hybridfree/eevblog-posts huggingface dataset:
where to check all post started by me - Page 1
Forum section: electronics / beginners

author: A2
author_rank: Contributor
timestamp: August 15, 2014, 01:40:42 pm
content: Hi,From where to check all the post started by me.

author: mariush
author_rank: Super Contributor
timestamp: August 15, 2014, 02:07:09 pm
content: Click ProfileMouse over Profile InfoMouse over Show Posts > Show topics
Where to connect the USB Chassis? - Page 1
Forum section: electronics / beginners

author: MBrahim
author_rank: Contributor
timestamp: May 25, 2024, 12:06:48 pm
content: what's your opinions?It really depends on the application.

author: ataradov
author_rank: Super Contributor
timestamp: May 25, 2024, 02:37:19 pm
content: This has been discussed a lot. The standard is vague ans tells to connect it in a way that makes EMC better.People like to make up complicated theories on how to connect it. In practice connect it to the ground and don't worry about it. if you have specific issue doing that in your application, then it would be easier to tell how to redesign to better work in your application. But there is 99.9999% chance it will work as is.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: May 25, 2024, 09:39:30 pm
content: Search the forum for results; we also just had a related conversation:https://www.eevblog.com/forum/beginners/on-devices-side-should-i-connect-usb-cable-shielding-to-the-black-wire/Tim
Where to find (name?) Dupont Female Connector blocking insert pins - Page 1
Forum section: electronics / beginners

author: Kjelt
author_rank: Super Contributor
timestamp: June 23, 2017, 09:32:16 am
content: You all know the Dupont female connectors used to put on the male 2,54mm (0,1") standard headers used for Arduino, Nucleo, MBED etc. etc.Now often to make sure that you do not put the connector the wrong way round on top of the header some pin on the header is cut so the header becomes asymmetrical.This ofcourse only works if the corresponding female Dupont connector has a block of some sort on that same missing pin location.In production equipment there are these nice gray or black plastick insertpins for those connectors.I as amateur use hotglue or fill the pin massive with solder, which I don't want to do anymore.So how are these plastick insertion blocking pins called correctly and where can I order them (pref. on Ebay)Thanks all in advance !

author: tszaboo
author_rank: Super Contributor
timestamp: June 23, 2017, 10:04:59 am
content: Harwin calls this:"For polarising key use order code M20-003"https://cdn.harwin.com/pdfs/Harwin_PC_Connectors_M20.pdfPage 202.Although, I would suggest using dual row shrouded connectors, they are really nice.

author: Kjelt
author_rank: Super Contributor
timestamp: June 23, 2017, 10:15:51 am
content: ThanksPolarizing key , yeah ..... not strange that I did not come up with that search termLooking on ebay I find them for Molex (rediculous expensive at $0,25 a piece for a small plastick insert) not for Dupont though.But now I can google further.Quote from: NANDBlog on June 23, 2017, 10:04:59 amI do for my own projects where applicable althought they do take more room, this is more for ICP connections and for the Nucleo boards etc where I cut off pins that should never be connected

author: Kjelt
author_rank: Super Contributor
timestamp: June 23, 2017, 10:27:22 am
content: Ah Farnell has them, just wait till next order.http://nl.farnell.com/harwin/m20-003/polarising-key-pk100/dp/512023
Where to find 2x5 1.27mm pitch polarized jtag connector - Page 1
Forum section: electronics / beginners

author: Veketti
author_rank: Regular Contributor
timestamp: December 24, 2023, 02:34:07 pm
content: Dear all,I haven't had luck in finding polarized connector for use with Olimex ARM jtag 20-10 -connector on MCU end. I already ordered some 2*5 1.27mm pitch pin headers, but would like to have polarized connector to prevent misconnections. Through hole preferred and if available through Ali or LCSC or what is it even called to get better results for finding it... 2.54 pitch connectors are plenty, but haven't found any 1.27mm pitch..Thank you in advance.

author: Jwillis
author_rank: Super Contributor
timestamp: December 24, 2023, 04:14:56 pm
content: CONN HEADER VERT 10POS 1.27MMYou can search the diagram hereARM-JTAG 20-10 ADAPTERPart numbers are on the schematic.

author: coromonadalix
author_rank: Super Contributor
timestamp: December 24, 2023, 04:59:25 pm
content: simple search give you many places where to buy them, even long flat cableson st-link v3 now they use 14 pins instead of 10, but a 10 pins will still work since it is set inside with the notch pin and you have left over pins on each side, wich i find stupid ??1.27mm is 0.050"

author: ArdWar
author_rank: Frequent Contributor
timestamp: December 24, 2023, 05:24:50 pm
content: Quote from: coromonadalix on December 24, 2023, 04:59:25 pmDoubly so since it isn't a subset of coresight-20 either....If you want to use 14 pins to add 2 nonstandard signals why not use the two NC pins?Does anyone even use coresight-20?

author: ksjh
author_rank: Regular Contributor
timestamp: December 24, 2023, 06:37:22 pm
content: I ordered some shrouded 2x5 pin 1.27mm SMD connectors at Ali last week. Try to search for "male IDC 1.27mm" and you will also find the THT version. "DC3 1.27mm" is also a suitable search term on Ali.

