hybridfree/eevblog-posts huggingface dataset:
TUM Hyperloop - A €3.5M Boondoggle - Page 1
Forum section: electronics / general

author: Barny
author_rank: Frequent Contributor
timestamp: December 26, 2023, 10:21:52 am
content: The holes at 14:10 are to reduce the material usage by keeping stability.Funfact:The goverment of bavaria is dreaming of theire own space program.(Bavaria One)The party CSU is famous for shady and / or "not that wise" projects.

author: madires
author_rank: Super Contributor
timestamp: December 26, 2023, 11:42:43 am
content: If the engineering students learn something from thatnonsense, maybe the money is not wasted totally.

author: RoGeorge
author_rank: Super Contributor
timestamp: December 26, 2023, 06:20:28 pm
content: No idea if the project is feasible or not, but if it is not feasible, then training students and engineers is not a valid excuse. Students and engineers will gain experience just as well by building viable projects.
What changed at youtube? - Page 1
Forum section: electronics / general

author: watchmaker
author_rank: Unknown
timestamp: December 24, 2023, 11:46:56 pm
content: When I go to Dave's video library, I have to endure at least 4 minutes of noise before I can watch that video and then the same thing happens again when I watch another video.This did not happen earlier in the week. What changed? And can I do anything about it?Thanks!

author: wilfred
author_rank: Super Contributor
timestamp: December 25, 2023, 01:53:11 am
content: I'm not having issues with YT. Not on any of my regular channels, and I also tried EEVBLOG and it worked normally.I suggest trying a second browser if you can and/or disabling all add-ons and extensions just to try to narrow down the source of the problem.

author: watchmaker
author_rank: Unknown
timestamp: December 25, 2023, 09:43:17 am
content: Merry Christmas.Nope. You Tube is experimenting.After trying another browser, I went to private mode and copy pasted the URL. I got the standard 5 second ad with skip option.Cleared all browser data and shut down for the night.Started up just now and did not sign in. Got the 5 minute commercial (political) with no options. Canned it and went to VPN (Australia). Got the correct behavior. Signed in and got 2 short commercials (one for Aerogard spray from Australia).When my ISP is New Hampshire, I get that 5 minute political ad and maybe 2 others.I "think" my computer is locked up tight. Malware Bytes Pro and extension with full protections.Dewey

author: RoGeorge
author_rank: Super Contributor
timestamp: December 25, 2023, 02:19:23 pm
content: First, do not login into any google or youtube account.Second, use a browser other than Chrome.Third, install the 'uBlock Origin' browser extension then check all the checkboxes in uBlock and update all its filters.This might work (or it might not work) depending on your geolocation, and depending on who's trying to fry out your brains.

author: Dan123456
author_rank: Regular Contributor
timestamp: December 25, 2023, 03:01:55 pm
content: Yeah I’ve noticed it too over the last couple of weeks.Rather than 2 X 5 second ads, or all adds being skipable after 5 seconds, I am now getting 2 X 15 second unskipable ads at pretty much every ad break.I have found there are ways to skip the second ad without needing Adblock etc. but it is getting really, really annoying to deal withPlus honestly, I seriously reckon uping the ad time has got to be hurting the brands more than it helps them!I will know if I am interested in a product or not within the first 5 seconds! If they force me to watch another 10 seconds after that, they will just start pissing me off which means I am now just associating their brand with being annoyed

author: watchmaker
author_rank: Unknown
timestamp: December 25, 2023, 04:12:05 pm
content: Quote from: RoGeorge on December 25, 2023, 02:19:23 pmDownward arm pump. YES!!! uBlock does it and I do not have to be logged out. Smart people ROCK!Dewey
EEVblog 1568 - Tesla Megapack 2 Battery FIRE! at Bouldercombe QLD - Page 1
Forum section: electronics / general

author: .RC.
author_rank: Frequent Contributor
timestamp: September 29, 2023, 12:28:03 am
content: Since I do not have a youtube account so cannot comment on the video on youtube.You pronounce the name Bouldercombe without the e on the end. So it is Boulder+Comb. Maybe a long time ago they combed boulders there? I dunno.Also there is a proposed solar farm on the adjoining land where battery and substation is. Although it has been proposed for seems like ten years or more.For the renewable aficionado's, if you go to Qld Globe websitehttps://qldglobe.information.qld.gov.au/go to layers -->> add layers, then down the bottom the utliities and communications layer, you can bring up proposed, under construction and operating renewable facilities. Although it is not exactly up to date as that battery site is not marked, but other sites in the region are.

author: .RC.
author_rank: Frequent Contributor
timestamp: November 04, 2023, 03:40:38 am
content: Bit of an update. Tesla are replacing two of the modules.

author: rteodor
author_rank: Frequent Contributor
timestamp: December 20, 2023, 08:04:53 pm
content: Any update/report on this fire ?I am curious on this because of the LFP battery type.PS: Not that it would have too much credibility (the case of bad Land Rovers becoming the piniata of Luton parking place fires destroyed much of the trust in media reports) but still...

author: thm_w
author_rank: Super Contributor
timestamp: December 20, 2023, 10:32:53 pm
content: Quote from: rteodor on December 20, 2023, 08:04:53 pmYou can do a quick google and find the result:https://www.teslarati.com/tesla-megapack-fire-australia-didnt-start-from-battery-modules-analysis/Quote
EEVblog 1585 - SCAM! Portable Kinetic Molecular Heater BUSTED - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: December 11, 2023, 09:35:15 pm
content: The Portable Kinetic Molecular Heater is an obvious SCAM.We shouldn't have to look at why, but let's do it anyway.00:00 - Portable Kinetic Molecular Heater01:06 - Yep, it's a scam03:06 - A look at the ridiculous website claims06:31 - It can heat your entire home and melt the snow on your roof!07:27 - Running the numbers on the Latent Heat equation.12:05 - The BS comes in many flavours15:14 - Teardown of the actual Portable Kinetic Molecular Heater17:52 - Thermal camera test

author: .RC.
author_rank: Frequent Contributor
timestamp: December 12, 2023, 04:51:43 am
content: I found some cheaper portable molecular heaters These ones really will de ice your house or car at least once if used indoors.https://www.woolworths.com.au/shop/productdetails/21462

author: djacobow
author_rank: Super Contributor
timestamp: December 12, 2023, 06:07:25 am
content: Technically, a scam, but I feel like for something to qualify as a scam, it should be capable of duping people with IQ higher than μ-5σ.

