hybridfree/eevblog-posts huggingface dataset:
Do not dry your underpants ... - Page 1
Forum section: electronics / general

author: Bored@Work
author_rank: Super Contributor
timestamp: August 06, 2012, 06:15:20 pm
content: ... in the microwavehttp://www.guardian.co.uk/uk/2012/aug/06/dorset-fire-underpants-microwave"The fire safety message here is to never put clothing of any kind in the microwave or an oven to attempt to dry them."Doh!

author: FlyingBrickyard
author_rank: Contributor
timestamp: August 06, 2012, 06:22:32 pm
content: QuoteNo. Clearly the message is, "Take them out 30 seconds earlier".I mean, obviously itdoeswork, since they couldn't very well catch on fire if they were still wet, could they?

author: Bored@Work
author_rank: Super Contributor
timestamp: August 06, 2012, 06:28:45 pm
content: I think you have to argue that with Dorset Fire and Rescue.

author: SeanB
author_rank: Super Contributor
timestamp: August 06, 2012, 06:35:15 pm
content: No, means they are dry in spots.............

author: Fraser
author_rank: Super Contributor
timestamp: August 06, 2012, 07:22:49 pm
content: Reminds me of that horror news story where an elderly women tried drying her miniature dog in the microwave, as that is what she had always done previously....... but using a conventional electric oven. No surprises....the dog died.No idea if it is a true story, but the thought sends shivers down my back....imagine the pain of being cooked in a stream of microwave energy !The following web page classes it as Lore rather than fact BUT it claims acts of cruelty have involved microwaves and live animals.http://www.snopes.com/horrors/techno/microwavedpet.aspNow if I caught the little b*st*rd who did that, I would be tempted to expose him to the fury of a magnetron at close range.

author: WorldPowerLabs
author_rank: Regular Contributor
timestamp: August 06, 2012, 07:58:16 pm
content: I've dried underwear and socks in the microwave... did char the underwear once doing that, so I stopped after that. No time for laundry when you're studying for your degree!
Mars Landing Streams No Brower Needed Cross Platform - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 05, 2012, 09:40:36 pm
content: Get Mplayer Heremplayerhq.huthen use these commandsRTMP Needed SD Feedrtmpdump -r "rtmp://cp39920.live.edgefcs.net:1935/live" -a "live" \-f "WIN 10,3,183,7" -W "http://cdn1.ustream.tv/swf/4/viewer.rsl.755.swf" \-p "http://www.nasa.gov/multimedia/nasatv/ustream.html" \-y "nasahd@55196" -v | mplayer -HD 2 GIGA Bytes a hourmplayer "http://nasa-f.akamaihd.net/public_h264_700@54826"
CNC Controllers - Page 1
Forum section: electronics / general

author: Dane Bear
author_rank: Contributor
timestamp: August 05, 2012, 04:45:48 pm
content: I am wanting to do repair on CNC machine tools. What are some basic tools to troubleshoot servo motors, boards, drive cards, etc? I have a Fluke 289 but that is it. Thanks Everyone!

author: deephaven
author_rank: Frequent Contributor
timestamp: August 05, 2012, 06:09:10 pm
content: A scope, the schematic for each board, and an understanding of how the various parts of the circuitry work.
Old computer music composer - Page 1
Forum section: electronics / general

author: Slothie
author_rank: Regular Contributor
timestamp: August 04, 2012, 08:42:57 am
content: I've been searching through some old electronics magazines for a project for a circuit that composed tunes and played them in real time.Unfortunately my collection has been decimated over the years and I've drrawn a blank. I'm pretty sure it was in either E.T.I. or Practical Electronics in the late 70's, early 80's. It was based on the SC/MP microprocessor (that kind of dates it to the late 70's!).I remember being facinated by the idea at the time but it way out of my budget at the time. If anyone has any info on it (hey, you might even be the author!) or even better a copy of the artical I'd love to see it and would be eternally grateful. Info on similar projects would also be of interest.I've tried googling but all the terms I come up with draw a blank. Maybe its not on the interwebs!Ian

author: Zad
author_rank: Super Contributor
timestamp: August 05, 2012, 05:50:52 am
content: Elektor did an SC/MP computer in the late 70s, and the Elektor Junior Computer a few years later. I still have the PSU PCB partly populated, and the keyboard PCB with resist carefully drawn on, ready to etch. I must only have been 12 or so at the time! I actually learned how to program from the Junior Computer series of articles, manually working out how the processor shuffled binary numbers around.I can't really post anything without breaching copyright, but Googling for Elektor SC/MP or Elektor Junior Computer comes up with plenty of results.

author: Slothie
author_rank: Regular Contributor
timestamp: August 05, 2012, 01:38:58 pm
content: Quote from: wilfred on August 04, 2012, 11:05:29 amThanks for those links. Hope I don't overload on nostalgia!!I recall the author of the original article claiming the SC/MP was pretty maxed out - momentary pauses between stanzas while it calculated the next bit. And the tunes where very simple, I recall the article claiming they sounded a little "Medieval".Quote from: wilfred on August 04, 2012, 11:05:29 amAlas I don't still have an SC/MP. I used to have an old Sinclair MK14 I bpught second hand but that got chucked in the early 90s when to me it was just some bit of old junk. Still kicking myself for that one.But you can do a pretty good emulation on a PIC in real time, asthis lady shows.I was going to port the algorithm to Arduino or similar, but thinking about it, it'd be way cooler to emulate the SC/MP and run the original hardware!
Does anyone know what this test equipment is? - Page 1
Forum section: electronics / general

author: codeboy2k
author_rank: Super Contributor
timestamp: August 04, 2012, 06:31:40 am
content: I was watching some videos from Power Integrations, they use this test gear on several videos, but I can never see a model number. I was curious about it.From the colors it looks like a B+K Precision model, and searching for it based on the features I can see in the video didn't help me at all.It seems to have Volts, Amps, Watts, phase degrees? Power Factor, harmonics? etc.Here's a snapshot of the closeup they use in the videos. It looks like a 5-1/2 or 6 digit triple display DMM with special features for measuring power convertors.If you know the model, please tellThanks in advance.

