hybridfree/eevblog-posts huggingface dataset:
Working with miniature cameras - Page 1
Forum section: electronics / general

author: SgtTech
author_rank: Contributor
timestamp: April 19, 2018, 10:29:36 am
content: Hi Dave another idea for a thread or topic for the blog.What about looking at applications for miniature cameras? I have been looking at some wildlife cameras recently the ones that trigger when something walks by and i wondered what goes into the electronics of these things is it something you could develop yourself? Another area is that cameras are getting added to drones for a variety or reasons!! so making them light, low power consumption, linking to transmission using wifi or blue tooth, all of these are rich and interesting topics.I saw this recently Eragon™ 820: EIC-Q820-200 when looking for a suitable development kit to play about with cameras but its a bit on the expensive side for a hobbyist like myself. I have had a play with the Raspberry Pi cam but not got much further than that.Loads of camera modules are available on sites like Alibaba but how do you know what you are looking at what do the specs mean on these miniature devices what chips a Digital Signal Processing is required to get an experimental rig up and running.It would be good to see a few breadboard inventing type blogs from you.Ian
SMF Reply configuration - Page 1
Forum section: electronics / general

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 13, 2017, 09:45:48 pm
content: Quote from: Audioguru on November 13, 2017, 07:28:09 pmYes, that is one of the unfortunate things about this forum.Dunno whether is is a fundamental design of SMF, or just how this forum is configured?In either case, pretty annoying.I have to open a second copy of the thread so that I can see the graphics in the previous posts while replying.

author: tautech
author_rank: Super Contributor
timestamp: June 05, 2018, 09:23:16 am
content: Just spotted what might help you Richard.At the right hand foot of a thread is Quick Reply that just opens a text box and leave the thread as per normal view.There's none of the normal posting/formatting tools available, just this plain box.Just used it. :-)
Post text disappears after attachment error? - Page 1
Forum section: electronics / general

author: KhronX
author_rank: Frequent Contributor
timestamp: April 07, 2018, 02:38:24 pm
content: With due apologies in case this is the incorrect (sub)forum to post this in, but it seemed like the closest match for thisSo i typed up what fortunately was only a 3-4 sentence post just a few mins ago, and attached a photo to it. After clicking the Post button, i got an error saying it was too large, and should be 2000KB max - fair enough.I click "Back" aaaaaand... i'm greeted with a blank text boxFine... Type up roughly the same text, resize the photo, reattach. Error screen again, should be 1000KB max.Fair enough, retype the text, resize photo yet again, notice the text saying "2000KB max total attachments, 1000KB per file". Third time's a charm, and then it got through.Any way the forum could be made toNOTdelete / forget the text in case it needs to spit out the attachment size error?I'll note that on the second attempt, instead of clicking the "Back" link at the bottom of the error message, i went with the "Back" button in my browser, in the hope that it would take me back to the previous screen where i was typing the message. But nope, it took me back to the thread i was going to reply to, so that was a no-go.
Debunk / Teardown suggestion: R2 Battery Saver - Page 1
Forum section: electronics / general

author: smile
author_rank: Regular Contributor
timestamp: March 24, 2018, 09:31:30 pm
content: Well I wonder why the video shows no degradation of the plates with pulse charging at all. I mean are they that stupid. A lie is good when you believe it not the other way around. That said, maybe it worksThe interesting part is that it's microprocessor controlled, advanced etc. etc. I wonder what would be revealed here.
Microchip's ICD4 Review - Page 1
Forum section: electronics / general

author: tarun172
author_rank: Regular Contributor
timestamp: March 21, 2018, 09:26:06 pm
content: Review Microchip's latest ICD4 Programmer. See link here:http://www.microchip.com/Developmenttools/ProductDetails.aspx?PartNO=DV164045Tarun S
vr headset teardown - Page 1
Forum section: electronics / general

author: aqarwaen
author_rank: Regular Contributor
timestamp: December 26, 2017, 10:34:10 pm
content: could dave teardown some vr headsets?there are tons cheap ones,would be cool to see one nice teardown video.

author: SirAlucard
author_rank: Regular Contributor
timestamp: March 15, 2018, 02:52:40 am
content: I dunno what cheap ones your talking about, however the cheap ones I can think of are just shells. You place your phone inside of it, and there are two lenses to help your eyes focus to your cell phone. There really isn't much to them.
SUPERCAPS - Page 1
Forum section: electronics / general

author: SL4P
author_rank: Super Contributor
timestamp: March 10, 2018, 08:27:46 am
content: I may have missed it, but there seems to be a lot of hype about supercaps in *everything*.Sure they're great, but they're not going to replace rechargeable batteries in most applications for 'a while'.They seem to be the go to buzz of the moment for technology marketing.I personally use 1F/5V supercaps a lot, but they're not going to eliminate my power supplies at a cost-effective point for quite a while.Would it be worthwhile to put together an episode that explains the charge/discharge and retention characteristics of commonly available supercaps vs the major battery technologies ?Graphs/Time, worked examples etc.TIA

