Everything you need to know when buying/using an Oscilloscope! EB#49

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GreatScott!

GreatScott!

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You can get a decent (4 channel, low cost) scope here (affiliate links):
amzn.to/3k0yOAn
s.click.aliexpress.com/e/_Aqd2VG
You can get a differential probe here (affiliate links):
amzn.to/3AQdFzq
s.click.aliexpress.com/e/_9IoEt4
Websites which were shown in the video:
www.batronix.com/shop/oscillo...
www.batronix.com/shop/oscillo...
www.batronix.com/shop/oscillo...
www.batronix.com/shop/oscillo...
In this electronics basics episode we will be having a look at the biggest mistake you can do when working with an oscilloscope. But I will not only show you how to do safe mains voltage measurements but also show you all the basics when it comes to oscilloscopes. That means I will show you how to choose one, how to do simple voltage and current measurements and finally how FFT works. I will explain passive probes, triggering, voltage & time division, measuring functions, the cursor function, AC & DC coupling and single mode capturing. Let's get started!
Thanks to Brilliant.org for sponsoring this video.
Music:
2011 Lookalike by Bartlebeats
0:00 The big mistake when using an oscilloscope
1:08 Intro
2:02 How to choose a scope?
4:44 Passive probes & scaling factor
5:55 Trigger
6:41 Voltage division
7:11 Time division
7:37 Measure function
7:47 Cursor function
8:19 AC & DC coupling
9:08 Single mode capturing
9:36 Current measurement
10:16 Safe mains voltage measurement
11:37 Differential probe
11:52 Math & FFT

КОМЕНТАРІ: 661
@greatscottlab
@greatscottlab 2 роки тому
Here are some things I would like to add to the video: 1. I do not want to shame low cost scopes in this video. I started with a 2 channel one from Rigol and it worked perfectly fine. Over the years though I noticed that 4 channel scopes are the way to go. And I also only got such expensive Keysight scopes since they gave them to me for free in order to support my work. So in a nutshell, you can start with a low cost scope just fine! 2. I heard that people would just insulate the PE connector when powering the scope in order to measure mains AC voltage. This is a TERRIBLE idea. This way you connect a possibly very high voltage to the BNC connectors. If you touch that, you have a problem because you can be partly or completely connected to PE. Only use a differential probe for that or use two scope channels and use the math function in order to calculate the difference between them. Thanks for reading ;-)
@username8459
@username8459 2 роки тому
The second addition definately sounds like Electroboom :D Though he uses a differential probe in some of his videos.
@xistencestudios8904
@xistencestudios8904 2 роки тому
I recommend something like an Owon VDS1022 for the bare minimum oscilloscope, a Hantek DSO2xxx series for the cheapest standalone scope with a function gen
@VijayaLakshmi19807
@VijayaLakshmi19807 2 роки тому
Hi sir. Sir please hack an AR glasses to work on a HDMI input even if the whole setup becomes bulkey. Bigg fan. Love from India ❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️❤️
@rsattahip
@rsattahip 2 роки тому
Thanks, what about an isolation transformer to keep your scope and circuit safe?
@marekaksmu
@marekaksmu 2 роки тому
What about using a separating transformator for powering osciloscope? I hope I translated it fine :) it can be usefull aswell ?
@yeyee2418
@yeyee2418 2 роки тому
I was pretty sure something was gonna blow up on the intro, but quickly realize this is not electroBOOM. Great video as always sir!
@greatscottlab
@greatscottlab 2 роки тому
Something did blow up while filming......but the camera was not rolling....too bad
@joshm264
@joshm264 2 роки тому
Same, i was expecting "let's hook it up... SH****"
@MohitSharmaxp
@MohitSharmaxp 2 роки тому
@@greatscottlab 4:55 you did blow something I guess
@eswing2153
@eswing2153 2 роки тому
“Definitely not going to talk about why I only have three probes and unmatching tips.”