author: Psi
author_rank: Super Contributor
timestamp: August 04, 2012, 06:51:14 am
content: I find it interesting that the scale goes up to "Mega" volts/amps/watts

author: oPossum
author_rank: Super Contributor
timestamp: August 04, 2012, 06:55:24 am
content: Yokogawa WT210

author: codeboy2k
author_rank: Super Contributor
timestamp: August 04, 2012, 07:55:43 am
content: Awesome Possum !!thanks! that was quick!Now I get to study it more

author: PeterG
author_rank: Frequent Contributor
timestamp: August 04, 2012, 08:01:20 am
content: This looks to be close to what your looking for.http://www.ainuoworld.com/product/ac-dc-digital-power-meter-an8722p-f-an8711p-f.htmlRegards

author: rolycat
author_rank: Super Contributor
timestamp: August 04, 2012, 01:37:47 pm
content: It's a shame that the month section of the DeLorean time circuit display is impossible with real LEDs.I guess 16-segment starburst letters just didn't look cool enough for Bob Zemeckis
An EE did not design this show... - Page 1
Forum section: electronics / general

author: joblessalex
author_rank: Contributor
timestamp: August 03, 2012, 04:50:54 am
content: Close enough to topic I guess, have a peek at this and see how many electronically incorrect things you can spot before your brain explodes! Honestly, I enjoy the entire thing running on .9v to be the best!

author: nitro2k01
author_rank: Frequent Contributor
timestamp: August 03, 2012, 10:33:13 pm
content: Somehow that percentage scale reminded me of...
replacing flywheel diode in SMPS - Page 1
Forum section: electronics / general

author: SnakeBite
author_rank: Regular Contributor
timestamp: July 30, 2012, 02:13:18 pm
content: Hi,i'm attempting to repair my speaker amplifier and there is a flywheel diode there on the DC to DC converter. the diode model is MUR1520 and i'vi don't have it available here in Israel (i know ebay have it) so i found a diode form the same manufacturer that has almost identical specs.except:DC Blocking Voltage of 600V instaed of 200v in the original - which i think it's OK.Average Rectified Forward Current of 120A instead of 200A - which i also think it's OK since it's 300w buck converter.Reverse Recovery Time of 30ns instead of 35ns - quicker is beter i think.Maximum Instantaneous Forward Voltage: at 25c: 2.2V instead of 0.85v in the original -i don't know if this 1.35V is criticalat 125c: 1.6V instead of 1.05V in the original -i also don't know.here are the datasheets:www.onsemi.com/pub/Collateral/MUR1520-D.PDFwww.irf.com/product-info/datasheets/data/15eth06.PDFhere is the circuit of the DC - DC converterhttp://www.tgahinfo.homecall.co.uk/S750%20PSU/Data%20Sheets/Buck.jpgit's mark as D4.thanksIdoaricha

author: SeanB
author_rank: Super Contributor
timestamp: July 30, 2012, 04:05:45 pm
content: Not going to make a difference. What killed the original diode, they normally only fry if they fall off the heratsing or the capacitor goes short circuit. The higher voltage drop is only going to increase the standoff voltage on the switching transistor by that amount, Not an issue with 600v there to begin with.

author: SnakeBite
author_rank: Regular Contributor
timestamp: August 02, 2012, 09:54:45 am
content: it's works now!!thanks

author: amyk
author_rank: Super Contributor
timestamp: August 02, 2012, 10:35:55 am
content: Keep in mind that the higher forward voltage can cause it to run hotter due to the higher power dissipation, this is more important if you're replacing a main output rectifier.

author: SnakeBite
author_rank: Regular Contributor
timestamp: August 03, 2012, 01:24:51 pm
content: i check the forward voltage before i insert the diode and it read 0.4V so i don't think it's too bad.the voltage i mention is the MAXIMUM voltages. and the 15ETH06 diode that i put now is rated for 600v max forward voltage vs 200v in the mur1520. so i think it will be fine.

author: T4P
author_rank: Super Contributor
timestamp: August 03, 2012, 03:43:08 pm
content: 0.4V at the currents your meter is reading at.If the average current drawn is 2amps it easily goes up to 0.7V @ 150Cor if it's at 25C it's 1.35V1.35*2 = 2.7W ...if you leave it without a heatsink on the board this is going to be overheated easily ... if it's a TO-2201C+70C/W = 71C 71*2.7 = 191.7C ...just remember to solder the thermal pad using a hot air if you use the DPAK
Whats missing from the Olympics? - Page 1
Forum section: electronics / general

author: kfitch42
author_rank: Frequent Contributor
timestamp: August 03, 2012, 02:16:13 am
content: Starcraft?Soldering? You could have separate through hole and surface mount events.

author: Things
author_rank: Regular Contributor
timestamp: August 03, 2012, 03:03:22 am
content: Troubleshooting competition, everyone is given a piece of equipment that has been purposely modified to fail in the same place and you have to track down the problem

