27, 2012, 04:09:38 pm
content: Looks like what is generally referred to as an "HP Oval" power connector.

author: ElectronicTonic
author_rank: Contributor
timestamp: November 27, 2012, 04:23:12 pm
content: According to this, it is PH-163, an obsolete predecessor to the IEC C13/C14.http://www.cs.ubc.ca/~hilpert/e/powerConn/index.html

author: krivx
author_rank: Frequent Contributor
timestamp: November 27, 2012, 04:37:08 pm
content: It looks like PH163 might be correct, and power cables are still manufactured (http://ie.mouser.com/ProductDetail/Volex/17280-8-B1/?qs=sGAEpiMZZMvl4Mm6MN%2fmBA9VsUl9Nkt%252bgJ8iZpIHtaw%3d). Unfortunately I want one with a BS1363 plug and rated for 240V.

author: G7PSK
author_rank: Super Contributor
timestamp: November 27, 2012, 07:26:19 pm
content: Looks like the connectors used by the early Swan electric kettles. I have also seen it used on Electroluxe products.

author: Excavatoree
author_rank: Frequent Contributor
timestamp: November 27, 2012, 10:17:42 pm
content: I has a similar connector on a power supply I bought as surplus. I powered it with alligator clips for a while, then broke down and replaced it with a standard connector.

author: krivx
author_rank: Frequent Contributor
timestamp: November 29, 2012, 04:42:43 pm
content: Quote from: Excavatoree on November 27, 2012, 10:17:42 pmI think I might have to do this. I have some spare IEC connectors somewhere, it just looks like it would be a tight fit. The alternative is to buy the US power cable and use it with my stepdown transformer but I just don't want the hassle.
Can someone identify this Toko RCL component - Page 1
Forum section: electronics / projects

author: AndersJ
author_rank: Frequent Contributor
timestamp: August 03, 2017, 10:28:13 am
content: I can't find data for this Toko RCL (transformer?)Can anyone help?

author: DaJMasta
author_rank: Super Contributor
timestamp: August 03, 2017, 04:01:18 pm
content: Looks like a variable inductor, in fact, I've got a somewhat similar looking one in my parts box.Toko was bought by Murata, and I think those tabs you can see are for the housing, and aren't electrically connected (so there's be 2 pins coming from outside of the housing. Couldn't find any info on a cursory glance on those printed numbers, but if you have an LCR meter, you can probably learn most of what you need.

author: chris_leyson
author_rank: Super Contributor
timestamp: August 03, 2017, 04:41:54 pm
content: The part marking is 40292 and the date code is 83433. In general the part marking is not related to the part number, for example I've got some 5mm 5PA parts fitted to a board marked 0876 date code 9278 but can't find them in the 1996 catalogue.Looks like a 10mm part from the photograph and as the adjustment slug is internal it probably from the 10K series. 10EZ series has an outer adjustment slug and the 10PA series has a screening can with a rounded top. Looking in the 1996 shortform catalogue and there is nothing even close to 40292. Shame to see the loss of Toko RCL they made some really nice coils and filters.
Can someone please tell me how does this tab switcher works from hp? - Page 1
Forum section: electronics / projects

author: Farrow
author_rank: Contributor
timestamp: February 18, 2023, 11:09:13 am
content: This is from the hp e3631 power supply schematic but I've removed all the unnecessary components to focus on the tab-switching mechanism.What I think is happening:When the triac (Q10) is off, tabs 5 and 6 go through cr29 as usual. And when triac is on, tabs 4 and 6 go through diodes 3, 4, 5, and 6 effectively bypassing the centre tap and its accompanying 1 and 2 diodes.I could be totally wrong but hey at least I tried
Crimped pins soldered to the board? - Page 1
Forum section: electronics / projects

author: fabiodl
author_rank: Frequent Contributor
timestamp: January 21, 2020, 02:15:51 pm
content: This "connector" has crimped pins which are directly soldered to the board.Does someone know it? The pitch appears to be 3.96mm (it's slightly less than 4mm)

author: fabiodl
author_rank: Frequent Contributor
timestamp: January 23, 2020, 08:00:30 am
content: If it may help, the other connectors used seem to be JST. the cable is terminated by a JST vh, and another connector on the board is a JST XH
Can someone sanity check my SlimSata and Msata footprints? - Page 1
Forum section: electronics / projects

