hybridfree/eevblog-posts huggingface dataset:
Where are we now with the genuino/arduino mess? Any update? - Page 1
Forum section: electronics / beginners

author: gb243
author_rank: Contributor
timestamp: December 14, 2017, 12:40:38 pm
content: Today I downloaded the arduino compiler and it asked for a financial donation. I know there is the community arduino (genuino outside the US) and the Italian arduino which is a single person. How can I ensure that my donations and business only go with the community? If a board is from Europe and has the word arduino on it with the community logo is that the one to avoid?

author: paulca
author_rank: Super Contributor
timestamp: December 14, 2017, 02:32:27 pm
content: Wikipedia seems to suggest the two competing companies were merged in 2016.

author: gb243
author_rank: Contributor
timestamp: December 14, 2017, 03:45:13 pm
content: I managed to miss that obvious update. Sorry.......

author: saike
author_rank: Regular Contributor
timestamp: December 14, 2017, 06:52:04 pm
content: This is from a few months agohttps://techcrunch.com/2017/08/01/federico-musto-is-out-as-arduino-ceo/

author: ebastler
author_rank: Super Contributor
timestamp: December 14, 2017, 07:13:28 pm
content: Quote from: saike on December 14, 2017, 06:52:04 pmAnd that saga has continued. After Musto was kicked out, Arduino AG (the company created through the prior merger of the two Arduino enemy camps) changed ownership:http://www.audioxpress.com/news/a-new-era-for-arduino-original-arduino-founders-finally-get-100-controlAllegedly all is well now, with the original founders being back in control. But I don't know -- if the Arduino boards were anywhere near as fickle as their creators, nobody would be using that platform...

author: rrinker
author_rank: Super Contributor
timestamp: December 15, 2017, 04:25:32 pm
content: They can be. I have all sorts and never had a problem, but I've avoided the absolute rock bottom cheapest Chinese ones. Since it's all OSH... I always work in Windows so I've not had a problem with the clones that use the CH-whatever USB chip, they've all just worked. Some of the Nanos I have look a little dodgy in the assembly and soldering department, but I guess I can't expect much when I paid less for each of those than I can get an ATMega328 bare chip for. So far every one from the 10 pack I bought has worked - it was a more expensive one that had a bad solder joint on a capacitor which I only made worse in an attempt to repair - SMD and my poor vision do not mix, lighted magnifier and microscope included. I really don't know what I am going to do with 10 Nanos, other than, at a cost of about 1USD each, not worry about accidentally frying a pin or two while prototyping things.

author: saike
author_rank: Regular Contributor
timestamp: December 15, 2017, 06:42:32 pm
content: I bought 12 Arduino approved boards from a well known USA company a few years ago to try and avoid any quality problems, and 50% of them failed within a few weeks with a faulty oscillator. If the quality control checks don't go right back to the component suppliers the name on the board counts for nothing.
Where can i buy a Remplacement Desoldering gun ? - Page 1
Forum section: electronics / beginners

author: hitachi8
author_rank: Contributor
timestamp: July 26, 2010, 11:34:59 pm
content: hello people ,i have a solder/desolder station ( with a vacuum pump ) but i need a replacement gun (the one that come with it is broken)... Where can i find one ?Here some picture of the station :i need a gun like it :http://www.a1parts.com/solomon/img/index.1.jpgi find it on that site :http://www.a1parts.com/solomon/index.htmlbut it cost 52$+shipping ! i bought the station in a yard sale for 5$ i think , i am not gonna buy a 50$ gun !?.

author: squeezee
author_rank: Contributor
timestamp: July 27, 2010, 12:30:39 am
content: What isn't working about the gun? is it physically damaged (smashed/cracked/etc.)? if not perhaps the heating element just needs to be replaced. (assuming the base station is working correctly)Still, even buying a new gun that's pretty cheap to get a working desoldering station.

author: hitachi8
author_rank: Contributor
timestamp: July 27, 2010, 12:53:38 am
content: The station it self is working ( the pump works , and everything ).The old gun is cracked ,melted and the tip is missing , but the element still works .

author: MTron
author_rank: Regular Contributor
timestamp: August 05, 2010, 04:36:28 pm
content: Off topic...Hitachi8....surely you are not located in the Toronto Area???...i only ask because A1 is in the Toronto area and i frequently go to that store....On a side note, if anyone IS in the TO area...you will not find a better store to find electronics then A1....truly a mecca of surplus parts...and no...i don't work there..LOL**edit** upon re reading your post i see that you were considering shipping...so no...you likely dont like in TO...heh....where do you live...just curious?
Where can I buy capacitative touch buttons? - Page 1
Forum section: electronics / beginners

author: redgear
author_rank: Frequent Contributor
timestamp: July 15, 2020, 03:38:24 pm
content: I am planning to use capacitative touch button withCAP1206. Like the ones used on induction stoves. But I'm cannot find a place to buy them online. Tried Mouser, RS Components and Digikey.Thanks

author: ledtester
author_rank: Super Contributor
timestamp: July 15, 2020, 03:45:58 pm
content: What about the TTP223? It's only single channel, but if you search for that you'll find multichannel chips - like the TTP226:https://rees52.com/arduino-modules/1031-ttp226-8-channel-capacitive-touch-pad-sensor-sensing-detector-module-capacitive-touch-switch-na063Might have to get the TTP* chips from lcsc.com or aliexpress.Also, some microcontrollers have GPIO pins which can be configured as capacitive touch switches.

author: redgear
author_rank: Frequent Contributor
timestamp: July 15, 2020, 03:55:46 pm
content: Quote from: ledtester on July 15, 2020, 03:45:58 pmThanks. But I am not looking for chips, Im looking for capacitive touch buttons. Standalone ones that I can integrate in my project.