author: golden_labels
author_rank: Super Contributor
timestamp: December 12, 2023, 12:41:02 pm
content: A detail Dave missed. The second vendor secured themselves against unhappy customers. They clearly indicated(1)working range to be -80 °C to -20 °C.The smell thing is not a scam. These are car aroma dispensers with fancy look. Honest sellers are not pretending to be otherwise. See eBay item 394981209695 as an example. One puts an aroma source in the base and the rotating part acts as a decoration.(1)At 14:47, see attachment.

author: Haenk
author_rank: Super Contributor
timestamp: December 12, 2023, 03:39:45 pm
content: Funny, Big Clive "tested" exactly the same crap, two days ago:

author: Shash
author_rank: Newbie
timestamp: December 12, 2023, 10:11:42 pm
content: A slightly different approach to the scam.https://cheapelectrcitysave.com/save?s3=120200849833380617&s4=120200849661730617&utm_medium=paid&utm_source=fb&utm_id=120200849661720617&utm_content=120200849833380617&utm_term=120200849661730617&utm_campaign=120200849661720617&fbclid=IwAR1N9FwaOYejld1JI6ccLxCybB-Kekp_7IGZ_KeC-cWJq882N5hIdWNcwRo
EEVblog2 - Pool Heat Pumps Explained - Page 1
Forum section: electronics / general

author: DL4JY
author_rank: Regular Contributor
timestamp: December 08, 2023, 11:47:23 am
content: Hi Dave,I am following your topics for a while, I find them really enlightning.However, I am unsure about your findings regarding Delta_T for Warmwater heatpumps.To my understanding is the efficiency getting better with smaller Delta-T . I have only a German language link for you - but I know you can read that !https://www.udo-leuschner.de/basiswissen/SB127-05.htmThe other thing to mention is that 3-way valves are not a good thing for splitting flows. Ever thought about a Chinese Frequency inverter - I have one of this in use for my pool's waterpump, as I want to have less power consumption. Be aware cheap ones need ferrite - due to RFI they generate.best regards,Jürgen from Germany - no season for swimming in outdoor pools today !!
Weller WSD81 conversion for WEP70 handle - Page 1
Forum section: electronics / general

author: mb.raghavendra@gmail.com
author_rank: Newbie
timestamp: November 28, 2023, 05:15:32 pm
content: Hi All,Looking for help with conversion of WSD81 station to work with WEP70 handle(Iron). . . I have added schematic for WSD81, Temp to ohm measurement of WEP70 .Can someone calculate how to change values near op amp to get work WSD81 with WEP70 handle? Please look in to Opamp circuit and guide me how to calculate gain. i am unable to understand amplifier circuit.Also observed that WEP70 sensor output is 42uv per deg C. Connected MAX31856 Thermocouple to Digital Converter as K type and there is difference up to 30 deg C. If used as J type, 10 deg C difference . i want use existing circuit ofWSD81 with amplifier modification.I disconnected op amp output from uC(PIC 16F833) and added 0-5V power supply. Then I measured changes voltage on uC input to temperature on display.3.76V -> 450C3.6V -> 430C3.5V -> 420C3.08V -> 350C2.76V -> 300C2.41V -> 250C2.06V -> 200C1.72V -> 150C1.55 -> 125C1.31 -> 100CTemp vs Ohm for WEP70https://drive.google.com/file/d/1rnwCHuXmn1hN-6EV6Uaop-YM5JTENz22/view?usp=sharingWSD81 Thermocouple amplifierhttps://drive.google.com/file/d/1UEseWgFicUVtNYRAA5qM3oc3ciavH3Uy/view?usp=sharingWSD81 Schematichttps://drive.google.com/file/d/13FuGd4SxCQ4SbISW1Xo0eS6DBc5uD1Re/view?usp=sharingSome information from other post, may be useful.https://www.eevblog.com/forum/repair/weller-we1010-conversion-for-wsp80-handle/
EEVblog 1576 - Tektronix DMM916 Multimeter Teardown & (Easy) Repair - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: November 01, 2023, 11:09:32 pm
content: Easy repair and teardown of the rather obscure Tektronix DMM916 Multimeter.Ebay auction:https://www.ebay.com.au/itm/225848873343

author: pickle9000
author_rank: Super Contributor
timestamp: November 02, 2023, 12:03:24 am
content: Hey I got one of those. Still use it, purchased new.

author: JoeRoy
author_rank: Regular Contributor
timestamp: November 03, 2023, 06:59:59 pm
content: My favorite DMM. I like the Low Voltage Ohms measurement.

author: flash2b
author_rank: Regular Contributor
timestamp: November 06, 2023, 09:16:35 am
content: Manufactured by Escort in Taiwan. Now this factory is owned by Keysight for their handheld DMMs.

author: David Hess
author_rank: Super Contributor
timestamp: November 19, 2023, 06:09:39 pm
content: Quote from: flash2b on November 06, 2023, 09:16:35 amI was told that Tektronix used APPA, also in Taiwan, for manufacturing these multimeters.

