hybridfree/eevblog-posts huggingface dataset:
US pricing for older equipment - Page 1
Forum section: electronics / general

author: Cncgeek
author_rank: Newbie
timestamp: June 29, 2016, 08:38:36 pm
content: Not sure if this is the right place for this question, but I'm not selling his stuff yet so I thought the buy/sell board doesn't need the clutter. I recently bought an auction lot of old test equipment, and was wondering about what it's worth. Here's what I got:18 Protek oscillioscopes model P-2620 20mhz CRO onscreen display of v/div and time base +measurement cursors. Made in Korea7 Tek 2225 50mhz CRO with Tek rolling stands1 Tek 2232 CRO with digital captureI paid 300US for the whole thing and would love to recover my money while keeping as much of the "good" equipment as possible.I also want to donate a few pieces to the local hacker space.If anyone has an idea of the value of these (I looked on eBay but prices varied wildly) I would appreciate some input.

author: rstofer
author_rank: Super Contributor
timestamp: June 29, 2016, 08:52:56 pm
content: eBay is going to set the price and you can just assume the low end of the spread. That's what they are worth.They're going to be a hard sell because modern equipment has so many more features. That's why you see multi-thousand dollar Tektronix scopes going for a couple of hundred bucks. Nobody wants the stuff.

author: GreyWoolfe
author_rank: Unknown
timestamp: June 29, 2016, 08:59:50 pm
content: For what is's worth, there is a local surplus store near me that has Kenwood Trio 20 MHz scopes for $30 each and they are sitting on the shelf.
B&K 1635 Power Supply Schematic ? - Page 1
Forum section: electronics / general

author: tecman
author_rank: Frequent Contributor
timestamp: May 14, 2011, 11:52:42 pm
content: Anybody have a schematic for the B&K 1635 power supply ?Have one as a hand-me-down and it crapped out. Power side is OKay, but something on the control board took a dump.paul

author: biffm17
author_rank: Newbie
timestamp: September 09, 2015, 07:47:04 pm
content: Hey there, did you end up finding a schematic for the 1635? I ran into a similar situation with mine... i found a user's manual but no help... thanks if you have it to share?

author: Stray Electron
author_rank: Super Contributor
timestamp: September 09, 2015, 08:14:10 pm
content: Add a schematic for B&K 1660 Triple Output DC Power Supply to the wish list!

author: bronson
author_rank: Regular Contributor
timestamp: June 29, 2016, 01:12:16 am
content: Any luck, Stray? (sorry for necroing this thread but it doesn't seem worth a new post... not yet anyway)I just inherited a 1660 with a broken slave supply. Opening er up shows she got fried pretty bad.The U401 14-pin DIP is shattered. Looks like a Harris logo on it. Other than that, it's just charred rubble.BD4?? (can't read due to the scorch marks, below the inner of the two black side-by-side electrolytics) is gone. Looks like someone packed it with explosives. It blew half its case into the jumper wire near it, where it fused into to the insulation.Looks like some traces were ruptured by heat under relay RL301. BD101 (big rectifier in lower left of board) is also showing scorch marks.If I can't find a little more info, this thing might be headed for the great lab bench in the sky.

author: bronson
author_rank: Regular Contributor
timestamp: June 29, 2016, 01:17:38 am
content: Here's a pic. For some reason the forum software wouldn't let me attach it to my previous post.

author: tautech
author_rank: Super Contributor
timestamp: June 29, 2016, 01:31:47 am
content: Quote from: bronson on June 29, 2016, 01:17:38 amYou'd have to use the Modify not Edit to have the Attachments options available.

author: bronson
author_rank: Regular Contributor
timestamp: June 29, 2016, 04:56:11 am
content: Huh, the PDF in the 1660 section on BAMA says "Instruction Manual"... But, wow, the last 7 pages are schematics!http://bama.edebris.com/manuals/b&k/1660/Well, this makes it a lot harder to dump this beast and keep my clear conscience.If anyone still cares about the 1635, it might be worth taking a look at the 1660's schematics. Their respective calibration procedures call out different part numbers but the procedure itself is very similar. There might be a fair bit of overlap between the two.
Looking for Distributed Element software - Page 1
Forum section: electronics / general

author: mafio
author_rank: Contributor
timestamp: June 22, 2016, 11:23:02 pm
content: I am looking for freeware for Distributed Element design. (or just for kicks non freeware could work too)The only thing I could find was delinked FilterDE: Free Software for Distributed Element Lowpass and Bandpass Filter Designhttp://www.rfcafe.com/miscellany/homepage-archive/2014/FilterDE-Distributed-Element-LPF-BPF-Design.htmAny suggestions?

author: nctnico
author_rank: Super Contributor
timestamp: June 22, 2016, 11:32:00 pm
content: I while ago I wrote a tool to convert elliptic lumped element filters into microstrip structures. The price is 35 euro. See:http://nctdev.nl/page_pg%3d17.htmIf you are into microstrip filter then I can highly recommend the book 'microstrip filters for rf/microwave applications' written by 'Hong'. For most filter types (but definitely not elliptic filters) you can probably make do using an Excel sheet.

