hybridfree/eevblog-posts huggingface dataset:
Ham radio operator using Rigol DS1054z needs trapezoid pattern - Page 1
Forum section: electronics / beginners

author: w1ss
author_rank: Newbie
timestamp: October 21, 2018, 04:28:46 pm
content: I am a ham radio operator (W1SS) and I purchased two taps fromwww.cleanrf.com. One comes out of the transmitter and one comes out of the amplifier. I have a Rigol DS1054z and I am a beginner. I cannot get the trapezoid pattern that is described on the "applications" tab of the cleanrf website. I called the vendor and he said that I should use a Tektronix 2213. I want to get this to work with the DS1054Z. I am at my wits end. I am able to set to XY mode bit the best I can get is a circular type image instead of a triangular one. I would appreciate any help.

author: ConKbot
author_rank: Super Contributor
timestamp: October 21, 2018, 04:46:35 pm
content: Their application note is using a detector/ AM demodulator on the amp input to get an audio-frequency input, and a tap on the RF output. You say you are using two taps though. With two signals of the same frequency (the RF in this case) in XY mode youre going to get anything from a diagonal line, to a circle, depending on the phase.

author: janoc
author_rank: Super Contributor
timestamp: October 21, 2018, 05:16:51 pm
content: Quote from: ConKbot on October 21, 2018, 04:46:35 pmI think he means the RF-D "tap" which also demodulates and RF-S which is an RF sampler.I would first verify that the scope is set up properly in XY mode. The instructions on the website are written for an analog scope and the "helpful" advice to use Tek 2213 points towards that too. However, there is no reason this sort of measurement couldn't be done on the Rigol too.I would set the scope in XY mode first.* Menu button above the time base knob, select timebase "XY".* Make sure channel 1 and 2 are selected as sources (same menu)* Enable channels 1 and 2 using the channel buttons, set coupling to DC on both (right hand soft buttons)* Set sensitivity to 2V/div using the voltage level knob (next to the channel buttons) on each channel (press channel button, turn knob, press second channel, turn knob)* In the same channel menu set the probe to "1x" if you had "10x" selected (the taps are connected by coax, there is no 1:10 divider in them). If you don't do this, you will see 10x higher voltages shown on the scope but it shouldn't really matter for this measurement - just make sure both channels are the same.If there is nothing connected to the inputs you should see a dot in the middle of the screen. Now touching the probes should draw a line, either horizontal (if you touch CH1 probe) or vertical (if you touch CH2).Connect your taps and you should be able to see something. You probably won't see a nicely filled trapezoid like that because the Rigol doesn't have so much phosphor persistence as an analog scope (and you can't turn persistence on in the XY mode) but you should be able to see something at least. You may have to turn on the brightness too. What is important is the outside shape, not so much the fill.I haven't tried this measurement myself but I have the same scope.
ham radio shack, battery powered - Page 1
Forum section: electronics / beginners

author: gabric098
author_rank: Newbie
timestamp: August 28, 2024, 11:54:33 am
content: Hi everyone,recently I've been exploring the option to power my ham shack (used almost exclusively as receiving station), using battery power.The reason for going battery is that one of my hobby is to chase NDBshttps://en.wikipedia.org/wiki/Non-directional_beacon, those signals are quite faint and it's crucial to reduce the electrical noise to the minimum.All is super simple when it comes to the appliances powered with 12v. I'll just use a lead battery or if I want to spend some more money, I'll go for a LiFePO one.The tricky part, at least for me, it's how to power the 5v devices.In particular: I've got a couple of active antenna amplifiers that are powered via USB cables. I could use 2 cells LiFePO but the voltage would be higher than 5v. I could then add a stepdown voltage regulator (there are many sold on aliexpress), however I'm asking: do these devices add noise to the powerline? I'm trying to use batteries mainly for reducing the noise to the minimum and I would like to avoid to use batteries and then have noise added by the stepdown voltage regulator.Thanks for your helpGabDISCLAIMER: I'm not an electronic expert, my knowledge is limited but I'm trying to improve. Try to explain things in simple terms like you were talking to your 10 years old son.

author: Phil1977
author_rank: Frequent Contributor
timestamp: August 28, 2024, 12:57:13 pm
content: How much power do the antenna amplifiers need?To answer your question, yes the step-down-converters can create noise, some of the cheap ones can really be bad.But you can easily get around it: Use linear voltage regulators for everything below a few watts of power consumption. Just get a heatsink, a 7805 and a 100nF cap. Or buy a linear voltage regulator module, you can also take an adjustable one with the good old LM317T.Be careful with regulator modules with LED displays, some of the displays are also emitting lots of noise.As soon as everything is working you can try the step-down-module and see / hear if it makes a difference.

author: gabric098
author_rank: Newbie
timestamp: August 28, 2024, 02:06:52 pm
content: Quote from: Phil1977 on August 28, 2024, 12:57:13 pmHi Phil1977.It's rated for 750mA @ 5vThank youGab

author: Phil1977
author_rank: Frequent Contributor
timestamp: August 28, 2024, 02:43:31 pm
content: That means your linear voltage regulator would need to dissipate up to 5W. Should be absolutely fine if you attach it with an insulator to a small metal housing or to a heatsink that´s better than 10K/W (lower is better).