author: EEVblog
author_rank: Unknown
timestamp: November 19, 2023, 11:21:48 pm
content: Quote from: flash2b on November 06, 2023, 09:16:35 amI think you are right. That jogged my memory and I now reall being told this way back.
What is the number of the episode of an LED lamp that can not be turned off .... - Page 1
Forum section: electronics / general

author: Tarik
author_rank: Newbie
timestamp: October 15, 2023, 03:21:21 pm
content: ... due to a cable that was too long, acting as an antenna ?I am in a discussion about magical energy generation coming from the universe and I want to show/explain that there are simple things behind it, no magic is required and anyone can do/test at homeThanks!Tarik
Smeg Oven Goes Clunkedy Clunk + Capacitor Go Poop - Page 1
Forum section: electronics / general

author: Saronni
author_rank: Contributor
timestamp: October 02, 2023, 09:41:53 pm
content: https://youtu.be/1ngqB4mxZOI?si=a-ispgR7Os__OhgYLooks like the same control board on our Smeg DOA330X1 double oven.We had the F03 error but a different cause. In our case, during the power-on doorlock test, the oven was failing to detect the door as closed because of an intermittent door switch. When we get the F03 error now we repeatedly activate the door switch by hand until the oven light comes back on. We only worked that out after paying $$$ to have the control board replaced. We kept the old control board and found a high ESR capacitor so decided to re-cap the whole board and keep as a spare.

author: janoc
author_rank: Super Contributor
timestamp: October 02, 2023, 10:59:39 pm
content: Kitchen appliances branded "SMEG" don't seem to be a good idea(for reference:https://reddwarf.fandom.com/wiki/Smeg)*ducks*
EEVblog 1551 - DESTROYED Ukrainian Starlink PCB! - Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: July 03, 2023, 01:50:24 pm
content: Looking at a Ukrainian Starlink dish PCB that was DESTROYED by shrapnel!https://olegkutkov.me/https://twitter.com/olegkutkovhttps://radionavlab.ae.utexas.edu/wp-content/uploads/2023/01/starlink_structure.pdfhttps://www.theverge.com/2021/11/11/22776563/spacex-starlink-rectangular-dish-router-mounting-internet-satelliteshttps://i.blackhat.com/USA-22/Wednesday/US-22-Wouters-Glitched-On-Earth.pdfhttps://cdn.intechopen.com/pdfs/37016/InTech-Antenna_designs_with_electromagnetic_band_gap_structures.pdfhttps://onlinelibrary.wiley.com/doi/epdf/10.4218/etrij.2017-0197Signal Path Starlink analysis:00:00 - Ukrainian Starlink dish PCB that was DESTROYED by shrapnel!15:18 - Snaptron Solderable PCB Domeshttps://www.snaptron.com/

author: Bzzz
author_rank: Contributor
timestamp: October 01, 2023, 11:21:37 am
content: Regarding the business card idea: They probably thought about this and already opted for a non-standard frosted plastic card, but never went with a full PCBGive Brian a call, he's a genuinely nice fella that invited us for a quick demonstration of their test gear a couple years ago, after visiting the electronica product show.
How to revert back to phone screen for eevblog - Page 1
Forum section: electronics / general

author: connectTek
author_rank: Regular Contributor
timestamp: September 25, 2023, 11:50:30 am
content: Occasionally I accidentally hit desktop screen on my phone for eevblog, very frustrating !.How do I revert to the more user friendly phone mode without deleting my google history?

author: thm_w
author_rank: Super Contributor
timestamp: September 25, 2023, 09:33:14 pm
content: If you just clear the last 15mins of history under Settings -> Privacy and security, after going to the full site, does that work?

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 25, 2023, 09:40:20 pm
content: Switch by simply clicking one or another.Once you click, the setting is automatically saved.Set Full ViewSet Mobile View

author: Shonky
author_rank: Frequent Contributor
timestamp: September 25, 2023, 09:43:02 pm
content: Right down the bottom of the full page there are links in dark blue on the dark background for Mobile and Mobile. Hard to see unless you zoom in. They seem to result in the same thing.Deleting your Google history won't work. Nor will deleting your browser history. You need to clear cookies if anything but just use the links.

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 25, 2023, 09:45:50 pm
content: Quote from: Shonky on September 25, 2023, 09:43:02 pmHoly crap that required a lot of zoom!

author: connectTek
author_rank: Regular Contributor
timestamp: September 26, 2023, 08:38:45 am
content: Thanks guys, it sure is a big zoom, can dave make this clearer?.Thanks again.
EEVblog 1566 - Rigol DHO800 12 Bit Oscilloscope FULL REVIEW - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 22, 2023, 10:46:14 pm
content: Has the new Rigol DHO800 and DHO900 oscilloscope changed the game in low end scopes?Starts at $299 with 12bit ADC, HDMI, VESA mount, and USB-C power.Forum:00:00 - History of game changing Rigol Oscilloscopes03:27 - All the DHO1000 and DHO4000 goodness05:14 - Compared to the DS1054Z05:52 - The DHO90006:38 - Unboxing07:07 - Liteon USB-C PSU07:30 - It's TINY!08:42 - VESA mount & Fan Noise09:08 - HMDI, touch screen, and mouse10:41 - USB-C physical connection11:25 - External battery power11:45 - The couch feet12:01 - The boot time is not great12:10 - Micro SD card Android O/S12:36 - 7" Capacitive touch screen13:36 - The LED's aren't great13:52 - Knobs14:32 - The SMELL15:01 - Sample rate and memory depth QUIRK16:34 - A wasted button, and the Rigol Menu17:13 - Measurements18:11 - Trigger capability18:36 - Vertical menu system19:51 - It's basically a $299 DHO400020:23 - DS1054Z size comparison21:54 - Built down to a price22:29 - 12 bit is great, but why not Eres?22:57 - Waveform update rate TESTED24:49 - It does drop25:09 - And it's impressive again25:45 - Waveform window organisation26:52 - Alias test27:05 - The FFT waveform updating is impressive28:04 - Peaks would be nice28:16 - Can I have snappy cursors please28:48 - A little bit annoying29:01 - 12 bit FFT test FAIL32:01 - FFT noise floor32:15 - Siglent 1104X-E FFT and R&S MXO4 FFT comparison33:17 - The pulse response TESTED33:45 - Front end noise TESTED35:12 - Input microphonics TESTED35:27 - Here's the money shot, the 12bit ADC resolution36:22 - Vertical range BUG37:19 - QUICK button and screen capture38:22 - Date and Time is overrated38:42 - RECORD mode, waterfall, mosaic, adjacent and perspective displays43:00 - DVM44:05 - Windows44:53 - UART Serial decoder46:27 - CRASH!47:38 - SPI bus decoding47:56 - Input Floating and Ground Connection48:42 - Does the 12 bit give you more dynamic range?49:31 - Display BUG or QUIRK?50:10 - The DS1054Z Help system is still better51:25 - Remote LXI LAN TESTED53:47 - The probes are AWESOME! - Shootout with Siglent56:49 - Conclusion

