hybridfree/eevblog-posts huggingface dataset:
Agilent BenchVue -> Excel: Changing time format - Page 1
Forum section: electronics / general

author: TimNJ
author_rank: Super Contributor
timestamp: November 18, 2014, 09:45:23 pm
content: Hi all,I'm not exactly sure if this is the right place to ask, but perhaps someone might have an idea, maybe if you have a good deal of experience in Excel.So I had BenchVue do some datalogging via a 34401A bench multimeter. I was able to easily export the data to Excel, but now I want to be able to graph it so that that the timescsale is in seconds (or maybe milliseconds). Problem is: It's formatted in as year-day-month, hour-minute-seconds. I've been going through the time formatting options on Excel and I can't seem to get it in seconds alone. Any ideas? Am I overlooking something?Thank you.

author: Unknown
author_rank: Unknown
timestamp: November 18, 2014, 10:09:53 pm
content: I assume that format of Column 'E' is "text". You will need to split the contents of the cell into two distinct columns before you can really start working with it. It seems a bit silly that BenchVue doesn't do this for you.Assuming that the data mask doesn't change (i.e.: Values are always yyyy-mm-dd hh:mm:ss.xxx) you can use the following formula in a new column to extract the date from your original data and display it in the correct order:=DATE(LEFT(E2,4),MID(E2,6,2),MID(E2,9,2))As for the time, use this formula in another column:=RIGHT(E2,12)or=MID(E2,12,8)if you just want hh:mm:ssIt will mean though you have two sets of date/time, but you can always hide column E if you don't want to see it.

author: apelly
author_rank: Unknown
timestamp: November 19, 2014, 12:19:10 am
content: Excel times are stored as (days since some year).(seconds since midnight)You can see this if you format a date as a number. For a time you just want the bit after the decimal. Once you know this it becomes much easier to work with time data.Good luck.

author: TimNJ
author_rank: Super Contributor
timestamp: November 19, 2014, 08:21:14 pm
content: Thank you all! I was going to ask more questions but I figured it out. For anyone else, basically you can convert the date into a long number like 41949.6813119213, for example. The non fractional part is the date . The decimal part is the time expressed as a fraction of a 24 hour day. (thanks apelly) So if you multiply that by the amount of seconds in a day (86400), you get the seconds (and milliseconds) value for each sample. If you then subtract off the entire first sample value, each sample will be the difference in time since the start, with initial t=0. Make sure you format all cells as numbers and give yourself ample decimal places. I was up to 15 on some.Thanks for your help everyone.

author: Zero999
author_rank: Super Contributor
timestamp: November 22, 2014, 05:33:07 pm
content: How about copying it to a text editor, saving it and importing it as text? I don't know about Excel but OpenOffice's spreadsheet enables you to convert space separated text into two separate columns.
Anyone going to Lux Live this year? - Page 1
Forum section: electronics / general

author: 8086
author_rank: Super Contributor
timestamp: November 18, 2014, 10:18:26 am
content: http://www.luxlive.co.uk/

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 18, 2014, 10:56:47 am
content: I'll be there Wed AM.There will be a couple of my "toys " on display - Printed Systems and Plessey

author: 8086
author_rank: Super Contributor
timestamp: November 18, 2014, 01:04:13 pm
content: Oh great Mike, might see you there. I'll be there all day Wednesday.

author: 8086
author_rank: Super Contributor
timestamp: November 19, 2014, 07:29:47 pm
content: Well, I saw Mike's creation on Plessey's stand - looked pretty damn good to me.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 20, 2014, 12:10:14 am
content: Pity they didn't have time to put the camera in a box...They asked how big a display I could make.I replied "How much money do you have...?" Still waiting for an answer but I did mention I know a place that can assemble 1.6m long PCBs
A SUPRISE FOR DAVE - Page 1
Forum section: electronics / general

author: BTO
author_rank: Frequent Contributor
timestamp: November 19, 2014, 04:43:25 pm
content: Hey Davethis is not technically relatedi just thought you would appreciate this (being a Back to the Future Fan)i thought it was coolperhaps the rest of the forum might also like itEnjoyPS, with that Line of DeLoreans i was thinking to myselfthey should donate one to you and you could pull it apart LOL, imagine that huh
Electronics related Comedy on YouTube - Page 1
Forum section: electronics / general

author: eV1Te
author_rank: Regular Contributor
timestamp: November 18, 2014, 11:58:14 pm
content: I found this short clip from the excellent show IT CrowdQuoteAnyone else have any entertaining videos they like to share? Doesn't matter if we have seen them before, there is always someone that have missed them.

author: cimmo
author_rank: Frequent Contributor
timestamp: November 19, 2014, 06:19:44 am
content: I found this "analysis" of the Lunar Module electrical power system quite amusing:

author: TheBay
author_rank: Unknown
timestamp: November 19, 2014, 11:51:20 am
content: This always makes me laugh
video shows tony hawk riding hendo the real life hoverboard - Page 1
Forum section: electronics / general

author: RobertoLG
author_rank: Frequent Contributor
timestamp: November 18, 2014, 10:01:48 pm
content: here:http://www.techeblog.com/index.php/tech-gadget/video-shows-tony-hawk-riding-hendo-the-real-life-hoverboard
Polyphonic Singing - A Follow-Up - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: November 18, 2014, 07:10:15 pm
content: Board members may remember a post some time ago that included a remarkable You Tube video, the lady concerned was able to sing two notes at the same time. Somebody has done an analysis of this and the new video has been posted on You Tube:The link is work safe.

author: SirNick
author_rank: Frequent Contributor
timestamp: November 18, 2014, 08:05:14 pm
content: Woah, cool!

