hybridfree/eevblog-posts huggingface dataset:
IKEA Solbana Powerbank Teardown - Page 1
Forum section: electronics / general

author: sled
author_rank: Contributor
timestamp: November 15, 2017, 11:55:17 pm
content: Stumbled upon some new products at IKEA this week, one of them is a power bank which looks and feels quite sturdy.Here are the specs on the package:Battery: Li-Polymer, 3.7V, 37Wh, 10'000mAhInput: 5V @ 2AOutput: 5V @ 2APrice: ~20USD here in Switzerland.Here's whats inside:Casing: Polycarbonate, overmoldedBattery: Pow-Tech (Manufacturer), PT925675 (Model), 2x 5000mAh, FCC Info:https://fccid.io/UL/SHENZHEN-POW-TECH-NEW-POWER-CO-LTDMCU: Holtek HT46R003B, Datasheet:http://www.holtek.com.tw/documents/10179/11842/HT46R003Bv100.pdfPower Management (?): AXV5TE, weird QFN package,could not find any info, hints appreciatedProtection: NTC mounted on the side of battery with yellow tape.Caps: Aishi, 25V, 47uFOther: SOT23-3 package with marking "J3", SOT23-6 package with marking "P203 / 1509", Silicon gunk to hold battery in place.Instructions how to open:1. Use a spudger and butter knife to remove back plate2. Use a spudger and butter knife to remove front plate3. Use spudger to break the overmolding on the sides (slide along the edges)4. Use butter knife on the edges to pry it open
The Signal Path Dino-Lite review - Page 1
Forum section: electronics / general

author: LaurentR
author_rank: Frequent Contributor
timestamp: November 15, 2017, 02:34:57 pm
content: Nice video by Shahriar with some cool chips under the microscope(s)However, I agree with several of the Youtube comments that this was a huge missed opportunity to make proper quantitative measurements and comparisons of lag between the USB2, USB3 and DVI/HDMI microscopes. There is even a nice shot of the external screen plugged into the DVI/HDMI camera and I was screening in head for him to move a pen or something else rapidly under the microscope to see the lag, but no...Shahriar, if you still have the cams, you may want to do some quick follow-up to help your fellow potential microscope usersLaurent
BGA inspection mirror - Page 1
Forum section: electronics / general

author: Harvs
author_rank: Super Contributor
timestamp: October 04, 2016, 08:00:02 am
content: Has anyone seen somewhere easy to buy something like this? Or even ideas for DIY?http://caltexsystems.com/products/bga-inspection-system/bga-inspection-mirror/As the new owner of an AmScope setup, I think a mirror like that could be really useful.

author: Gyro
author_rank: Super Contributor
timestamp: October 04, 2016, 09:27:04 am
content: A neat idea.You just need a first-surface mirror with the bottom edge ground down to 45'. You can often find first surface mirrors (front silvered) mirrors in scrap cameras (viewfinder) and laser printer optics. They do scratch easily though.

author: Harvs
author_rank: Super Contributor
timestamp: October 04, 2016, 09:46:34 pm
content: Ahh, "first surface mirror", that's the phrase I was missing.Doesn't look like they're "easy" to buy (as in I need to order internationally), but if one believes what they read on the net, it shouldn't be hard to remove the back coating off a normal mirror with acetone and use that.Might try with some cheap acrylic mirror first...

author: DTJ
author_rank: Super Contributor
timestamp: October 30, 2017, 01:29:12 pm
content: Harvs, did you ever find something to use as a mirror?

author: chhrisedwards
author_rank: Contributor
timestamp: November 11, 2017, 06:12:58 am
content: BGA inspection mirror alongside BGA allows for 90 degree inspection into BGA solder joints. Good for inspection J-leads, connectors, and 90 degree view of fine pitch. However, I want suggestion other than from BEST BGA Inspection athttp://www.solder.net/services/bga-x-ray-capabilities/

author: helius
author_rank: Super Contributor
timestamp: November 11, 2017, 07:37:50 am
content: There are many commercial borescopes with 90-degree heads. Depending on field of view they could be a cheaper way to see under BGAs.
Hexiwear Development Kit - Page 1
Forum section: electronics / general

author: ocw
author_rank: Regular Contributor
timestamp: November 11, 2017, 04:46:34 am
content: I just notice the Hexiwear development kit by MikroElektonika now being available from Mouser and Digi-key. See:https://media.digikey.com/pdf/Data%20Sheets/MikroElektronika%20PDFs/Hexiwear_Web.pdfThat and the associated docking station and click boards look interesting. See:https://learn.mikroe.com/hexiwear-user-manual/3/Both and other accessories are available in a pack:https://media.digikey.com/pdf/Data%20Sheets/MikroElektronika%20PDFs/Hexiwear_Power_User_Pack_Web.pdfDoes anyone have any experience with this?
Carbide 3D Nomad 883 Pro CNC / PCB Engraving Machine Review & Experiments - Page 1
Forum section: electronics / general

author: Hugoneus
author_rank: Frequent Contributor
timestamp: November 06, 2017, 04:52:45 am
content: You can watch the video here: [28 Minutes]youtu.be/bM6n-4-tWn0More videos at The Signal Path:www.TheSignalPath.com