author: Veketti
author_rank: Regular Contributor
timestamp: December 24, 2023, 07:58:52 pm
content: Thank you all for help. "IDC Male Box Header" was the keyword.
Where to find ESP8266 firmware? - Page 1
Forum section: electronics / beginners

author: Gabriel
author_rank: Regular Contributor
timestamp: December 03, 2017, 01:06:09 am
content: Hi All,I have recently acquired some ESP8266 modules. I have since had a search around for the newest firmware. I have found so many versions on so many websites that I am slightly lost which is official or not and what works with the Arduino IDE. I have got the board definitions fromhttp://arduino.esp8266.com/stable/package_esp8266com_index.jsonthis seemed to be the most recommended one. Which firmware do you guys use? I there an update for this module? AT+GMR gives meCode:AT+GMRAT version:0.21.0.0SDK version:0.9.5OKSorry for being a noob,Gabriel

author: Jwillis
author_rank: Super Contributor
timestamp: December 03, 2017, 03:01:10 am
content: Not familiar with arduino stuff but I did find this if it helpshttp://espressif.com/en/products/hardware/esp8266ex/resources

author: danadak
author_rank: Super Contributor
timestamp: December 03, 2017, 11:38:51 am
content: Usually the board vendor has a link for the firmware.FLASHER is one utility that will do it -http://www.instructables.com/id/Intro-Esp-8266-firmware-update/Regards, Dana.

author: Gabriel
author_rank: Regular Contributor
timestamp: December 04, 2017, 08:26:10 am
content: Thank you very much! I will try the links in the instructables.Kind Regards,Gabriel

author: frozenfrogz
author_rank: Frequent Contributor
timestamp: December 04, 2017, 09:06:43 am
content: Hello Gabriel,what way do you want to go with the ESP? If you want to run LUA script or go by AT commands, then the instructables link hooks you up I guess.My recommendation however is to write your own firmware via Arduino IDE. The integration of ESP8266 support is straight forward, just follow the instructions on theESP8266 Arduino githuband the board manager will take care of the rest.Everything else works just with any other Arduino compatible MCU.
Where to find old knob types? - Page 1
Forum section: electronics / beginners

author: Ghitza
author_rank: Contributor
timestamp: June 02, 2021, 10:48:40 pm
content: Hi guys,are there places where you can buy this type of precision knobs for multi turn potentiometers with 3mm shaft diameter?Thank you!

author: bdunham7
author_rank: Super Contributor
timestamp: June 02, 2021, 11:16:34 pm
content: You need all the exact dimensions, number of turns etc.At first glance, this might work.https://www.newark.com/bourns/h-516-3a/turn-counting-dial-satin-chrome/dp/75T9977

author: radiolistener
author_rank: Super Contributor
timestamp: June 03, 2021, 01:24:56 pm
content: Quote from: Ghitza on June 02, 2021, 10:48:40 pmlike this one?https://www.aliexpress.com/item/32846199722.html

author: TimFox
author_rank: Super Contributor
timestamp: June 03, 2021, 01:51:41 pm
content: Make sure your shaft size is 3 mm, not 1/8 in = 3.18 mm (another common size) before buying the knob.

author: Ghitza
author_rank: Contributor
timestamp: June 03, 2021, 07:08:33 pm
content: Thanks for the reply guys but none of those is what I search. It is written on it this:"MOD 20 DIGITOOL BIENNE SWISS".The diameter is 20.4mm and 21.2mm long. The axis diameter is exactly 3mm and it came with a 3540S-ZMX-502 5K Bourns 10 turn potentiometer.This knob can do 20 turns. I like because it is very small comparing to the knowbs made for 6mm and uper axis.I did a search for this potentiometer and there is absolutelly no information for it. It was recovered from a Philips PM3219.

author: wizard69
author_rank: Super Contributor
timestamp: June 05, 2021, 12:30:14 am
content: There are literally hundreds of variations here so finding something that fits exactly might be an issue. For example this:https://www.nteinc.com/pot_web/pdf/400_500_Series.pdf,is close but would require a shaft bushing. Here is another close fit:https://www.ttelectronics.com/TTElectronics/media/ProductFiles/Turn%20Counting%20Dials/Datasheets/2600.pdf,again requiring a shaft bushing.You could try these guys:http://www.kilointernational.com/as they seem to specialize in smallish knobs and dials.https://www.bourns.com/products/potentiometers/turns-counting-dialshttps://www.ohmite.com/assets/docs/acl_acd22.pdfThe problem of the potentiometer shaft might not be as big as you might think. The shaft can be easily bushed and that is done frequently. The bigger problem is actually mounting the new control. As you know space is tight, beyond that you need the right bore for the mounting nut and correct alignment of the back plate. You will have to look at the cad drawings to determine if a specific knob will fit.Best of luck! It looks like those small controls are hard to find these days.
Where to find PoE (RJ45) Module or schematic to build one - Page 1
Forum section: electronics / beginners

author: Signal32
author_rank: Frequent Contributor
timestamp: April 12, 2021, 02:26:04 pm
content: Hello,I'm interested in getting power via Ethernet cable. There is a standard that supports this:https://en.wikipedia.org/wiki/Power_over_EthernetHowever power is not sent via ethernet by default, a module needs to communicate with the PoE switch and request power.My question: Are there such ready-build modules that just do the communication with the switch and request power to be sent ? Or can I find a schematic for one ?I foundthis on eBaybut it also has a 12v transformer built which makes it much larger than necessary and which I don't need. Anyone know of a bear-bones module that outputs 48v or a schematic for one ?Thanks!

author: bingo600
author_rank: Super Contributor
timestamp: April 12, 2021, 02:31:45 pm
content: Something like this ?5vhttps://www.ebay.com/itm/Active-PoE-Splitter-Power-Over-Ethernet-48V-to-5V-2-4A-Compliant-IEEE802-3af/20198961830112vhttps://www.ebay.com/itm/Active-PoE-Splitter-Power-Over-Ethernet-48V-to-12V-Compliant-IEEE802-3af-1A-2A/201991194706Not tested by me , bit they seem quite popular.Ps: Note the : Compliant with IEEE802.3af15.4W/Bingo

author: Signal32
author_rank: Frequent Contributor
timestamp: April 12, 2021, 04:03:42 pm
content: @bingo600, yes, that's what I was looking for, though the module is kind of large probably due to having to deliver 15W. How can I find a schematic for this - I only need ~3W and would rather build a smaller one myself.