author: senso
author_rank: Frequent Contributor
timestamp: July 03, 2015, 11:11:34 am
content: Good morning, as the tittle says I'm designing a slimsata(ODD connector) to msata pcb for my laptop and I'm a bit reticent to keep designing before confirming that my footprints are really correct, the Msata symbol/footprint barring any error was made looking to the Msata Intel Pinout, the Slimsata was made by looking at laptop schematics and boardview files.Pinout for Msata:Msata symbol:Slimsata/ODD symbol:Best regards.
Can STM32 MCU SPI master clock frequency be 'odd' number - Page 1
Forum section: electronics / projects

author: Wilson__
author_rank: Frequent Contributor
timestamp: May 17, 2024, 10:29:28 am
content: Can STM32 SPI frequency be a random number, like 12,345,678Hz (subject to rounding resolution of the prescaler divider N)?To optimizehighest transfer speed between MCU and sensor, finish the task and back tosleepfor minimum cell energy.Presumably, we canramp up SPI speeduntil error, then,scale back nnn%for margin.Many thanks

author: moffy
author_rank: Super Contributor
timestamp: May 17, 2024, 10:51:41 am
content: Since it is the Master that provides the bit clock it can, within reason, be whatever you like as long as timing constraints are adhered to and the Slave devices can run at that clock.

author: pcprogrammer
author_rank: Super Contributor
timestamp: May 17, 2024, 11:00:50 am
content: It depends on the main clock, the SPI baud rate control settings and the MCU in use, but within these parameters it can be whatever you like.

author: S. Petrukhin
author_rank: Super Contributor
timestamp: May 17, 2024, 11:34:41 am
content: The correct solution is to choose frequency that sensor datasheet suggests.You can take risks - this will not lead to failure, there will just be a loss of communication or errors.In STM32, the CLK frequency in SPI is specified as a divider, you cannot select the frequency, but you can turn the SysCLK.
Can the BC127 Bluetooth audio module be used as a master? - Page 1
Forum section: electronics / projects

author: vini_i
author_rank: Regular Contributor
timestamp: October 16, 2016, 12:03:36 pm
content: I want to send audio to a set of Bluetooth head phones. Can the BC127 work in such a fashion?I'm thinking that audio can be input where the mic inputs are but i don't know if the BC127 can act as a master and have other devices connect to it.
Can the SN74HC595 be daisy chained with the MIC5891? - Page 1
Forum section: electronics / projects

author: WarFreak131
author_rank: Contributor
timestamp: March 20, 2021, 05:37:15 pm
content: I have a project where I have three shift registers. The first two are SN74HC595s.https://www.ti.com/lit/ds/symlink/sn74hc595.pdfThey will be operating on components that can run on 5V logic. The third is a MIC5891, which is a combination high-side latch and shift register.https://ww1.microchip.com/downloads/en/DeviceDoc/20005638A.pdfThe pinouts on both are different, so I'm trying to figure out how to get the two to mesh, mainly having them operate on the same clock signals.For the 595, my typical application is usually keeping OE tied low, and SRCLR tied high. For the MIC5891, it doesn't have an SRCLR so I can't do anything with that. It does have an OE, so that would be tied low as well. Both have a serial in and serial out, so that's pretty simple.My question is making sure that RCLK and SRCLK are correctly tied to CLOCK and STROBE on the MIC5891, or if that's even possible since they're two different chips. From the tutorial I found onhttps://lastminuteengineers.com/74hc595-shift-register-arduino-tutorial/amp/,it looks like SRCLK on the 595 is analogous to CLOCK on the 5891, and RCLK on the 595 is analogous to STROBE on the 5891. Does this sound correct?

author: Benta
author_rank: Super Contributor
timestamp: March 20, 2021, 07:35:55 pm
content: Your connection idea is correct, but you'll have to check if SPI clock phase and mode are the same (compare the timing diagrams).

author: Kleinstein
author_rank: Super Contributor
timestamp: March 20, 2021, 09:26:39 pm
content: The data hold time does not look compatible. So one may have to change the HC595 to a HC4094. This give both the HC595 and slower option.Edit: It could be OK to have first the MOC5891 and than the HC595.

