hybridfree/eevblog-posts huggingface dataset:
Where do I get this 7 pin rubber din connector? - Page 1
Forum section: electronics / projects

author: daslolo
author_rank: Regular Contributor
timestamp: August 13, 2018, 09:25:33 am
content: I am interfacing an MCU to Melnor sprinkler valves and I would like to keep intact the female connector attached to the valves so I need to use matching male connectors. Unfortunately I have not been able to find them anywhere on the web.They are 14mm in diameter, made of rubber which creates a seal with the female din plug. Here are photos near a ruler. I hope someone will be able to point me to a manufacturer.

author: Kjelt
author_rank: Super Contributor
timestamp: August 13, 2018, 10:54:54 am
content: Good luck finding those exact connectors, IME those are often standard layout connectors but then put in a proprietary mold for the rubber seal/housing. Each company his own to keep out clones or competition, like Gardena does with its system.You might find the connector pinout for the contra but the fitting rubber housing is a different story.I once had such an issue with outdoor lighting system, after a half year search I ended up replacing all the connectors with IP67 or IP68 proof connectors, not cheap but available.Example:https://uk.rs-online.com/web/p/industrial-automation-circular-connectors/7345133/IP code explanation:https://en.wikipedia.org/wiki/IP_Code

author: daslolo
author_rank: Regular Contributor
timestamp: August 14, 2018, 06:26:44 am
content: Oh brother, I didn't think about the proprietary mold, you're probably right.I could try a cheap 7 pin din or the pin base without the sleeve, put a rubberband around it to hold it in place, tie it in a knot so pulling on it won't dislodge it and finally water proof the whole jerry rig with silicone.I think it's an M12, 12 stands for 12 mm, 1mm extra for the sleeve, right?Is there a similar site with super cheap din connectors, one with a filter that's as good?

author: Kjelt
author_rank: Super Contributor
timestamp: August 14, 2018, 06:50:34 am
content: Super cheap ? Then I would try aliexpress and sorts first, if you are lucky this company made them in PRoC or surroundings and they made extra for themselves. Smal chance but even if it indeed is M12 you can find cheap versions there to try your experiments. Only the waiting time is sometimes problematic.
Where do the rise time in 8/20 and 10/1000 waveforms come from? - Page 1
Forum section: electronics / projects

author: incf
author_rank: Frequent Contributor
timestamp: April 28, 2025, 07:18:55 pm
content: How did they choose 8us and 10us rise times for the popular 8/20 and 10/1000 transient waveforms?It is just a number that happens to be easy to generate with test equipment?It seems to me that many power busses probably have local transients with significantly faster rise times than 8us due to inductance of long power cabling and fast switching times of high-side FET driven loads, or opening of fuses.https://electronics.stackexchange.com/questions/334458/why-are-different-currents-through-the-tvs-diode-or-8-20-us-and-10-1000-ushttps://electronics.stackexchange.com/questions/66776/what-does-8-x-20-%C2%B5s-and-10-x-1000-%C2%B5s-mean-in-surge-testing-terminologyEdit: Sometimes it is claimed to apply to lightening, other times to switching transients in power buses. Is there a comprehensive list of common transient overvoltage/induced current waveforms somewhere?

author: PGPG
author_rank: Frequent Contributor
timestamp: April 29, 2025, 12:25:03 am
content: Quote from: incf on April 28, 2025, 07:18:55 pmThese rise times are certainly not just the easiest to generate.Quote from: incf on April 28, 2025, 07:18:55 pmIn EMC standards the first are so called Surge, the second are rather called Burst.There are also ESD pulses. When people had equipment that could 'see' 5ns slope they assumed ESD has 5ns rise time. When we get possibility to see 1ns slope we assume ESD has 1ns rise time. Now it looks that ESD rise time should be specified as being even faster.There are separate standards for testing resistance to each of them.Rise time of each test pulses are just specified to make measurements repeatable/comparable and they are probably an average of many practically observed impulses that actually occur.
Where I can Buy 0,1 0,01 0,005% resistors? Internet  - Page 1
Forum section: electronics / projects

author: 001
author_rank: Super Contributor
timestamp: September 05, 2018, 05:42:40 am
content: Where I can Buy 0,1 0,01 0,005% resistors for voltage divider 100:10:1? In internetIs china or russian resistor ok?

author: mitrynicolae
author_rank: Contributor
timestamp: September 05, 2018, 05:50:59 am
content: For the 0.1% you can try:https://www.tme.eu/ro/katalog/elemente-pasive_112309/#id_category=100299&s_field=artykul&s_order=ASC&visible_params=2%2C34%2C51%2C111%2C38%2C36%2C39%2C10%2C45%2C32%2C44%2C2932%2C2931%2C42%2C46%2C117%2C43&used_params=39%3A351674%3B

author: GadgetBoy
author_rank: Regular Contributor
timestamp: September 05, 2018, 06:26:07 am
content: Mouser.comSent from my ONEPLUS A3000 using Tapatalk

author: 001
author_rank: Super Contributor
timestamp: September 05, 2018, 06:53:09 am
content: Thanx a lot!I also looking for matrix dividers like CADDOCKAny NOS sellers?

author: RobK_NL
author_rank: Frequent Contributor
timestamp: September 05, 2018, 07:00:09 am
content: "matrix divider"?You meansomething like this?

author: 001
author_rank: Super Contributor
timestamp: September 05, 2018, 07:06:56 am
content: Quote from: RobK_NL on September 05, 2018, 07:00:09 amYea ThanxAll what I need is 100:10:1 divider 10M or more

author: Alex Nikitin
author_rank: Super Contributor
timestamp: September 05, 2018, 08:20:32 am
content: Quote from: 001 on September 05, 2018, 05:42:40 amFor decade ratios you better have a look at theHamon divider.CheersAlex

author: ebclr
author_rank: Super Contributor
timestamp: September 05, 2018, 04:23:38 pm
content: https://www.digikey.com/products/en/resistors/resistor-networks-arrays/50?k=&pkeyword=&pv2293=3&pv2294=2&FV=ffe00032%2Cc0123&quantity=0&ColumnSort=0&page=1&pageSize=25

author: Wolfgang
author_rank: Super Contributor
timestamp: September 05, 2018, 08:15:38 pm
content: Look here:http://www.vishaypg.com/foil-resistors/list/product-63146/and you already can start to fill up your wallet.