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: August 03, 2012, 04:41:25 am
content: I would watch a mobo flinging contest like the discus throw.I would also watch a timed tear down contest for a photocopier, or a mainframe (all tubes of course)- disassemble completely, put back together, turn it on.The medals would be a pcb of some award winning 555 circuit with traces in gold, silver and bronze.

author: Bored@Work
author_rank: Super Contributor
timestamp: August 03, 2012, 05:01:43 am
content: This Australian guy tried to add some national sport to the programhttp://www.theaustralian.com.au/sport/london-games/aussie-rower-faces-early-exit-after-police-arrest/story-fne3b7l5-1226441795573

author: Unknown
author_rank: Unknown
timestamp: August 03, 2012, 05:18:05 am
content: Quote from: Bored@Work on August 03, 2012, 05:01:43 amHe was kidding himself! Everyone knows London are the world champs at shopfront riots and looting!

author: vk6zgo
author_rank: Super Contributor
timestamp: August 03, 2012, 06:09:20 am
content: What's missing from the Olympics (but not from EEVblog)?Jumping to conclusions.Riding your hobbyhorse.Flogging a dead horse.Leading a horse to water.Going off in High Dudgeon.All great sports,I bet you can think of some more.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 03, 2012, 12:59:13 pm
content: Quote from: kfitch42 on August 03, 2012, 02:16:13 amThere is a Skills Olympics that includes electronic assembly, as well as things like resturant service, painting & decorating etc.

author: olsenn
author_rank: Frequent Contributor
timestamp: August 03, 2012, 01:16:16 pm
content: StarCraft is considered the national "sport" of Korea. I suppose when you think about it, the Olympics is all about stressing physical activity to the max, and the brain is the most important muscle we have... let's keep this post PG-13
ATMLU036/2EB 1 is a 24HC256 clone? - Page 1
Forum section: electronics / general

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: August 02, 2012, 09:29:38 pm
content: I bought two 24hc256 DIP8s recently on eBay and expected them to be from ST or Atmel with some marking resembling 24HC256, but what I got is two DIP8s marked as "ATMLU036 / 2eb 1 / 0F6971". Anything known about these? Cheap clones or reliable 3rd source?

author: vivaT
author_rank: Contributor
timestamp: August 02, 2012, 11:20:21 pm
content: I had the same question for some 24C02B chips off an logic analyzer, only at the start i didn't know what they were. The markings for those chips was: ATMLH928 02B 1Another post suggested these were as below, but its a bit inconsistent labeled so take with pinch of salt:ATMLH[3 digit datecode]2[some letters]They seam to be common on branded consumer gear like samsung tvs. cheap.

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: August 02, 2012, 11:42:08 pm
content: Ok, dumb me. This is an original Atmel part and marked as described in the marking scheme inside the data sheet. I had a look in the user manual before, but there was no description of the marking.So this is indeed an AT24C256B produced in week 36 of 2010 and 0F6971 is the lot number.
History of Us, Electrical Engineering  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: August 02, 2012, 08:44:20 am
content: who knew electrical engineering was more magic tricks back in day

author: Short Circuit
author_rank: Frequent Contributor
timestamp: August 02, 2012, 10:42:03 am
content: still is, for most people
Don't suppose anyone has a HUF75344G3 lying around?  - Page 1
Forum section: electronics / general

author: Chet T16
author_rank: Frequent Contributor
timestamp: August 05, 2012, 01:15:54 am
content: Or equivalent!I'm finding it very hard to find some that aren't £10 each or 1.50+20 delivery from Farnell/mouserI only need one!

author: Chet T16
author_rank: Frequent Contributor
timestamp: August 05, 2012, 01:17:16 am
content: http://www.fairchildsemi.com/ds/HU/HUF75344G3.pdf

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 05, 2012, 01:35:06 am
content: Just use any power MOSFET with the same or greater voltage and current ratings and the same or lesser RDSon. The switching speeds are unlikely to matter unless it's being used at very high frequencies.

author: Chet T16
author_rank: Frequent Contributor
timestamp: August 05, 2012, 03:36:31 pm
content: Thats a sensible idea but at 2am and trying to do it on my phone it wouldn't have worked very well so a mini rant was the best i could come up with
Why Would You Choose intelligence ? - Page 1
Forum section: electronics / general

author: Stephen Hill
author_rank: Regular Contributor
timestamp: August 02, 2012, 10:23:13 pm
content: My iPad tells me the video is unavailable.However, I'll answer your thread title with another question: Wouldn't you need intelligence to make that choice?

author: Mechatrommer
author_rank: Super Contributor
timestamp: August 03, 2012, 12:13:23 am
content: no no no. the right question is... why apes need intelligence? because someday, human will self destruct and apes will rule the world. bwahahaha

author: Obi_Kwiet
author_rank: Regular Contributor
timestamp: August 03, 2012, 02:09:32 am
content: Competition isn't a great venue for intelligence. Co-operation is. You land a human on mars, I guarantee you that everyone who is able will be watching it.This guy is just bitter because he is out of shape. I guarantee that an engineering major, or a PHD researcher is going to end up making a lot more than the vast majority of guys who were on the high school football team, or went to try and make it in Hollywood. Yeah, the guys who do make it in entertainment or sports do well, but only a very small handful of people can actually do well there. The rest do very poorly.