author: grouchobyte
author_rank: Regular Contributor
timestamp: June 25, 2016, 04:27:38 am
content: This is very sweet tool, but is unfortunately NOT freeNuHertz FilterSolutions was originally developed in the UK many years ago, but someone bought them a few years back....AWR, I recall....clever folks, those brits!@grouchobyte

author: mafio
author_rank: Contributor
timestamp: June 28, 2016, 06:40:43 pm
content: That's lookin like a nice option.http://www.nuhertz.com/cgi-sys/cgiwrap/netshine/reg_free.pl
Bloom Box - Alternate Engergy or not?? - Page 1
Forum section: electronics / general

author: ADC-1995
author_rank: Regular Contributor
timestamp: June 25, 2016, 01:29:01 pm
content: I did a search and didn't see anyone discussing this evolving technology. The guy that designed it, a NASA engineer, claims the Bloom Box grid that runs his factory could power 600 homes. The Bloom Box works by having a 'cell' sandwiched between two different types gases. It is claimed that when the gases pass over the cell a 1 volt charge is created and when stacked the voltage compiles. After digging around I found a clip of someone claiming the discharge gas is carbon dioxide and the Bloom Box fuel cell would cost about $600,000-800,000 each. It doesn't sound like it was designed for your average home or is this a tactic. I am not sure if this is like many other 'World Changer' ideas that fizzle out or are debunked.Key things are left out such as how is the gas directed, how much gas is used to power it, whats the volume, etc... which leads me to believe this would get you off grid but the cost would be so high it would be pointless.here is the link to the most current video:

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 25, 2016, 05:54:29 pm
content: Looks like another fuel cell to me. It works but isn't economical right now.

author: Delta
author_rank: Super Contributor
timestamp: June 25, 2016, 08:04:59 pm
content: Hydrocarbon gas + oxygen = energy + CO2! What a revolutionary idea! Good job we have an infinite supply of hydrocarbons and there are no issues with discharging CO2 into the atmosphere....

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: June 25, 2016, 08:30:54 pm
content: It's a fuel cell powered by natural gas. So yeah, it works. Otherwise, doesn't help at all.Well, some business types might enrich themselves by it.

author: helius
author_rank: Super Contributor
timestamp: June 25, 2016, 08:31:06 pm
content: Quote from: Delta on June 25, 2016, 08:04:59 pmIndeed, there are these things called "biofuels" that work exactly as you have described.To the OP: Bloom Boxes are used in datacenters as a backup power generation system that can potentially deliver cleaner power (both in electrical and pollution senses) than internal combustion generators.

author: Brumby
author_rank: Unknown
timestamp: June 28, 2016, 03:54:30 am
content: They're quiet, too.

author: Zero999
author_rank: Super Contributor
timestamp: June 28, 2016, 09:57:23 am
content: Quote from: Delta on June 25, 2016, 08:04:59 pmThe difference is the energy is normally heat and the most common way to convert it to electrical energy, is to use a heat engine which is limited to the Carnot efficiency. A fuel cell could in theory convert the energy released from oxidation directly to electrical energy with an efficiency much greater than the Carnot efficiency off a heat engine powered by combustion of the same fuel.
Practice Exam (Maths and Physics Relevance) - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 28, 2016, 08:20:07 am
content: Unexpected guest appearance at around 8 min:

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 28, 2016, 09:24:12 am
content: How in the heck do you draw the intersection to the interior of a circle?...Other than the, typo I'd guess, that was pretty goodI suppose they didn't insist on any special rigging for the guest appearance? Authenticity and all.Tim

author: Brumby
author_rank: Unknown
timestamp: June 28, 2016, 09:52:34 am
content: At least you got a mention in the credits!
Planar EL displays, what are they worth? - Page 1
Forum section: electronics / general

author: Buriedcode
author_rank: Super Contributor
timestamp: June 26, 2016, 04:51:53 pm
content: Hi there,Going through my "inventory" (thats a polite term, its ultimately just crap I've bought over the years thinking 'I could use that!' and never do..) I found several Planar EL displays. Specifically:EL.320.256.FD6 x 3EL480.240.PR2 x 2and a lovely EL.640.480.AF1.At least one of the 320x256 ones has burn-in - visible on the test pattern, or when I turn every pixel on, and all are used. The 480's and the 640x480 have retrofitted resistive touch screens attached, that are functional.However, the larger 640x480 AF1, whilst it appears to have been reworked (crystal oscillator replaced by an integrated oscillator, with kynar wire) I cannot see any burn in, and all pixels are functional and the same brightness. Doesn't have any marks around the mounting, board is clean (aside from said modification) so it appears that it is hardly used.I have seen these go for a fair bit of money but of course, being rather 'niche' and with LCD/TFT's becoming more suitable for industrial settings over the years I fear it isn't worth that much. Then again, for repairs/replacements for existing equipment that use these displays it might be worth something to someone. Ebay has several EL displays going for anywhere between $500 and $990 US and apparently has sold them.So, just throwing this out there for anyone who has worked on equipment that uses these, or knows about suppliers - would it be worth the effort to sell the 'good' one ? I may keep one of them for some retro-cool looking display project, but I can't see me using more than one. Pictures available if requested.
µcurrent Status? - Page 1
Forum section: electronics / general

author: jose347
author_rank: Contributor
timestamp: May 24, 2016, 03:04:58 am
content: What is the current status regarding the availability of the µcurrents?

author: EEVblog
author_rank: Unknown
timestamp: May 24, 2016, 03:11:57 am
content: Currently out of stock due to several issues, lets just leave it at that for now.

author: station240
author_rank: Unknown
timestamp: June 25, 2016, 05:25:36 pm
content: I'm imagining the Brexit result, UK leaving the EU, is going to create some extra issues as well.Using Sparky Lab's as EU distributor isn't going to be an option for much longer.