author: redgear
author_rank: Frequent Contributor
timestamp: July 15, 2020, 04:00:51 pm
content: Something like these

author: Benta
author_rank: Super Contributor
timestamp: July 15, 2020, 04:22:23 pm
content: ^^^ This.Capacitive touch panels (just like PCBs) are made to order. And it's cheap. Just design your own panel.

author: redgear
author_rank: Frequent Contributor
timestamp: July 15, 2020, 04:42:53 pm
content: Quote from: blueskull on July 15, 2020, 04:18:28 pmCan you abbreviate NRE? So, I just design a PCB and place a glass over it?Quote from: Benta on July 15, 2020, 04:22:23 pmIs there a special manufacturer or all PCB manufacturers can do it?

author: JustMeHere
author_rank: Frequent Contributor
timestamp: July 15, 2020, 04:43:18 pm
content: The only one's I've seen are really just pcb traces.Oh, and aluminum foil.

author: redgear
author_rank: Frequent Contributor
timestamp: July 15, 2020, 04:44:34 pm
content: How do I light them from underneath? Do I need some sorta ESD protection or something?

author: Benta
author_rank: Super Contributor
timestamp: July 15, 2020, 06:03:03 pm
content: NRE is "non-recurring engineering costs". This is the investment for design, tooling etc. before you have a product prototype in your hand. After that it's pure production cost.It's quite low for this kind of product, perhaps a few hundred to a few thousand dollars. OTOH, as you see with PCBs, it is probably also possible to work without NRE, provided you can produce 100% workable design files to the manufacturer.Concerning material, backlighting, color etc. you'll really have to discuss this with the manufacturer. There's no "one size fits all".
Where can I buy hybrid IC terminals (straight, not 90deg, for 1.6mm pcb) - Page 1
Forum section: electronics / beginners

author: dusan
author_rank: Regular Contributor
timestamp: August 03, 2024, 09:36:04 am
content: For example CB-1-5https://www.mac8japan.com/uploads/entry_meta/file_value/6035/en_2022a_cb-254.pdfPreferably LCSC or similar. I tried various searches but I just can't find them.The reason I want hybrid ic terminals is because I need to bend them few times (for example for jack replacement) and 90deg header pin I wouldn't be able to bend because they are too stiff.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 03, 2024, 01:45:34 pm
content: That's not a good idea. Just use wires -- even short ones will be far easier to assemble. A flex circuit or jumper might also be considered.Tim

author: squadchannel
author_rank: Frequent Contributor
timestamp: August 03, 2024, 05:26:28 pm
content: Te or Molex makes them.But using it as shown in the picture is mechanically problematic.It is of course impossible to bend it many times, etc. as you describe. It will break.Also, you are using it as an interconnect with the potentiometer, but the twist and vibration from operating the pot will be transmitted directly to the solder on the terminals and will cause cracks. use the wire has to relieve the stress.

author: BillyO
author_rank: Super Contributor
timestamp: August 08, 2024, 02:58:51 am
content: Why not just use a card edge connector and matching socket? The daughter board can then be removed for jack replacement. Or failing that being viable (too few connections) you could use header connectors and a short IDC cable?

author: pcprogrammer
author_rank: Super Contributor
timestamp: August 08, 2024, 05:13:23 am
content: Easier is to use a combination of a right angle pin header (male) and straight socket (female). This way the daughter board is removable and the connector can absorb some movement.See these items on Aliexpress:https://nl.aliexpress.com/item/1005006438592096.htmlhttps://nl.aliexpress.com/item/4001198421663.html
Where can I find an firmware update for my Rigol DS1052E? - Page 1
Forum section: electronics / beginners

author: m.Alin
author_rank: Newbie
timestamp: October 13, 2012, 10:20:51 am
content: I've bought a Rigol DS1052E about a year ago. The current firmware version on my 'scope is00.02.05 SP2. I'm sure that by now Rigol must have updated the firmware for this DSO, but I can't seem to find it anywhere on their site. How can I find out what is the current version of the firmware and download it?I wrote to Rigol through their Contact form on their site, but they didn't reply yet.
Where can I find the latest news on the µSupply project? - Page 1
Forum section: electronics / beginners

author: RogerMc
author_rank: Contributor
timestamp: January 16, 2014, 11:27:26 pm
content: It seems to go dark about one year ago after episode #12.

author: mjrandle
author_rank: Contributor
timestamp: January 16, 2014, 11:48:28 pm
content: Search the forum for LT3080 and you should fine some of the issues that were indentified with this IC and Dave's comments.Cheers,Mike

author: apelly
author_rank: Unknown
timestamp: January 16, 2014, 11:55:27 pm
content: Tip: Don't ask Dave!If you get a response, it may be a rant.

author: RogerMc
author_rank: Contributor
timestamp: January 17, 2014, 12:12:30 am
content: Thanks, now I wish I could remove my post.
Where can i get a genunine Hakko FX-888/FX-888D - Page 1
Forum section: electronics / beginners

author: Grayfox
author_rank: Regular Contributor
timestamp: December 04, 2013, 11:32:45 am
content: Is there any place i can get this soldering iron at a good price for 240VAC @50Hz systems with the australian plug?Element 14 doesn't have stock of the old analog one and the digital one is $330 and that is not including delivery.