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: August 03, 2012, 04:47:46 am
content: Intelligence make in on TV all the time: Jeopardy! has been on the air for decades. ESPN routinely show the Spelling Bee. Cable has a myriad of "edutainment" options. Classic pointless rant.

author: bullet308
author_rank: Frequent Contributor
timestamp: August 03, 2012, 04:11:11 pm
content: I find him slightly less than amazing.Really, this is the VERY sort of guy that makes me want no part of the label, "atheist".His daddy was probably a preacher.

author: mukymuk
author_rank: Contributor
timestamp: August 03, 2012, 05:06:43 pm
content: QuoteI've seen that not to be the case so many times in my life that I just can't believe it anymore.
Kevin Slavin: How algorithms shape our world  - Page 1
Forum section: electronics / general

author: diracshore
author_rank: Regular Contributor
timestamp: August 02, 2012, 01:36:55 am
content: http://www.ted.com/talks/lang/en/kevin_slavin_how_algorithms_shape_our_world.html

author: PeteInTexas
author_rank: Frequent Contributor
timestamp: August 02, 2012, 04:49:38 am
content: Well, it certainly looks like people have lost more money in the stock market because of algorithms like today.Yeah, not a big fan of algorithms wielded by self proclaimed financial wizards with inflated sense of self importance. And we're supposed to give these guys bigger tax loopholes so they can have bigger bank roll in the financial casinos? We need common sense rules regulation. What they are doing is not the kind of work that build prosperous, yet sustainable economies.
MOVED: Plug in replacement for drifty FET opamp - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 01, 2012, 11:00:03 pm
content: This topic has been moved toProjects, Designs, and Technical Stuff.https://www.eevblog.com/forum/index.php?topic=9828.0
Graphic overlay front panel hot seller - Page 1
Forum section: electronics / general

author: Bella
author_rank: Newbie
timestamp: August 02, 2012, 07:47:36 am
content: Why choosewww.front-panel.net?1.many years experience. meeting your any design and provide you the solution service for front panel from design to finish.2. Good quality. Inspect every process two times and qualified products reach 99% or more.3. Have complete advanced workshops. Welcome to visit our factory.Contact us now ang happy to assist you.

author: Stephen Hill
author_rank: Regular Contributor
timestamp: August 02, 2012, 07:54:41 am
content: Quote from: Bella on August 02, 2012, 07:47:36 amHow many?

author: amyk
author_rank: Super Contributor
timestamp: August 02, 2012, 10:18:01 am
content: According to their website, established in 2003, so 9 years.It's still rather curious how there are entire companies built on just providing these pieces.
Rigol Ds1052e 100 Mhz Hack - Page 1
Forum section: electronics / general

author: Votality
author_rank: Contributor
timestamp: August 01, 2012, 01:41:29 am
content: If i ordered a rigol ds1052e today does the 100mhz firmware hack still work?Anyone out there bought one recently and tried the firmware hack?Or does it only work on particular versions/older revisions of the product.

author: rowant
author_rank: Contributor
timestamp: August 01, 2012, 02:48:57 am
content: scroll down like 6 threads..https://www.eevblog.com/forum/general-chat/hantek-tekway-dso-hack-get-200mhz-bw-for-free/

author: PeterG
author_rank: Frequent Contributor
timestamp: August 01, 2012, 04:57:18 am
content: It would be best to ask this question here.https://www.eevblog.com/forum/blog-specific/changing-the-rigol-ds1052e-to-ds1102e-using-usb-the-dummy-guide/Regards

author: Votality
author_rank: Contributor
timestamp: August 01, 2012, 08:25:31 pm
content: Thanks Peter thats exactly the thread i was after!
High-Voltage, Low Amperage DC-DC Converter Equivalent - Page 1
Forum section: electronics / general

author: bullet308
author_rank: Frequent Contributor
timestamp: July 31, 2012, 02:07:24 am
content: Hi:Dave's latest video on his DC-DC power converter reminded me of a product that I was very interested in at one point but couldn't justify the cost per unit:http://www.ebay.com/itm/Geiger-counter-power-supply-module-dosimeter-NEW-/160808650312?pt=BI_Security_Fire_Protection&hash=item2570f14648A compact little converter that takes 3v DC up to 400v DC at 100uA, specifically designed for driving Russian Geiger tubes. Just the ticket for the stuff I am playing with, but even in volume the price only drops to US$22 per unit. These are apparently ex-Warsaw Pact Cold War surplus. I am hoping this does not make them too exotic to find a replacement for.A quick survey of Mouser, Digi-Key and their cronies reveals nothing quite like it. I am hoping that somebody out there might know a trick, because building an HV power supply up out of parts is a bit annoying and rather too bulky for some of my applications. A turnkey solution would be preferred,Thanks in advance:

author: nitro2k01
author_rank: Frequent Contributor
timestamp: July 31, 2012, 02:32:31 am
content: If you're looking for something cheap to use in mass production, this probably isn't it. But you might want to look into modifying the flash circuitry from disposable cameras. Runs off of 1-2 AA batteries and outputs a fairly high voltage. May have a lot of disadvantages for your application, such as unregulated output voltage.

author: Psi
author_rank: Super Contributor
timestamp: July 31, 2012, 02:35:29 am
content: If you could get a higher +/- DC voltage using an off the shelf module you could use an opamp to generate an AC voltage, say 24V.Then feed that into a 16 stage diode/cap multiplier made from tiny SMT components.Since you only need 100uA the components can be small

author: IanB
author_rank: Super Contributor
timestamp: July 31, 2012, 03:14:14 am
content: As nitro said, disposable cameras contain a circuit that boosts 1.5 V DC to 300 V DC. If you fed a higher voltage in I am sure you would get a higher voltage out. You could perhaps put a feedback regulator around the circuit to get 400 V out by varying the input voltage.Alternatively you could cannibalize the coil and transistors to construct your own circuit.