author: texaspyro
author_rank: Super Contributor
timestamp: September 06, 2018, 02:01:33 am
content: Quote from: Alex Nikitin on September 05, 2018, 08:20:32 amI prefer a Hamon cheese divider mounted on a rye breadboard with pickle posts and mustard based thermal compound...OK, I'll get my coat and slink off into the woodsy night...

author: GigaJoe
author_rank: Frequent Contributor
timestamp: September 06, 2018, 02:18:18 am
content: the cheapest way:https://www.eevblog.com/forum/metrology/voltage-dividers-111226/msg1523299/
Where is the "Euro Module" standard (50x25mm) defined? - Page 1
Forum section: electronics / projects

author: Lomax
author_rank: Frequent Contributor
timestamp: January 12, 2021, 08:13:10 pm
content: Wanted to take a closer look at this, but despite checking numerous datasheets for "Euro Mods" I've not been able to find a single mention of what standard it's based on. I mean the physical standard of the modules; the dimensions, snap-in mechanism, etc. Anyone know?

author: Benta
author_rank: Super Contributor
timestamp: January 12, 2021, 09:36:49 pm
content: It isn't defined anywhere.The standard is defined for 50 x 50 mm receptacles as used in many EU countries. Your 25 x 50 mm thing is apparently designed to be placed as pairs in one of those.It likely needs a special frame to clip into, as the normal 50 x 50 mm has a screw in the middle to hold the socket.Manufacturer special, I'd say.
Where is the power output on this board I can tap in. Pic - Page 1
Forum section: electronics / projects

author: dredd
author_rank: Contributor
timestamp: May 16, 2025, 11:51:11 am
content: Hihi!I'm making a case for an Intel X710 NIC, I will use it as external Thunderbolt NIC for my Mac. Parts:- NIC: Intel X710 2x SFP+ ports 10GBe NIC, PCIe 3.0https://www.dell.com/en-au/shop/intel-x710-dual-port-10gbe-sfp-adapter-pcie-full-height-v2/apd/540-bdrd/wifi-and-networking#techspecs_section- Thunderbolt to M.2 adapter Wavlink UTE02.https://www.wavlink.com/en_us/product/WL-UTE02.html- M.2 to PCIe x4 adapter. Generic, takes 4 pin power using floppy-like power connector.- Some generic USB-C HDD enclosure, takes USB-C, outputs SATA power, that goes to SATA power connector to 4-pin floppy-like connector cable, that feeds power to M.2 to PCIe x4 adapter.Mac ---> UTE02 ---> M.2 to PCIe (needs external 4-pin power) ---> X710If I build it like this, I'll expose two USB-C connectors: one for Thunderbolt, one for USB-C HDD enclosure PCB I need for power..Can I tap in some place in Wavlink UTE02 PCB to get the 5V to feed the USB-C enclosure PCB, to eliminate the need to expose generic USB-C enclosure's USB-C port? Maybe it just jumps at you, seeing the componentsThanks!

author: reboots
author_rank: Regular Contributor
timestamp: May 16, 2025, 03:57:52 pm
content: Try measuring across the large orange capacitor to the bottom right of the photo. Odds are good that you'll get 3.3V, but it's worth a shot.

author: dredd
author_rank: Contributor
timestamp: June 04, 2025, 12:43:02 pm
content: Quote from: reboots on May 16, 2025, 03:57:52 pmIt was 3.3vBut both sides of RB1, bottom left, big MFkr, print is R005, reads 5V on both ends. Now I need to see which end is coming from the USB-C connector.
WHERE: Small quantity of SMD resistor arrays - Page 1
Forum section: electronics / projects

author: SL4P
author_rank: Super Contributor
timestamp: April 11, 2014, 12:40:06 pm
content: Where do you guys purchase small quantities of isolated 8-pc resistor arrays in Australia?Looking for a couple of hundred of 51R and 68R 5% 1/8W SMD packs to populate prototype boards.What sort of pricing are you getting on these small volume?Thx
where to buy 27pin ribbon cable from molex - Page 1
Forum section: electronics / projects

author: roffelkartoffel
author_rank: Newbie
timestamp: October 27, 2021, 07:50:23 pm
content: lHi,currently I'm "developing" a mechanical keyboard wich should be driven by a Logitec multi device pcb salvaged from an old K375s board. The Logitech board uses plastic sheets as "pcb" and seems to be connected via a 27 pin, 1mm pitch Molex socket (https://octopart.com/200528-0270-molex-103216449looks fitting altough 1mm too wide (I think the footprint from Logitech aren't accurate for the outer dimensions)).I found ARROW as seemingly the only supplier for this socket wich has 32MOQ but thats a bullet I am able to swallow.Whats bugging me is that I am unable to find a distributor for the corresponding ribbon cable. Is this an outdated model or why is it impossible to find it?The cable I am looking for is Molex Premo-Flex.Or could buying a 30pin and slicing 3 lines off work?
Where to buy a (non-express) PCI straddle mount socket in 2023? - Page 1
Forum section: electronics / projects

author: blackbit
author_rank: Contributor
timestamp: October 17, 2023, 08:16:48 am
content: Subject says it all really.Explanation of 'straddle mount' in case that's unclear: The socket is supposed to be mounted on a card edge. Think PCI extender, which is kind of my usecase.I need such a connector for a small project and have spent way too much time searching for the part already.The usual suspects Digikey, Mouser, Farnell, etc. still list some of part numbers from back in the day, but everything is zero stock.Searches for obvious terms on eBay and whatnot came out dry as well.I need very low quantity, frankly even a single one would already be helpful.Options I've considered so far:Purchase a PCI extender of some sort off of eBay and desolder the socket. Possible but likely messy. So many pins...Beat a through-hole socket into submission. Possible but messy as well.I am quite sure there must be NOS on a shelf somewhere, I just can't find any to buy.Any pointers to NOS would be appreciated.