author: popamp
author_rank: Newbie
timestamp: December 04, 2013, 11:47:50 am
content: I'm assuming this one from Mektronics has the aussie plug?http://www.mektronics.com.au/hakko-fx888d-digital-soldering-station.html#.Up8WReIqkdo

author: Grayfox
author_rank: Regular Contributor
timestamp: December 05, 2013, 12:07:10 am
content: thanks
Where can I get a Service Manual for an AOC 19" and an AOC 22" monitors - Page 1
Forum section: electronics / beginners

author: jaycalderon
author_rank: Newbie
timestamp: January 28, 2018, 11:11:17 pm
content: Hi, I would like to get Service Manuals for two AOC Monitors.The monitors are AOC Model:19LVWKand AOC Model:TFT22W90PSThe problem with this monitors is that there is a video splitter sending video to both monitors to different rooms. there was a short circuit at the plug where the splitter is and apparently the splitter must have short something in the video card on both monitors.The 19" monitor turns on but I only get audio the screen is totally black so I checked it with a flash light and there is no video. There is no back light or video but it has audio.The 22" Monitor turns on normally but I get the No signal sign floating around the screen. It doesn't recognize the input which I sent to both monitors directly from my laptop with a working video cable. I confirmed that my laptop was properly sending video through a good working monitor.I suspect this to be and issue with the video card on both monitors. I'm exited to start doing tests, but would like the service manuals or diagrams of the video cards in case I have to go deep with this.I'm new at this and would like to experiment with these monitors. I'm really exited to be a member here. Electronics has always been my dream since I was a young boy but unfortunately I was not able to study it then. I've been educating myself through youtube and other sourcesand as and older guy this has become my passion.Please HelpJay Calderon
Where can I get this pcb terminal block? - Page 1
Forum section: electronics / beginners

author: MassDestruction
author_rank: Contributor
timestamp: September 18, 2015, 10:05:46 pm
content: Man I've been looking everywhere and I can't find anything like this thing. I see it in a lot of electronics applications. Perhaps it's not a terminal block but it's called something else? It also has a male end too. I'm taking about the white thing in the picture.

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: September 18, 2015, 10:19:35 pm
content: Are you talking about the white socket?Try searching Google pictures & distributors for JST connector. You will have to know what the pin pitch is. It might be even available on eBay. Usually 2.54mm, 2mm, 1mm, .8mm etc.One webpage link:http://www.jst.com/home20.htmlhttp://www.jst-mfg.com/product/detail_e.php?series=58

author: ez24
author_rank: Super Contributor
timestamp: September 18, 2015, 10:20:16 pm
content: One place to lookhttp://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20150918141832&SearchText=5+pin+pcb+connector+male

author: liquibyte
author_rank: Frequent Contributor
timestamp: September 18, 2015, 10:24:45 pm
content: Commonly referred to as a header.

author: MassDestruction
author_rank: Contributor
timestamp: September 18, 2015, 10:39:38 pm
content: Yes JST connector! That is exactly what I am looking for! Thank you so much. I really appreciate it.

author: Quarlo Klobrigney
author_rank: Super Contributor
timestamp: September 18, 2015, 11:12:47 pm
content: No problem. Glad to help. I searched a little deeper because of some clocks I'm building, and I've just about run out of my salvaged connectors and cables. The majority were stripped out of VCR's in the 90's before they were "slimmed" down from their many board designs.Quote from: MassDestruction on September 18, 2015, 10:39:38 pm
Where did the negative voltage come from? - Page 1
Forum section: electronics / beginners

author: stafil
author_rank: Regular Contributor
timestamp: March 20, 2020, 06:26:16 am
content: Thank you so much for the help so far amazing people!I am looking at a schematic and can't seem to understand how we end up with the negative -8.1V and the -1.4V. Any insights?

author: newbrain
author_rank: Super Contributor
timestamp: March 20, 2020, 07:30:26 am
content: To complete what blueskull correctly explained, I will add the explanation for the -1.4 V at the base of Q2.What happens here is dual to what described above, substituting voltage for current and capacitor for inductor:When VGEN is positive, C23 will charge through R40 and the parallel between R39 and Q2 base-emitter junction.The side of C23 connected to Q2 base will be at a lower potential than the side towards R40.When VGEN goes to 0, this negative end of C23 will pull the base of Q2 below 0, and it will discharge through R39 and R40 (Q2 BE junction is now reverse polarized).The -1.4 V value depends on the amplitude and duty cycle of the (supposedly square) waveform of VGEN.

author: Gyro
author_rank: Super Contributor
timestamp: March 20, 2020, 09:44:38 am
content: That's the negative rail generator from a JYE DSO138 btw. Yes, the VGEN is a square wave signal put out by the CPU. The V-MON signal is an ADC input to allow regulation in S/W, but I don't think they ever implemented it.

author: Mechatrommer
author_rank: Super Contributor
timestamp: March 20, 2020, 12:22:56 pm
content: buck-boost also (i prefer) called inverting dc-dc converter... the upstream Q1,Q2,VGEN are for switch..i tried to build it here..https://www.eevblog.com/forum/beginners/how-to-improve-efficiency-of-inverting-dc-dc-smps/?topicscreenhttps://en.wikipedia.org/wiki/Buck%E2%80%93boost_converter

author: stafil
author_rank: Regular Contributor
timestamp: March 20, 2020, 08:07:09 pm
content: Thanks all! I read about buck boost converters yesterday after your replies and I think I get the idea more or less now. Very smart circuit. Thanks a lot for being so helpful!
Where do you buy LiPo batteries and chargers from? - Page 1
Forum section: electronics / beginners

author: nathanpc
author_rank: Unknown
timestamp: August 25, 2013, 10:00:01 pm
content: I want to start using LiPo batteries in my projects, but one of the first things that I noticed was difficult it is to find a place which sells them. I was searching on Dave's videos about LiPo batteries and in one of them he mentionedHobbyKing. Their product selection is great, but there's one little issue with it, they don't ship to Brazil via UPS, DHL, or FedEx, and sadly because of the time that standard packages wait for clearance here in Brazil is ~1 month, and express packages are only a day, express shipment is most of the time a must.Does anyone have any suggestions of online stores that ship internationally via UPS, DHL, or FedEx?