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 10, 2018, 03:50:18 pm
content: The fundamental property is: a time constant in the seconds range.Electrolytics are in the milliseconds to tens of microseconds range, and batteries are in the minutes to hours range.What is the meaning of this time constant? It is the fastest you can discharge the device. It is also a measure of how fast you can draw some load at some efficiency. The short circuit current is the most current you can possibly draw; and a short circuit does zero work, so the efficiency is zero. A half-short dissipates half the energy, so has an efficiency of 50%, and takes twice as long to discharge. It follows: lower currents, applied for longer time scales, can be drawn at higher efficiency.Eventually, as time scale goes up, efficiency goes back down, as self-discharge begins to dominate. Usually a time constant of weeks or months.This generalizes to all energy storage media: there is a minimum and maximum rate at which that energy can be cycled, at a given efficiency. In this way, you can determine which type of device is desirable for a given application.Tim
How to properly package electonic equipment for shipping - Page 1
Forum section: electronics / general

author: Messtechniker
author_rank: Frequent Contributor
timestamp: March 07, 2018, 02:49:19 pm
content: Since the EEVblog has a quite a few comments complaining about insufficient packagingcausing shipping damage, a thread something like "How to properly package electronicequipment for shipping" - boat anchors in particular - would in my opinion make sense here.Any comments on this proposal?

author: Ian.M
author_rank: Super Contributor
timestamp: March 07, 2018, 03:39:27 pm
content: Reactivate thehttps://www.eevblog.com/forum/repair/how-do-people-pack-delicate-instruments-properly/topic and ask one of our moderators to Sticky it.
Selecting Mosfets for the job - Page 1
Forum section: electronics / general

author: JustMeHere
author_rank: Frequent Contributor
timestamp: December 28, 2017, 04:53:38 am
content: I'd really like to see a quick lesson on how to read the mosfet data sheets.

author: Teun
author_rank: Regular Contributor
timestamp: March 05, 2018, 08:43:39 am
content: check out this:https://hristotrifonov.files.wordpress.com/2012/10/electronic-devices-9th-edition-by-floyd.pdfChapter 8
Dynamic Signal Analyzers.  What are they good for? - Page 1
Forum section: electronics / general

author: jgedde
author_rank: Newbie
timestamp: January 19, 2019, 06:23:22 pm
content: Dave,I want a DSA but I don't know why... Apart from fascination.I'd love to see a video on what a DSA can do for us. You stated on one video that you loved DSAs. I wanna know why and the things you use them for. Maybe a "DSA for Dummies" video...We have one at work that was used by a fellow engineer, but he passed away. He used to use it to measure gain and phase margins of motion control loops. He'd somehow use the signal output to insert a signal into loop. He'd then use the two inputs which could somehow be set up to represent the numerator and denominator of the control loop's overall transfer function. But, I know that's just one thing a DSA can do...Looking at new DSAs, it seems they are mostly interested in vibration analysis. Little mention is made of how they would be used (ior if they can be used) to measure circuit related things.Thanks for your great work in making educational yet very entertaining videos! We're using your sayings at work. Things like "That's a bit how ya doin", "Dodgy", "Bob's your uncle", "Winner winner chicken dinner", etc.Here's a funny one you'll get a kick out of being a parent to young children. My 9 y/o daughter came to me last night and right out of the blue said "Hi. Welcome to another episode of teardown Tuesday" using an attempt at an Aussie accent (which by the way is REALLY hard to imitate for us Yanks).John
Newbie Restrictions - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 01, 2018, 09:58:25 am
content: Due to some abuse of the PM function, newbies are now not allowed to send messages.So you need 5 posts to get to the next level to get that functionality.

author: Dubbie
author_rank: Unknown
timestamp: March 01, 2018, 10:03:44 am
content: Good idea.

author: tautech
author_rank: Super Contributor
timestamp: March 01, 2018, 10:07:15 am
content: Dave, can I ask about the Move Topic feature ?Has it been announced, if so where, and might it be a good idea to add mention of it to one of the Newbie stickys ?BTW, it's a nice addition.

author: ataradov
author_rank: Super Contributor
timestamp: March 01, 2018, 06:27:00 pm
content: This is awesome, I get a lot of people using PM as forum to ask generic questions and do their homework.

author: tpowell1830
author_rank: Frequent Contributor
timestamp: March 01, 2018, 06:32:04 pm
content: Should stop hit-and-run spammers.

author: PA0PBZ
author_rank: Super Contributor
timestamp: March 01, 2018, 07:49:27 pm
content: Quote from: EEVblog on March 01, 2018, 09:58:25 amSo that delays the spam for like 5 minutes?

author: ataradov
author_rank: Super Contributor
timestamp: March 01, 2018, 07:50:43 pm
content: Quote from: PA0PBZ on March 01, 2018, 07:49:27 pmThere are very few spammers here that leave more than one message. They will give up before they try to get 5 legit posts. Those monkeys doing the spamming are not that smart.

author: PA0PBZ
author_rank: Super Contributor
timestamp: March 01, 2018, 08:04:03 pm
content: Quote from: ataradov on March 01, 2018, 07:50:43 pmIt depends on the message they get when they try to send a PM, if it says you need 5 posts...

author: janoc
author_rank: Super Contributor
timestamp: March 01, 2018, 09:34:57 pm
content: Spammers are often automated bots - someone creates a bunch of throwaway accounts and then uses a bot to mass-post crap.

author: Brumby
author_rank: Unknown
timestamp: March 02, 2018, 02:19:13 am
content: This is better than what we had before and hopefully we won't have to increase the threshold.Let's see how it goes.
Ignore Boards and Topics - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: February 04, 2018, 11:22:29 pm
content: Just a reminder to those using the "Show Unread posts since last visit" feature.You can ignore entire Boards and individual topics if you don't want those to show up.It's under Your Forum Profile menu on the left side.