author: bullet308
author_rank: Frequent Contributor
timestamp: July 31, 2012, 01:36:30 pm
content: Yeah, I am familiar with the disposable camera hack. Its not difficult at all either as a hack or a scratch-built circuit. The only question I have about that approach is the efficiency of the circuit in general and the transformer in particular. Though, the little module above only claims fifty-something percent efficiency to begin with, so I am not so sure that a simple transformer circuit could not beat that. I suppose I need to just build one and test it.
Voltmeter for old Eico 1064 power supply (60mm x 60mm)? - Page 1
Forum section: electronics / general

author: GnatGoSplat
author_rank: Regular Contributor
timestamp: July 27, 2012, 06:54:20 pm
content: I have an old EICO 1064 power supply that I've had for probably 20yrs. I got it with a smashed voltmeter which I had replaced with an LCD digital panel meter and covered the gaps with cardboard. It really looks ghetto, but it did the job.This is the exact one I have:http://www.oldtestequipmentarchives.com/item.htm?item=13I suddenly got the urge to make it look as close to its original appearance as possible. I was thinking to replace the digital voltmeter with something a little more authentic. I'm sure I won't find an original replacement voltmeter for it anyplace since it's over 40yrs old, but I thought maybe a generic one of the right size would look right at home there. Only problem is I'm having a heck of a time finding a 60mm square analog meter with rounded edges. I've searched eBay and Google, and found nothing.Any other places I can look?

author: Dawn
author_rank: Regular Contributor
timestamp: July 27, 2012, 09:09:51 pm
content: The three main manufactuers of that time were Hoyt,Crompton, and Modutec, besides GE and Weston which aren't going to be in an eico and didn't depart from their classic forms. I don't know who's around anymore. The upper 20 count of both meters isn't a typical off-the-shelf scale, although ideal for a 200 count DPM as you've probably found. Sixty MM is about 2 3/4" so it's a tough call to say it's an import. Have you popped the cover to see if the OEM is printed with the actual FS ua or ma of the meter? Was the original meter an actual volt meter or did it have an external series resistor as part of the volt meter circuit? Hoyt was well known for inexpensive, direct reading iron vane volt meters that was found on a lot of american made service grade equipment. Also try the antique radio radio forum, someone might have a lead or a junker.

author: FenderBender
author_rank: Super Contributor
timestamp: July 27, 2012, 09:12:57 pm
content: 2nd result after searching "panel mount volt meter" on eBay:http://www.ebay.com/itm/DC-Analog-Volt-Meter-Panel-Mount-0-20-VDC-PM020-DC-/120957380425?pt=Model_RR_Trains&hash=item1c299f2749&_uhb=1#ht_1394wt_111060mm x 60mm 0-20VDC

author: GnatGoSplat
author_rank: Regular Contributor
timestamp: July 30, 2012, 01:40:36 pm
content: I don't have the original meter. Then lens was physically smashed and was missing the needle, so I imagine when I removed it, I probably tossed it (hard to remember back 20yrs). However, the ammeter only says EICO on it with no OEM brand name marked on it anywhere.Thanks for the link, FenderBender. You're a better eBay searcher than me. I had my results sorted by price ascending so I gave up after about 10-pages.I'm starting to think maybe I should just replace both meters with LED digital panel meters since that would cost less than one analog meter and at least both meters would be identical.
(ESD) Safe storage of components question - Page 1
Forum section: electronics / general

author: sid
author_rank: Newbie
timestamp: July 30, 2012, 06:32:59 am
content: Hi,I've been wondering about storage of various components that I have, I'm trying to store active componentsmicro-controllers, DRAM chips, SRAM chips, 74 Logic and other stuff (you know the kind of stuff you left with after harvesting an old PCB)Currently they are being stored in a configurable fishing lure type box bought from DX (http://www.dealextreme.com/p/configurable-storage-toolboxes-3-pack-4727I love those things you can arrange them in different configurations).My question is, how safe is it to store it there, I realize that the risk is pretty high when storing components in a not suitable containers.But how high is high ?Will all the components will be dead, will I have to test each component after storage ?Dave can you do those electrostatic test on some storage boxes?Thanks.

author: Psi
author_rank: Super Contributor
timestamp: July 30, 2012, 10:20:23 am
content: In all likelihood you will never have a single components die from ESD.For hobby work ESD really isn't an issue worth worrying about.There are a few exceptions though, like ultra sensitive devices. (One that comes to mind is laser diodes, some of which are very sensitive)

author: cwalex
author_rank: Frequent Contributor
timestamp: July 30, 2012, 10:56:20 am
content: Quote from: Psi on July 30, 2012, 10:20:23 amWhat about mosfets? I always keep them in the antistatic bags and use a wrist strap with the because I worry that I could blow the gate insulating layer. Am I being paranoid?

author: Psi
author_rank: Super Contributor
timestamp: July 30, 2012, 11:13:28 am
content: Some mosfets are more protected than others, but yeah if you have antistatic bags you might as well use them.It also depends if you live in a country will very low humidly. If you're always getting static shocks off things then looking at ESD issues is probably a good idea.It's very rare for a hobbyist to destroy something through ESD and extremely common for stuff to blow up for other reasons

author: Christopher
author_rank: Frequent Contributor
timestamp: July 30, 2012, 11:20:18 am
content: It always makes me cry whenever i get a cheap grey market IC deal from china and they come pressed in foam. Not even anti-static foam.