author: gabric098
author_rank: Newbie
timestamp: August 29, 2024, 01:43:18 pm
content: Thank you for the reply, I'm working on it.Now, another, possibly more tricky question: I often use this SDRhttps://www.sdrplay.com/rspdxr2/. It connects to a laptop via USB cable. Now, would be technically viable to power it via battery and keeping the USB cable just for data?Thank you!Gab
Hameg 604-3 test waveform - Page 1
Forum section: electronics / beginners

author: pcolbeck
author_rank: Contributor
timestamp: August 09, 2020, 09:41:39 am
content: HiI'm a beginner just buying my first lab equipment. I have bought a Hameg 604-3 oscilloscope on eBay that the vendor didn't know if it worked or not (inherited and they weren't a technically inclined and didn't know anything about scopes) the photos showed that the LEDs on the control panel lit up OK but there was nothing on the CRT. As yet I have no signal generator.So the question is does the 604-3 have the ability to generate a test waveform itself so I can check if it works?If it doesn't it was cheap so no huge loss but it would be nice to be able to quickly determine if its a completely dud or not.Thanks

author: MosherIV
author_rank: Super Contributor
timestamp: August 09, 2020, 10:55:24 am
content: HiYes, most scopes have a test square wave signal to allow correct adjustment of scope probes.On the Hameg 604-3 the test signal is just below the crt on the far left.

author: pcolbeck
author_rank: Contributor
timestamp: August 09, 2020, 12:05:02 pm
content: Smashing.Many thanks.

author: bd139
author_rank: Super Contributor
timestamp: August 09, 2020, 12:16:10 pm
content: A lot of scopes have minor issues which are fairly easy to correct. Check the panel controls are set up first properly and try and get a stable single channel trace out of it first. You don’t need a test signal for that. If that fails various forum members here can probably talk you through an evaluation and/or repair.If you’re new to this, post a picture of the entire front panel with it powered up to see what situation is.It’s a very nice analogue scope when it’s working so worth pursuing a repair if needed.

author: pcolbeck
author_rank: Contributor
timestamp: August 09, 2020, 07:42:54 pm
content: Thanks I will.I started a degree in Electrical engineering back in the early 80s but dropped out and fell into computing and have been a network engineer for over 30 years. So I am not completely clueless on the basics of electronics but its been a very long timeNever thought back then that it would be possible to own the kind of kit you can now for a home lab, its amazing really,

author: bd139
author_rank: Super Contributor
timestamp: August 09, 2020, 07:47:14 pm
content: Did exactly the same thing hereHaven’t had an EE job for 21 years now I think it is.
HAMEG  HM305-2  - Page 1
Forum section: electronics / beginners

author: Cobra-m
author_rank: Newbie
timestamp: February 26, 2012, 10:03:31 pm
content: Is hameg305 a ok beginner scope ? (first scope) the one I have on hand is arund 200 usd is that ok ?

author: Tube_Dude
author_rank: Regular Contributor
timestamp: February 26, 2012, 10:18:46 pm
content: Hi love Hameg scops. I have a HM1004 and i'am very pleased...

author: Unknown
author_rank: Unknown
timestamp: February 26, 2012, 10:59:33 pm
content: In my opinion $200 is quite expensive for a 35 MHz scope. Granted, it also has a limited digital mode (only 100 MS/s / 2 kpoints), but I'd rather get a purely analog scope with more bandwidth for less money or a modern digital scope for a little over $300 (what's the street price of a Rigol DS1052E these days?). But if it's all that is available (locally), it should be a decent scope when in good condition.

author: harnon
author_rank: Regular Contributor
timestamp: February 26, 2012, 11:06:07 pm
content: At uni we have theHameg 203-6scopes... they are looking a bit worse for wear but aren't too bad for simple tasks. They are only 20Mhz but I"m pretty sure I've seen them on ebay for under 50 quid. Compared to this $200 does seem a bit expensive.EDIT: just noticed the "-2" in your subject line so no longer need to sayQuote

author: Cobra-m
author_rank: Newbie
timestamp: February 27, 2012, 08:06:06 am
content: I know that on eBay i Can get lower prize but i have to pay like 200 USD In shipping to Denmark on an crt Unit and have to pay 30% In tax off the prize and the shipping to get stuff legal In to Denmark if ship from outside the eu
Hameg HM412-5 Oscilloscope problem - Page 1
Forum section: electronics / beginners

author: DarkZero
author_rank: Regular Contributor
timestamp: January 16, 2012, 11:01:30 am
content: Hey guysThe other day i went to the old stuff market and saw this oscilloscope for 20 euros and the guy said it worked and i took the gamble and bought it. When i got home i hooked it up and it worked indeed, so i played with it for a couple of days to see if anything is wrong with it but guess it was working just fine. but yesterday when i was playing with it suddenly i lost the line on the screen and i thought it died but then i looked at it better there was still a line but it is very very fade i tried turning the intensity and focus knobs but it had very little effect on it, it is still hard to see. So i opened it up to check if anything burned by the looks i found nothing, next thing i planed to re-solder the things around the CRT then ill check voltages coming out of the transformer. Well that's as good as i can do if any tips or help would be awesome also ill attach Schematic of the thing maybe someone will get some idea what to check or dolink to the service manualhttp://www.hameg.com/typo3conf/ext/hm_downloads/pi1/download.php?uid=5291thx in advance

author: w2aew
author_rank: Super Contributor
timestamp: January 16, 2012, 03:03:54 pm
content: My first guess would be that you lost the acceleration voltage for the CRT. The manual says that this is -1900Vdc. If you don't have a suitable probe and meter to check this SAFELY, then you're better off having someone else look at it. It can be VERY dangerous if you don't have the right high voltage equipment. If you have the right equipment, then I'd start with checking the operating voltage listed on page 32 of the manual.

