hybridfree/eevblog-posts huggingface dataset:
EEVblog 1440 - Pentax Film Camera TEARDOWN - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: November 28, 2021, 10:30:35 pm
content: Teardown of a mid 90's vintage Pentax IQZoomEZY film camera.

author: julian1
author_rank: Frequent Contributor
timestamp: November 29, 2021, 06:37:28 am
content: So many moving parts, packed into a tight space. I wonder how they prototyped the product development. Perhaps some combination of full cad as well as independent plastic mockups of the critical mechanical assemblies - gear trains, focus drive, takeup drive perhaps?.

author: msuffidy
author_rank: Frequent Contributor
timestamp: November 29, 2021, 07:02:56 am
content: I think I have a DX3215 still that was my first digital camera. I took quite a few pictures with it. It is no match for SLRs today though. Here are some of the last ones I took. The DX3215 I think was probably later, but more consumer than the one you had at 1.3MP. Some times I just used the 640x480 setting so it would store more and de noise.

author: golden_labels
author_rank: Super Contributor
timestamp: November 29, 2021, 02:14:07 pm
content: Dave, answering your question about flash in modern cameras: because light is still needed to take photos.And not everyone wants to spend money on a separate flash: those go from $50 to $500. And are not even available for compact cameras. Not to mention walking around with such a device and holding it in hand while taking photos is inconvenient.

author: Kleinstein
author_rank: Super Contributor
timestamp: November 29, 2021, 02:47:32 pm
content: The buld in flash is not very expensive. I remeber that one could get 1 way cameras with a flash that where not that expensive. External flashes add complications to the control and there are different types. Though using the same hot shoe, some of the older ones can be quite nasty, with a relatively high voltage at the contracts. The internal flash also does not need to enter the flash strength as an extra parameter. An external flash may be more powerfull, but for most uses the internal one is good enough, especially with moder relatively fast film.After I got my first digital camera in 2000, I actually started taking more pictures with the conventional one than before. One kind of got used to taking more pictures and the first digital cameras were a bit limited with high contrast. Most pictures were still quite good, even with only 2 Mpixels.
Discord?  - Page 1
Forum section: electronics / general

author: Pack34
author_rank: Frequent Contributor
timestamp: November 29, 2021, 07:22:09 pm
content: Is there an eevblog discord server?

author: jpanhalt
author_rank: Super Contributor
timestamp: November 29, 2021, 07:31:40 pm
content: Discord Server:https://discord.com/safety/360044149331-What-is-DiscordNot on this blog, nor is there a non-tech chat area (in theory).

author: Pack34
author_rank: Frequent Contributor
timestamp: November 29, 2021, 09:45:36 pm
content: I would be tech chat. The ones I've found on Discord so far are either really DIY hobbyists or students.

author: tautech
author_rank: Super Contributor
timestamp: December 02, 2021, 01:53:26 pm
content: Quote from: Pack34 on November 29, 2021, 07:22:09 pmYep:https://discordapp.com/channels/441027249177886722/441027249630740490
Forum mechanics - How to save forum posts or comment I like? - Page 1
Forum section: electronics / general

author: ROT
author_rank: Contributor
timestamp: November 22, 2021, 08:04:43 am
content: Hi Everyone!I often surf here on the EEVBlog forum and I often run into topics or just single comments I find really useful and I want to be able to look that back later on.Is there a way "bookmark" comments?Currently I am sending posts to my my email, but I am sure there is a more elegant solution to track things I want to use/read maybe months later.Thanks in advance!

author: Kleinstein
author_rank: Super Contributor
timestamp: November 22, 2021, 08:08:56 am
content: One can use the bookmark function of the browser. The top line of the comment links to the comment (so kind of links to itself and one could save that link as a bookmark).

author: thinkfat
author_rank: Unknown
timestamp: November 22, 2021, 08:14:47 am
content: Just "Say thanks".

author: ROT
author_rank: Contributor
timestamp: November 22, 2021, 08:18:25 am
content: Quote from: thinkfat on November 22, 2021, 08:14:47 amYeah I saw this possibility but where can I track back posts I "said thanks to" ?Maybe there is a stupid easy way to do this but I am quite new to this.

author: oPossum
author_rank: Super Contributor
timestamp: November 22, 2021, 08:37:29 am
content: Quote from: ROT on November 22, 2021, 08:18:25 amhttps://www.eevblog.com/forum/profile/?area=showposts;sa=thanked;u=779477

author: ROT
author_rank: Contributor
timestamp: November 22, 2021, 08:45:57 am
content: Quote from: oPossum on November 22, 2021, 08:37:29 amThat is what I am looking for, thank you very much!Quote from: Kleinstein on November 22, 2021, 08:08:56 amThis can be also handy, considering it is easier to organize!Thank you guys for the help!

author: golden_labels
author_rank: Super Contributor
timestamp: November 22, 2021, 01:51:46 pm
content: You may also add a thread to your notification list.
Is there a way to notify a member that their PM mailbox is full? - Page 1
Forum section: electronics / general

author: jmelson
author_rank: Super Contributor
timestamp: November 11, 2021, 03:55:32 pm
content: Obviously, I can't PM him to tell him.Jon

author: edavid
author_rank: Super Contributor
timestamp: November 11, 2021, 06:16:56 pm
content: Semi-related question... is the email link supposed to work?

author: thm_w
author_rank: Super Contributor
timestamp: November 12, 2021, 09:22:47 pm
content: Quote from: edavid on November 11, 2021, 06:16:56 pmDo you have "Allow users to email me" enabled? It should be off by default.