author: kripton2035
author_rank: Super Contributor
timestamp: April 12, 2021, 04:04:47 pm
content: see attached pdf

author: Syntax Error
author_rank: Frequent Contributor
timestamp: April 12, 2021, 04:06:43 pm
content: I've used these TPLink injector/splitter combinations without issue. The injector sends 48 volts and the splitter outputs at 12/9/5 volts, suitable for IP cameras, phones, etc. They are available as seperates.https://www.tp-link.com/uk/business-networking/accessory/tl-poe200/Otherwise, a used managed PoE switch can be found on ebay for around $20. Just be sure it still has it's PoE rated power brick.

author: Signal32
author_rank: Frequent Contributor
timestamp: April 12, 2021, 07:36:07 pm
content: Thanks, the LAN8710A from @kripton2035 schematic was what I was looking for.

author: westfw
author_rank: Super Contributor
timestamp: April 19, 2021, 08:38:39 am
content: https://silvertel.com/poe-power-over-ethernet-html/Pre-built minimodules.
Where to Find Small Trimpot with Knob? - Page 1
Forum section: electronics / beginners

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 09, 2010, 03:27:51 pm
content: hard to find in my usual shopping place ebay, very little option, i need it:1) smaller (found 1.5cm knobs, but i think its still too big)2) smd or through hole, not really care, but preferably smd3) black coloredsomething like in the following picture. or the one on the pic low pin count development board.any suggestion? thanx.

author: David
author_rank: Frequent Contributor
timestamp: July 09, 2010, 05:33:27 pm
content: http://uk.farnell.com/bourns/3306p-1-103/trimmer-10k/dp/108239

author: Mechatrommer
author_rank: Super Contributor
timestamp: July 10, 2010, 10:29:53 am
content: Quote from: David on July 09, 2010, 05:33:27 pmno, not that sorry, i mean something with a bigger knob than that, thats available alot in ebay and infact i already have a few of it.the knob diameter is probably around 8-15mm, the smaller, the better, for 15mm dia, preferably the flat (shorter) knob just like the above picture.

author: djsb
author_rank: Super Contributor
timestamp: July 10, 2010, 10:46:07 am
content: http://cgi.ebay.com/CRL-BA16190027-VARIABLE-RESISTOR-20K-OHM-HARD-FIND-P-/180300698290?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item29fac252b2
where to find surplus stores around south florida? - Page 1
Forum section: electronics / beginners

author: rexy666
author_rank: Newbie
timestamp: March 11, 2015, 11:38:36 am
content: I live near Miami, FL. I was wondering where can I find a surplus store near the area for cheap lab tools?

author: GreyWoolfe
author_rank: Unknown
timestamp: March 11, 2015, 12:22:45 pm
content: I don't recall any being there when I was living in Broward County. The only surplus store that I know of is Skycraft in Orlando. Their prices aren't always shown as cheap but you may be able to bargain with them. Check out their website atwww.skycraftsurplus.comThey also have an eBay store. Bad thing is you will pay tax and shipping.

author: nanofrog
author_rank: Super Contributor
timestamp: March 12, 2015, 03:43:17 am
content: Closest I'm aware of isMPJAin West Palm Beach. Not local, but at least it's closer than Orlando (although if you're ever in Orlando, do try and make it into Skycraft).

author: neonhomer
author_rank: Contributor
timestamp: March 12, 2015, 06:06:51 pm
content: +1 on Skycraft. It's a good 3-4 hour drive from South Florida to Orlando, but I think it is worth the trip there if you happen to be in the Orlando area.There is also a place in Melbourne. I can't recall the name off the top of my head, but they have some pretty good stuff as well.
Where to find toggle switch parts? - Page 1
Forum section: electronics / beginners

author: monsunsi
author_rank: Newbie
timestamp: January 26, 2022, 09:21:06 pm
content: Hi guys,I was scouring the internet to find parts for a simple toggle switch. Not all of them, just the following: bushing, plunger, lever/handle. Ideally the lever/handle is brass coated with chrome and the bushing brass coated with nickel. Type of plunger is really up for debate, whether its a rod or a ball on a spring..The idea is, I want to create a custom solenoid toggle switch and really don't want to go for anything off the shelf.I've found a few things on indiamart but don't want to use anything from there. EU/US/China is fine though.Any idea where to get these parts or do I have to find a chinese company that will manufacture them?Thanks for your help!

author: jpanhalt
author_rank: Super Contributor
timestamp: January 26, 2022, 09:30:36 pm
content: Buy a new switch. It is just not economic reality to sell individual parts. Now, if you only need a new mounting nut, that is a different story. Let us know.If you want to create something "novel" then scavenge parts from existing switches or make your own.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: January 28, 2022, 01:13:48 am
content: Are you referring to a toggle switch with a holding coil? You are aware that they exist?
Where to find varactor diodes ? - Page 1
Forum section: electronics / beginners

author: lordvader88
author_rank: Frequent Contributor
timestamp: October 04, 2017, 09:06:18 pm
content: Went to make a sweep oscillator then learned of diodes that change their capacitance vs. voltage.Its possible I have some from stuff I've scrapped ? What old stuff uses them ? I don't want to wait months on ebay.And is there other ways to achieve the same affect

author: medical-nerd
author_rank: Regular Contributor
timestamp: October 04, 2017, 09:15:18 pm
content: HiyaHave a look at what this chap has done using different types of diodes as varicaps as a start.http://www.hanssummers.com/varicap.htmlCheers

author: firewalker
author_rank: Super Contributor
timestamp: October 04, 2017, 09:19:32 pm
content: Old analog tv tuners are full of varicap diodes.Alexander.