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: June 27, 2016, 04:26:56 am
content: Quote from: EEVblog on May 24, 2016, 03:11:57 amSpill the beans m8aroo ;^)
Buying from Arrow - exchange rates - Page 1
Forum section: electronics / general

author: splin
author_rank: Frequent Contributor
timestamp: June 25, 2016, 08:44:47 pm
content: I'm on the US website,www.arrow.com. My cart contains only items which will ship from the USA to the UK. I've selected GBP as the displayed currency and secure checkout shows a total, plus shipping costs in £UK. If I place the order will it charge the figure shown to my credit card or will it actually bill me in $US? I can't find anything in the terms and conditions.Given the recent shenanigans with the £/$ exchange rate, this is quite important!

author: tautech
author_rank: Super Contributor
timestamp: June 25, 2016, 09:20:54 pm
content: Just like when you use PayPal for any overseas purchases you'll get an exchange rate conversion to your local currency. Just how bad that will be depends on you card provider, probably better than a PayPal conversion.
Where can I get the parts for this connector to make my own? - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: June 24, 2016, 02:16:05 pm
content: Alright, not actually me, but someone who needs the matching part of this connector and their own pins to make their own setup for it. Figured someone here would recognize it and might have mouser/digikey/ebay links.

author: chris_leyson
author_rank: Super Contributor
timestamp: June 24, 2016, 02:28:12 pm
content: It looks like a JST connector, what's the pin pitch ?

author: bktemp
author_rank: Super Contributor
timestamp: June 24, 2016, 02:32:13 pm
content: Maybe Hirose DF13?

author: chris_leyson
author_rank: Super Contributor
timestamp: June 24, 2016, 02:46:54 pm
content: Took another look at the photo, looks like its 1.25mm pitch, I think it's a Molex Picoblade clone as the body colour is different to the Molex parts. Molex P/N 53398-1071. You can buy plugs and pre-crimped wires. Wurth is one maufacturer that make identical parts. PDF of a the 3D model attached.
Looking for EUROTHERM 039 millivolt source and thermocouple simulator - Page 1
Forum section: electronics / general

author: Al_Niz
author_rank: Newbie
timestamp: June 06, 2016, 10:21:28 pm
content: Hi,i am a student of electrical engeneering from germany where i bought an eurotherm 039 millivolt source from a flea market. but i can find the user manualif any body has one it would be nice to publish a copy. or if any body can tell me smoothing about the accurency of the millivolt source. I also found that it is an thermocouple simulator and i dont know how to use it or for what it is good forthx a lot

author: lowimpedance
author_rank: Super Contributor
timestamp: June 07, 2016, 01:08:01 am
content: Im guessing that during your searches you found that EUROTHERM made temperature controllers for ovens furnaces process control etc. So this simulator was probably used to test the temp. controllers by 'simulating' the characteristic transfer of various types of thermocouples, (rotary switch selectable), at different temperatures by changing the thumbwheel switches. Interesting bit of kit.Sorry no manual or how stable the source is though, do you have access to a good DMM you can test it?.Have you tried contacting the parent company in the UK, you might get lucky for a user manual.

author: Vgkid
author_rank: Super Contributor
timestamp: June 07, 2016, 04:22:49 am
content: Take the top cover off, that will be a start.

author: Al_Niz
author_rank: Newbie
timestamp: June 24, 2016, 08:44:13 pm
content: hi,I finally got a user manual thx guysi did like lowimpedance sad.
Spreadsheet Calculation Bug [excel, oo] - Page 1
Forum section: electronics / general

author: garboui
author_rank: Regular Contributor
timestamp: June 23, 2016, 10:45:19 pm
content: Today I was calculating a table of values with excel. No real complex match just a little multiplication and division. When I got to the last column to calculate all decimals were gone and the numbers look to be products of integer math. At first i thought this was a bug with Excel, but it seems it may be widespread.I have tested this on Excel 2010, 2013 and OpenOffice 4.1.1, all give the same result. If i change the 1200 in the last formula to 1201 it works, making it 12 then multiplying it by 100 (or 20 and 60, etc) in another column yields the same result. Changing formatting has no effect. Googling has not seemed to turn up anything on this as a bug that people have experienced. It is much more different than the 65536 bug in 2007.As people may be cautions of downloading spreadsheet files i have attached a picture of the 4 columns with the formulas above.https://dl.dropboxusercontent.com/u/65178473/no%20decimal.xls

author: SL4P
author_rank: Super Contributor
timestamp: June 23, 2016, 10:55:51 pm
content: Post the sheet. (With all macros etc removed)We're grown ups... if anyone inherits a disease in this day and age - they deserve it for poor doc & malware management.

author: garboui
author_rank: Regular Contributor
timestamp: June 23, 2016, 10:59:07 pm
content: Definitely no macros. Just a plain .xls saved from OO. Fixed the pic and the dropbox link too.

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: June 23, 2016, 11:38:51 pm
content: So you are wondering why the number in column D has no decimal places right? If you rearrange the equation for column D in terms of values from the other columns you get:D# = 1200/(B#+C#), where C# = (A#*B#)/(1.2-A#)If you substitute C# into the first equation and make B# 10 you should see that:D# = 120-100*A#So if A15 = 0.13 this would make D15 = 107, which it isTL;DR calculations have no problems, they just simplify to give exact numbers
Multimeter - Tips & Tricks - Page 1
Forum section: electronics / general

author: lapm
author_rank: Frequent Contributor
timestamp: June 23, 2016, 04:54:09 pm
content: Your either early or late for april fools day

author: bitseeker
author_rank: Super Contributor
timestamp: June 25, 2016, 07:01:12 am
content: None of my meters can do all that. See, things were made better back then.I gotta try one of those kilomicrometers. I think his had a Megamicrometer too.
Let's play association game! - Page 1
Forum section: electronics / general

author: ZeTeX
author_rank: Frequent Contributor
timestamp: June 22, 2016, 06:41:26 pm
content: So the game is very simple, I write a word, and you have to reply with the first word that comes to your mind, it cant be longer then a word.E.g:Me: resistorPerson: capacitorAnd so on..I'll Start:feedback

author: xrunner
author_rank: Super Contributor
timestamp: June 22, 2016, 06:42:06 pm
content: loop.