author: jancumps
author_rank: Unknown
timestamp: November 18, 2014, 08:50:45 pm
content: AAah, amazing. I tried it while viewing the video. Failed.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 19, 2014, 01:14:15 am
content: Very nice, exactly what I was hoping for from the first!

author: GK
author_rank: Super Contributor
timestamp: November 19, 2014, 07:50:01 am
content: I can still only see cleavage.

author: babysitter
author_rank: Frequent Contributor
timestamp: November 19, 2014, 08:07:27 am
content: Thatcurves!When the self-adjusting, self-learning, preprogrammable PID controller for her first oscillator responds to change of the second oscillator or vice versa. Besides looking good, thought food for control and DSP freaks.

author: TheBay
author_rank: Unknown
timestamp: November 19, 2014, 11:07:51 am
content: Quote from: GK on November 19, 2014, 07:50:01 am
force to be a newbie - Page 1
Forum section: electronics / general

author: joedz
author_rank: Newbie
timestamp: November 01, 2014, 12:10:32 am
content: someone or somehow removed my forum user name and password! force to be newbie again. i was with the eevblog forum for years so whyyyyyyyyyyy did this happen?

author: miguelvp
author_rank: Super Contributor
timestamp: November 01, 2014, 02:56:46 am
content: what was your forum user name, same as you are using now?

author: EEVblog
author_rank: Unknown
timestamp: November 01, 2014, 08:43:26 am
content: Did you have any posts?If you did then that shouldn't have happened.

author: Unknown
author_rank: Unknown
timestamp: November 02, 2014, 07:55:46 am
content: I call bullshit... there, I said it!

author: joedz
author_rank: Newbie
timestamp: November 17, 2014, 11:34:46 pm
content: Thanks for all the feed back everyone! <strong>But its true! I was even a on with Dave from the eevblog on a live show back in the day of them great shows.
Pukka???  Or not????? - Page 1
Forum section: electronics / general

author: G4ZWI
author_rank: Newbie
timestamp: November 17, 2014, 08:23:19 pm
content: Some of these items really seem too good to be true!!!Fishy, or not??http://tankesus.dk/discountsalepage114e33ghu335575.php?id=agilent-technologies-34461a-digital-multimeter-automanual-612-p-13933.htmlThanks for input, Fred

author: rob77
author_rank: Super Contributor
timestamp: November 17, 2014, 08:43:42 pm
content: that must be either a mistake or scam.... 6,5 digit agilent 34461A for $300 simply can't be a real deal.even the cheapest 6,5 digit DMM - the Picotest M3511A on sale is more expensive than $300 - it's on sale here in a local shop here for approx 400Euro (was approx 500Eur before).

author: wraper
author_rank: Unknown
timestamp: November 17, 2014, 08:43:42 pm
content: Don't think that this is true. If you check bare domainhttp://tankesus.dkthis is some freaking blog. Contact information is just some email, no phone, no address. I'm not sure even if this is serious, they might just test website which is in making process. How did you find it?

author: tom66
author_rank: Super Contributor
timestamp: November 17, 2014, 09:15:31 pm
content: This is a scam site that's been created on a genuine domain, probably to defraud

author: tszaboo
author_rank: Super Contributor
timestamp: November 17, 2014, 09:50:34 pm
content: Can you take seriously this:"Q:.What payment methods do you support?A:Western union,credit cards(Your Information will be safe and no any Credit Cards information leave on our website If your payment is failed,please get back to our site and login to our site to update your billing information,or select another payment method as gspay, so we can still process your order."

author: jancumps
author_rank: Unknown
timestamp: November 17, 2014, 09:55:41 pm
content: I've mailed the blog owner. She can pick it up with her host.
Video: Beyond Transistor Scaling - New Devices for Low-Energy Information Proc. - Page 1
Forum section: electronics / general

author: CJWarlock
author_rank: Contributor
timestamp: November 18, 2014, 03:29:17 pm
content: I've found a pretty interesting video presentation on YouTube:Beyond Transistor Scaling: New Devices for Ultra-low-energy Information Processing- the topic introduces it well. Everybody who's interested in transistor scaling challenges and what other solutions are there would be satisfied to watch it. Below is the description of the video.Quote
iPad Air - slower charging vs batt life - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: November 17, 2014, 06:45:37 am
content: iPad air charger is 12 watts and 4S phone charger is 5 watts. Both have USB connector so they would both be 5 volts output, but 2.5 amps vs 1 amp respectively. The phone charger should charge the ipad just fine, only slower. I am wondering if this slower charge would benefit the batteries and perhaps extend their life because they would probably produce less heat when charging, among other things.Any thoughts?

author: Jeroen3
author_rank: Super Contributor
timestamp: November 17, 2014, 06:58:05 am
content: The charge rate in % of battery capacity doesn't differ that much.Also, both devices use some smarts in charging. Fast charge up to 60-70%, then it goes to slow charging.

author: encryptededdy
author_rank: Frequent Contributor
timestamp: November 17, 2014, 07:11:18 am
content: I recently bought a Galaxy Note 4 which has a similar "Fast Charging" mode which charges at 9V 1.67A (15W) compared to the normal USB 5W. Samsung advertises a 50% charge in 30mins. There's been a lot of discussion on Note 4 forums as to whether it is beneficial to just turn off the fast charging mode when it is not needed, in order to prolong battery lifetime.Personally I don't think that this can make a huge difference to battery lifetime, however I wonder if there is a mathematical way of calculating how much more the battery degrades at the faster charge rate.