author: van-c
author_rank: Regular Contributor
timestamp: August 26, 2013, 12:36:37 am
content: Just about any Radio Control (RC) hobby store will carry Lipo batteries and chargers. Check your local Yellow Pages under "Radio Control Hobbies" to find a store nearby.Of course, finding an online source will definitely save you some money. As Dave said, HobbyKing in China is one of the most famous but you might also tryhttp://www.allerc.com,http://www.horizonhobby.com, orhttp://www.hobby-lobby.com. You can find numerous sources for Lipos and chargers through the RC hobby forums, such as RCGroups or RC Universe. Try this link in RCGroups to see if a vendor is mentioned that ships to Brazil:http://www.rcgroups.com/batteries-and-chargers-129/.Good luck!--Van

author: Andy932
author_rank: Contributor
timestamp: August 26, 2013, 04:12:41 am
content: Old laptops r a good source of lipo battery's as for the charging i just build my own chargers for them

author: 8163jb
author_rank: Contributor
timestamp: August 26, 2013, 05:34:28 pm
content: Adafruit do some nice LiPo batteries and chargers for projects, they're not very large so it depends on what kind of project you are doing, if it just to power an MCU or other small circuitry it should do fine, but if it is for something beefier like a quadcopter these won't do. They ship worldwide via UPS I think!http://www.adafruit.com/products/259<-- there is a chargerhttp://www.adafruit.com/products/328<-- there is a batteryHope this helps!

author: MatCat
author_rank: Frequent Contributor
timestamp: August 26, 2013, 06:27:12 pm
content: As a hobbyist RC aircraft pilot I can assure you I get nearly ALL of my LIPO's from hobbyking, it is probably going to be the cheapest for ok quality you are going to find, but as previously stated any RC hobby store will have them. Personally for charging I use the Turnigy Accucel-6 which is a fantastic charger for smaller batteries (smaller being 4 cells or less, and less then around 5 amp hours in battery size).

author: LowRay
author_rank: Newbie
timestamp: December 20, 2016, 05:20:41 am
content: If you need help regarding your batteries. I recommend visiting this site.http://www.redsradiocontrol.com/-desire-power--batteries-128-c.asp. It really helped me in replacing dead batts.
Where do you guys get inductors? - Page 1
Forum section: electronics / beginners

author: Dylon124
author_rank: Contributor
timestamp: October 07, 2013, 01:09:21 am
content: I need a 33uH inductor for cheap fast for an smps I designing!

author: Toble_Miner
author_rank: Contributor
timestamp: October 07, 2013, 01:17:34 am
content: Hi,maybeDigikeyhas what you're looking for.Tobias

author: walshms
author_rank: Regular Contributor
timestamp: October 07, 2013, 01:18:08 am
content: www.mouser.comis another good resource.

author: Kryoclasm
author_rank: Regular Contributor
timestamp: October 07, 2013, 02:00:43 am
content: Roll your own!Air core inductor:33.035 µHCoil diameter 15mmCoil length 10mmNumber of turns 50 tWire length 235.62 cmIf you want to use a soda bottle cap as a form, then try this...Coil diameter 30mmCoil length 14mmNumber of turns 32 tWire length 301.59 cmhttp://www.m0ukd.com/Calculators/air_core_inductor_calculator/

author: hechen
author_rank: Newbie
timestamp: October 07, 2013, 02:02:43 am
content: Where are you located?If in the UShttp://www.newark.com/is a good source as well.

author: Toble_Miner
author_rank: Contributor
timestamp: October 07, 2013, 02:05:13 am
content: @Kryoclasm:This guy is actually designing a SMPS. I don't think an air core inductor will work too well for him. I suspect he targets a efficiency > 1%.EDITAlso for filtering purpose an air core inductor would not be suitable. An iron-powder core inductor would be much better.

author: Kryoclasm
author_rank: Regular Contributor
timestamp: October 07, 2013, 02:06:04 am
content: i see.

author: simpson
author_rank: Contributor
timestamp: October 07, 2013, 02:47:18 am
content: Mouser, Digikey or eBay.

author: vk3yedotcom
author_rank: Frequent Contributor
timestamp: October 07, 2013, 08:34:36 am
content: Quote from: Dylon124 on October 07, 2013, 01:09:21 amjaycar.com.au

author: TNb
author_rank: Regular Contributor
timestamp: October 07, 2013, 08:58:26 am
content: Sometimes it is really faster to make your own, than wait for it week or two to be delivered. It is not so hard, google it, a lot of instructions out there.
Where does the pad under the IC go? - Page 1
Forum section: electronics / beginners

author: brownt
author_rank: Regular Contributor
timestamp: March 03, 2019, 11:06:44 am
content: Hi,I am looking at a MAX4910 audio switchhttps://www.maximintegrated.com/en/products/analog/analog-switches-multiplexers/MAX4910.htmlThere is a copper pad underneath it. Should that be soldered to ground or somewhere else?

author: Twoflower
author_rank: Frequent Contributor
timestamp: March 03, 2019, 11:19:44 am
content: Unfortunately they haven't denoted the pad in the drawings. But it is highly possible that this is the EP (exposed pad) which should be connected to gnd.Edit: Yes it is. In the drawing you can see that the Exposed Pad uses the dimensions D2 and E2 which is in the drawing the pad under the device.

author: wraper
author_rank: Unknown
timestamp: March 03, 2019, 11:27:38 am
content: Did you actually open the datasheet?Page 7:Quote
Where have I gone wrong with this design? - Page 1
Forum section: electronics / beginners

author: Jackster
author_rank: Frequent Contributor
timestamp: March 16, 2020, 01:44:28 am
content: Using a ATmega328P-MMHR with a Invensense MPU-6050I have tested this with a breadboard, though this was with a Arduino Nano and a MPU-6050.The ATmega is working, I have flashed it with Arduino Nano firmware and uploaded the same test sketch that tests the chip.But it is not initialising the MPU 6050.So guessing my schematic is wrong somewhere?Anyone able to see where?http://www.farnell.com/datasheets/1788002.pdf?_ga=2.266263690.46322704.1584313282-52128171.1578337775&_gac=1.217087460.1582292175.Cj0KCQiAnL7yBRD3ARIsAJp_oLbaWLf7qCTeZtm4S8TabxNrUp6vJAxpE0FKTqPA3zEGRJsok3DIwjUaApU_EALw_wcBhttps://www.mouser.co.uk/datasheet/2/268/Atmel-8271-8-bit-AVR-Microcontroller-ATmega48A-48P-1315288.pdfThank you!