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: November 08, 2017, 11:44:25 pm
content: I am a subscriber to The Signal Path so I have already viewed this one. In the video you mention the ultimate reason for obtaining the CNC is to mill RF strip line circuits for future video subject material. I am so excited about this and have a request. Is it possible to design and build a USB3.0 PHY side isolator? I have no idea if this is even in the realm of practicality but such a tool would desired by many.I have checked out integrated digital isolators like TI.'s ISO7631FM which seem to top out at 150 Mega bits per second and 7 nanosec propagation delay, and wonder if they are simply limited by chip process geometry or something more fundamental. Additionally a decapping teardown of one of these chips would also be an interesting video.As you can tell this subject area is way outside my range of expertise but I figure if anyone could do it it would be you.(me looking at Shariar's photo with wondrous adoring puppy eyes)
Soldering tools required for beginners - Page 1
Forum section: electronics / general

author: chhrisedwards
author_rank: Contributor
timestamp: November 09, 2017, 10:11:46 am
content: Hey Folks ...please help to get tools required for beginners.

author: nanofrog
author_rank: Super Contributor
timestamp: November 09, 2017, 10:25:35 am
content: In what sense? Recommendations? Donations?

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 09, 2017, 10:42:18 am
content: Dave did a couple of great videos on this:

author: sn4k3
author_rank: Frequent Contributor
timestamp: November 10, 2017, 03:52:59 pm
content: Quote from: chhrisedwards on November 09, 2017, 10:11:46 amThere are lot of cheap things you can buy, by cheap doesn't mean bad.To recommend anything maybe we need more information from you, like where you will use the tools or what is your focus. ex: Microsoldering, general repairs, hobby, others?About soldering station you can get good and quality stuff for cheap this days, please check:https://www.eevblog.com/forum/reviews/(tip)-best-budgetcheap-soldering-stations-and-tools/Cheap stuff and must haves: Flux, solder wire, desolder pump, desolder wick, tweezers, tip clean brass, soldering iron/station, Wire Cutter/pliers
So what's a decent but cheap ESD workbench mat? - Page 1
Forum section: electronics / general

author: cvanc
author_rank: Frequent Contributor
timestamp: November 14, 2017, 08:38:07 pm
content: I'm moving away from using my field rollup ESD mats on the bench at home, and want to get something more permanent. Looking for the thicker, cushioned stuff that is mostly seen in blue but I've seem similar in other colors too.Is this a total commodity these days, or are there specific brands to look out for? Ideally I'd like a small amount in bulk and will cut to size & add the snap fittings myself.Thank you.

author: progrock
author_rank: Contributor
timestamp: November 20, 2017, 07:20:17 pm
content: I'd love to get a nice one that didn't cost a fortune as well. Also want something that's got pretty high heat resistance for soldering on... not sure if this would be 2 separate layered mats, or just one. I'm guessing a good ESD mat that's also high temp resistant for soldering is not going to be cheap... unless you only need 2 square feet or something.

author: nanofrog
author_rank: Super Contributor
timestamp: November 20, 2017, 08:21:41 pm
content: Quote from: cvanc on November 14, 2017, 08:38:07 pmGiven what you're after, you need to be looking at 3 layer mats as they consist of the colored top (dissipative), carbon loaded middle layer, and finally the bottom layer for cushioning (vinyl).FWIW, the following link is the least expensive source I'm aware ofcanvu0_0. The seller and COO of the mat is Canada. And he carries both 2 & 3 layer mats (he'll even make a custom size if you need it).Quote from: progrock on November 20, 2017, 07:20:17 pmDefinitely not going to be cheap for a rubber ESD mat (2 layers at a minimum) vs. vinyl which melts very easily if you're using a soldering iron.

author: David Hess
author_rank: Super Contributor
timestamp: November 21, 2017, 06:48:41 pm
content: I used to have a roll of 3M black anti-static foam which I used for an ESD mat. It was more springy and less crushable than most anti-static foam and had the advantage that I could stick parts into it for both protection and to keep them in place.

author: eeviking
author_rank: Regular Contributor
timestamp: November 23, 2017, 09:03:54 pm
content: Watch out for cheap china mats. They will stink up the lab for ever with the infamous rubber smell.

author: floobydust
author_rank: Super Contributor
timestamp: November 24, 2017, 02:54:43 am
content: Sheet metal aluminium plate is what I have on some benches, especially the EMC testing area.Engineers like it, it doesn't melt. 3/16 and 1/4" thick. But a bit hard and scratches some stuff.Silicone rubber ESD mats are the best but very expensive and most employers/companies will only let you get cheap vinyl mats that stain with flux and melt really easy. Vinyl doesn't last.

author: cvanc
author_rank: Frequent Contributor
timestamp: December 07, 2017, 08:13:41 pm
content: Just wanted to give closure here, I contacted this vendor and obtained some nice new mats. Friendly emails about custom sizes and fast delivery.Thank you to Nanofrog for the suggestion.Quote from: nanofrog on November 20, 2017, 08:21:41 pm
Clicked a few buttons on my Bakon bk950d and now it won't solder. - Page 1
Forum section: electronics / general

author: Refrigerator
author_rank: Super Contributor
timestamp: November 06, 2017, 10:38:09 pm
content: I was doing some motherboard repair with my bk950d station and it felt like 300 wasn't quite hot enough but 350 was too much so i clicked around to see what i could do to maybe have something in between.It all ended up with me holding both up and down untill my station displayed some numbers that i started fiddling around with and i did something.... and it doesn't solder very well at all now.It still gets hot, i smoked a chip at 450C but as soon as i go do something on a mobo it just won't do it, i can just about do some solder wicking with 450C now, while before it was pretty easy even at 300C.And since i can't remember what exactly it was that i did i came here for some help, maybe someone knows how to restore defaults or has a PDF of the instructions?

