hybridfree/eevblog-posts huggingface dataset:
Request for youtube video on custom driver and controller for analog RGB LCD - Page 1
Forum section: electronics / general

author: bteddy
author_rank: Newbie
timestamp: July 03, 2022, 08:34:00 am
content: Hello,Request for Youtube video on custom driver and controller for analog RGB LCD.Like what was done in EEVblog #1055, EEVblog #1074, and EEVblog #1105.I'm a Newbie with a box of LCD screens most are ### X 3 X ### (A-Si TFT active matrix).Here is the datasheet of one: See attachment.It is a 7", 480x3x234, A-Si, TFT, Active matrix, RGB stripe, white transmissive LCD.I would like the video on how to design a custom driver and controller for the one attached, to learn what/how to for the others. So I can connect them to the GPIO on Arduino, Raspberry pi, and Beaglebone Black projects.If I have this right, the "3" in "480x3x234" is for RGB. Which, from the datasheet, are analog. It has a 26-pin flat cable and a 2-pin power for backlight. Again if I have it right, the driver (discrete logic or FPGA) is between the LCD and the controller which is the interface to the GPIO on Microcontroller, computer or SBC. rignt?If that could be done, I would be so grateful.Thank You
Request for video interview with Sophia and what consciousness is? - Page 1
Forum section: electronics / general

author: cdev
author_rank: Super Contributor
timestamp: April 07, 2022, 02:14:08 am
content: Request that you do a video interview with Sophia, of Hanson Robotics.

author: Scherms
author_rank: Regular Contributor
timestamp: June 21, 2022, 02:14:04 pm
content: Put this girl in a faraday cage and see how she performs then...
An idea for an episode - Page 1
Forum section: electronics / general

author: Fungus
author_rank: Super Contributor
timestamp: June 17, 2022, 10:10:36 pm
content: Not exactly test gear or soldering irons, just something that came to mind after I went down a rabbit hole of trying to understand why E=M.C^2.My thinking was that C^2 is a constant so why include it? Was Einstein just fond of C? Why didn't he use 3.142 squared instead? Pi would also work for suitable units of mass. Why not just specify either mass or energy in a more suitable unit and eliminate the C squared "fudge-factor"?Then again, the fact that the "fudge factor" isprecisely"the speed of light squared" is much too big a coincidence to ignore. Why do completely arbitrary man-made units like 'seconds' and 'meters' turn into a perfect equation? It can't be dumb luck.That's where the quest for enlightenment started...It turns out that Watts are derived from joules, the joule is derived from kilograms and meters, the amp is derived from the joule, the Ohm is derived from the Amp, the Volt is derived from the Ohmandthe Amp, the Amp is also a Coulomb and was defined in terms of micronewtons/meter, both of which are derived from kilograms, and.... the whole thing goes around and around and around in circles when you start to look up the definitions.Which came first, the Volt, the Coulomb or the Ohm? Was it the Ampere or the Watt? Chicken or egg? Are they allreallyderived from Kilograms and meters? It turns out that one coulomb into one Ohm is the same as applying one Newton to 1kg of mass, how doesthatwork?Might make a fun video.https://en.wikipedia.org/wiki/Coulomb#Definitionhttps://en.wikipedia.org/wiki/Joule#Definitionhttps://en.wikipedia.org/wiki/Ampere#Definitionhttps://en.wikipedia.org/wiki/Volt#Definitionhttps://en.wikipedia.org/wiki/Ohm#Definitionhttps://en.wikipedia.org/wiki/Joule#Definitionhttps://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalenceAnd ... if you don't know why E = MC^2 then it's worth figuring it out. The equation takes on a whole new meaning when you know why.
EEVblog 1475 - SMD Part Indentification & Substitution Search - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 26, 2022, 10:33:39 pm
content: Answering another viewer question. Can we identify or find an alternative for this SMD part?https://twitter.com/PoiSolutionsLLC/status/1529065036433571840

author: gamalot
author_rank: Super Contributor
timestamp: May 28, 2022, 12:04:39 pm
content: I have only seen some parts of Diodes with such a marking pattern, 5 alphanumerics, no other elements, not even the dot for pin 1.

author: RES
author_rank: Regular Contributor
timestamp: May 30, 2022, 02:51:20 pm
content: Maybe a factory production device? For example Ricoh has this dc/dc (SMD code ending at 3q)3Q R1210N231A Ric SOT-23-5 PWM step-up, 2.3V, 35..100kHzFound via this SMD markings code site:http://www.smdmarkingcodes.com/Index/search?p=2&xuanze=1&markingcode=3q&baohan=2&fenzuan=0

author: thm_w
author_rank: Super Contributor
timestamp: May 30, 2022, 09:14:12 pm
content: Quote from: RES on May 30, 2022, 02:51:20 pmIt looks like they use a 4 digit code:https://pdf1.alldatasheet.com/datasheet-pdf/view/216239/RICOH/R1210N231A.htmlBut there are so many datasheets that don't even mention a package marking at all. Or custom code for automotive, who knows.

author: manu
author_rank: Regular Contributor
timestamp: June 01, 2022, 07:08:47 am
content: Hello,I read from the original tweet that the ic could be identified. But, for my curiosity, what is the part number?

author: thm_w
author_rank: Super Contributor
timestamp: June 01, 2022, 09:41:31 pm
content: Quote from: manu on June 01, 2022, 07:08:47 amThey did not say it could be identified, just "figured it out" with Daves help, so presumably what replacement part could be installed.
404 errors on early EEVBLOG videos - Page 1
Forum section: electronics / general

author: ve7vie
author_rank: Contributor
timestamp: June 02, 2022, 02:46:54 pm
content: Specifically 6, 13, 75 and 137. But 26 IS accessible. Have some videos been removed? Or maybe they are on some secondary storage somewhere....