author: ZeTeX
author_rank: Frequent Contributor
timestamp: June 22, 2016, 06:43:20 pm
content: annoying

author: xrunner
author_rank: Super Contributor
timestamp: June 23, 2016, 01:51:11 am
content: eye

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: June 23, 2016, 02:01:58 am
content: ball

author: Brumby
author_rank: Unknown
timestamp: June 23, 2016, 02:04:27 am
content: bearing

author: jtstowell
author_rank: Contributor
timestamp: June 23, 2016, 02:25:07 am
content: compass

author: Skimask
author_rank: Super Contributor
timestamp: June 23, 2016, 03:14:19 am
content: rose

author: Kirr
author_rank: Regular Contributor
timestamp: June 23, 2016, 06:02:53 am
content: Now it's a truth moment. Will this continue with "-> smell -> bullshit" or with "-> thorn -> butt"?
PL2303 - any chance this chip is legit? - Page 1
Forum section: electronics / general

author: mich41
author_rank: Regular Contributor
timestamp: June 22, 2016, 07:40:20 am
content: I recently found this nice chip in one device. No Prolific logo, but the date code suggests 2005 so I wonder - did PL ever mark their chips like that in the past or is it obviously a knockoff?

author: dannyf
author_rank: Super Contributor
timestamp: June 22, 2016, 10:09:31 am
content: Prolific is nasty in that they would not provide drivers for older chips, like hx or hxa on newer platforms - you have to hack it to get them to work.Now a days, if I have to go down the usb-ttl route, I go with ch340.

author: mich41
author_rank: Regular Contributor
timestamp: June 22, 2016, 10:52:38 am
content: According to one migration guide I found, HXB and HXC had been discontinued a decade ago, even before the (older) HXA. No wonder you can't find them, but they certainly did exist.I'm just surprised by this chip's marking and curious if my specimen is simply a counterfeit or if Prolific really used different markings back in 2005. Unfortunately, the PL2303-series datasheets I found from that era don't show example markings.
N.O.S. Audio MOSFET pairs, 2SJ162, 2SK1058 - Page 1
Forum section: electronics / general

author: CJay
author_rank: Super Contributor
timestamp: June 22, 2016, 09:14:07 am
content: Found a bag of complimentary pair 2SJ162/2SK1058 audio MOSFETs I bought more years than I care to remember ago to repair a 1KW PA amp.Needless to say it wasn't those at fault or I'd have used them so they've lain unused in an antistatic bag ever since.Do they have resale value?

author: dannyf
author_rank: Super Contributor
timestamp: June 22, 2016, 10:00:59 am
content: Some of the best power MOSFETs specifically designed for audio or linear application, unlike the verticals. Practically indestructible due to its positive tempco.10usd each, easily.

author: Groucho2005
author_rank: Regular Contributor
timestamp: June 22, 2016, 10:29:50 am
content: I still have a bunch of the first gen 2SK134/2SJ49 pairs which I bought in the late 80's. I should really build a nice amplifier with those.

author: CJay
author_rank: Super Contributor
timestamp: June 22, 2016, 10:45:28 am
content: Quote from: Groucho2005 on June 22, 2016, 10:29:50 amThe metal can ones? I've got an old unused PCB for a Maplin MOSFET amp sitting in the same box I found the MOSFETs in.The PCB is for one of these amps:https://www.southampton.ac.uk/~apm3/diyaudio/Maplin_MOSFET.html

author: Groucho2005
author_rank: Regular Contributor
timestamp: June 22, 2016, 10:50:00 am
content: Quote from: CJay on June 22, 2016, 10:45:28 amYep, TO-3.

author: CJay
author_rank: Super Contributor
timestamp: June 22, 2016, 11:19:32 am
content: Quote from: Groucho2005 on June 22, 2016, 10:50:00 amVery nice, I made a wedge of money from using those transistor in Maplin modules and building them into mobile DJ kit, I designed my own boards for a dual amp but it worked out cheaper by a large margin to just buy kits.
Crosley component turn table review and teardown - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: June 18, 2016, 04:32:33 pm
content: Let down by poor materials, poor construction and poor assembly, using the lowest cost plastic to manufacture it. Funny thing is the best quality parts in there were the semiconductors, they were made to an exacting standard, and were capable of so much better performance than the cheap construction allowed.Then the turntable bearing, made way better than cheap, and survived ultra high speed and operation with massive unexpected side loading till the chipboard chassis broke loose and released it.

author: karoru
author_rank: Regular Contributor
timestamp: June 22, 2016, 09:51:23 am
content: It always amazes me that in year 201x someone still designs a product with a belt instead of direct drive.
For Star Wars lovers - Page 1
Forum section: electronics / general

author: RobertoLG
author_rank: Frequent Contributor
timestamp: June 18, 2016, 02:14:58 am
content: Hologram Vinyl - Star Wars TFA Soundtrack (in 4K)https://youtu.be/aEbAaL7fPl4

author: Brumby
author_rank: Unknown
timestamp: June 18, 2016, 02:49:39 am
content: Now all we need is to have it play the full movie - in holographic 3D!

author: German_EE
author_rank: Super Contributor
timestamp: June 18, 2016, 07:52:44 am
content: They REALLY missed a trick here. One of the holograms should have been Princess Leia delivering her message as she bends over to turn off R2D2 in 'A New Hope'.
Other cool Gadgets like the arduboy and c.h.i.p - Page 1
Forum section: electronics / general

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 16, 2016, 09:34:45 am
content: anybody know of cool gadgets like these i love things like these i have just pre ordered both of them and looking too see if there are other cool gadgets that are cheap