author: pfrcom
author_rank: Contributor
timestamp: November 07, 2017, 01:46:23 am
content: https://img.banggood.com/file/products/20160120204733SKU245190.pdf
Groundet 5V Power Supply for Pi? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: November 05, 2017, 03:35:37 pm
content: HiSimple Question. Is there any Grounded 230V ->5V Power Supply for an Pi2?Maybe some who allow me to connect multiple Pi2 to?I tried 5 Consumer USB Power Supply and the Noise floor increased like hell.The Pi2 are in an Metal Case.
YH-305D Power Supply calibration procedure. - Page 1
Forum section: electronics / general

author: Kaptein QK
author_rank: Regular Contributor
timestamp: April 24, 2013, 11:31:34 pm
content: Here is a calibration procedure for the front panel meters:Potmeters (See picture, the blue ones) left to right:1- mA range gain.2- A range gain.3- mA and A offset.4- V gain.Current:1: Set power supply to mA range.2: Connect ampere meter.3: Set current to approx 1mA. (because the front panel meters does not show negative)4: Adjust current offset potmeter to let front panel show 1mA.5: Set current to 990mA.6: Adjust mA range gain potmeter let front panel to show 990mA.7: Repeat step 3-6 until satisfied.8: Set power supply to A range.9: Set current to 4.90A.10: Adjust A range potmeter let front panel to show 4.90A.Voltage:11: Set voltage to 30 V.12: Adjust voltage gain potmeter to let front panel show 30V.I could not find anything about calibration of this power supply on the net, so I started fiddling with the pots.Hope it is useful for someone.

author: jimw
author_rank: Newbie
timestamp: February 04, 2017, 11:19:09 pm
content: Thanks for posting this! I did a similar exploration (before I found your post) and had figured out 3 of the 4 pots. Got voltage and low range current pretty close, but was tired and quit before trying the high range. Now I know which pot to twiddle when I open it up again.I assume your "left to right" meant from looking at the front of the supply. As pictured from the inside, your numbers 1-4 go from right to left.Thanks!Jim

author: Kaptein QK
author_rank: Regular Contributor
timestamp: November 04, 2017, 02:23:09 pm
content: It is left to right as pictured.
Toyota HV inverter. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: November 07, 2017, 04:32:24 pm
content: I have a Toyota HV inverter. Given that the IGBTs is to the bottom of the inverter. Does anyone know what the module on the second picture is?Alexander.

author: tszaboo
author_rank: Super Contributor
timestamp: November 07, 2017, 04:41:06 pm
content: It is for a hybrid Toyota. They have 3 engines coupled together, one combustion, and 2 motor/generator, one smaller and one bigger. So you probably have two IGBT blocks.

author: NiHaoMike
author_rank: Super Contributor
timestamp: November 07, 2017, 04:45:35 pm
content: http://techno-fandom.org/~hobbit/cars/ginv/That appears to be some capacitors.

author: firewalker
author_rank: Super Contributor
timestamp: November 07, 2017, 05:09:00 pm
content: It probably capacitors, yes. Given a resistor (bleed resistor ?) across two terminals. Or it could be a boost converter in one packet?Alexander.

author: tszaboo
author_rank: Super Contributor
timestamp: November 08, 2017, 09:10:30 am
content: Quote from: NiHaoMike on November 07, 2017, 04:45:35 pmWell, strange looking capacitor then. Interesting article.
Question about Hakko 951 sleep function - Page 1
Forum section: electronics / general

author: jld
author_rank: Newbie
timestamp: October 29, 2017, 09:35:17 pm
content: I got a new Hakko 951 and am just getting it set up.I am either confused about sleep mode, or my unit is faulty. Hope you fine people can clear it up for me.I turn the unit on, with the iron in the stand. The display counts up to the set temperature (650°F in my case)I take the iron out of the holder and soldier a joint.I put the iron back in the stand and the display switches to "SLP"My question is that when I take the iron back out of the stand, the display does not switch back to the temperture, it just keeps saying "SLP".It says SLP until I switch the power on the base off and then back on again.Am I missing something? Do I have to touch the iron to a joint to have sleep mode turn off? Is there some setting I missing? Or is my unit just borked?Thanks!

author: Shock
author_rank: Super Contributor
timestamp: October 30, 2017, 11:39:02 am
content: Read section 6.2 of the manual it explains how it works

author: simone.pignatti
author_rank: Frequent Contributor
timestamp: November 01, 2017, 07:51:26 pm
content: this video may help

author: jld
author_rank: Newbie
timestamp: November 02, 2017, 02:21:32 am
content: Thanks. Interestingly, my unit has a very similar manual, but does not include instructions on setting the parameters.The issue I was having was due to the sleep cable only being half seated in the iron holder.All better now.Thanks.
New NEST Alarm System - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: November 01, 2017, 01:51:41 pm
content: I'm not a fan of nest, and it would be hilarious if this new system was hacked, please someonehttps://nest.com/alarm-system/overview/But from an engineering point of view I'm impressed by the sensor:

author: GreggD
author_rank: Regular Contributor
timestamp: November 01, 2017, 01:58:05 pm
content: Lots of BS claims without really saying anything.
Saike 852D++ Rework station & Clones! - Page 1
Forum section: electronics / general

