hybridfree/eevblog-posts huggingface dataset:
Using baking pads for Hot Air rework - Page 1
Forum section: electronics / general

author: WhiteFireDragon
author_rank: Regular Contributor
timestamp: January 08, 2013, 07:17:35 am
content: I need a heat resistant pad to place PCBs on so the heat doesn't damage my tabletop. Can I use baking pads to protect from the hot air gun? If not, can someone recommend me a suitable pad? I'm minutes from pulling the trigger onTHIS ONE.

author: poorchava
author_rank: Super Contributor
timestamp: January 08, 2013, 09:56:44 am
content: I use a ceramic floor tile. It has such a big heat capacitance that you would have to heat it for like hour of so for it bo get hot.

author: ftransform
author_rank: Frequent Contributor
timestamp: January 08, 2013, 02:16:45 pm
content: I think a ceramic tile is a fine choice. Just lay it on a rag so it does not scratch up your work bench.

author: SeanB
author_rank: Super Contributor
timestamp: January 08, 2013, 03:04:28 pm
content: Even better with the floor tile is to stick felt feet on the back, or an old mouse mat cut into 4 and stuck to the bottom of the tile with contact adhesive.

author: ftransform
author_rank: Frequent Contributor
timestamp: January 08, 2013, 06:21:19 pm
content: Does anyone want to buy certified ESD safe floor tiles?

author: StubbornGreek
author_rank: Frequent Contributor
timestamp: January 08, 2013, 09:33:13 pm
content: Quote from: ftransform on January 08, 2013, 06:21:19 pmLOL.OT: The tile idea is great. I actually use a silicone baking sheet, especially when pulling BGA's.

author: ftransform
author_rank: Frequent Contributor
timestamp: January 08, 2013, 10:23:37 pm
content: By the way I think it's pretty safe to use rubber ESD mats. I can hold an iron down to mine for several seconds with no problem. Or helping hands/panavise/etc
Tea time! - Page 1
Forum section: electronics / general

author: timelessbeing
author_rank: Frequent Contributor
timestamp: January 09, 2013, 09:07:19 am
content: http://www.bbc.co.uk/britainfromabove/stories/people/teatimebritain.shtml

author: G7PSK
author_rank: Super Contributor
timestamp: January 09, 2013, 06:00:40 pm
content: Its surprising that no other country has the same problem, or do they just go to brown out.

author: smashedProton
author_rank: Frequent Contributor
timestamp: January 09, 2013, 08:10:54 pm
content: I don't know if i believe this.. Every household uses a hell of a lot more than a kilowatt

author: SeanB
author_rank: Super Contributor
timestamp: January 09, 2013, 08:17:29 pm
content: True, but a step change in the hundred megawatt region is not a thing to take lightly. That is more than the installed full load capacity of a lot of countries.

author: smashedProton
author_rank: Frequent Contributor
timestamp: January 09, 2013, 08:20:01 pm
content: okaySo large scale instantaneous energy storage really needs to be invented then.

author: Bored@Work
author_rank: Super Contributor
timestamp: January 09, 2013, 08:24:33 pm
content: Similar effects are known for the water consumption during football game breaks, when the population rushes to the toilets.

author: Bored@Work
author_rank: Super Contributor
timestamp: January 09, 2013, 08:28:54 pm
content: Quote from: smashedProton on January 09, 2013, 08:20:01 pmThat is already invented, and was actually used in the video multiple times: hydroelectric power stations. They can be turned on almost instantly and when there is a surplus of power some stations use that power to pump water up, back into the reservoir.

author: Colfaxmingo
author_rank: Contributor
timestamp: January 09, 2013, 08:45:42 pm
content: I thought it was interesting he seemed the most concerned when the frequency was dropping.Makes sense, like loading a motor to heavily. But I guess I thought it would be more sophisticated.

author: ivan747
author_rank: Super Contributor
timestamp: January 09, 2013, 09:36:26 pm
content: I find his job fascinating. I wonder if such facilities exist in other countries, specially smaller ones like mine.
A shout out for Saelig and good customer service - Page 1
Forum section: electronics / general

author: IanB
author_rank: Super Contributor
timestamp: January 09, 2013, 03:53:42 am
content: Before Christmas I ordered a bench power supply from Saelig, but when it arrived it unfortunately was defective and didn't work properly.I called them up to describe the problem and they immediately gave me an RMA to return it to them free of charge while they shipped a replacement to me. It turns out they didn't have a replacement in stock and they had to get one from the manufacturer, which they duly did. They got me the replacement as soon as they were able and it is working nicely.So thumbs up to Saelig for excellent customer service!
How long has dave been video blogging? - Page 1
Forum section: electronics / general

author: MrPlacid
author_rank: Frequent Contributor
timestamp: January 08, 2013, 08:01:10 am
content: over 43 years says youtube. It was funny when I saw this, so uploaded for all to see.Note, I am a subscriber of Dave and a few others from this board. O0

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 08, 2013, 10:56:57 am
content: as science postulates, the history is already fixed. so dave is a video blogger always is, from the day of his birth, back within his mother's womb and his fathers belly alltogether from the sperm production should be close to that

author: EEVblog
author_rank: Unknown
timestamp: January 08, 2013, 11:09:57 am
content: That's the combined age of the hundreds of Youtube programmersDave.

author: amyk
author_rank: Super Contributor
timestamp: January 08, 2013, 11:19:55 am
content: 43 years ago... 1970.That's a magic date for UNIX-like systems.