author: Jeroen3
author_rank: Super Contributor
timestamp: November 17, 2014, 08:30:04 am
content: I think irregular or intermittent charge cycles, such as 10% in the car, few % in the office until you get a call, or other intermittent charge cycles, are the worst you can treat any battery. Although lithium batteries are less sensitive to this.But this might also be because of measurement inaccuracies. Since the % isn't calculated on voltage, it is calculated on the energy that goes in and out of the battery. And you can only know the battery is full, and thus calibrate, when it doesn't take any more current at the charge voltage.Draining it empty is dangerous.
ADDS BY SALUS - Page 1
Forum section: electronics / general

author: MrsR
author_rank: Regular Contributor
timestamp: November 15, 2014, 08:01:40 pm
content: HEY!!! DAVE!Every time I log onto EEVBLOG I get clobbered by Adds by SALUS and have to clean my computer each time.Could you check your server for a Viris mate.Rachael

author: wraper
author_rank: Unknown
timestamp: November 15, 2014, 08:22:39 pm
content: Don't know if eevblog is infected or not, didn't notice anything suspicious. But for sure your computer has security breach if some crap can install untended to your computer whatsoever site you are visiting. It might be that just some ad content is infected while website by itself is completely clean.

author: wraper
author_rank: Unknown
timestamp: November 15, 2014, 08:30:30 pm
content: Did a bit of google search, and seems that Salus adware is installed together with free programs. Therefore it is very unlikely that you get it on eevblog.

author: MrsR
author_rank: Regular Contributor
timestamp: November 15, 2014, 08:32:08 pm
content: We have a good anti virus program and it is only happening when connecting with EEVBLOG. I am not a computer expert and will get my son to have a look at my computer when he comes home next week. This started last Thursday.It's really frustrating.Rachael

author: wraper
author_rank: Unknown
timestamp: November 15, 2014, 08:45:33 pm
content: Then your antivirus is indeed crap if it pass this junk on the computer. What I can recommend is first of all update your browser, flash player and java if is it is installed. Actually a single virus I got in about 8 years was because of hole in java.http://krebsonsecurity.com/2013/10/java-update-plugs-51-security-holes/

author: rdl
author_rank: Super Contributor
timestamp: November 15, 2014, 08:56:26 pm
content: Java should be disabled in your browser. This is usually the default setting. Don't enable it unless you're certain you really need it. It's a security risk.Note that JavaScript and Java are two different things.
PP3 9v battery mAh - Page 1
Forum section: electronics / general

author: Flump
author_rank: Frequent Contributor
timestamp: November 15, 2014, 05:00:05 am
content: How long would your average non rechargeable pp3 9v battery lastwith a 7.2mAh drain ?

author: Unknown
author_rank: Unknown
timestamp: November 15, 2014, 06:29:22 am
content: About 76 hours assuming a 550mAh Alkaline cell (that's being generous though). It'll also depend on the operating voltage range of the product.

author: kolbep
author_rank: Frequent Contributor
timestamp: November 15, 2014, 06:46:30 am
content: Found out the other day that you can even download datasheets for duracell batteries. Just google 'em.then from the graphs you should be able to figure out the amount of time to your threshold voltage depending on your load...

author: Psi
author_rank: Super Contributor
timestamp: November 15, 2014, 08:55:46 am
content: Yeah, 550mAh is probably a bit optimistic.Assume a generic no name brand 9V is maybe 400mAh.And assuming you're not going to get all of that 400mAh (unless you're discharge rate is really really low, like below 1mA)So a more real world figure might be ~300-350mAh for ~7mA discharge.So, for a 7.2mA discharge my guess is a reliable 40-50 hours of runtime.

author: Flump
author_rank: Frequent Contributor
timestamp: November 15, 2014, 10:02:27 am
content: thanks very much guysi did google it but it was early morningand i couldn't find what i wanteddoes this sound right ?a generic pp3 with a 1k resistor and 3mm red led across itdrops from 8.77v to 8.67v after 5 mins ?

author: kolbep
author_rank: Frequent Contributor
timestamp: November 15, 2014, 01:00:02 pm
content: http://ww2.duracell.com/media/en-US/pdf/gtcl/Product_Data_Sheet/NA_DATASHEETS/MN1604_6LR61_US_CT.pdfUsing the graphs, and taking your cutoff voltage at about 7.5v, and 7.2mAh gives just over 55 hours

author: lapm
author_rank: Frequent Contributor
timestamp: November 15, 2014, 05:51:11 pm
content: I hear reference to 400 mAh from somewhere. But of course as on all batteries this depends heavily on temperature, load current and exact manufacturing technology of battery.Should actually run some battery tests at some point for alkaline batteries... have been wondering those +30% adverts on battery packs at market... +30% of what exactly?
"I Only Give Negative Feedback" Wallpapers - Page 1
Forum section: electronics / general

author: Pack34
author_rank: Frequent Contributor
timestamp: November 01, 2014, 12:59:43 am
content: I really liked Dave's T-Shirts, so I made these wallpapers a while ago. I put my own spin on them and thought I would share.Enjoy

author: makerimages
author_rank: Regular Contributor
timestamp: November 15, 2014, 02:15:39 pm
content: Nobody, repeat Nobody - has a computer that small. Make them properly sized, or don't make them at all.

author: Pack34
author_rank: Frequent Contributor
timestamp: November 15, 2014, 03:49:58 pm
content: Quote from: makerimages on November 15, 2014, 02:15:39 pmSet wallpaper to center and adjust the background color to suit. It makes it useable over a wide range of resolutions without causing weird stretching. I have my display settings synced between my tablet, desktop, and work computer. It keeps everything simple and consistent.