author: EEVblog
author_rank: Unknown
timestamp: September 22, 2023, 10:54:30 pm
content: To keep all the chat in one place, go here:https://www.eevblog.com/forum/testgear/rigols-new-dho800-oscilloscope-unbox-teardown/
ferrite bead, choke and inductor - Page 1
Forum section: electronics / general

author: matrixofdynamism
author_rank: Regular Contributor
timestamp: September 16, 2023, 10:27:54 pm
content: The ferrite bead and choke are components that have inductance. This means that they have higher impedance at higher frequencies and this is why they are used. What is not clear is, why we have different terms ferrite bead and choke when we should just call them inductor.I have searched youtube but not found any video on topic of ferrite bead and chokes and the different ways to use them and the different packages and shapes they come in and, what is the difference between them and inductor. It would be great if Dave made a video on this topic.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 16, 2023, 11:00:09 pm
content: For reference:https://electronics.stackexchange.com/questions/681748/why-dont-we-call-ferrite-bead-and-choke-as-just-an-inductorTim

author: coppercone2
author_rank: Super Contributor
timestamp: September 16, 2023, 11:37:43 pm
content: its more like a resistor and a inductor

author: Kim Christensen
author_rank: Super Contributor
timestamp: September 17, 2023, 02:42:32 am
content: Actually, a ferrite bead isn't an inductor until you pass a wire through it.
Big screen touch screen to replace whiteboard - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 16, 2023, 04:52:13 am
content: Opinions please on the big screen touch screen TV to replace my whiteboard.I could have lots of fun with interactive content.I always had this idea since I trialed the 70" TV background and realised that a touch screen would make it more valuable.This recent Saelig video really shows it well. Probably an 80" TV there?I'd almost need two different sizes though, one big enough like the Saelig one to make me appear a decent size overlayed on say a scope screen or website.And another smaller size one similar to my whiteboard which is 40"Thoughts?

author: tszaboo
author_rank: Super Contributor
timestamp: September 16, 2023, 05:03:58 am
content: We have a few Samsung Flip at work for videoconf and as a whiteboard replacement. It's not particularly smart, but also not very intrusive. And right now it's half price here, that's actually not very expensive. You should definitely try it before committing to a purchase. Also, figure out what features you want, because video recording of the whiteboard might be tricky.

author: EEVblog
author_rank: Unknown
timestamp: September 16, 2023, 05:27:34 am
content: Quote from: tszaboo on September 16, 2023, 05:03:58 amIt would just be a monitor, so would use my normal PC recording setup.

author: tszaboo
author_rank: Super Contributor
timestamp: September 16, 2023, 05:40:48 am
content: Quote from: EEVblog on September 16, 2023, 05:27:34 amThe drawing is like an extra layer on top of what is displayed. So it doesn't go to the computer. Or you use it as a touchscreen input for your computer. I'm not even sure if it can do both at the same time.But the drawing part is great, it comes with a passive stylus, it draws differently depending on how you hold it, erase with the back side or your fingers. I think it has magnets inside.So really try it before buying, see if your intended usage even works.
EEVblog 1563 - New $389 12bit Rigol DHO800 Scope TEARDOWN - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 06, 2023, 01:26:37 am
content: Teardown of the new $389 12bit Rigol DHO800 oscilloscope!00:00 - Rigol's NEW $389 DHO800 12 bit Oscilloscope!02:43 - USB-C Powered03:19 - Teardown of the Small Sparrow, and the DHO90006:39 - Heatsink Removed and cost reduction08:01 - Is the USB-C connector robust enough?11:25 - Plastic moulding12:13 - Back side of PCB12:48 - PCB Comparison with HDO100013:56 - The ADC15:13 - What is the missing memory?15:42 - BOM cost INCREASE? Why?16:40 - Bypass caps WTF. Madman Muntz is turning in his grave!17:42 - Front end comparison with DHO1000 and HDO400020:00 - The Logic Analyser21:15 - The Arbitrary Waveform Generator option in the DHO90022:39 - PCB summary, and Dave doesn't allow this type of production engineering!22:31 - Serial boot dumping25:56 - The boot Android O/S micro SD card27:15 - Power consumption and summary

author: EEVblog
author_rank: Unknown
timestamp: September 06, 2023, 01:27:38 am
content: Boot dumps text files.