author: dmendesf
author_rank: Frequent Contributor
timestamp: October 17, 2023, 10:26:49 am
content: Like this?https://canada.newark.com/fr-CA/amp-te-connectivity/5145098-1/card-edge-conn-dual-side-120pos/dp/39Y8299If not a photo would help.

author: Someone
author_rank: Super Contributor
timestamp: October 17, 2023, 11:04:13 am
content: Right angle connector and/or flex PCB

author: blackbit
author_rank: Contributor
timestamp: October 17, 2023, 11:10:14 am
content: Nah, that's SMD.Let me find a photo of what I have in mind.

author: blackbit
author_rank: Contributor
timestamp: October 17, 2023, 11:21:38 am
content: Like this.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 17, 2023, 12:33:50 pm
content: yes its called pci extender ... you straddle term is confusing lollyou want the pci connector slotthe right terminology / name is : PCI Card Edge Connector - THT - 1.27mm pitchand now you get answershttps://www.mouser.com/c/connectors/card-edge-connectors/standard-card-edge-connectors/?pitch=1.27%20mm

author: blackbit
author_rank: Contributor
timestamp: October 17, 2023, 07:11:25 pm
content: Straddle mount describes the mounting style I am after. See screenshot below from Mouser, specificallyStandard Card Edge ConnectorsTHT connectors are different. They typically have alignment studs that get in the way, pin length and orientation that aren't ideal, etc. That's not really a surprise. A connector that is supposed to sit flat on a PCB needs to look different from one that is supposed to sit at the edge of a PCB.See what I've mentioned in my initial post:QuoteA THT part is a 'plan B'.

author: langwadt
author_rank: Super Contributor
timestamp: October 17, 2023, 07:47:29 pm
content: I don't think desoldering from something like this:https://www.ebay.com/itm/264360235639would be too hardjust start at one end, one pin at a time sliding something like a piece of paper under each pin as it's desoldered
Where to buy cheap matrix LCD for projects? - Page 1
Forum section: electronics / projects

author: Twistx77
author_rank: Regular Contributor
timestamp: October 01, 2014, 05:20:53 pm
content: Hi,I'm working in a project that I might want to sell later as open hardware and I need an LCD cheap enough because right know I have a protoype working with a Nokia 5110 LCD (https://www.sparkfun.com/products/10168) but I wan't something like that but more integrated to the PCB. I know I could buy only the LCD without the breakboard but I wan't something maybe easier to find than buying after alibaba.I've already checked in Mouser and Farnell but I couldn't find anything for less than 10$. I need it to be low power since my device will be battery powered.Any ideas?Thanks!

author: Ton
author_rank: Regular Contributor
timestamp: October 01, 2014, 07:42:38 pm
content: HiYou could try looking at thishttp://www.buydisplay.com/they have a lot of different sizes and colours for acceptable cost (but still based in China)Ton

author: Twistx77
author_rank: Regular Contributor
timestamp: October 02, 2014, 09:08:56 am
content: Thank you.Are they reliable? Do you have any experience with them?

author: andyturk
author_rank: Frequent Contributor
timestamp: October 02, 2014, 04:08:06 pm
content: Quote from: Twistx77 on October 02, 2014, 09:08:56 amYup. We bought some of their 1.3" OLED modules for an internal prototype project. They gave us a decent price based on the quantity and shipped exactly when they said they would.

author: Twistx77
author_rank: Regular Contributor
timestamp: October 02, 2014, 06:20:15 pm
content: Thanks.Do you know if the current consumption they claim is real? Are they low power?I will have to get some of those OLEDs and check them out. The problem is the time it will take them to get to France.
Where to buy Chinese HDC 42/72 core connectors separately? (Harting equivalents) - Page 1
Forum section: electronics / projects

author: Yansi
author_rank: Super Contributor
timestamp: May 20, 2020, 11:50:50 am
content: Hello,looking for a couple of these 42 pin 10A connectors, but all I need are the plug shells, inserts and pins. I do not need the panel mount receptacles.All I can found round Aliexpress are whole sets of plug + panel mount receptacles, like this:https://www.aliexpress.com/item/4000680459849.htmlIs there a way to buy just the plugs, or even spare pins for the inserts?My google-fu is likely weak for this. Any hints appreciated.Y.//I know i can buy these locally in whatever configuration I want to, but I would need to sell a kidney first..
Where to buy: Colored BNC cable strain relief, rubber boot, shroud - Page 1
Forum section: electronics / projects

author: Yansi
author_rank: Super Contributor
timestamp: March 14, 2021, 05:20:14 pm
content: Hello,I am looking for buying a bunch of BNC connector cable boots, like the ones pictured below. However can not find anything at all. Have you seen them anywhere cheap? Not neccessarily Aliexpress or Ebay, but reasonable price is a must. Its just a cheap plastic piece, produced hundreds at a time, for peanutsBut where the hell to find colored ones? Now I am interested especially in those yellow ones for distinguishing 75 ohm (RG59 and alike) cables from those 50 ohm ones. Can't find them anywhere. TME and similar shops have only the black ones (at least thats what I've found).Thanks for any hints or tips, where to buy these.Y

author: jc101
author_rank: Frequent Contributor
timestamp: March 14, 2021, 05:40:52 pm
content: I think RS have somehttps://uk.rs-online.com/web/c/connectors/rf-coaxial-connectors-adapters/coaxial-connector-accessories/?applied-dimensions=4293351907Or Amazon...https://www.amazon.co.uk/Connector-Boots-Strain-Relief-Colours/dp/B07XD3V5DQ/ref=pd_sbs_3?pd_rd_w=WgmeS&pf_rd_p=1469375b-13b4-495f-86c1-e268482be980&pf_rd_r=VWB81HKW4MS6C5H1ESRX&pd_rd_r=a8b55407-6272-4d52-98e0-52effc6b0d32&pd_rd_wg=xMzep&pd_rd_i=B07XD3V5DQ&psc=1Depends where you are in the world...