author: DarkZero
author_rank: Regular Contributor
timestamp: January 16, 2012, 03:54:50 pm
content: well its one of the reasons i didn't check the voltages on the CRT because my multimeter goes to 1kV. Guess that fixing it is beyond my possibilities. Well i guess ill check parts along the line of that -1900Vdc maybe i get lucky until i gather money for repairs.thx for the answer atleast it narrowed the problem
Hameg HM605 Damged - DOH! - Page 1
Forum section: electronics / beginners

author: gbot
author_rank: Newbie
timestamp: November 23, 2013, 08:51:49 pm
content: Good- day,I have been lurking around forums for some time and love EEVBLOG! Today I ran into an issue and require the assistance of one of the Gurus.We were experimenting with a recently acquired HM605 scope and made a fatal mistake during the measurement of AC line voltage. The ground of the probe was connected to one side of the 120V wall outlet, there was a tiny spark and the scope went dead. The intent was to view the 60Hz waveform however the result was not good.I checked the unit for fuses and found/replaced the only one that I could find - no luck. Does anyone with experience know what happened and what may have been damaged in the scope?Cheers!gbot

author: madires
author_rank: Super Contributor
timestamp: November 23, 2013, 10:42:39 pm
content: Please watch:

author: Nerull
author_rank: Frequent Contributor
timestamp: November 23, 2013, 10:46:23 pm
content: Scopes do not work like multimeters. They do not float - scope ground is earth ground. If you connect it to an unisolated live voltage you're going to blow something up.A grounding wire or trace inside the scope may have melted/vaporized, acting like a fuse.It is essential to be aware of where you connect a scope ground. Never, ever connect it to anything other than an earthed ground unless the DUT is fully isolated, and before you use an isolation transformer you should learn about the other dangers they create.

author: chasxmd
author_rank: Contributor
timestamp: November 24, 2013, 01:36:34 am
content: I don't know your Oscilloscope but perhaps you can see if your scope had a MOV that blew? It's kinda there job if they're installed. Many MOVs look like thick through-hole disc ceramic capacitors. I assume it's totally dead as-in hopefully something in the power supply? I would guess you'd still get some lights on if you just blew out your front end, not saying your didn't do that too. Good luck!

author: Rigby
author_rank: Super Contributor
timestamp: November 24, 2013, 03:53:57 am
content: in the future, use two probes, not the ground leads, just the tips, and set the display to add the channels. I forget if you need to invert channel 2 or not...

author: gbot
author_rank: Newbie
timestamp: November 25, 2013, 02:44:48 am
content: Thanks for the replies!There is absolutely no power, lights, nada. I should have checked before playing. Hopefully it's something in the power supply such as a MOV. The failure was very uneventful and barely made any noise and no smoke. The noise made was similar to a power supply thump when a load is introduced.I will take the unit apart and poke around.Thanks so much.

author: oldway
author_rank: Super Contributor
timestamp: November 25, 2013, 09:28:59 am
content: It's probably a blowed track on one of the print boards.You should find it easily by visual inspection as they are single side PCB'sHM605 are very fine scopes.Good luck.
Hameg HM605 Ready To Go - Page 1
Forum section: electronics / beginners

author: JCEEVBLOG
author_rank: Newbie
timestamp: October 07, 2018, 01:24:40 pm
content: Hi allI have cleaned up the entire fascia (looks like new) remove all dust from outside/in. I have cleaned all the pots and switches and put it back together.Switched it on and all is well. I don't have any probes yet they arrive tomorrow so here's a question for you.Whats the first things I should do when I get my probes to test the scope or calibrate things?Regards

author: CJay
author_rank: Super Contributor
timestamp: October 07, 2018, 02:46:53 pm
content: Check the 'scope works, that it trigger, that you can compensate the probes, get used to using it.

author: JCEEVBLOG
author_rank: Newbie
timestamp: October 07, 2018, 03:36:24 pm
content: That you can compensate the probes?Is that the same as attaching them to the test point on the scope?I will get googling as this is all new to me :-)

author: CJay
author_rank: Super Contributor
timestamp: October 07, 2018, 07:47:26 pm
content: Honestly?The best thing you can do is read the manual, Hameg do good manuals with lots of info in them.Probe compensation is adjusting the probes so the 'scope displays a square wave from the test point on the front of the 'scoope.

author: JCEEVBLOG
author_rank: Newbie
timestamp: October 07, 2018, 11:30:42 pm
content: Yes I read that in the manual before I saw your post so appreciate your comment.Am on the case and regards the start of your post 'honestly' this is all new to me 100% as I am sure you wouldn't know where to start regards setting up a new Windows domain with Exchange/SharePoint and SQL servers etc.etc.!!Regards

author: CJay
author_rank: Super Contributor
timestamp: October 08, 2018, 06:27:42 am
content: Oh dear.You're sure of that are you?Really?You have no idea what my day job is or where I work, yet you're sure I have no idea how to point and click a Windows domain and services into life.We're done here.
Hameg HMO722 vs Rigol DS2072 - Page 1
Forum section: electronics / beginners

author: hendrix
author_rank: Contributor
timestamp: July 24, 2012, 10:23:30 am
content: Hello,Im looking to buy a general purpose oscilloscope for my hobby needs. I cant spend too much and the models listed in the title were the ones that I was able to select from the market that would fit (more than) my needs in terms of specs and seemed advanced (future prrof for a while) and simple (in terms of usage). What I am looking for is:- Good quality, as much as I can buy- Big screen- 2 channels, dont think I would need 4, but not sureOther than that, I dont know what I need more that this or what I should look for. I mostly do amplifiers, crossover networks, power supplies and loudspeaker stuff in general and check some basic electronics.What do you guys think in terms of the models listed in the title? Or, do you have alternative suggestions?Thanks.

author: hendrix
author_rank: Contributor
timestamp: July 27, 2012, 09:24:54 pm
content: anyone?