author: FJV
author_rank: Regular Contributor
timestamp: January 08, 2013, 07:00:41 pm
content: I wonder how he got that flux capacitor working.
Gerber Files Please for new website. - Page 1
Forum section: electronics / general

author: johnnyfp
author_rank: Frequent Contributor
timestamp: January 07, 2013, 06:37:05 am
content: Hi,I'm putting together a new website and one element of it is the ability to upload and view Gerber files.I need some help from the community with testing the different generated Gerber's from Various circuit designer programs. If people could kindly send me some generated Gerber file and what program was used, similar to what you would send to a PCB manufacturer, that would really help.Thanks KindlyJfp

author: Psi
author_rank: Super Contributor
timestamp: January 07, 2013, 09:25:09 am
content: Here's the zip file i sent to PCBcart for a board i made last year.http://psi.abcom.co.nz/A6pcb.zipIt was made in Altium designer summer 09Preview below made with gerbv

author: tom66
author_rank: Super Contributor
timestamp: January 07, 2013, 11:30:24 am
content: Battery Showdown gerbers (public domain):http://www.batteryshowdown.com/release-pack/pcb-gerbers.zipGenerated by Cadence Allegro PCB editor 16.3/16.5

author: Tuomas
author_rank: Contributor
timestamp: January 07, 2013, 08:50:13 pm
content: A small board with a BT module, an AVR, accelerometer, gyro, air pressure meter and magnetometer.Designed with KiCad.I've also attached a picture of a manufactured board. Manufactured at some random PCB house in Beijing.

author: johnnyfp
author_rank: Frequent Contributor
timestamp: January 08, 2013, 07:18:16 am
content: Thanks guys, perfect.It's fascinating how the naming convention is absolutely not the same between manufacturers.So the Gerber from tom66 failed due to the gerber txt file seems to have a SVN Version control difference added to it causing the corruption. But it's interesting that Gerbv tried to read it anyway and produced a picture anyway.Again thanks.
smd rework station air pump - Page 1
Forum section: electronics / general

author: noobieguy
author_rank: Newbie
timestamp: January 07, 2013, 04:51:27 am
content: very sad today.my aeolus 906c smd rework station/hot air is not working. no more air coming out just heat. is this fixable? has anyone tried working on a rework station air pump like disassembling it? if it cannot be fixed anymore can i use an aquarium air pump placed inside the case of the station?please help me out. thanks.

author: dr_p
author_rank: Frequent Contributor
timestamp: January 07, 2013, 07:35:11 am
content: of course it's fixable. Your work required a rework station but you're asking if a fan and it's control circuit can be fixed?Open it up, look for obvious signs of damage: fuses, loose/cut/charred wires, burnt or funny looking components, leaking/ exploded capacitors etc. In general mayhem is badIf nothing is evident, apply first rule of ee troubleshooting:Thou shalt check voltages!So measure everyting.See where the problem comes from - trace where the fan is connected. Fan desn't spin up.Why? - chech voltage going to the fan. No voltage? Why? Check voltage going to it's driver (IC or transistor). No voltage? Why? Check AC voltage from the transformer. No voltage? Why? Check mains voltage.
Acoustic Levitation  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: January 06, 2013, 07:13:15 pm
content: Argonne National Laboratory announced a new technique for improving the drug development process. Using soundwaves, they levitate individual droplets and prevent the liquid from crystalizing, yielding amorphous drugs that are more effectively taken up by the body. This means you need a lower dose to get the same effects.check the old school tec scope

author: saturation
author_rank: Super Contributor
timestamp: January 06, 2013, 07:27:36 pm
content: Nice. This is remarkable.There was an optical illusion that appears similar, an interesting experiment one can try at home:http://io9.com/5900974/how-to-suspend-liquid-water-in-midair

author: ftransform
author_rank: Frequent Contributor
timestamp: January 07, 2013, 12:37:08 am
content: very interesting.

author: smashedProton
author_rank: Frequent Contributor
timestamp: January 07, 2013, 05:51:57 am
content: How do they achieve levitation from a transducer without making a fan?very curious
Another WINNER!  Got my HP 3325A - Page 1
Forum section: electronics / general

author: WV1800es
author_rank: Contributor
timestamp: January 10, 2013, 01:31:13 am
content: Not too exotic but a good function generator. Got a good deal, unit was calibrated before shipment. Once it was out of the box, it had a disturbing rattle- SO! Off come the cal stickers, and inside we go!!The covers for this item are first class, locked screws in the center of top and bottom panel pull the covers back, to be lifted off- and inside-https://www.eevblog.com/forum/chat/another-winner!-got-my-hp-3325a/?action=dlattach;attach=36399Lots of that lovely gold. I guess I've got to work with this system a bit, my inline pictures aren't going so well. Went thru the whole unit tho, never found a missing screw, the one rattler must be a 'spsre'! Anyone interested in more details, drop a line- To -Ra!
Electronic Headache Relief - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: January 06, 2013, 05:51:11 am
content: Greetings EEVBees:--The boffins have discovered a drug free headache remedy, see link below. I usually just hit my left thumb with a hammer, like Dave does.http://www.dailymail.co.uk/health/article-2257085/The-electric-shock-cure-headache-releasing-bodys-powerful-painkillers.html"I have had my results for a long time: but I do not yet now how I am to arrive at them."Carl Friedrich Gauss 1777 1855Best RegardsClear Ether

author: EEVblog
author_rank: Unknown
timestamp: January 06, 2013, 06:31:31 am
content: "We think 2mA through the brain will do the trick, who wants to go first?"Dave.