author: Yansi
author_rank: Super Contributor
timestamp: March 14, 2021, 06:27:44 pm
content: RS should be fine, thanks. Little bit more on the expensive side, but mum look, its a Telegartner!https://uk.rs-online.com/web/p/coaxial-connector-accessories/1122498/Although for a slightly thinner coax, than RG59. But I think one could fit it anyway, with some muscles. ThanxI also found some on fleaBay, but those are the same you've linked from Amazon it seems, unfortunatelly the shipping from UK is killing it.
Where to buy Dave Jone's uCurrent Gold in the UK? - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: November 20, 2024, 10:38:32 pm
content: Hi,where can I buy Dave's uCurrent Gold in the UK?I tried all the distributors as well as Google searches but, unless it is stored with other names it does not seem to be available from UK distributors...Also, I see on the project page that the bandwidth is 300KHz. I assume that is at the output (it might have some filtering or components frequency limitation inside)? I am asking because I would like to use it also by connecting an oscilloscope at the output and monitor currents up to 150KHz. Can it be used that way?Thank you

author: bte
author_rank: Regular Contributor
timestamp: November 20, 2024, 11:01:18 pm
content: There's this version under the "Tiny Current" name:https://n-fuse.co/devices/tinyCurrent-precision-low-Current-Measurement-Shunt-and-Amplifier-Device.html

author: ricko_uk
author_rank: Super Contributor
timestamp: November 21, 2024, 12:32:42 am
content: Thank you @bte ,I saw that one but need one asap and that is somewhere in Europe so a week to get here.
Where to buy litz wire (quickly) in the US? - Page 1
Forum section: electronics / projects

author: TimNJ
author_rank: Super Contributor
timestamp: November 10, 2020, 03:53:41 pm
content: Hi all,Does anyone know of a US source of high frequency litz wire (0.1mm strands ideally) that has distribution in the US, doesn't require you to buy 1000m, and isn't ridiculously expensive? (Am I asking for too much?)All my searching leads to Chinese sellers, which would be fine if I had time to wait for international shipment.Thank you,Tim

author: sandalcandal
author_rank: Unknown
timestamp: November 10, 2020, 03:57:16 pm
content: Not able to help, but I'm also in need of some litz wire for prototyping magnetics and having trouble finding sources.

author: wraper
author_rank: Unknown
timestamp: November 10, 2020, 03:58:25 pm
content: https://www.ebay.com/str/mkmak222litzwire

author: TimNJ
author_rank: Super Contributor
timestamp: November 10, 2020, 04:30:08 pm
content: Quote from: wraper on November 10, 2020, 03:58:25 pmGreat, thank you. Of course, they don't have the size I need, but I'll definitely save the link for later.

author: mjs
author_rank: Regular Contributor
timestamp: November 10, 2020, 05:19:51 pm
content: Check MWS and New England Wire. I'm in Europe, bought from both but that was 10 years ago..

author: TimNJ
author_rank: Super Contributor
timestamp: November 10, 2020, 05:51:11 pm
content: Quote from: mjs on November 10, 2020, 05:19:51 pmThanks. Those are the companies who haven't been so keen on selling small quantities, in the past. I will check with them again.

author: mag_therm
author_rank: Frequent Contributor
timestamp: November 10, 2020, 06:03:01 pm
content: surplussales.comsearch box for "litzWire"They have a small range, by the foot.

author: Wolfram
author_rank: Frequent Contributor
timestamp: November 10, 2020, 11:14:30 pm
content: Pack Litz in Germany have a list of stocked litz that can be ordered without MOQ or lead time issues:https://www.packlitzwire.com/immediate-delivery/Otherwise, there's also Rubadue in the US, I haven't used them myself yet but I've been looking for an excuse to get some of their nice extruded PTFE litz.
Where to buy PT100 RTD elements? - Page 1
Forum section: electronics / projects

author: kb0thn
author_rank: Contributor
timestamp: November 12, 2014, 12:50:09 am
content: Where is a good place to buy PT100 RTD elements? I am not looking for complete assemblies, just the actual wire wound or thin film elements. So far I see that Omega sells them, but not having luck finding too many others.Thanks,-Jim

author: Vgkid
author_rank: Super Contributor
timestamp: November 12, 2014, 01:18:20 am
content: Mouser carries them, Digi-key should also sell them.

author: wraper
author_rank: Unknown
timestamp: November 12, 2014, 04:04:28 am
content: Newark sells them too.

author: Jeroen3
author_rank: Super Contributor
timestamp: November 12, 2014, 05:53:09 pm
content: I've bought some PT1000's on ebay (germany) once. But accurate rtd's are expensive.

author: kb0thn
author_rank: Contributor
timestamp: November 12, 2014, 06:09:45 pm
content: Funny ... I previously checked on Digi-Key and Mouser didn't find much. I see that the Mouser supplier, Heraeus Sensor Technology, is a new supplier. So maybe I checked before they came online.Thanks, y'all!

