hybridfree/eevblog-posts huggingface dataset:
Hot metal typesetting: a video about beautiful, old technology - Page 1
Forum section: electronics / general

author: golden_labels
author_rank: Super Contributor
timestamp: July 21, 2024, 08:57:29 am
content: Wikipedia:Hot metal typesettingLinotypeThe YouTube video:

author: PA0PBZ
author_rank: Super Contributor
timestamp: July 21, 2024, 10:11:24 am
content: Very interesting but the resolution is a bit disappointing, so I did a search and here is the same in 480P:https://archive.org/search?query=creator%3A%22Salesian+Vocational+and+Technical+Schools%2C+Italy%22
Looking for a quality set of mini / micro wrenches. - Page 1
Forum section: electronics / general

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 23, 2024, 05:10:12 pm
content: Looking for a set both SAE and Metric.Down to 2.5 mm or so.Looking for a decent set.So far most I can find look cheap and have poor reviews.-K

author: GLouie
author_rank: Regular Contributor
timestamp: July 23, 2024, 05:50:30 pm
content: I don't have personal experience with these, but usually try Micro-Tools for such things. Looks like they have sets by Moody, made in USA, in metric down to 2.5mm and SAE down to 5/64. $24 and $18USD. May be cheaper elsewhere.https://www.micro-tools.com/collections/wrenches

author: jpanhalt
author_rank: Super Contributor
timestamp: July 23, 2024, 06:16:30 pm
content: Are you sure you want a wrench and not a nut driver? At 2.5mm, something that grabs all six sides might give better feel. I have and use both. For really small stuff, I like the driver. The drivers look like a jeweler's screwdriver.They are Sears Craftsman lifetime and were bought a long time ago. The working end of the drivers is not chromed. Of course, Craftsman tools are now made in China and sold by a variety of places, including Lowes. I would check them out. Wiha is known as a quality brand. I have a few of its screwdrivers and like them. They are pricier.

author: Stray Electron
author_rank: Super Contributor
timestamp: July 23, 2024, 06:22:56 pm
content: Look for ignition wrenches. They were made for working on the small nuts and bolts inside of automobile engine distributors and most brands of them were good quality. The old Sears Craftsman brand was good stuff before K-Mart took them over and made the Sears brand even worse than the K-Mart brand.

author: Benta
author_rank: Super Contributor
timestamp: July 23, 2024, 09:53:47 pm
content: Like this?https://www.fohrmann.com/de/set-mini-maulschluessel.htmlhttps://www.reichelt.de/maulschluesselsatz-sw-1-4-10-teilig-micro-donau-980-p280016.html

author: Homer J Simpson
author_rank: Super Contributor
timestamp: July 23, 2024, 10:32:03 pm
content: Quote from: Benta on July 23, 2024, 09:53:47 pmYou had me with the DONAU 980's.Thank you. That is what i was looking for.
TTi Thurlby LA3200 logic analyser service manual and disassembler EPROMs TA2000  - Page 1
Forum section: electronics / general

author: rh100605
author_rank: Regular Contributor
timestamp: January 03, 2014, 12:50:44 pm
content: HiI have posted the service manual for the LA3200 / LA4800 logic analyser with circuit diagrams for both analyser and AP01/2/3/4 pods onhttp://www.ko4bb.com/manuals/index.php?dir=06)_Misc_Test_Equipment and use the search Thurlby ThandarI have added pod diagrams for the TA1000 / TA2000 logic analysers as well and have the Eproms for these models.I have also uploaded the EPROM Images for the Z80 and DP6502 disassembler pods on the same site. This EPROM will work in most AP01/ AP02 pods if the logic and sockets are fitted. otherwise you will have to use the circuit diagrams in the service manual to install some TTL and a socket.If anyone has other disassembler EPROM images I would be very interested in sharing. (e.g. 6800 / 6502 68HC11 )I have reverse engineered the Z80 and 6502 versions...… and made 6800 /11 8051 and 6303 versions.

author: Unknown
author_rank: Unknown
timestamp: January 03, 2014, 01:06:05 pm
content: Many thanks!

author: zippysticks
author_rank: Newbie
timestamp: July 20, 2024, 02:16:29 pm
content: Realise I'm replying to a 10 year old thread here but I'm looking for additional info (Manuals) and disassembler ROM's for the TA1000 Logic analyser.I have 8085 and 6502 ROMS in the machine at the moment and would love a copy of the Z80 ROM.Documentation for this model seems scarce too - a service manual would be wonderfulThanks

author: rh100605
author_rank: Regular Contributor
timestamp: July 22, 2024, 10:46:03 am
content: I have found the assembler source for the TA2000 to disassemble z80 - Z180 code.I made this by disassembling the 8085 disassembler I had and modifying it for the Z80/181.I did the 6303 and 68000 as well. I debugged these by using an LA4800 logic analyser to debug the Z80 and used the TA2000 serial port or battery backed SRAM images to load the analyser with examples of every op code. I could then watch the TA2000 disassembly on the LA4800.Attached is assembler file and the listing in a zip file.I have built the bin(obj) file using the Telemark Assembler as described in the .asm header but any Z80 assembler should work.https://www.ticalc.org/archives/files/fileinfo/250/25051.htmlhttp://www.s100computers.com/Software%20Folder/6502%20Monitor/The%20Telemark%20Assembler%20Manual.pdfAs 16 mbit roms are difficult to find, I used 32 or 64mbit roms with the same code image reproduced 2 or 4 times to allow all forms of unused address bits being tied up/down.There maybe another solution I have a LA4800 and Z80 disassembler roms but the pods I have now do not accept a rom which is sensed and loaded at power up. This could be a small "vero board add on.... circuits in the service manual on KO4BB.com ( link in earlier post)
2 Video Media Remotes;  77 Buttons:   Peeved...(Need AI ?) - Page 1
Forum section: electronics / general