author: edavid
author_rank: Super Contributor
timestamp: November 12, 2021, 10:13:52 pm
content: Quote from: thm_w on November 12, 2021, 09:22:47 pmYes, but clicking on the email link in another user's post never works for me (nothing happens). Does it work for you?

author: Whales
author_rank: Super Contributor
timestamp: November 12, 2021, 10:48:58 pm
content: Hmm, email link doesn't work for me either. I think it used to?

author: thm_w
author_rank: Super Contributor
timestamp: November 12, 2021, 11:04:29 pm
content: Quote from: edavid on November 12, 2021, 10:13:52 pmAh, definitely not working then..

author: edpalmer42
author_rank: Super Contributor
timestamp: November 13, 2021, 01:28:59 am
content: Quote from: jmelson on November 11, 2021, 03:55:32 pmIf the mailbox is full, then they're either ignoring it - which means you can't contact them or they haven't been active on the board for a while. Do you know which is true? FYI, you can check that on the member's profile summary page.Ed

author: edavid
author_rank: Super Contributor
timestamp: November 13, 2021, 01:40:30 am
content: Quote from: edpalmer42 on November 13, 2021, 01:28:59 amThe most common case is that they are a new member, and can't receive PMs yet (haven't posted enough times).

author: xrunner
author_rank: Super Contributor
timestamp: November 13, 2021, 01:43:57 am
content: Quote from: jmelson on November 11, 2021, 03:55:32 pmIf you are concerned PM an Admin here (Dave). The Admin can see everyone's email address and could contact them if needed.

author: jmelson
author_rank: Super Contributor
timestamp: November 15, 2021, 04:44:35 pm
content: Quote from: edpalmer42 on November 13, 2021, 01:28:59 amYes, we were having a back and forth discussion on P&P machines, and I replied to a message he sent and I got the mailbox full response from EEvblog. So, he was active the same day, and then my last message went over the limit.Thanks,Jon

author: jmelson
author_rank: Super Contributor
timestamp: November 16, 2021, 03:52:23 pm
content: Quote from: xrunner on November 13, 2021, 01:43:57 amI tried that, still no change.Thanks,Jon

author: Bud
author_rank: Super Contributor
timestamp: November 16, 2021, 08:23:33 pm
content: Quote from: edavid on November 13, 2021, 01:40:30 amThis ^^^

author: jmelson
author_rank: Super Contributor
timestamp: November 17, 2021, 04:15:36 pm
content: Quote from: Bud on November 16, 2021, 08:23:33 pmClearly not the case, as we had been exchanging PMs for several days, then I got the mailbox full error.Jon
EEVblog 575 - DIY 1970s Spectrum Analyser - schematic's ? - Page 1
Forum section: electronics / general

author: MathWizard
author_rank: Super Contributor
timestamp: November 13, 2021, 12:38:13 am
content: Does anyone know where Phill's schematic is or if or a 1960's 1970's, discrete style SA that 1 can build with copper clad and discrete parts, and make a homebrew SA good for at least a few 10's of MHzI'd like to try to make 1, and test the parts as I build it, to see if they match the spec's needed, and calculation's, etc. That would be a good excuse to buy real brand-name JFets, and make them work, I've heard they still vary a lot.Phil built a really cool looking SA. I guess the hardware alone will be pricey, but considering the cost of SA's, why not. Looking at the video I can see a lot of the parts/connections, I suppose I'm not far from from knowing what would be needed anyways.
EEVblog 1417 - Alternating Current AC Basics - Part 1 - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 08, 2021, 12:48:11 pm
content: Following in from the DC circuit fundamanetals seriis starts the AC circuti fundamentals series. This part 1 looks at:- What is Alternating Current- How AC is created using a generator- Angular Frequency- The sinusoidal waveform, benefits and downsides- Average, peak, peak to peak, and RMS waveforms, calculation and conversions.- Non-sinusoidal waveforms- Crest factor and its impact on multimeter RMS measurement

author: dtmouton
author_rank: Contributor
timestamp: November 11, 2021, 06:15:22 pm
content: Some fudging and unsubstantiated claims in the derivations:1. At 25:41: How can you just normalize the area A to 1? If the amplitude of the waveform is 1V then area A is indeed equal to 1 V rad, but you have to integrate to prove this. You cannot just normalize your problems away!2. At 30:30L "Squaring doesn't change the wave shape". This statement is not true in general. For instance, squaring a square wave gives a constant.In the case of a sine wave you have to apply the well-known trigonometric identity:$$\sin^2(\theta) = \frac{1-\cos(2\theta)}{2}$$It actually tells us something very special about sine waves, i.e. that squaring a sine wave gives us a sine wave with double the frequency. However, you cannot just make the statement that squaring doesn't change the wave shape without referring to this identity.3. At 36:14: The crest factor for a sine wave is equal to the square root of 2 which is 1.414 and not .414.
EEVblog 1434 - Cadex C7000 Battery Analyser Teardown - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: November 03, 2021, 11:22:07 pm
content: Teardown of a Cadex C7000 battery analyser.

author: thm_w
author_rank: Super Contributor
timestamp: November 04, 2021, 04:37:04 am
content: Dave, curious where this came from, since you said it was 110V I assume it was shipped from NA?They still list the C7000 on their website:https://www.cadex.com/products

author: EEVblog
author_rank: Unknown
timestamp: November 04, 2021, 08:22:16 am
content: Quote from: thm_w on November 04, 2021, 04:37:04 amYes, US import.

author: TheSteve
author_rank: Unknown
timestamp: November 04, 2021, 04:38:44 pm
content: Back in the 90's all of the serious cellular phone shops in my area had a Cadex unit to test batteries. They were pretty useful, especially in the NiCAD and NiMH days. They were also quite common in the 2-way radio rental and service dealers.