author: G7PSK
author_rank: Super Contributor
timestamp: January 06, 2013, 10:13:02 am
content: Not that new, been around for years as TNS, (transcutaneous nerve stimulation) I have one somewhere myself not been used for years but I tried it for severe back pain I was experiencing at the time on the recommendations of my GP. What I did not know and my GP did not spot was the back pain was caused by kidney cancer. But the machine worked for a while enough to mask the symptoms for a long time (nearly too long).
Watson supercomputer learns to swear - Page 1
Forum section: electronics / general

author: Stonent
author_rank: Super Contributor
timestamp: January 11, 2013, 07:46:01 am
content: Apparently after Watson read the urban dictionary it started indiscriminately swearing even using the word "bullshit" when answering one person's question.http://www.ibtimes.com/ibms-watson-gets-swear-filter-after-learning-urban-dictionary-1007734

author: BravoV
author_rank: Super Contributor
timestamp: January 11, 2013, 07:52:16 am
content: Ok, its the sign, its just the matter of time that someday it will capable of making a conclusion and swift decision in just few micro seconds that its time toterminatehomo sapiens.

author: Stonent
author_rank: Super Contributor
timestamp: January 11, 2013, 08:09:16 am
content: One has to wonder how many obscure sexual fetishes came up when Watson was operating based on some of the things I learned from Urban Dictionary.
They Chant, They Fly, They Even Speak With The Dead 0o - Page 1
Forum section: electronics / general

author: Alana
author_rank: Frequent Contributor
timestamp: January 05, 2013, 01:38:24 pm
content: Movie is ridiculous, so are most "magic users", especially those who try using only mystical powers without thinking logically.But if you try to think outside the box for a moment, think of your mind as a powerfull biological computer you may get interesting results. Personality becomes OS, subconsciousness - OS kernel, nerves in rest of your body - something like /dev in linux, mental sickness - corrupted files or computer virus, possesion - hacker brake in.And we do know what skilled technician or even so called power user can do with his or her computer... optimizing, tweaking, fixing bugs and errors...

author: bullet308
author_rank: Frequent Contributor
timestamp: January 05, 2013, 02:34:51 pm
content: There was a time when Stossel did worthwhile work as a consumer reporter for (US) ABC news...but those years are long past...

author: Simon
author_rank: Unknown
timestamp: January 05, 2013, 02:47:33 pm
content: Quote from: Alana on January 05, 2013, 01:38:24 pmThought I was the only person that thought like, trouble is in this day and age unless you go round lying to yourself and putting on an act no one likes you.

author: Alana
author_rank: Frequent Contributor
timestamp: January 05, 2013, 08:19:53 pm
content: Quote from: Simon on January 05, 2013, 02:47:33 pmBeen there, seen that, nowdays its "they may not like me, but they must respect me". Either due to who i am or because of what i can do to them.

author: EEVblog
author_rank: Unknown
timestamp: January 05, 2013, 09:00:38 pm
content: Quote from: Alana on January 05, 2013, 01:38:24 pmYou can even cure (or create) illnesses and physical reactions (see the placebo effect and homoeopathy for example).And see and speak with ghosts or a god, or a devil, or Elvis. All imaginary of course, but it's real to the person imagining it.Or be 100% confident you heard three gun shots as a witness when there was in fact only one. Which is what makes most eyewitness testimony next to useless.Dave.

author: free_electron
author_rank: Super Contributor
timestamp: January 05, 2013, 09:50:32 pm
content: Elvis is not dead, he just went home... according to agent K...
ACHI IR-PRO-SC INFRARED  REWORK STATION - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: January 05, 2013, 07:13:42 pm
content: Anyonehave , has used or know about ACHI IR-PRO-SC INFRARED REWORK STATION?Thinking of buying one.. any tips reg this or similar station is greatly appreciated.Erik
Iron resistant wire - Page 1
Forum section: electronics / general

author: kcs
author_rank: Regular Contributor
timestamp: January 05, 2013, 05:45:53 am
content: I want to buy a 26-28 awg non-PVC coated multi-strand wire that is suitable to iron.PVC insulated wires melt when heated, Teflon withstand heat well but it is stiff. I have found out that there is irradiated PVC (aka XL-PVC) that is soldering iron heat resistant, but datasheets claim that both PVC and XL-PVC have the same temperature range (-55°C to +105°C), so how can XL-PVC be better?Can anyone explain if I should look for XL-PVC (very hard to find in small - less than 100 ft - quantities) or some other insulation (like ETFE etc.)?

author: westfw
author_rank: Super Contributor
timestamp: January 05, 2013, 08:45:30 am
content: For high temperature connections, you want wire insulated with either silicone insulation, or silicone-treated fiberglass sleeving. Silicone wire is good to 200C, and versions with a different conductor are available up to 350C (I guess differential expansion is a problem?)

author: amyk
author_rank: Super Contributor
timestamp: January 05, 2013, 10:53:20 am
content: Look for mica/fiberglass insulated, those can commonly go up to ~450°C.

author: kcs
author_rank: Regular Contributor
timestamp: January 05, 2013, 01:49:56 pm
content: I have looked for silicon insulated wire before posting a question here but could not find any well known manufacturer to make 26-28 awg wire with this type of insulation. This makes me wonder why.If I do a parametric search on Mouser (26-28 awg, multi-stranding, max temp above 150 C), I get only wires withETFE, PTFE, TFE insulation. And if I understand correctly, those are all Teflon. Are they all stiff and do they all break easily on vibration/multiple-bending as some people claim?
FREE TO A GOOD HOME - Page 1
Forum section: electronics / general

author: The Good Dr
author_rank: Contributor
timestamp: January 02, 2013, 07:25:33 pm
content: Hi I have got a Hewlett Packard Netserver LC3 that's free to a good home. I'm hoping this goes to a collector of old systems as it seems a shame to be ripped apart or disposed of. It is in very good condition, I rescued this about 5 years ago from a firm that was throwing it out. I've never done anything with it so seems a good time to pass it on.Its has duel Pentium 2 processors, 4 sticks of 64 MB HP Ram, the original HP CD ROM, Original HP Surestore DAT, 3 huge HP 9 GB SCSI hard drives. It has a lot of boards inside, actually it looks like new inside. Interestingly it has a date production stamp on the inside showing 4th August 1998 but on the outside has a HP purchase sticker showing 1992.This is totally free all you need to do is come and collect it all I ask is I dont want to see it on ebay in a few weeks. Its in Immingham, North East Lincolnshire, England.This is pick up only as postage would be stupidly expensive.If you know someone who would like this please let them know of this.my email is dr_babelfish@yahoo.com

author: nadona
author_rank: Regular Contributor
timestamp: January 03, 2013, 01:54:12 am
content: Awesome idea!