author: EEVblog
author_rank: Unknown
timestamp: September 06, 2023, 01:28:11 am
content: I'll lock this thread because there is already an established one here:https://www.eevblog.com/forum/testgear/rigols-new-dho800-oscilloscope-unbox-teardown/

author: EEVblog
author_rank: Unknown
timestamp: September 06, 2023, 02:42:56 am
content: Dump of the RAW SD card:https://www.eevblog.org/files/RigolDHO800-SDcard-dump.zipAnd analysis:https://www.eevblog.com/forum/testgear/rigols-new-dho800-oscilloscope-unbox-teardown/msg5046388/#msg5046388
Fishy - Page 1
Forum section: electronics / general

author: PerranOak
author_rank: Frequent Contributor
timestamp: October 06, 2023, 04:34:32 pm
content: I’ve received email notifications for updates to posts I’m, apparently, following on this site.The thing is, these do not show up on the update page on this site.They are, supposedly, posts by: daviddave2002.I can’t find this member in the list.Fishy.

author: ataradov
author_rank: Super Contributor
timestamp: October 06, 2023, 05:04:33 pm
content: Check the links in the email, do they actually lead to EEVBlog or this is a real phishing?It is a rather interesting phishing idea. Email format from the forum is standard, so it would be very easy to craft a believable phishing email.

author: golden_labels
author_rank: Super Contributor
timestamp: October 06, 2023, 08:34:26 pm
content: You can go to Profile → Modify Profile → Notifications to verify, if you are not actually subscribed to some threads. It’s possible the reply has been removed before you came to check for new posts. I’d say this is the most likely scenario.(1)If it’s not that, verify the link address. If you are reading in plain text, copy the domain name. If you permit HTML, copy the target address (not the one displayed), paste to a plain text editor, copy the domain name. Having that domain name in plain text, compare it with “eevblog.com”. If some letters do not agree (e.g. ‘e’ or ‘o’ have some 1-pixel dot added somewhere, or ‘l’ is actually ‘1’ or some letters are suspiciously uppercase), consider it a phishing attack. If not, the test is inconclusive: you can’t rely on your eyes. Preferably use a computer for comparison: a programming language, Unicode-capable spreadsheet, a diff tool, even calculating hashes.If it’s the same, likelywe have some mystery. Check if the thread with ID/name used actually exists. It’s possible somebody is spamming users to get answer faster.(1)I am not dismissive and it’s very good choice, that you reported the situation. But in practice PEBCAK is more common than attacks. And nobody is immune. We are just humans.
EEVblog 1562 - THE 1980's Boombox TEARDOWN - Sharp GF-7600 - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 27, 2023, 11:56:01 pm
content: Teardown of THE 1980's Boombox / Ghetto Blaster, the iconic Sharp GF-7600

author: .RC.
author_rank: Frequent Contributor
timestamp: August 28, 2023, 03:59:36 am
content: After hearing Dave sing I had a vision of him dropping Sagan off at high school right at the front gates, he winds down the window and in front of the school kids goes to town with his rendition of "The Final Countdown".

author: golden_labels
author_rank: Super Contributor
timestamp: August 28, 2023, 10:47:00 am
content: Traces reproduced in silkscreen is a beautiful thing. Reminds you of the times consumers cared about things being repairable.

author: EEVblog
author_rank: Unknown
timestamp: August 28, 2023, 10:43:37 pm
content: Quote from: .RC. on August 28, 2023, 03:59:36 amI can neither confirm nor deny that's happened.

author: EEVblog
author_rank: Unknown
timestamp: August 28, 2023, 10:44:13 pm
content: OMG!He nailed that!

author: Loz Collins
author_rank: Newbie
timestamp: August 29, 2023, 09:06:06 am
content: AM stereo was an 80's thing, not 90's, remember the radio ads and newspaper advertorials well (yes, I'm old!):
EEVblog 1560 - TIP: Use Your Arb Gen as a High Resolution DC Voltage Source! - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: August 17, 2023, 09:27:12 pm
content: Tech Tip: How to use you Arbitrary Waveform Generator as a High Resolution DC Voltage Source!Siglent teardown:

author: gjvdheiden
author_rank: Contributor
timestamp: August 18, 2023, 03:20:47 pm
content: Nice video.A while ago I digged through as much videos about the Siglent generator as I could find on you channel. The teardown convinced me the most.I remembered from 1 of those videos that you prefer to change the load / output impedance setting by holding the "output" button above the BNC connector and the Siglent couldn't do that. Maybe it was a software version thing, because mine does exactly that and the video is from the first release back then.Likely this is redundant info for you, but I saw you pushing through the menu doing that. That output button isn't really easy accessible with a T connector / splitter in the way.

author: Fran_PSR
author_rank: Newbie
timestamp: August 19, 2023, 09:03:19 pm
content: Good morning, as always a splendid informative and above all interesting video, thank you very much David. Taking advantage of the topic, I have a problem with a similar generator model but with 80MHz with the possibility of loading waveforms from USB or from PC. I have a need that I can't solve and in the following: I can't find any file with a signal pattern of video color bars in CVBS format similar to those offered by the old TV signal pattern generating equipment to perform calibrations. I have searched the internet and I also consulted the manufacturer, unfortunately I did not get an affirmative answer. Do you know if there is a similar file?Thank you
EEVblog 1554 - Optometrist AutoRefractor Keratometer TEARDOWN! - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: July 20, 2023, 10:01:13 pm
content: A teardown of a very interesting bit of optometry kit, a Shin Nippon NVISION K-5001 RefKeratometer (Auto Refractor Keratometer).It can measure the curvature of your cornea, and well as refractive error to diagnose near and far sightedness.Links:https://www.rexxam.co.jp/themes/eye-care/products/images/nvk5001/NvisionK5001.pdfhttps://www.academia.edu/59315264/Clinical_Evaluation_of_the_Shin_Nippon_NVision_K_5001_Grand_Seiko_WR_5100K_Autorefractorhttps://www.opticsforhire.com/blog/keratometer-optical-design/Manual:https://www.yumpu.com/en/document/read/25018677/english-manual00:00 - What is an AutoRefractor Keratometer?03:41 - Don't try this at home kids! Can Dave measure his eyeball?06:17 - Teardown08:14 - Pupil distance measurement09:43 - Should have read the manual...11:22 - How the Keratometer mire circle is generated13:42 - Optical path and lenses15:47 - The camera16:53 - Fine auto-focus mechanism18:22 - Main PCB
EEVblog #384 - Agilent 4000X Oscilloscope Teardown - Page 1
Forum section: electronics / general

author: nitro2k01
author_rank: Frequent Contributor
timestamp: November 13, 2012, 06:51:50 pm
content: It's subtle, but I noticed you kept the video speed-up going through the boot process. And it still feels like it's taking forever.