author: Kleinstein
author_rank: Super Contributor
timestamp: November 04, 2021, 05:04:56 pm
content: Chances are there is a 10 bit ADC inside the PIC.

author: Twoflower
author_rank: Frequent Contributor
timestamp: November 04, 2021, 07:04:38 pm
content: Nice label there.

author: hli
author_rank: Frequent Contributor
timestamp: November 04, 2021, 07:51:40 pm
content: Just a guess: 4 of the resistors are used as load for discharging, and the remaining 3 are used during charging, to balance multi-level cells.

author: markus
author_rank: Newbie
timestamp: November 04, 2021, 08:23:40 pm
content: Set a C7000 battery analyzer for stand-alone use1 Press the MENU key on the C7000 battery analyzer.2 Press ▲ or ▼ to scroll to SYSTEM SETUP (on the analyzer display screen), and then press ENTER.3 Press ▲ or ▼ to scroll to OUTPUT DEVICES, and then press ENTER.4 Press ▲ or ▼ to scroll to SERIAL PORT DEVICE, and then press ENTER.5 Press ▲ or ▼ to scroll to any setting other than BATSHOP, and then press ENTER.6 Press ENTER again to confirm your selection.7 Press ESC twice to return to the global display.The latest C7000 firmware V3.53 can be found herehttp://www.ko4bb.com/getsimple/index.php?id=download&file=06_Misc_Test_Equipment/Cadex_C7000_Battery_Analyzer_EPROM_3.53.BIN

author: faraday
author_rank: Regular Contributor
timestamp: November 10, 2021, 11:50:07 am
content: I have newer version c7400-c, need firmware 3.xx does anybody have?
EEVBLOG2:  Flux AI PCB Design and the Errors Startups Make - Page 1
Forum section: electronics / general

author: Psi
author_rank: Super Contributor
timestamp: November 03, 2021, 02:25:43 am
content: <Mini Rant>I think a lot of the mistakes startups make are related to not taking the opinion of their engineers seriously.Business people (or non-engineering types in general) tend not to understand just how critical the engineers at the company are and how important it is to listen to what they say.For the vast majority of small to medium businesses the engineers are the only people in the company who could actually run the entire company alone if everyone else left.Don't get me wrong, I'm not saying that engineers would be 'good' at marketing or graphic design or sales or managing or HR or finance, or that they would want to do it, just that they 'could' do it.No one else at the company would have a hope in hell of being able to do the job of the engineers.</ Mini Rant>
EEVblog 1435 - The World's Most EXPENSIVE Catalog IC - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: November 05, 2021, 08:44:48 pm
content: Dave goes hunting for the most expensive IC on Digikey and ends up finding a bunch of unusual stuff!

author: cortex_m0
author_rank: Regular Contributor
timestamp: November 05, 2021, 11:41:43 pm
content: That Flash memory that is the "most expensive IC" is listed as a wafer - so presumably many hundreds of unsawed dies.I would guess that's a product for someone wanting to make a system-in-package. Not sure why DigiKey lists it, though, it's not something just anyone could successfully use.

author: Kleinstein
author_rank: Super Contributor
timestamp: November 05, 2021, 11:54:44 pm
content: The AtMegaS64 is supposed to be a radiation tolerant version. So not the normal cheap chip, more like space grade.

author: BrianHG
author_rank: Super Contributor
timestamp: November 06, 2021, 12:01:20 am
content: @18:30, That differential in and out gate is actually and AND and an OR combined. If you swap the differential input's +&-, IE the polarity of the input data, the AND becomes an AND with inverted inputs, or in other words, a NOR gate. Then, what do you assume happens to that NOR gate when you swap the +&- on the outputs?

author: EEVblog
author_rank: Unknown
timestamp: November 06, 2021, 10:02:28 am
content: Someone on Twitter found this!$1.89M Molex machinehttps://www.digikey.com/en/products/detail/molex/0627007100/5152355?s=N4IgTCBcDaIAwDYwHY52QRjSAugXyA

author: Lord of nothing
author_rank: Super Contributor
timestamp: November 06, 2021, 01:12:25 pm
content: Cheap almost 2mk in my Country: €1.964.995,21536

author: Jan Audio
author_rank: Frequent Contributor
timestamp: November 06, 2021, 04:26:42 pm
content: I usually add the maximum ammount possible into my shopping cart to see what it cost.Some shops do crash.

author: Neilm
author_rank: Super Contributor
timestamp: November 07, 2021, 06:05:13 pm
content: How about a resistor array?https://www.digikey.co.uk/en/products/detail/vishay-foil-resistors-division-of-vishay-precision-group/SSS-100/8581367Cheap at $5174.

author: thm_w
author_rank: Super Contributor
timestamp: November 09, 2021, 12:02:21 am
content: Why am I not surprised the most expensive thing on digikey is a Molex crimper.

author: james_s
author_rank: Super Contributor
timestamp: November 09, 2021, 12:07:16 am
content: I remember looking at some ~$70k FPGAs that Digikey had listed. I'd hate to be the guy who slips and pops one of those.

author: TheSteve
author_rank: Unknown
timestamp: November 09, 2021, 10:29:54 pm
content: Fun vid, but you gotta exclude all the third party crap like Rochester for it to feel real.
Where is my outbox - Page 1
Forum section: electronics / general

author: prutser
author_rank: Regular Contributor
timestamp: January 16, 2022, 06:07:30 pm
content: I recently sent some messages to someone, but when trying to look them up, I couldn't find them. When sending checked 'save a copy in my outbox' , but where is my 'outbox' ??My message menu only show read your message (which seemd only inbox) and send a message.What am I missing here ?