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 17, 2016, 01:10:08 am
content: Anybody know of anything just that I have a visa gift card I won that is going to expire this month and I need to use the remains 88.29nzd on it

author: edy
author_rank: Super Contributor
timestamp: June 17, 2016, 05:57:26 am
content: I actually backed Pocket C.H.I.P. and then when I realized I had paid over $100+ for what started off as a $9 computer, I backed out. Now they are selling it for $49? And even when not on sale $69? During the campaign was priced higher than it is now. I start to wonder why should I back any campaigns when things like this happen?https://getchip.com/pages/pocketchip

author: sony mavica
author_rank: Frequent Contributor
timestamp: June 17, 2016, 06:19:37 am
content: Quote from: edy on June 17, 2016, 05:57:26 ami was thinking of getting the pocket chip but seeing as i have a little Bluetooth keyboard and portable dvd player i can hook the c.h.i.p to the av in and use the usb port on it to power it so i decided just to go with the pocket c.h.i.p i would have got the pocket chip if it was cheaper
GEL Battery position ? - Page 1
Forum section: electronics / general

author: maxmbedded
author_rank: Contributor
timestamp: June 15, 2016, 11:43:00 am
content: Hi,I am developing a project witch use Sealed Battery (GEL) from Ultracell (ref. UCG-22http://ultracell.net/datasheets/UCG22-12.pdf).The height of my enclosure is smaller than the battery. So I would like to know if I can safely use this kind of battery in a different position than standing ? ?

author: bitslice
author_rank: Frequent Contributor
timestamp: June 15, 2016, 01:06:25 pm
content: yeshttps://en.wikipedia.org/wiki/VRLA_battery

author: maxmbedded
author_rank: Contributor
timestamp: June 16, 2016, 07:37:40 am
content: From Wiki page :"... Unlike a flooded wet-cell lead-acid battery, these batteries (GEL battery) do not need to be kept upright ..."Thank you. It answered my question !RegardMax

author: SeanB
author_rank: Super Contributor
timestamp: June 16, 2016, 01:28:00 pm
content: Just remember that a non recommended position is with the vents down, as then you will lose electrolyte on any slight overcharge, and will be dumping corrosive sulphuric acid into the enclosure. Also remember that any overcharge will result in loss of capacity as the cells vent vapour, so pay attention to charge and float voltage, especially the requirements to reduce the float voltage with temperature rise. Otherwise the battery will have a short lifetime in use.

author: Red Squirrel
author_rank: Super Contributor
timestamp: June 16, 2016, 01:54:05 pm
content: I'd do my best to keep it upright or use a smaller battery, but you CAN use it sideways, and some UPSes even do it.
OLED - Page 1
Forum section: electronics / general

author: Jane
author_rank: Frequent Contributor
timestamp: June 14, 2016, 07:30:32 pm
content: Can anyone advise where I can buy OLED with a specification like thishttp://www.visionox.com/en/color_js.aspx?cid=219?I would need about 10 pcsThanks

author: MLXXXp
author_rank: Frequent Contributor
timestamp: June 14, 2016, 07:34:50 pm
content: http://www.buydisplay.com/default/serial-spi-color-0-95-inch-oled-display-module-96x64-pixels-ssd1331

author: Jane
author_rank: Frequent Contributor
timestamp: June 15, 2016, 10:15:39 am
content: Thanks for the link. But it is a different manufacturer. Do you think that it will work and the IC drivers are the same?

author: MarkF
author_rank: Super Contributor
timestamp: June 15, 2016, 11:06:22 am
content: I have a breakout board from Adafruit with it's big brother (the SSD1351). It's easy to program (I'm using PIC microcontrollers). I wrote my own driver in C within a week. The most difficult part is creating a font.

author: MLXXXp
author_rank: Frequent Contributor
timestamp: June 15, 2016, 04:16:13 pm
content: Quote from: Jane on June 15, 2016, 10:15:39 amYou asked for a part that matched the specifications, not the exact part made by a specific manufacturer.I couldn't find the driver IC used for the part that you linked to. If it uses the SSD1331 then the drivers should work. I also couldn't find the connector pinout for your part. The number of pins and the pinout may be different between the two.

author: MarkF
author_rank: Super Contributor
timestamp: June 16, 2016, 12:55:11 am
content: Attached are the specifications for the SSD1331 with its command set. Also attached the schematic of Adafruit's breakout board.Edit: Updated schematic.

author: ebclr
author_rank: Super Contributor
timestamp: June 16, 2016, 06:57:29 am
content: http://www.aliexpress.com/item/Free-Shipping-0-95-inch-7pin-Full-Color-65K-Color-ssd1331-OLED-Display-3-3v-5v/32646204260.html?spm=2114.01010208.3.11.FvzuR6&ws_ab_test=searchweb201556_8,searchweb201602_4_10037_10017_507_10033_10032_401_10040,searchweb201603_3&btsid=90fc2269-b752-4d8a-bb17-0a62c483cddc
New here - Page 1
Forum section: electronics / general

author: System Error Message
author_rank: Frequent Contributor
timestamp: June 15, 2016, 04:03:13 am
content: Hi i'm new here, i've watched many EEVblog videos and am looking to go into electronics aside from computing which i'm already doing. For all computing related question you can always ask me as long as its not a what brand or model should i get.
Bit of an odd request, but I'm in need of some 8 conductor silicone wire. - Page 1
Forum section: electronics / general

author: XOIIO
author_rank: Super Contributor
timestamp: June 14, 2016, 02:08:15 am
content: Hey all, so in this video you an see me repair an issue that I have with my razer megalodon headset.Now, self promotion aside, one of the issues I have with this is the "tangle free" cloth wire, which has gotten fairly tattered, and kinks up a fair bit as I toss the headset around when not in use.Then I thought of a solution, why not instead of this cloth covered or plastic wire, what about silicon? I can easy get a silicone usb cable off ebay to replace the usb side, but the headphone cable has 8 conductors, made out of magnet wire (or at least the stuff similar, each one is multi stranded).Anyhow I don't know if such wire exists, but if so it would be fantastic to replace it, either in black or some sort of color, electric blue would look nifty.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: June 14, 2016, 06:31:46 am
content: Silicon is a brittle, glassy, semiconducting element.Surely you mean silicone, referring to the insulation?Tim

author: XOIIO
author_rank: Super Contributor
timestamp: June 14, 2016, 06:37:19 am
content: Quote from: T3sl4co1l on June 14, 2016, 06:31:46 amwell, yes, obviously.