author: Unknown
author_rank: Unknown
timestamp: November 15, 2014, 04:21:33 pm
content: Thanks! They look great.
OT Humor "New MacBook Wheel" - Page 1
Forum section: electronics / general

author: Falcon69
author_rank: Super Contributor
timestamp: November 15, 2014, 04:25:13 am
content: hmmmMove wheel around till hit hits letter t, press button, then move wheel again to scroll to the right where T is in the SUB-T category, then press button again.Wouldn't it just be easier to use a keyboard that has a T key on it? That's like only ONE button to push.Ya, I see this taking off like the square wheel did back in the stone age.
Visual Studio Community 2013 A Full-Featured IDE - FREE - Page 1
Forum section: electronics / general

author: miguelvp
author_rank: Super Contributor
timestamp: November 15, 2014, 06:50:35 am
content: This didn't belong in the microcontroller FPGA forum so this is the only place I think it fits.http://www.visualstudio.com/en-us/products/visual-studio-community-vsNote: don't try to open with old versions of windows internet explorer because it won't work right, it works fine with explorer 11 thoughAnyway, free as in free to use for free or paid apps.non-enterprise organizations, up to 5 users.enterprise organizations (meaning those with >250 PCs or > $1MM in annual revenue), no use is permitted beyond the open source, academic research, and classroom learning environment scenarios.Windows, Android & iOS.C++, Python, HTML5, JavaScript, C#, VB, and F#.Designers, editors, debuggers, profilers.Web tooling for ASP.NET, Node.js, and JavaScript.Visual Studio Community 2013 includes all the great functionality of Visual Studio Professional 2013, designed and optimized for individual developers, students, open source contributors, and small teams.Requires Windows Server 2008 or up, Windows 7 (SP1) or upYup you can develop windows phone apps too, not sure about Arm x86 or 64 bit Android Lollipop.
Some feedback on my YT channel wanted! - Page 1
Forum section: electronics / general

author: fubar.gr
author_rank: Unknown
timestamp: November 14, 2014, 02:46:12 pm
content: I have an electronics (mostly) related Youtube channel:https://www.youtube.com/user/FubarGRblog/videosThe videos are in my native language, Greek. I want to expand my audience, but at the same time I don't want to alienate my Greek audience.This is my latest video where I have added English captions.The video is about how to connect a remote control module for turning on a PC. In the comments there's an accompanying page in my website where I give more details about the materials I used and the construction, but I didn't have time to translate it yet.What do you think about the captions? Do they work well? What about the video in general?The other option is to speak in English in my videos, but I think my spoken english is bad. Here's an example:So what do you think is better, captions or speaking in English?

author: Thor-Arne
author_rank: Unknown
timestamp: November 14, 2014, 03:01:15 pm
content: I vote for English, this gives a wider audience.Your spoken English isn't that bad, it's fully understandable.
Weather display software for Raspberry Pi - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: November 14, 2014, 02:24:05 am
content: I'm after some software which will essentially turn my Pi into a "weather station". However rather than grabbing data from actual sensors (which I do not have), I'd like it to download data such as current observations, radar, and warnings from Australia's Bureau of Meteorology.Does anyone know of such a program?

author: RobertoLG
author_rank: Frequent Contributor
timestamp: November 14, 2014, 05:43:43 am
content: I found this one, says it works fine with the pi, take a look to see if that's what you wanthttp://sourceforge.net/projects/weewx/
Breaking: ESA Probe Lands on Comet - Page 1
Forum section: electronics / general

author: German_EE
author_rank: Super Contributor
timestamp: November 12, 2014, 04:26:41 pm
content: Confirmation arrived at 16:03 UTC that the probe had landed and was sending signals back. There will be a lot of happy scientists and engineers in Darmstadt tonight

author: TheBay
author_rank: Unknown
timestamp: November 12, 2014, 04:35:53 pm
content: Just heard, incredible!Can't wait to see images coming back from it.

author: Kjelt
author_rank: Super Contributor
timestamp: November 12, 2014, 05:56:00 pm
content: https://www.eevblog.com/forum/chat/ot-rosetta-arrives-at-comet/msg548640/#msg548640
Anynoe else want to burn down Chanel HQ? - Page 1
Forum section: electronics / general

author: Lightages
author_rank: Unknown
timestamp: November 12, 2014, 05:35:46 am
content: Over the past few days every video I see on youtube with a starting ad has this absolutely annoying Chanel ad. Is this just me or should we all storm Chanel HQ with torches? It is ridiculous.

author: CJWarlock
author_rank: Contributor
timestamp: November 12, 2014, 06:06:40 am
content: Dunno what you're talking about as I see no ads at all. AdBlock Plus + FlashBlock and voila, control over embeded flash objects (including ads) is in the user's hands. That's assuming you're using a browser that supports such addons.

author: marshallh
author_rank: Unknown
timestamp: November 12, 2014, 06:58:12 am
content: What ads?Haven't seen an ad on the entire internet for years. Get adblock

author: Lightages
author_rank: Unknown
timestamp: November 12, 2014, 09:51:43 pm
content: OK, installed adblock pus, flashblock, and did a flash cookie clean. I try to not block ads for site like Dave's here as it helps pay his bills. I guess I would much rather not pay google's bills and not support Chanel.Thanks for making get off my lazy virtual butt and do some cleanup.

author: johansen
author_rank: Super Contributor
timestamp: November 13, 2014, 07:24:59 am
content: you can also download a half megabyte long hosts file and it will take care of anything adblock can't reach.

author: Circlotron
author_rank: Super Contributor
timestamp: November 13, 2014, 11:23:38 am
content: ^^ I use this hosts file on my Linux boxhttp://someonewhocares.org/hosts/as well as adblock edge. Works really well.