@alejandroalzatesanchez
@alejandroalzatesanchez 2 роки тому
*FULL BRIDGE RECTIFIER!!*
@Kevin-jz9bg
@Kevin-jz9bg 2 роки тому
Greatscott: Let's hook it up and.... thank god, nothing blows up. Electroboom: Let's plug it in and... Wow, nothing blew up, that's surprising. Oh wait, I forgot the turn on the power strip. (flicks switch) BANG
@bunny1033
@bunny1033 2 роки тому
I was going tell that too
@YTshashmeera
@YTshashmeera 2 роки тому
I remember that video lol
@Antagon666
@Antagon666 Місяць тому
You don't mess with 230V. 120V is at least relatively safe.
@TechGorilla1987
@TechGorilla1987 2 роки тому
I love the fact that your hand computer (aka writing instrument) is permanently set to bold text. Your ability to accurately trace over your writing with your markers is legendary.
@takatamiyagawa5688
@takatamiyagawa5688 2 роки тому
He needs a thicker pen.
@breezetixhv
@breezetixhv 8 місяців тому
years of doing that
@Darkshadow799
@Darkshadow799 2 роки тому
I learned more in this 12 minutes than in 8 hours of my electric measurements course. Good job
@greatscottlab
@greatscottlab 2 роки тому
Thanks mate :-)
@tvishmaychoudhary69
@tvishmaychoudhary69 2 роки тому
Mehdi from electroboom didnt explained that much Happy that you did it 😀
@greatscottlab
@greatscottlab 2 роки тому
Yep, it is an important subject. I am glad I can finally cross it off my to do list :-)
@shkhamd
@shkhamd 2 роки тому
EEVblog has a video that goes into even more detail
@huseynmashadiyev5435
@huseynmashadiyev5435 2 роки тому
I have fast reaction to pause the video, when someone says: "Let's hook it up", I guess ElectroBoom's mental traces are visible :D
@Kevin-jz9bg
@Kevin-jz9bg 2 роки тому
LOLL I thought the same thing
@kenmore01
@kenmore01 2 роки тому
As a long time SMPS engineer, I can tell you, NEVER isolate the scope or defeat the PE ground on it! You can isolate the power supply (device under test or D.U.T.) with a 1:1 isolation power transformer, or my old fave for use when I don't have access to one is to use two scope channels. Connect just the probe tips (unclip your ground wires from the probes so they don't touch anything by accident), and use "invert and add." That works well for low to moderate frequencies. If you must measure higher frequencies, connect both grounding clips to an "X" capacitor (rated for across the line) of around 0.1uF or so and connect the other end of that cap to the D.U.T. electrical power supply ground, though that is the least preferred method. The most preferred is the power isolation transformer to isolate the supply. It makes it safer in case you touch it too.
@oliverm1255
@oliverm1255 Рік тому
what's wrong with isolating the scope ground
@kenmore01
@kenmore01 Рік тому
@@oliverm1255 It creates an entire oscilloscope's worth of dangerous high voltage you you or anyone to touch.
@MrOlezhandr
@MrOlezhandr Рік тому
I specifically bought a battery-powered oscilloscope, as I burned more than one microcircuit until I figured out that the matter was in the earth connections. But now I ordered an isolation transformer)
@kenmore01
@kenmore01 Рік тому
@@MrOlezhandr Awesome! The life you save may be your own, or your kid's.
@joeshmoe7899
@joeshmoe7899 Рік тому
Why not just use a gfci, instead of an isolation transformer?
@brianmendell1449
@brianmendell1449 Рік тому
Hey Scott I've been watching your videos for a couple of months. Man I just have to say thanks man for helping me learn a new trade after I was hit with a stray bullet 7 years ago. Learning how to chase down my electronic demons lol has now through your videos helped me help other people in my area with their mobility scooters or wheel chairs. So thanks and keep up the great content and I'll keep watching.. 👨‍🦼
@varunrmallya5369
@varunrmallya5369 2 роки тому
Sir, could you make a series teaching us about the features of an oscilloscope and wave forms observed in electronics. Would be really helpful
@Meowface.