author: RJSV
author_rank: Super Contributor
timestamp: July 17, 2024, 03:07:32 pm
content: Readers, you've seen the rants. A real feeling that technology innovations aren't utilizing the usual, traditional FEEDBACK processes.I'm saying, that 77 Buttons, (and often in darkened room), over TWO remotes is just not 'sustainable', to use a popular term.Eventually, these sorts of things go beyond simple grumbling. Those remotes DO in fact represent a wide opportunity. For example, the two media systems running in concert can go off to internet, grabbing a movie on-line, that isn't coming through on satelight dish, often due to excessive errors or dish pointing flubs.So, a person could justify all this basically hard to manage functions by pointing to the greater variety. Easy and quick to dispute that;Much of the 'Movie' content is going to be the old standards, which ironically seems to consist of Adam Sandler movies, plus more Adam Sandler movies.I pick that example because, the actor seems to be a frequent, convenient and non-controversial 'formula' or recipe movie.Ditto, for the whole 'Back to the Future' franchise. Point being, that I don't really feel like I've 'stumbled' on some gem of a movie, after a darkened fumble of one of those, 77 Buttons (44 plus 33, on each remote).My estimate is that many remotes will become obsolete, as you will use your AI 'button assist' APP, to get that Adam Sandler movie.Or, to get access to some OTHER, Adam Sandler movie....or another Back to the Future re-do!

author: themadhippy
author_rank: Super Contributor
timestamp: July 17, 2024, 03:53:26 pm
content: Get a decent learning universal remote and set it up so all the functions you use most are all on the same layer.

author: MK14
author_rank: Super Contributor
timestamp: July 17, 2024, 04:42:37 pm
content: Quote from: themadhippy on July 17, 2024, 03:53:26 pmPossibly one with backlit keys, as well.
BT module with Audio Module - Page 1
Forum section: electronics / general

author: scarr999
author_rank: Contributor
timestamp: July 16, 2024, 08:54:14 am
content: Hi,I am trying to make a audio module that has BT to connect to a pair of small speakers. I also require inputs to activate selected sounds.Here are the two modules I am using.https://www.ebay.co.uk/itm/275225937591https://www.ebay.co.uk/itm/193525989771I pair the two speakers and test it using my phone, it connects and I can hear sound out of both speakers (with only one BT connection from my phone.I turn off my phone BT, Connect the audio module via the BT module to the speakers but only get sound out of one speaker.I have changed the connection to the BT module from R to L channel and I get a clicking,I linked R and L together with solder and I get distorted audioI changed pads on the Audio module from L to R and again tried a the single channels and them linked togetherI tried adding both L and R channels from audio module to BT module with a common gnd and that failed.After all that I re-tested the phone and it works without issue.I also have used a brand new BT module, same results.Anyone any ideas?

author: Buriedcode
author_rank: Super Contributor
timestamp: July 16, 2024, 05:51:08 pm
content: I'm not clear one xactly what the setup is. To me it reads as:You have a bluetooth "transmitter" module, an audio module and two bluetooth speakers.You tested the (bluetooth) speakers using your phone, and sound plays out of both speakers.You wish to connect your audio module, to your bluetooth module, to connect to the bluetooth speakers, to play sound.Are your bluetooth speakers "one unit", as in, on bluetooth device, with two speakers attached, or are they two seperate bluetooth speakers, meaning that the tramitter needstwoconnections?It could be that the transmitter cannot connect to multiple devices, but just one "sink" that recieves stereo audio. So it can only connect to one speaker at a time.Note: I am unfamiliar with all the modules you mentioned.Edit: I noticed the audio output of the MP3 module appears to be differential - it has no common ground it drives both ends of the speaker, rather than have one output a the other ground. So powering these modules from the same power supply, and then connecting the speaker output to GND and the audio input of the BT module will short that amplifiers output, and the other output will be floating at half the power supply voltage. It is designed to drive a speaker, not a single output referenced to ground, at least thats how most 8 pin audio speaker drivers work.

author: tom66
author_rank: Super Contributor
timestamp: July 17, 2024, 02:38:36 pm
content: It's possible your BT audio module is in Headset Profile mode (for phone calls) which is mono only, and you need to get it into A2DP mode - assuming it supports that!
Substitutes for BF245A, BF199, BAW62? - Page 1
Forum section: electronics / general

author: Karel
author_rank: Super Contributor
timestamp: July 29, 2024, 07:55:00 am
content: I would like to build an input amplifier based on a schematic of an old Philips frequency counter but the components are not produced anymore.The BAW62 can probably replaced with the 1N4148 (however, diode capacitance is the double of that of the BAW62...).What are the closest substitutes for the BF245A and the BF199 (either TO-92 or SOT23)?

author: Alex Nikitin
author_rank: Super Contributor
timestamp: July 29, 2024, 12:16:54 pm
content: BF245A in this application can be replaced (from current production devices) by BF256B (TO-92) or MMBF4416 (SOT-23). BF199 can be replaced by KSP10TA in TO-92 or BFS17 in SOT-23. BAW62 can be replaced by 1N4148.CheersAlex
looking for some connector for a window shutter switch - Page 1
Forum section: electronics / general

author: kripton2035
author_rank: Super Contributor
timestamp: July 11, 2024, 08:18:43 pm
content: I bought some of these chinese loratap window shutter switchinside there is an esp8266 ripoff, that I will replace with a real one, and store my program in it...but I would likt to add a detection of window openi,g with a switch, so I need a 2 prongs connector (low voltage) to add to this switchwhat kind of connector would be best suited for this kind of application ?it will only conduct low voltage like 5v or even 3v (but there are mains voltages around ...)where can I modify the switch to install this connector ?thanks for any hints about this.