author: ve7vie
author_rank: Contributor
timestamp: June 16, 2022, 03:00:09 am
content: Just took a closer look. It seems that almost all podcasts before #500 give 404 errors. There are some older reviews I would really like to see. Wayback Machine?
EEVblog 1476 - Keithley 515A Wheatstone Bridge TEARDOWN & TUTORIAL - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 03, 2022, 12:39:42 pm
content: Teardown of the Keithley 515A Megohm Wheatstone bridge, plus a tutorial on how Wheatsone bridges work and their applications.Manual & Schematic:https://download.tek.com/manual/515A(Model515A).pdf1960's Daven precision resistor and attenuator catalog:http://www.technicalaudio.com/pdf/Daven/Daven_attenuator_switch_lab_Catalog.pdfKeithley electrometer teardown:00:00 Keithley 515A Megohm Wheatstone bridge03:50 - The Magic smoke test04:00 - Zero check test04:40 - Standardise calibration step05:30 - Range calibration06:21 - Measuring a 200M resistor09:41 - Confirmation with a Keithley DMM7510 7 1/2 digit multimeter10:37 - Weatstrong Bridge Tutorial14:55 - Gaurd traces for high impedance measurement16:22 - Teardown28:25 - OUCH!

author: PartialDischarge
author_rank: Super Contributor
timestamp: June 03, 2022, 01:16:18 pm
content: I find it surprising that that resistor changes that much with only a 90V increase. The voltage coefficient is usually very low in that range, maybe some ppm per volt

author: free_electron
author_rank: Super Contributor
timestamp: June 03, 2022, 04:06:55 pm
content: That input fet is made byhttps://www.linearsystems.com/i (probably) have the last 3 in existenceI repaired two of these years ago and they only had 5 of these fets in stock and i bought them all. 2N5904 or 2N5907. there is a whole range of these fets. depending on what model electrometer you have they use one or the other.

author: EEVblog
author_rank: Unknown
timestamp: June 04, 2022, 12:51:51 am
content: Quote from: PartialDischarge on June 03, 2022, 01:16:18 pmYeah, I was a bit surprised by that. Maybe some non-linearity in the old 515.

author: Kleinstein
author_rank: Super Contributor
timestamp: June 04, 2022, 07:44:54 am
content: For the bridge in storrage for a long time in a possibly slightly damp basement it may take some time to dry up. So nonlineartiy with the 515 is a possible issue. This would effect the reference resistor(s) not the switchable decade resistors.Another point could be some bias current from the null detector. This could be visible when using an external 0 V bridge voltage.

author: free_electron
author_rank: Super Contributor
timestamp: June 05, 2022, 09:19:51 pm
content: -cringe- triaxial bnc ... it's threaded so it should be a TNC (B = bayonet , T = Threaded )
EEVblog 1471 - Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 30, 2022, 10:19:26 pm
content: What's in the Mailbag?SPOILER:00:00 - Mailbag00:41 - Laser etched Delorean Time Machinehttps://momentsetchedintime.com.au/03:29 - Encryption Class C wall mount rack cabinet05:30 - Russian multimeter with a most UNUSUAL range switch!08:44 - Smell'o'vision11:51 - Bob Widlar PCB plaque15:16 - How to get 5 different colours on a PCB19:26 - Mr A.C Coupling TENS unit teardown29:55 - Shannon Tweezers LCR Tweezershttps://www.eevblog.com/forum/testgear/design-a-new-precision-lcr-tweezers/http://shannontweezers.top/36:48 - MYSTERY processor!

author: BreakingOhmsLaw
author_rank: Frequent Contributor
timestamp: May 01, 2022, 09:43:47 am
content: Link to the forum thread with the files for the Bob Widlar PCB:https://www.eevblog.com/forum/projects/the-bob-widlar-commemorative-pcb-(from-mailbag-1471)/

author: thm_w
author_rank: Super Contributor
timestamp: May 05, 2022, 12:54:27 am
content: TENS might be useful for injury, although its not so well studied in humans yet.Basics are still: strengthening exercises, stretching, massage, etc. unless you physically cannot do these things.Other than pain an interesting application is nerve regrowth, which can take years or not happen at all:QuoteI checked the unit I have here:QuoteSimilar waveform to what you measured, positive going pulse then negative going. Can't use even close to 50% power setting as its insanely uncomfortable at that level.BTW the replacement conductive pads are very cheap on amazon, $10 for a set of 10 or so. If you end up liking it.https://www.sciencedirect.com/science/article/abs/pii/S1526590011004445https://www.sciencedirect.com/science/article/abs/pii/S1058274617303166https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5404801/https://pubmed.ncbi.nlm.nih.gov/19682653/https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0233531

author: ve7vie
author_rank: Contributor
timestamp: May 30, 2022, 08:42:19 pm
content: I remember when the blew up the Extech tweezers by plugging it into the mains!https://www.extech-online.com/index.php?main_page=product_info&cPath=78_5_6&products_id=379
Legion 5 Keyboard - Page 1
Forum section: electronics / general

author: msuffidy
author_rank: Frequent Contributor
timestamp: May 12, 2022, 04:00:50 pm
content: Does this help?

author: TheSteve
author_rank: Unknown
timestamp: May 12, 2022, 08:25:27 pm
content: Lenovo generally publishes videos on how to replace any of the hardware in the machines they sell. They also sell parts for pretty much everything.Not many companies can claim such things.