author: abraxa
author_rank: Frequent Contributor
timestamp: February 21, 2018, 09:28:54 pm
content: Just a note: if you can't find the option, use the double arrow near the top right to open the side bar. It was collapsed for me (by default?).

author: thm_w
author_rank: Super Contributor
timestamp: February 22, 2018, 12:19:58 am
content: oh nice, ignore user is there as well.Don't have to read posts from a certain cynical senior citizen
Forum section for EMC related issues - Page 1
Forum section: electronics / general

author: AndersJ
author_rank: Frequent Contributor
timestamp: February 23, 2016, 03:36:32 am
content: I would like to see a forum board dedicated to EMC issues.EMC posts are rather specific,and tend to get lost in the noise among posts in other sections.

author: c4757p
author_rank: Super Contributor
timestamp: February 23, 2016, 04:06:58 am
content: Holy crap, we're going to need a search tool just to find asectionsoon!I think we have way too many as it is.

author: crispy_tofu
author_rank: Super Contributor
timestamp: February 23, 2016, 06:01:40 am
content: Quote from: c4757p on February 23, 2016, 04:06:58 am+1Quote from: AndersJ on February 23, 2016, 03:36:32 amHa.

author: AndersJ
author_rank: Frequent Contributor
timestamp: February 05, 2018, 05:23:09 am
content: Second try,suggesting EMC should have its own board on this forum.On a rainy day,the moderators could scan the forum for posts, and move them.That was a joke, but it would be nice to have all EMC posts in one place.

author: Brumby
author_rank: Unknown
timestamp: February 05, 2018, 05:37:48 am
content: While I don't put down your idea - you have to understand one rather important factor....All too often one particular discussion can cross more than one category - and the question becomes: Which category should it be "filed" under?That is not an easy question to answer every time.
New forum thread for snake oil! - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: February 13, 2018, 12:33:32 pm
content: I've created a new forum section for dodgy tech, marketing wank, free energy, audiophoolery etchttps://www.eevblog.com/forum/dodgy-technology/

author: Muttley Snickers
author_rank: Unknown
timestamp: February 13, 2018, 01:18:58 pm
content: There is still a sticky Snake Oil thread in the General Chat section which might also need to be moved to the newly created dodgy section.https://www.eevblog.com/forum/chat/the-snake-oil-thread/

author: ataradov
author_rank: Super Contributor
timestamp: February 13, 2018, 05:21:41 pm
content: This would be a prime candidate for relocationhttps://www.eevblog.com/forum/chat/what-do-you-think-about-pmmg4hybrid/new/

author: bitseeker
author_rank: Super Contributor
timestamp: February 13, 2018, 06:34:14 pm
content: I like it!

author: Brumby
author_rank: Unknown
timestamp: February 14, 2018, 02:17:32 am
content: An engineering "cesspool" as it were.Keeping all the shit in one place makes sense. You will know to expect the smell - and avoid it if you're not in the mood.

author: EEVblog
author_rank: Unknown
timestamp: February 14, 2018, 02:59:46 am
content: Quote from: wilfred on February 13, 2018, 10:20:23 pmHard call that one, I'll leave it up to the initial poster to decide where to put it.Complete scam ones like the Triton Gill, new section for sure, others like say the Batteriser probably best in the Crowd funded section.
Suggestion for subforum: "Failure analysis" both retrospective and prospective - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: January 13, 2018, 12:26:37 am
content: I would like to see a subforum where failures and risks could be discussed with the idea of preventing them. Both past failures, particularly of technology, and also future failures, for example, particularly stupid ideas that are going unchallenged in society.For example, making society cashless (like they want to do in India and the US) when a solar storm (or nuclear EMP) could wipe out the grid for years, (or even longer if it caused a bunch of nuclear meltdowns as it would likely do), leaving billions of people without any way to buy food in the immediate aftermath.
Send Topic link broken - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 16, 2017, 01:42:34 am
content: It seems the "Send Topic" button on forum thread doesn't work. It gives an "invalid character" error message.Can others confirm?

author: retrolefty
author_rank: Super Contributor
timestamp: August 16, 2017, 01:45:39 am
content: Just tried and it seems to work, brings up a page to add recipient's email addy.

author: Brumby
author_rank: Unknown
timestamp: August 16, 2017, 01:46:50 am
content: Try actually clicking the SEND button on that page.I can confirm the invalid character fail...

author: JMThomas
author_rank: Newbie
timestamp: December 28, 2017, 09:48:07 pm
content: How do we request this issue be fixed?There are 87+ pages in the forumEEVblog Electronics Community Forum »Products »Test Equipment »$20 LCR ESR Transistor checker projectIf I'm ever going to absorb anything from it, I'm going to need to dump it in an editor and discarding the dross.In fact, I may even resort to printing it out and taking some highlighters (transparent markers) to it!In other words, I really want to send the form to myself...
Cleaning old PCBs & ESD - Page 1
Forum section: electronics / general

author: Adamus
author_rank: Newbie
timestamp: December 17, 2017, 03:38:23 am
content: I would love to see a video about all facts which are important during cleaning old PCBs.Sometimes we want to take apart our electronic equipment (even a plain PC) and clean it (you know, Christmas, etc.) before turning it on.Should we always use only those ESD-Safe brushes to clean boards and nothing else? Can we use a simple paintbrush (which hair?) or a toothbrush instead? Is it allowed to use a dry/wet(IPA) paper towel, Compressed Air Duster Can, hairdryer or just an air compressor without additional precautions?Dave has an ESD meter which may help to answer some questions.Bonus part could be about anything water-related (& rust) during cleaning. IPA is my favorite choice, but some GSM people say "use a mixture of water & detergent to remove sugar at the very beginning".
Video suggestion: a beginners guide to capacitor types and when to use them. - Page 1
Forum section: electronics / general