author: rdl
author_rank: Super Contributor
timestamp: November 13, 2014, 06:40:51 pm
content: All I use is NoScript and Ghostery and I rarely see an ad. Once you have these installed, you'll see what an amazing amount of crap many web pages try to serve you. It's not unusual for there to be 20 or more scripts/trackers.My NoScript whitelist is only about 25 entries, but I do frequently have to manually allow some scripts to run. It does take a bit of experience before you get a good feel for what to allow in order to actually see the content you were looking for.
Glow in the dark cycle paths, no solar panels, no electronics.  - Page 1
Forum section: electronics / general

author: trevwhite
author_rank: Frequent Contributor
timestamp: November 14, 2014, 12:33:23 am
content: This looks brilliant and seems to actually be very real unlike the solar roads idea.http://www.bbc.co.uk/news/technology-30024883

author: coppice
author_rank: Super Contributor
timestamp: November 14, 2014, 07:59:37 am
content: Quote from: trevwhite on November 14, 2014, 12:33:23 amThey use solar cells and LEDs to supplement the glow in the dark paint, although it appears the solars cells are in a fairly conventional location.This is an interesting novelty, that you might consider a work of art. You can't compare it to the other projects this forum has looked at, which supposedly exist to produce considerable amounts of energy in practical ways.

author: trevwhite
author_rank: Frequent Contributor
timestamp: November 14, 2014, 08:33:48 am
content: I think the comparison is something real that works and is out there against something claiming to do everything and that does not actually exist. I did not see that it used leds, etc but I think it is great.

author: G7PSK
author_rank: Super Contributor
timestamp: November 14, 2014, 08:43:01 am
content: We used to have that outside Windscale. The so called tritium trail where the tankers carrying the heavy water left a trail of drips on the road.

author: Towger
author_rank: Super Contributor
timestamp: November 14, 2014, 08:49:43 am
content: Quote from: G7PSK on November 14, 2014, 08:43:01 amDid they ever solve the problems with the radioactive pigeons and their radioactive shit?

author: coppice
author_rank: Super Contributor
timestamp: November 14, 2014, 10:25:39 am
content: Quote from: G7PSK on November 14, 2014, 08:43:01 amWhen energy is involved almost everyone lies. When the military is involved almost everyone lies. Windscale combines energy and military production, so there seems no possibility at all of ever getting a balanced picture of that place.

author: Deamiter
author_rank: Newbie
timestamp: November 14, 2014, 05:30:30 pm
content: A good rule of thumb is that stuff that glows in the dark (charged by incident light) can either be bright enough to be useful OR last all night, but not both.If you're willing to limit the glow to just last through the early evening -- when most pedestrians are using the paths -- it could work quite well, but there's no way it will be lit for early morning traffic.
Mightyboard for a 3d printer with an ATMega 2560 - Page 1
Forum section: electronics / general

author: Trax
author_rank: Regular Contributor
timestamp: November 13, 2014, 06:25:52 pm
content: Hi,I'm looking for a Mightyboard for a CTC 3d printer with an ATMega 2560 chip,or a cheep Mightyboard I would do the chip replacement myself.Does anyone here knows a source of cheep Mightyboards?And is that the right forum area for such a question?CheersTrax
Perovskite, a new material for PV cells: Polish scientist refined its production - Page 1
Forum section: electronics / general

author: CJWarlock
author_rank: Contributor
timestamp: November 12, 2014, 03:06:31 am
content: I've just red an interesting article on the subject of alternatiive PV cells materials.In short(and simplified): "perovskites" are the newer, alternative material for making photovoltaic cells, the method of making perovskites was hard and its result wasn't too satisfying until recently, when a polish scientist woman, Olga Malinkiewicz refined that method so now thinner, smoothly-surfaced perovskites films on the cells are possible and so the cells could be elastic too. I've attached original photos from the article after fixing them a bit.QuoteLink to the original article:http://naukawpolsce.pap.pl/en/news/news,400042,the-missing-solar-cell-polish-researcher-improved-the-production-of-perovskites.htmlSomeadditional stuff:-Perovskitesat Wikipedia- Efficiency of perovskite PV cells:Perovskite Solar Cells Beat New Records (In The Lab)
New category suggestion for the EEVblog forum - Page 1
Forum section: electronics / general

author: belasajgo
author_rank: Contributor
timestamp: November 10, 2014, 06:44:39 pm
content: I know that the EEVblog and this forum is about electronics engineering, but wouldn't you find it useful / interesting to also have a category about electrical wiring? As we have the categories "Test Equipment" and "Other Equipment & Products", we could also have a category named "Electrical Wiring" for topics related to electrical wiring and other related stuff. There are already a few topics that have somewhat to do with electrical wiring (as example the topics about surge protection). And I would also find it interesting to see discussions about electrical wiring and about the different wiring standards in different countries. What do you think?

author: Unknown
author_rank: Unknown
timestamp: November 11, 2014, 06:33:14 am
content: Quote from: belasajgo on November 10, 2014, 06:44:39 pmAs long as it doesn't turn into the typical Whirlpool thread of precious people having a sook and cry the moment someone mentions they are going to run their own data cabling despite not having the appropriate licence, then having the thread locked by just-as-precious moderators because it's "unlawful".Exhibit 'A':http://forums.whirlpool.net.au/archive/1637663

author: Smokey
author_rank: Super Contributor
timestamp: November 11, 2014, 06:41:10 am
content: Quote from: Halon on November 11, 2014, 06:33:14 amFunny.. that is exactly what I was worried about too!!