author: eti
author_rank: Super Contributor
timestamp: May 14, 2022, 05:58:14 pm
content: “Legion” …. Lol. A name clearly aimed at kiddies and gamers. Next time you’ll have learnt the lesson, and will buy a ThinkPad. Lenovo consumer grade machines are AWFUL. ThinkPads are used by NASA.Simple. Ask any ThinkPad user. .
CHEAP vs EXPENSIVE Home FID Workout Weight Bench Review - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: May 22, 2022, 06:06:44 am
content: Which is the better value FID adjustable home workout weight bench? A $100 ebay cheapie or a $300 Pro-Form Carbon Strength blade design name brand?FID is Flat-Incline-Decline bench.https://www.proform.com/strength/carbon-strength-adjustable-benchhttps://www.proformfitness.com.au/product/strength/28/proform-adjustable-utility-bench/11602/details00:00 - $100 ebay no-name Genki cheapie FID bench05:33 - Dave's got the wobblies!07:08 - Weight = Quality07:37 - Pro-Form blade design FID bench13:03 - Width matters14:34 - No contest!14:58 - This is a joke, right? 1.5mm tubular steel!16:02 - Review of the Everfit / Bowflex adjustable dumbell sethttps://amzn.to/3lv4bnE18:30 - Summary - Pin design vs Blade design

author: Shock
author_rank: Super Contributor
timestamp: May 22, 2022, 05:00:25 pm
content: It also depends on your body (frame) size and weights. First one is rubbish, second one is a bit small for me but looks decent enough for a home jobbie. It does look a little high for you though tbh, don't want to put your legs up like you're doing pilates.For dumbbell weights I use few adjustable sets of cheap standard weights, considerably cheaper and far less screwing around changing weights over when running multiple sets. If you shop wisely you can setup a pair of 45kg for about $200, extra sets beyond that for convenience are less as you end up with a bunch of smaller weights.For me, more pros than cons. I do have a perfect set in mind one day, but they are hideously expensive.
WiGL Wireless Power BUSTED AGAIN - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: May 11, 2022, 06:06:28 pm
content: if only 1 percent of it works then its a marketing opportunity for some.like buying land on Mars, its all in the future.gullibility has never been more popular.

author: msuffidy
author_rank: Frequent Contributor
timestamp: May 11, 2022, 09:59:27 pm
content: I have been trying to figure out how you could do a wireless power link and came up with some general abstractions.1) The objective is to transfer 'energy' from one point to another point without wires2) There is the tendency of loss through a medium3) It is best to be a tight beam as to not disperse the energy to the surrounding areaSo I was thinking it may be possible to in fact work, as a tight beam that can only be captured with a certain configuration of matter. There may be nothing that fits that definition. If you found a totally good way to capture neutrinos for example that would be an example of a beam of matter that does not lose energy to the transmission medium it passes through.So anything meeting that definition would then probably have possible side effect captures that would make it a health risk.Maybe a non existing spatial portal method could also work.

author: Marco
author_rank: Super Contributor
timestamp: May 11, 2022, 11:00:36 pm
content: You can do it by making the receiver ridiculously big. That's what the theoretical satellite microwave power links depend on. Relatively low power density, bright sunlight level but always there. Doesn't make them practical, just less lethal.
Insteon IoT FAIL - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 19, 2022, 09:10:25 am
content: The Internet of Things company Insteon not only went bust, but their CEO has tried to scrub its history from LinkedIn. Users left in the lurch.https://arstechnica.com/gadgets/2022/04/shameful-insteon-looks-dead-just-like-its-users-smart-homes/https://staceyoniot.com/insteon-is-down-and-may-not-be-coming-back/https://www.reddit.com/r/insteon/https://www.linkedin.com/in/roblilleness/

author: station240
author_rank: Unknown
timestamp: April 19, 2022, 09:24:32 am
content: https://www.iclarified.com/85614/insteon-appears-to-have-abruptly-gone-out-of-business-leaving-customers-in-the-darkQuoteThey moved out 10 days ago, and said nothing.

author: SeanB
author_rank: Super Contributor
timestamp: April 19, 2022, 09:36:43 am
content: Very likely dodging the creditors, who will go after them, along with the IRS as well.

author: amyk
author_rank: Super Contributor
timestamp: April 19, 2022, 01:34:13 pm
content: Insteon? More like InsteOFF now.

author: Bud
author_rank: Super Contributor
timestamp: April 19, 2022, 01:45:36 pm
content: "Pulling the rug" is what this type of exit is called.

author: EEVblog
author_rank: Unknown
timestamp: April 20, 2022, 12:48:42 am
content: There was already a thread:https://www.eevblog.com/forum/chat/what-happens-when-your-cloud-service-just-pulls-the-plug-insteon-gone/
EEVBLOG communication issues. - Page 1
Forum section: electronics / general

author: v81
author_rank: Regular Contributor
timestamp: April 02, 2022, 05:42:57 am
content: Been trying to make contact with EEVBLOG regarding purchase / availability for Multimeter cases.Emailed eevblog.official@gmail.com on 2nd Feb and 10th FebEmailed dave@eevblog.com on 2nd MarchNo replies from any.If Dave is able to check-up on this, from domain contained 'lol.com' + the above dates should narrow it down.

author: thm_w
author_rank: Super Contributor
timestamp: April 04, 2022, 08:54:20 pm
content: This one?https://www.eevblog.com/product/bm235-case/Says out of stock.

author: v81
author_rank: Regular Contributor
timestamp: April 05, 2022, 01:35:35 am
content: Yeah, i can see that.Curious to know is it restocking in a week or a month or 3 months... or never.

author: Barny
author_rank: Frequent Contributor
timestamp: April 07, 2022, 10:34:38 am
content: Mr. EEVblog gets hundreds E-Mails a day and he is a one man show.I think it isn't a good idea to try to order per E-Mail because at this mass of mails, your order gets easy overlooked.I suggest to use the shops to other the EEVblog DMMs ( Amazon / EEVblog web shop)Due to global shortages in electronic components, plastic pellets, .... and a little bit of pandemic its not easy to get parts.For example, we have two halls and the whole back yard (with tents) full of halve finished products because we can not get all parts to finish our products.I think you should check from time to time if one of the two shops have stock and order the DMMs there.No one knows the date, stock will be available but it will be available some day.Only patience helps in this situation.