author: Caelarius
author_rank: Newbie
timestamp: December 10, 2017, 12:00:50 pm
content: Electrolytic, ceramic, tantalum, poly-whatevs, supercaps....... When do you use which type?So my suggestion is for a beginners guide video on what type of capacitor do you use for which application(s). If you're designing a circuit, does it matter (much?). And also, quite important, can you whack in another type without releasing the magic smoke? Especially with elco's vs non-polarity versions. E.g. when a circuit calls for an electrolytic 10 uF 16V, can you safely replace it with a jellybean SMD 10uF 16V? Or vice versa. Does it have an impact on functioning of the circuit as long as you keep within the maximum ratings?

author: retiredcaps
author_rank: Super Contributor
timestamp: December 10, 2017, 07:34:33 pm
content: A 1000 videos agoand a few others Dave have done by searching for "eevblog capacitor".

author: Caelarius
author_rank: Newbie
timestamp: December 10, 2017, 09:25:51 pm
content: Damn, I must have been still asleep to miss those.Anyways, a 1000 episodes ago. When Dave limited himself to 10 minutes!
Body heat powered watch - Page 1
Forum section: electronics / general

author: Piotr_ts
author_rank: Newbie
timestamp: November 10, 2017, 04:16:31 pm
content: Hi,I found today advert of this watch:https://www.powerwatch.com/Sniff, sniff... am I the only one smelling BS?According to this article:http://www.electrochem.org/dl/interface/fal/fal08/fal08_p54-56.pdfSeiko build such a watch but the cell was providing only 22 uW of energy. I strongly doubt it is possible to power a device with a display and a wireless communication from such source.What do you think? Looks like a subject for a debunking video.Piotr

author: Simon
author_rank: Unknown
timestamp: November 28, 2017, 06:42:34 pm
content: Dave did a video on this, no it's hopeless, there is not enough temperature difference to make the power.

author: Gyro
author_rank: Super Contributor
timestamp: November 28, 2017, 06:43:33 pm
content: I can't think why they're bothering. A photovoltaic panel is going to be much thinner and more efficient.... and a watch has a dirty great window on the front.

author: SparkyFX
author_rank: Frequent Contributor
timestamp: December 03, 2017, 02:34:57 am
content: There are solar powered wrist watches on the market... since decades.

author: npelov
author_rank: Frequent Contributor
timestamp: December 13, 2017, 09:40:46 pm
content: Quote from: SparkyFX on December 03, 2017, 02:34:57 amThey could have put a solar cell and say that the cell is just to add to "body power", and actually power the watch only by the solar cell and a battery. At least solar cell is proven to work and the product won't fail.
Brand specific sub forums in Test & Measurement? - Page 1
Forum section: electronics / general

author: rhb
author_rank: Super Contributor
timestamp: November 28, 2017, 03:51:21 pm
content: Could we add OEM specific categories under Test & Measurement? A lot of time the search turns up lots of hits where someone merely mentions a piece of gear. In my case, I have new Instek kit, but the only user forum they have is on Facebook which I don't really want to use.
Forum topic suggestion: Industry standards, test labs, approval agencies, etc. - Page 1
Forum section: electronics / general

author: Tomorokoshi
author_rank: Super Contributor
timestamp: November 25, 2017, 09:46:26 pm
content: One of a collection of topics that pops up occasionally has to do with industrial standards, the EMC and safety test labs that check products to those standards, approval agencies, and other related things.I've found posts on these topics variously in "General", "Test Equipment", "Products, Designs, and Technical Stuff", etc.Would it make sense to have a sub-forum specifically for these and related topics?
I like the new kid! - Page 1
Forum section: electronics / general

author: ErikTheNorwegian
author_rank: Frequent Contributor
timestamp: November 29, 2017, 08:35:24 am
content: I must say i like the new kid!New to video blogging he is doing a excelent jobb! No easy task to jump in and start aside with Dave.I dont judge people, and i dot expect that David should be a clone of Dave..Keeep up the good work!Erik
Microchip Development Kits - Page 1
Forum section: electronics / general

author: SgtTech
author_rank: Contributor
timestamp: April 19, 2018, 10:19:46 am
content: Hi Dave,How about doing a review of the Microchip development kits range? You could include a review of the new Pickit4, various development boards they sell and their cloud based development environment. You could maybe do a basic microcontroller tutorial using their kit.These kits look good to me as a novice but which one do i choose and for what. I think if you know what you are trying to do its is easier but which kit would you recommend for people just learning and experimenting without a specific project in mind?Maybe Microchip would stump up for a few give away kits or discount codes that you could run a competition on.Ian

author: poorchava
author_rank: Super Contributor
timestamp: April 19, 2018, 02:12:20 pm
content: It kinda beats me why would anyone want to use a PIC. ARMs are more cost effective and have much better development tools and know-how on the Internet. dsPICs are a sad joke when compared to Cortex-M7s or C2000 from TI (as much as I hate the latter ones, they do pack some serious punch).PIC24s and dsPICs still have at best 2 clocks per instruction while ARMs often average >1.5 instruction per clock (M7's even >2). They are littered with bugs and current devtools just plain suck (they had it right in the past, Pickit2 + MPLAB v8.xx dev setups were really fast and stable and they had all the functionality required).Microchip is good, but for cheap, simple and available analog and power stuff and those things I actually use a lot. They have no idea how to make a good uC nowadays though.</rant>