author: edavid
author_rank: Super Contributor
timestamp: January 16, 2022, 06:48:27 pm
content: https://www.eevblog.com/forum/pm/?f=sent
Is the preview feature broken? - Page 1
Forum section: electronics / general

author: Connecteur
author_rank: Frequent Contributor
timestamp: October 11, 2021, 04:08:46 pm
content: Looks like you don't get to preview your own post before you post it. At least that's what I've found.Is this intentional?

author: xrunner
author_rank: Super Contributor
timestamp: October 11, 2021, 04:21:28 pm
content: Quote from: Connecteur on October 11, 2021, 04:08:46 pmTest test test preview ...Preview is working just fine.

author: Kleinstein
author_rank: Super Contributor
timestamp: October 11, 2021, 04:26:20 pm
content: For most of the part the preview works fine, but it does not include attached files like pictures.It can be a bit confusing, as the preview is obove the entry field and one may have to scroll up to see it.

author: Connecteur
author_rank: Frequent Contributor
timestamp: October 11, 2021, 04:48:12 pm
content: Thanks for letting me know.I never get a preview, ever.

author: RoGeorge
author_rank: Super Contributor
timestamp: October 11, 2021, 04:57:47 pm
content: Write something, press preview, then scroll the page up to see the preview.If you don't see it, maybe you add-block that part of the page, or have a malfunctioning web browser.
EEVblog 1425 - Fluke Repair 2 Electric Boogaloo - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: October 06, 2021, 11:00:40 am
content: Part 2 of the Fluke 23 multimeter repair by digging into the bunker meter archives from episode #84Experimenting with alfoilPart 1:High energy Multimeter destruction:LCD Technology tutorial:

author: Kleinstein
author_rank: Super Contributor
timestamp: October 06, 2021, 12:04:25 pm
content: Many LCDs have the polarization at a 45 deg angle. With a loose polarizer foil one can than easy change the contrast from black segments to white segments, just by flipping the foil upside down. Many cheap pocket calculators come with a loose polarizing foil.

author: rsjsouza
author_rank: Super Contributor
timestamp: October 06, 2021, 02:04:30 pm
content: EEVBlog #84 is one of my favourites!

author: robert.rozee
author_rank: Frequent Contributor
timestamp: October 07, 2021, 10:58:42 am
content: as i recall, light reflected off a metal surface is to some degree polarized. dave may have had slightly better success with a piece of white paper rather than metal foil, it would be interesting to see the result. certainly, the 'outlined' effect in the video is odd.i've found that a good source of (rather large) scraps of polarized film is from the front of a broken LCD monitor or TV.cheers,rob :-)

author: rsjsouza
author_rank: Super Contributor
timestamp: October 07, 2021, 11:16:19 am
content: Quote from: robert.rozee on October 07, 2021, 10:58:42 amSince you mentioned, I now recall putting a piece of paper behind one of those table alarm clocks with see through LCDs. I recall that beige worked better than white, as it reduced the glare.

author: coppercone2
author_rank: Super Contributor
timestamp: October 07, 2021, 09:49:58 pm
content: I had a fluke thermocouple unit with the same brown plastic screen clamp thing.. which happened to disintegrate into around 30 pieces. I painstakingly glued it all back together but I guess something happened to the plastic, as it kept breaking in different places. Ended up throwing it into the trash. That mechanism they designed to clamp the screen down is a real piece of work, I hate it. I did not want to even try to replicate it on 3d printer. The one in that meter looks a little bit more beefy and easier to repair though, the one I had was super thin and shit
Duracell batteries leaking - Page 1
Forum section: electronics / general

author: David1988
author_rank: Newbie
timestamp: October 07, 2021, 04:14:32 am
content: A while ago Dave released a video about alkaline batteries leaking, with Durracel AAs being a repeat offender for leaking. Dave then performed a few experimentsWell here is a picture of some Duracell batteries still in their packaging still in code leaking.

author: tunk
author_rank: Super Contributor
timestamp: October 07, 2021, 10:13:48 am
content: There's already a long thread about this:https://www.eevblog.com/forum/chat/durahell-batteries/
EEVblog 1422 - Telsa Victoria Big Battery Fire REPORT - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 28, 2021, 10:10:35 am
content: The report has been released on the Tesla Moorabool Victoria Big battery fire by Energy Safe Victoria, let's go through it and discuss the cause.00:00 - Overview Tesla Moorabool Fire02:44 - Finding on the cause of the fire07:14 - Corrections and improvements required to get back online09:26 - Physical pack spacing11:01 - Statement of Technical Findings Report12:30 - Root cause13:45 - Contributory Factors16:53 - Lessons leanred and preventing a recurrence17:31 - Dave's hypothesis20:49 - Fire propagation prevention22:28 - Conclusion24:50 - Other installations

author: EEVblog
author_rank: Unknown
timestamp: September 28, 2021, 10:14:15 am
content: Discussion is on the orignal thread:https://www.eevblog.com/forum/renewable-energy/australias-biggest-tesla-battery-storage-system-at-moorabool-is-on-fire/msg3715759/#msg3715759
Problem with an order. - Page 1
Forum section: electronics / general