author: Brumby
author_rank: Unknown
timestamp: June 14, 2016, 07:08:21 am
content: Obvious, yes, but this is still a forum frequented by engineers and like-thinking minds........

author: Kjelt
author_rank: Super Contributor
timestamp: June 14, 2016, 09:04:31 am
content: I only encountered single thin silicon multistranded wire (0,25mm) which was great to work with on prototyping since they can withstand soldering temperature and you can strip them perfectly with your fingernails.Unfortunately they went per 100 meter spools costing over a $1/meter , if you want multiple colours that is a bit expensive.

author: ajb
author_rank: Super Contributor
timestamp: June 14, 2016, 11:31:55 am
content: USB3 cable? A-B should have 8 wires, or C-C should have 5 twisted pairs plus power.

author: Kjelt
author_rank: Super Contributor
timestamp: June 14, 2016, 11:32:41 am
content: don't think plain USB cable has expensive silicon cable inside, never saw any $3 computer cable have silicon wire in it for that matter.

author: nogood
author_rank: Contributor
timestamp: June 14, 2016, 03:31:32 pm
content: Found this:http://www.tme.eu/gb/details/cf240.pur.02.08/multicore-cables-shielded/igus/Polyurethane not Silicone, but you have to take 5 meters at once, at that price.If there are good quality patch cables, you could mod your headset to use Cat5 cables, maybe even with the connectors.I thought about doing something similar, when I had to repair my headset.There are cheaper Silicone or PVC type cables, but you have to take into account the thickness, you probably dont want a >1cm thick cable dangling from your headphones.Something like:http://www.tme.eu/de/details/s_ftp6-cu-030bk/rj45-kabel/goobay/68698/might also work, LSZH isolation (I don't know what exactly, but it's not PVC, maybe PUR ?)
iris fu private msg - Page 1
Forum section: electronics / general

author: sarepairman2
author_rank: Frequent Contributor
timestamp: June 16, 2016, 09:10:28 am
content: has anyone else gotten a message form this guy trying to hustle chinese pcb services?

author: madires
author_rank: Super Contributor
timestamp: June 16, 2016, 10:00:40 am
content: I've got one of those Dot messages too and asked if it's a simple NFC tag. No response. Maybe the account is already closedWould those people please stop thinking that they've got the best idea of the last 10 years and just need to bother others with SPAM to become rich. It's disgusting!

author: Wilksey
author_rank: Super Contributor
timestamp: June 16, 2016, 04:56:53 pm
content: Yup, got a PM from iris fu about a cheap PCB service.I just deleted it.
Premier Farnell bought by Daetwyler - Page 1
Forum section: electronics / general

author: 3db
author_rank: Frequent Contributor
timestamp: June 14, 2016, 11:52:48 am
content: Daetwyler Holdings have bought Farnell.I wonder if this will be good or bad for us.Lets have a rant

author: tom66
author_rank: Super Contributor
timestamp: June 14, 2016, 11:56:19 am
content: I'm surprised they were that cheap (only £700m) pretty cheap for the (~largest) electronics distributor in Europe?Also the BBC is running it as "Raspberry Pi maker" bought by Daetwyler.

author: 3db
author_rank: Frequent Contributor
timestamp: June 14, 2016, 12:02:21 pm
content: Seems I was a bit late in creating this thread.I tried to delete it but cannot.Perhaps a moderator could kill it off.
Am I reading this right and education is not that bad after all. - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: June 12, 2016, 10:48:10 am
content: As some know I am trawling through a HNC in electronic engineering. This is turning into more of a general engineering course with an electrical bias which is yet to come. At the moment I am studying static mechanical systems and I am completing the assignment on beams and columns.I'm doing an assignment question on columns I am given the Young's modulus which I believe is how strong the material actually is and the yield stress or stress being applied to it. I'm given the diameter of the column and I need to calculate the length. The column is actually a tube so I have 2 diameters but that is fine I have the relevant formulas for a tube.So the 1st part of the question (a) asked me to calculate the length of the column at which buckling would start to occur versus compression of the column. But I'm a bit baffled when I come to the next section of the question. Part (B) asks me that if the column is of the length I have determined in (a) what will the failure mode be and at what load do I expect it to occur. Is this really how simplistic our education has become? Or am I misunderstanding something. I've just been asked to calculate the length at which buckling will occur rather than compression therefore obviously the failure mode will be buckling would it not? And having being asked to calculate the length of the column at which point with the given load the buckling will start to occur presumably the answer to question be is a load I was told to use in question a. Have I missed something here or is this really along the lines of you will pass the engineering bit if you can read English and write English?

author: Simon
author_rank: Unknown
timestamp: June 12, 2016, 11:21:50 am
content: ah I think I have it I think the yield stress I have been given may or may not cause buckling so that is a separate calculation although the answer to the 1st part question be is in fact what I was told question a.