author: lordvader88
author_rank: Frequent Contributor
timestamp: October 04, 2017, 09:21:54 pm
content: thanks 1st poster, I shall proceed againI have +3? of those from CRT TVs /VCRs ...hmmm, but in the meantimehttp://www.hanssummers.com/varicap/varicaporig.html,I'll make it and try common diodes/LEDs

author: cdev
author_rank: Super Contributor
timestamp: October 04, 2017, 09:46:30 pm
content: I have bought them from vendors who sell parts to people who build stuff.. You can also find a lot of old parts on ebay.Also, hansummers site will tell you - old LEDs and some other diodes sometimes make decent varactor diodes.They can save money and space over variable capacitors in receiving applications.

author: lordvader88
author_rank: Frequent Contributor
timestamp: October 04, 2017, 11:24:49 pm
content: I have a few old 1980s/90s diodes too

author: BrianHG
author_rank: Super Contributor
timestamp: October 05, 2017, 04:00:09 am
content: High voltage zener diodes work well, like 75v, 250mw. Lower voltage zeners have higher capacitance and work well from 0.5v to around 50% below their rated voltage with a smooth curve. I used to use a few 75v zd with the first 1-12v to make a voltage tuned FM radio & to tune crystals on an MCU port.Also, look here:https://www.digikey.ca/products/en/discrete-semiconductor-products/diodes-variable-capacitance-varicaps-varactors/282?k=tuning%20diodesThese below here are expensive, something like 3-9$ per diode...There are silicon hyper-abrupt tuning diodes from motorola which will go from 300pf down to 10pf in 1 thru 10v.Only AM radio Tuning diodes have that super wide capacitance sweep VS voltage, wider than Motorola's hyper-abrupt, within the first 10v. Something like 600pf down to 15pf. Philips/ECG - Now NXP - used to specialize in these and you find them in PLL tuned AM synthesizer radios.

author: cdev
author_rank: Super Contributor
timestamp: October 05, 2017, 05:58:02 am
content: Kitsandparts.com ordans small parts and kits may have them, otherwise, ebay.
Where to find Wire with colored trace? - Page 1
Forum section: electronics / beginners

author: tjkirby
author_rank: Newbie
timestamp: September 18, 2021, 05:32:24 am
content: Hi All, long time reader first time poster.Im doing some wiring loom reapir and I need to find a supplier of colored wire with colored trace, in 3 or 4mm. However I only need small quantities. 5-10 meters of each color.Ive had a good look around element14 and from google-ing. But the few places I have found only have 2 or 3 different color combinations.Surely this is a common type of wire and Im just not searhcing right? Not using the right keywords?Is anyone able to point me in the right direction?For reference this is the type of trace I am looking for:Any help is appreciated.

author: jfiresto
author_rank: Frequent Contributor
timestamp: September 18, 2021, 05:39:21 am
content: Would it be too much hassle to stripe the wires with paint markers?

author: jpanhalt
author_rank: Super Contributor
timestamp: September 18, 2021, 09:30:31 am
content: This dealer has some assortents:https://www.ebay.com/itm/292064200012?epid=801820122&hash=item440062054c:g:gN4AAOSwGZxg0QeOHowever, it is spiral stripped. Have you tried searching for stripped wire?I suspect the major automotive manufacturers order their wire specially made. When I wanted to match the colors for an automotive wiring loom repair, I went to a local recycling place. It was small enough that one could browse its yard and do the disassembly himself.If the purpose is to provide definitive ID, and not to match, I prefer numbered wires, as used in aircraft and some cars. Numbering machines are available.

author: Benta
author_rank: Super Contributor
timestamp: September 18, 2021, 06:30:36 pm
content: Automotive aftermarket/audio shops is the place I'd look.

author: Jwillis
author_rank: Super Contributor
timestamp: September 18, 2021, 10:05:47 pm
content: Rapid Cables Australia

author: Cerebus
author_rank: Super Contributor
timestamp: September 18, 2021, 11:22:34 pm
content: Go to digikey:https://www.digikey.co.uk/en/products/filter/single-conductor-cables-hook-up-wire/474And select your colour(s):They have 1236 types of wire with "stripe" in the jacket description in their catalogue and 482 of these are currently in stock.Even if you don't want to buy from Digikey that search will give you a zillion manufacturers part numbers to search for or plug in somewhere else.
Where to get a Multimeter in LA - Page 1
Forum section: electronics / beginners

author: House91320
author_rank: Regular Contributor
timestamp: October 08, 2010, 11:47:19 pm
content: Dose anyone know where to get a brand name multimeter in LA.

author: slburris
author_rank: Frequent Contributor
timestamp: October 08, 2010, 11:59:17 pm
content: If you mean Los Angeles, try Fry's Electronics.If you mean Louisiana, I have no idea :-)Scott

author: semaphore
author_rank: Contributor
timestamp: October 09, 2010, 12:37:59 am
content: Yeph, I know Fry's Electronics carry Fluke and other brands.

author: House91320
author_rank: Regular Contributor
timestamp: October 09, 2010, 03:41:00 pm
content: I will check it out today.

author: sonicj
author_rank: Frequent Contributor
timestamp: October 09, 2010, 04:59:17 pm
content: around here LA = Lower Alabama

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 09, 2010, 05:13:42 pm
content: Quote from: sonicj on October 09, 2010, 04:59:17 pmi thought its Logic Analyzerits funny for me though a "Los Angelesian" having a hard time finding one. I thought it is a big state.