author: darkspr1te
author_rank: Frequent Contributor
timestamp: July 12, 2024, 09:23:07 am
content: The chip inside is supported by openbk software for Home assistant (if thats what you use)as for the connector maybe a inline jst type or a automotive two pin would work fine.
Audio crossover component with reference designator of REX. - Page 1
Forum section: electronics / general

author: paul8f
author_rank: Regular Contributor
timestamp: July 08, 2024, 04:30:56 pm
content: Hi,I'm returning to the Electronics world after a bit of an absence, so I'm a bit rusty to say the least...Came across two boards recently that both had components marked as 'REX' on the PCB silkscreen. The 1st board was a microphone pre-amplifier for a vocoder, and the 2nd board was a hi-fi speaker crossover device. At first, google was telling me that the letters were an acronym for 'Range EXtender', but that seems kinda wrong in this case. So, my question is what do the lettersREXstand for, or were abbreviated from?(After doing a little bit of digging, I discovered that REX components can be one of 2 types. The first being a resettable fuse (multifuse/polyfuse/polyswitch), and the second being a small lamp (soft protector or tweeter limiter) that looks like a cartridge fuse . I think the idea is that they protect the delicate tweeters from receiving too much power by absorbing unwanted transients. Could the R in REX stand for resettable??)Anyway, if anybody knows where the name REX comes from, I'd be interested to know.Paul

author: macboy
author_rank: Super Contributor
timestamp: July 08, 2024, 04:49:56 pm
content: An incandescent lamp works much like a polyfuse in that both have a PTC or positive temperature coefficient.In this case, they won't absorb transients, but much to the contrary, will allow brief transients to pass through. Instead, continuous high (high for a tweeter) power will cause the device to heat up and increase its resistance, which effectively reduces the power allowed through to the tweeter. Brief or occasional transients won't result in enough heating to trigger this effect. Likewise the tweeter voice coil can handle brief or occasional higher power transients but would overheat with continuous high input.

author: paul8f
author_rank: Regular Contributor
timestamp: July 09, 2024, 05:13:34 pm
content: Quote from: macboy on July 08, 2024, 04:49:56 pmYeah, it's all about the temperature coefficient.Good point as well about it being the 'continuous high power' that's to be avoided.Still no idea what the letters R.E.X. stand for, but at least now I understand how the component works, and can recognise it in the future!
Frequency calibration problem in impedance measurement using AD 5933 - Page 1
Forum section: electronics / general

author: kamran786
author_rank: Newbie
timestamp: July 11, 2024, 02:02:35 am
content: Dear Sir,I hope this message finds you well.I am using the AD 5933 evaluation board for impedance measurement; The data sheet says it can measure the impedance up to 10M ohm. I am currently measuring the impedance of a microfluidic device, where I capture the bacteria that increase the impedance from 3M ohm to 8M ohm, which is within the range of 10M ohms. I have encountered an issue where, for instance, if the impedance measures 8M ohms and I use a 3M ohm resistor for feedback during calibration, I do not obtain the correct impedance value. However, using an 8M ohm resistor for calibration provides an accurate impedance measurement. So the problem is, every time I have to calibrate the AD 5933 if there are slight variations in the impedance value to get the correct resultI have a few questions:1) Is it possible to use a single resistor value as a feedback Resistor for calibration to measure impedance ranging from 1 ohm to 10M ohms, thereby overcoming the challenge of frequent calibration? If so, could you please suggest some solutions to address the issue of frequent calibration?2) I recently read a paper where the author utilized an HMC 245A switch to address the issue of frequent calibration in impedance measurement. Is this method effective? The HMC 245A switch is described as a non-reflective SP3T (Single Pole, Triple Throw) RF switch. In this paper, they used different resistors with an HMC 245A switch and it automatically calibrates AD 5933.3) Could you recommend a method, switch, or IC that if I combine it with AD 5933 and they automatically calibrate the AD 5933 and I get the correct impedance of my device from 1 ohm to 10M ohms without needing to change the feedback resistor repeatedly?Your assistance in this matter would be greatly appreciated.

author: jonpaul
author_rank: Super Contributor
timestamp: July 11, 2024, 04:55:10 am
content: Ask ADI app engineering for that eval bdj

author: thm_w
author_rank: Super Contributor
timestamp: July 11, 2024, 09:30:15 pm
content: Posted to various other sites:https://electronics.stackexchange.com/questions/719066/impedance-measurement-using-ad-5933https://forum.arduino.cc/t/frequent-calibration-problem-of-ad-5933-for-impedance-measurement/1280432
Coincidence - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: July 07, 2024, 02:01:08 pm
content: Tonight I went and got some takeaway food for the family and on the way back I turned the AM car radio on. I passed under these 432 KV powerlines and there is a pretty strong electric field as you pass under and that makes the radio go all 50Hz blurty. And I just happened to notice the song that was playing on the radio at that very moment was AC/DC‘s High Voltage. I kid you not. ⚡️🤪