author: Robosity
author_rank: Newbie
timestamp: September 26, 2021, 11:15:32 pm
content: I know right now this is probably not the right place for this question, but I've tried making contact with private messages and nothing has worked.I placed an order for a second 121GW at the end of August (stock showed about a dozen units) and the payment (PayPal) with through fine almost immediately. However there has been no communication since; no order acknowledge or shipping notification. I've tried private messages to the admin (EEVBLOG) twice over the last few weeks and have received not reply. I'm about to tell Paypal to go retrieve the funds... This is so unlike the first order back a couple of years ago where the reply was instant and delivery was quick (at least for a recipient on the west coast of US.) What did I do wrong?Yes, I've looked all my SPAM folders and have found nothing. I've used email as well as eevblog private messages.Has anyone else experienced this?I love the product and had great support on the previous one.-Gary

author: Robosity
author_rank: Newbie
timestamp: September 27, 2021, 02:57:22 am
content: Finally received a reply from Dave. All good. Seems PayPal told *ME* it had paid, but not EEVBLOG store...No worries remain.-Gary
EEVblog 1418 - The Most EMBARRASSING Repair - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 14, 2021, 10:25:33 pm
content: This "Repair" of a Keysight DSOX1102G oscilloscope was a tad embarrassing...

author: TheSteve
author_rank: Unknown
timestamp: September 15, 2021, 08:02:55 am
content: The scope clearly doesn't like it there, even though it now appears to be working again it should be sent to my lab for disposal. Keysight products are always happy in my lab.

author: skander36
author_rank: Frequent Contributor
timestamp: September 15, 2021, 09:00:14 am
content: At that time also my "hacked" scope (DSOX1002A) has beginning to behave like Dave scope. But after reverting the hack, which many times has been succesfully, last time has not been return to normal. Instead it has failed calibration on channel 2 and deepened this simpotm with every failed calibration, until both channel have completely get out of scale. No reset, downgrade/upgrade fw, have been able to restore it. After sending to a local dealer they replaced it with a new one.

author: Kleinstein
author_rank: Super Contributor
timestamp: September 15, 2021, 09:50:11 am
content: Different hardware configurations can have a different format for the cal data (e.g. 2 channel version needs less than 4 channel). An incompatible data format coud srew up the calibration. Having a different HW than the SW expects can definitely make the internal CAL fail. The resistors are not just to sell crippled versions. Chances are they have the same SW for different versions like a 2 and 4 channel verion and they may use those resistors to detect those diferences too, though some may be detectable in a different way too.

author: Bud
author_rank: Super Contributor
timestamp: September 15, 2021, 04:16:42 pm
content: Quote from: skander36 on September 15, 2021, 09:00:14 amSeems you made an improper selection of the strapping resistors, especially if you did not apply the channels and trigger hardware mods. Or had a poor soldering job.

author: skander36
author_rank: Frequent Contributor
timestamp: September 24, 2021, 10:57:03 pm
content: Poor soldering job can be excluded, but I have done succesfully multiple times, mod and revert. There were just two resistors, so as long as the mod was succesfully more times, it is not possible to put other resistors.But at one point in time reverting was no more posible.

author: amyk
author_rank: Super Contributor
timestamp: September 26, 2021, 01:01:14 am
content: I suspect this could be something theAgilentKeysight people put into the firmware to mess around with those trying to hack their way to a free upgrade...
EEVblog 1420 - Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: September 23, 2021, 01:38:58 pm
content: 1 hour Mailbag!SPOILERS:00:00 - Pleo the Dinosaur!The Commodore Collector:https://www.thecommodorecollector.com/06:23 - Amazing workbench of the week from voltnut Xdevs!https://xdevs.com/14:25 - DEC VAX 370/11 135A 5V PSU teardown22:22 - Emizon MCM Electronics alarm panel + AdPlayer LCD screenMike's LED Shed:https://www.youtube.com/c/MikesLEDShed/31:29 - GVDA GD128 Colour LCD Multimeterhttps://s.click.aliexpress.com/e/_ATURD045:37 - I void Warranties T-Shirt46:25 - Denon capacitor xmas ornament47:41 - NetSTM32 ethernet boardhttps://www.tindie.com/products/netcubesystemsat/stm32-ethernet-board/https://netcube.li/docs/stm32netboard/51:22 - Kevin Lutzer's PCB Business Cardhttps://kevin.lutzer.ca/overview54:22 - SnowPi RGB Xmas ornamenthttps://snowpi.xyz/56:48 - Probe dithering average vibration attachment

author: golden_labels
author_rank: Super Contributor
timestamp: September 23, 2021, 05:59:41 pm
content: I will never stop being amazed by your professional reviews of hole warmers, probe attachments and otherinteresting stuff. Perfect!

author: msuffidy
author_rank: Frequent Contributor
timestamp: September 23, 2021, 11:30:33 pm
content: That power supply seems to be from a VAX 11/750 or related mainframe. There appears to be 2 different power supply boxes, like 2.5 and 5 volts. I have seen some documents about the mainframe, and just found the motherload on that part:GOTCHAhttp://oldcomputers.dyndns.org/public/pub/rechner/dec/manuals/decimages/h7104-d.pdffrom the system ofhttp://lastin.dti.supsi.ch/VET/sys/VAX/VAX-11-780/EK-11780-PG-001.pdfhttps://vt100.net/mirror/antonio/ek-vaxv3-hb-001.pdf

author: mancausoft
author_rank: Contributor
timestamp: September 24, 2021, 11:45:19 am
content: The also installed on vax 11/780, this a photo of the one that we start to repair