author: v81
author_rank: Regular Contributor
timestamp: April 08, 2022, 12:56:12 pm
content: I kinda find it a little strange that anyone thinks it unreasonable, nonsensical or impractical to email a store with a product enquiry.Especially so when the store has an email address dedicated to that purpose (separate to Dave's email address) .More so again when I have history of getting a reply within 24hrs in the past.Covid has caused some issues, sure, but it will get here... maybe... just be patient is not an answer that holds water 2-3 years into the pandemic.Do we even know if stock has been ordered?Nothing against Dave or the store, but I'm a little twisted at the replies here that are making baseless excuses that don't need to be made.Dave has people looking after this email address.I'm sure if email is functioning correctly that they can simply reply... 'Yes, we have some on order, expected 1-3 months' or 'No, demand was poor, we're not going to stock it again for a while'.It's email... not rocket science.After a couple of months I'm thinking there could be a blockage in communication and am here to query it, not be lectured by the community on what I should do.
EEVblog 1469 - AC Basics Tutorial - Part 2 - Phasors - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: April 22, 2022, 10:43:56 pm
content: Part 2 of the AC Basics tutorial series. What are phasors and doing phasor addition. In-phase, out of phase, and leading and lagging waveforms.Phi vs Theta phase angle.Leading into complex numbers in Part 3.00:00 - AC Basics Theory00:40 - Hop an AC waveform is produced01:37 - Degrees, Radiand and Gradians02:30 - The ugly equation for AC voltage03:08 - Theta vs Phi03:51 - AC Ohms Laws, vectors, and impedance04:42 - Phasors05:24 - Two AC waveforms and phasor analysis07:20 - Out of phase signals08:50 - Phase shift09:48 - Two sine waves always make another sine wave10:22 - Angular frequency11:45 - Phasor diagram13:04 - How to add two phasors graphically16:56 - CIVIL: Capacitors and Inductors with current Leading and Lagging18:19 - Leading into Complex Numbers
You Tube idiots have changed their video playing framing? - Page 1
Forum section: electronics / general

author: peteb2
author_rank: Regular Contributor
timestamp: February 07, 2022, 01:35:38 pm
content: This is their latest fiddle around. No longer do i see the option to click for widescreen or fullscreen. I see a RHS cropped image & then you have to double clickor at full screen no other option. & you get a full frame on the monitor, no comments etc... Why You Tube? So Dave's vid plays with the RHS chopped off no other option. Just dumb...

author: peteb2
author_rank: Regular Contributor
timestamp: February 07, 2022, 01:47:19 pm
content: Scratch that....!!! Its bloody FireFox messing with my the window size!!! Apologies to You Tube. So darn annoying though.... Joys of having dual 4K screens & Fibre 300 so it's quite good being able to watch 4K video as it streams in but watch out as FF crops the vid framing automatically now rather than resize it proportionally as it used to do depending on how big your window frame is.... sheeze!

author: JPortici
author_rank: Super Contributor
timestamp: February 09, 2022, 06:13:37 am
content: Quote from: peteb2 on February 07, 2022, 01:47:19 pmhmm.. youtube app does the same to me if i block screen orientation and hit fullscreen

author: RJSV
author_rank: Super Contributor
timestamp: April 03, 2022, 03:58:50 pm
content: I've been wanting to ask similar question.On el-cheapo phone it used to be the case, could go back and forth, between 'upright' and widescreen sideways (using a tripod stand).Now, many 'widescreen' attempts are met with blank screen, but some title msg, like "Press xx and drag for xx". Or, barely touch the 'widescreen' and it shrinks to 1/4 size, there. You cannot touch the bottom progress bar, (to go back couple minutes), or same thing; it goes from full screen, to 1/4 occupied.That's not EEVBLOG, it's YouTube on any video. Might be Android user interface. Gawd, I wish we had more 'genuine' market stuff.I'm trying to study, about 'Anti-trust' dynamics, monopoly markets just 'Kiss the Green Butt from Hell', as my late-friend Jeffy would say...
ShortCircuit Quotes Dave  - Page 1
Forum section: electronics / general

author: nvidia
author_rank: Regular Contributor
timestamp: March 24, 2022, 09:17:23 am
content: https://youtu.be/EHhkW2Ezy-o?t=413

author: Ice-Tea
author_rank: Super Contributor
timestamp: March 24, 2022, 02:41:24 pm
content: Around 6:50

author: thm_w
author_rank: Super Contributor
timestamp: March 24, 2022, 09:15:29 pm
content: Anthony knows his stuff
EEVblog 1463 - Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 16, 2022, 10:53:48 pm
content: What's in Dave's Mailbag?SPOILERS:00:00 - Mailbag Bonanza!03:24 - 3M IDC Crimping tool04:57 - Bulova Accutron Watchmaster battery tester06:52 - The best button EVER!07:24 - Continentak Specialties Corporation breadboard07:53 - Moving Iron AC ammeter09:29 - Analog Devices power brick09:57 - Heathkit Digital Design Experimenter15:31 - Miniware e-Design ET15 motion control electic screwdriverhttp://www.miniware.com.cn/product-category/pocket-screwdriver/31:06 - G-Tronics IoT Proto Shield Plus development boardhttps://www.gtronicsshop.com/en/15-iot-proto-shield-plus37:28 - DIY through hole kit HP Voyager calculators PX-15C PX-16C PX-41Chttps://paxer.net/voyager/

author: Per Hansson
author_rank: Unknown
timestamp: March 17, 2022, 03:50:10 pm
content: The Heathkit can be wired for 240v mains by connecting the transformer primaries in series, see attached screenshot:

author: jonovid
author_rank: Super Contributor
timestamp: March 17, 2022, 11:30:01 pm
content: Bulova Accutron Watchmaster battery tester can you do a repair video & show the meter re-calibration processelectic screwdriver. true - user interface design is key a product lives or dies on how it works.also Heathkit Digital Design Experimenter wowcan EEVblog have your own retro style experimenter product for schools , IMO

author: RigPa
author_rank: Newbie
timestamp: March 24, 2022, 08:07:41 am
content: Always wanted a big red button like that! It would make me feel presidential with nuclear powers!!!
How do I set the timezone in my EEVBlog forum account? - Page 1
Forum section: electronics / general

author: Ben321
author_rank: Frequent Contributor
timestamp: March 06, 2022, 11:26:06 pm
content: The times on my posts are wrong. How do I set the timezone in my forum account?