author: SeanB
author_rank: Super Contributor
timestamp: November 13, 2012, 07:37:47 pm
content: 4 channel USB hub with one connected to the touchscreen.

author: kg4arn
author_rank: Unknown
timestamp: November 13, 2012, 10:58:11 pm
content: What's the switch for (S3400) @ 8:03?OOPS I see it now on the back panel of the scope.

author: JackOfVA
author_rank: Unknown
timestamp: November 14, 2012, 06:40:37 pm
content: Is the reason for a higher quality time base to improve the jitter, not overall frequency accuracy? The worse the clock jitter the more trace to trace dispersion - maybe not important at 1 MHz but at 300 MHz a cycle is 3.3ns, so a jitter of 33 ps would cause 1% trace to trace shift.Or is there some magic software inside the DSPs that averages out or compensates in some other fashion for time base jitter?Jack

author: ejeffrey
author_rank: Super Contributor
timestamp: November 15, 2012, 07:47:21 am
content: Quote from: JackOfVA on November 14, 2012, 06:40:37 pmMaybe they decided that since they were adding the 10 MHz out it would be embarrassing if a $20k scope had a really crappy reference output

author: wrieken
author_rank: Contributor
timestamp: February 13, 2019, 04:59:31 pm
content: Hi,Does anyone here know what probes are good (non-Keysight) for the Keysight MSOX4054A 500Mhz version?Thanks,William

author: albertr
author_rank: Regular Contributor
timestamp: December 02, 2023, 02:43:58 am
content: Anyone knows the location for TX/RX pins of the serial UART used as a boot console on 4000X series scopes?Thanks,-albertr
an Electronics Show in Sydney as an Event - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: July 22, 2023, 04:53:30 pm
content: for Dave - the Amp Hour in-reply to "where is an electronics club-or show in Sydney?"in my opinion the best way to start an electronics club-or show is to piggyback on the back of an existing show or event!example anAmateur Radio hamfestin the Sydney metropolitan area.radio amateurs will buy swap sell almost anything electronics at a hamfest!so set up a sellers table, and flog off some of your ex-mailbag electronics now cluttering the lab. = cash in the hand!radio amateurs will buy anything electronics not just used radios. vintage computers, video games ,test equipment.then You try to get on the program as a guest speaker speaking about.? say vintage computers or electric vehicles or test equipment or starting your ownelectronics lab. in time as the word gets out more and more will show up for you. growing the event.the event management will be happy with this. free promotion for you too.try this link for Amateur Radio hamfest'shttps://www.wia.org.au/members/broadcast/wianews/

author: EEVblog
author_rank: Unknown
timestamp: July 27, 2023, 01:04:05 pm
content: Yes, i have sold stuff out of my car boot at a hamfest.The wyong field day is the only one in my state that I am aware of, and they don't have talks, it's just stalls.I know that some people in Australia tacked on an open source hardware thing to the existing yearly Linux conference and that worked fairly well.
EEVblog 1549 - Mailbag Teardown Art, USB Power, and Multimeter - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 20, 2023, 11:28:26 pm
content: In this mailbag we take a look at some teardown artwork, USB power monitors, and a USB rechargeable multimeter.Grid Studios Teardown artwork:https://gridstudio.cc/FNB58 USB power monitor:https://s.click.aliexpress.com/e/_Dlc6MlJFNB48P:https://s.click.aliexpress.com/e/_DlifLtxhttps://ultraonedesign.com/Fnirsi S1 Multimeter:https://s.click.aliexpress.com/e/_DC2hz2H00:00 - Mailbag00:31 - Grid Studio Teardown artwork06:06 - Fnirsi bonanza07:46 - USB Power monitors FNB58 and FNB48P12:01 - The uSupply makes another appearance16:29 - UltraOne Design Binding post to Banana post adapters19:32 - Fnirsi S1 USB Rechargeable Multimeter
Fluke 93 50 MHz scopemeter Service manual needed(version with the 6 LCD chips) - Page 1
Forum section: electronics / general

author: MostlyHarmless
author_rank: Newbie
timestamp: August 29, 2023, 01:04:12 am
content: I have a fluke 93 50 MHz scopemeter which does not power up, I am trying to find the correct version of the manual as my unit has an A1 Digital board with the six LCD driver chips as in your picture and not the 5 chip board as seen in the only versions of the service manual I've found online so far.i need the correct version to allow me to troubleshoot the On/Off circuit, I have high hopes as when probing with my oscilloscope i must have pulled something low that turned the unit on (just once and I cant replicate whatever I did)Does anyone have the full service manual and the layout diagrams and circuit descriptions for the fluke 91/93 with the A1 board with the 6 LCD driver chipsthis pic is from another post 10 years ago so i know its out there somewhere and would love any help to find it
EEVblog 1476 How does the resistance multiplier work? - Page 1
Forum section: electronics / general

author: ballsystemlord
author_rank: Frequent Contributor
timestamp: May 12, 2023, 07:04:46 pm
content: Hello,I recently watched Dave's tutorial and teardown of this thing:https://www.youtu.be/JDXKrXJloSwAnd I'm really confused as to how that one knob changes the resistance by an order of a magnitude or more. Dave didn't go into details on it either.For example, if I have a switches with 1s, 10s, and 100s of ohms resistors, then the maximum resistance I can create is 999 ohms. If I have another switch that has a 1Kohm, 10Kohw, and 100Kohm, resistors in it, than switching it from a series short to a 1Kohm range would give me a maximum resistance of 1,999 ohms. Not 9,990 ohms.How does the resistance multiplier work?Thanks!