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 28, 2017, 02:21:38 pm
content: Hi!I've just bought one of these for my home use & I'll begin with checking the case earthing, add DP mains-isolation switch, etc.I will be providing teardown pics, schematics and parts lists from what I find, but I've a few questions:-1) There's a whole plethora of different soldering-iron elements on fleabay (A1321, A1332, A1337, etc., etc.) - can anyone advise me which is the correct one to buy, likewise for the hot-air tool that comes with them?2) Can I use a zero-crossing triac on the **850 Hot-air control PCB?3) Can anyone point me in the direction of a Samsung MCU Programmer for these, and has anyone attempted to read-out, or been able to locate elsewhere on the net, firmware or source-code that all these Far Eastern thingys were born from?4) Is the front PCB compatible with the UniSolder 5.2 project?Another member pointed me in the direction of a UniSolder-compatible case as part of another make of station but I couldn't find one from a seller that ships to the UK, so I'll try again after November's pay-day!)Chris WilliamsPS!I've just realised I've got the "852D+" type and there's a "852D++" type that has automatic turn–on for the hot–air thingy!Rather than send it back with all the hassle entailed in returning the Great Banana Boat Motherland's Wonderful Electronic Toys, can you get an "upgrade kit" to convert the "852D+" to the "852D++" type separately, and if so, can someone post piccies or a link please?
Metcal Resource - Page 1
Forum section: electronics / general

author: Poe
author_rank: Frequent Contributor
timestamp: October 27, 2017, 06:36:46 pm
content: I had a hard time finding information regarding Metcal legacy products. Here's a spreadsheet and links.Hopefully it will save someone else time and/or correct my mistakes.http://www.okinternational.com/metcal/english/globalnavigation/resources/legacy-productshttps://www.eevblog.com/forum/reviews/metcal-resource/?action=dlattach;attach=364608
PE1005S Cameras, datasheet needed - Page 1
Forum section: electronics / general

author: Mjolinor
author_rank: Frequent Contributor
timestamp: November 22, 2017, 11:48:10 am
content: I am trying to find technical info about this camera. Specifically the pinout for the connector and a possible source for the expansion boards that are available.Searching will give me lots of hits and basic specification etc but if I am going to do anything with them I need more info.http://www.greentechcctv.com/en/products/pe1005s.html
Opinion on "Shattered Trust: When Replacement Smartphone Components Attack"? - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: October 21, 2017, 10:05:00 pm
content: Apparently, certain aftermarket smartphone components are now capable of being used in attacks against their security.https://iss.oy.ne.ro/Shattered.pdfAnyway, I thought this was of general interest as it challenges assumptions we might make about the security of various components.. i.e. parts.

author: amyk
author_rank: Super Contributor
timestamp: October 22, 2017, 02:29:39 am
content: Conspiracy theory: this is another part of a propaganda movement by big companies (like Apple et.al.) trying to shut down 3rd party repair.

author: Mr. Scram
author_rank: Super Contributor
timestamp: October 22, 2017, 02:34:23 am
content: It's common knowledge that hardware access pretty much means forfeiting security. This research seems to be stating the obvious.

author: cdev
author_rank: Super Contributor
timestamp: October 22, 2017, 01:42:51 pm
content: That is definitely what I thought of first, and one can certainly see the financial motivations behind their war on repair shops and repair alternatives.The profit margin they want on repairs and parts at Apple is beyond outrageous. Like $700 for a laptop display that costs $50 on ebay.Quote from: amyk on October 22, 2017, 02:29:39 am

author: stj
author_rank: Super Contributor
timestamp: October 22, 2017, 03:46:07 pm
content: just remember you have no reason to trust the manufacturers over security.if they arent putting persistant spyware loaders in UEFI bioses then they are putting it in phones as a "diagnostic aid" to "improve custommer experience"i wont use a fone without custom firmware,and i dont have any UEFI bios laptops.if i did i would be patching the hell out of the bios.

author: wraper
author_rank: Unknown
timestamp: October 22, 2017, 04:24:08 pm
content: Quote from: stj on October 22, 2017, 03:46:07 pmThat custom firmware contain god only knows what and IMO has higher chance for containing backdoor.QuoteThen you basically have no possibility to update them ever.

author: stj
author_rank: Super Contributor
timestamp: October 22, 2017, 05:01:10 pm
content: Quote from: wraper on October 22, 2017, 04:24:08 pm??explain that?

author: wraper
author_rank: Unknown
timestamp: October 22, 2017, 05:20:35 pm
content: 1. Unless you create your own custom firmware, there is no possibility to know there was no backdoor intentionally placed into it. Which is sometimes the case with apps and ROMs you download from internet.2. Show a modern non UEFI laptop.

author: stj
author_rank: Super Contributor
timestamp: October 22, 2017, 11:05:17 pm
content: well there is UEFItool for those - not reliable but a start.and maybehttps://www.openfirmware.info/Welcome_to_OpenBIOS

author: nidlaX
author_rank: Frequent Contributor
timestamp: October 23, 2017, 12:03:24 am
content: Quote from: stj on October 22, 2017, 11:05:17 pmIf you have looked into what boots OpenBIOS, then you should know thatQuote from: wraper on October 22, 2017, 05:20:35 pmis a rhetorical request. There are none.
SN100E vs SAC305 solder options - Page 1
Forum section: electronics / general

author: loki42
author_rank: Frequent Contributor
timestamp: October 01, 2017, 05:52:27 am
content: I'm looking for a solder for production use, rework of surface mount and some hole through, lead free (EU RoHS) only. Does anyone have a preference who's tried SN100C, SN100E and SCA305? Got a preference for manufacturer?Available from Arrow, Digikey or Mouser if possible.