author: dean
author_rank: Newbie
timestamp: August 21, 2012, 09:22:33 am
content: HMO722 is pretty good, but not price. in my opinion, If you want oscilloscope for Hobie, you can got 100Mhz 2 channels and and additional logic analyzer. As example, Rigol DS1102E 100MHz, LA1016 Logic Analyzer 16 channels. I think that should be enough for a hobby.But HMO722 is real pretty good.Rigol DS2072 is also good, but i think reasonable to wait until this model does not ride and do not correct errors in it.

author: T4P
author_rank: Super Contributor
timestamp: August 21, 2012, 01:48:33 pm
content: I think you made a small mistake there1) It's the D version that has the Logic Analyzers2) HMO722 has the 2GS ADC and the DS1102D won't be able to compete3) The DS1102D is not cheap anyway.4) DS2072 has all the goodies 14Mpt, 2GS and 50k refresh rateWell clearly these aren't good for first scopes if you need your first scope anyway it would the the DS1102E or the SDS7102 or the Hantek DSO5062 5102 5202
hand across power rail reduces jitter in astable multivibrator - Page 1
Forum section: electronics / beginners

author: MrRadiotron
author_rank: Contributor
timestamp: October 04, 2014, 10:16:53 am
content: Hi there,I'm playing with an astable multivibrator made from a 74HC14 Schmitt hex inverter on a bread board.When looking at the output on a scope there is a lot of jitter.The chip is decoupled, but as a gut reaction I stuck on a small ceramic cap on to see if that would help.The extra cap didn't reduce the jitter,but I noticed as I inserted it in the bread board that when my finger and thumb bridged the power rail,the jitter reduced significantly.what effect would my hand have on the power rail?I tried increasing the load on the power rail, to no avail.any insights are appreciated!

author: tggzzz
author_rank: Super Contributor
timestamp: October 04, 2014, 04:21:40 pm
content: Quote from: MrRadiotron on October 04, 2014, 10:16:53 amWhat does the power supply look like with and without your fingers? You may need to play around to get a useful trace.Were your fingers touching any other terminals in addition to the power supply?Does anything else change (e.g. frequency, duty cycle etc)?What capacitance and resistance are you using to set the frequency?And it would help to see a schematic. Maybe you have a ring oscillator, not an astable multivibrator.

author: Seekonk
author_rank: Super Contributor
timestamp: October 04, 2014, 05:29:43 pm
content: First gut reaction is that you are adding shielding or at least better grounding. Breadboards can be sensitive to noise. Try surrounding circuit with aluminum foil that is connected to power common as a test.

author: MrRadiotron
author_rank: Contributor
timestamp: October 12, 2014, 06:07:07 am
content: Hi guys,Thanks for your suggestions guys!, turned out to be a dodgy trim pot....Quote from: tggzzz on October 04, 2014, 04:21:40 pmI'd like to get my terminology correct.I this an astable multivibrator?circuit atached

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 12, 2014, 06:17:10 am
content: Probably you're shielding the local area, or adding common mode capacitance to the circuit, or introducing external noise that's causing phase lock (and thus reducing jitter), etc.Tim
hand-build LFCSP? - Page 1
Forum section: electronics / beginners

author: awallin
author_rank: Frequent Contributor
timestamp: October 18, 2014, 12:45:24 pm
content: Hi all,we've prototyped a design using ready made evaluation-boards where the main chip is in a 64-lead LFCSP package with an exposed pad in the middle.If we make our own PCB for this, how hard/easy will it be to solder the LFCSP chip using e.g. solderpaste, laser-cut metal stencil, and a reflow oven? Any particular gotcha's or things to watch out for?thanks!AW

author: Precipice
author_rank: Frequent Contributor
timestamp: October 18, 2014, 12:55:55 pm
content: That should be tricky but OK if you're careful.Definitely extend the pads outwards, so you can see the solder flow and rework with an iron if you need.Don't paste much on the belly pad. 50% coverage works OK for prototypes, where I need to encourage the package to sit low, to make it easiest for the pins to solder. 70% for production, for a tuned process, leaves less void space, but I really doubt you care about sucking the heat out of that package!Be brutal when checking your solderpaste before assembly - wipe it off, clean, and do again, if you're at all concerned. It's generally a lot quicker to do this a couple of times than chase bugs and rework.In production, these things are bread and butter. In prototyping, they just need you to pay full attention. Dodgy placement and dodgy solderpaste don't help, these things don't have the self centering of an 0603 or SO-8. They're less annoying than MSOP-10, though, which appears to be my nemesis at the moment.
Hand held Oscilloscope - Page 1
Forum section: electronics / beginners

author: rad400
author_rank: Contributor
timestamp: April 10, 2022, 02:29:37 pm
content: I have a Rigol 1054 bench scope but looking for a portable oscilloscope to take low voltage (0 to 20VPP) signal readings for a model RR command control system. Scopes under consideration are; Owon HDS242, Mustool MSD8207. & Mustool MDS120M which are all in the $90-$130 range. Any suggestion of what would be a good portable scope to purchase or ones to avoid?ThanksRAD400

author: Markus2801A
author_rank: Regular Contributor
timestamp: April 10, 2022, 03:54:27 pm
content: There is a thread about the OWON HDS 200 Series Scopes here:https://www.eevblog.com/forum/testgear/owon-hds-200-handheld-oscilloscope-w-builtin-dmmawg/

author: tunk
author_rank: Super Contributor
timestamp: April 10, 2022, 04:02:56 pm
content: The Owon has two channels and comes from a known manufacturer with a home page.The two others are one channel, comes from a no-name "manufacturer" and the specsare a bit "inflated". You could also look at the Hantek handhelds.