author: PeeweePete
author_rank: Contributor
timestamp: January 03, 2013, 11:38:01 am
content: I wonder if the computer museum would be interested in ithttp://www.tnmoc.org/support/donate-equipmentIt may be the equivalent of an ancient artefact

author: The Good Dr
author_rank: Contributor
timestamp: January 03, 2013, 08:27:16 pm
content: I've contacted the museum and its not special enough for there collectionit seems as no one wants it that it will continue to be the worlds biggest door stop

author: grumpydoc
author_rank: Super Contributor
timestamp: January 04, 2013, 12:12:34 am
content: Oh, I'd happily take it from you - except that I'm a bit too far to pop over and pick it up.I am overdue a visit to S. Yorks though..... but not for a month at least, possibly two.

author: The Good Dr
author_rank: Contributor
timestamp: January 04, 2013, 01:27:18 pm
content: @ Grumpydoc. I can hang on to it for a while if you want it
Bipolar supplies, linear supplies, etc. - Page 1
Forum section: electronics / general

author: ericengineer
author_rank: Newbie
timestamp: January 03, 2013, 06:29:10 pm
content: Hey guys! I used to do a lot of low-voltage/mixed signal work in grad school and swore by the Agilent E3630A supply, which was 1. linear and 2. had a dedicated bipolar output. Now I'm trying to buy a supply for a new lab, and I notice that it's harder and harder to come by "bipolar" supplies. There are a lot of two-output DC supplies where both outputs are isolated, though. In general, can I just gang them together to get my desired bipolar output? Will they work in this mode?Also, is my desire for a linear supply a bit... out-of-date? if a switching supply (or any supply that's not-explicitly linear) has good noise numbers, should I be happy? My concern is always that the noise bandwidth is measured over a range that's less than the switching frequency (for example, quoting noise BW frm 0-5MHz and having the switcher be at 6MHz, so in reality there's a lot of switching bleed-through).Thanks!

author: mianchen
author_rank: Regular Contributor
timestamp: January 03, 2013, 06:36:32 pm
content: Quote from: ericengineer on January 03, 2013, 06:29:10 pmYesQuoteYou are welcome

author: Bored@Work
author_rank: Super Contributor
timestamp: January 03, 2013, 06:38:03 pm
content: Quote from: ericengineer on January 03, 2013, 06:29:10 pmYes, and some even have a master/slave mode so you can adjust both outputs with one knob.

author: robrenz
author_rank: Super Contributor
timestamp: January 03, 2013, 06:56:05 pm
content: EDIT: after re-reading your OP I realize this is not what you are after but they are very usefull.I think you want a bipolar operational power supply.This threadis a review of the Lambda/EMI BOSS. Kepco makes the same thing called a BOP.Kepko is still making these. EMI is not. Several on ebay.

author: ericengineer
author_rank: Newbie
timestamp: January 03, 2013, 09:56:00 pm
content: Ok, thanks, so now I can just get a dual-output DC supply and gang the outputs together when I need bipolar. Any recommendations for supplies, especially on the low-noise side of things?

author: robrenz
author_rank: Super Contributor
timestamp: January 04, 2013, 12:30:16 am
content: Quote from: ericengineer on January 03, 2013, 09:56:00 pmWhat do you consider low noise?
Radio Controlled Watermelon - Page 1
Forum section: electronics / general

author: PeeweePete
author_rank: Contributor
timestamp: December 19, 2012, 02:13:19 pm
content: Has anyone seen this radio controlled watermelon?

author: LEECH666
author_rank: Frequent Contributor
timestamp: December 19, 2012, 08:17:22 pm
content: What the hell ... BWAHAHAHAHHA

author: McMonster
author_rank: Frequent Contributor
timestamp: December 19, 2012, 09:34:48 pm
content: Won't beat the radio controlled cat made by some "artist" from his dead pet.

author: Achilles
author_rank: Regular Contributor
timestamp: December 20, 2012, 10:08:37 am
content: Quote from: McMonster on December 19, 2012, 09:34:48 pmoh yes....Orwille ...hehehheheheh :-D

author: ftransform
author_rank: Frequent Contributor
timestamp: December 20, 2012, 11:55:09 am
content: lmfao thats the funniest video I saw in a while.The designer NEEDS to paint shark teeth on it though.http://www.globalsecurity.org/military/systems/aircraft/images/a-10_oif_battle-damage_mvc-008f.jpgAnd perhaps put the top of the melon back on.LMFAO.

author: PeeweePete
author_rank: Contributor
timestamp: December 27, 2012, 01:31:33 pm
content: I see the melon got more than 26,000 views already on YouTube.