author: Ben321
author_rank: Frequent Contributor
timestamp: March 06, 2022, 11:29:32 pm
content: Never mind. I found how to set it in this posthttps://www.eevblog.com/forum/chat/how-to-set-time-zone-for-forum/after Google searching for "eevblog forum timezone".
Why Aaronia spetran v5 handheld spectrum analyzer stop production? - Page 1
Forum section: electronics / general

author: nicegirl
author_rank: Contributor
timestamp: March 06, 2022, 03:42:53 pm
content: Aaronia spetran v5 handheld spectrum analyzer 8060 v5 cover 1Hz-6GHz,bindwidth 44MHz(opt. 88MHz).This is the only one handheld spectrum analyzer cover such wide frequency,has no any competitor.Why Aaronia spetran v5 handheld spectrum analyzer stop production?
EEVblog1460 - Interesting REPAIR of an Aputure Amaran LED Studio Light  - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: February 28, 2022, 10:08:51 pm
content: Dave repairs his failed Aputure Amaran HR672C LED studio light which is mysteriously killing batteries and falsely indicates charging when no batteries are installed.And salvaging the spare part from an old dumpster laptop!00:00 - Aputure Amaran HR672C FAIL04:00 - Teardown06:30 - Under the microscope11:30 - Measurements13:41 - Charger schematic15:56 - Analysis16:40 - More measurements on the likely culprit17:08 - Bingo!19:07 - Another fault?!19:27 - Let's salvage the replacement part from a dumpster laptop!21:42 - Suck it off and repair22:27 - Winner Winner Chicken Dinner
EEVblog 1461 - The MOSFET Search CHALLENGE - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: March 03, 2022, 09:51:11 pm
content: Join Dave in the search for an alternative replacement MOSFET. It might not be as easy as it sounds.Talk about how to identify components and function, MOSFET parameters, and using google and parametric searches on supplier and manufacturer websites.

author: BrianHG
author_rank: Super Contributor
timestamp: March 03, 2022, 11:51:18 pm
content: Aren't the Gate protection diodes Zener, not Schottky?

author: EEVblog
author_rank: Unknown
timestamp: March 04, 2022, 12:20:26 am
content: Quote from: BrianHG on March 03, 2022, 11:51:18 pmYes, zener, did I say schottky?

author: BrianHG
author_rank: Super Contributor
timestamp: March 04, 2022, 12:27:11 am
content: Quote from: EEVblog on March 04, 2022, 12:20:26 amNot only did you say anti-static schottky, you insisted every step in the entire video as well as searched for schottky protected mosfet. Guess what all your schottky protected mosfet results were: An extra protection schottky power diode between the drain and source.

author: BrianHG
author_rank: Super Contributor
timestamp: March 04, 2022, 05:03:37 am
content: @39:00My mistake, you were looking for ESD protected gate, but that made me more attentive throughout the rest of the video as I've knew about Zener protected gate, but it was the first time I heard someone calling it ESD like you see in IC inputs. You never specifically said you should search for schottky diode protected, but you kept on bumping into it in your search results.Equivalent Protected Gate at Digikey with stock:FDS7779Z Near perfect choice.SQ4483BEEY-T1_GE3 Double protected Gate with series resistor special.Others without stock at Digikey.SI4491EDY-T1-GE3 Stock at Mouser and Arrow.AO4447A Stock at Bristol Electronics.FDS6681Z Stock at Mouser.Others exists, but their good VGS on voltage begins at -10v, not -4.5v, so you need to be careful there.Also remember, when a MCU manually drives a P-Mosfet's Gate, it may be done with a open-collector IO pin or NPN transistor collector output through a series resistor. If you power supply is 2x8v batteries in series, potentially above 16v, those protection diodes may be in use to prevent the gate from exceeding a maximum -15v, or -12v for low gate voltage mosfets.

author: tinfever
author_rank: Regular Contributor
timestamp: March 04, 2022, 07:07:10 pm
content: AO4425 is in-stock on Digikey...barely. The Octopart stock history chart is kind of scary for that.Interestingly, AO4425 has an ESD rating of 4kV HBM, the Vishay SI4491EDY also is rated for 4kV HBM, and the Vishay SQ4483BEEY is only rated for 3kV. The original SM4303PSK has an ESD rating of 8kV HBM. Are there some applications when that rating difference would matter?
Bowden-cable power switch in lab gear - Page 1
Forum section: electronics / general

author: blackbit
author_rank: Contributor
timestamp: February 09, 2022, 08:10:27 pm
content: HiI vaguely remember a teardown video from a few years ago, in which I've seen this (maybe as part of a mailbag? not sure)...Some random piece of lab gear was taken apart, unfortunately I do not recall what it was.As it is tradition, the actual power switch was near the back of the unit, the power button in the front panel.Though, there was no bent plastic rod, instead a rather elegant bowden cable.Does anybody here understand what I am talking about?