author: EEVblog
author_rank: Unknown
timestamp: November 11, 2014, 07:05:36 am
content: Not even close to being a big enough topic to warrant a section on the forum I think.Many other things would have 10 times the appeal and they don't have their own sections yet.
Tektronix 1230 Logic Analyzer Battery Replacement - Page 1
Forum section: electronics / general

author: bullet308
author_rank: Frequent Contributor
timestamp: February 26, 2013, 01:51:53 pm
content: Hi:Have one of these units that I am prepping for resale. It passes all POSTs fine except for the onboard battery. When I pop the top cover off, I see two coin cells on one of the main boards, which is fine but the board also has silk-screened on it a warning about referring it to a service tech for battery replacement. I am concerned that the batteries preserve critical calibration data and that the batteries have to be swapped in a specific sequence or some such, but I have been unable to locate any instructions for this online.Anybody out there know about how to swap the batteries in one of these things?Thanks-Tom

author: mdanh2002
author_rank: Contributor
timestamp: November 10, 2014, 03:26:59 pm
content: Hi,It's sad to see that nobody has replied you after a year! Unfortunately that is usually the case for questions on these types of vintage machines.I have a Tektronix 1230 logic analyzer myself, and the battery is also dead. I know what you're referring to - it's the message CAUTION: REFER BATTERY REPLACEMENT TO QUALIFIED TECHNICIAN printed on the circuit board. I replaced them nevertheless, not in any specific order, and the unit still seems to work just fine. So you can just proceed to replace yours.The battery is only to keep the RTC clock settings (which has some kind of Y2K issues - setting 2014 as the year and you'll see 1914 after a reboot), the various channel, probe and acquisition settings (all of which can be configured from the menu), as well as the capture memory samples (2k data points I believe).You can see a detailed review of the unit here on my blog:http://minhdanh2002.blogspot.sg/2014/10/tektronix-1230-logic-analyzer.htmlSee also this article on how I managed to develop a simple tool to capture the printer output from this logic analyzer parallel port, store on the SD card and converted it back to a bitmap file for viewing:http://minhdanh2002.blogspot.sg/2014/02/capturing-data-from-tektronix-1230.html

author: free_electron
author_rank: Super Contributor
timestamp: November 10, 2014, 03:37:04 pm
content: simply swap the battery when the machine is running. these things always have a current steering diodes.
Practical Wireless October 1975 Crossword... - Page 1
Forum section: electronics / general

author: LektroiD
author_rank: Frequent Contributor
timestamp: November 07, 2014, 11:56:00 am
content: I thought you guys might like this, so I scanned it from one of my old Practical Wireless magazines... Let's see how many you can get right...I have few of these magazines from around that era which I'd like to send to Dave, although I can't afford shipping to Australia just now, as I've been out of work following a road traffic accident last year, so funds are tight... I'll get them over to him once I'm fighting fit and have spare cash again.

author: PointyOintment
author_rank: Frequent Contributor
timestamp: November 09, 2014, 01:13:47 pm
content: Oh, a cryptic crossword! This should be fun.I got the following: Across: 8, 9, 10?, 12?; Down: 2, 4?, 5.

author: calexanian
author_rank: Super Contributor
timestamp: November 09, 2014, 09:23:03 pm
content: For Amusement only? To heck with that. Get a pool going!
TFT  LCD design - Page 1
Forum section: electronics / general

author: Jane
author_rank: Frequent Contributor
timestamp: October 17, 2014, 08:28:51 am
content: Hi,Does anyone know what TFT LCD has design?I found out one design athttp://electronics.howstuffworks.com/lcd2.htmMy question:If there are few black regions/spots ( several millimeters in size) on the LCD, does it mean the glass front filter( E marked there in the picture) is broken or the liquid crystal layer( D marked) is broken ?Thank you for your feedback

author: tom66
author_rank: Super Contributor
timestamp: October 17, 2014, 08:49:04 am
content: Usually, bad TFT layer (bad transistors on panel) so non-repairable issue. (Dead pixels?)

author: Jane
author_rank: Frequent Contributor
timestamp: October 17, 2014, 09:14:45 am
content: And how it can happen? By a strong pressure? And if I dismantle that LCD, can I see that damage there( under a microscope)? So that I can be sure it is the liquid crystal layer problem and not the glass front filter problem.

author: RLBennett
author_rank: Contributor
timestamp: November 05, 2014, 07:55:54 pm
content: Jane,I have a similar problem with my O'Scope and two of my ham radio transceivers. They started with a small blotch in the center of the displays and the blotch propageted to almost the whole display. I also want to know if the LCDs can be fixed. A replecement for the scope costs more than the scope and replacements for my radios are not available. I wonder if I clamped the displays with a few pounds of pressure and a little bit of heat would correct the failure.If anybody has any advice on repairing this type of failure, please post it, unless anybody has a Sharp LM32P10 and/or a DLC display for Icom IC-706 radios they would like to send to me. Another thought is to try to inteface a small computer display to the O'Scope. Any thoughts on an interface? Anybody?Tnx & 73Rob WD4DUI
Any good pan/tilt web camera? - Page 1
Forum section: electronics / general

author: zapta
author_rank: Super Contributor
timestamp: November 07, 2014, 12:42:50 am
content: I am looking for a pan/tilt camera that can be controlled and viewed using an Android phone over the internet. I tried two (Dlink and Foscam) but couldn't manage to access them over the internet, just using local WiFi. Cost let's say $200-$300 is ok.Any suggestion for something that will work reliably out of the box?