@Meowface. Рік тому
This is one of those tools I’ll buy first and find a use for later
@jimvonmoon
@jimvonmoon 2 роки тому
After watching this video I am more afraid to try out my oscilloscope than I was before. It just made me realize how little I know about electronics. Now I need to find a more in-depth and more beginner-friendly tutorial.
@montecri
@montecri 2 роки тому
Please don't be. If you're into building IoT stuff (Arduino, stm32, etc) you're mostly safe; just be aware when powering your boards through a computer USB port since some of them will connect USB gnd to mains ground. I almost always use a power bank for that. Physical isolation is good.
@mernok2001
@mernok2001 2 роки тому
@@montecri USB connected to mains ground is not a problem.Its only a problem when you measure a full bridge rectifier with your scope probe.
@adisharr
@adisharr Рік тому
I appreciate your multi-color sketches as you present the topic. Always very well done! Very easy to listen to and educational :)
@jackwilliams2010
@jackwilliams2010 2 роки тому
Great tips! When I took an electronics course the instructors wouldn't let us touch the oscilloscopes until our second year. And then there were several reminders not to touch the leads to any of the board's powered by the mains unless you were on the other side of a transformer.
@nirbhay.8400k
@nirbhay.8400k Рік тому
THE best video for beginners! You are a life saver dude! Perfect and clear explanations.
@Archnemesis88
@Archnemesis88 2 роки тому
Great video, I recently picked up a 2 channel scope as an upgrade over my DIY oscilloscope kit, can't wait till I can upgrade to something much fancier! You dropped some great tips in this video 👍
@nikolaiorr8383
@nikolaiorr8383 2 роки тому
Thanks for the explanation, I've wanted to get a scope for some years now but haven't due to costs and not knowing how to use one. This video also explains them in a simpler way than others have done.
@DoDo-is7yb
@DoDo-is7yb Рік тому
Great video! For the basics I would add to adj. the cap in the probe for a correct square wave.
@Music_Engineering
@Music_Engineering 2 роки тому
This is such a great video! I am a TA and will definitely recommend this video to new students 😊
@peerappel2012
@peerappel2012 2 роки тому
The input and output of differential probes are actually usually not isolated, it's just a resistive voltage divider (the 4.5Meg measured in the video) that reduces the voltage on the input that enables measurement of high (common mode) voltages.
@TotalWarChronicles
@TotalWarChronicles 2 роки тому
Really good video Scott! It is nice a nice change to have a video that is less complicated!
@MorsAdvancedTech
@MorsAdvancedTech 2 роки тому
Scott: no don't do that it may cause a lot of damage Electroboom: here's how to make a 500000000000v wand and kill all electronics around the house
@Kevin-jz9bg
@Kevin-jz9bg 2 роки тому
HAHAHA
@getcartercarpark.
@getcartercarpark. Рік тому
I love the exclamation at the beginning of the video when you plug the homemade switch mode PSU into the mains AC!!!!!
@gokhanince3059
@gokhanince3059 2 роки тому
11:37 When I was in the university, We solved this problem with a bit of electrical tape to mask the PE of the oscilloscope. But this method can be painful. Please don't try at home. But instead of the tape method, I think an isolation transformer can work fine.
@boulder795
@boulder795 2 роки тому
DO NOT connect an oscilloscope to an isolation transformer. Always isolate the circuit you are working on, or if that is not possible use differential probes. Never isolate your test gear
@Ryan_Tidwell
@Ryan_Tidwell 2 роки тому
@@boulder795 Why? as long as there are no ground loops you should be fine.