author: Simon
author_rank: Unknown
timestamp: June 12, 2016, 11:43:01 am
content: no still confused, maybe the course material has some bits missing.
Are your scope probes safe?    - Page 1
Forum section: electronics / general

author: joeqsmith
author_rank: Super Contributor
timestamp: June 11, 2016, 08:21:26 pm
content: Do your scope probes (or for that matter your multi meter probes) come with a warning label?I wonder how long until there are strict mandates against enforcing the tips radius. Should I buy stock now in the new Fisher Price test equipment division?Quote

author: uncle_bob
author_rank: Unknown
timestamp: June 11, 2016, 08:27:39 pm
content: Hi.... you mean yours did not come with the "do not eat the probes" warning label?Bob

author: DimitriP
author_rank: Super Contributor
timestamp: June 11, 2016, 08:30:43 pm
content: Quote from: uncle_bob on June 11, 2016, 08:27:39 pm"For external use only"

author: tautech
author_rank: Super Contributor
timestamp: June 11, 2016, 08:33:06 pm
content: Quote from: DimitriP on June 11, 2016, 08:30:43 pm

author: wkb
author_rank: Super Contributor
timestamp: June 11, 2016, 09:34:12 pm
content: Quote from: DimitriP on June 11, 2016, 08:30:43 pm"Power down before inserting" ?

author: Halcyon
author_rank: Unknown
timestamp: June 12, 2016, 03:18:12 am
content: This reminds me of those "Health Warning" tags that come attached to keyboards and mice with giant "Do not remove this label" notices.These things are the first to get ripped off before I use the damn things.I firmly believe in the concept of natural selection. Do away with needless warnings. If you're stupid enough to drink drain cleaner, then let nature take its course.

author: vk6zgo
author_rank: Super Contributor
timestamp: June 12, 2016, 03:27:57 am
content: I've always loved the Silica Gel bags with "Do Not Eat" printed on them."Oh bummer,I thought the manufacturer had thoughtfully provided a nice snack!"
A good deal? - Page 1
Forum section: electronics / general

author: interoth
author_rank: Contributor
timestamp: June 11, 2016, 01:44:00 pm
content: Today I received these in the post19 Macbook laptop batteries delivered for £45. Spares bought from a guy building an ebike.Each of the packs is quoted on the shell as 55Wh. Each have 6 606168 9.4Wh 3.7V lipo batteries. So total 114 cells.Is this a good deal? I've been told there is around an 88% success rate in terms of dead cells. From the few I've tested they look good.Now starts the slow process of opening and testing...

author: uncle_bob
author_rank: Unknown
timestamp: June 11, 2016, 05:04:44 pm
content: HiSuces rate on cells that will take > 70% rated charge should be somewhere between 10% and 80%. It all depends on where they really came from and how much sorting was done before you got them. Seems a bit expensive for cells that likely have < 30% of their cycle life left. Mac's stopped using replaceable batteries a long time ago (battery life wise).Bob

author: kripton2035
author_rank: Super Contributor
timestamp: June 11, 2016, 07:18:57 pm
content: the cells in macbook batteries are not 18650 like in other laptops ...they are completely specific ... not sure it is a good deal then ?
Orange Pi one SMplayer 1080p video - Page 1
Forum section: electronics / general

author: lilos
author_rank: Contributor
timestamp: June 05, 2016, 10:24:55 pm
content: Orange Pi one SMplayer 1080p video Ubuntu Mate 16.04 Hardware decoder!http://www.iot-dev.net/full.php?ar=33

author: German_EE
author_rank: Super Contributor
timestamp: June 06, 2016, 05:35:42 pm
content: That you can play 1080p from such a small board is quite remarkable, did you use VLC or the Totem player that comes with Ubuntu?Also, does the HDMI connection carry the sound signal as well?

author: lilos
author_rank: Contributor
timestamp: June 07, 2016, 11:47:41 am
content: We are working to make Ubuntu 16.04 fully functional image with CedarX(Allwinner's proprietary multimedia library for hardware accelerated video) integrated to VLC.Also we are adding all arm-Mali user space libs for OpenGL.VLC maybe is only player that can use CedarX library.

author: lilos
author_rank: Contributor
timestamp: June 08, 2016, 11:04:06 pm
content: Image for Orange Pi one is almost ready VLC can play 1080p H264, we added cedarx lib in vdpau and VLC and SMplayer works.It seems VLC is more good with vdpau.I tested with HEVC x.265 – Tears Of Steel 1080P @ 400kbps fromhttps://x265.com/hevc-video-files/and also was ok. 4k did`t work for now.@German_EE HDMI audio is perfect not problem! Also we tested with external usb hub with usb sound card and both works!720p vlc1080p vlc

author: bingo600
author_rank: Super Contributor
timestamp: June 11, 2016, 12:36:30 pm
content: I've been doing ,full HD relaying on my raspi for years.Nice if for the bedroom TV.I know the orange is cheaper , but Kodi on a raspi (w. Mpeg2 licence) just works./bingo
Orange Pi one meet X-mini - Page 1
Forum section: electronics / general

author: lilos
author_rank: Contributor
timestamp: June 09, 2016, 10:51:38 pm
content: http://www.iot-dev.net/full.php?ar=38

author: Melt-O-Tronic
author_rank: Frequent Contributor
timestamp: June 10, 2016, 12:05:54 am
content: Why did that guy take the other guy's magic contact lenses away? Is he the repo man?