author: Grandmastersexsay
author_rank: Contributor
timestamp: November 07, 2014, 01:57:40 am
content: Try again with Foscam + Dynamic DNS + IP Can Viewer appThey're obviously not the best quality, and are not suitable for commercial applications. However, they're hard to beat for under $100.
New here, am I in the right place? P&P machine FS. - Page 1
Forum section: electronics / general

author: Digitimer
author_rank: Newbie
timestamp: October 30, 2014, 10:09:32 am
content: Hello all,I've come across your forum when I found a link at electricstuff.co.uk,I did try registering there but as of yet not been accepted by an admin.We have a Versatronics RV4S Pick & Place Machine, a SMT Reflow oven (Conveyor belt type), and a screening machine...Would this be the right website to get advice on where to sell them all (I know little about them).Any help appreciatedJoe

author: daqq
author_rank: Super Contributor
timestamp: October 30, 2014, 10:42:01 am
content: Welcome to the forum!QuoteSure, if you want a broader audience, try ebay, craigslist or similar. They do have specialized enough categories most of the time.By the way, how much are you asking?

author: fcb
author_rank: Super Contributor
timestamp: October 30, 2014, 10:54:46 am
content: www.electricstuff.com/forumWhich country are you in?

author: TopLoser
author_rank: Unknown
timestamp: October 30, 2014, 10:57:34 am
content: Quote from: fcb on October 30, 2014, 10:54:46 amI'm guessing.... Welwyn Garden City (England)

author: Digitimer
author_rank: Newbie
timestamp: October 30, 2014, 11:02:38 am
content: Hi,Thanks for the replies, Yes, Correct, Welwyn Garden City, Hertfordshire, UK.I have no idea on price I'm afraid, I only just about know what it is!J.

author: Digitimer
author_rank: Newbie
timestamp: November 03, 2014, 02:50:42 pm
content: I've started listing these on eBay (They go live this evening), where would be the best part of this website to make anyone interested aware?ThanksJ.

author: wraper
author_rank: Unknown
timestamp: November 03, 2014, 02:53:15 pm
content: Quote from: Digitimer on November 03, 2014, 02:50:42 pmBuy/Sell/Wantedhttps://www.eevblog.com/forum/buysellwanted/

author: Digitimer
author_rank: Newbie
timestamp: November 04, 2014, 09:17:14 am
content: Done. Thanks all.https://www.eevblog.com/forum/buysellwanted/fs-versatronics-rv4s-pick-place-machine-reflow-oven-paste-machine/
Window functions in Oscilloscope  - Page 1
Forum section: electronics / general

author: adithya.yuri
author_rank: Newbie
timestamp: November 03, 2014, 02:10:45 pm
content: Hi,I was playing around with the scope and saw the various window functions for FFT analysis.Could somebody tell me which function is designed for what purpose .This is photo of my DS1052.Thanks.

author: MarkL
author_rank: Unknown
timestamp: November 03, 2014, 02:56:15 pm
content: Been answered many times. Here's one thread:https://www.eevblog.com/forum/testgear/filter-selection-spectrum-analyser-fft/msg303392/#msg303392

author: adithya.yuri
author_rank: Newbie
timestamp: November 03, 2014, 04:17:29 pm
content: Thanks for reply that thread was great
PCB house with 3 day turn - Page 1
Forum section: electronics / general

author: richcj10
author_rank: Unknown
timestamp: November 03, 2014, 01:31:30 am
content: Does anyone know a good PCB house that does three day turn at a reasonable price?

author: zapta
author_rank: Super Contributor
timestamp: November 03, 2014, 02:37:51 am
content: Have you checked pcbshopper.com?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 03, 2014, 04:56:12 am
content: What's reasonable? 3 day isn't going to be a "good" price, no matter where you get it from..

author: richcj10
author_rank: Unknown
timestamp: November 03, 2014, 04:58:45 am
content: Quote from: zapta on November 03, 2014, 02:37:51 amThanks I found expresspcb that will do 3 day for 300 for three. That seems reasonable....
ChipQuik syringe assembly - Page 1
Forum section: electronics / general

author: LukeW
author_rank: Frequent Contributor
timestamp: November 05, 2014, 06:28:31 am
content: I have here some ChipQuik solder paste and flux. Has anyone used these before?They're packaged in syringes just like this:http://www.proto-advantage.com/store/images/PRODUCTS/SMD291_0.JPGThe thing is, it's supplied as a disassembled kit, and the syringe plunger handle doesn't fit into the piston. It doesn't mate with it at all.Am I doing something stupid here? Is there a part missing from the kit, like a rubber piston that fits onto the end of the handle?Or is it designed for use with a pneumatic system and not used manually?

author: Howardlong
author_rank: Super Contributor
timestamp: November 05, 2014, 06:52:58 am
content: I have an SMD291 and SMD4300TF10 here, and both appear to be like yours. The plunger is a loose fit, there is no O ring on the plunger in either case. There is a sealed fit on the stopper already inside the tube though that the plunger "mates" with.

author: Psi
author_rank: Super Contributor
timestamp: November 05, 2014, 09:53:35 am
content: Yep, that's how they come.The syringe is intended to be used in dispensing machine and driven with compressed air.They just throw in that plastic plunger thing so you "can" use it by hand.The reason they dont supply the o-ring is because you literally cant push the plunger in if the o-ring is on you just end up compressing the air trapped inside.(However, if you do need to, you can get them on with an o-ring if you place a piece of wire beside the o-ring when pushing it on and then pull out the wire once its all the way down)I dont buy chipquik solder paste any more because of the plunger issues and because it seems to be a bit thicker than other stuff which makes it slow to respond to pressure on the plunger. It also makes it leak out of the needle after you have stopped pressing it.
user name - Page 1
Forum section: electronics / general

author: joedz
author_rank: Newbie
timestamp: October 31, 2014, 11:40:09 pm
content: my user name and password was removed from the eevblog forum anybody have this happen to them?

author: Falcon69
author_rank: Super Contributor
timestamp: November 01, 2014, 02:13:48 am
content: I would thing one of two things.1. You've been banned and Dave chose to just delete your name alltogether...or 2. which is more likely.....2. You signed up as a member between the time the server was functioning fine, backup was saved, then server went all wonky on everything and was rerolled back to it's last save point. In that case, I would think that anyone, not just you, would have been lost in computer space.