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: February 10, 2022, 09:03:24 pm
content: Apart from a bad choice of category to post this in, what is your question? Yes, I know what you are talking about. But that does not seem to be the point.

author: blackbit
author_rank: Contributor
timestamp: February 18, 2022, 12:28:06 pm
content: The category might have been a bad choice.QuoteThis seemed somewhat appropriate. Which category would you suggest for this kind of question?QuoteI would appreciate a link to the episode where this cable showed up.Alternatively, if you have a product name or know where something like that can be purchased, that would help too.Thank you!

author: coppercone2
author_rank: Super Contributor
timestamp: February 20, 2022, 05:04:15 am
content: I never saw a bowden cable but I did see some rather interesting mechanisms in a sony stereo, I guess like a planar bowden cable.I also don't like those plastic push rod switches, if it breaks you cannot turn the equipment off easily. I have had them get popped into the chassis before too. I mean the isolation is nice but you need to make it better, the only danger of a bowden cable is that it has much worse isolation.

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: February 20, 2022, 10:06:57 pm
content: Sorry, I seem to have overread the part about the EEV episode. A problem with those actuators seem to be that they are invariably custom parts. ALPS did some switches like that, but you don't see them on offer anywhere. If you are looking for custom made bowden actuators, I have several companies even willing to do small runs, but they are all european.

author: vk6zgo
author_rank: Super Contributor
timestamp: February 20, 2022, 11:42:27 pm
content: The problem is, that type of actuator is not what people normally mean when they refer to a "Bowden Cable".https://en.wikipedia.org/wiki/Bowden_cable#Parts_and_variation

author: blackbit
author_rank: Contributor
timestamp: February 23, 2022, 10:45:52 pm
content: https://youtu.be/YYydU4l6sLo?t=837Yes! This is exactly the video I was looking for. Thank you very much.Now the only question that remains is, where do you go to buy such a contraption.

author: coppercone2
author_rank: Super Contributor
timestamp: February 24, 2022, 03:10:16 am
content: thats the same thing in the sony stereo
EEVblog 2 Keithley 2400 SMU Wobbly's - Page 1
Forum section: electronics / general

author: exit_failure
author_rank: Regular Contributor
timestamp: February 20, 2022, 12:01:24 pm
content: Hi Dave,I don't know if this is relevant for your case but I have a Keithley 2001 on my bench right now. In that unitALLthe Nichicon UVZ series electrolytic caps were leaky on the bottom were the leads penetrate the case. These caps are used everywhere on the analogue as well as on the digital board. In my case, this lead to a relay chattering on the analogue board. Judging from the design of the case, our instruments might be roughly the same age. Maybe yours has the same problem but with different symptoms.You can find more on my meter including an Image of some of the damage I just uploaded in this thread:https://www.eevblog.com/forum/testgear/keithley-2001-defective-relay/
EEVblog1457 - Old School Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: February 16, 2022, 10:12:18 pm
content: Old school mailbag.SPOILERS:00:00 - Old School Mailbag01:09 - TOASTY Quadcopter ESC08:07 - The best XMAS Tree LED light yethttps://www.elimo.io/11:26 - Kaiweets ST600Y Multimeterhttps://s.click.aliexpress.com/e/_ALpSqJ16:00 - UK Radio TeleswitchProtocol:http://downloads.bbc.co.uk/rd/pubs/reports/1984-19.pdf

author: Fungus
author_rank: Super Contributor
timestamp: February 18, 2022, 01:58:44 pm
content: How hard would it be to generate a radio signal to turn that electricity switch on during the day?I guess it would be highly illegal to interfere with BBC Radio 4 (that's a sacred channel in the UK) but it could be a really small transmitter if it was next to the box.Would make an interesting video but it's probably not Dave's thing.
EEVblog 1456 - Sega Toys Homestar Planetarium REPAIR - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: February 11, 2022, 09:44:17 pm
content: Repairing a Sega Toys Deathstar, err, Homestar Flux Planetariumhttps://amzn.to/3BsaIH7The designer Takayuki Ohira talking about the design:10 minutes of the Casio FX-91W spinning:

author: Fungus
author_rank: Super Contributor
timestamp: February 12, 2022, 01:34:04 pm
content: Quote from: EEVblog on February 11, 2022, 09:44:17 pmIs it just me or is the motor a bit jerky?

author: jonovid
author_rank: Super Contributor
timestamp: February 13, 2022, 03:36:48 am
content: Repairing a Sega Toys DeathstarWhy drive belts are used is to reduce motor noise in tape recorders & vinyl belt drive turntables at higher revolutions per minute RPM's at the motor axle.plastic spur gears also transmit tooth noise, however at the lower RPM's plastic gears will do as the gear tooth noise is below the lower limit of human audibility.plastic gear grease is also used reduce gear tooth noise, as well as lubrication.
EEVblog 1453 - Elgato Key Light Teardown - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: February 05, 2022, 11:45:09 am
content: Teardown of the Elgato Key Lighthttps://amzn.to/3oqObEW

author: Tom45
author_rank: Frequent Contributor
timestamp: February 05, 2022, 07:21:45 pm
content: Let the light warm up and then do some temperature measurements. It would be interesting to see if it really needs better thermal flow to the frame or not.

author: Fungus
author_rank: Super Contributor
timestamp: February 06, 2022, 09:18:02 am
content: I was sure Dave had a thermal camera somewhere...

author: jancumps
author_rank: Unknown
timestamp: February 06, 2022, 11:46:57 am
content: The controller/wifi part is anoff-the shelf module from Dexatek.

author: thm_w
author_rank: Super Contributor
timestamp: February 07, 2022, 11:08:45 pm
content: If you buy just one its not cheap, $300/ea (CAD)! Dave gave the price of two units.Quote from: jancumps on February 06, 2022, 11:46:57 amHe did post the datasheet, looks like it WIFI only, no BT (DK-9169).I don't see any public pricing of the module, I would have thought <$2, although the only rtl8711am modules I see on Ali are in the $4 range.