author: Karel
author_rank: Super Contributor
timestamp: April 19, 2018, 02:52:18 pm
content: Well, for starters, the documentation is good. The peripherals are good. The DMA controller is very flexible. Big FIFO's for SPI and UART, etc. etc.For example, Microchips' SPI peripherals have the option to delay the input data sampling.When acting as a master, it solves the problem of the long propagation delay in digital isolators when dealing with ADC's at high bit rates.It avoids the use of two SPI-interfaces (clock loop-back method):http://www.electronicdesign.com/microcontrollers/isolate-your-high-speed-spi-bus-despite-long-propagation-delaysAre there ARM MCU's that have the same option?

author: thm_w
author_rank: Super Contributor
timestamp: April 19, 2018, 08:22:59 pm
content: Mike will do a good review of the pickit4 soon enough.https://www.youtube.com/channel/UCcs0ZkP_as4PpHDhFcmCHyA

author: JPortici
author_rank: Super Contributor
timestamp: April 20, 2018, 06:15:30 am
content: Quote from: poorchava on April 19, 2018, 02:12:20 pmsorry i won't bite
Electronics Workshop Safety. - Page 1
Forum section: electronics / general

author: ChrisLX200
author_rank: Unknown
timestamp: October 12, 2017, 03:17:55 pm
content: I would like to see an article on this subject. Potentially boring? Possibly to some - but also hopefully useful and it just might save some youngster from hurting themselves or burning their family home down :-)ChrisH

author: Richard Crowley
author_rank: Super Contributor
timestamp: October 12, 2017, 03:47:09 pm
content: Google revealed:https://www.allaboutcircuits.com/textbook/direct-current/chpt-3/importance-electrical-safety/That is the first of 10 sections in Chapter 3: The Importance of Electrical Safety

author: ChrisLX200
author_rank: Unknown
timestamp: October 12, 2017, 04:32:28 pm
content: Quote from: Richard Crowley on October 12, 2017, 03:47:09 pmA good source of information, but perhaps a little 'dry' and does not have the impact (nor audience) that Dave would have talking about it in a video. That's just my opinion though and I could be wrong, but I believe Dave has a certain talent for explaining things :-)

author: sarel.wagner
author_rank: Regular Contributor
timestamp: October 24, 2017, 01:29:03 pm
content: This video is about Safety for hobby, Lab and electronics Workshops. Its a tongue in cheek look at the safety nazis everywhere, and my take for safety applicable to people watching my videos.https://youtu.be/45mHzyVeFGwThis does not mean in any way, any one can ignore safety.Be safe
Video suggestion - Page 1
Forum section: electronics / general

author: marekpasek
author_rank: Contributor
timestamp: October 29, 2017, 10:17:15 am
content: Hi,I was wondering if it would be possible to make a video about Keithley high voltage power supply, Dave has in his lab (he was using it to power nixies for example). I am quite curious to know how it is designed (it is Keithley, it must be just awesome). So I suggest, you know, complex video (teardown, specifications, a bit of reverse engineering, a few DaveCads...). I think it would have been found quite interesting.Thanks
Soldering Iron Shootout? - Page 1
Forum section: electronics / general

author: Geonerd
author_rank: Contributor
timestamp: June 18, 2017, 06:51:28 pm
content: Hi Dave.Perhaps you could compare a few of the less expensive (but hopefully not too shoddy) base+iron kits out there?My trusty Pace is in its last legs and there are so many options for a light / small station.As always, thanks for the forum, videos, etc.

author: DimitriP
author_rank: Super Contributor
timestamp: June 18, 2017, 10:39:45 pm
content: QuoteBeing partial to Pace I'll say the best replacement for a PACE is another PACE

author: PA4TIM
author_rank: Super Contributor
timestamp: June 18, 2017, 11:03:36 pm
content: I made that mistake too. After 2 years with a Metcal, I now use my old trusty Pace MBT250 again. Replaced the SX-70 with the SX-100 and whished I had done that 2 years ago instead of investing 800 euro in that piece of Metcrap.I was in doubt too because my Pace was so old. I mailed Pace for advise and they helped me to sort out what to do to update my Pace (partnrs etc)If you are used to Pace I do not think you like a B-brand. I have good experiance with Weller too. (WS81) I use that for smd)

author: VEGETA
author_rank: Super Contributor
timestamp: October 15, 2017, 04:13:41 pm
content: This is a perfect suggestion! I highly aid it.He should do one for less than 50$ and one for 100$.
Op-amp: "Under the hood" - Page 1
Forum section: electronics / general

author: sasa
author_rank: Regular Contributor
timestamp: October 01, 2017, 12:30:59 pm
content: Dave,In the episode #600 (I watched long time ago), you have explaining op-amp functionality. This is one of the best explanation I have ever seen, in exception of two small things: some math incorrectness (missing brackets, IIRC) and missing explanation how to properly handle unused op-amps in multiple op-amps IC...In any event, to paraphrase your few words from episode #600: "You do not want the hard way to understand op-amps, you want the easy way!"...Not enough in my case though, perhaps other people as well. I always find better to look "under the hood" for better understandingwhyit actually do what it do than onlywhat. I simply find that much efficient educational model in order to understand and remember elementary stuff, which later also help to understand exactly all variations of it and reasons of their existence.You did excellent such "under the hood" review for NE555 and such similar review may as well be interesting for one of the simplest op-amp as is LM741.Just a small suggestion to eventually consider for any of future videos, for these who prefer video explanation. Otherwise, this post with all documentation links is more than helpful:https://www.eevblog.com/forum/beginners/opamps-for-everyone-pdf/