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 01, 2014, 02:55:38 am
content: In another thread, joedz said he has been a member of this forum "for years".It does seem extraordinarily odd.I didn't loose my name/account, but a rather lengthy post I made a day or two ago just disappeared into the ether.Oh well. That is the interweb for you.

author: Falcon69
author_rank: Super Contributor
timestamp: November 01, 2014, 03:19:00 am
content: ya, that is odd.Even if he was banned, I don't think Dave would just delete the name....maybe change his password so he couldn't log on, but not delete the name.Joedz, I would try emailing Dave and see what's up with that.
Dodgy PP film capacitors? - Page 1
Forum section: electronics / general

author: Artlav
author_rank: Frequent Contributor
timestamp: October 30, 2014, 11:10:35 am
content: I was making a scope CRT into a vector display, and ran into a peculiar problem.There were occasional artefacts on the screen - curles and spirals visible for fractions of a second, almost like what you'll see in a cloud chamber.I couldn't make heads or tails of it, and went all the way from firmware through wiring, to DAC and deflection amps - everything was fine.Turns out the problem was in a completely different place.The thing needs 1000V anode supply, of a few mA.A simple push-pull converter from 12V.Naturally, it have an output smoothing capacitor.I used a PP film capacitor, rated for 2000V.These ones:And guess what?They were the problem.I noticed it purely by accident - having placed some electrolytics in series in it's place to rule out any power supply noise, seeing the problem vanish and then scaling down trying to find the right capacitance.Electrolytics - no problems.Two 630V WIMA capacitors - no problems.Either of the two capacitors above - problems.Either of the two of them in parallel with anything else that worked -problems!I guess it arcs on the inside, and causes the voltage to dip momentarily, making the beam wander on the screen in a peculiar fashion.Is that normal for this type of capacitors?Or are they perhaps rated in Chinese volts (3 for the price of 1)?

author: SeanB
author_rank: Super Contributor
timestamp: October 30, 2014, 08:22:36 pm
content: Probably a 600V film being way overrun. Thin leads as well. Only way is to crack the case off and unwind it to see the massive areas where the foil coat has been arced away. Try using 3 in series, that will likely work well enough, or buy real brand name 2kv caps which are likely to be much bigger.

author: Richard Head
author_rank: Frequent Contributor
timestamp: October 31, 2014, 07:55:46 am
content: Are you sure those caps are polypropylene and not polyester?
new chips - Page 1
Forum section: electronics / general

author: bowleggedrooster
author_rank: Newbie
timestamp: November 05, 2014, 08:47:26 pm
content: Where can i find the newest chips that hit the market? Is there a site or news sheet thatgives new developed chips for exsample many times i get all the coponets together for a task only to find a new chip later that i could have used if i only new ahead of time!?

author: gibbled
author_rank: Regular Contributor
timestamp: November 05, 2014, 09:18:54 pm
content: Here's a couple of links...http://mouser.com/new/http://www.digikey.com/en/resources/whats-newThere are also trade publications like EDN.
Interesting Silicon Security Talk  - Page 1
Forum section: electronics / general

author: marshallh
author_rank: Unknown
timestamp: October 29, 2014, 06:16:37 pm
content: Having met him a couple times I can say he is very, very good at this. He's less methodical/disclpined and more "RE the entire chip by staying away for 3 days straight". He doesn't really use any software at all. He just spends days in Photoshop making hundreds of layers and mapping the thing out in his head. I don't think he's even had an automated imaging setup until recently (manually taking tens of photos of chip dies and autostitching them)If you want another good talk look up "dmitry backside ic probing"
PICKit 2 vs. PICKit Serial Analyzer - Page 1
Forum section: electronics / general

author: Chipguy
author_rank: Unknown
timestamp: October 27, 2014, 07:52:52 pm
content: Hi !I got the PICKit Serial Analyzer today and of course:Don't turn it on, take it APART !Opening that it became obvious that the PICKit Serial Analyzer is the same as a PICKit 2 minus the flash chips and some miscellaneous circuity, maybe the programming voltage generation.I think in EEVBlog #39 Dave mentioned that the PICKit2 can also be used as an Analyzer.So I think I got ripped off, sort of.I wonder if I could have got yet another PICKit2 and uploaded the Analyzer firmware.Looking forward to hear about your experiences with that one.Cheers,Chipguy

author: 22swg
author_rank: Frequent Contributor
timestamp: October 29, 2014, 08:56:24 am
content: I had 2 PK2's and one turned belly up so 'invested' in a PK3 with PIC16fs this was little used, carried on with PK2 ... now moved on to PIC24s and have 2 PK3 ( price drop recently) and use the PK2 mostly as serial analyzer. would like to repair the PK2 but to sure which bit its dead.

author: dannyf
author_rank: Super Contributor
timestamp: October 29, 2014, 11:05:36 am
content: Pickit2 all the way here,programmer, serial analyzer and logic analyzer. It does everything other than toasting my bread,Too bad for Microchip that it abandoned pickit2.