@eDoc2020
@eDoc2020 2 роки тому
@@Ryan_Tidwell Rule of thumb: only connect an oscilloscope ground someplace you would feel safe putting your finger. The device under test needs to be isolated. Whatever you connect the ground clip to becomes connected to the oscilloscope chassis. If you isolate the oscilloscope and connect the clip to a mains reference the electronics will be happy, but if you touch the scope then you could get shocked. Plugging an oscilloscope into an isolation transformer is actually safe. However it's pointless because an oscilloscope's power supply is already isolated. More importantly, and to Stephen's point, this can provide a false sense of security. It's the equivalent of touching bare high voltage power wires while "protecting" yourself by wearing rubber shoes.
@AttilaAsztalos
@AttilaAsztalos 2 роки тому
Isolating your scope through a transformer works just fine. Nothing wrong with it as long as you keep in mind that poking another mains-connected thing with it will make everything else hooked up to the scope and any metal on the scope itself also mains-connected. If that's too much for you, you have no business poking mains-connected gear, no matter which part you isolate, full stop.
@eDoc2020
@eDoc2020 2 роки тому
@@AttilaAsztalos Plugging a scope into an isolation transformer doesn't accomplish anything because an oscilloscope's power supply is already isolated. If you really want to isolate its ground, just tape over the ground/earth pin in the power cord. I'll discourage this because of the risks involved, but if you decide to do this please be sure to use a _tested_ GFCI/RCD in case something goes wrong.
@Salfke
@Salfke 2 роки тому
Great video, you teach simple steps of using a scope in 12 minutes better then all the other videos I have seen. nice and easy.
@greatscottlab
@greatscottlab 2 роки тому
Glad you liked it!
@xConundrumx
@xConundrumx 2 роки тому
2 more options... 1. Use a separation transformer to power the device under test. 2. Use a handheld (or battery powered scope)
@stevetobias4890
@stevetobias4890 2 роки тому
Great video Scott, I am still learning my way around my beginner Siglent SDS 1102DL+ scope. It has come in handy a couple of times but I need to learn more.
@iMakeFunnier
@iMakeFunnier 2 роки тому
Been waiting for a video like this for a long time. Thank you very much. This is very informative for those of us without electronics backgrounds.
@greatscottlab
@greatscottlab 2 роки тому
Glad it was helpful!
@Abodino
@Abodino 2 роки тому
I was thinking about buying an oscilloscope and finally got a great video about oscilloscopes... THANKS!!!
@mvv175
@mvv175 2 роки тому
Thank you for making this type of videos they are so informative
@greatscottlab
@greatscottlab 2 роки тому
Glad you like them!
@amnesie6615
@amnesie6615 2 роки тому
I love this basic / beginner videos! Danke!
@greatscottlab
@greatscottlab 2 роки тому
Glad you like them!
@mattwillis3219
@mattwillis3219 2 роки тому
Essential viewing for anyone venturing into the domain of power electronics, quality education as always GreatScott!
@greatscottlab
@greatscottlab 2 роки тому
Thanks mate :-)
@Mladjasmilic
@Mladjasmilic 2 роки тому
I had electrical measurement classes at Faculty of electrical engineering. We worked with old analog scopes (2012). Our professor taught us that is we measure mains voltage or autotransformer that we can simply unground the scope by plugging it into ungrounded socked.
@alisamerflorin
@alisamerflorin Рік тому
Useful but dangerous.
@AlienRelics
@AlienRelics Місяць тому
Then the entire body of the scope becomes an electrical hazard.
@Mladjasmilic
@Mladjasmilic Місяць тому
@@AlienRelics So what? Sometimes common sense is better than relying on safety systems to protect you.
@anthonymina8398
@anthonymina8398 2 роки тому
You are my inspiration on why I chose Electronics Engineering for my college degree. Thank you, sir. Starting my class in a week. Wish me luck!
@fseeletronicos
@fseeletronicos 2 роки тому
Be prepared for the integrals.