author: wraper
author_rank: Unknown
timestamp: October 01, 2017, 07:11:29 am
content: I prefer SN100C for hand soldering. Joints are shiny unlike with dull SAC solders and much less dross occurs while soldering.

author: nukie
author_rank: Frequent Contributor
timestamp: October 23, 2017, 02:35:38 am
content: I use SN100C from Nihon Superior since 2011. 030 Flux is great.If you are in the USA try Superior Flux.https://www.hnflux.com/index.htmlI manage to secure some it's really awesome. The fluxed core wires is helpful but don't perform as well as fresh flux.
Use both T18 and T19 tips on Hakko FX-888 FX-600 FX-601 $5 part - Page 1
Forum section: electronics / general

author: capsicum
author_rank: Contributor
timestamp: February 12, 2017, 02:26:42 pm
content: I searched the forums and found no threads about T19 Hakko tips, and I searched deep into several of Hakko's international websites under multiple products.What i found through some logical deduction and cross referencing of incomplete parts lists is that the FX-600 and FX-601 are the same product and the 8801 and 8805 (handpieces for the FX-888 FX-889) are likewise the same product, with one minor part change for all of them. The part is labeled "tip enclosure" and consists of a flared tube and securing nut.Disclaimer,I have not mated any of them myself.The Hakko part numbers are:For T19 tips use B3720(tube&nut) or B5122(tube&nut)For T18 tips use B3730(tube&nut) or B3469(just tube) and B1785(just nut)Each part number is around $5 USA (in 2017) full retail straight from Hakko usa.I'm not sure why they have multiple part numbers for each, it may be old and new styling(speed holes, chrome grill?), or it could be simple disorganization within the company which is implied by their haphazard info and documentation.Much better than $75 for a whole unit.Anyway why switch at all?T18 are about 10g lighter and come in many styles. T19 having 10g more metal around the body have about 20% to 25% less thermal resistance and corresponding faster recovery rate.Attached Image is for the FX-888 handpiece.

author: tablatronix
author_rank: Regular Contributor
timestamp: October 19, 2017, 01:41:40 pm
content: sorry for the necropost, thanks for the infoI also noticed that they refer to these as type M and LHAKKO FX-8801? M type soldering iron for use with T18 tip seriesHAKKO FX-8805? L type soldering iron for use with T19 tip seriesAnd the flyer for the 889, says "NEW higher thermal capacity compared to previous tip series"Have you tried it yet ?

author: Shock
author_rank: Super Contributor
timestamp: October 20, 2017, 01:58:41 am
content: On this page:http://www.hakko.com/english/products/hakko_fx8801_8805_parts.html#productNavIt says:Use B5122 to change FX-8801 to FX-8805.The T19 are the larger capacity tips. You will also need to either calibrate your station or adjust the temp to compensate for the tips temp offset, which you should be doing for some T18 tips anyway.They also have some beefy tips in the T18 series, if you need that much thermal mass for doing big connections though a decent wattage mains iron works well.
Quality, Construction Standard & Safety of Inexpensive Chinese Equipment! - Page 1
Forum section: electronics / general

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 28, 2017, 08:14:32 pm
content: Hi!Mods,I'm beginning this topic so everyone can discuss, present and offer:–1) Pictures of Poor Construction standards, also examples of GOOD construction standards found in examples of Far Eastern pieces of electronic products, both T&M and more general!(Highlight each example with pictures and brief description)2) Opinions as what is good or bad in each case;3) Suggestions, again with descriptions, pictures, or circuit-extracts as appropriate, as how bad practices can be improved or good ones made better!I realize a lot of this is covered in teardowns/reviews, but I thought it might be a good idea to put these ideas like this into one easily found topic!Chris Williams

author: bd139
author_rank: Super Contributor
timestamp: October 28, 2017, 09:52:18 pm
content: Everything in my room is made in China. Some of it's good, some of it's shit!My washing machine is made in Italy and is really good. My car is made in Italy and is shit!Ergo I don't think it's specific to the location.

author: SeanB
author_rank: Super Contributor
timestamp: October 29, 2017, 07:07:33 am
content: They make good equipment, but often parts of the implementation are not so good. examples are using a 3 core mains cable to drive a 3 phase motor, using the red, white, green wires for phase feeds, but not having a protective earth connection aside from the inverter and the motor being bolted to the same chassis. As well using 0.5mm wire for this, on a 500W motor. Control equipment can be hit and miss, who has heard of an industrial voltage of 36VAC, the standards are 110VAC, 110VDC, 48VAC, 24VAC, 24VDC, and then line voltage either phase to phase or phase to neutral.

author: ralphrmartin
author_rank: Frequent Contributor
timestamp: October 29, 2017, 04:31:44 pm
content: OK, I'll bite. I have a MacBook made in China. The design is awful - when open, the front edge of the base has a really sharp edge, and after dropping it on my bare foot, I have a permanent scar to show for it. It's a real safety issue.Perhaps this wasn't quite what you had in mind though, I forgot you had the "inexpensive" word in the title...

author: bd139
author_rank: Super Contributor
timestamp: October 29, 2017, 04:37:39 pm
content: MacBook here as well. I haven’t dropped it on myself yet but it looks like I’ve been self harming after a while.