author: cdev
author_rank: Super Contributor
timestamp: April 10, 2022, 04:54:25 pm
content: If you are looking for a battery powered scope to allow you to take floating measurements, that's different than what you get with an AC-powered unit. Its a difference that may be important too.

author: David Hess
author_rank: Super Contributor
timestamp: April 10, 2022, 05:09:18 pm
content: Considering how portable your Rigol 1054 is, like most modern oscilloscopes, I think it would be a waste of money to buy something more portable because of the lack of performance compared to your Rigol 1054. If you need floating or differential measurements, then buy a high voltage differential probe instead to use with your Rigol 1054.

author: rad400
author_rank: Contributor
timestamp: April 10, 2022, 05:11:48 pm
content: I understand the basic information of these scopes but was looking to see if anyone has tried any of these and what their experience was. My current application is to measure FSK type signals in locations where it's hard to bring a bench top scope to.

author: BILLPOD
author_rank: Frequent Contributor
timestamp: April 11, 2022, 06:31:26 pm
content: Good Morning David, I got an Owon HDS272, (without the AWG), and I've got it hooked to my UTG962 and my Siglent SDS1202X-E comparing the 2 scopes, and they both give identical good results. I got the Owon instead of getting a differential probe for my Siglent, so I could connect to mains voltages in my testing. As a bonus I now have a nice extra DMM.

author: tepalia02
author_rank: Regular Contributor
timestamp: April 13, 2022, 03:10:26 pm
content: DSO Nano V3 Mini Oscilloscope is good also.
Hand soldering a ceramic LCC package - short 3 minute video - Page 1
Forum section: electronics / beginners

author: w2aew
author_rank: Super Contributor
timestamp: May 27, 2014, 01:43:24 pm
content: Just a short 3 minute video showing how I hand-solder a ceramic leadless chip carrier package (LCC), with castellated terminations:

author: nanofrog
author_rank: Super Contributor
timestamp: May 27, 2014, 10:13:49 pm
content: Nice soldering demo.A close-up of the finished solder job would be really nice if possible IMHO (time and camera wise). Proverbial "icing on the cake" if you will.
Hand-soldering surface-mount PLCC sockets - Page 1
Forum section: electronics / beginners

author: Peacefrog
author_rank: Contributor
timestamp: August 24, 2023, 04:11:21 pm
content: I've recently found myself wanting to solder surface-mount PLCC sockets down by hand, and want/need to improve my technique.The 'obvious' way to do it is to push out the center part and solder the remainder, but this weakens the socket (also - I can never satisfactorily push it back in place). Instead, I've found myself keeping everything intact and soldering the pins using a very fine-tipped soldering iron and lots of flux - and while this works fine, I inevitably end up burning the plastic in a few places as it's very cramped and I'm apparently not so dextrous.Is there a better technique for this? I've thought of applying low melt solder paste and using hot air, but I'm not sure if this will scorch the socket? Thanks!

author: djsb
author_rank: Super Contributor
timestamp: August 24, 2023, 04:48:52 pm
content: Is this helpful?He has at least one other similar video.

author: Gyro
author_rank: Super Contributor
timestamp: August 24, 2023, 05:46:39 pm
content: Yes, it's a pain in the ass hand soldering PLCC sockets without removing the plastic 'spider'. I've did it myself plenty of times in the past. Removing the spider puts all of the spreading forces from the contacts onto the surface mount pads.The only easy answer is hot air and solder paste. Yes, you do need to carefully control the air temperature but it is doable - after all, people manage to get them through IR reflow.

author: LinuxHata
author_rank: Frequent Contributor
timestamp: August 25, 2023, 04:54:59 am
content: I'm heating PCB from below, up to 230C and using 186C solder from Kellyshun - I just apply the paste, place the socket, an place PCB over a heated bed. Wait couple of minutes - here you are.

author: TheEPROM9
author_rank: Frequent Contributor
timestamp: November 24, 2024, 05:47:59 pm
content: This helped me massively, thank you. Was able to solder a PLCC socket in a bus display controller after dumping the content of the chip. I place the plastic base back in & just poped the chip ion top of it. Used plenty of flux & all was good.
Handheld DSO Channel Isolation Question - Page 1
Forum section: electronics / beginners

author: mainman
author_rank: Regular Contributor
timestamp: August 03, 2017, 04:32:31 am
content: Quick question guys.I have a handheld battery powered DSO that does not have isolated Channels. What I want to do is monitor both the AC RMS volt and AC RMS current of a appliance plugged into a 120V outlet at the same time using both channels. One Channel will be used for AC volt and the other will be equipped with a traducer AC Clamp to monitor current. What I would like to know is will this create magic smoke because of different potentials.

author: tautech
author_rank: Super Contributor
timestamp: August 03, 2017, 05:52:33 am
content: If the AC current clamp offers enough isolation rating and has no connection to the AC mains you'll be OK.Be sure to use the voltage probe on 10X setting or better still get a 100X probe for further safety.

author: mainman
author_rank: Regular Contributor
timestamp: August 04, 2017, 04:06:10 am
content: Thanks for the help dude.On a related note are you familiar with the fluke 43B and fluke 125B

author: tautech
author_rank: Super Contributor
timestamp: August 04, 2017, 04:15:52 am
content: Quote from: mainman on August 04, 2017, 04:06:10 amNo.Only SHS810 ...............remember.