author: Psi
author_rank: Super Contributor
timestamp: July 30, 2012, 11:30:24 am
content: Quote from: Christopher on July 30, 2012, 11:20:18 amhehe yeah,and yet.. they all seem to still work

author: cwalex
author_rank: Frequent Contributor
timestamp: July 30, 2012, 11:41:23 am
content: Quote from: Psi on July 30, 2012, 11:30:24 amexcept for the ones that just have a copper slug instead of a microcontroller diehttp://www.sparkfun.com/news/350
How do you embed videos in your postings? - Page 1
Forum section: electronics / general

author: JuiceKing
author_rank: Regular Contributor
timestamp: July 30, 2012, 04:10:26 am
content: Hi,Couldn't find the explanation in the on-line help, and none of the features I've tried seem to work. I get the text of a URL to a YouTube video, and not the video itself embedded. How do you do it?Thanks!- Ken

author: IanB
author_rank: Super Contributor
timestamp: July 30, 2012, 05:08:14 am
content: Just include the link to the video in your post, like this:Code:https://www.youtube.com/watch?v=ZVJ5uuvAlSoThe forum will automatically turn it into an embedded video.
need a favour palease - Page 1
Forum section: electronics / general

author: siliconmix
author_rank: Frequent Contributor
timestamp: July 30, 2012, 06:46:46 am
content: next time your on ebay could yo go to the seller "poptasion".could you where he says the items are being shipped from .i bought from him and on the seller form it stated uk address i find out now it's coming from hong kong .

author: PeterG
author_rank: Frequent Contributor
timestamp: July 30, 2012, 07:07:47 am
content: We have the same issue here in Australia. There is a group of sellers selling dodgy batteries and chargers. They can be identified by the 'Item Location' being listed as 'NT, Australia' they are all china based sellers.Regards

author: G7PSK
author_rank: Super Contributor
timestamp: July 30, 2012, 07:48:26 am
content: Some of the sellers are the other way around I just bought a meter that said it was coming from Hong Kong when it arrived 2 days later it had been Posted in London, and many times when I have puchased from ebay thinking it was from a UK seller it has turned out to be from Belgium,Germany or Channel Isle.

author: siliconmix
author_rank: Frequent Contributor
timestamp: July 30, 2012, 07:49:58 am
content: what would happen if say the buyer incured a import duty charge ?
Modifying chinese mains power meter - Page 1
Forum section: electronics / general

author: erupter
author_rank: Contributor
timestamp: July 28, 2012, 09:20:54 am
content: I bought a PowerBay SSM T8 mains power meter over ebayIt came with anaustralian standard plug.So I thought: since I want to meter my computer or other devices, and the wall sockets are in a position where reading the meter is difficult, what about putting an extension to it?My idea is to have a cable of 1.5m go from the meter to the plug/socket for the appliance.I suppose that this gets into transmission lines theory (which I always hated) so I'm asking: what kind of distortion I'm gonna get from such a setup?Ideally this thing would be calibrated for measuring at its own plug/socket, so installing an extension will surely modify what the thing reads. But by how much?

author: David_AVD
author_rank: Super Contributor
timestamp: July 28, 2012, 09:54:27 am
content: It shouldn't make any difference where in line the power meter goes. I think you're over thinking this.

author: Christopher
author_rank: Frequent Contributor
timestamp: July 28, 2012, 09:56:02 am
content: Try it with an extension lead.Obviously make sure the load is constant,

author: IanB
author_rank: Super Contributor
timestamp: July 28, 2012, 04:12:54 pm
content: Quote from: erupter on July 28, 2012, 09:20:54 amYou might be shocked to discover, if you looked behind the wall socket, that there is a really long cable extension running through the wall back to the distribution panel and meter cabinet. And before that there is a way long cable running all the way back to the utility transformer. Who knows what kind of distortion is going to happen over all that cabling?

author: saturation
author_rank: Super Contributor
timestamp: July 28, 2012, 05:04:15 pm
content: Transmission lines? Purely as an exercise, its moot when lenght < 1/10th the wavelength. At 60Hz that's about 500 km; at 50 Hz, 600 km. At those lengths you've probably have far more IR losses much sooner than reflection losses.

author: G7PSK
author_rank: Super Contributor
timestamp: July 29, 2012, 09:28:11 am
content: The watt meters sold for domestic use are so inaccurate that it would not make much difference if you wrapped the cable round the moon and back, if you use one and at the same time use a couple of DMM's to measure amps an voltage you will in all likely hood find a wide disparity.

author: saturation
author_rank: Super Contributor
timestamp: July 29, 2012, 12:19:56 pm
content: In the USA the killawatt has been tested by many independent state and local government bureaus. Its about 1% accurate overall, it claims 0.2%, and is even lent from government libraries for people to check out. I've tested it myself with a DMM on many types of loads. More discussion is in eevblog archives.http://www.cityofboston.gov/environmentalandenergy/conservation/kill-a-watt.aspQuote from: G7PSK on July 29, 2012, 09:28:11 am
Smallish, Waterproof Panel-Mount Switches - Page 1
Forum section: electronics / general

author: bullet308
author_rank: Frequent Contributor
timestamp: July 28, 2012, 05:56:08 pm
content: Hi:In a related question to my lithium battery ventilation one, I am looking for (and not particularly finding at Mouser et all) small (1/8" / 3mm diameter) waterproof (IP67/68 or equivalent) on/off switches. Anybody have a line on any that are less than a half-inch (13mm) in diameter, at least?TIA

author: Bloch
author_rank: Unknown
timestamp: July 28, 2012, 06:05:35 pm
content: If 19mm thenhttp://dk.farnell.com/schurter/1241-6621-1180000/switch-vr-msm19-6a-ip67/dp/2082873?in_merch=New%20Products&in_merch=Nye%20produkter&MER=i-9b10-00001144

author: bullet308
author_rank: Frequent Contributor
timestamp: July 28, 2012, 06:15:58 pm
content: The right concept, but a little too large. :-/About 6mm is as large as I can work with.