author: austfox
author_rank: Regular Contributor
timestamp: March 16, 2020, 03:54:22 am
content: Pin 1 (CLKIN) to ground?

author: floobydust
author_rank: Super Contributor
timestamp: March 16, 2020, 04:44:59 am
content: MPU6050 VDD is 3.3V (max 3.46V) not 5V and I do not see joy with a 5V MCU driving a 3.3V peripheral.

author: johankj
author_rank: Contributor
timestamp: March 16, 2020, 07:32:36 am
content: Your address pin is floating, it should be ground or 3.3. You may be addressing the wrong device as a result.CLKIN should also be tied to ground if using internal clock, you have floated it.Also, VDD is 5V tolerant, but VLOGIC needs to be +/-0.5V of VDD, which you have violated. Put 3.3V on VDD instead.FSYNC should be tied to ground too.Next time you should read the datasheet and follow the reference design.
Where is it or what is it - Page 1
Forum section: electronics / beginners

author: TorqueRanger
author_rank: Frequent Contributor
timestamp: May 09, 2013, 01:11:40 pm
content: I while ago some posted up a post on using a prototype board as a scale for stripping wires and the board was in shape of a triangle and can't seem to find it on here..

author: robrenz
author_rank: Super Contributor
timestamp: May 09, 2013, 02:11:54 pm
content: I thinkthis is it.

author: Skimask
author_rank: Super Contributor
timestamp: May 09, 2013, 02:32:44 pm
content: Oh that's good!Now where's my saw?And goggles?And ear protection?And gloves?And bunny suit?
where is  MD1000-390 datasheet or user manual? - Page 1
Forum section: electronics / beginners

author: ali6x944
author_rank: Frequent Contributor
timestamp: February 13, 2016, 03:25:11 pm
content: hi guys,i was playing around with this CRT model MD1000-390 and it works nicely, but when i want to display something on i didn't know how...so i googled it and i didn't see anything useful, it was only weirdo websites that sell these things or just massive tables full of other types of monitors ...where is MD1000-390 datasheet or user manual?some i found on the CRT info:model:MD1000-390service: 2303 0853electrical input: 0.8Amps full brightness@+12v dcmanufactured by: display technologies ,Inc.manufacture date: November, 1992https://drive.google.com/open?id=0B5vW-k7HbsL4bERFUnNRc2pCVEE

author: ali6x944
author_rank: Frequent Contributor
timestamp: February 13, 2016, 03:29:39 pm
content: anyone please help!

author: ali6x944
author_rank: Frequent Contributor
timestamp: February 14, 2016, 08:22:45 pm
content: please help!!!!!!!!

author: uncle_bob
author_rank: Unknown
timestamp: February 14, 2016, 08:35:17 pm
content: HiDoing multiple posts of the same question is probably not considered "good form".That's a really old CRT monitor (as I mentioned in the other thread). I'd start out as I outlined there.Bob
Where is the good heatshrink at - Page 1
Forum section: electronics / beginners

author: Mp3
author_rank: Frequent Contributor
timestamp: February 29, 2020, 11:49:49 am
content: I've been using cheap heatshrink off amazon for a long time, the kind with a bunch of pre-cut pieces in different sizes, and it is great when it is almost the size of the wire it's going on, but it's awful for things that aren't round or change in size/shape.I've been using the same heat gun for a long time, don't remember the model but it works very well. I have used it on smd rework and such.What heatshrink do the pros here use for situations like flat cables or something like that, instead of getting an awkward oval that doesn't conform to the shape of the wire/conductor?I also don't want to wrap it in kapton tape or something like that since it's messy and risks damaging the connection by trying to repeatedly feed tape around it.r

author: Jwillis
author_rank: Super Contributor
timestamp: February 29, 2020, 07:48:04 pm
content: There are heat shield kits .http://www.circuitmedic.com/products/201-3160.html. For flat cables use the heat shield blanket

author: aeberbach
author_rank: Regular Contributor
timestamp: February 29, 2020, 10:42:29 pm
content: I bought a kit from RS years ago, one of the best investments ever and probably cheapest option in the long run. Many sizes, heaps of heat shrink. Seems like good quality compared to some I have used.

author: Jwillis
author_rank: Super Contributor
timestamp: March 02, 2020, 06:07:19 am
content: Some times you might get the opposite problem occurring where the clamp or tweezers your using is drawing to much heat away and prevents soldering . Titanium is a really poor conductor of heat .There are titanium clamps and tweezers for that can help with some conditions. Titanium also makes good heat deflectors.

author: Cubdriver
author_rank: Unknown
timestamp: March 03, 2020, 08:32:30 am
content: I generally order it from McMaster-Carr.https://www.mcmaster.com/heat-shrink-tubing-Pat

author: Jwillis
author_rank: Super Contributor
timestamp: March 03, 2020, 03:09:52 pm
content: Damn My eyes . Sorry I thought you needed to protect from heat while soldering.For cables including ribbon cables I don't use heat shrink at all because it becomes to stiff to work with. Just use a flexible sleeve . Braided or non braided it's up to you.With sensitive wiring you can get conductive sleeving that you can attach to a ground .