author: Jeroen3
author_rank: Super Contributor
timestamp: November 12, 2014, 09:32:50 pm
content: You're looking for something like this, right?http://www.digikey.nl/product-detail/en/PPG102C1/615-1045-ND/1014573

author: kb0thn
author_rank: Contributor
timestamp: November 12, 2014, 11:28:31 pm
content: Quote from: Jeroen3 on November 12, 2014, 09:32:50 pmYes, kind of. I need what is commonly referred to as a cyro RTD. A PT100 cyro RTD will go down to -200C. Most RTDs stop at -50C. Mouser now has a perfect unit.Thanks
Where to buy Si MOSFET dice - Page 1
Forum section: electronics / projects

author: blueskull
author_rank: Unknown
timestamp: April 16, 2017, 06:31:07 am
content: As the title says, is there any place I can buy silicon MOSFET dice?I've been working with unpackaged SiC devices quite a lot, from SemiDice. I now need a low speed device that can fully turn on at 8V, which is a bit too low for any SiC MOSFETs.Usually, modern 600V silicon FETs are designed to operate at 12V, and can fully turn on at 8V. SiC devices are designed for 15V~20V operation, and won't fully turn on before ~10V (for Cree CPM3).The proposed design is a low speed 600V 3A solid state relay, driven by a VOM1271T. The driver only outputs 8V, and since it is a very low speed design (practically DC), I cannot use bootstrapping.Loss is extremely critical. At 3A, voltage drop must be below 0.2V.I also need good 3rd quadrant performance, which SiC MOSFETs suck, compared with Si FETs.Therefore, I need to get some silicon parts, in bare die form. Is there any suppliers for that? So far I know ES carries Vishay E/EF series, but Vishay seems have stopped selling bare MOSFET dice.Any suggestions?I'm located in US, east coast.

author: coppice
author_rank: Super Contributor
timestamp: April 16, 2017, 08:51:31 am
content: Quote from: blueskull on April 16, 2017, 06:31:07 amDid you get the SiC die during your PhD work? Silicon vendors generally only talk to people about die if they are either big volume customers, or in a major educational establishment/research centre.

author: coppice
author_rank: Super Contributor
timestamp: April 16, 2017, 12:27:23 pm
content: Quote from: blueskull on April 16, 2017, 09:10:26 amFew RF parts are used in die form. Packaging is frequently the limiting factor in performance, but trying to get long term reliability and good thermal management from a die that was not packaged at source by specialists really puts off the equipment makers. Over time, packaging has evolved to meet the needs of pumping out hundreds of watts at multiple GHz from a packaged transistor.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: April 16, 2017, 12:49:54 pm
content: ?????

author: rfeecs
author_rank: Frequent Contributor
timestamp: April 16, 2017, 04:47:53 pm
content: Quote from: coppice on April 16, 2017, 12:27:23 pmTrue, but RF parts are readily available in die form. Even Digikey and Mouser stock die from Wolfspeed (formerly Cree), Qorvo (formerly TriQuint), Analog Devices (formerly Hittite), Macom, Broadcom (formerly Avago), Microsemi, etc. Other sources are company sales reps.Hybrid chip and wire construction is still very common for RF and Microwave.
Where to buy small 4wire slip-ring with built-in pot or position sensor - Page 1
Forum section: electronics / projects

author: Psi
author_rank: Super Contributor
timestamp: October 17, 2013, 12:01:25 am
content: Hey guys, i'm trying to find a smallslip ringwhich provides 4 contacts as well as position information about the rotation.Doesn't really matter how the rotation sense is done internally but i would much prefer an absolute value as opposed to being relative to start position. A continuous rotation pot would be ideal.Size doesn't matter to much, but ideally smaller than 4cm width wise.Anyone seen something like that for <US$30 ?Or, failing that, does anyone have ideas for getting position from a slip ring externally which would be easy to do mechanically?Best way i can think of is a magnet and hall sensor, time each revolution using a micro and calc the angle assuming constant speed.

author: eurofox
author_rank: Unknown
timestamp: October 17, 2013, 06:04:28 am
content: On ebayhttp://www.ebay.com/sch/i.html?_trksid=p3984.m570.l1311.R1.TR8.TRC2.A0.Xslip+ring&_nkw=slip+ring&_sacat=0&_from=R40

author: Psi
author_rank: Super Contributor
timestamp: October 17, 2013, 06:13:51 am
content: yeah, i know you can get slip-rings on ebay. I'm looking for one with a built-in continuous rotation potensiometer.
Where to buy small springs online? - Page 1
Forum section: electronics / projects

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: April 05, 2020, 06:18:32 am
content: Hi AllI am after a rather odd spring. What makes it odd is the wire diameter relative to the springs ID. The full specs are:Inside dia 13.5-14.0mmUncompressed length 45mmWire dia 0.5-1.0mmSo far the closest thing I have found is:https://www.aliexpress.com/item/33042838408.htmlWith that said, would any of yous know another online retailer that has "small" springs? I found a few USA based ones but the min order/shipping is way too expensive

author: beanflying
author_rank: Super Contributor
timestamp: April 05, 2020, 06:24:02 am
content: I brought myself a range from this supplier lat last year. Just chop to length as neededeBay auction: #132915825317

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: April 05, 2020, 06:37:23 am
content: Quote from: beanflying on April 05, 2020, 06:24:02 amCheers, but unfortunately all their small wire diameters (<0.8mm) don't do a large (>13mm) spring ID

author: beanflying
author_rank: Super Contributor
timestamp: April 05, 2020, 06:50:29 am
content: You will be able to just reform it. I have wound springs over mandrels from straight spring steel wire in the past too.In this case you would look at unbending say the 12 ID x 0.8 over a larger rod (maybe 16-18mm to allow it to spring back) of some sort to unbend it to your 16mm OD. Chances are you will also want to control the power of the spring by adjusting the number of coils in your length too so grab some and play

author: EEVblog
author_rank: Unknown
timestamp: April 05, 2020, 06:57:49 am
content: Try:https://www.smallparts.com.au/https://www.smallparts.com.au/store/categories/springs/
where to connect resistor on LT3015 parallel operation? (neg ldo) - Page 1
Forum section: electronics / projects

author: coppercone2
author_rank: Super Contributor
timestamp: November 19, 2023, 09:00:10 pm
content: The datasheet for the LT3015 has a circuit for parallel operating chips involving a op-amp.It uses 0.01 ohm resistors for each op - amp, and a sense on the line between the resistor and the op amp.Should the trace be connected at the 0.01 ohm resistor, or at the input to the chip?i put red and green dots

author: moffy
author_rank: Super Contributor
timestamp: November 19, 2023, 09:47:56 pm
content: Quote from: coppercone2 on November 19, 2023, 09:00:10 pmAt the 0.01R resistors, that is what you are measuring the voltage drop over, extra trace will just add extra resistance.