author: Faranight
author_rank: Unknown
timestamp: February 10, 2022, 10:24:15 am
content: Hi, Dave! A couple of questions.- Why are they using a 16 channel PWM driver (PCA9635) to drive a single LED strip?There seem to be 4 lines (4 pairs of wires) running to the strip and I've seen only 4 SOT-23 mosfets on the board.So even if they're using 4 channels that way, that still leaves 12 channels unused. How does that work?P.S. the PCA9635 datasheet is wrong - it says 16-bit LED driver, but it's actually 16 channel, 8-bit LED driver.- What PWM frequency are they running the strips at?Datasheet says the IC works at 97 kHz.Isn't this frequency gonna cause EMI up to a few MHz down the external wires that feed power to the LED strips?

author: thm_w
author_rank: Super Contributor
timestamp: February 10, 2022, 09:58:04 pm
content: Quote from: Faranight on February 10, 2022, 10:24:15 amThere is no problem with using 4 channels of a 16 channel chip, just means they've left some unused. For the cost of this product, the PCA9635 is relatively cheap, and means they don't have to deal with PWM on the microcontroller, it can setup the PWM then go off to do other things and the PWM will always be stable. Also another micro could be swapped in, and it will work as long as it supports i2c.As for EMI, they have the big resistors, and are soft switching the gates with 1k resistors. Should be ok.
EEVBLOG2 Youtube Silver Dislike Button Award ! - Page 1
Forum section: electronics / general

author: MrMobodies
author_rank: Super Contributor
timestamp: January 31, 2022, 08:03:54 am
content: Edit: Something has gone wrong and picture and text are not showing up properly and can't delete.Interesting Dave dedicated the EEVBLOG2 award to the bring back the dislike count.Don't know how to embed Odysee video:odysee.com/@eevblog:7/youtube-silver-dislike-button-award-!:4Just found this and no chance of it returning:https://www.pcmag.com/news/youtube-ceo-defends-hiding-dislike-count-says-it-reduced-harassmentQuoteQuoteWhat an excuse... So I am going to pick a video and be happy with it regardless of what the poll says about it and not be warned.1: Now how do they know that and especially the read if they haven't published the review and data on this or am I missing something?Reducing the dislike attacks immediately...sounds to me more like a fairy tale like they're taking us viewers like fools.What do you think?Let me remind of this scam: Rx7man, I think I found a new onehttps://www.eevblog.com/forum/dodgy-technology/i-think-i-found-a-new-one/youtube.com/watch?v=9FsQZXV2uP4Youtube video still there despite reporting it to Youtube and the BBC for ripping of their theme.https://www.eevblog.com/forum/dodgy-technology/i-think-i-found-a-new-one15/04/21:https://www.youtube.com/channel/UCoXKW-g9Dvgezvz7-6BGlLw/about]https://www.youtube.com/channel/UCoXKW-g9Dvgezvz7-6BGlLw/about31/01/22 Youtube scammer is now aware of comments in the discussion and has removed it:More power to this scammer and many others like it whether it is in the search results or hidden who don't have the Return to Youtube extension and I believe one day they might even crack down on that in their Chromestore.I found this and I am bit confused:https://support.google.com/youtube/thread/134791097/update-to-youtube-dislike-counts?hl=enQuoteAre they saying to the developers not to share the dislike data?

author: eti
author_rank: Super Contributor
timestamp: February 02, 2022, 02:10:04 am
content: Ermmm... rigggght. Guess it was a slow day at the lab.

author: amyk
author_rank: Super Contributor
timestamp: February 02, 2022, 02:27:58 am
content: If everyone becomes a "developer", they can see the dislike counts (and won't have to share them with anyone.)

author: xrunner
author_rank: Super Contributor
timestamp: February 02, 2022, 02:28:28 am
content: Quote from: MrMobodies on January 31, 2022, 08:03:54 amWell I dislike what she has to say.Why can't the "like" work in the same biased way? People can "like" their friends and other channels just because they found one video that was good and they want to "help" them. Gimme a break!
Why Pay $2.4M to Live In This Apartment? - Page 1
Forum section: electronics / general

author: SeanB
author_rank: Super Contributor
timestamp: March 19, 2022, 06:41:59 pm
content: Why Pay $2.4M to Live In This Apartment?Thought I should put up what $2.4 million buys you here by me.

author: Marco
author_rank: Super Contributor
timestamp: March 19, 2022, 07:56:37 pm
content: Maybe the opportunity cost for leaving it vacant (or on a low rent scheme) for a while makes it worth it just to wait for someone desperate enough?If the buyers think home prices can only go up, they can start to go a bit silly.

author: Scherms
author_rank: Regular Contributor
timestamp: March 30, 2022, 10:39:01 pm
content: I'm from Adelaide but I lived in Sydney for 10+ years and the mantra for finding the best place to live anywhere is this...'When you drive to work have the sun behind you, when you drive home from work have the sun behind you', simples!I lived here in the 'blue box' area... by rule!