author: MrPlacid
author_rank: Frequent Contributor
timestamp: October 10, 2010, 06:51:47 am
content: Ebay for better deal. I wouldn't go to an electronic store to buy a multimeter since they're gonna charge you alot. Check around the pawn shops.On ebay, especially avoid listings that have the unit power on in DC or AC range without any probe attached and the display shows 170V

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: October 10, 2010, 04:36:41 pm
content: I got my second Fluke 77 at a pawn shop for $25 a few years ago.

author: sonicj
author_rank: Frequent Contributor
timestamp: October 11, 2010, 02:09:36 am
content: *suddenly feels the need to visit the local pawn brokers!

author: slburris
author_rank: Frequent Contributor
timestamp: October 11, 2010, 04:12:43 am
content: Quote from: JohnS_AZ on October 10, 2010, 04:36:41 pmHmm, my Flukes wouldn't bemyfirst choice to take to a pawn shop. I'dtake HP stuff first, then Tektronix, then finally Fluke.... :-)Scott

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: October 11, 2010, 04:30:08 am
content: I got a Tektronix DMM a long time ago, like 10 years. The thing was only good for driving in tent stakes.I think it's at the bottom of a cardboard box somewhere in my attic.

author: rossmoffett
author_rank: Regular Contributor
timestamp: October 11, 2010, 06:31:18 am
content: Quote from: House91320 on October 09, 2010, 03:41:00 pmHow did it go? I went to a Fry's in Manhattan Beach for a $10 emergency multimeter once and I could count the girls in there on one hand.They did have an OK selection of Flukes though.
Where to Get a T-Con Board? - Page 1
Forum section: electronics / beginners

author: cpsmusic
author_rank: Contributor
timestamp: August 15, 2017, 02:52:13 am
content: Hi,I have an LG LCD TV (made in 2008). The display isn't working properly - the picture is still present however it has a white overlay (cant' think of a better way to describe it). I suspect the T-Con board has failed so I'd like to try replacing it before the TV goes into the e-waste.There are many T-Con boards available on ebay and I've contacted one seller however they haven't gotten back to me. Just wondering if anyone here can recommend a reputable ebay seller for these products?Cheers,Chris

author: Brumby
author_rank: Unknown
timestamp: August 15, 2017, 03:26:54 am
content: I haven't done a lot of this type of repair, since most people tend to junk a problematic set, but I can't really offer you anything more than researching a seller's feedback could tell you.While you would probably be aware, just make sure you get a compatible board. Board number is important, obviously, but the Revision can be as well.

author: BMack
author_rank: Regular Contributor
timestamp: August 15, 2017, 04:46:37 am
content: The problem you seem to be trying to explain is a solarized picture.Just buy it from eBay or Shopjimmy. If you get the part number right, you'll probably get a good board. Most of the boards on eBay are pulled from broken panels. I know a fair amount of the parts sellers on eBay if you want to run some names by me...but really, there shouldn't be a problem if you have the part number right and verify the correct number on the auction picture. Some part numbers can be confusing so you want to make sure they didn't make a mistake just to save the hassle, eBay covers you over a bad or incorrect part.

author: cpsmusic
author_rank: Contributor
timestamp: August 15, 2017, 05:06:09 am
content: I can't find the exact model on ebay. It's a:32LG50FD-AD televisionand the T-Con board is a:T315HW01 VO CTRL BDI've attached an image.I just want to make sure that I get the right board.Cheers,Chris

author: Brumby
author_rank: Unknown
timestamp: August 15, 2017, 06:00:26 am
content: I'd be interested in what's on that white sticker at centre top. It might have a searchable number on it.

author: cpsmusic
author_rank: Contributor
timestamp: August 15, 2017, 07:05:17 am
content: This one appears to be the right one:http://www.ebay.com.au/itm/AUO-31T05-C02-T315HW01-V0-Ctrl-BD-LCD-Controller-Logic-T-con-Board/361824251436?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2055119.m1438.l2649

author: amyk
author_rank: Super Contributor
timestamp: August 16, 2017, 02:37:54 am
content: I'd check the gamma buffer(s) to see if their outputs are correct. This is a common failure mode in some LCD TVs.

author: cpsmusic
author_rank: Contributor
timestamp: August 23, 2017, 04:20:00 am
content: Hi Folks,I'm pleased to report that I replaced the T-Con board and the TV is now working.Thanks for the help.Cheers,Chris
Where to get datasheets of this part - Page 1
Forum section: electronics / beginners

author: Freshman
author_rank: Regular Contributor
timestamp: April 23, 2024, 10:50:59 am
content: RTS5487 and RTS5413D are the parts which I would like to get the datasheet.Unfortunately, I am unable to find the datasheet.However, these parts are available in 3-party websites.RTS5487:https://es.aliexpress.com/item/1005002453149711.html?src=google&aff_fcid=e03b155088c8472c9532da06d0cc4db3-1713867525730-03181-UneMJZVf&aff_fsk=UneMJZVf&aff_platform=aaf&sk=UneMJZVf&aff_trace_key=e03b155088c8472c9532da06d0cc4db3-1713867525730-03181-UneMJZVf&terminal_id=e624ca772bc34b7bb566bd424b18f89a&afSmartRedirect=yRTS5413D:https://es.aliexpress.com/item/1005005040882561.html?gatewayAdapt=glo2espThe part numbers are present in the description of the product in the above 2 pages.Can someone tell me how to obtain the datasheet of these products? (RTS5487 and RTS5413D)

author: Terry Bites
author_rank: Super Contributor
timestamp: April 28, 2024, 12:34:22 pm
content: Try a vendor of the ic.egwww.sierraic.comSearch for the ic and use the query box to get a datasheet.
Where to get heatsinks - Page 1
Forum section: electronics / beginners

author: strawberry
author_rank: Super Contributor
timestamp: April 20, 2018, 08:10:08 am
content: High power heatsink : size ~140x140x60mmThere are dedicated heatsinks for audio application (different fin orientation)https://www.aliexpress.com/store/product/Free-shipping-140-140-60-MM-heatsink-High-power-heat-sink-high-quality-radiator-aluminum-cooler/1522105_32587015445.html?spm=2114.12010612.0.0.10f67534fcPpURWhere to get from within EU

author: Benta
author_rank: Super Contributor
timestamp: April 20, 2018, 09:53:32 am
content: One of the best known is Seifert:http://www.seifert-electronic.de/They sell through European distributors.