author: thm_w
author_rank: Super Contributor
timestamp: March 04, 2020, 01:23:14 am
content: I can't see how you would heatshrink a flat cable and not expect it to pull inwards? Unless you have physical support at the edge of the cable to keep its shape. Post some photos and it may help get your idea across better.Some aliex sellers are cheap thin crap, some are good, so farthis sellerhas sent me decent stuff, but its 2:1.
Where to buy "cool panel stuff" in Ireland or the UK? - Page 1
Forum section: electronics / beginners

author: MarkDennehy
author_rank: Contributor
timestamp: February 05, 2016, 11:53:47 pm
content: So slightly odd project - you've probably seenthis homework deskandthe matching spaceship. I'm looking to build something similar for the toddler here, and I'm trying to source fun-looking panel controls and meters and the like (so it's slightly odd in that I'm building from the front panel back).I've scoured through aliexpress (and the arcade button packs look promising) and ebay.ie, ebay.co.uk and ebay.de for the "for parts" items in the test equipment sections with an eye to cannibalising the front panels, but does anyone have any suggestions for other places to take a peek at?Mostly I'm looking for things like analog panel meters, old-fashioned bulb lights, big clunky switches and so on. Touchscreen OLED 60" retina displays are nothing to a 3.5-year-old, but a 1964 vintage 8-position 12-pole wafer switch with an appropriately chunky knob and skirt wired up to a few small bulbs in old-school coloured glass panel housings? Fascinating

author: Richard Crowley
author_rank: Super Contributor
timestamp: February 06, 2016, 12:44:28 am
content: Do you guys have auto "wrecking yards" there in Ireland? That would seem like a possible source of funky switches and meters from vehicle dashboards. We have surplus electronics shops in many places where you can find random switches, indicators, meters, etc. Many started out as military-surplus shops back in the day. And places that sell auto accessories have lighted toggle switches, etc. for the after-market accessory crowd.
Where to buy a 3S battery - Page 1
Forum section: electronics / beginners

author: bgsteiner
author_rank: Contributor
timestamp: August 09, 2014, 05:23:26 pm
content: I recently bought a battery from hobby king which turned out to be a mistake, so while I am getting my money back I am looking for a new vendor for 3 cell lithium battery packs it doesnt need protection as I already have it ant I can create my own balance charging connection if needed.Any help is appreciated.

author: random13
author_rank: Newbie
timestamp: August 09, 2014, 05:42:55 pm
content: Depends on where you are, I guess.In the US, I have had good luck with Heads Up Hobby:http://www.headsuphobby.com/3-Cell-111v-Lipo-Batteries_c71.htmShipping is usually only $2.

author: prabhakaru
author_rank: Newbie
timestamp: June 07, 2017, 12:59:01 pm
content: I am not sure, whether they export it or not, last time I bought one from here-https://trendybharat.com/electronics/laptop/battery
Where to buy AMD Radeon laptop chips? - Page 1
Forum section: electronics / beginners

author: fubar.gr
author_rank: Unknown
timestamp: April 06, 2016, 04:23:09 pm
content: I am looking for a Radeon IGP 1027, the chip looks similar to this:http://i00.i.aliimg.com/img/pb/158/346/751/751346158_974.JPGI can't find it, or any AMD chip for that matter, on reputable sellers like Farnell, Digikey, Mouser or TMEIt is only available on ebay, alibaba and the like.How can I buy a chip like this from a reputable source?

author: alanb
author_rank: Frequent Contributor
timestamp: April 06, 2016, 04:42:57 pm
content: CPC - Farnell in the UK sell AMD chips, however I don't know if they have the particular one you want.http://cpc.farnell.com

author: Kilrah
author_rank: Unknown
timestamp: April 06, 2016, 04:45:11 pm
content: I'd be surprised if you can find anything other than recycled parts on eBay. This kind of things tends to go straight from chip manufacturer to equipment manufacturer and never be publicly available.

author: wraper
author_rank: Unknown
timestamp: April 06, 2016, 05:22:44 pm
content: Quote from: fubar.gr on April 06, 2016, 04:23:09 pmImpossible. The best you can get are factory rejects with missing solder balls which were later added by Chinese workers. But most likely you will get chips removed from the faulty motherboards.

author: fubar.gr
author_rank: Unknown
timestamp: April 06, 2016, 05:36:43 pm
content: Quote from: wraper on April 06, 2016, 05:22:44 pmWhy is that? Does AMD sell directly to manufacturers only?Where do all these laptop repair shops get replacement chips?

author: RGB255_0_0
author_rank: Frequent Contributor
timestamp: April 06, 2016, 05:50:49 pm
content: Quote from: fubar.gr on April 06, 2016, 05:36:43 pmDonor boards or Ali/Ebay etc. TSMC send them straight to AMD/OEM.

author: wraper
author_rank: Unknown
timestamp: April 06, 2016, 05:52:07 pm
content: Quote from: fubar.gr on April 06, 2016, 05:36:43 pmyepQuoteFrom the Chinese sewers. Well, there are some very rare exceptions, like manufacturer authorized service centers. But even they can get only some chips used on particular motherboards, and the only company I know which supplied them to their service providers (dunno if they still do) is Samsung.
where to buy electric motors from - Page 1
Forum section: electronics / beginners

author: atcosi
author_rank: Newbie
timestamp: December 26, 2010, 11:52:11 pm
content: I wanted to install a treadmill motor on a treadmill that was not designed with one, and I wanted to know where I can find online retailers. After a search on the net, I found several comments about the type of motor required. A DC motor about 2-3 hp, taking 80-260V DC. I am a little clueless about such things as speed control, the right kind of DC motor, how to convert speed to torque with gears and if that's necessary, finding the right power supply, how to install it on the treadmill, and any other issue I haven't thought of. Ideally I would like a product that solves the problem while costing much less than buying a new treadmill, say $AU200 or less.For future reference I would like to know sites where I can buy electrical and mechanical engineering products.

author: JohnS_AZ
author_rank: Frequent Contributor
timestamp: December 27, 2010, 12:07:26 am
content: This is one of my favorite surplus places on line, however it's in the US. They do have quite a few motors that would do the job however...I'd go to the thrift store and buy a use electric treadmill.https://www.surpluscenter.com/

author: GeoffS
author_rank: Unknown
timestamp: December 27, 2010, 02:17:14 am
content: I'd suggest eBay and look for someone getting rid of a treadmill. Motors by themselves seldom come up (this is eBay Australia)I'd recently been looking for a treadmill style DC motor to put in a lathe but couldn't find anything suitable/affordable.

author: Simon
author_rank: Unknown
timestamp: December 27, 2010, 09:13:03 am
content: yea, sounds like an awful lot of work, you'd be better just getting a motorized tread mill.