author: WarFreak131
author_rank: Contributor
timestamp: March 22, 2021, 12:58:46 am
content: Thank you both for the responses. To rule out the possibility of them being incompatible, I just opted to put them on different signal lines.
can this FET preamp work on 9V? - Page 1
Forum section: electronics / projects

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: October 24, 2019, 01:25:03 am
content: so I found this schematic for a fantastic sounding FET preamp and I want to power it from a 9 volt.can this be done whit changing some resistors of different FETs?[ Attachment Invalid Or Does Not Exist ]

author: 001
author_rank: Super Contributor
timestamp: October 24, 2019, 02:04:36 pm
content: I see russian or greek (?) letters hereOld russian components are exotic so it is reason to avoid this schematic

author: 001
author_rank: Super Contributor
timestamp: October 24, 2019, 02:19:01 pm
content: Quote from: ELS122 on October 24, 2019, 02:13:45 pmWhy not to connect old local EEs?

author: 001
author_rank: Super Contributor
timestamp: October 24, 2019, 03:24:02 pm
content: Quote from: ELS122 on October 24, 2019, 02:30:59 pmEE is for electrical engineerAnd You at eevblog now...

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 24, 2019, 03:29:44 pm
content: Have you taken a look here:https://www.diystompboxes.com/smfforum/index.php?topic=83787.0

author: schmitt trigger
author_rank: Super Contributor
timestamp: October 24, 2019, 03:50:11 pm
content: I see several totem pole connected JFETs.Additionally, without the JFET datasheet, it is impossible to determine the required Vgs biasing, but most certainly will be several volts.With the minimum information provided, I would say it would be difficult to bias it correctly with only a 9v supply.Do you want to power it up from batteries for portability? Why not use a boost converter? There many available at Ebay for a couple of Euros.I know, they are noisy.....but you can always add lots of post filtering.Now, if a boost converter is not an option, why not use a pair of A23 batteries? A little thicker than an AA, but 12 volts.

author: Kleinstein
author_rank: Super Contributor
timestamp: October 24, 2019, 04:25:04 pm
content: I don't see a real need for a high supply voltage. It may need different (lower threshold) JFETs for low voltage. I would suggest a simulation in something like LTSPICE. With suitable FETs it could even run at 3 V or so. The DC level could also depends on the FET matching. The circuit is 3 stages that could be looked at separately, and the 1 st 2 stages are the same type. The output stage is just a source follower with current sink and thus relatively non critical.The amplifier works without direct feedback. So the sound could be a little tube like with well measurable distortion.

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 24, 2019, 05:50:55 pm
content: I guess you could replace the JEFTs with the more common J201, especially if you want it to work properly at lower voltages. You will probably have to adjust many of the resistors' values though.LTSpice has a model for it, so you can start simulating a bit before building the preamp.
Can this Noctua 12v Fan be fixed? - MOVED TO REPAIR - Page 1
Forum section: electronics / projects

author: enut11
author_rank: Super Contributor
timestamp: July 30, 2024, 05:21:30 am
content: EDIT: Sorry, but I posted this in the wrong section. Moved to 'Repair'?

author: moffy
author_rank: Super Contributor
timestamp: July 30, 2024, 08:34:45 am
content: Perhaps something similar to:https://offer-product.oss-cn-beijing.aliyuncs.com/product/offer/attachment/2206374649566/file/subPdf_774009_342167_20240315-180902984.pdf

author: RoGeorge
author_rank: Super Contributor
timestamp: July 30, 2024, 08:57:46 am
content: Quote from: enut11 on July 30, 2024, 05:21:30 amJust so you know for the future, there is a "MOVE TOPIC" button at the bottom of the page. One can move own topics into another forum section.
Can this switched capacitor inverter sink current (LM2687) - Page 1
Forum section: electronics / projects

author: palpurul
author_rank: Regular Contributor
timestamp: March 28, 2018, 12:33:30 pm
content: Hello guys,I was looking for a way to generate negative voltages to supply opamp and I found this nice chip from TI link:http://www.ti.com/product/LM2687. One thing in the datasheet caught my eye is that Vout (negative voltage output) is connected to the N-MOSFET's source (image attached). As I said I'm going to use that chip to bias the opamps's negative supply pin, so it has to sink current. How can it do that with this configuration at the output?