author: mariush
author_rank: Super Contributor
timestamp: April 20, 2018, 10:32:05 am
content: If you need quantity, why don't you order something like this :https://www.digikey.com/product-detail/en/aavid-thermal-division-of-boyd-corporation/725452F00000/HS517-ND/6558801It's 70mm tall , and 48" x 14.75" (1219mm x 374.65) you could cut it in 30 pieces that are approximately 122 mm x 125mm so at 405$ a piece, it would cost you ~ 13.5$ a heatsink ... plus vat and maybe customs taxes.The 45mm tall version is a bit more expensive at 435$ :https://www.digikey.com/product-detail/en/aavid-thermal-division-of-boyd-corporation/701652F00000G/HS516-ND/6558800There's also this version with those ribbed fins , 304.8mm x 234.7mm x 67.56 mm for 82$ - you can make 4 150x115 or 6 100 x 115 heatsinks out of it., so less than 20$ per heatsink.

author: BU508A
author_rank: Super Contributor
timestamp: April 20, 2018, 11:44:19 am
content: Quote from: Benta on April 20, 2018, 09:53:32 amAnother one is Fischer Elektronik:http://www.fischerelektronik.de/Available for example here:Bürklin (They are selling to private customers as well):https://www.buerklin.com/en
Where to get rubber conductive buttons? - Page 1
Forum section: electronics / beginners

author: Ram80
author_rank: Contributor
timestamp: July 20, 2024, 09:53:59 pm
content: The buttons that press onto the PCB metal pads, where would you go to get custom rubber buttons made?

author: indeterminate
author_rank: Regular Contributor
timestamp: July 21, 2024, 12:30:39 am
content: https://www.grommetseal.com/rubber-keyboard/rubber-button/conductive-rubber-buttons.htmlfirst one that came up in a search

author: Psi
author_rank: Super Contributor
timestamp: July 21, 2024, 04:11:27 am
content: Also if it's just for a small/medium volume product, and something ready made might be ok, search aliexpress for 'rubber membrane button'Lots of options there.
Where to get service manual? - Page 1
Forum section: electronics / beginners

author: pmccauley
author_rank: Newbie
timestamp: March 27, 2016, 02:09:45 am
content: Hello,I am new to hardware and taking on a project with a screen from a RCA RP5400. I can't find a service manual for it. I found one page but they wanted money. Does anyone have a good place to find a service manual with schematics?Thanks,PatrickP.S here is link to the clock on RCA pagehttp://www.rcaaudiovideo.com/audio/clock-radios/?sku=RP5400

author: tautech
author_rank: Super Contributor
timestamp: March 27, 2016, 02:16:39 am
content: Welcome to the forum.There's a good few manual repositories linked in this sticky thread in the Repair board:https://www.eevblog.com/forum/repair/repair-documents-and-links-sticky-me-please-mods/
Where to get started?! - Page 1
Forum section: electronics / beginners

author: theyellowtree
author_rank: Newbie
timestamp: February 12, 2016, 01:10:47 am
content: Hey everyone. Im new here although not new to the great eevblog youtube channel.Ive been watching it for a few years, always great to watch but to be honest i dont understand most of what dave is talking about.I have always been making little projects with all materials and following the saying "dont plug it in, take it apart"Issue is i still dont understand most electronics.I want to.Can anyone help with this issue.Where to start.Tools are not much of an issue although apart from a trusty multimeter i have no test equipment.I have basic components that ive been de soldering off random things.Bought an arduino to build a vivarium habitat control unit but that was fairly simple as off the shelf plug in parts and scripts make it easier.Ok im now rambling.Please help spark this unsettled interest in electronics.Thanks in advance, Dom.Sent from my SM-G361F using Tapatalk

author: Muxr
author_rank: Super Contributor
timestamp: February 12, 2016, 01:13:35 am
content: I'd pick up the Art of Electronics, and go over their exercise. Try to use parts they cover in your own circuits. Pretty soon you will come up with a project you want to do based on the knowledge you gain.

author: Morgoroth
author_rank: Regular Contributor
timestamp: February 12, 2016, 01:26:59 am
content: the most basic unit is BJT, as Muxr say, get Art of Electronics and understand how it works, try to design by yourself some project using relays to turn on/off some light at home for example using BJTs.after that I suggest to go for MOSFETS and then opamps...

author: theyellowtree
author_rank: Newbie
timestamp: February 12, 2016, 10:32:08 am
content: Thank you for the quick reply. Im looking what you said. Looks like im going to buy a new book. Afew extra parts.Anyone recommend any of thoses kits from ebay? Both parts and build kits?Sent from my SM-G361F using Tapatalk

author: Galenbo
author_rank: Super Contributor
timestamp: February 12, 2016, 11:14:04 am
content: Quote from: theyellowtree on February 12, 2016, 10:32:08 amNo the inverse. Learn electronics, make your own circuit and pcb, sell it on ebay.