author: Neilm
author_rank: Super Contributor
timestamp: September 24, 2021, 04:50:12 pm
content: Further reviews of that multimeter should include a 600 V very low impedance supply, a CDN and an 8 kV transient source.I would suggest blast shields and a slow motion camera
EEVblog 1410 - Mailbag - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: July 29, 2021, 10:10:56 pm
content: SPOILERS:00:00 - Dancom RT403B 25W VHF Marine Transceiver teardown.09:07 - Workbench of the week, Tony Albus:https://www.youtube.com/channel/UCwLPcv2xiA3D9lfGArF58wwTEA:https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/12:36 - Riedon SSA-100 100A Differential Isolated Current Sensor.https://riedon.com/https://www.digikey.com/en/products/detail/riedon/SSA-100/1214932722:19 - DODGY! Soviet era mains rechargable torch27:36 - Jon Newcomb's Microcontroller Proto Boardshttps://www.ebay.com/usr/jon_newcomb33:57 - Affable Snake Breadboard LED bargraphhttps://www.tindie.com/products/affablesnake/slim-breadboard-indicator-green-8-position/35:34 - Mystery $2 ebay item DESTROYED by Widlarizer!37:47 - Present from a 13yo viewer39:40 - Multimeter PicoProbes:https://www.tindie.com/products/twires/picoprobes/

author: Monkeh
author_rank: Super Contributor
timestamp: July 29, 2021, 10:50:04 pm
content: That case is what you get off a 3D printer which is working properly, rather than something like a Creality firing on three cylinders with a hole in the exhaust.

author: MAS3
author_rank: Regular Contributor
timestamp: July 29, 2021, 11:54:33 pm
content: Hi.The 1st item is a marine VHF, and the invoice / warranty forms are in Dutch, not Danish (like Australia not Austria).The module is an Australian made (by Sigtec) ATIS module, which is sort of a 'roger beep' transmitting the station callsign through a FSK pulse train.This ATIS became mandatory on inland waterways in 1995 or so.This particular module also has a killer, which detects and suppresses this rather unpleasant FSK signal on the audio output of this radio (through the white wire to the audio amp).

author: agtrbt
author_rank: Contributor
timestamp: July 30, 2021, 04:03:24 am
content: The soviet mains charged torch has been copied into a one hung low Chinese shavercertainly dangerous.

author: ve1nhb
author_rank: Contributor
timestamp: September 17, 2021, 06:12:27 pm
content: How did the 'FLASHLIGHT' charge the batteries work.

author: thm_w
author_rank: Super Contributor
timestamp: September 20, 2021, 08:37:06 pm
content: Quote from: ve1nhb on September 17, 2021, 06:12:27 pmhttps://en.wikipedia.org/wiki/Capacitive_power_supply
Right to Repair - Random Answers - Page 1
Forum section: electronics / general

author: sandalcandal
author_rank: Unknown
timestamp: August 20, 2021, 01:50:27 pm
content: As mentioned in the YouTube comments. I (and others) think this is a great video which deserves to go on the main channel with just a little bit of work inserting cards for the "questions". No need for a newly recorded intro, just everything there with that presentation style is great. No need to click bait or sensationalise. Just a clear, clean, sober explanation of right to repair issues as a resource to refer people to.

author: Nominal Animal
author_rank: Super Contributor
timestamp: August 20, 2021, 04:31:32 pm
content: Fully seconded. Maybe use the Youtube timeline/chapter stuff to split each question separately at the question cards, but that's it.I was surprised how exactly in agreement Dave's opinion/reasoning was with mine (or vice versa, me fail English).I like how straightforward and simple Dave kept the reasoning, too.

author: ssander
author_rank: Contributor
timestamp: August 27, 2021, 12:30:10 pm
content: ACA did a story on this topic tonight (27/8/21)https://9now.nine.com.au/a-current-affair/movement-pushing-for-consumers-right-to-repair-broken-electronic-devices-products/e4774738-49c3-4ae5-b329-9385537eb5b8
LIVE Testing StreamYard - Page 1
Forum section: electronics / general

author: Brumby
author_rank: Unknown
timestamp: July 28, 2021, 03:56:11 am
content: Something I noticed a couple of times - one of which is at 23:40....Take a look up in the top right corner. Classic!

author: MrMobodies
author_rank: Super Contributor
timestamp: July 28, 2021, 07:27:47 pm
content: The ostrich?What's funny about that?Just noticed the background in the lab is looking really tidy where the shelves are.

author: Brumby
author_rank: Unknown
timestamp: July 29, 2021, 05:08:57 am
content: What ostrich?I'm talking about Jonny and the Dave hand logo.

author: MrMobodies
author_rank: Super Contributor
timestamp: July 30, 2021, 01:36:39 am
content: I see, sorry I mistook left from right but I now see the reference to the hand.
No unread topics found since your last visit. Click here to try all unread topic - Page 1
Forum section: electronics / general

author: perdrix
author_rank: Frequent Contributor
timestamp: August 21, 2021, 12:25:41 pm
content: I get the subject message on all forums since about two days ago.

author: tunk
author_rank: Super Contributor
timestamp: August 21, 2021, 12:53:04 pm
content: I've also seen this the last ~2 days when I go to"Show unread posts since last visit". I think it happenswhen I've been away 8-10-12 hours, but not after maybe1-2 hours.

author: ledtester
author_rank: Super Contributor
timestamp: September 25, 2021, 07:35:32 am
content: My unread topics list just got cleared out... used to have at least two pages but after I posted a reply to a thread it just showed a couple entries.It seems this new behavior has been going on for a while -- your unread topics list gets reset periodically as if you clicked on "Mark all messages as read".

author: Whales
author_rank: Super Contributor
timestamp: September 25, 2021, 08:03:51 am
content: I've had this happen a few times here, typically when the forum software is brought back online after downtime.