author: AVGresponding
author_rank: Super Contributor
timestamp: May 13, 2023, 01:28:55 pm
content: Quote from: ballsystemlord on May 12, 2023, 07:04:46 pmIt doesn't multiply the resistance; it changes the resistance ratios on opposite sides of the bridge. I recommend reading the manual, it can explain it better than I can. Drawing out a simplified version of the circuit for each multiplier range would probably help too.It's interesting to note that it also doesn't use "true" (ten) resistor decades, but BCD decades, which use only 4 resistors to achieve each of the 10 values per decade.
My Messages [1] <-- does not go away! - Page 1
Forum section: electronics / general

author: Bicurico
author_rank: Super Contributor
timestamp: May 07, 2023, 03:09:23 pm
content: Hi,Sorry, I don't know where to post this.Yesterday I received a PM and something got broken, because the main window keeps showing "My Messages " and asks me if I allow to open the message. Even after reading the message and without having any unread message, this remains as is.I tried clearing the browser cache, tried a different browser, a different computer. The same happens on my phone with Chrome and Firefox.Not a huge problem, but irritating never the less.What could be the origin of this?Thanks,Vitor

author: Bicurico
author_rank: Super Contributor
timestamp: May 07, 2023, 07:27:50 pm
content: Fixed it by sending a message to myself...
EEVblog1541 - What is this Blown SMD Component? Redux - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 01, 2023, 10:42:47 pm
content: Searching for another blown SMD component.Twitter thread:https://twitter.com/PoiSolutionsLLC/status/1652769442080620549https://datasheet.lcsc.com/lcsc/2001131003_Shikues-BRCL3130ME_C475652.pdfhttps://datasheet.lcsc.com/lcsc/2201121900_Shikues-SKCL3130ME_C2941741.pdf

author: CChin254
author_rank: Regular Contributor
timestamp: May 02, 2023, 02:51:15 am
content: Looks similar to the ICs used for battery protection in the Hantek TO11 LCR Meter.Photos from VoltLog.

author: Kleinstein
author_rank: Super Contributor
timestamp: May 02, 2023, 06:33:13 am
content: For the difference between the 2 chips I would expect details in the parameters, like the maximim current or voltage limits for a different battery size or chemistry or priority. So the difference may matter.Usually the datasheets will tell what codes are printed to the chips. This could be relevant for the details, like the 2 (maybe more) variants.Another way to find a chip is a database of the SMD chip codes.The google search tends to remember past results. So first finding and clicking the right search result may have brought it high in the ranking for the following search. So without the earlier search with more keywords the same file may not show up that early with the simpler search.

author: Rdx
author_rank: Contributor
timestamp: May 02, 2023, 03:22:07 pm
content: I remember that Adobe Acrobat used to have a function to compare two PDF files. Like it gave you a nice report of all the differences found. Not only in text but also in images.Mustve been Acrobat Pro, so not the free Reader but the one that you have to pay unreasonable amounts of money for.

author: thm_w
author_rank: Super Contributor
timestamp: May 02, 2023, 09:00:50 pm
content: Quote from: Kleinstein on May 02, 2023, 06:33:13 amThe different in the part number is at the beginning, usually any voltage/current/etc setpoints will be at the end. eg: 3130-3.3, 3130-4.0 or whatever.In this case the reason for the different part numbers is a different manufacturer name:"FoshanBlueRocket ElecBRCL3130ME""ShikuesSKCL3130ME"Quote from: Kleinstein on May 02, 2023, 06:33:13 amThe guy who asked this question couldn't be assed to listen to the advice in the last vid. Searching "sot23 3130" will bring it up for anyone as the first result.

author: alpher
author_rank: Frequent Contributor
timestamp: May 02, 2023, 11:31:41 pm
content: EEVblog1541 ?c'mon.

author: EEVblog
author_rank: Unknown
timestamp: May 03, 2023, 01:23:49 am
content: Quote from: thm_w on May 02, 2023, 09:00:50 pmIn this case both datasheets use the Shikues branding though.

author: thm_w
author_rank: Super Contributor
timestamp: May 03, 2023, 10:13:33 pm
content: Quote from: EEVblog on May 03, 2023, 01:23:49 amCould be some alternate supplier naming thing or something LCSC wrote up, not sure. Here is the blue rocket branded datasheet:http://www.fsbrec.com/pdf/BRCL3130MC.pdfI trust them more based on the cool branding
EEVblog 1536 - How to find a $50 Oscilloscope on Ebay - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 06, 2023, 05:54:38 am
content: Can we find a decent $50 analog oscilloscope on ebay?What about a decent digital storage oscilloscope for less than half the price of a new Rigol?
EEVblog 1533 - How To Estimate Product Battery Life - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 09, 2023, 10:30:32 pm
content: How to estimate the battery life of a product. In this example, the BM786 multimeter.How to measure battery current accurately, avoiding Burden voltage, and looking at battery datasheets characteristic curves. The difference between alkaline and lithium primary batteries.