author: PCB.Wiz
author_rank: Super Contributor
timestamp: November 19, 2023, 09:49:46 pm
content: As drawn looks correct.The top regulator defines VOUT, and the Opamp compares the current draw, and nudges the setting of the lower regulator, to give equal average currents.Such a circuit may need care at very low load currents.

author: coppercone2
author_rank: Super Contributor
timestamp: November 19, 2023, 10:07:08 pm
content: yeah that is what I did, I put the trace right at the end of the resistor (I used a wire shunt from digikey).The regulators are hard to space evenly because I wanted a single extruded heat sink so the traces are unequal.
where to find "security" long dc barrel plug? - Page 1
Forum section: electronics / projects

author: mcinque
author_rank: Unknown
timestamp: June 18, 2016, 08:19:43 am
content: I need to find a coupe of this connectors as spare parts. I cannot find anything on RS, Distrelec or Digikey, are this kind of plugs proprietary?

author: ConKbot
author_rank: Super Contributor
timestamp: June 19, 2016, 12:11:34 pm
content: For a fluke scopemeter? They are high isolation, so when it's not plugged in you have plenty of creepage/clearance from the internal circuitry. I don't have any sources that aren't attached to power adapters though.

author: mcinque
author_rank: Unknown
timestamp: June 19, 2016, 02:10:50 pm
content: Thank you and yes, it's for a scopemeter (not Fluke). So basically I should purchase the entire power adapter, it would be fine if the price doesn't go high. What are your sources?
where to find a connector - Page 1
Forum section: electronics / projects

author: p.larner
author_rank: Frequent Contributor
timestamp: October 11, 2023, 10:56:10 pm
content: i am looking where to buy an frc-16 connector mentioned in this attatchment,any ideas?google turns up not as does ebay.

author: ataradov
author_rank: Super Contributor
timestamp: October 12, 2023, 12:24:27 am
content: From the pictures, it looks like a standard 0.1" 2x8 connector. Everyone calls them different names, so looking by name is pretty useless, just look by what it is.Here is the straight pin version for examplehttps://www.aliexpress.us/item/2251832769482194.html. But it looks like there are some pictures of the right angle use, which may make assembly more compact.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 12, 2023, 03:17:57 pm
content: yes a single row 0.1" header in the picturesingle and dual row exist up to 50 pins wide .....

author: tooki
author_rank: Super Contributor
timestamp: October 13, 2023, 12:47:47 pm
content: FRC16 is not the name of a model of connector as such. It simply means “flat ribbon connector, 16 pins”. It’s just a bog-standard 16-pin right-angle box header. It looks like that manufacturer likes to use the abbreviation “FRC” for various expansion connectors that link other modules using ribbon cable.

author: tooki
author_rank: Super Contributor
timestamp: October 13, 2023, 12:49:45 pm
content: Quote from: coromonadalix on October 12, 2023, 03:17:57 pmThat’s not the connector in question. The board the datasheet describes is not shown in a photo, only a drawing, and it is a bridge board to adapt the generic Chinese Bluetooth module (shown in a photo), which has the single-row header, to the 16-pin box header shown on the drawing.

author: coromonadalix
author_rank: Super Contributor
timestamp: October 13, 2023, 01:57:23 pm
content: @opgrab a caliper and measure distance between center pins, 2mm 2.54mm etc ....@Tooki everything i saw from the given pdf and google fuu says 0.1" connectorcommonly known as idc16 connectorhttps://www.foxdelta.com/projects/AAZ-0914A/AAZ-0914A-800.jpghttps://www.foxdelta.com/projects/aaz-0914a.htmand yes the part list for this connector is plain stupid .....not being rude .......... if the op had done a simple search .... images comparisons etc ... but eh it's a learning curve

author: tooki
author_rank: Super Contributor
timestamp: October 14, 2023, 10:11:53 am
content: Quote from: coromonadalix on October 13, 2023, 01:57:23 pmI wasn't objecting to the 0.1" part, but to the fact you said it's a single-row connector. It's not, it's a double-row box header, 2x8 pins.
Where to find a rotary encoder with a disc for user interface. - Page 1
Forum section: electronics / projects

author: JoeN
author_rank: Frequent Contributor
timestamp: November 28, 2016, 09:07:16 am
content: Something that is like a volume control for a small portable electronic device where a bit of the disc is outside the case and the user spins it. But it can't be a dual pot, instead it must be a rotary encoder. The idea is a UI spinner so people can go up and down menus quickly. A pot won't work, it can't have stops. The form factor should be very much like a the dual pots used for volume control (it must be small, for a handheld device):Anything like that out there? Especially anything that is reasonable? I can't find it doing a quick eBay or Google search.

author: cowana
author_rank: Frequent Contributor
timestamp: November 28, 2016, 04:57:22 pm
content: Have you looked into mouse scroll-wheel encoders?

author: JoeN
author_rank: Frequent Contributor
timestamp: December 01, 2016, 12:52:34 am
content: Quote from: cowana on November 28, 2016, 04:57:22 pmhttp://www.ebay.com/itm/10PCS-Mouse-Encoder-Wheel-Encoder-Repair-Parts-Switch-7mm-/271914335637Excellent hint, thank you.

author: ebclr
author_rank: Super Contributor
timestamp: December 05, 2016, 04:23:49 am
content: If you want something more 21 century
where to find cheap SMA finger wrenches - Page 1
Forum section: electronics / projects

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: August 26, 2025, 03:59:04 am
content: I wanted to buy a couple of these doohickeys to access SMA connectors in tight spots. Nothing fancy thought I.https://www.ebay.ca/itm/306141202563Are they made of osmium?I checked finger wrench and cable wrench, and I find nothing on aliexpress.What's the magic keyword? I seem to recall a cheap piece of folded sheet metal with four sides of a hex on one end to prod SMAs.I cant imagine something like that costing more than 5 Canada bucks?

author: picburner
author_rank: Frequent Contributor
timestamp: August 26, 2025, 05:05:09 am
content: DigiKey sells them for half that price, but we're still far from an cheap price.But it's a Mini-Circuits product, so...