author: bullet308
author_rank: Frequent Contributor
timestamp: July 28, 2012, 10:25:40 pm
content: By way of update, I am having much better luck at Newark/Element 14 (US):http://www.newark.com/jsp/search/browse.jsp;jsessionid=B5ZLPH0RYSYHMCXDUZ1G3PQ?N=422+201316&Ntk=gensearch&Ntt=ip67&Ntx=mode+matchallpartial&displaytext=&hasOnlySelectedPGRefinement=false&getResults=true&_requestid=343796
How do you inline YouTube videos ? - Page 1
Forum section: electronics / general

author: Bloch
author_rank: Unknown
timestamp: July 28, 2012, 09:17:00 am
content: How do you inline YouTube videos on this forum ?

author: robrenz
author_rank: Super Contributor
timestamp: July 28, 2012, 10:21:16 am
content: Copy the full url of the video, hit the hyperlink button on the post reply toolbar, paste it, done.

author: Bloch
author_rank: Unknown
timestamp: July 28, 2012, 10:33:20 am
content: testhttp://youtu.be/eRtO3EZK_Cc

author: Bloch
author_rank: Unknown
timestamp: July 28, 2012, 10:36:15 am
content: Quote from: robrenz on July 28, 2012, 10:21:16 amThanks.My problem was that i did use the default "share" button on YouTube. And that is a short link.

author: IanB
author_rank: Super Contributor
timestamp: July 28, 2012, 04:19:44 pm
content: Quote from: robrenz on July 28, 2012, 10:21:16 amYou don't even have to do that. If you just paste the YouTube URL into a post it will get automatically converted to an inline video by the software. Which is a very annoying misfeature when you don't want it to do that (for example it will corrupt any modifiers you put on the link such as a start time).It is very useful to have the short URL workaround available to avoid the SMF software breaking your links when you don't want it to mess them up.
Why does this site update at different rates - Page 1
Forum section: electronics / general

author: brightspark
author_rank: Newbie
timestamp: July 24, 2012, 05:12:28 pm
content: So my laptop has Windows 7 and the EEVblog updates (shows new blogs as soon as they are uploaded)My desktop pc has WindowsXP and this does not show all of the uploaded content. At the moment my laptop Windows 7 is showing blog 320 but my desktop WindowsXP is only showing up to blog 318, also it does not show any old entry listings. This is also the same for my iphone 4 and blackberry.I only have this problem with the EEVblog all other sites that i view are the same on either system, can anyone tell me why this is please?

author: PA0PBZ
author_rank: Super Contributor
timestamp: July 24, 2012, 06:57:16 pm
content: Had me puzzled for some time, but apparently the home page (at the moment) shows 318 as the newest while the episode list has 321.Don't know why... Dave?

author: brightspark
author_rank: Newbie
timestamp: July 24, 2012, 07:12:49 pm
content: I don't even get the episode list using WindowsXP other than the latest 10 listed (no old ones)

author: EEVblog
author_rank: Unknown
timestamp: July 26, 2012, 01:53:26 am
content: There has been an issue with the cache plugin for wordpress. It no longer seems to work, and if turned on does not display the latest posts.I have been playing with this, so you may have cought the tiems it was turned on.It is now turned off permanently until I figure out what's wrong. So there should no longer be any problem.Dave.

author: PA0PBZ
author_rank: Super Contributor
timestamp: July 26, 2012, 11:28:15 am
content: No, it's still not OK.At the moment the home page shows #321 as the latest (Nexus teardown), and the episodes list shows #322.

author: brightspark
author_rank: Newbie
timestamp: July 26, 2012, 11:44:42 am
content: Same for me still only showing #321.But what is really annoying is that the "Blog links to every episode" is showing nothing just a blank background, and i really wanted to go through some of the old episodes.

author: PA0PBZ
author_rank: Super Contributor
timestamp: July 26, 2012, 12:40:39 pm
content: Quote from: brightspark on July 26, 2012, 11:44:42 amYou meanhttp://www.eevblog.com/episodes/?Works fine for me, in W7 (IE9,Chrome) and in XP (IE7,IE8).

author: brightspark
author_rank: Newbie
timestamp: July 26, 2012, 01:05:41 pm
content: Yes i get no listings using WindowsXP IE8 or Chrome and its the same with my iphone using Safari

author: EEVblog
author_rank: Unknown
timestamp: July 27, 2012, 02:57:32 am
content: I see nothing wrong on Firefox, Chrome, or Opera.I can only presume it's some cache outside of my server.Dave.
Duratool D00674  vacuum desoldering station any good? - Page 1
Forum section: electronics / general

author: mortos360
author_rank: Regular Contributor
timestamp: July 31, 2012, 09:56:33 am
content: I was looking for a soldering station anyway and after seeing the latest video from Mike, I thought why not buy a station with a vacuum desoldering gunQuestion is, is this station any good? Has anybody experience with this brand in genial?I found a video on youtube about another vacuum station from this brand, and it looks ok... at least for the price.