author: mainman
author_rank: Regular Contributor
timestamp: August 04, 2017, 05:22:57 am
content: Quote from: tautech on August 04, 2017, 04:15:52 amLOL very good memory.I still have the SHS810 btw. Scope is good multimeter is still crap. Planning on buying some of those Micsig differential probes for it soon.I been upgrading my gear again lately and am buying fluke brand now. Needed Averaging/Power and Harmonics Measurements capability so i pick up a fluke 289 and 43B recently. I been watching youtube reviews and was wondering how much of the 43B function are incorporated into the 125B
Hands away from Aliexpress - Page 1
Forum section: electronics / beginners

author: Unknown
author_rank: Unknown
timestamp: April 23, 2014, 03:34:26 pm
content: POST REMOVED AT USERS REQUEST

author: abaxas
author_rank: Regular Contributor
timestamp: April 23, 2014, 03:50:25 pm
content: You end up paying more if buying from ebay, as the cost of this is factored in.I've bought loads of things from aliexpress. So far everything has exceeded my expectations, mainly becasue I set them so low.

author: abaxas
author_rank: Regular Contributor
timestamp: April 23, 2014, 03:58:59 pm
content: le zhonChina (Mainland)No feedback score

author: abaxas
author_rank: Regular Contributor
timestamp: April 23, 2014, 04:05:32 pm
content: We've all done it before. Been sucked in by the cheapest.

author: wraper
author_rank: Unknown
timestamp: April 23, 2014, 04:17:52 pm
content: Quote from: pereczes on April 23, 2014, 03:34:26 pmThey won't vanish because they don't get your money until you confirm order received or protection period ends. Aliexpress holds money until then. Be careful to not miss that period. But frankly, you should have read the processing time. Did you request order cancellation? there was button somewhere. You also wrote that you contacted the support but nothing about contacting the seller.

author: Bored@Work
author_rank: Super Contributor
timestamp: April 23, 2014, 06:34:12 pm
content: Quote from: pereczes on April 23, 2014, 03:56:18 pmHmm, how should I express this? Ok,what about this: Always look on the bright side of life. You will be grateful for every day you don't have to use an ATTEN product

author: 8086
author_rank: Super Contributor
timestamp: April 23, 2014, 07:42:00 pm
content: This is the same price. I have one and it's pretty good. Don't know where you are but maybe an option if you can cancel your order.http://uk.farnell.com/tenma/72-10480/power-supply-1ch-30v-3a-adjustable/dp/2251946

author: TheAmmoniacal
author_rank: Unknown
timestamp: April 24, 2014, 09:46:35 am
content: It's possible that they build the units to order, it wouldn't surprise me. For what you are looking for I would personally recommend this one:http://www.aliexpress.com/item/32V-5A-Small-Volume-adjustable-DC-Power-Supply/1454769964.htmlAliexpress do have good support, you just have to know the details of your order first.

author: Bored@Work
author_rank: Super Contributor
timestamp: April 27, 2014, 06:33:58 am
content: Quote from: pereczes on April 27, 2014, 02:08:54 amWhy do you ask for opinions AFTER you bought that thing? Don't you think it would be a bit more clever to first ask, then buy?
Handskit T12 - help repairing - Page 1
Forum section: electronics / beginners

author: Vinniethapower
author_rank: Newbie
timestamp: August 19, 2024, 10:09:35 pm
content: Hi everyone. I had a mini soldering station from Handskit for about a year, and recently I bought a 3d printer and decided to print an enclosure for the station to be able to use with 20v batteries. I had to desolder the connector in order to be able to remove it from the original enclosure. So far, so good. While I had it out of the original enclosure I noticed that it has an led that works while the tip is heating and I tried to add another led just to leave it out in the new enclosure but while trying to solder it I damaged the on-board led and gave up... After this happened now I only get error message and a cold tip, although in debug mode I can heat the tip manually, there seems to be a problem only with the sensing... Can anyone help or guide me on what to look for?

author: MathWizard
author_rank: Super Contributor
timestamp: August 20, 2024, 05:32:30 am
content: Some of those solder joints and traces look pretty dirty, some current could have gone somewhere it shouldn't and something got fried (if it was powered up like that). So I'd give it a good cleaning and finish with alcohol. And check it over with a DMM 1st before powering it up. When soldering SMD parts, I know I leave the iron on the parts too long, and just trying to align stuff, and not have the part stick to the iron, can be hard.Well some of it is still working, but I'd be tempted to remove some of the caps, so I could easily check most caps and resistors when unpowered.IDK about the circuits in them though, but here's a thread for another T12 iron, with some schematics a little ways down page 1.https://www.eevblog.com/forum/reviews/t12-stm32-v2-1s-soldering-station-controller-schematic-etc/
Handy PCB Design Tool !  - Page 1
Forum section: electronics / beginners

author: Jwillis
author_rank: Super Contributor
timestamp: November 10, 2021, 01:00:22 am
content: Just found this and found it really handy for calculating traces instead of searching a dozen different web sites . Lots of features all in one package.https://saturnpcb.com/?s=pcb%20toolkit
Hanheld frequency analyzer question - Page 1
Forum section: electronics / beginners

author: bdidds0831
author_rank: Contributor
timestamp: July 18, 2022, 02:24:53 am
content: Hi, I'm new when it comes to measuring frequencies with my handheld analyzer. I'm trying to detect all the frequencies around me. I'm wondering how I can isolate a certain frequency that's coming from inside of me. Long story, but I digested something that emits a frequency and I'm wondering how to detect it and prove that I'm actually emitting frequency.Do I need to stand out in a field to minimize interference as to isolate this frequency within my body? I just want to use my spectrum analyzer to isolate this frequency.Please let me know if you have any ideas or suggestions.
HANMATEK DOS1104  oscilloscope - Page 1
Forum section: electronics / beginners