author: pdenisowski
author_rank: Super Contributor
timestamp: March 10, 2023, 10:54:05 am
content: In my experience, a lot of engineering students and young engineers don't appreciate and/or don't understand the importance of battery life testing -- despite the fact that so much of their world actually runs on batteries -- so this is a very timely and useful video. Thanks!(and nice power supply)

author: Kleinstein
author_rank: Super Contributor
timestamp: March 10, 2023, 12:37:38 pm
content: Even with alkaline cells there is not that much energy left at low voltage. If one would want to use a alkaline cell to a lower voltage one may need 1 more cell. In the current example 4 cells would allow 0.9 V per cell to get the same final 3.6 drop out point, but one kind of wastes the energy from 1 more cell. So the 1.2 V final voltage is not such a bad choice.With a linear regulator and a fixed min voltage getting the ideal final voltage is a little similar to the maximum power point of a solar cell. Depending on the voltage chosen one gets a different capacity / current and there is a point of maximum power / energy.Going at least down to 1.2 V allows to use NiMH or NiCd cell.This gets very anoying when the drop out is higher (e.g. 1.4 V in some cases).Extrapolating to lower current draw is relatively easy, as the low currents the batteries are usually well bahaved. So there is a capacity for low currents and than a drop at the higher current end.So for the 5 mA load using 2 times the time for 10 mA load is a good approximation. So no need to really extrapolate the curve.

author: f4eru
author_rank: Super Contributor
timestamp: March 10, 2023, 09:14:36 pm
content: What? no use nor mention of the uCurrent, while explaining burden voltage ?I'm afraid I can't let you omit that dave

author: thm_w
author_rank: Super Contributor
timestamp: March 10, 2023, 09:59:39 pm
content: Quote from: f4eru on March 10, 2023, 09:14:36 pmIt was there, you must have mentally blocked it out.

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 11, 2023, 12:37:15 am
content: He even talked about the "low burden" 121GW, so promotion for two items.

author: mwb1100
author_rank: Frequent Contributor
timestamp: March 11, 2023, 02:07:51 am
content: Of course there's also the star of the show, the BM786! I've got one, and love it.Even if 120-150 hours of battery life isn't stellar (Fluke claims 400 hours for the 87v on one 9V), 3 AAA's cost less than a buck so I'll manage.
EEVblog2: EcoFlow Delta Pro Battery Capacity TESTED - Page 1
Forum section: electronics / general

author: ticpu
author_rank: Newbie
timestamp: March 08, 2023, 03:32:04 am
content: I wanted to do a drain/charge cycle since that video and to y surprise, the breaker where the EcoFlow is plugged has tripped. By the way, my pack is about a year old.First thing I noticed, my PC (the inverter) has shut off at about 1%, didn't keep going at 0%.According to the EcoFlow's sensors, doing an integral of the voltage of the battery * how many amps is going thru the BMS for the charge period would give me around 3400 Wh.Here are the graphs.Watt hours calculation:Voltage + Amps graph over the charge period.Various graphs over the discharge+charge cycle.
End of Support for the 121GW? - Page 1
Forum section: electronics / general

author: Ro Max Well
author_rank: Newbie
timestamp: March 04, 2023, 10:38:50 pm
content: Hi all,i just had received my 121 GW Multimeter when I stumbled over the newest commit in the gitlab for the 121GW's Multiplatform App:User Dave added to the Readme File:QuoteSo what does that mean? Is the 121GW phasing out? Or is it just the specific implementation, that is not continued? Is there any statement by Dave?Best regards,Robert

author: thm_w
author_rank: Super Contributor
timestamp: March 06, 2023, 10:11:54 pm
content: The guy that was working on it (David L.) does not work for Dave any more. So that is why I wouldn't expect updates.Why he added the readme, no idea, maybe lots of people were asking him what the latest version is.
Pylon tech UP 5000 LI ION BATTERY (DIP SWITCH SETTINGS) - Page 1
Forum section: electronics / general

author: WiredSmart
author_rank: Contributor
timestamp: March 05, 2023, 01:54:17 pm
content: Could someone explain how the dip switch settings work when adding more batteries to a battery bank. The operation manual does not go into detail .I would like to know what combination do you set the master and the salves in different scanerios etc.What do the dip switches actually do ?What setting do you use with a single battery, x2 batteries, x3 batteries ...?
EEVblog BM235 Multimeter Carry Case & Accessories - Page 1
Forum section: electronics / general

author: ndzied1
author_rank: Contributor
timestamp: December 06, 2019, 07:32:34 pm
content: Hi there,Do you know if the EEVblog BM235 Multimeter Carry Case & Accessories will be re-stocked at Amazon/USA any time soon?Thanks,nOrM======================nOrM=Norman Dziedzic Jr.I've never been to China but my phone has.

author: TomKatt
author_rank: Frequent Contributor
timestamp: February 08, 2023, 12:11:50 pm
content: Just purchased the BM235 via Amazon (US location)... These were out of stock for a bit and recently just got replenished.Any chance the case + accessories will be back in stock at some point? I note the case is still out of stock in the official eevBlog store, and I don't see any listing for the accessories...Seems like there'd be a lot of demand for these! One way or another I'll get a case and the alligator clips, but the magnetic hanger is virtually impossible to source in the US and it would be nice to have the matching set if possible.On a side note - I use magnetic straps all the time, and Brymen's string design seems really quirky. What a strange design choice to use a string instead of the conventional nylon strap used by everyone else... Seems like the string would be more susceptible to damage being dragged over sharp edges?Thanks!Edit - Just received my BM235It's tinyEspecially compared to my Greenlee DM820A (aka Brymen 827S). But I can see how having a small meter will be handy on a crowded (messy) bench lol.And that "no BS packaging" is exactly that lol - I thought I received the wrong item from Amazon when I opened the Amazon pouch - a plain unmarked white box barely bigger than the meter itself and I thought for sure that couldn't be the meter.