@BobBeatski71
@BobBeatski71 2 роки тому
Nice refresher. 👍
@harsimransinghbawa2724
@harsimransinghbawa2724 2 роки тому
I love your videos sir and i have already learned a lot of new thing by watching to it
@greatscottlab
@greatscottlab 2 роки тому
Glad to hear that
@jacobwigent1931
@jacobwigent1931 2 роки тому
Really well-made video you made this a lot easier to understand!
@greatscottlab
@greatscottlab 2 роки тому
Glad you liked it!
@sairfan06
@sairfan06 2 роки тому
Thanks Scott for the video, now a days most people are reviewing the scopes and this video was most wanted where you are explaining how to use a scope, i hope you will do more videos on this topic, if you could use Siglent or Rigol that would be great as most of hobbyist are using these brands, as they are target audience of these videos that will greatly help.
@jasonbrown467
@jasonbrown467 2 роки тому
i just got a scope for christmas and have no idea what i am doing. this is by far the best video for beginners i have seen so far. all the other vides assume we know the basics
@michaelclark2131
@michaelclark2131 Рік тому
Awsone. You helped me purchase a scope. Simple concise. Excellent !!!!!!
@hansaKg
@hansaKg 2 роки тому
finally!!! I've been waiting this video for long time. Thanx!
@greatscottlab
@greatscottlab 2 роки тому
You are welcome :-) I hope the video answers all your questions :-)
@hansaKg
@hansaKg 2 роки тому
@@greatscottlab Oh it did. Now I can start using my new Rigol scope.
@fullwaverecked
@fullwaverecked 2 роки тому
Being financially challenged has one silver lining; every bit of test kit I own will make a good repair video... Thank you for the scope tips! Very broad in scope. Cheers!
@richardscheffenegger9138
@richardscheffenegger9138 2 роки тому
When working with mains voltage electronics, it's a great idea to actually power the bench with a isolation transformer (and a fast acting, low current fuse,, if your inrush current allows that). Like in a IT grid, that was there have to be two faults, before current can flow (unlike working directly with grounded AC). (The fast acting fuse would also protect the isolation transformer. A 220V/110V dual output transformer with the power rating suitable to your project usually works fine....
@adolfos1991
@adolfos1991 Рік тому
Thank you so much for this valuable video!!
@gtb81.
@gtb81. 2 роки тому
an isolation transformer is always recommended when working on something at mains voltage, that way if a mistake is made your equipment will be less likely to be damaged. it can protect you from a nasty shock as well, or worse
@casperlegendary9380
@casperlegendary9380 2 роки тому
This motivates me to learn more electronis. thanks to you GreatScott!!
@greatscottlab
@greatscottlab 2 роки тому
Glad to hear it!
@Jesperkraakman
@Jesperkraakman 2 роки тому
I wish i heard a “HOLD IT” when I first made this mistake, of connecting the scope ground to the rectifier - of an SMPS…
@mohinderkaur6671
@mohinderkaur6671 Рік тому
kaboom! had my table catch on fire thanks
@glenmartin2437
@glenmartin2437 2 роки тому
Thank you. A nice review.
@makermelissa
@makermelissa 2 роки тому
Thanks. I found this video very useful. I’d love to see some more in depth oscilloscope videos.
@greatscottlab
@greatscottlab 2 роки тому
Thanks for the feedback :-) I will see what I can do
@reggiep75
@reggiep75 2 роки тому
I grew up around oscilloscopes and the like as my dad was a TV engineer and often did various jobs at home for people. I'd look over the edge of the workbench at the green boards, soldering iron and the scope and often hear the odd pop or swear word when a particular job was difficult or something just exploded, ElectroBOOM-style. This was back in the early 80's and by the mid 90's people just dumped broken stuff and bought new stuff, rather than fix it.
@nikims_
@nikims_ 2 роки тому
Great video! This helped a lot in navigating my local hackerspace's scope
@1boobtube
@1boobtube 2 роки тому
Nikola, w2aew has a lot of this is what you can do with an oscilloscope content. I think eevblog has a how not to explode your scope video as well, in addition to this one.