author: motoge
author_rank: Contributor
timestamp: July 09, 2024, 11:54:47 pm
content: Hello, I am a beginner to using oscilloscopes. Sorry for posting in incorrect English. I am using Google translation.To the pointI am thinking of purchasing a HANMATEK DOS1104 4ch oscilloscope.To measure three-phase AC generators, injector operation, ignition timing, etc. for motorcycle maintenance.I am already using a 1ch oscilloscope, KKmoon DS0120M.Do you have any recommendations for a low-cost 4ch oscilloscope?ps I place importance on measuring three-phase AC generators。thank you From JAPANこんにちはオシロスコープを使用するのは初心者です。間違った英語で投稿するのはごめんなさい。グーグルの翻訳を使用しています本題ですHANMATEK DOS1104の４ch のオシロスコープを購入しようとしています。オートバイの整備のため 三相交流発電機、インジェクタ―動作、点火時期等測定するためです。すでに1CHオシロ KKmoon DS0120Mは使っています低価格の４Chオシロのおすすめは有りますか?ps 三相交流発電機の測定は重視しています

author: jonpaul
author_rank: Super Contributor
timestamp: July 12, 2024, 06:54:50 am
content: No need to proble a 3 phse gen, the alternators rectify to DC and use a solid state battery regulator.Beware that didital scopes on vehicle ignotion are bound to fail due to HV pulses to 30 kV an dCM noise.Use a simple xenon timing light or Get a professional ignition Analyzer.Jon

author: motoge
author_rank: Contributor
timestamp: July 17, 2024, 02:46:10 am
content: Thank you for your replyI would like to measure the condition of the generator coil of a three-phase AC generator and its waveform.返答ありがとうございます三相交流発電機のジェネレーターコイルの良否と波形を測定したいのです。

author: motoge
author_rank: Contributor
timestamp: July 17, 2024, 02:55:55 am
content: I want to use an oscilloscope to display whether the generator coil is burned or not.

author: motoge
author_rank: Contributor
timestamp: July 18, 2024, 11:06:53 pm
content: Merci pour votre conseilQu’est-ce que le bruit DCM ?Merci beaucoup pour votre conseilmerci

author: rich t
author_rank: Contributor
timestamp: July 18, 2024, 11:55:31 pm
content: I also use a scope on motorcycles...You can see some of my experiences using a $18 scope I built here:https://www.zx6r.com/threads/running-with-the-tank-off-ignition-injector-adventure.120654/?post_id=1915926#post-1915926You can see injector pulses, stick coil pulses, and even the crankshaft sensor.The scope goes to +/- 60 volts when using a x10 probe, which is plenty for automotive use, I believe, plenty for the 3-phase windings, etc.

author: motoge
author_rank: Contributor
timestamp: July 19, 2024, 04:11:43 am
content: Thank you for very useful informationAnd the 1CH oscilloscope unit looks very interesting.I'll introduce it on the Japanese website too.It's in Japanese but it's my website.https://ameblo.jp/motogecg125fiSometimes I try to install a 1-channel oscilloscope in my car.thank you for everything
HANNA checktemp 1 repair - Page 1
Forum section: electronics / beginners

author: rodrigopires
author_rank: Regular Contributor
timestamp: February 16, 2018, 06:22:00 pm
content: Hello everyone! A friend of mine gave me a HANNA checktemp 1 instrument but it came witout the probe (it was cut). Without beeing able to find any information online regarding the type of ntc I did some mesurement and ploted the results. I came to the conclusion that the machine uses a 41KOhm (25ºC) NTC. Looked online but this value does not seem common. What are my options?In the attachements are the graph of the mesuremnts and a datasheat from where I compaired my results.DATA:Temp. (ºC) Kohm149,9 1,27142,3 1,5134,9 1,8125,6 2,268,1 1054,1 1545,3 2042,9 2225,0 4120,0 5012,0 682,5 1000,0 112-13,2 200-22,0 300-27,8 400-44,8 1000Thanks!
Hantek 2000 s/w missing Visa32.dll anybody faced this issue. ? - Page 1
Forum section: electronics / beginners

author: chinoy
author_rank: Regular Contributor
timestamp: April 22, 2022, 02:42:40 pm
content: Got a Hantek2000 to play with for a few days.Loaded the s/w from the hantek site.When I try to run it I get an error message saying. Visa32.dll missing.Anybody else run into this issue ?.Yes I used google and google wants me to load NI-Package manager.Is this normal. ?.Downloaded the latest software from their web site. For the DSO2000 series.Ans: Open the help file.The help file sends you to a link and asks you to download a software. It didn't work even after I did that. Though.Returned the scope and uninstalled the s/w.
Hantek 4202C AWG vs Rigol 1022 AWG - Page 1
Forum section: electronics / beginners

author: Deboscope
author_rank: Contributor
timestamp: November 11, 2019, 07:02:29 pm
content: Hi Friends, I have ordered me a new Hantek 4202C and I aleady own the Rigol 1022 AWG but it is in another country.How does the bulit in Hantek AWG compare to a dedicated stand alone AWG such as the Rigol 1022?
Hantek 6022 be how to use it - Page 1
Forum section: electronics / beginners

author: antonio.giosuele@live.it
author_rank: Newbie
timestamp: February 06, 2018, 03:17:23 pm
content: Hi everyone!I'm totally new in this field but i want to get started as soon as possible with this new present of mine.I already calibrated the sensors but i'm quite unsure how to make it work without any damage for my pc.I mean, what should i have to do to measure secondary ignition systems for example without damage anything?Thanks a lotAntonio

author: danadak
author_rank: Super Contributor
timestamp: February 06, 2018, 04:50:24 pm
content: If you have to measure HV directly than a probe for that purposealmost mandatory.If all you are trying to see is waveshape, then you can make a sniffer loopthat magnetically extracts waveform from its field source.If you are new a good practice is buid a zener protection circuit for your scopeuntil you feel comfortable.https://www.tek.com/blog/protecting-against-instrument-overloadSome ref material -http://web.mit.edu/6.101/www/reference/ABCprobes_s.pdfhttp://download.tek.com/document/51W_10640_1.pdfhttp://download.tek.com/document/40W_11342_0.pdfhttp://www.techni-tool.com/site/ARTICLE_LIBRARY/Tektronix%20-%20IsolatedInputOscopes.pdfhttp://www.newark.com/pdfs/techarticles/tektronix/FFM.pdfhttps://www.eevblog.com/forum/testgear/floating-oscilloscope/Look at Daves videoRegards, Dana.