author: Bud
author_rank: Super Contributor
timestamp: October 29, 2017, 04:44:38 pm
content: Quality of Chinese EquipmentConstruction Standard of Chinese EquipmentSafety of Chinese EquipmentSounds like a tripleoxymoronto me.
Card reader with a buzzer - Page 1
Forum section: electronics / general

author: cole
author_rank: Newbie
timestamp: October 16, 2017, 08:21:23 am
content: Hello guys,It seems that this is a very good place to ask my concerns. So here it goes, I have been searching around the internet for a card reader with a built in buzzer. I was able to find this producthttps://www.lintechtt.com/product/rs232-magnetic-strip-card-reader-intelligent-light-buzzer-built/Do you think that this would do great in a business place. I have always wanted to put up this type of card reader. What do you think?

author: Nusa
author_rank: Super Contributor
timestamp: October 16, 2017, 08:31:53 am
content: Depends on what you want to use the buzzer for.Also, it may be different in your country, but around here the signs are clear. Won't be too many more years before cards don't have magnetic stripes anymore. The conversion to chips is well under way.

author: cole
author_rank: Newbie
timestamp: October 16, 2017, 08:46:46 am
content: Oh, I see. So they have this conversion to chips already? Maybe I would just try to search for other products as well. Hoping to find one soon.Thanks for the info Nusa.
Oculus Rift Development Kit 2.... Design files released to public (Altium) - Page 1
Forum section: electronics / general

author: bigdog989
author_rank: Newbie
timestamp: October 14, 2017, 01:04:39 am
content: Hi Everyone,First off I think most people groan at the sound of Oculus these days however this may be a little interesting to some.Im new to all this but I though some of you may be interested to check out facebooks Oculus Rift Development Kit 2 and all the design files.Facebook has released the files for software and hardware (Altium) here ->https://github.com/facebookarchive/RiftDK2I'd love to see Dave give us his thought on the design, but his a busy man so let me know what you think!
Which home automation interface should I use ?  - Page 1
Forum section: electronics / general

author: Mick157
author_rank: Newbie
timestamp: October 11, 2017, 07:48:25 am
content: Hi folksI'm looking for advice picking an interface for home automation control.If any of you have experience with any devices such as Alexa or Google Home , I'd love to hear your opinions or suggestions. Obviously it will come down to personal preference , so it would be great if anyone could share their experience with such device's and if they have any downsides, bugs or as Dave would say " traps for young players "I appreciate any feedback, be it good or bad.Cheers !

author: julianhigginson
author_rank: Frequent Contributor
timestamp: October 17, 2017, 01:51:36 am
content: what do you want to do? and how much work do you want to put in yourself?so many things exist that you could use in so many ways.as a bare minimum you could drive up the road and buy a bunch of things today like wifi light bulbs, and plug them in, get them on your network, and set them up with their manufacturers apps/accounts then maybe tie them into amazon/google for some kind of overall control capability...but do you want to do more than that?as well as just thinking about what you want to achieve, maybe also have a bit of a think about how you want things to behave if your net connection goes down for a day.I'd suggest for a start you could have a bit of a look at OpenHAB. this is a linux setup that basically runs on a local network device (pi will do it) it's designed to be very extensible so could connect to pretty much anything you want with a bit of work - also it will connect to the internet in various ways to give you remote control/monitor capabilities if you want that... while also giving you local control of your locally connected things, which would be good if you're trying to make lots of different things work together in specific ways.https://www.openhab.org/you could also get into node red. which AFAIK won't give you very much structure for home automation up front but is very flexible and very well supported for interfacing to all sorts of stuff... It's a generic message routing tool that you can use to build a system that runs across a bunch embedded linux boards and cloud services all together...https://nodered.org/
PCB Soldering kits? - Page 1
Forum section: electronics / general

author: kPATm
author_rank: Regular Contributor
timestamp: October 05, 2017, 01:44:15 pm
content: Hello. I recently started to get back messing with soldering. Iv just bought some new gear so I eager to start tinkering. I know the Bread board kits are easily available and pretty cheap. But Im looking to do some PCB component soldering.Iv seen a few Digital clock kits and they look good but is there any other kits you can recommend? Thanks

author: Ice-Tea
author_rank: Super Contributor
timestamp: October 05, 2017, 03:30:52 pm
content: You may want to check Boldport Club. Beautiful stuff, great to learn soldering.http://www.boldport.club/

author: Shock
author_rank: Super Contributor
timestamp: October 05, 2017, 08:03:56 pm
content: Here is a nice cheap ESR/LCR tester kit and afterwards you will have a handy testing tool that you can update the firmware on later etc. You can take your pick as there is many different designs to choose from, I liked this one as it has a simple layout and all components are easy to replace.https://www.banggood.com/DIY-Meter-Tester-Kit-For-Capacitance-ESR-Inductance-Resistor-NPN-PNP-p-929603.html

author: nanofrog
author_rank: Super Contributor
timestamp: October 05, 2017, 08:47:58 pm
content: Solder Practice Boardsavailable on eBay. They're mostly SMD projects (LED), but they're inexpensive and quite useful for practicing on.Another would beElectronic Kit. There's a lot more to sort through, but it also contains much more thru-hole projects. There's even a miniature Tesla coil plasma speaker kit for ~6.50 GBP shipped (here).Nixie clock kitsmight be a neat project too.If you don't care to use eBay, check other sources such as aliexpress, banggood, dx,...

author: neslekkim
author_rank: Super Contributor
timestamp: October 05, 2017, 09:41:53 pm
content: Look around onhttps://www.tindie.com/lot of stuff there are delivered as kits.