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 07, 2024, 02:24:33 pm
content: Too bad it wasn't Electric Six's Danger! High Voltage

author: woody
author_rank: Frequent Contributor
timestamp: July 07, 2024, 02:59:27 pm
content: Synchronicity!

author: themadhippy
author_rank: Super Contributor
timestamp: July 07, 2024, 04:34:56 pm
content: just hope the primitives aint the next band up.

author: Kim Christensen
author_rank: Super Contributor
timestamp: July 07, 2024, 07:10:55 pm
content: When you turned onto the highway, did the song change to "highway to hell"?

author: pcprogrammer
author_rank: Super Contributor
timestamp: July 07, 2024, 07:18:57 pm
content: Quote from: Kim Christensen on July 07, 2024, 07:10:55 pmI prefer "stairways to heaven"But needs stairs instead of highway to work

author: Halcyon
author_rank: Unknown
timestamp: July 07, 2024, 11:47:46 pm
content: I think there was just a higher probability of AC/DC being played on AM radio, just for you oldies.

author: rhodges
author_rank: Frequent Contributor
timestamp: July 08, 2024, 12:11:02 am
content: Going back many decades, I do think I remember the signal going out when our car went under high power lines. Is it the electric field from the lines? Or were the lines acting as a huge antenna, perhaps sucking up the radio energy? Or some other effect?

author: Kim Christensen
author_rank: Super Contributor
timestamp: July 08, 2024, 12:20:05 am
content: I remember losing AM reception when going over bridges with the steel girder arches overhead.Same thing could happen with power lines overhead, but with that it's probably more about the EMI swamping out the signal.

author: paul8f
author_rank: Regular Contributor
timestamp: July 08, 2024, 06:20:29 pm
content: Twisted Transistor!
MOVED: Metrologic Sandbox Holography Kit 45-633 | Helium-Neon Lasers - Page 1
Forum section: electronics / general

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: July 08, 2024, 10:43:19 pm
content: This topic has been moved to Buy/Sell/Wanted because I accidentally posted on the wrong part of the forum.https://www.eevblog.com/forum/chat/metrologic-sandbox-holography-kit-45-633-helium-neon-lasers
MIL-HDBK-217F part count method reliability prediction question - solder joints - Page 1
Forum section: electronics / general

author: LeeCross
author_rank: Newbie
timestamp: July 06, 2024, 04:35:25 pm
content: I have an electronics reliability engineering question -I am doing a MIL-HBDK-217F(N2) reliability prediction using the parts count method (Appendix A). How is the reliability of surface mount and through hole solder joints accounted for? Solder joints have an extensive analysis in the part stress method, but it is not clear to me how to handle them in the greatly simplified parts count method.
My DM502A OPTION 2'd itself! - Page 1
Forum section: electronics / general

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: July 02, 2024, 11:47:13 pm
content: So I have this DM502A that has a sticker on it that says it has option 2 installed, but looking at the circuits and the front panel, it clearly does not.Option 2 is an option available for the DM502A that omits all temperature measurement related functions. Mine still had all the circuits and front panel layouts for this function. It even worked in temperature measurement mode.After a while though, the function buttons got jammed. I opened the unit up and concluded that the temperature function button had failed!After the factory's failed attempt to properly option 2 the unit, after almost exactly 40 years after it's manufacure (chip dates say mid 1984), the unit decided to option 2 itself.I find this story of mine to be quite hilarious and wanted to share.Now I have the issue of finding a replacement button or maybe fix the old one...Makes me wonder why Tek used such poor quality switches for these? They don't even align correctly with the front panel.

author: BlownUpCapacitor
author_rank: Frequent Contributor
timestamp: July 02, 2024, 11:48:06 pm
content: One more photo for the failed switch

author: Warsp
author_rank: Contributor
timestamp: July 04, 2024, 10:00:52 pm
content: I also have a option 2 DM502A that for some reason still has temperature functionality. Seeing that the free service manual is from when the DM502A was originally released, maybe Tek decided to change what option 2 did later on.
pls review my diagram - Page 1
Forum section: electronics / general

author: hikineet21
author_rank: Newbie
timestamp: July 03, 2024, 02:18:53 am
content: i want to make emergency ups like this, is this the right way to do it or should i add something in here?

author: hikineet21
author_rank: Newbie
timestamp: July 04, 2024, 05:02:21 am
content: why no one help me

author: ledtester
author_rank: Super Contributor
timestamp: July 04, 2024, 05:39:53 am
content: Generally you want the DC supply to keep the battery pack charged.For example, have a look at this design idea:DIY - 12V Mini UPS -- Sorin - DIY Electrical Nerdhttps://youtu.be/IlEnEn7ptmcSchematic available here:It uses a BMS that automatically starts supplying power from the batteries when the charging power supply is removed. The diagram looks like this:Code:┌───────┐│ ││Li-ion ││ │└───┬───┘│┌───────┐ ┌───┴───┐│ │ │ ││ 8.4V ├──┬──┤ BMS ││ │ │ │ │└───────┘ │ └───────┘│││ ┌───────┐│ │ │└──┤ DC/DC ├────OUT 12V│ │└───────┘
Tianlong-3 Rapid Unscheduled... Launch? - Page 1
Forum section: electronics / general