@rbmwiv
@rbmwiv Рік тому
I have the exact same current clamp as the one you showed!
@arfeausmutt9884
@arfeausmutt9884 Рік тому
Parametric analyser was a fancy name for a simple curve tracer. Easy to do on an old scope using a 5vac transformer a resistor and a set of test leads. Set H to Ext drive. H equals sample voltage while V equals current through device under test.
@USAWal
@USAWal 2 роки тому
I just realised that I honestly like Scott's diagrams!
@zaphodbond
@zaphodbond 2 роки тому
I've being teaching myself electronics and I wonder if someone can recommend a tutorial about learning to use an Oscilloscope. Maybe something where you learn by doing projects and then learn ways to debug or test your circuits. This is great by the way it's a good start, thank you!
@deeprobardhan3411
@deeprobardhan3411 2 роки тому
I have bought a hantek USB oscilloscope(20 mhz and 48MSa/s)since i cant afford a DSO, and that works quite ok for my POWER electronic projects. And Thanks sir for all this videos u made . Really appreciate it. Love from India.
@greatscottlab
@greatscottlab 2 роки тому
Very nice!
@rbmwiv
@rbmwiv Рік тому
I found a nice 2 channel 200mhz Tektronix scope used for $200. It was only 2 years old when I bought it a year ago. I started with a Tektronix CRT scope. I used it for many years and still use it sometimes especially since when I need more than 2 channels. 90% of the time a 2 channel scope is all I need that’s why I went with a 2 channel.
@neoncyber2001
@neoncyber2001 Рік тому
Great scope tutorial! I will bookmark this video and send it out to any oscilloscope newbs I find.
@dougsteel7414
@dougsteel7414 2 роки тому
Excellent video, cheers!
@ronvaiz123
@ronvaiz123 2 роки тому
Great as always
@user-jb5yc2ec5w
@user-jb5yc2ec5w 2 роки тому
Scott , you ae the best !!
@theteenageengineer
@theteenageengineer 2 роки тому
Oh thank god! I’ve been waiting for either you or electroboom to come out with a video on how to choose a scope
@flarosantana6330
@flarosantana6330 2 роки тому
Ive been using a board called the espotek labrador that you plug into a computer with software and get various functions like oscilliscope and power supply. It takes some time and knowledge to set up, and may not have the best sampling rate, but if you need a basic oscilliscope for cheap, its like 30$ and works perfectly
@ignispurgatorius5297
@ignispurgatorius5297 Рік тому
Since you recommended differential probes it would be interesting to see a little video for them and what to look out for. Differential probes can come in ultra cheap
@kctecharena116
@kctecharena116 2 роки тому
I like your videos very much and watch them regularly.I have a request for you, please make a sjr looper circuit and show it.
@theGentec
@theGentec 2 роки тому
I recently got myself a Picoscope wich i find quite handy. Im not doing any High Power/High Frequency stuff and use it mainly for 5V logic level and protocol analysis. And for this purpose this is just fine since it also can directly decode Protocols like I2C, SPI and UART. Since it is possible to export the data i was able to do a curve fitting in MATLAB for a step response - super nice :D
@jameskidd7906
@jameskidd7906 2 роки тому
As always a good vid sir! Thank u and 'bravo' but i think u forget the alignement of trace before using the oscillo for the first time with a square signal
@msmith2961
@msmith2961 2 роки тому
Great refresher on oscilloscopes. I'm still using an old 'Goldstar' CRO which does the job just fine for me (analogue audio), but amazed at how cheap the digital ones have got now!
@HackingElectronics
@HackingElectronics 2 роки тому
Once that circuit was connected to mains, I thought the circuit was gonna blow up but sadly we are not in ElectroBoom's channel... Edit: Lol I just saw many comments same as mine.
@keenowl1410
@keenowl1410 11 місяців тому
Great video!