author: ogden
author_rank: Super Contributor
timestamp: March 28, 2018, 12:48:18 pm
content: Quote from: palpurul on March 28, 2018, 12:33:30 pmParticular IC is negative voltage inverter with LDO. I don't know what you mean by saying "I'm going to use that chip to bias the opamps's negative supply pin, so it has to sink current", but this IC is ok for negative rail of opamp in case bipolar supply for opamp needed.

author: palpurul
author_rank: Regular Contributor
timestamp: March 28, 2018, 12:59:28 pm
content: Thanks for your response ogden.Quote from: ogden on March 28, 2018, 12:48:18 pmLet me clarify. The current must flow into the Vout pin of LM2687 and this pin is connected to the source of the NMOS inside the chip. My understanding is that the current flows from drain to source in NMOS transistors not the other way around. When LM2687 is sinking, current must flow from source to drain. That's what I was trying to say. What am I missing here?

author: ogden
author_rank: Super Contributor
timestamp: March 28, 2018, 01:23:59 pm
content: Quote from: palpurul on March 28, 2018, 12:59:28 pmCurrent flows *into* output. This is how every negative supply works. No problem here.QuoteYes you are right and your question is valid. Anyway - If regulator says it is for negative voltage then you shall rely on this information disregarding how mosftet is shown in it's internal circuitillustrationwhich definitely is far from actual circuit.  - Because NMOS you know, may differ from MOS which is used internally in that particular IC. Just accept that it works and proceed further with your project

author: palpurul
author_rank: Regular Contributor
timestamp: March 28, 2018, 02:01:15 pm
content: Quote from: ogden on March 28, 2018, 01:23:59 pmYea, common sense. The schematic they provided is still confusing.Thanks for the help!
CAN time-triggered communication mode not supported in STM32 - Page 1
Forum section: electronics / projects

author: Red_Micro
author_rank: Regular Contributor
timestamp: April 28, 2021, 10:30:25 pm
content: I have noticed the many of the STM32 microcontrollers do not support TTCAN. Even if it's specified in the reference manual, the errata sheet says it's not supported.An example here.Has anyone needed to use this mode? If so, what was your workaround?
Can we control both the maximum voltage and the minimum voltage using three POT - Page 1
Forum section: electronics / projects

author: ajoseph88
author_rank: Contributor
timestamp: October 21, 2015, 05:30:38 pm
content: Using three trimmer POT, can we control both the maximum voltage and the minimum voltage.Say, the input voltage is 5v, and one POT is for controlling the max voltage, one POT is to control the minimum voltage and the final pot is to change the output, so that output varies from (min to max values set by the POT's).

author: unitedatoms
author_rank: Frequent Contributor
timestamp: October 21, 2015, 05:32:37 pm
content: Yes. You can arrange them into H-bridge and get exactly what you describe

author: ajoseph88
author_rank: Contributor
timestamp: October 21, 2015, 07:30:13 pm
content: Yeah... I finally made it worked... problem was one of the POT was bad....

author: unitedatoms
author_rank: Frequent Contributor
timestamp: October 21, 2015, 08:41:06 pm
content: Quote from: ajoseph88 on October 21, 2015, 07:30:13 pmHa ha glad you found good POT. We are talking about potentiometers, I hope.
Can we talk Infiniband links and cables? - Page 1
Forum section: electronics / projects

author: cvanc
author_rank: Frequent Contributor
timestamp: September 05, 2018, 09:20:18 pm
content: Disclaimer:I am no expert when it comes to this, plus I'm trying to fix this fault remotely so I may not have all the facts.Background:Got a failed optical Infiniband link at a site. Wondering about replacing it with copper as I don't need a long run.Details:Workstation card is a Mellanox MHES14-XTC (10Gb/s speed, which I think is called '4X Infiniband', right?).The current (failed) link is a fiber with an Emcore copper-to-optical converter module at each end (I think they are QTR3432).The actual fiber is MJ3MM12RPR-25-1 from Fiber Connections.I need to go 5, maybe 7, meters.Questions:1) Swapping in a copper replacement should be plug-n-play, right?2) Any comments on brands to buy (or avoid)?3) This stuff is pretty obsolete, right? Am I best scoring something off eBay, or do some distributors still have new inventory?Many thanks for your help, it's much appreciated.