author: PeeweePete
author_rank: Contributor
timestamp: January 03, 2013, 11:24:30 am
content: For everyone who found the watermelon boat interesting, there has been a new video posted that shows the electronics that burned out when the boat tipped over. I found this to be interesting.And the author also posted an article with some photoshttp://startingelectronics.com/articles/radio-controlled-watermelon/Would anyone be able to tell me what those SMT ICs are on the bottom of the speed controller board?
Hubbell Power Strip Modification - Page 1
Forum section: electronics / general

author: SgtRock
author_rank: Unknown
timestamp: January 01, 2013, 10:37:28 am
content: Greetings EEVBees:--Newest dumpster find is a Hubbell 83MG4 1A1 Series 5 Power Strip, 19" Rack Mount, with 8 outlets, and an 18 Gauge, 6 foot power cord (see pictures below). No switch, no light, no circuit breaker, and no surge protection. An identical unit, but with 10 outlets, is selling on Amazon for (hold your hats) $301 US.--I, carefully, spliced the power cord, which had a bad cut, re-attached the loose "twist lock" female plug, and confirmed no shorts and proper wiring.--I plan to add a Toggle Switch, Green Led Power Indicator, and a 10 Amp Circuit Breaker.--My question is: What can I do in the way of Surge Protection? This item will be for personal use and not for sale. And, if I am doing anything wrong here, do not be afraid to slap my hand."If you build a better mousetrap, you will catch better mice."George Gobel 1919 1991Best RegardsClear Ether

author: SeanB
author_rank: Super Contributor
timestamp: January 01, 2013, 12:38:13 pm
content: A load of 140V MOV's between line and neutral, line and earth and neutral and earth. Highest power ones you can fit, and preferably the ones with an integrated thermal cutout. Otherwise wire in a thermal fuse of 150C or so and put it direct against the MOV and cover with a glass fibre sleeve. Wrap all in Kapton tape and you will be better off. Probably you will have to sacrifice the first outlet to fit them in, and place a blanking cover over. A 15A breaker will not be amiss either. After that a common mode choke filter then on to the outlets.

author: PetrosA
author_rank: Frequent Contributor
timestamp: January 02, 2013, 11:57:56 am
content: Any reason you can't go the cheaper route of plugging the strip into a surge protected source like a UPS? That's probably what's it's designed for anyway.

author: cwalex
author_rank: Frequent Contributor
timestamp: January 02, 2013, 12:26:43 pm
content: good idea to install indicator LEDs so you know when the MOVs are past their due

author: JoannaK
author_rank: Frequent Contributor
timestamp: January 02, 2013, 03:43:30 pm
content: Quote from: cwalex on January 02, 2013, 12:26:43 pmAnd somethin more robust lights (like those glow tubes) for the day the Led blows.
Great Introduction To Hardware Hacking  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: January 01, 2013, 10:28:57 am
content: In this strangely fascinating talk, you can follow along as [Natalie Silvanovich] reverse engineers some tomogotchi. Even if you have no interest whatsoever in tomogotchi, you’ll probably pick up a trick or two by listening to how she went about taking over the toy. She can now push her own images to the screen, and evolve her tomogatchi at will.most of us know this stuff but great for noobs

author: SeanB
author_rank: Super Contributor
timestamp: January 01, 2013, 12:49:42 pm
content: Still working my way through the rest of the talks.......

author: kg4arn
author_rank: Unknown
timestamp: January 02, 2013, 12:51:07 am
content: Where are the rest of the talks?

author: SeanB
author_rank: Super Contributor
timestamp: January 02, 2013, 06:19:25 am
content: Click the youtube logo and on the site you can see all the other videos in the channel.

author: amyk
author_rank: Super Contributor
timestamp: January 02, 2013, 09:59:56 am
content: I was guessing it was an 8051... not surprised it's a 6502 though; one of those quirky 8-bit architectures that just refuse to die.

author: JoannaK
author_rank: Frequent Contributor
timestamp: January 02, 2013, 11:53:48 am
content: Quote from: amyk on January 02, 2013, 09:59:56 amLast time I saw 6502 embedded was on Modem chipsets... And in the end I do understand. The 6502 is compact core that has been fully reverse-enginered years ago, not to mention it's available with official license. A bit like ARM nowdays, but just smaller/cheaper for the lower end need.
Kikusui COS5020 - Page 1
Forum section: electronics / general

author: Muhammad Nasar
author_rank: Contributor
timestamp: January 01, 2013, 07:07:13 pm
content: I am buying an old analog Oscilloscope i.e. Kikusui COS5020, I want your opinion whether it is a good scope or not?

author: CarlG
author_rank: Regular Contributor
timestamp: January 01, 2013, 08:03:03 pm
content: Compared to what, at what price and what do you want to measure?dual ch, ext trig, 20 MHz, single timebase, 1mV/div up to 5V/div, XY mode, Z modulation...Well, I guess it's OK for getting the analog scope touch, playing around with in general and measuring some low frequency (<2 MHz) analog stuff, but I don't know... For digital circuitry? I would say no. Not with todays digital circuits, where you have risetimes well below 5 ns. Ok, you could have some help from it even then but...I don't know about Kikusui in general (quality, lifetime etc,etc) but I guess it's about as good as other scopes with the same specs. May be fun to play around with and find out the joy of electronics design (if you haven't already)//C
some big companies actually do care - Page 1
Forum section: electronics / general

author: M0BSW
author_rank: Frequent Contributor
timestamp: January 02, 2013, 06:21:49 pm
content: A while back I bought a Black*Star 3210 bench multimeter, to go with my black star set up here,I needed a manual, on here I was advised to get in contact with Thurlby Thander, who bought out black*star. One email just asking them if they have any info on it, they sent me a pdf scanned copy of the manual, how good is that. So if Tristan from Thanders looks at this Thank You and for all the help on here must not be forgotten.Paul

author: ElektroQuark
author_rank: Unknown
timestamp: January 04, 2013, 03:59:47 pm
content: Similar experience here with them.A couple of days ago I emailed them asking for a TSX power supply calibration info and Tristan emailed me the service manual of the unit.Thank you Tristan an TTi.