author: David Hess
author_rank: Super Contributor
timestamp: October 01, 2017, 07:16:09 pm
content: The 741 is actually pretty complicated because of its cascode input stage which is used to support a high differential input voltage. The 4136 or 324 is easier to understand. The 324 has the virtue in that you can find both simplified and complete schematics to compare them although Texas Instruments of course lies, err, I mean labels theirs incorrectly.The Audio Power Amplifier Design Handbook by Douglas Self goes into detail about 3 stage operational amplifier design and can be applied directly to the 741, 4136, and 324.The old Nationalapplication note A, The Monolithic Operational Amplifier: A Tutorial Study, is an excellent reference which covers exactly what you are asking for.

author: rfeecs
author_rank: Frequent Contributor
timestamp: October 02, 2017, 06:44:44 pm
content: I found this really interesting:"IC Op-Amps Through the Ages":http://www.ee.bgu.ac.il/~angcirc/History/Solutions_2003_2004_B/SomeStuff/History18opamp.pdfIt goes through the design of many of the early op-amps and shows the progression of improvements with each new design.

author: David Hess
author_rank: Super Contributor
timestamp: October 02, 2017, 09:43:46 pm
content: Quote from: rfeecs on October 02, 2017, 06:44:44 pmSection 8-4 of Op Amp Applications Handbook by Walter Jung is very similar. The whole thing is available on Analog Device's website:http://www.analog.com/en/education/education-library/op-amp-applications-handbook.html
EEVblog Server Reboot - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: October 03, 2017, 06:11:47 am
content: The server is about the rebooted for installation of some new backup software. The forum will be down for a bit.

author: gnif
author_rank: Unknown
timestamp: October 03, 2017, 08:48:27 am
content: The reboot was just performed successfully, about 8 minutes of total downtime. This was performed under advisement by HostGator to lift some network limitations they had in place which were causing issues with the new backup solution.And before anyone asks why... I honestly don't know why for certain, but if I was to guess it might be because HG have Dave's server running as a VPS on a dedicated server (ie, dedicated only to Dave) and the restrictions may have been on the VPS instance itself.Edit:Confirmed, we are now seeing excellent throughput to the backup system.

author: bd139
author_rank: Super Contributor
timestamp: October 03, 2017, 09:26:24 am
content: We just had the same on some AWS boxes. Might be related to embargoed stuff here being slid in quietly too:https://xenbits.xen.org/xsa/

author: gnif
author_rank: Unknown
timestamp: October 03, 2017, 09:41:09 am
content: Quote from: bd139 on October 03, 2017, 09:26:24 amUnlikely as the reboot has only improved throughput to the one host we notified them about, all other comms are performing the same as before.
Repairing Stuff or Repairing Stuff for Repairing Other Stuff - Page 1
Forum section: electronics / general

author: EHT
author_rank: Frequent Contributor
timestamp: October 23, 2017, 08:26:17 pm
content: Can we split outRepair Test EquipmentfromRepairplease? Well over half of Repair is about test equipment, which is a specialized topic. At the moment this is jumbled up with the odd confused person asking about repairing a lawnmower or such like. Ideally it would be best to have sub forum such as:Test EquipmentComputer HardwareAV EquipmentOtherViews?

author: bd139
author_rank: Super Contributor
timestamp: October 23, 2017, 08:29:06 pm
content: Our test equipment is always broken though

author: EHT
author_rank: Frequent Contributor
timestamp: October 23, 2017, 09:04:07 pm
content: Yeah, I know. I read the forum for that and have a pile of such equipmentIt does make you wonder if the test equipment is just for fixing other test equipmentIt just seems odd to have random other questions in the same forum as well.

author: tggzzz
author_rank: Super Contributor
timestamp: October 23, 2017, 09:25:38 pm
content: Quote from: EHT on October 23, 2017, 08:26:17 pmBad idea.The problem with all taxonomies is that they presume a single hierarchy is The One True Way.It never is; the world and thought processes are too complex and varied for that.Example: is the hierarchy based on manufacturers or on type of equipment "more correct"? HP/Tek/Fluke vs scope/multimeter/logic analyser/spectrum analyser?

author: bd139
author_rank: Super Contributor
timestamp: October 23, 2017, 09:40:17 pm
content: Quote from: EHT on October 23, 2017, 09:04:07 pmYes that's what it's for
FPGA - reviving retro computin and gaming - Page 1
Forum section: electronics / general

author: paulcav
author_rank: Contributor
timestamp: September 18, 2017, 12:28:52 am
content: It has been many many moons (a very long time) since theApple 2 computerwas launched as well as theAtari ST,Amiga 500,Commodore 64,Vic 20just to name a few. Now that they are no longer manufacturing these personal computers what can you do? There is finding them for sale on eBay, classifieds but only second hand and sometimes they are not working or incomplete. A typical scenario is that you have come across a game that you once played on a computer back in the 80's or 90's and it brings a tear to your eye. So what to do? A possible solution is to use a FPGA to create the logic circuitry of a 6502 or whatever CPU you want and bring back that old Apple or Atari or Amiga computer so you can explore what is was like in days gone by or perhaps replay that old favourita pub game Galaga.What i would like to see is Dave examine the old computers and show how modern technology such as FPGA can be used to recreate these computers and demonstrate how flexible these FPGA devices can be in that they can be reprogrammed to be used for more than one computer hardware design.There are a number of these devices that i have come across such asFPGA Arcade or replay,MIST FPGAi'm sure you get the idea.