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 27, 2010, 10:20:24 am
content: most electric motors are speced in its torque T (Nm lb.ft etc) or power P (hp, watt etc). for ideal system (no loss):P = Fv (P in watt, F kg.g force, v speed m/s) or in rotational system itsP = pi.T.rpm/30if my math is correct in SI unit, for imperial unit, some reference...http://www.epi-eng.com/piston_engine_technology/power_and_torque.htmbut more toward mechanical power stuff there. but mech power should be the whats so called electrical power... i guess.so expect higher motor power when buying to compensate for energy loss (electrical and mechanical).for gearing, i'll try to sum it up as simple as possible. slowing down gears (smaller to bigger) means increasing pushing force, and vice versa ie increasing speed gear will reduce its circumferal/tangential force capability, but the torque (F.r) and power are still the same for lossless system which is of course do not exists.electrical power on the other hand... well:P = V.I (what else?)
Where to buy genuine RG400 with BNC? - Page 1
Forum section: electronics / beginners

author: FriedMule
author_rank: Frequent Contributor
timestamp: November 11, 2019, 06:28:15 am
content: Hi I know that it may be fairly easy to assemble coaxial but I prefer professional made cable, that I know works right when it's for measurements I can rely upon.I do also know that ebay, aliexpress and other sells a lot from China, but it sounds like a gambling to buy from these shops, have seen RG58 with only a single thin thread (maybe 30 AWG) and also seen cable where it turned out to be some cheap TV coaxial cable, sold as high end cables.I have looked at DigiKey and Mouser but I could not find RG400 with straight BNC male in both ends.Where do you buy from to be sure of quality?

author: Marck
author_rank: Regular Contributor
timestamp: November 12, 2019, 01:39:19 pm
content: I can recommend a couple of specialty cable assemblers in Australia but that might not help you so much. If you check with whoever the major antenna manufacturers are in your country they will be able to either supply what you need or point you in the direction. Here in Australia I use either QLD cables and connectors or rfshop.com.au. RFI will make custom cables but probably not in small batches.M
Where to buy high quality components? - Page 1
Forum section: electronics / beginners

author: P_M
author_rank: Newbie
timestamp: February 04, 2024, 09:54:33 pm
content: Hi.I’m about to recap my Yaesu FRG-7 and want high quality electrolytics, ie 105 deg C, 4000 hr plus. Mouser sell them, but is there anywhere I can buy such a small order such as these? 15 electrolytics at most.Thanks,Paul

author: Brad808
author_rank: Contributor
timestamp: February 05, 2024, 01:50:24 am
content: Yes, Mouser and Digikey are good places to order quality parts.

author: EggertEnjoyer123
author_rank: Frequent Contributor
timestamp: February 05, 2024, 09:35:43 am
content: You could try LCSC.Have had decent experiences ordering there.

author: Simon
author_rank: Unknown
timestamp: February 05, 2024, 12:28:33 pm
content: Please don't double post, it won't make you popular.https://www.eevblog.com/forum/repair/where-to-buy-high-quality-components/msg5316751/#msg5316751
Where to buy parts in Germany? - Page 1
Forum section: electronics / beginners

author: Vipitis
author_rank: Frequent Contributor
timestamp: December 02, 2019, 07:18:01 am
content: Hallo,I am looking for a few parts specifically:TRRS breakout, short USB C to USB A cable, pair of good18500 cells;Where is the best place to get those all at once with reasonable shipping price/time in Germany?Thanks

author: tooki
author_rank: Super Contributor
timestamp: December 02, 2019, 12:07:02 pm
content: Reichelt

author: Gerhard_dk4xp
author_rank: Frequent Contributor
timestamp: December 02, 2019, 01:28:54 pm
content: www.segor.dehttps://www.pollin.de/www.conrad.deMouser and Digikey are in the US, but transport is free @ > €50 and they are fast.regards, Gerhard

author: Vipitis
author_rank: Frequent Contributor
timestamp: December 02, 2019, 01:54:43 pm
content: thanks for the tips, I found a suitable USB C cable locally already. Had a small dear h through all mentions but no hit yet.I have been to the Conrad store in Düsseldorf a few times but haven't found any of the items I am specifically looking for. There weren't any TRRS breakout boards near the Arduino or Raspberry's and also nothing with their small selection of RC parts. All battery cells they had were 18650 not a single 18500.If I come by the store again, I will ask for it.Else I am just going to find some eBay listing that ships from Germany.

author: Vipitis
author_rank: Frequent Contributor
timestamp: December 02, 2019, 08:37:54 pm
content: managed to get the TRRS breakout on eBay.de with free shipping and for no cost due to an eBay 5€ gift code.Will source the cells when I see them.Thanks for helping here, not a part of the forum I have been to before

author: RoGeorge
author_rank: Super Contributor
timestamp: December 02, 2019, 08:43:33 pm
content: From EU, any country delivery:https://eu.mouser.comhttps://www.tme.eu/en/

author: thinkfat
author_rank: Unknown
timestamp: December 02, 2019, 10:05:52 pm
content: TME, reasonable shipping price and good inventory, though not as deep as Digikey or Mouser. Fast delivery, too.

author: ebclr
author_rank: Super Contributor
timestamp: December 03, 2019, 04:50:04 am
content: https://www.distrelec.de/

author: OE2WHP
author_rank: Regular Contributor
timestamp: December 03, 2019, 10:21:59 am
content: https://www.rs-online.com/

author: Vipitis
author_rank: Frequent Contributor
timestamp: December 03, 2019, 05:43:48 pm
content: wow, I got a scamming ad from TME on my phone.
Where to buy rolls of standed wire - Page 1
Forum section: electronics / beginners

author: lordvader88
author_rank: Frequent Contributor
timestamp: May 05, 2018, 01:25:38 pm
content: For big rolls of 16 and 18awg stranded automotive wire (or what ever but legit quality for ATX PSUs) I'll price stuff locally monday.But what about ebay from China, or is it all probably lower quality copper/insulation ? Anyone know a trusted wire dealer from Asia on ebay ?