author: inse
author_rank: Super Contributor
timestamp: August 26, 2025, 05:46:05 am
content: 3D printing instantly came to my mind - search thingiverse for SMA wrench.And make friends with an owner :-)

author: squadchannel
author_rank: Frequent Contributor
timestamp: August 26, 2025, 05:59:38 am
content: stainless steel SLM printing is a good option.

author: Gertjan
author_rank: Frequent Contributor
timestamp: August 26, 2025, 06:03:42 am
content: This Mini Circuits HT-4-SMA SMA Cable Wrench, as shown in the linked e-Bay add, sells from Mini Circuits direct for$39.40On the same page are "Buy now" links to Mouser and Digikey. Mouser ia the cheapest with about the same price.regards, Gertjan.

author: picburner
author_rank: Frequent Contributor
timestamp: August 26, 2025, 07:08:09 am
content: Probably the cheapest solution, but one that requires a bit of work, is to buy a key like the one in the attached picture and cut it lengthwise so that the cable can pass through.

author: jpanhalt
author_rank: Super Contributor
timestamp: August 26, 2025, 10:56:23 am
content: I have also seen similar stamped steel wrenches. The category might be "crowfoot" wrench:Finding a miniature might be hard. On stackexchange someone mentioned "cone" wrenches used by bicycle mechanics. The old fashioned "skate key" might work. Finding the right size of cone wrench or skate key could be a challenge.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: August 26, 2025, 07:53:03 pm
content: My tiny mind can't comprehend why I can buy torque wrenches for about 30$ but a single piece of metal is like 4 times the price.

author: jpanhalt
author_rank: Super Contributor
timestamp: August 26, 2025, 08:18:25 pm
content: Here you go. $7, chromed, Amazon. Probably cheaper elsewhere. I would probably buy a very cheap, stamped steel 5/16" , cut a slot to make it open, and bend it 90° with help from a small torch.
Where to find detailed info about vlf metal detectors - Page 1
Forum section: electronics / projects

author: wawinfo
author_rank: Contributor
timestamp: July 09, 2024, 08:56:23 pm
content: Hi friends. A few months ago I attempted to bulid a metal detector and after many googling and reading articles finally found and choose attached circuit to bulid. I built that and I made very accurate sreach coil and when try to run it I faced many problems. I have a little workshop for making and repairing electronics so I have enough test equipment and experience for troubleshooting that. I want to chek every stage signal and output. But couldn't find proper detailed information for this task. Can anyone guides me to find realy good references for understanding every block here to be able to troubleshooting the circuit really accurate? Like exact block diagram and every block inputs and outputs and theory of operation.
Where to find good replacement batteries for consumer electronics? Cameron Sino? - Page 1
Forum section: electronics / projects

author: Freesurfer
author_rank: Regular Contributor
timestamp: June 25, 2023, 10:57:54 am
content: If you are looking for old batteries sold as new, counterfeit OEM batteries, batteries claiming a higher capacity than the size suggests, poorly performing batteries or a device to lit your bonfire then Ebay or Wish are right there for you.. But I am not trying to be duped with a bad battery and a potential fire hazard.I am looking for OEM batteries or reputable third party replacement batteries that are up to OEM standards. They don't have to be cheap, as long as they are good.OEMs often don't sell replacement batteries directly, and when ordering what seems to be an OEM battery, you are in my opinion more likely to get a bad counterfeit, than if you order a third party battery that never claimed to be an OEM at all.There's a brand called "Cameron Sino" (often shortened to CS) which many battery websites seem to have. Including European and American ebay sellers that seem a bit more trustworthy regarding product quality. Does anyone have any experience with this brand?In particular, right now I am looking for a replacement batteries for these devices (but also just a consistent source of good quality batteries in general):- Samsung Galaxy S5 Active phone- Lenovo Legion Y530 laptop- Corsair Void Pro 2 wireless headphones
Where to find Hirose RPC1-12P-6S connector? - Page 1
Forum section: electronics / projects

author: zapta
author_rank: Super Contributor
timestamp: November 26, 2023, 03:31:19 am
content: I am looking for an Hirose RPC1-12P-6S connector or compatible. It's an obsolete Hirose connector that is used in some Chinese JCB clones such as Sugon 21.Any idea where I can find a unit or two?

author: robson2017
author_rank: Contributor
timestamp: November 26, 2023, 05:30:14 am
content: What about this?https://nl.mouser.com/ProductDetail/Hirose-Connector/RPC1-12P-6S72?qs=3aug5cyrIbcADMj5aFHPhA%3D%3D

author: zapta
author_rank: Super Contributor
timestamp: November 26, 2023, 06:08:25 am
content: I think that's it. Thanks robson2017!
Where to Find Small Plastic Potting Cases (Similar to Class-X Capacitor Casings) - Page 1
Forum section: electronics / projects

author: MyProjectBox
author_rank: Newbie
timestamp: April 03, 2025, 08:37:50 pm
content: Hi everyone,I'm looking for small plastic enclosures suitable for potting miniature electronic modules with fly-leads. Essentially, I'm searching for empty casings similar to those used for Class-X capacitors.I've seen this type of housing used in commercial products, such as Theben's light dimmer modules, where the electronics are encapsulated in epoxy with wires extending out. Since these cases exist in manufactured products, I assume they must be available somewhere.Does anyone know where to source these empty potting enclosures? Any recommendations for suppliers or alternative solutions would be greatly appreciated!Thanks in advance.

author: Simon
author_rank: Unknown
timestamp: April 04, 2025, 06:26:57 am
content: Welcome to the forum. Please do not post the same thing twice, it makes people very unhappy and they complain to us.
Where to find spring based module connectors, like from blog #592? - Page 1
Forum section: electronics / projects

author: luxfx
author_rank: Contributor
timestamp: August 14, 2018, 12:35:31 am
content: InEEVblog #592 mailbag ~44:30, the wireless mike / dead eRIC kit discussion showed the dev board hosting the wireless module with these really cool spring clips. I'd love to use this setup to develop ESP8266 modules, they use the same semicircle edge connectors.Does anyone know what these are called or a link to buy them? I don't even know how to start looking.