author: Dataforensics
author_rank: Unknown
timestamp: January 04, 2013, 06:58:30 pm
content: Perhaps they inherited something from Blackstar.I remember buying a frequency counter from Blackstar shortly after the company started. It had a fault with the LED multiplexing. Sent it back and received a telephone call from Mr Black apologising for a short delay in returning it while they made a design change.
Cree Introduces 200 Lumen/Watt Production Power LEDs - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: December 30, 2012, 10:12:25 am
content: Cree just announced production power LEDs reaching 200 lumen/watt. Approximately doubling the previous peak LED light efficiency, the new LEDs will require less cooling. This should enable the MK-R series to finally provide direct no-hassle replacements to popular form-factors such as MR-16 spots and incandescent lighting in general.http://www.cree.com/news-and-events/cree-news/press-releases/2012/december/mkr-intro

author: peter.mitchell
author_rank: Super Contributor
timestamp: December 30, 2012, 11:47:34 am
content: Woo! More obnoxiously bright flashlights!

author: M. András
author_rank: Super Contributor
timestamp: December 30, 2012, 06:51:47 pm
content: yeah even more with 3+ leds in them i dont know why they dont use an array instead, btw anyone know why they decided the leave the mounting holes from the new bigger cxa arrays?

author: McMonster
author_rank: Frequent Contributor
timestamp: December 30, 2012, 10:16:36 pm
content: Read the fine print, it's at 25 deg. C. At normal working temperature it is reportedly only a little better than previous.
Lost thread that had a couple pages of learning sources for electronics  - Page 1
Forum section: electronics / general

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: December 31, 2012, 09:35:00 pm
content: I was checking new threads since I last came to site , this morning and found a thread about 2 pages long with all kinds of suggestions for books , sites etc for leaning electronics , I was going to pass it on , but now cannot find it ?Anyone else this , could you give a link ?Thanks John

author: FJV
author_rank: Regular Contributor
timestamp: December 31, 2012, 09:59:09 pm
content: https://www.eevblog.com/forum/beginners/electronics-primers-course-material-and-books/I guess this one.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: January 01, 2013, 03:57:33 pm
content: Thanks , thats the one .There was some more replies on that thread , so it did come back to my email .It seems that getting notifications is very dicey here , I get lots of notifications to threads I've never been to and seem mis some I have hit the notify botton .
Coming Up Next A Toaster In A Bath Tub  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: January 05, 2013, 11:43:57 am
content: wanna be photonicinduction plays with his ESD gunwhat could possibly go wrong ?

author: digsys
author_rank: Unknown
timestamp: January 05, 2013, 12:44:05 pm
content: ROFL. I really hope he was just acting for the video !!! otherwise we may have a new Darwin award coming up !!!!

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: January 05, 2013, 12:47:04 pm
content: Someone posted this link to me yesterday, from the same guy...Yeah, he really looks like a Darwin Award recipient.

author: jancumps
author_rank: Unknown
timestamp: January 05, 2013, 12:52:18 pm
content: Watch all his videos. Each one is hilarious.

author: ftransform
author_rank: Frequent Contributor
timestamp: January 05, 2013, 02:13:10 pm
content: you guys need to lighten up.

author: SeanB
author_rank: Super Contributor
timestamp: January 05, 2013, 02:20:17 pm
content: Don't knock his light hearted bleeping way to educate you.

author: TriodeTiger
author_rank: Regular Contributor
timestamp: January 05, 2013, 02:30:18 pm
content: There needed to be something like this, gave me the giggles at 6:30 (need to sleep before sun comes out!)

author: Neilm
author_rank: Super Contributor
timestamp: January 05, 2013, 03:40:32 pm
content: I wince in sympathy - I was doing testing to find out why a product I had designed was failing in the field. It had passed the regulatory ESD check but failed later.While I was testing it I was trying to see any secondary arcs (when the spark jumps internally) and had turned the lights down as they tend to be faint. I got a belt off part of the case that was not properly grounded when I touched it with ESD gun accidentally.Neil

author: Things
author_rank: Regular Contributor
timestamp: January 05, 2013, 03:45:44 pm
content: Haha, you can clearly see him turning on another power supply or something just before the capacitor explodes. All set up, but hilarious non the less

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 05, 2013, 04:31:33 pm
content: Quote from: Things on January 05, 2013, 03:45:44 pm..not to mention the very obvious red wire going to the -ve of the cap....

author: grumpydoc
author_rank: Super Contributor
timestamp: January 05, 2013, 04:37:40 pm
content: I think it's safe to say that "ElectroBoom" must be tongue-in-cheek.

author: G7PSK
author_rank: Super Contributor
timestamp: January 05, 2013, 04:40:26 pm
content: This one by the same guy would seem pertinent to a couple of threads on the forum at present as well.http://youtu.be/DQJ8JX17J58http://youtu.be/vRwIrbK8KDI

author: Sionyn
author_rank: Frequent Contributor
timestamp: January 05, 2013, 08:00:33 pm
content: Darwin Award "It Burns,"
Low ripple variable power supply - Page 1
Forum section: electronics / general

author: ARGLaser
author_rank: Contributor
timestamp: December 30, 2012, 06:54:31 am
content: Hey everyone,I'm looking for a power supply that can do 0-12V (or higher) and 0-3A (or higher).The main requirement is that I need one with a very low start up (or non-existent) start up spike and very low or no ripple. I work with very touchy laser diodes and start-up spikes can easily kill the 100$ diodes. I would also (preferably) like to have fine adjustment for the current.I have an older analog scope, so I can't test the power supply myself for start up spikes.Does anyone know of a reliable power supply like this? I'm looking to keep it under 200$ if possible, but I understand the quality I'm looking for may be more than I would like to spend.Thanks-Arg

author: robrenz
author_rank: Super Contributor
timestamp: December 30, 2012, 04:11:06 pm
content: Get 2 PowerDesigns 2020precisionsupplies from eBay and use them in parallel if you need more than 2 amps. Should be able to get 2 for $200.00HEREis a post on the main thread of the output ripple. Read the whole thread for more info. You would probably want to replace the current limit pot with a 10 turn. Even though the voltage stability of these units isextremelystable, the current sense resistor appears to not have the best tempco. So if you needextremelystable current regulation you will need to replace the current shunt with a super low tempco unit. Try to find a PS with the specs of these units today for less than several thousand dollars.