author: XaeroDemon
author_rank: Contributor
timestamp: February 12, 2016, 07:18:02 pm
content: I learned from small circuits to pretty decent MCU desing and now onto high speed design using nothing but internet.If you do a quick research you can find plenty on PDF on electronics. also there somethings called ''design guidelines'' that has gems of info here and there...but you have to be a keen researcher..well that my way....hope that way helpful...
Where to get the new smaller Daly superior series BMS with UART/BT? - Page 1
Forum section: electronics / beginners

author: Jan E L
author_rank: Contributor
timestamp: September 21, 2022, 11:11:46 am
content: I searched both on upper search and under the search choise. No joy. I also tried all kind of strings in the Google site: search. No hits on anything more then "Daly" in here and then you get all kind of other treads regarding Daly.Daly now offer BT connection and APP and battery indicator to connect also to there smaller BMS.Looks like online sellers call the small ones the Daly "superior BMS". But all of them look to be the older witout BT.Where to find the new version for sale?I'm after the 36V 10S 30A version.Here is link to instructions on how to the BMS in question are set up:https://www.dalyelec.com/newsshow.php?cid=24&id=74&lang=1&fbclid=IwAR1UIYAJc4oTrGJxFcsP6Kr0xdTTeWyerW8sEXmmt9P2y637Ggah2e6080M

author: Terry Bites
author_rank: Super Contributor
timestamp: September 22, 2022, 02:23:59 pm
content: The Daly store?https://daly.aliexpress.com/store/4165007

author: Jan E L
author_rank: Contributor
timestamp: September 23, 2022, 12:44:16 am
content: Quote from: Terry Bites on September 22, 2022, 02:23:59 pmNope, can not find it there.I find picture of it around - also at Daly. But only place I have found it so far in a shop is here. But they are out of stock.https://www.banggood.com/DALY-BMS-4S-12V-30A-40A-50A-60A-Smart-Battery-Protection-Board-3_2V-18650-BMS-LiFePO4-BMS-with-Bluetooth-UART-RS485-CAN-NTC-Function-p-1823574.html?imageAb=1&akmClientCountry=NO&cur_warehouse=HK

author: Jan E L
author_rank: Contributor
timestamp: September 23, 2022, 01:39:41 am
content: Did find one at last. Hope I get what I orderedhttps://www.ebay.com/itm/284059958986?var=585554056253
Where to go to get something built? - Page 1
Forum section: electronics / beginners

author: carlosinseattle
author_rank: Contributor
timestamp: May 07, 2020, 05:45:31 pm
content: I've admired the technical expertise of the guys on this forum for awhile, the more I read the more I realize I don't know.I wanted to get a project built, I have the schematic but need someone to build it for me. Where should I post this type of project on this forum?
Where to "inject" dcv in op amp buffer to elevate/offset/bias output 2.5v - Page 1
Forum section: electronics / beginners

author: cape zoloh
author_rank: Contributor
timestamp: July 12, 2020, 02:15:33 pm
content: First off, this is a single ended input 24 bit resolution ADC, so the solution must be very accurate/low drift.Doing so as accurate as possible, described below. If there are solutions providing better precision without being super complex, I'd like to hear it.So,The ADC can take 0-5vdc at its input. I would like it to take -2.5 to +2.5v.I'm having a op amp buffer to drive the ADC input. The reference voltage is 5.0vdcCan I somehow elevate the voltage at the ADC input to +2.5v. This way the signal can swing +/-2.5v (0-5v with elevation) without any damage to the adc.Divide the reference voltage and use that should be natural. I just don't know where or how to do it.In short, I would like a circuit that works likevoltage out = voltage + vref/2Hope this makes sense.The two first attachments are duplicates, sorry for that.

author: rstofer
author_rank: Super Contributor
timestamp: July 12, 2020, 03:29:43 pm
content: Google for 'non-inverting summing amplifier' and, among other references, you get this:https://www.electronics-tutorials.ws/opamp/opamp_4.htmlThe author discusses the inverting case first but moves on to the non-inverting case.Cross-check the results with other resources just to be clear on what is happening.
Where to locate TO-220 transistor on a rectangular heatsink - Page 1
Forum section: electronics / beginners

author: vr6
author_rank: Newbie
timestamp: April 04, 2019, 05:56:40 pm
content: I have a rectangular Fisher SK 485 heatsink (160mm x 60mm) and I want to attach a TO-220 transistor to it. What is the best location to mount it? Is it near the bottom edge or right in the middle?Thanks in advance

author: helius
author_rank: Super Contributor
timestamp: April 04, 2019, 06:35:42 pm
content: I think you're asking if there is any difference in thermal performance? There isn't any difference.Mounting location depends on the mechanical design of the unit and the mounting method. Common mounting methods are machine screws with nuts and nylon insulators, specially made clips, or in some cases sheet metal screws.The TO-220 device can be electrically insulated from the heat sink with silicone pads or mica.

author: vr6
author_rank: Newbie
timestamp: April 04, 2019, 06:46:08 pm
content: Thanks that's what I wanted to know.

author: alex.martinez
author_rank: Contributor
timestamp: April 04, 2019, 07:01:57 pm
content: If the heat soruce is near the dissipation region, you will have no difference on where you locate it, for t --> inf.

author: helius
author_rank: Super Contributor
timestamp: April 04, 2019, 07:10:08 pm
content: Quote from: blueskull on April 04, 2019, 06:37:50 pmThe practical power for a TO-220 is around 30W. Mounting the device at the edge or in the center doesn't make much difference at such a flow rate. Much more important is controlling the mounting pressure.