author: wilfred
author_rank: Super Contributor
timestamp: September 25, 2021, 08:05:30 am
content: After reading this I went and checked my unread topics list. Since I don't typically logon anymore I don't often clear the list. But I was logged on today and my unread topics list only goes back 2 pages. It seems pretty small.I can remember it could have been thousands of entries long. So something seems to have changed. Maybe not a bad thing if it is not a bug.
Flake Multimeter Watch - Page 1
Forum section: electronics / general

author: jonovid
author_rank: Super Contributor
timestamp: July 10, 2021, 10:48:14 pm
content: cool

author: Per Hansson
author_rank: Unknown
timestamp: July 11, 2021, 09:10:03 am
content: This is the correct thread linked in the video to discuss this:https://www.eevblog.com/forum/testgear/the-flake-multimeter-watch/

author: jonovid
author_rank: Super Contributor
timestamp: July 11, 2021, 05:55:31 pm
content: Quote from: Per Hansson on July 11, 2021, 09:10:03 amforum search box did not have a match forFlake Multimeter Watchso I did postthe wordsthe&testgearwould have made all the difference!

author: Bud
author_rank: Super Contributor
timestamp: July 11, 2021, 07:40:21 pm
content: Another aspect of impracticality of such watch is akward positioning of your wrist - just imaging you use one and hold both probes and look at the watch display.

author: floobydust
author_rank: Super Contributor
timestamp: July 11, 2021, 08:31:12 pm
content: I think it's better than silly "handheld" multimeters, they are stupid - just try hold it in one hand and manipulate two probes. Realistically, nobody does that. You set the multimeter down somewhere on it's stand.With the watch, one hand has a test lead and you can look at the probe and display? It's still better than pen style DMM's, display at a right angle to the probe is not great.

author: jonovid
author_rank: Super Contributor
timestamp: July 12, 2021, 02:57:00 am
content: there is a reason why 3D artists, and electronics engineers need to work together.

author: floobydust
author_rank: Super Contributor
timestamp: July 12, 2021, 05:42:05 am
content: The industry is scared to come up with a different form factor, look at ergonomics etc. We should celebrate over 40 years of the "bar of soap" format for portable multimeters. I'm sick of them falling over and the stand collapsing. A few manufacturers have tried different form factors, at least they try go outside the box.So a watch format may not be practical due to HV but it's at least thinking creatively. I wonder what Steve Jobs would do with it lol.

author: David Hess
author_rank: Super Contributor
timestamp: July 12, 2021, 01:46:39 pm
content: Quote from: floobydust on July 12, 2021, 05:42:05 amI much prefer the older style with straight sides and minimal rounding of corners for the reason you give; they do not tip over as easy. Some modern instruments copy the style of smartphones to the point of being useless.

author: Bud
author_rank: Super Contributor
timestamp: July 20, 2021, 04:28:59 am
content: Quote from: floobydust on July 12, 2021, 05:42:05 amYou would had to use your fingers as probes

author: David Hess
author_rank: Super Contributor
timestamp: July 20, 2021, 06:23:33 pm
content: Quote from: Bud on July 20, 2021, 04:28:59 amIf you electrocute yourself, then you are finger probing wrong.
EEVblog2: Trek FX Hybrid Bike Shimano Shifter/Derailleur Cable Replacement - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: July 26, 2021, 07:15:18 am
content: Something a bit different:Dave replaces the Shimano front and rear shifter/derailleur cables on his Trek FX 7.3 hybrid bicycle.
EEVblog 1399 - Electronics Fundamentals: Voltage Dividers - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 14, 2021, 01:06:26 am
content: Fundamentals video. Voltage dividers, series and parallel resistors, current dividers, a revisit of Norton and Thevenin's theorems, rules of thumbs, and a trap for young players experiment on circuit loading.00:00 - Intoduction to voltage dividers01:33 - Uses of voltage dividers04:27 - Rules of thumb06:55 - Calculations08:57 - Current dividers10:56 - Let's revisit Thevenin & Nortons Theorems17:29 - Experimental trap for young players

author: Brumby
author_rank: Unknown
timestamp: June 14, 2021, 02:38:13 am
content: I prefer to remember the parallel resistor formula this way:$$\frac{1}{Rt} = \frac{1}{R1} + \frac{1}{R2} + \frac{1}{R3} + \frac{1}{R4} + ... $$It is algebraically identical to the way Dave presented it, but I find it clearer - and it follows a similar pattern as the series resistor formula:$${Rt} = {R1} + {R2} + {R3} + {R4} + ... $$

author: JustSquareEnough
author_rank: Unknown
timestamp: June 17, 2021, 10:37:15 pm
content: another great fundamentals video, Dave. thank you.

author: EEVblog
author_rank: Unknown
timestamp: June 18, 2021, 12:57:09 pm
content: Quote from: Brumby on June 14, 2021, 02:38:13 amThat's how I think of it too, but ultimately you have to move that 1/ to the other side of the equation to get the final result.Waiting for the siemens fanboys...