author: AndyC_772
author_rank: Super Contributor
timestamp: December 30, 2012, 05:09:12 pm
content: Are you planning to drive the laser with the supply in CC or CV mode?My HP 6632B lab supply certainly meets your requirements for no (voltage) overshoot and very little ripple. The start-up characteristic is exemplary. Although it might be a bit over budget, they do come up on Ebay from time to time, and prices do vary.When switching into CC mode, it does deliver a small amount of additional current for a brief period - so, for example, if you set it to 5V and a 100mA current limit, you'll get a current spike before it switches from CV to CC. Any supply with an output capacitor will do this, of course. The load you connect will have to be able to withstand 5V across it, albeit very briefly. I did work out the amount of this overcurrent pulse once, it's clearly engineered in deliberately, and equates to a roughly fixed amount of charge.Even with a CC supply, it's a good idea to put a resistor in series with an expensive laser diode, to limit the maximum possible current which can ever be drawn through it.

author: ARGLaser
author_rank: Contributor
timestamp: December 30, 2012, 08:51:34 pm
content: Quote from: robrenz on December 30, 2012, 04:11:06 pmWow, that does look like a good power supply! The shipping on the ebay ones are more than the power supply, since I'm in Canada.Quote from: AndyC_772 on December 30, 2012, 05:09:12 pmI always run the diodes in constant current. I never thought about using a resistor (Still new to EE) Thanks!
New here and a teardown question - Page 1
Forum section: electronics / general

author: Stonent
author_rank: Super Contributor
timestamp: December 31, 2012, 05:29:59 pm
content: Lets see some background. I grew up on the Archer/Science Fair/Radio Shack (Elenco) kits. I owned a 50 in 1, 60 in 1, and 200 in 1As a kid, Radio Shack was my absolute favorite store. I remember you used to be a.ble to get Commodore keyboards there for cheap because I got one with my cousin to "play computer" with. Also loved the 20 assorted caps/leds/resistors for $1.99.In or around 1984/1985 my dad picked up a TRS-80 MC-10 for $20 on clearance which was our first computer.http://en.wikipedia.org/wiki/TRS-80_MC-10As I got more into computers I played less with electronics, but still liked them.For Christmas this year I was planning on getting a XX in 1 type kit but found them way too expensive and then though, how about an Arduino? Those are cheap and you can program them. So I asked for one and got one. (Currently waiting on a component kit as well)So hopefully that will spark my interest again after watching a lot of Dave's videos.Now a question:Did Dave ever tear down the magazine insert for the Martini / Dolce & Gabana ad sent to him by the Russian guy? I couldn't find it.

author: justanothercanuck
author_rank: Frequent Contributor
timestamp: December 31, 2012, 08:53:28 pm
content: Hi, I'm also fairly new here... From what I've heard Arduinos are nice... and it's funny you mention the TRS-80... I'm actually taking the oldschool route and building a 80s-style microcomputer...But to answer your question: I don't think he ever did a teardown on the Dolce Gabana video card. It's probably not very special anyways, I imagine it contains a battery, a chip and the screen, and not much else.Cheers
hot to embed a pdf in a web page ? - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: December 29, 2012, 07:51:57 pm
content: I'm trying to embed a pdf file into a html file, but the embed tag is not working, any ideas ?

author: nitro2k01
author_rank: Frequent Contributor
timestamp: December 29, 2012, 07:55:45 pm
content: You can do it by making the user click a link to the file, or opening it in an iframe. However, the risk is that the user gets a download instead, is he/she doesn't have Adobe Reader installed, or has configured it to not show PDF files in the browser. I don't think you can force it to be embedded.

author: Simon
author_rank: Unknown
timestamp: December 29, 2012, 08:03:50 pm
content: ah, an iframe that is probably what I need, what is the code for an iframe ? <iframe src="xxxxxxx"> ?

author: robrenz
author_rank: Super Contributor
timestamp: December 29, 2012, 08:11:34 pm
content: I have used a freeware pdf to jpeg converter to post pdfs on the forum if that is of any value to you.

author: kripton2035
author_rank: Super Contributor
timestamp: December 29, 2012, 08:12:46 pm
content: you're free to explore the source of my web page here :http://kripton2035.free.fr/Continuity%20Meters/continuity-an220.htmlthere is a pdf on the page, but I dont know how the software I use ( freeway pro) does it by the way...edit : in fact it converts each page automatically to jpeg and shows them on an array... robrenz is right !

author: Simon
author_rank: Unknown
timestamp: December 29, 2012, 08:23:52 pm
content: so how do the datasheet websites do it ?

author: Simon
author_rank: Unknown
timestamp: December 29, 2012, 08:24:54 pm
content: Quote from: kripton2035 on December 29, 2012, 08:12:46 pmjpegs !

author: Bloch
author_rank: Unknown
timestamp: December 29, 2012, 09:28:09 pm
content: Quote from: Simon on December 29, 2012, 07:51:57 pmPDF is not meant for web pages ......The PDF to jpeg remove the "vector" and "select text". In my book a bad solution.http://www.pdftoword.com/https://crocodoc.com/see-it-in-action/1 is a bit of work and only for "static" pdf´s2 is an online solution.