author: grumpydoc
author_rank: Super Contributor
timestamp: July 31, 2012, 12:08:13 pm
content: If you meanthis oneI bought one about a month ago as I'd acquired a couple of boxes of PCBs to strip for parts.It's certainly much better that a soldering iron plus desolder pump. I needed to swap a couple of conectors around on a Lecroy 'scope front panel and got both off the respective PCBs with almost no damage - I'd never have been able to do that with an iron+hand pump.That's not to say it's perfect - the construction is a bit flimsy and when I first got mine the vacum tube was pinched in the handle so I had to dismantle it to get it working.Also the solder does tend to stick to the spring inside which is supposed to collect it - this makes cleaning a little tricky. I use an iron to melt the solder.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: July 31, 2012, 12:11:28 pm
content: Any tool that has a heated hollow bit is miles better than a sucker for pth boards. Differences are minly in robustness and how often it needs de-gunking.

author: mortos360
author_rank: Regular Contributor
timestamp: July 31, 2012, 12:15:28 pm
content: I mean thishttp://at.farnell.com/jsp/search/productdetail.jsp?sku=1498363but its basically the same I think.Thanks for the feedback

author: SeanB
author_rank: Super Contributor
timestamp: July 31, 2012, 03:26:06 pm
content: Yes, I do miss the nice Weller DS701C I used to use, even if I had to clean the chamber every 100 holes, and the filters were glass fibre nicked from the sheet metal shop when they were not looking. About the only thing that could undo the 21 layer flexiboards without damaging too many of them.

author: Bored@Work
author_rank: Super Contributor
timestamp: July 31, 2012, 06:20:35 pm
content: It is a rebadged Zhongdihttp://www.china-zhongdi.com/zd-917.htmwhich is an older Zhongdi model. Opinions about Zhongdi quality varies. I thing they produce good enough quality for hobby work, but I wouldn't want one in a pro shop where it might run 24*7.
Schematics - Page 1
Forum section: electronics / general

author: Setar2k11
author_rank: Contributor
timestamp: July 27, 2012, 09:12:09 am
content: For anyone whos interested i have just come across this website,http://www.schematicsunlimited.com/, loads of schematics.

author: bradleytron
author_rank: Regular Contributor
timestamp: July 27, 2012, 01:39:45 pm
content: Thanks Setar2k11, this might prove helpful at some point....

author: 6502nop
author_rank: Regular Contributor
timestamp: July 27, 2012, 03:14:06 pm
content: For those paranoid intertube users like myself, in order to use the site, you'll have to do the following:1) Enable session cookies for the site.2) Allow pop-up windows for the site (no actual pop-up occurs, but it seems that the site uses a PHP script that mimics a pop-up, and gets blocked).All other adblockers and privacy add-ons seem to work, otherwise.Scroll through the names, pick your item, (pop-up) answer the captcha, and you're done.Some nitpicking:1) Load times can be reduced by sorting manufacturer names by first letter/#.2) Further sorting by category would be really nice (e.g., Audio, Computer, Automotive, etc.).3) The test PDF I D/L'd was a very poor scan of the schematic. Readable, but fuzzy. I would suspect that as time goes on, better scans will replace these.4) No uploading provision (yet!). I've got some docs that really should be scanned an U/L'd for posterity, as I'm sure most of us here do, too.5) Crappy E-Bay "slideshow" ads based on what you're searching for. Not particularly intrusive, and they've got to pay for it somehow. So, necessary evil, I guess...All in all, an excellent start!nop
How much wind(voltage) do you pass? - Page 1
Forum section: electronics / general

author: HardBoot
author_rank: Regular Contributor
timestamp: July 26, 2012, 08:07:35 am
content: Classic non-scientific test.Get your multimeter.Positive prove on 3v.Left thumb on common multimeter probe.Right finger on ground.I get 2.962v, but if I test my resistance and do the math, It's much different.If you're part of the circuit, you're messing up your readings, keep your fingers off the probe tips and circuitry, you're a resistor, capacitor, and noise source all in one.
Fluke 87V -- residual capacitance reading - Page 1
Forum section: electronics / general

author: kff
author_rank: Contributor
timestamp: July 27, 2012, 05:13:57 am
content: Hi all,A new member here.Had a quick question about my new Fluke 87V. When in capacitance measurement mode, my meter shows residual capacitance of 0.2nF with test leads removed (auto mode). That seems a bit high -- Extech 330 is only 0.03nF by comparison. If you have this meter, can you please let me know what numbers you see?Also -- I measure 0.20-0.25 Ohm test lead resistance. I thought this was pretty high, especially for the price. What resistance do you see with test leads connected together on your meter?Many thanks!

author: robrenz
author_rank: Super Contributor
timestamp: July 27, 2012, 10:08:00 am
content: IMO in both cases you need to use the REL button on your meter. That is what it is there for. In resistance mode you are eliminating the resistance of the test leads themselves. A $1500.00 bench meter does the same thing in 2 wire resistance mode. there is nothing wrong with your meter. In capacitance mode a set of very short leads (6") and REL will help immensely with small capacitance accuracy.

author: Baliszoft
author_rank: Frequent Contributor
timestamp: July 27, 2012, 01:00:28 pm
content: Just for reference, my u1252b reads 0.06ohms with the test leads connected together and 0.0nf with leads disconnected. 0.2 ohms is a bit on the high side in my opinion. Are your leads clean?

author: robrenz
author_rank: Super Contributor
timestamp: July 27, 2012, 01:06:09 pm
content: Lead resistance of standard fluke probes that come with the meter is .06 Ohms for the pair. So Balsizoft is correct, check your connections.

author: M. András
author_rank: Super Contributor
timestamp: July 27, 2012, 03:43:31 pm
content: my 289 reads 0.08x nF without leads, shorted togethers goes into overload strange it has 100mF rangethe leads are within 0.08-0.1ohms depends where i touch them together. it doest change much with the croc clips or without them