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 04, 2019, 07:12:13 pm
content: i always like in the middle if possible. heat will spread in heatsink and dissipated to air more evenly. i believe putting it on the edge will make higher case temp due to uneven temp gradient on the heatsink, but havent made a math on that, ymmv.

author: alex.martinez
author_rank: Contributor
timestamp: April 04, 2019, 11:01:54 pm
content: Quote from: Mechatrommer on April 04, 2019, 07:12:13 pmThis is true before you reach steady state (a couple of minutes) since the heat must spread to the cooling region. Once it starts flowing, there is not much difference.
Where to place an EMI filter - Page 1
Forum section: electronics / beginners

author: PinheadBE
author_rank: Regular Contributor
timestamp: April 25, 2025, 10:48:30 am
content: Hi,I have a high power (5 V - 40 A) SMPS powering several almost identical modules. Those modules each contain an µC and are connected through an I2C bus to another module who supervises the whole thing.I would like to play it safe and add one or more EMI filters on the DC lines.There is a distance between 1 and 2 meters between each module and the SMPS.Where should I place the EMI filters ? Close to the SMPS or close to the modules ?Thanks.

author: Phil1977
author_rank: Frequent Contributor
timestamp: April 25, 2025, 11:23:44 am
content: Standard answer: It dependsDo your modules backfire EMI to the power lines? Then I´d place the filters close to the modules.Do you want "cleaner" power from the SMPS? Then place the filters near the SMPS...Is the system connected to PE? Then it may be a good idea to keep all components connected with low impedance to PE and place filters where ground loops are created.

author: PinheadBE
author_rank: Regular Contributor
timestamp: April 25, 2025, 11:57:55 am
content: Thanks PhilIt is indeed to clean the power from the SMPSUnfortunately, it's an older house where PE is only installed in rooms where water is present: kitchen, bathroom....So, no PE in the living room where this project will be installed
Where to put information about software? - Page 1
Forum section: electronics / beginners

author: LeoK
author_rank: Newbie
timestamp: October 06, 2018, 03:47:17 pm
content: Hello. My name is Leon and I'm a test engineer and a company owner.Our company main business is ICT and Boundary Scan (JTAG) test programs development.Also we offer different types of test modules and software for Boundary Scan testing and easy troubleshooting.I'd like to put here more information about our software. What a forum section can I use to put this information?
Where to start with self-calibration? - Page 1
Forum section: electronics / beginners

author: mike3177
author_rank: Contributor
timestamp: July 30, 2016, 01:24:52 pm
content: I am interested in calibrating equipment on my own, and I would like to start off by calibrating my own equipment. (I am not talking about becoming accredited/licensed to calibrate other people's equipment, I understand that I would probably need to start off with some NIST traceable calibrated equipment if I wanted to do that.) However, if I were to purchase a used piece of equipment, I would like to be able to do some work on said piece of equipment and be able to say with a certain degree of confidence that it is now calibrated.Here is a list of my current equipment which was all purchased second hand.HP 4192A impedance analyzer with 16047A test fixtureHP 8753B VNA with opt 10 and 85047A S Parameter test set85032B type N calibration kitHP 3403C RMS voltmeterTek 2465B 400 MHz scopeTek 2232 100 MHz scopeVarious probes / test leads / adapters / connectorsFluke 81 function generator with pulse generator capabilitiesCheap multimeter but I will be picking up a couple of good ones soonWill also be picking up a couple of variable power supplies soonIf you were me, where would you start? Is there a certain machine that I should calibrate first since its accuracy is more important than the rest? Or will I need to have at least one specific machine professionally calibrated to give me a starting point that I can trust, and if so which machine?ThanksMike

author: singapol
author_rank: Frequent Contributor
timestamp: July 30, 2016, 01:36:47 pm
content: I would suggest downloading the service manuals if you can find them and see for yourself how the machine is calibrated with what equipment and whether it is within your capability.My guess is you will need to spend some money on certain pieces of test equipment. Really read it carefully since you want to learn.
Where to start? - Page 1
Forum section: electronics / beginners

author: Greyersting
author_rank: Regular Contributor
timestamp: October 10, 2013, 12:50:07 am
content: Where can I start learning about electronics? This has been a recent hobby of mine but I know almost nothing. Where did you guys start?

author: EEVblog
author_rank: Unknown
timestamp: October 10, 2013, 12:58:16 am
content: These days the likes of Sparkfun and Adafruit have excellent beginner info and kits etc available.The Talking Electronics website has a ton of stuff.The best advice is to find an electronics topic/subject/thing that interests you and play around with that. It could be little robots, flashy LED cubes, FM bugs, or whatever.

author: c4757p
author_rank: Super Contributor
timestamp: October 10, 2013, 01:34:49 am
content: My best advice is to get in a little over your head. If you don't need to do research to finish your project, you're not learning much. Pick something you want to do but don't know how, and then just do it. Do your best attempt, then hit the books and Google and more knowledgeable people on the forum and whatnot when you get stuck trying to figure things out.Necessity is the mother of invention, and invention is the mother of learning. Need some piece of test equipment you don't own? Build it! Improvise!It is definitely fun to build projects like LED cubes, and it can be relaxing to work on a project where you know what you're doing (or are just following a kit), but the best projects make you learn.

author: HamiltonHipster
author_rank: Contributor
timestamp: October 10, 2013, 02:12:28 am
content: Teach Yourself Electricity and Electronics- Stan GibiliscoThis is the book that got me into Electronics. It will lead you through the physical concepts like atoms, Volts and Amps... through to basic electronics, Resistors, Capacitors, Inductors, DC, AC, Circuit analysis, a little bit of Digital, Oscillators, Amplifiers, Semiconductors, all that good stuff.Try to find it at your libraryGood luck buddy!