author: tom66
author_rank: Super Contributor
timestamp: July 01, 2024, 12:26:53 pm
content: Looks like the Tianlong-3 launched a few months ahead of schedule. A static fire test rapidly became a dynamic fire test when the clamps holding the rocket down failed somehow, resulting in the rocket launching unexpectedly. The rocket went up to about 1.5km before the lack of any flight control software led to multiple in-flight engine and structural failures.The rocket exploded when it collided with the ground (no on-board vehicle termination system on account of this not being a planned launch). This makes for perhaps the first rapid unscheduled disassembly that wasn't as a result of a planned spaceflight attempt. Someone needs to work on those ratchet straps.The populated area nearby, a few km's from the launch site, was thankfully spared and no one was killed by the collision with the ground.https://www.theguardian.com/science/article/2024/jul/01/china-tianlong-3-rocket-crash-accidental-launch-space-pioneer-gongyi

author: MK14
author_rank: Super Contributor
timestamp: July 01, 2024, 12:46:28 pm
content: There is also, this from the BBC:https://www.bbc.co.uk/news/videos/c897xl1r7v9oIt's tricky to comment about this here, without accidentally straying into politics (which can lead to disagreements and the thread being locked), so I will (try to) keep quiet.Quote

author: MK14
author_rank: Super Contributor
timestamp: July 01, 2024, 02:30:16 pm
content: Here is what seems to be an interesting, factual video about its recent demise.In it, he explains about some of the fault(s), that occur, that shouldn't.He also, contrasts it, to SpaceX's thing(s) (Falcon 9), which he is saying, they are a clone of. It is around 10 minutes 38 seconds long.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: July 01, 2024, 03:30:20 pm
content: I know I know wrong guy but whatever

author: amyk
author_rank: Super Contributor
timestamp: July 01, 2024, 09:08:37 pm
content: Someone made a conversion error between PMPO and actual power?

author: RJSV
author_rank: Super Contributor
timestamp: July 02, 2024, 01:30:19 am
content: A couple of relatives had gotten PREGNANT, unexpectedly, THAT WAY. No pre-planned procedure, for handling, when things just 'Take Off'.Crash was delayed, until next morning.True, I swear!

author: Whales
author_rank: Super Contributor
timestamp: July 02, 2024, 02:09:40 am
content: Kerosene and liquid oxygen sounds polarised. They need to pay attention to the silkscreen on the launch pad.

author: Someone
author_rank: Super Contributor
timestamp: July 02, 2024, 02:18:23 am
content: Quote from: amyk on July 01, 2024, 09:08:37 pmReal world: using a fractional margin of safety (as is typical for spacecraft and cargo) where inappropriate
A very good YouTube video on where Electromagnetism comes from. - Page 1
Forum section: electronics / general

author: hamster_nz
author_rank: Super Contributor
timestamp: July 01, 2024, 09:51:54 pm
content: Electromagnetism as a Gauge Theory"Why is electromagnetism a thing?" That's the question. In this video, we explore the answer given by gauge theory. In a nutshell, electromagnetism arises from local phase symmetry. But what does that mean, and how exactly does that work? That's what this video is all about!It's 3 hours long, and has some advanced math that is beyond me at the moment, but I'm about an hour in and it is offering insights.
Resistor application Rating  - Page 1
Forum section: electronics / general

author: gogoman
author_rank: Regular Contributor
timestamp: June 29, 2024, 06:45:21 am
content: Hello, SMD thick film resistors can be selected by application, Commercial Vs General Purpose Vs Industrial. The over voltage, max/min temperature and temperature coefficient are either same or similar.In general, What is the different between the three applications, when is it appropriate to chose one over the other and is there one to avoid?thanks gogo

author: TimNJ
author_rank: Super Contributor
timestamp: July 01, 2024, 11:03:08 pm
content: Quote from: gogoman on June 29, 2024, 06:45:21 amExample datasheets? Are they all from the same manufacturer? If so, could be something about how they are qualified. Headline specs may be the same, but could be tested with different environmental conditions -- e.g. damp heat with load, endurance, short term overload, etc. (usually tested to some IEC or JIS standard).
Good read on "enshittification" of tech - Page 1
Forum section: electronics / general

author: bdunham7
author_rank: Super Contributor
timestamp: June 30, 2024, 02:56:53 am
content: https://www.ft.com/content/6fb1602d-a08b-4a8c-bac0-047b7d64aba5

author: MK14
author_rank: Super Contributor
timestamp: June 30, 2024, 03:12:15 am
content: Also a good example of paywalled and/or you MUST register to read it.Quote

author: brucehoult
author_rank: Super Contributor
timestamp: June 30, 2024, 03:18:17 am
content: It's been previously discussed, and the paywalled text posted, at....https://new.reddit.com/r/Futurology/comments/1amp65h/comment/kpmz3dy/As the for author ... I enjoyed "Down and Out in the Magic Kingdom" when it came out, but he's wrong about practically everything in the real world. Other than privacy stuff, where he sometimes, but not always, has a point.

author: bdunham7
author_rank: Super Contributor
timestamp: June 30, 2024, 03:43:32 am
content: Thanks, I had no idea it was paywalled and no idea why I have access to it.I don't know that I'd agree with the authors views on everything but I agree with a lot of what he's written here.

author: MK14
author_rank: Super Contributor
timestamp: June 30, 2024, 03:47:19 am
content: Quote from: bdunham7 on June 30, 2024, 03:43:32 amI'm guessing. But sometimes such websites, allow a certain number of 'free' accesses/reads of articles. E.g. 2.Then once you exceed that limit, it nags and nags you until you either pay for a subscription, register for free (if they let you), or give up on reading the article(s).

author: MK14
author_rank: Super Contributor
timestamp: June 30, 2024, 04:52:58 am
content: Quote from: quince on June 30, 2024, 04:07:42 amFair enough. But if I read a thread, I expect it to have details about it (the thread), already in it. Not need to have to buy a subscription, just to find out what exactly a thread is about.But as the OP explained, it was an unknown thing, to them, at the time of making this thread.