author: Alti
author_rank: Frequent Contributor
timestamp: June 18, 2021, 02:23:30 pm
content: Quote from: Brumby on June 14, 2021, 02:38:13 amI prefer this one. Works for any i,j from 1 to N and this is one division only:$$Rt = \frac{\prod_{i}^{}Ri}{\sum_{j}^{} \prod_{i\neq j}^{}Ri}$$

author: legrady
author_rank: Contributor
timestamp: June 25, 2021, 12:34:28 am
content: You're using your calculator, anyway ... and it has a "1/x" button, so the clean version is easy enough to implement.Tom

author: Vincenzo
author_rank: Regular Contributor
timestamp: July 07, 2021, 01:02:40 pm
content: Dave,I bet we all grew up collecting fun notes just like the guy who started Wolfram, the most fun websites for nerds. I want to share a few pages of my notes that are relevant and hope that you and readers find them fun just like I did one day.
TL866II+ - cant read or write any efi bios -macbook pro or air - Page 1
Forum section: electronics / general

author: naitek
author_rank: Newbie
timestamp: July 09, 2021, 09:52:05 pm
content: Hey Everyone;i was so happy to get this programmer thinking all my issues would be resolved, but alas no luck;--before starting;all of these bios' are working in the pro/air and they are taken out of;when trying to dump the file - i get all 0's or all ff's when dumping any of the bios chipsthese chips are :winbond 25q64fv &'macronix' mxic-mx25l64maybe i just am unable to read these files or the Tl866II+ is unable to ?any ideas?thanksnai

author: naitek
author_rank: Newbie
timestamp: July 09, 2021, 10:02:18 pm
content: recently done using minipro on mac:Chip ID mismatch: expected 0xEF4017, got 0x0000 (unknown)Erasing... 0.41Sec OKProtect off...OKWriting Code... 38.39Sec OKReading Code... 14.05Sec OKVerification failed at address 0x0000: File=0xFF, Device=0x00
Wait is he on TikTok now? - Page 1
Forum section: electronics / general

author: jakkas
author_rank: Newbie
timestamp: July 07, 2021, 08:05:25 am
content: Just found this Video this morning:https://vm.tiktok.com/ZSJb5Tdad/

author: Brumby
author_rank: Unknown
timestamp: July 07, 2021, 08:22:44 am
content: Don't panic everybody .... he's talking about our Dave!
Keysight 60% sale banner add links to a 404 on the keysight site. - Page 1
Forum section: electronics / general

author: BradC
author_rank: Super Contributor
timestamp: July 02, 2021, 11:53:39 am
content: Not sure where to post this. Accidentally clicked on the banner add to be shunted off to a 404.Link is :https://saving.em.keysight.com/en/used/low-cost-oscilloscope/fully-upgradable/msox3012a-e174687941771?utm_source=eev&utm_medium=ban&utm_campaign=eevblogApr21

author: rsjsouza
author_rank: Super Contributor
timestamp: July 02, 2021, 11:59:29 am
content: Brad, it may be a country issue. The link works fine from where I live (US)
EEVblog 1401 - DC Power, Efficiency, & Maximum Power Transfer Theory - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 21, 2021, 11:11:17 pm
content: Dave closes out the basic DC circuit series with DC Power, Efficiency, & Maximum Power Transfer Theory tutorial. Includes Ohm's law refresher.DC Fundamentals Playlist:https://www.youtube.com/playlist?list=PLvOlSehNtuHtVLq2MDPIz82BWMIZcuwhK

author: thm_w
author_rank: Super Contributor
timestamp: June 22, 2021, 08:11:30 pm
content: Quote from: suzhiming on June 22, 2021, 12:09:26 pmSurely you can find a VPN to use right. Is odysee also blocked?https://odysee.com/@eevblog:7/eevblog-1401-dc-power,-efficiency,:6

author: EEVblog
author_rank: Unknown
timestamp: June 24, 2021, 11:52:08 am
content: Quote from: suzhiming on June 22, 2021, 12:09:26 pmI'm on Odysee, Utreon, Vimeo, Bitchute, and my own server at eevblog.org, so take your pick.

author: szszoke
author_rank: Regular Contributor
timestamp: June 24, 2021, 06:07:03 pm
content: Quote from: EEVblog on June 21, 2021, 11:11:17 pmI really like that you are making these videos again. It feels like the good old days when I started watching your videos.
Urgent on B450 AORUS M - Page 1
Forum section: electronics / general

author: msuffidy
author_rank: Frequent Contributor
timestamp: June 17, 2021, 07:11:55 pm
content: Here is some stuff on the option of externally programming the BIOS on THIS MOTHERBOARD on the bottom(originally I linked the wrong video)It is probably safer to just use a crap ryzen to do it, but if you have the stuff and maybe a programmer, clamp it may be a zero dollar option.Here is another:
EEVblog 1400 - Hard Drive Micro Actuators are AMAZING! - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: June 19, 2021, 03:24:29 am
content: Dave takes a closer look the micro actuator used in the 6TB Western Digital RED hard drive.

author: Brumby
author_rank: Unknown
timestamp: June 19, 2021, 03:44:32 am
content: @EEVblog Any luck with that laser displacement device you mentioned in YouTube comments??

author: Kleinstein
author_rank: Super Contributor
timestamp: June 19, 2021, 04:53:28 am
content: The piezo actuators also work as sensors. So if connected right, the pizos should show a voltage in response to the mechanical force on the tip. This works really nice with the piezo discs from beepers - can be used for small experiments.Chances are good to see the response the other way around: e.g. scope to the contact and some variable force to the tip.I would expect the piezos to extend / contract in the longitudinal direction.

author: dynorat
author_rank: Newbie
timestamp: June 20, 2021, 03:22:58 pm
content: Dave nice video i do have a ? what do you know about the aluminum-air battery would be a battery battery

author: EEVblog
author_rank: Unknown
timestamp: June 24, 2021, 11:53:20 am
content: Quote from: dynorat on June 20, 2021, 03:22:58 pmNothing really, sorry.

author: EEVblog
author_rank: Unknown
timestamp: June 24, 2021, 11:54:22 am
content: Quote from: Brumby on June 19, 2021, 03:44:32 amIt's buried in my bunker somewhere...