author: brucehoult
author_rank: Super Contributor
timestamp: September 18, 2017, 06:06:46 am
content: FPGAs are a bit of overkill for this purpose. PC CPUs have been capable of software (serial) emulation of that generation of hardware for twenty years already.https://en.wikipedia.org/wiki/MAMEThese days, an ARM machine such as a Raspberry Pi is fast enough to do this kind of emulation.You can get FPGA chips that would do the job cheaper than a Raspberry Pi, but I don't know of any *boards* containing them, and the necessary peripheral drivers and connectors, that are cheaper.Of course it can be a fun exercise anyway.
oh where, oh where is the OTA? - Page 1
Forum section: electronics / general

author: grouchobyte
author_rank: Regular Contributor
timestamp: August 26, 2017, 04:06:50 am
content: Hope you are reading this Dave.Recently, I have been implementing OTAs (operational transconductance amplifiers) in some of my client designs and find them fascinating and a useful analog/functional block (ie: OPA860/OPA861)http://www.ti.com/lit/ds/symlink/opa860.pdfThe old crusty classic LM13700 is still around but it is getting a little up there in age (close to 40 years old and older than some of us- not me however)I noticed that there is not much OTA discussion in the forums and perhaps a video or fundamentals Friday touching on some the benefits of these babies might rekindle some interest in the community.I might even tune in myself.....@grouchobyte

author: Tomorokoshi
author_rank: Super Contributor
timestamp: August 31, 2017, 03:36:49 am
content: I just ran across these at Digi-Key. It may be the solution for some designs going forward. It would be nice if one could clearly drive up to 30 mA, but there should be ways around that.
Bioresonance device scam comment/analyze - Page 1
Forum section: electronics / general

author: xristos
author_rank: Newbie
timestamp: August 12, 2017, 01:28:15 pm
content: These bio-resonance devices claim to scan your body and find whether there's something wrong just by holding one electrode in each hand.Its a very serious medical scam, and "doctors" who use it charge a large amount of money for each visit. It is really growing in my country( i ve also seen it in other places) and when i talk about it to other people they seem to think i am narrow minded and cant see the scam.I would love it if you could comment on the technical aspects of this device, so people learn what this truly is.(looks like this:[url=https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/]https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/] [url=https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/]https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/]https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/] https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/]https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/]https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/]https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/] https://www.holimed.com/the-inexpensive-bioresonance-device-bioswing-pro/)
Thermal Runaway and Bad Crimping - Page 1
Forum section: electronics / general

author: japasetelagoas
author_rank: Regular Contributor
timestamp: August 08, 2017, 04:43:24 pm
content: Dave,Please explain to us the effects of bad crimping, thermal runaway and what type of analysis needs to be conducted when a toasted wire appears somewhere in the circuit (and you've narrowed down all possibilities except for the cable itself).This is not an actual electronics topic, more on the electrical side of things but still, Dave's explanations are a different thing.I haven't checked his entire channel yet but considering all the videos I've seen, I couldn't find anything related.Thanks.

author: Brumby
author_rank: Unknown
timestamp: August 08, 2017, 05:36:42 pm
content: There's an idea for a video - thermal problems ... in general. Dave did a video which covered thermal resistance - but there are a number of other thermal problems you can encounter...... and if you want to get into the nitty gritty of crimping - there'd be a video of that by itself, especially if you go up to industrial cabling!
Own videos for design kits / ICs from mailbag - Page 1
Forum section: electronics / general

author: TacticalCode
author_rank: Contributor
timestamp: August 07, 2017, 01:25:32 pm
content: So I just watched Dave's most recent Mailbag video, and @35min he shows a breakout board and next he unboxes a Sillygo reset chip design kit.He didn't go into to town with these, and I think we all know why. I totally agree with only briefly looking at it in the mailbag videos, but I'd still like to see that stuff showcased in a separate video.I can't be the only one interested in seeing all these discovery kits / chips / breakout board solutions showcased in their own video category... RIGHT?! I mean there seem to be quite some of these manufacturer-sent-in products, that just can't be set up and properly demonstrated (and maybe even explained?) in a mailbag, and I imagine not all of them deserve their very own video. Splitting these things off Mailbag would keep the (sometimes) awkward, "self-sponsored" parts, with stuff sent in by companies, off the mailbag videos, to create a new category of videos about only them.That new video category would actually show the sent-in products in use, performing a task or something, seeing if it does what it claims to do and how. I'm certainly interested in watching videos about these things (like that reset chip), how they work, how to add them to your design, just giving some exposure to new or interesting solutions that get sent in by manufacturers, but collect dust somewhere in a bunker(?) after being unboxed on mailbag. Even if I won't ever use that specific chip or implementation to do the job, it's still interesting to see what new products there are, and what I can accomplish with them.And lastly, I wouldn't mind if these videos were sponsored by some company who sent stuff in, a chip producer, a supplyer or what not. David² could prepare work by setting up a showcase to display some waveforms on the scope or measure specs. I'm speaking to you, Dave. Even with no sponsor, there's still YouTube ads and perhaps Amazon affiliate links. But I think these vieos in particular would be a great sponsorship opportunity, because you gotta buy that stuff SOMEWHERE, y'know. And while I can't speak for others, I wouldn't mind a hint at where to buy these things to support the channel. You could even make some of those companies, who get free exposure from you on Mailbag, support you by engaging with them to do a sponsored "Showcase"-type video. I hope that's enough bribing for you!tl;dr Make videos about those Kits/ICs that take too long for mailbag, like a "New Products" videos by Adafruit, but with fewer, actually interesting products, seen put to use and explaining some of the stuff alongside. Dave doesn't have to showcase every single new Item he gets, but he can pick and chose the best stuff for video material, and produce a 20-30 minute video about them, going more in-depth.What do you think?
Joint Dave and Sagan video - Page 1
Forum section: electronics / general