author: kPATm
author_rank: Regular Contributor
timestamp: October 06, 2017, 09:53:08 am
content: Thanks for the suggestions. Very much appreciated

author: sprintcarfan
author_rank: Contributor
timestamp: October 09, 2017, 10:45:20 pm
content: I assume you've seen the giant 555 or op-amp kits. There's not all that much soldering to be done, but at least when you're done you have something to play around with, or hang on the wall as 3D art.

author: kPATm
author_rank: Regular Contributor
timestamp: October 10, 2017, 10:48:01 am
content: I actually just watched that yesterday. Havnt a clue what its for or how I would use it :-)

author: kalel
author_rank: Frequent Contributor
timestamp: October 10, 2017, 10:52:11 am
content: Quote from: kPATm on October 10, 2017, 10:48:01 amIf you mean the 555 timer, here are a few circuits:http://www.555-timer-circuits.com/Most of those should work, but I'm not sure if the kit is meant to be actively used, or more as decoration.P.S. does anyone know the owner of this site? The forum seems down and I can't find any way to get in touch, I assume it's no longer maintained.
Recommendation for new eqipment (soldering station, desoldering, oscilloscope) - Page 1
Forum section: electronics / general

author: aabbcc
author_rank: Regular Contributor
timestamp: October 09, 2017, 01:36:44 pm
content: So I'm looking to upgrade my crappy 20 eur soldering station and am also in need of some other stuff. I’m mostly building synths (through hole compononents)• Soldering station, not looking to spend more then around 150 eur- Hakko FX88D- Aoyue 701A++ (this looks nice since it’s also fucntions as a desoldering station)- I-CON PICO• Desoldering station, I suck at desoldering and don’t want to further risk ruining another pcb or components, don’t really want to spend a fortune on this.• Osciloscope, I currently have a DIY kit; Velleman EDO09, do I need something with more firepower? If so Batterfly.com seems to have a good deal on a RIGOL DS1054Z+a Hakko FX-88D for 415 eur• Transistor tester, there are a bunch cheap DIY kits on banggood that I guess will fulfil my requirement of simply getting HFE and idds readings and match transistors, which one should I chose or doesn’t it really matter?-https://www.banggood.com/DIY-Meter-Tester-Kit-For-Capacitance-ESR-Inductance-Resistor-NPN-PNP-p-929603.html-https://www.banggood.com/DIY-M12864-Graphics-Version-Transistor-Tester-Kit-LCR-ESR-PWM-With-Case-p-997023.html?rmmds=search• PCB holder large enough to hold up to 50cm pcb or any other recommendation so I not constantly have to flip over the pcb and try to balance it one something while risking damaging already soldered components, not more than 50 eur.

author: Simon
author_rank: Unknown
timestamp: October 09, 2017, 04:29:46 pm
content: Please do not double post, it is simply insulting to people trying to help you and will ultimately get you banned.
DIY ERSA Tip & Tweezers Holder Stand w/Tools Slot for I-TOOL and CHIP TOOL VARIO - Page 1
Forum section: electronics / general

author: sn4k3
author_rank: Frequent Contributor
timestamp: September 23, 2017, 06:11:45 pm
content: After i bought an ERSA I-CON 1 i fell in love and sold it within 2 month's and bought a I-CON 2V, just because i need two tools and i love the i-tool from first day i start to use it.You can read more about and see my switch hack in post: ERSA I-CON2V (Port Switch Hack):https://www.eevblog.com/forum/reviews/ersa-i-con2v-(port-switch-hack)/msg1197874/#msg1197874ERSA equipement are high quality but one thing i can't found or like any is a tip organizer / holder. And ersa metal tip holder solution sucks and ugly plus expensive...That way i built one with my specs in mind and it also can be stacked on top for the i-con or other station.It also work for other tips like JBC for example, you can use it with or without the vertical copper bars, allowing you to use multiple tips brands.ERSA tips will snapfit the slot but i recomend that vertical bars anyway.Features1 x Vacuum Desolder Slot18 x Tweezers Slots2 x Tweezers Like Slots for other tools24 x Tip Slots With Hole or snap fitTips Compability List:ERSA I-TOOL (Series 102 for i-Tool soldering irons)ERSA CHIP TOOL VARIO (Serie 462)JBC C105 Cartridges(Will work with other tips, i just maked what i can test here, the tip hole is +/- 3.5mm wide)Photos:(0.35mm Layer Height)Look how beautiful, pratical and easy that stand looks, i can't live without him anymore as i have a big colection of tools and tips (more than shown on photo).Fell free to share and print, you can also suggest modifications or improvements.If you want this and don't have any 3D printer you can contact me and buy directly from me, at a color of your preference.I will print for you and shiped within one or two days max, worldwide.For more information please visit the published model:https://www.thingiverse.com/thing:2406919

author: sn4k3
author_rank: Frequent Contributor
timestamp: September 23, 2017, 06:15:34 pm
content: <Reserved>

author: kPATm
author_rank: Regular Contributor
timestamp: September 23, 2017, 10:38:18 pm
content: Nice Work

author: THDplusN_bad
author_rank: Regular Contributor
timestamp: October 06, 2017, 01:41:45 pm
content: Wow- impressive work, really. And finally a 3D-printed item I would like to have, tooSeriously, that looks amazingly useful. Thank you for sharing this with us.Cheers,THD+N_bad

author: sn4k3
author_rank: Frequent Contributor
timestamp: October 06, 2017, 02:26:32 pm
content: Quote from: kPATm on September 23, 2017, 10:38:18 pmQuote from: THDplusN_bad on October 06, 2017, 01:41:45 pmThank youI can tell you this worth all the print time and filament you put onIf you have any modification suggestion you can post them.I'm thinking make a slight larger version with one more row and top slots for x-acto tools.
Read out an Chinese BT Puls Oximeter? - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: October 03, 2017, 06:40:03 pm
content: This Year I got an Chinese Pulse Oximeter who have "just" an USB/ Serial Cable Interface.So my Mom want some Pulse Oximeter to. Maybe with BT who could be nice to read out with an Win Tablet.Hmm does anyone have an idea its possible or not to get the Data out of the Product?I guess the will use a Serial Connection over BT. (The also offer an Wifi Version.)