author: bdunham7
author_rank: Super Contributor
timestamp: June 30, 2024, 05:09:41 am
content: Quote from: quince on June 30, 2024, 04:07:42 amGiven the subject, the author and his stance on these issues, that's pretty hilarious!
Electrically unbonding adhesive - Page 1
Forum section: electronics / general

author: Bud
author_rank: Super Contributor
timestamp: June 29, 2024, 03:12:02 pm
content: Interesting information and a demo of a new adhesive material that can be unglued by applying some voltage across.https://www.theverge.com/2024/6/28/24188099/apple-might-try-electrically-induced-adhesive-debonding-on-iphone-batteries
supply power to a chinese d class amplifier - Page 1
Forum section: electronics / general

author: walker1234
author_rank: Newbie
timestamp: July 02, 2024, 05:21:58 pm
content: Hi everybody,I had bought this amplifier from aliexpress some times ago the model is zk-mt21.The amplifier accept a tension from 12 to 24 volt for supply, as you can see in the image there is a 25 voltage electrolitic capacitor.The problem is that I want to give supply from two lead acid battery and the voltage of the battery can go from 23 when empty and 27 when charging from the solar panel.I connect my amplifier to a 22volt power supply and I see that rarely it consume more than 1.5 ampere continuosly.I want to use some 10A diode in series of my amplifier to lover the voltage for that 3 volt.But every time I search for lower voltage with diode everybody become crazy because of inefficienty.I know I can use a dc dc converter for lover the voltage to 18 volt, but I want my setup to be simple, and a step down that can handle 10A is a bit too much for that.Everyone have some suggestion? thanks

author: tom66
author_rank: Super Contributor
timestamp: July 02, 2024, 05:58:37 pm
content: Replace the 25V capacitor with a 35V one?You would need to make sure the electronics inside can withstand 28V, but chances are they just cheaped out on the capacitor and selected the closest one that met the requirement of 12-24V input.

author: mariush
author_rank: Super Contributor
timestamp: July 02, 2024, 06:48:14 pm
content: Open the lid and see what actual chips are they using , and if they're using voltage regulators.It's possible the amplifier chip supports higher voltages in which case you wouldn't need to add diodes, you'd just have to replace those 25v rated capacitors with capacitors rated for higher voltage.

author: walker1234
author_rank: Newbie
timestamp: July 02, 2024, 09:53:15 pm
content: the amplifier chip is a CS8673E i attached the datasheet, it seem like the chip can handle 26 volt max.Maybe I can use a 50V capacitor instead an connect directly the voltage supply

author: retiredfeline
author_rank: Frequent Contributor
timestamp: July 02, 2024, 11:12:42 pm
content: Or just buy a new class D amplifier that can accept higher supply voltages and save this one for other uses. They are so cheap these days.

author: walker1234
author_rank: Newbie
timestamp: July 03, 2024, 06:02:56 pm
content: I just take the suggestion from retiredfeline, and bought the model zk-ht21 more powerful and can handle up to 36v.I fell safer like that, instead of use the amplifier at the maxium rated voltage.thank you all!
Soviet 68000 CPU bit slice implementation? - Page 1
Forum section: electronics / general

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: June 25, 2024, 11:31:43 pm
content: From what I find about Soviet CPUs and the Motorola 68000:* The import of 32 bit CPUs (including the Motorola 68000) was restricted under COCOM.* No Soviet clone of the 68000 is known, but a related part being the Motorola 68881 FPU has a Soviet clone.* Apollo/Domain used a bit slice implementation (AMD 2900 family) of the Motorola 68000 in some of their workstations.* A number of members of the AMD 2900 family has Soviet clones.Does anyone know of a Soviet bit slice implementation of the 68000?

author: SiliconWizard
author_rank: Super Contributor
timestamp: June 26, 2024, 12:40:11 am
content: Well, this doesn't answer your question, but modulates a bit the fact that they never used any 68k: there was the Besta workstation, with a 68020:https://en.wikipedia.org/wiki/Besta_(computer)

author: Canis Dirus Leidy
author_rank: Regular Contributor
timestamp: June 26, 2024, 06:29:44 pm
content: Quote from: Scratch.HTF on June 25, 2024, 11:31:43 pmWAT? If you are talking about КА1801ВМ4/КН1801ВМ4, then it was an original domestic design. And Л1839ВМ2 reverse engineered VAX-11 FPU.

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: June 27, 2024, 02:49:24 am
content: Quote from: Scratch.HTF on June 25, 2024, 11:31:43 pmI used an Apollo DN660 for a short time. As far as I can remember it was a clone of the 68020, or possibly a 68010 not a 68000.
Buy LG, Samsung, Panasonic, roofer, eve 18650 batteries online and see what the  - Page 1
Forum section: electronics / general

author: ASICS
author_rank: Contributor
timestamp: June 25, 2024, 09:40:04 am
content: I'll put the test data downstairs. The picture is taken from the video and is a bit blurryBatteries were purchased from 5 suppliers, 1 passed, 1 was up to standard and 3 were fake.Subsequent to finding a way to make this battery, I purchased some of the materials back.

author: ASICS
author_rank: Contributor
timestamp: June 25, 2024, 09:43:43 am
content: Test resultsBattery fully charged 4.2VDischarged 2.8V, 1A

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 25, 2024, 12:18:19 pm
content: Looks like the LG and Panasonic are counterfeit or old stock, genuine new ones wouldn't perform that poorly.