author: lazarusr
author_rank: Regular Contributor
timestamp: April 28, 2017, 04:47:34 pm
content: Rather off-topic. But it would be so cool if Dave and Sagan did a joint father/son video on this:https://ideas.lego.com/blogs/1-blog/post/137?cmp=Other-GLO-Ideas-OLA-Apr-17-IdeasApollo-POST-Facebook-apollo-CO-LEGO-

author: German_EE
author_rank: Super Contributor
timestamp: May 08, 2017, 05:17:06 pm
content: OK, no replies since your original post so I'll bite.Dave (so far) has been very careful keeping the EEVBlog and his family life separate, there are some creepy scary people out there and he needs to be careful, especially as he is a public figure. If he wants to create a video post containing Sagan or Huxley then it's his call.An example of this, when was the last time we saw Mrs EEVBlog? Or Huxley?

author: thm_w
author_rank: Super Contributor
timestamp: May 08, 2017, 08:21:57 pm
content: Why should he be afraid. He posts videos occasionally, the last was all of them a week or so ago.

author: Towger
author_rank: Super Contributor
timestamp: May 08, 2017, 08:32:28 pm
content: Quote from: thm_w on May 08, 2017, 08:21:57 pmA number of ex fan are nut jobs...

author: lazarusr
author_rank: Regular Contributor
timestamp: July 08, 2017, 01:10:23 pm
content: Told 'ya!
EEVtest - A segment about testing (and characterizing) eBay stuff under $50 - Page 1
Forum section: electronics / general

author: victor
author_rank: Regular Contributor
timestamp: October 05, 2017, 11:31:42 pm
content: I really liked the, and I want to suggest more videos like this. I want to see you test stuff and characterize, or at least check the claimed specs and see the true max specs.Like I wanted at least to see what is the true max power of those modules, you have all the gear needed to test pretty much all the specs.I think it can be a very interesting and successful segment on the channel, and you have pretty much unlimited content to cover.Maybe you can finish the episode by taking it to the limit until the magic smoke comes outSo far the response to that video is very good
The Potential Health Benefits of "Earthing" - Page 1
Forum section: electronics / general

author: dbillings
author_rank: Newbie
timestamp: November 10, 2017, 04:23:09 pm
content: Yeah.. I guess this is a thing.http://www.earthingfairfield.com/Earthing%20Products%20FAQ.htmlMy favorite part:"Once the body is grounded, the rate of influx changes, and the body will only absorb that amount of electrons needed to maintain the same electrical potential as the Earth and to restore what is lost in the body’s metabolic processes. It may take many quadrillions to get the body stable. As long as a person continues to be grounded, the body can use the Earth as a natural reservoir, or “power source,” of electrons to maintain a “topped up” homeostatic level that compensates for any attrition of internal electrons. With connection to the Earth, it would thus seem hard for the body to develop any electron deficiency, and, theoretically, any chronic inflammation."

author: dbillings
author_rank: Newbie
timestamp: November 10, 2017, 04:28:57 pm
content: https://www.earthing.com/Here's the store.

author: Richard Crowley
author_rank: Super Contributor
timestamp: November 10, 2017, 04:30:10 pm
content: Too bad that "wireless wrist strap" was a fraud. Do they specify the maximum impedance for effectiveness? Or is it "homeopathic" and 1M will do the job?

author: dbillings
author_rank: Newbie
timestamp: November 10, 2017, 04:33:24 pm
content: Hehehe... I even found a youtube video...https://youtu.be/Z4F8mterVGE

author: Brumby
author_rank: Unknown
timestamp: November 14, 2017, 12:39:22 am
content: Not what I think of when talking about a person being "well grounded".

author: Rerouter
author_rank: Super Contributor
timestamp: November 14, 2017, 01:29:51 am
content: The health benefits of "Earthing" come from the RF and Emmision test engineers, not having all that noise to mess up things for them saves there hair from being torn out, there stress levels from rising, and foreheads impact damage when the tests come back as failed.The other benefits of "Earthing" come from the massive health benefits of not being electrocuted to buggery when you think you can unlodge that bit of toast in the toaster while forgetting to unplug it.

author: rhb
author_rank: Super Contributor
timestamp: November 14, 2017, 01:50:01 am
content: ROFL! The FAQ is truly priceless.

author: Cyberdragon
author_rank: Super Contributor
timestamp: November 14, 2017, 02:01:01 am
content: Quote from: Rerouter on November 14, 2017, 01:29:51 amBut...if you actually grounded yourself it would make any electric shock far worse!Wait a minute...*dastardly red lightbulb of evil thoughts about Darwinism illuminates*