@barnabywilde374
@barnabywilde374 2 роки тому
everyday now i see that i'm a fading technician. So much has changed since i began my hobby/job in the late 1970s. My 20MHz B&K was a home "standard," and i'm in awe of modern oscilloscopes. Now, we REPLACE ENTIRE BOARDS, whereas in my day we replaced mostly components. It's a magical time to be alive now, kids. We have computers in our pockets and advanced electronics that perform all kinds of astounding tricks. And mostly, we have fine folks running video sites like this offering FREE instructions and advice. Thank you!
@2wrdr
@2wrdr 2 місяці тому
I'm right there with you, went to "Tech School" studying Electronics Technologies majored in RF Electronics. My first 2 jobs (Motorola 2-Way Repair Shop then Satellite Receive Only) both jobs I did component level troubleshoot with scopes replacing discrete component and some ICs. For me those were the good ole days and I loved it for the satisfaction of constantly solving the puzzles of failed electronics then seeing my work....well work. Not long after lots of equipment became throw aways and there just wasn't much $ in being an electronics technician. I got lucky with a railroad job that then led me into railway signal engineering which paid much more even though I didn't have an engineering degree I was able to do the work so that worked out well but it was never as fun as doing real component level repair.
@rubabmubarrat
@rubabmubarrat 2 роки тому
I wish I had one :")
@bunny1033
@bunny1033 2 роки тому
Me too
@lukamilicevic1573
@lukamilicevic1573 2 роки тому
Get some analog hameg ones on ebay
@OskarP2601
@OskarP2601 2 роки тому
me too
@greatscottlab
@greatscottlab 2 роки тому
I wish you luck with that :-)
@Shubham-po2tp
@Shubham-po2tp 2 роки тому
@@greatscottlab Thank you
@radiosantigos1894
@radiosantigos1894 2 роки тому
Nice demonstration. Thanks! I only wonder if you can explain a little bit more of the mistake of a regular probe measuring the mains (compared with a battery powered portable oscilloscope, for example). In a future video, of course.
@stuartbridger5177
@stuartbridger5177 2 роки тому
Nice video. This reminds me of when I worked in a repair shop many years ago. We had early Tektronix graphics terminals. For some reason known unto them, the display logic boards had a signal "ground" that was floating at +600V DC. My colleague would unhook the PE from the scope power plug, put a paper notice on the scope (also Tek) Saying "Don't Touch" . Then connect up the scope probes and start diagnostics with the scope case, BNCs, etc, all at +600VDC! Wouldn't be allowed now. We certainly didn't have isolated differential probes available back then. Incredibly dangerous work practice, should not be attempted.
@electronic7979
@electronic7979 2 роки тому
Nice video. I liked it
@kevgermany
@kevgermany 2 роки тому
Good one. Will help many people. Thanks.
@greatscottlab
@greatscottlab 2 роки тому
Hope so
@TurpInTexas
@TurpInTexas 4 місяці тому
Back when I was an early teen and repaired tube TV's, we used an isolation transformer because many of the TV's of that time didn't have a power transformer and hooked one side of the full wave bridge directly to the chassis (a.k.a. a hot chassis) so if you wanted to connect any kind of test equipment, the isolation transformer was a must. Also, if I remember correctly, Tektronix had a line of oscopes where the ground of the probe was isolated from its own chassis and the powerline, so you connect those units probes to a hot chassis with any issues.
@2ndaccount479
@2ndaccount479 2 роки тому
Thank you!
@OldCurmudgeon3DP
@OldCurmudgeon3DP 2 роки тому
The first scope I ever used (in middle school no less) had vacuum tubes and a CRT. Tons of knobs. 2 large RG type probe connections. Weighed several kg and was the size of a medium suitcase. No manual, but somehow I managed not to blow it or myself up even when messing w/ an AC stepdown transformer.