author: RoGeorge
author_rank: Super Contributor
timestamp: June 25, 2024, 12:42:14 pm
content: Not counterfeits. Most probably the measurement didn't follow the specifications from the each battery's datasheet.Each manufacturer specifies the exact conditions for how to charge and how to discharge their battery in order to get the Ah, by each model of battery. If not done as in the datasheet specifications, there will be different results.Otherwise, it will be like measuring the volume of air from a car tire, and saying the envelope is fake. It depends of the pressure it was inflated, and the temperature.Similar, the Ah written on a battery is not an exact value. The Ah is a number specific to the charge-discharge process, the currents used, and to the internal temperature of the battery.

author: wraper
author_rank: Unknown
timestamp: June 25, 2024, 12:43:30 pm
content: Quote from: RoGeorge on June 25, 2024, 12:42:14 pmNot counterfeits... just recycled and re-wrapped e-waste.

author: tunk
author_rank: Super Contributor
timestamp: June 25, 2024, 01:11:01 pm
content: A couple of these has been tested by EEVblog member HKJ:https://lygte-info.dk/https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-20R%202000mAh%20(Green)%20UK.htmlhttps://lygte-info.dk/review/batteries2012/Panasonic%20NCR18650B%203400mAh%20(Green)%20UK.html

author: mendip_discovery
author_rank: Super Contributor
timestamp: June 25, 2024, 04:57:39 pm
content: Use until discharged, re-charge, and test.Do the above 10 times even before claiming a battery tester is right.

author: ASICS
author_rank: Contributor
timestamp: June 26, 2024, 03:41:57 am
content: Quote from: tunk on June 25, 2024, 01:11:01 pmThanks for the correct values for these batteries!

author: ASICS
author_rank: Contributor
timestamp: June 26, 2024, 03:46:07 am
content: Quote from: mendip_discovery on June 25, 2024, 04:57:39 pmThe results are similar for as many times as they are carried out again. They are is recycled and re-wrapped e-waste.
New Starship factory tour. - Page 1
Forum section: electronics / general

author: wraper
author_rank: Unknown
timestamp: June 23, 2024, 12:48:25 am
content: Still getting build but it's huge and there is some interesting stuff to see, actual factory more at the end of the video. They want it to run like a car production line, churning out more than 100 starships a year. Interestingly they'll also make almost 200 Falcon 9 second stages this year

author: coppercone2
author_rank: Super Contributor
timestamp: June 23, 2024, 01:35:39 am
content: I heard this was almost ready in 3 months in like sept 2020 lol.

author: wraper
author_rank: Unknown
timestamp: June 23, 2024, 02:29:21 am
content: Quote from: coppercone2 on June 23, 2024, 01:35:39 amReady what? Back then they were building early Starship prototypes basically in empty field with a tent.

author: wraper
author_rank: Unknown
timestamp: June 25, 2024, 04:15:45 pm
content: Part 2
Siemens? WebTXS20 WinCE HMI - Copy Software - Page 1
Forum section: electronics / general

author: kolbep
author_rank: Frequent Contributor
timestamp: June 23, 2024, 08:42:07 pm
content: Good DayOnce again I need to call on the pool of EEVBloggers.I had another Industrial Machine that had a Windows 3.1 Based HMI that touchscreen failed. That machine had PS2 Keyboard Port and Serial Port. The CF Card was not able to be read in any reader I tried, however I was able to use Dos' Interlnk and Intersvr to pull the complete contents of the drive off, and moved it onto a Windows XP Based HMI. And that worked perfectly.I have another machine now, that has a WebTXS20 based HMI, that also has problems with its touchscreen. Suppliers have quoted over 5500USD for a new HMI.I was hoping that I could do the same thing. This HMI is Windows CE Based, so I was hoping I could also get the software to run on an XP based HMI (or a VM or something).The HMI communicates to the PLC with Ethernet.However there is no CF Card, the software is stored straight on the Flash / Nand Memory on the board. There is also no Keyboard Interface. There is just a 9 Pin Male, 9 Pin Male, Ethernet, Power, and some pin headers. As the machine is still in use with the dodgy hmi, I cannot risk having it out of service, or damaging it (so pulling the memory and extracting it's contents is too risky).I have tried to look up the WebTXS20, but I am only coming up with a few ones for sale. I cannot find any way that the software can be up/downloaded to the units.I was wondering if anybody had experience with these units, and how to extract or download the software from them.My other recourse will be to try get into it over the Network interface, however I doubt it will be that easyWill appreciate any assistance.Pictures of the inside of the unit are here :https://photos.app.goo.gl/KdjJXuVmCqGps26g7
Radio streaming to existing amplifier - Page 1
Forum section: electronics / general

author: TimFox
author_rank: Super Contributor
timestamp: June 18, 2024, 07:27:06 pm
content: Does anyone know of a commercially-available single device that can connect through WiFi to the internet feed of a radio station and drive the AUX inputs on an existing stereo system.The ones I found through search require an external computer or other device to do the web browsing, but I want a single box that I do not have to program past browsing to the station's website.

author: BrianHG
author_rank: Super Contributor
timestamp: June 18, 2024, 08:34:21 pm
content: Try google: 'internet radio tuner'Amazon turned this guy up:Internet Radio and FM tunerAlso try:https://www.av-connection.com/?ML=218and:https://www.sangean.com/en/product/wft-4-black

author: tggzzz
author_rank: Super Contributor
timestamp: June 18, 2024, 08:41:33 pm
content: In my ignorance, I imagine the UI is important. Having a computer application would give a decent UI, and it would be useful for more than just radio.If USB to audio is OK, then High Resolution Technologies make decent DACs, e.g. the HRT MUSICStreamer II.I see some are available on fleabay.