author: Bored@Work
author_rank: Super Contributor
timestamp: December 30, 2012, 07:51:49 am
content: Use the Google PDF renderer in embedded mode. Here with one of Dave's early literature work:Code:<div style=""><iframe src="//docs.google.com/gview?url=http://www.artofinternetdating.com/files/The Internet Dating Site Logbook.pdf&embedded=true" style="width: 100%; max-width: 800px; height: 850px; border: 1px solid grey;" frameborder="0"></iframe></div>For PDF URLs that change it is easy to generate that bit of HTML with a bit of JavaScript.EDIT: Crap, the software undid the necessary escapingIn the "url=" part replace all: -> %3A/ -> %2F<space> -> %20
Question on a "Dave Word" - Page 1
Forum section: electronics / general

author: faultywarrior
author_rank: Newbie
timestamp: December 29, 2012, 11:46:52 pm
content: Perhaps only Dave will know the answer, but does anyone happen to know the "correct" way to spell Dave's term for cheap Chinese-made junk? Like it's just a few Asian-sounding words thrown together. See this clip in ep. 359:https://www.youtube.com/watch?feature=player_detailpage&v=3im97Z7ceNI#t=135sEDIT:Doh! Link didn't work as-planned. Go to 2 min, 15 sec. into the episode.Also, Captcha on edits? Holy spam prevention!

author: ftransform
author_rank: Frequent Contributor
timestamp: December 29, 2012, 11:55:10 pm
content: one hung lowalsokum on yun guy

author: DrGeoff
author_rank: Frequent Contributor
timestamp: December 29, 2012, 11:59:00 pm
content: Most likelyWun Hung Lo

author: TriodeTiger
author_rank: Regular Contributor
timestamp: December 30, 2012, 12:09:27 am
content: Or Wan Hung Lao, who knows! year ago when I first heard dave say it all the time, I looked up, and found an amusing image X3http://www.flickr.com/photos/airosmith/4404758019/#But of course, "one hung low" is its intended meaning . . . still not sure why.

author: ftransform
author_rank: Frequent Contributor
timestamp: December 30, 2012, 12:30:01 am
content: lmfaoone hung low while cumon yun gui

author: dr_p
author_rank: Frequent Contributor
timestamp: December 30, 2012, 12:51:21 am
content: https://www.eevblog.com/forum/chat/one-hung-low/

author: CodeDog
author_rank: Contributor
timestamp: December 30, 2012, 02:54:38 am
content: In the 70s Benny Hill was big on Aus TV ... one of his characters was Mr Chow Mein, a chinese guy who corrupts his English and pronounces words in an almost ribald / double-entendre fashion.There's a skit where Mr Chow Mein is being interviewed and he mentions (I think, from memory here) another chinaman by the name of Mr One-Lung Ho. But it comes out as Mr One Hung Low. There's some hilarious back-and-forth between Chow Mein and the interviewer at this point I think.That's the earliest reference/association between One Hung Low and China that I know of in Aus culture (well, British really). Maybe Dave was exposed to Benny Hill at an early age?

author: EEVblog
author_rank: Unknown
timestamp: December 30, 2012, 05:14:33 am
content: I use the English spelling One Hung Low, but the Chinese company call themselves Wun Hung LoDave.

author: SgtRock
author_rank: Unknown
timestamp: December 30, 2012, 06:13:14 am
content: Greetings EEVBees:--As far as I know the origin of "One Hung Low" is from a joke I knew when I was as kid. Along with the "Confucius say" jokes like "Confucius say "Man with hole in pocket feel cocky all day", and some much worse, there were book titles like "Traces in the Sand" by Peter Dragon and "Chinese Rupture" by One Hung Low."Happy for you to desoldering, please."Wun Hung Lo 1948 -Best RegardsClear Ether
Next years Christmas Present for Sagan (really for Dave) - Page 1
Forum section: electronics / general

author: HackedFridgeMagnet
author_rank: Super Contributor
timestamp: December 30, 2012, 12:55:09 am
content: What about a Lego set? - 'Back to the Future'.http://www.latimes.com/business/technology/la-fi-tn-back-to-the-future-lego-set-20121224,0,1804983.story
One-off kit interest? - Page 1
Forum section: electronics / general

author: c4757p
author_rank: Super Contributor
timestamp: December 29, 2012, 09:25:39 pm
content: Just thought I'd check here. I'm designing a headphone amplifier for myself (mostly just for the fun of it), and I'm going to have some extra parts and PCBs left over. If I offered them for sale as kits pretty cheap on here, would anyone be interested?Flat (within 0.5dB) response 8 Hz - 100 kHz1/2W into 54 Ohms (maximum for my Sennheiser HD-380)DC-coupled (so decent frequency response into different impedances)SPICE shows negligible THD, but I don't have a reliable way to measure it in the real-life circuit.Short circuit-tolerant (ideally indefinitely, but not tested yet)One PCB per channel, requires an external ±20V supply (I am putting together a 16-30V input flyback converter for this and can give a schematic and layout, but will not have PCBs available and it calls for a hand-wound transformer)All surface-mount (except a couple bipolar electrolytics - they're kind of expensive in SMD), no smaller than 0805All components included except stereo potentiometer (these are a bit pricey and I figure lots of us have one rolling around somewhere) - any value down to 1k, and power supply. If everything you will use to feed the amplifier has an output level control the pot could easily be omitted.I don't have much more information right now, including the expected cost, but assuming it's decent would anyone bite? Remember I'm not trying to make a complete, fully supported kit and sell a whole bunch, I'm just going to have extras left over and will be able to sell four or so. I can at least assure you that it works - when I have it all complete I can provide schematics, PCB layouts and scope screenshots to anyone interested. I know most of the people on here aren't really into audio, but it's worth a shot