@RajuSingh-kq3lh
@RajuSingh-kq3lh 2 роки тому
Great work.keep it up sir
@greatscottlab
@greatscottlab 2 роки тому
Thank you, I will
@MrJugsstein
@MrJugsstein 2 роки тому
Thanks great info
@syaduinotech3681
@syaduinotech3681 2 роки тому
Very good content. You inspired me about electronics. Seems like I want to get a degree in this field. So exciting learn from you..
@greatscottlab
@greatscottlab 2 роки тому
Best of luck!
@theomaia1460
@theomaia1460 2 роки тому
great video as always tysm
@AubsUK
@AubsUK 5 місяців тому
Great, as always. I'd love to see a review of some of the cheap (
@fireracerworkshop8251
@fireracerworkshop8251 2 роки тому
Really amazing video. I've been using oscilloscopes for more than 2 years now. I've never seen such a comprehensive tutorial about using oscilloscopes. Great job great Scott!!!!
@greatscottlab
@greatscottlab 2 роки тому
Thanks mate :-)
@jamesgoacher1606
@jamesgoacher1606 2 роки тому
Thank you. Too often the basics are forgotten about and I am one of those who would benefit by their inclusion.
@greatscottlab
@greatscottlab 2 роки тому
Glad to help :-)
@oldsparks3177
@oldsparks3177 2 роки тому
I used to repair swm PSU s . The golden rule is to feed it via a mains isolation transformer, then you can safely connect the earthed ground wire of your scope probe to the circuit board without creating any problems .
@psubond
@psubond 2 роки тому
Dave at EEVblog did a similar vid called "how to not blow up your oscilloscope ", i suffest watching that one too.
@JAYANTHISUDUPIRECIPES
@JAYANTHISUDUPIRECIPES 2 роки тому
Hello Scott nice video 👍👍
@greatscottlab
@greatscottlab 2 роки тому
Glad you enjoyed it
@Willeexd1337
@Willeexd1337 2 роки тому
Nice i just got my first "scope" (DSO138 kit) so this is perfect for me
@greatscottlab
@greatscottlab 2 роки тому
Awesome :-)
@meowcula
@meowcula 2 роки тому
Once you get an oscilloscope, you'll wonder how you ever lived without one. I ended up getting a Rigol and I can definitely recommend them for a budget scope.
@nil3010
@nil3010 2 роки тому
The more know about oscilloscope more I want one man it will be really helpful thing to have
@greatscottlab
@greatscottlab 2 роки тому
It is pretty much essential to a lot of projects.
@nil3010
@nil3010 2 роки тому
@@greatscottlab As someone who works with amplifier and op amps it is essential
@prathameshraikar5428
@prathameshraikar5428 2 роки тому
thank you for exploring us with something new :-):-)
@greatscottlab
@greatscottlab 2 роки тому
My pleasure 😊
@gene_Code
@gene_Code 2 роки тому
That keysight oscilloscope is damn neat. still saving up money to get one.
@robinsattahip2376
@robinsattahip2376 6 місяців тому
I was hoping you would talk about isolation transformers, please. Thanks, as usual, your videos are great.
@TheBlibo
@TheBlibo Рік тому
Hi Electronics was only ever a hobby for me and I stopped at analogue stuff In my job years ago doing engine development we had the use of a scope only single channel and no storage facility, if you wanted storage you clipped a Polaroid camera to the screen hi tech back then, isn't it wonderfully that you can now download an app to use your phone as a scope Keep up.the good work
@martinoptilon9915
@martinoptilon9915 5 місяців тому
Thanks for sharing your knowledge in a very straightforward and comprehensible way. Now I just have to save up to buy the cheapest oscilloscope I can find :)
@Yotanido
@Yotanido 2 роки тому
Already knew about the problem with measuring mains referenced voltages from EEVBlog, but it was a nice refresher. ...not that I have an oscilloscope. Or, for that matter, do much with electronics...
@dylanvient6360
@dylanvient6360 2 роки тому
Some how I'm coming back now 7 years later when I used to watch your videos when I was a kid and realizing what I put behind me
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