author: Seekonk
author_rank: Super Contributor
timestamp: February 06, 2018, 05:20:13 pm
content: I've been using scopes forever and I like this one for portable use at camp. One thing I don't like is that it is pretty easy to overload the A/D. Rule of thumb, anytime you see a flat top to the waveform without noise it has clipped. Wish they would reserve RED for that and change the color of that section of the trace to indicate it. I'd say a X100 probe with this scope is almost mandatory. The X1 X10 switch is just to easy to have in the wrong position.

author: antonio.giosuele@live.it
author_rank: Newbie
timestamp: February 07, 2018, 12:21:17 pm
content: You guys are awesome! Thank you!Do you think i'm going to be able to perform any kind of test with this device?My father runs a body repair shop and I would like to expand our activity to electronics, hence my little knowledge
Hantek 6022 -- DV Voltage - Page 1
Forum section: electronics / beginners

author: scope
author_rank: Newbie
timestamp: June 13, 2014, 09:00:57 pm
content: Hello, Can the Hantek be used to measure DC voltage that is higher than 5 volts? When I tried to measure the volts from a somewhat 9 volt DC battery on my multimeter, I got 8.1. But on the Hantek I got either much higher numbers like 24 volts.Thank you,

author: Rick Law
author_rank: Super Contributor
timestamp: June 13, 2014, 09:38:19 pm
content: Quote from: scope on June 13, 2014, 09:00:57 pmYeah, you can use the Hantek for voltage measurement. Like other scopes, they are not as accurate a volt meter as DMMs.If you get wild numbers, check your connection.
Hantek dso 3064 - Page 1
Forum section: electronics / beginners

author: gudgeon
author_rank: Newbie
timestamp: December 13, 2015, 10:06:45 am
content: Hi guys,I'm new to this forum and oscilliscopes in general,I work in the automotive industry and have recently purchased a hantek dso 3064 model,after installing software and drivers on my pc I set up the one channel to measure a 9v battery just to try and get used to how it works etc,I set the voltage scale to 5v/div and the timebase to 1s/div but as I touch the probes to the battery terminals there is a delay of approximately 3/4 seconds before it registers on the scope,As I said at the start I'm a novice with scopes so I'm not sure wether it's me or the scope that's wrong,any help would be much appreciated thank you.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: December 13, 2015, 02:07:57 pm
content: This is normal for such a slow timebase setting, and the delay will likely depend on where the scope is along a sweep when you make the connection.Try this. Insure that the Sweep (Trigger) Mode is "Auto", not "normal" or "single shot". Clip the probe's ground reference to the negative battery terminal. Then tap the probe to the positive terminal over and over. See how long it takes for the tapping to show up on the sweep at different timebase settings: 1 sec/div, 100 ms/div, 10 ms/div, and so on.

author: gudgeon
author_rank: Newbie
timestamp: December 13, 2015, 02:47:19 pm
content: Thanks for taking the time to reply to my question,I will try what you said and let you know the outcome.....thanks again
Hantek DSO 4202C has arrived - Page 1
Forum section: electronics / beginners

author: Deboscope
author_rank: Contributor
timestamp: November 30, 2019, 09:48:06 am
content: I just got it half an hour ago.Still haven't opened the box yet.Can't open it at work though...

author: Deboscope
author_rank: Contributor
timestamp: November 30, 2019, 07:23:04 pm
content: Some photos of the 4202
Hantek DSO1202B firmware - Page 1
Forum section: electronics / beginners

author: maxricho
author_rank: Newbie
timestamp: June 26, 2013, 02:47:08 pm
content: Hi, I have an oscilloscope HANTEK DSO1202B, I updated the firmware and after I update the menu only language in China, can anyone advise me what to do?

author: maxricho
author_rank: Newbie
timestamp: July 01, 2013, 01:52:52 pm
content: No advice?

author: MasterOfNone
author_rank: Regular Contributor
timestamp: July 01, 2013, 09:58:30 pm
content: I don’t own and have never used a Hantek DSO120B, but this is my best guess, based on the fact that when you updated the firmware, the language could have just reset to Chinese (I.e. default) and you just need to change it back to English.Download the English user manual and locate the section that describes how to change the language in the manual.Follow the English instructions for changing the language, even though you do not understand the Chinese characters displayed on the Scope.This should be possible because the layout and position of the menus (i.e. soft buttons etc) probably wouldn't have changed, just the words/symbols displayed.So press the correct Button to bring up the Menu that accesses Language (usually Utility). Press the buttons to get to the correct Page/Option by looking at the number of button presses required in the manual. When you think you have located the correct option for Language. Change the option to a different value because even if you don’t get English it’s likely that you’ll be able to spot the correct option when the language changes from Chinese. So if the language changes but it isn’t English try again, but if the Language doesn’t change and you are sure you have followed the steps correctly then contact Hantek Technical support.