author: lilos
author_rank: Contributor
timestamp: June 11, 2016, 12:35:50 pm
content: Quote from: Melt-O-Tronic on June 10, 2016, 12:05:54 amMovie is Gods of Egypt and is fantastic!I watched all movie on Orange pi one in VLC.
Nice article on Jim Williams - Page 1
Forum section: electronics / general

author: mtdoc
author_rank: Super Contributor
timestamp: June 10, 2016, 11:29:55 pm
content: Remembering Jim Williams, 5 years laterGood stories and some great pictures. It seems like he was a really great guy. I have a patient who is retired LT EE and a friend and colleague of Jim Williams. I was impressed that when he told me he retired after many years at LT and I said "Jim Williams", the first words out of his mouth were " I really miss Jim". That is quite a testament to the man.

author: sarepairman2
author_rank: Frequent Contributor
timestamp: June 10, 2016, 11:57:54 pm
content: I have only been in this hobby/profession for several years and I am pretty familiar with alot of his app notes and have several as of yet uncompleted due to budget and time issues test-boxes based on his designs. I am very excited to finish these projects... its great that he published all the stuff.I feel that eventually I will find uses for and build ALL of his circuits
Jim Williams Article - Page 1
Forum section: electronics / general

author: ECEdesign
author_rank: Regular Contributor
timestamp: June 11, 2016, 12:14:29 am
content: Good article on Jim Williams. Definitely a good role model!http://www.edn.com/design/analog/4442194/Remembering-Jim-Williams--5-years-laterEDIT: oops guess this was already posted but I can't delete it...

author: AF6LJ
author_rank: Unknown
timestamp: June 11, 2016, 12:33:23 am
content: I loved reading his articles when I had access to EDN.Thanks for sharing that, I am going to pass it on...
Solenoid Connector Identification - Page 1
Forum section: electronics / general

author: sca
author_rank: Regular Contributor
timestamp: June 10, 2016, 12:05:16 pm
content: Another 'What is it?', I'm afraid.Can anybody out there hazard a guess at the manufacturer of this connector.It's 2W, 0.1" (or may be 2.5mm) pitch, locking housing with crimp inserts.It's used on SMC and Numatics solenoids, and possibly others. There's an outside chance that they are made in house by the solenoid people, but I think there's a good chance that it's not. The housing moulding does have a + and - moulded in, which may point to something custom though. The solenoid people sell them, but at daft prices, and of course they don't tell you the manufacturer.The usual google images search hasn't turned up anything, and I can't spot it amongst JST's offering. Haven't started ploughing through Molex / Amp / Tyco yet.There are no manufacturer IDs on the moulding.Any thoughts?Thanks,sca

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 10, 2016, 12:35:48 pm
content: Maybe it is my imagination but it looks like there is some text left and right of the clip in the 2ndpicture.

author: sca
author_rank: Regular Contributor
timestamp: June 10, 2016, 12:42:00 pm
content: Quote from: PA0PBZ on June 10, 2016, 12:35:48 pmYou're correct, it does look like writing, I thougt so myself when I looked at the picture, but unfortunately a check under the microscope confirms it's just moulding imperfectionssca
Datasheet Applications - Specifically LM317 - Page 1
Forum section: electronics / general

author: Aodhan145
author_rank: Frequent Contributor
timestamp: June 08, 2016, 09:02:34 pm
content: Just opened the datasheet of a LM317 again. Something that I have never paid any attentions to is the applications. Who makes them up? Do they just pull them from their ass?

author: ataradov
author_rank: Super Contributor
timestamp: June 08, 2016, 10:17:21 pm
content: I had to do similar thing for a software stack. Your assumption is correct - enable your imagination and write down every possible application you can imagine.

author: Aodhan145
author_rank: Frequent Contributor
timestamp: June 08, 2016, 10:20:20 pm
content: Quote from: ataradov on June 08, 2016, 10:17:21 pmWhat purpose do they serve though? I completely get applications for some other components but the most basic voltage regulator.

author: ataradov
author_rank: Super Contributor
timestamp: June 08, 2016, 10:21:53 pm
content: I have no idea, I've got a corporate template with predefined structure and fields, so I had to put something in there.Ask marketing people, who created that template. I guess they do it so they life does not seem so empty and pointless.

author: shawnb
author_rank: Contributor
timestamp: June 09, 2016, 07:37:37 pm
content: You can thank the marketing department... TI publishes "solutions guides" for specific product and application fields, and most of these look like they correspond to a specific solution guide that lists the LM317.For a basic component it looks pretty silly on a datasheet, but I guess for more specialized parts it might make sense.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: June 10, 2016, 02:44:59 am
content: They forgot 3D printing and bitcoin mining.
Fluke Caught with your pants down! - Page 1
Forum section: electronics / general

author: snipersquad100
author_rank: Frequent Contributor
timestamp: June 09, 2016, 09:55:44 pm
content: https://youtu.be/FUmbsBYVTQ0

author: RGB255_0_0
author_rank: Frequent Contributor
timestamp: June 09, 2016, 10:09:16 pm
content: This is why I wanted Dave to do a review of this. It's a China-only model but it's cheap and looks way over engineered for its price.

author: snipersquad100
author_rank: Frequent Contributor
timestamp: June 09, 2016, 10:13:49 pm
content: I got the chinese fluke 15B+ for £65, im going to have to take it apart now lol.I could do with a temp function.

author: retiredcaps
author_rank: Super Contributor
timestamp: June 09, 2016, 11:59:07 pm
content: Thread already started athttps://www.eevblog.com/forum/testgear/fluke-12e-'easter-eggs'/
Sony Sells Vegas To Magix - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 09, 2016, 04:59:40 am
content: I know quite a few people use Vegas here (me included):http://www.sonycreativesoftware.com/news/pressreleases/2016/sony-creative-software-sell-products-to-magix

author: imidis
author_rank: Frequent Contributor
timestamp: June 09, 2016, 05:39:50 am
content: Sony has sold off a bit. I don't use Vegas, but they have been dumping off a lot of their stuff, mainly pc side games/software