author: borjam
author_rank: Unknown
timestamp: September 06, 2018, 07:10:12 am
content: You can use CX4 cables, with a maximum length of 15 m.Cheaper than fibre and with a much lower power consumption.
Can you bake PTH components with topside paste? - Page 1
Forum section: electronics / projects

author: alank2
author_rank: Super Contributor
timestamp: September 12, 2013, 08:45:22 pm
content: Hi Everyone,I'm thinking of getting a toaster oven to do some smd baking and converting some of my pcbs from the all pth design that they are now to as much smd as possible. My question is for some components that are only available in pth, or are less expensive in pth, can you possible paste and bake them too? If you get a large enough paste on the pad, will it work?ThanksAlan

author: Corporate666
author_rank: Unknown
timestamp: September 12, 2013, 09:23:21 pm
content: Quote from: alank2 on September 12, 2013, 08:45:22 pmTried it, doesn't work.First, really no way to get enough paste onto the pad.Second, many of the components are not made from the correct epoxy/materials to survive reflow. There is a lot more heat and stress on the package from reflow soldering than simply soldering the legs of a PTH component.

author: marshallh
author_rank: Unknown
timestamp: September 12, 2013, 09:28:55 pm
content: Pin in hole reflow, read thishttp://www.smartgroup.org/wp-content/uploads/PinInHoleReflow.pdf
Can you connect 3.3V CANH and CANL to 5V system? - Page 1
Forum section: electronics / projects

author: aiq25
author_rank: Regular Contributor
timestamp: March 16, 2015, 05:25:14 am
content: Hi. I'm looking to use a Freescale freedom board and they have a 3.3V system with 3.3V CAN transceivers. I'm fairly new to CAN. So I was wondering can I connect the 3.3V lines to a 5V system? I have a USB-to-CAN device I would like to use and that has a 5V system.My thoughts: You should be able to connect the 3.3V system with the 5V system since CAN is a differential system.

author: Niklas
author_rank: Frequent Contributor
timestamp: March 16, 2015, 06:54:58 am
content: Yes, you can connect them
[SOLVED!] Can you download me the datasheet pls? Samsung - Page 1
Forum section: electronics / projects

author: Yansi
author_rank: Super Contributor
timestamp: April 26, 2016, 07:27:26 pm
content: My friend has this samsung panel... but the datasheet nowhere to be found. Samsung lt141x4-156Until this showed up:http://www.rcgroups.com/forums/showthread.php?t=2202605&page=54But what the f? Although the thread is about two months old, the yesyesyes server with its idiotic name doesn't work, at least here. Can somebody please try to download it or was the server really trashed? The only server with the PDF... Damn internet...http://yesyesserver.co.uk/display/141x4_156-pin.pdfThank you very much!Yan

author: cowana
author_rank: Frequent Contributor
timestamp: April 26, 2016, 07:35:28 pm
content: Is the cached version any use? Looks like a sparse datasheet!http://webcache.googleusercontent.com/search?q=cache:wV1WC6NGGCQJ:yesyesserver.co.uk/display/141x4_156-pin.pdf+&cd=1&hl=en&ct=clnk&gl=uk

author: hendorog
author_rank: Super Contributor
timestamp: April 26, 2016, 07:37:01 pm
content: The server was down for me too, but you can see the datasheet (without any images) by doing this:Enter this into google:141x4_156-pin.pdfThen click on the tiny down arrow next to the Green URL in the yesyesserver.co.uk result.Select 'Cached'That will show the copy of the pdf google has cached - which seems to at least show the pinout.

author: kripton2035
author_rank: Super Contributor
timestamp: April 26, 2016, 08:00:58 pm
content: also in the web archive :http://web.archive.org/web/20131228145530/http://yesyesserver.co.uk/display/141x4_156-pin.pdfbut yes this is a very sparse datasheet...

author: Yansi
author_rank: Super Contributor
timestamp: April 26, 2016, 08:24:13 pm
content: Awww yea... didn't know about google providing cached files! Thanks!!The pinout it almost enough, as other parameters I have already found scattered throughout the web.Thank you for help!Yan