author: TimFox
author_rank: Super Contributor
timestamp: June 18, 2024, 08:59:49 pm
content: Quote from: BrianHG on June 18, 2024, 08:34:21 pmThe Ocean-Digital WR-10 unit found under "internet radio tuner" looks like what I wanted.

author: TimFox
author_rank: Super Contributor
timestamp: June 18, 2024, 09:02:44 pm
content: Quote from: tggzzz on June 18, 2024, 08:41:33 pmOf course, I already have computers, including a laptop I use with my TV set, including an external DAC. I was hoping for a small single-purpose box.

author: NiHaoMike
author_rank: Super Contributor
timestamp: June 18, 2024, 10:20:08 pm
content: You'll be best off with a Raspberry Pi or similar running open source software, see the Sonos fiasco for an example of what often happens to IoT media gadgets in the long term.

author: bingo600
author_rank: Super Contributor
timestamp: June 23, 2024, 03:07:37 pm
content: If you had been in EU'land i'd have recommended a TechnisatI have a Digitradio10 IR , and i works real nice.Digitradio 10 IRhttps://www.amazon.de/-/en/TechniSat-Digitradio-Digital-Radio-Adaptor/dp/B087XNQK7Y/Digitradio 11 IR - Afaik just bigger Screenhttps://www.amazon.de/-/en/TechniSat-DIGITRADIO-11-Bluetooth-Upgrading-Black-silver/dp/B0CSPNQTNH/https://www.technisat.com/en_XX/DIGITRADIO-10-IR/352-10774-22920/Ohh ... Watch out - ItMUSThaveIRin the model nameEdit :I both have Raspi's w. DAC & a "Converted linux mediaplayer".Both works fine, but the wife thinks they're complicated, ie. webpage login for changing channel ...So i wanted something "standalone" with a Screen & a Remote
How to use 3 axis graph - Page 1
Forum section: electronics / general

author: soldar
author_rank: Super Contributor
timestamp: June 23, 2024, 10:32:50 pm
content: I have no idea how to read or use this type of graph.Suppose I have a mixture 50% methane, 30% nitrogen, 20% oxygen. How do I find the corresponding point in the graph?

author: Andy Chee
author_rank: Super Contributor
timestamp: June 24, 2024, 01:25:47 am
content: I have marked your coordinates below:

author: tooki
author_rank: Super Contributor
timestamp: June 24, 2024, 01:36:17 am
content: I’ve never used this type of graph before either, but based on the 12% oxygen as a clue, I suspect this is how it’s read. (And it seems to agree with Andy’s interpretation.)

author: soldar
author_rank: Super Contributor
timestamp: June 24, 2024, 08:18:41 am
content: Quote from: Andy Chee on June 24, 2024, 01:25:47 amOK, thanks, I think I understand. So there are two sets of lines leaving from each side but only one set applies to that side.So I start with the percentage for methane and always follow the horizontal line, not the line that slopes downward. And I follow that line until I hit the nitrogen line which is only the ones sloping down and backwards and that necessarily will correspond to the Oxygen level which will be following the line which slopes down and forward.So of the three sets of lines only one set applies to each "axis".I think I got it. Thanks.

author: ArdWar
author_rank: Frequent Contributor
timestamp: June 24, 2024, 08:50:11 am
content: With ternary plot like this the three axes are not independent of each other.x+y+zalways add up to 1, so for a given value there are only one intersection that makes sense.It should be obvious when you trace the wrong line. For example incorrectly following the 50% methane line downward until you meet the (also incorrect) 30% nitrogen line will leave you with either 70% or 50% oxygen.To aid with interpretation, the chart's scale are usually not printed perpendicular like your example, but slanted to "continue" the correct lines (ex. oxygen scale should be rotated 30 degree CCW, nitrogen rotated 30 degree more CCW, methane 30 degree more CW).Because of course there are people who draw the chart the other way around...

author: soldar
author_rank: Super Contributor
timestamp: June 24, 2024, 09:08:15 am
content: Quote from: ArdWar on June 24, 2024, 08:50:11 amYes, I realize all three have to add up to 100%The graph you post is much more intuitive because it shows the lines of the three axis in different colors so you know what color line to follow.
Best Christmas gift this year? - Page 1
Forum section: electronics / general

author: iceteavanill
author_rank: Newbie
timestamp: December 24, 2020, 07:38:23 pm
content: What what is your best Christmas present ( related to electronics ) this year? (does not matter if you gifted it or you got it gifted)I got this "Smart KIT No. 1086 car's music to light" Kit from my brother. It is more a sentimental gift than practical one.

author: victorb
author_rank: Contributor
timestamp: June 18, 2024, 10:54:20 am
content: My macbook was the best gift. I've really wanted it for a long time.

author: arjen
author_rank: Contributor
timestamp: June 19, 2024, 11:03:27 am
content: My best Christmas present this year was actually from my dad. He gave me a wakizashi, a traditional Japanese short sword. It might not be electronic, but it’s definitely the best gift I've received.

author: victorb
author_rank: Contributor
timestamp: June 21, 2024, 07:29:52 pm
content: A VR headset! It's so much fun.

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: June 22, 2024, 02:54:43 pm
content: From my lovely wife.

author: themadhippy
author_rank: Super Contributor
timestamp: June 22, 2024, 03:46:59 pm
content: For sevral years ive always got exactly what ive asked for, bugger all.