author: james_s
author_rank: Super Contributor
timestamp: March 30, 2022, 11:25:58 pm
content: There's a similar condominium in Seattle I saw recently went on the market for about that same price.This whole area is nuts though, my modest split level house is worth over $1M at this point, which sounds great except all it really means is I'm paying taxes on a $1M house now and that value is only wealth if I sell it. I could be a homeless millionaire I guess.
EEVblog 1451 - How I Shoot EEVblog Videos - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: January 26, 2022, 10:18:52 pm
content: Showing you all the tools and techniques I use to shoot videos.Cameras, lighting, sound, streaming, editing, macro phototography, microscopes, green screen, and ATEM live production system.Sony NX80https://amzn.to/3o1iAtDSony ZV1https://amzn.to/33SCos8Rode NT55https://amzn.to/3Ay1HvsRode NT1Ahttps://amzn.to/34aZB8GRode NTG1https://amzn.to/3G5j1czRode Wireless Go2https://amzn.to/3FYbLyYBlackmagic ATEM Mini Prohttps://amzn.to/3KMo311Elgato green screenhttps://amzn.to/3KIRqRQApurue Amaran LED lightshttps://amzn.to/3H9lpjGOpteka x10 Macro lenshttps://amzn.to/3rSdBMSFocal studio monitorshttps://amzn.to/3rSdBMSFocusrite solohttps://amzn.to/33XeYSlManfotto 190 Tripodhttps://amzn.to/35fDz59Manfotto 290https://amzn.to/3rR4coNManfotto MVH500 headhttps://amzn.to/3r3EDBNManfotto 128RC headhttps://amzn.to/3AAK2TNManfotto 785 compact tripodhttps://amzn.to/3fZ8AMPLogitech C920 webcamhttps://amzn.to/3FYVfyBTascam DR70https://amzn.to/32ADsQT00:00 - Inside the EEVblog studio lab00:42 - Field video kit01:17 - Mailbag videos02:29 - Sony NX70 B Cam03:01 - Manfrotto 190 tripod and Sony NX80 main camera04:47 - Rode NT55 microphone and Sen06:01 - Sennheiser EW100 G3 Wireless microphone06:57 - Opteka Macro lens08:18 - Getting is all right in-camera + Depth of field09:23 - Studio Lights10:13 - Overhead studio lighting system11:25 - Shooting whiteboard videos12:27 - Editing workstation13:55 - HDMI camcorder capture + green screen15:50 - Voiceover audio Rode NT1A17:32 - Macro photography17:58 - ATEM/Targarno microscope live streaming bench tour26:50 - The importance of framing27:41 - Editing videos

author: tchicago
author_rank: Regular Contributor
timestamp: January 27, 2022, 05:03:25 pm
content: Dave, do and episode about life in Sydney and around.Bondi beach, Manly, etc., swimming pools in the ocean - very unique things that I have not seen anywhere else. Show and explain what Vegemite is. Huge white parrots that live on the streets. Those other birds that make sounds like whining cats. Circular Quay, Opera House closeup, Victoria Mall with those hanging clocks inside. I miss those places..

author: EEVblog
author_rank: Unknown
timestamp: January 27, 2022, 08:56:50 pm
content: Quote from: tchicago on January 27, 2022, 05:03:25 pmI almost started doing that a decade ago, here's the intro:
Inserting attached images inline. - Page 1
Forum section: electronics / general

author: jchw4
author_rank: Regular Contributor
timestamp: December 08, 2019, 12:50:57 pm
content: Could somebody tell me how to insert attached images inline?Other people suggested:QuoteThis works, but inserts full-size image, which could be like 2500x1600 or more, while attachment code supports thumbnails.I noticed that the list of attachments provides links:Code:[Insert Attachment 1 in the message][Insert Attachment 2 in the message]...which inserts attachment code:Code:[attach=1]But it also seems to be broken, because you cannot save post with this code.I tried putting it insideCode:block, but still no luck.Other forums suggest that SMF code may support attachimg,attachthumb, etc. But these also do not seem to work.Am I doing something wrong?

author: cds333
author_rank: Contributor
timestamp: December 29, 2021, 07:37:52 am
content: I notice the [ Attachment Invalid Or Does Not Exist ] is not working for me either.

author: jpanhalt
author_rank: Super Contributor
timestamp: December 29, 2021, 11:20:18 am
content: I think there is a discrepancy between what the attachment dialog says and does.I have learned just to live with it.

author: rsjsouza
author_rank: Super Contributor
timestamp: December 29, 2021, 11:32:14 am
content: Despite the various options are shown, inline image attachments only worked for a brief amount of time in the history of this forum.To attach an image, you can post normally attaching one or more images (they will all be shown at the bottom of your post as attachments).With the new post created, you can copy each image link to a text file. Then, click on Modify to edit your post and use the SMF img directive.To reduce the size of the images, use either width or height (checkhere).

author: magic
author_rank: Super Contributor
timestamp: December 29, 2021, 03:46:49 pm
content: The width/height attribute will not generate a thumbnail.You will wait for the full 10 megabyte, 20 megapixel image to download and then for the browser to scale it down for display.Personally, I either resize the images to ~1000px before uploading or post them as attachments only.

author: Bud
author_rank: Super Contributor
timestamp: December 30, 2021, 08:26:25 pm
content: That Toshiba had a beautiful plasma screen.I had one back in early 90-s.
5G and Aviation Safety - Page 1
Forum section: electronics / general

author: StevePollitt
author_rank: Newbie
timestamp: December 02, 2021, 04:51:36 pm
content: I don't know about anyone else but I'd love to see an EEVblog episode about the technical issues with 5G ground transmitters and the and the radar altimeters used on aircraft. There is a big fight going on between the FAA and the FCC over this and I'd love to understand the technical details that are at the heart of the argument. Thanks!

author: StevePollitt
author_rank: Newbie
timestamp: December 02, 2021, 05:01:31 pm
content: Just to clarify, this regulatory conflict is occurring in the US but obviously it could be an issue everywhere. I would be interested to know from people outside the US if there has been any discussion about the 5G altimeter issues in their country?
Veritasiums light bulb: What happens to lights on the far end of the wires? - Page 1
Forum section: electronics / general

author: Beamin
author_rank: Super Contributor
timestamp: December 01, 2021, 06:19:41 pm
content: Veritasium is a sneaky bastard and I thought the units in his answer was in seconds which confused me. So what would happen if we put light bulbs at the far end of the wires where they are 1/2c distant from the battery? They couldnt turn on almost instantly like the center light bulb that would break causality, they must be on at their distance in light speed from the battery?my brain exploded

author: Gyro
author_rank: Super Contributor
timestamp: December 01, 2021, 06:49:54 pm
content: https://www.eevblog.com/forum/chat/veritasium-(yt)-the-big-misconception-about-electricity/