author: tautech
author_rank: Super Contributor
timestamp: May 05, 2018, 01:28:58 pm
content: 50, 500 or 5KV rated ?

author: lordvader88
author_rank: Frequent Contributor
timestamp: May 05, 2018, 01:55:27 pm
content: nevermind delete this thread, local is fine

author: BradC
author_rank: Super Contributor
timestamp: May 05, 2018, 02:12:29 pm
content: Quote from: lordvader88 on May 05, 2018, 01:55:27 pmYou really shouldn't ask a question for which you don't want an answer. Threads don't get deleted just because you shot first and asked questions later.
Where to buy semi decent test leads for Oscilloscope - Page 1
Forum section: electronics / beginners

author: littlejon
author_rank: Newbie
timestamp: October 22, 2015, 12:14:33 am
content: Hi All,I am looking to find an Australian supplier of various test leads for my Oscilloscope.To start with I am after BNC->Aligator and BNC->BananaWhere do you go to buy your test leads?Cheers,Jon

author: tautech
author_rank: Super Contributor
timestamp: October 22, 2015, 12:28:37 am
content: Quote from: littlejon on October 22, 2015, 12:14:33 amJaycar stuff is suitable for basic work.

author: FlyingHacker
author_rank: Frequent Contributor
timestamp: October 22, 2015, 07:46:17 am
content: EPray has some cheap Chinese versions of these. Most of them are actually pretty decent for general use. I find these to be typically an order of magnitude cheaper than anyplace else.

author: tggzzz
author_rank: Super Contributor
timestamp: October 22, 2015, 08:45:46 am
content: Quote from: littlejon on October 22, 2015, 12:14:33 amThat can only be answered in the context of what you are measuring.The types of test lead you mention are suitable for audio frequency work, not much more.
Where to buy this chip or what equivalent to use? - Page 1
Forum section: electronics / beginners

author: Jane
author_rank: Frequent Contributor
timestamp: November 24, 2022, 09:11:03 pm
content: Could anyone advise where I can buyMSC 7101IDM - 2A High Voltage Synchronous Buck Converter ?The datasheet can be loaded herehttps://www.microsemi.com/existing-parts/parts/80066#resourcesOr what equivalent to use?That IC is used in external disk and I need to replace that IC because it is damaged.Thank you for help

author: m k
author_rank: Super Contributor
timestamp: December 03, 2022, 09:28:52 pm
content: eBay is selling.Get a dozen and make a test circuit.The picture I saw had a chip on a possibly plastic carper.I was able to pick three dozens.

author: mariush
author_rank: Super Contributor
timestamp: December 03, 2022, 09:58:50 pm
content: Richtek RT8284N runs at 340kHz like your chip and has same pinout :https://www.digikey.com/en/products/detail/richtek-usa-inc/RT8284NGS/3078368datasheet herehttps://www.richtek.com/assets/product_file/RT8284N/DS8284N-04.pdfSame for RT8292 :https://www.digikey.com/en/products/detail/richtek-usa-inc/RT8292AHZSP/3078373And another with same footprint, pinout and switching frequency, MP2307 :https://www.digikey.com/en/products/detail/monolithic-power-systems-inc/MP2307DN-LF-Z/5292007And another, MP1482 :https://www.digikey.com/en/products/detail/monolithic-power-systems-inc/MP1482DS-LF-Z/5291681LV58063 seems to have same pinout :https://www.digikey.com/en/products/detail/onsemi/LV58063MC-AH/4848070It's close enough frequency (370kHz instead of 340kHz) that would probably make other parts in circuit compatibleAnother very close one, Sanken NR855E :https://www.digikey.com/en/products/detail/sanken/NR885E/4289135Runs at 350kHz, slightly less maximum voltage (max 18v) and has same pinout but no COMP .. instead of COMP it's a NC pin.Seriously, not that hard to go in a store like Digikey, mouser, farnell/newark and filter by package type (soic-8) and then by frequency range to get some potential replacement candidates.

author: Jane
author_rank: Frequent Contributor
timestamp: December 10, 2022, 09:40:05 pm
content: Thank you for help
Where to buy wirebondable 1n5819/1N4148 diodes - Page 1
Forum section: electronics / beginners

author: AQUAMAN
author_rank: Regular Contributor
timestamp: October 22, 2018, 11:52:03 am
content: I need to buy some wirebondable diodes but I cannot find any distributorThe only one I can find is here:http://www.onchip.com/products/tvsesd-protection/But these are zener diodesI just need to buy some basic diodes like 1n4148 or 1n5819 in wirebondable formatDoes anyone know a distributor or a custom manufacturer who could make a batch of 500?

author: Marco
author_rank: Super Contributor
timestamp: October 22, 2018, 12:13:16 pm
content: Digikey hassome in stock, not 500 though and the price is scary.Googleshowssome brands producing them anda specialized distributor.

author: Jeroen3
author_rank: Super Contributor
timestamp: October 22, 2018, 12:16:08 pm
content: Nexperia makes tiny diodes for smartphones. Ask them.

author: jmelson
author_rank: Super Contributor
timestamp: October 22, 2018, 08:09:23 pm
content: Quote from: Marco on October 22, 2018, 12:13:16 pmI think the price is for a whole cassette - not clear how many die you get per cassette, though.And, these most likely only have one bondable terminal, the other is likely what you glue down with conductive epoxy.Jon

author: amyk
author_rank: Super Contributor
timestamp: October 23, 2018, 12:37:57 am
content: According to the datasheet, one wafer contains a little over 137k die. Perhaps the price is for one wafer, that puts the price per die in roughly the right range.