author: janekm
author_rank: Unknown
timestamp: October 03, 2017, 08:20:08 pm
content: I have before managed to decode the Bluetooth LE protocol of a Chinese pulse oximeter. It was fairly simple to do by watching which bytes in the packet changed with changes in the pulse rate.The model I decoded was a Jumper Medical one. I don't recall the details but it was easy.

author: Lord of nothing
author_rank: Super Contributor
timestamp: October 04, 2017, 10:26:27 am
content: Is there an HowTo for something like that?I wrote the Company an E-Mail but the have some Holiday (?!) and dont answer soon.Do you have an idea how the Wifi Version could work? I cant believe its possible to connect it with my upcomming Hotspot System.

author: coppice
author_rank: Super Contributor
timestamp: October 04, 2017, 10:37:24 am
content: Quote from: Lord of nothing on October 04, 2017, 10:26:27 amChina National Day is 1st October. Most people get a week off around that date.

author: janekm
author_rank: Unknown
timestamp: October 04, 2017, 01:35:17 pm
content: Quote from: Lord of nothing on October 04, 2017, 10:26:27 amBLE tends to be easier to decode than something like Wifi. BLE has a standard method for listing "services" and characteristics. A characteristic could be a single value (like heart rate, oxygenation level etc) but typically manufacturers will just send a whole "packet" of data instead and break it apart in their app. Still if you look at their app, see the values that it's reporting, then use a generic app like "LightBlue" or "NRF Connect" to see the actual data transmitted, it's often easy to see how the values are encoded.Wifi tends to be much more hassle, as there will be some process to connect the device to your router (many schemes for doing that) and then it will be set to send the data to the manufacturer's server, so intercepting it would need spoofing the DNS requests and setting up a proxy server / wireshark to listen in on the data being sent.

author: Lord of nothing
author_rank: Super Contributor
timestamp: October 04, 2017, 01:39:50 pm
content: ...The problem is I dont have any App. I dont know if the is public or now.The main problem with that Chinese Stuff is if the work good if the now work...Do you know what kind of protocol the could use for BT?I have an BT USB Dongle with an big "external" Antenna who I could use my BT Headset in your Apartment.
Teardown (no repair :-) of anti theft label - Page 1
Forum section: electronics / general

author: DuPe
author_rank: Regular Contributor
timestamp: September 27, 2017, 09:15:26 am
content: Was interested how they are build and now found an application for my USB microscope.Maybe images are of interest to someone else too.It seems to be dead already and dit not respond to any (primitive/Grid Dipper style) RF stimulus 1..50MHz.Other than the early versions they now seem to contain some RFID style elctronics.

author: Don Hills
author_rank: Regular Contributor
timestamp: September 27, 2017, 10:13:27 pm
content: Related:http://www.righto.com/2016/10/inside-rfid-race-timing-chip-die-photos.html

author: DuPe
author_rank: Regular Contributor
timestamp: September 28, 2017, 07:57:15 am
content: Great link to an amazing technology

author: helius
author_rank: Super Contributor
timestamp: September 28, 2017, 08:04:03 am
content: Some tags meant for retail are permanently killed by the deactivation station at the cashier. Others are reusable, for things like library books that should be reactivated. The principle is RF backscatter, which can now be used by active devices to transmit data, in some cases over quite long distances (multiple km!)

author: amyk
author_rank: Super Contributor
timestamp: September 29, 2017, 02:50:37 am
content: Quote from: helius on September 28, 2017, 08:04:03 amSome retail tags are rewritable, so you get a free RFID EEPROM with every purchaseGiving a whole new meaning to the phrase "cheap as chips"...
Stand alone Hot Air station recommendations please - Page 1
Forum section: electronics / general

author: kPATm
author_rank: Regular Contributor
timestamp: September 20, 2017, 02:42:50 pm
content: Well after my post about solder station recommendations I ended up going for the TS100 which as you know ISN'T a solder station :-)Anyway now Im looking at picking up a seperated Hot Air Station. I will probably wait till my birthday and ask the Mrs to get this so im not in a huge hurry. My budget is about £50. Thanks

author: daybyter
author_rank: Frequent Contributor
timestamp: September 20, 2017, 11:19:54 pm
content: One of those 858 clones?I got mine for about 30 bucks and it works great so far.

author: kPATm
author_rank: Regular Contributor
timestamp: September 20, 2017, 11:33:04 pm
content: Thats what Iv been looking at. Been going through the thread about custom firmware for these. Someone mentione that they bought a more recent model and it seems to be ok without the need for the costom FW??Im also prrety cautious about the grounding problems as tbh I wouldnt really know what to look for to make it safe

author: daybyter
author_rank: Frequent Contributor
timestamp: September 21, 2017, 02:43:21 am
content: I just checked with the continuity buzzer, whether the tip was grounded, and mine was ok.

author: kPATm
author_rank: Regular Contributor
timestamp: September 21, 2017, 05:53:27 am
content: Is the Youyue varient of the 858d supposed to be the better version?