author: Mr.B
author_rank: Unknown
timestamp: August 14, 2018, 01:26:25 am
content: Closest thing I have seen is this at Banggood:ESP8266 Test Board Burn Fixture Support ESP-12E ESP-12F ESP-07 And Other Moduleshttps://www.banggood.com/ESP8266-Test-Board-Burn-Fixture-Support-ESP-12E-ESP-12F-ESP-07-And-Other-Modules-p-1235574.html?rmmds=search&cur_warehouse=CN

author: luxfx
author_rank: Contributor
timestamp: August 14, 2018, 01:48:32 am
content: That's very interesting board, and looks handy. Thanks, I might go for this one!
Where to find this IDC socket? - Page 1
Forum section: electronics / projects

author: manu
author_rank: Regular Contributor
timestamp: April 15, 2014, 01:26:17 pm
content: Hello,I'm facing a problem to find a *female* right angled 2.54mm 34 pins (dual row) idc socket:I know that it is more common to have a male connector for a board use, but I have to interface a National Instrument MyRio board (without a ribbon cable).A potential reference is this 3M 5100 series: 5134-B7A2PL. But it's out of stock for a while... So if you have equivalent reference, please let me know!Thanks in advance,Manu

author: fcb
author_rank: Super Contributor
timestamp: April 15, 2014, 01:39:47 pm
content: most catalogue suppliers..or go and have a peek atwww.toby.co.uk

author: manu
author_rank: Regular Contributor
timestamp: April 15, 2014, 01:55:04 pm
content: Thank you for this url, but it's pretty rare. I have already checked farnell, radiospares, mouser, digikey without success...

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 15, 2014, 02:04:36 pm
content: Quote from: manu on April 15, 2014, 01:55:04 pmMost suppliers will have something similar. BTW it is not an IDC socket -that may be your first mistake when searching.If all else fails, Samtec make every permutation of header you can imagine.

author: manu
author_rank: Regular Contributor
timestamp: April 15, 2014, 02:29:09 pm
content: Thank you for your tip!Effectively, I have extended searches from idc to he10 and polarized key 2.54mm headers, and I finally found it after a few hours:http://www.sullinscorp.com/category146/SFH11-PPPC-D17-RA-BK/By the way, Mike, I like your videos!

author: kizzap
author_rank: Unknown
timestamp: April 15, 2014, 11:53:19 pm
content: this was all I could find:http://au.element14.com/samtec/ssw-117-02-t-d-ra/receptacle-2-54mm-tht-r-a-34way/dp/2308490

author: Monkeh
author_rank: Super Contributor
timestamp: April 15, 2014, 11:56:38 pm
content: Quote from: manu on April 15, 2014, 01:55:04 pmIf you'd looked at that link, you might have found:http://www.toby.co.uk/content/catalogue/products.aspx?series=B07a-xx-AGA1-G

author: LukeW
author_rank: Frequent Contributor
timestamp: April 16, 2014, 01:14:05 am
content: Try Digi-Key S5570-ND or S9207-ND, depending on whether you want the polarising key or not.

author: manu
author_rank: Regular Contributor
timestamp: April 16, 2014, 06:38:31 am
content: Hello,Thank you all for these helpful links.Quote from: kizzap on April 15, 2014, 11:53:19 pmI found this one too, it seems that Samtec doesn't make polarized sockets.Quote from: Monkeh on April 15, 2014, 11:56:38 pmOk, in fact I checked your link but I missed this section. Thank you, it is a possible second ressource.Quote from: LukeW on April 16, 2014, 01:14:05 amYes, it seems that only Digikey can distribute Sullins. As it is one of my favorite suppliers, I'm gonna order Digikey this part.
Where to get 3x2 IDC wire to board connector inm2mm pitch? - Page 1
Forum section: electronics / projects

author: DTJ
author_rank: Super Contributor
timestamp: March 10, 2022, 11:28:08 am
content: Has anyone any ideas on who makes a 6W (3 × 2 row) ribbon cable IDC connector in 2mm pitch?I've searched most places I can think of and can not find anything.I have an IP67 panel mounting USB connector that has the 3x2 @ 2mm hole pattern on a small PCB sticking out the back. Soldering individual wires on hundreds of these will be a PITA.Someone must make one, even a 4x2 at a pinch.This style but in 3x2 @ 2mm pitch.https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTs4MC1BkiyjleEhuwPbB3jtMprZLL8wjJAuQ&usqp=CAUThanks.

author: tooki
author_rank: Super Contributor
timestamp: March 12, 2022, 01:49:51 pm
content: Took me 2 minutes to find these on Digi-Key*:https://www.digikey.ch/en/products/detail/amphenol-icc-fci/89361-106LF/1535464That one’s in stock, 3 more are out of stock at the moment, and 13 other types available for special order. Match to a common 2mm header.*Connectors > rectangular connectors, free hanging > filter by part status (active), pitch (2mm), positions (6), rows (2), contact type (female) and cable type (ribbon).

author: gamalot
author_rank: Super Contributor
timestamp: March 12, 2022, 02:24:42 pm
content: The only one I can find that matches your requirements is the Samtec TCMD-03-01, unfortunately none of the distributors have it in stock.https://octopart.com/tcmd-03-01-samtec-16812359

author: DTJ
author_rank: Super Contributor
timestamp: March 14, 2022, 05:44:05 am
content: Quote from: tooki on March 12, 2022, 01:49:51 pmThanks Tooki. I found those we have limited space so need the direct solder to board style.

author: DTJ
author_rank: Super Contributor
timestamp: March 14, 2022, 05:45:32 am
content: Quote from: gamalot on March 12, 2022, 02:24:42 pmThanks Gamalot - you are on the money with that one. I'm conversing with Samtec now about getting some. They will have some in stock in the near future!Cheers.