Very good video and very nicely explained. And you're correct in measuring the power supply output under load to get the best representation of ripple. Well done.
GR8T refresher course for us "part-timers". It really sunk in this time. I plan to consider myself a trained professional in the area of "watching these videos" 🙄 Thanks so much!
Very nice explanation as Big G has mentioned. And I agree with the others, keep the series going on regulation and control of all the different voltages most circuits use. Good job, thanks.
Thank you sir. I will do the odd tuturial whenever I need something in one of my builds. I have, by the way, just received a ton of bare PCBs from China, so there will be some more coming soon :)
great explanation for me as a new comer. did not quite understand why you have to change from dc coupling to ac coupling to measure the ripple, if you can explain that again to me.thanks john
Thank you for your efforts to share what you know. It is most kind and gracious of you. The video makes a clear and easily understandable teaching of the subject. Good job.
Thanks a lot, first video on oscilloscopes that are down to earth and with a practical and simple example that are wary informative and easy to understand!! I will try to se if you have made more. :-)
Thanks for your fast and wary positive answer! :-) It would be fantastic if you could make more videos on what gear you realy need, as a beginner, and why. I am just startet and know nothing. I have a power supply and a cheap 15$ multimeter, that's it, and I know a bit on why and what they are good fore. Often people just make a long list of things "you got to have", 4 multimeter to 200$ each, a function generator, an analog and a digital oscilloscope, frequency counter, function generator, 3 power supplies, logic analyzer and and and!!! but I ask why? :-)
Man, you rock! I tried to find an instruction of how to do that but all what I saw was some rubbish where people were using some highly advanced modern digital oscilloscopes that basically told them that by itself. You not only showed us how to do the measurement but also how to do that on an old analogue devices!! Thank you!! Also theory is always useful!! Great job! (I wish you had a better camera though)
Really awesome vid! I am trying to teach myself hobby electronics and have been watching vids galore and my head hurts from reading so much on this! That was well explained,very informative and to the point. I think I'm eventually getting it. It must be good if its penetrating my thick skull! :)Joking aside it really did make the penny drop for me...thanks for sharing!
great video, but I was a little unsure what all these resistors did and how you took the measurement from the PSU... did you just plug in the scope to the ends of fx the PSUs barrelplugs + and -or did you use these resistors to remove ground lead noise... as I often heard it is preferred to use as ælittle ground lead as possible when measuring noise & ripple. // yep, it seems you have connected a female DC plug, and there plug in the barrel plug from the PSU. 7:59
Very nice explanation. Are all AC adapters that inaccurate? 18 volts instead of 12, with a 0.4 volt variation seems quite bad... I wonder what a laptop charger voltage ripple looks like
Very well done ripple tutorial. I don't have a scope can I get an approximate ripple measurement with my fluke multimeter measuring AC on a DC power supply output? Could you demonstrate and compare the multi-meter reading to the actual scope reading. I am sure the multi meter would give some kind of RMS reading for a saw tooth wave form correct?
Thanks for your share! Awesome work Btw 14:15 That's actually a 12V VAC adapter, since (18 / Square root 2) = 12VCC, i don't know if you were referring to this
Hi first of all thanks for the really educational video. Then I would like to ask a question related to power supplies of audio amplifiers. In some cases some manufacturers offer an upgraded version of a same amplifier with greater capacity in the power supply section with everything else unchanged. What kind of sound enhancement can produce an increase in uF in the power supply ?
If your decoupling capacitors are small-ish, you will hear some artifacts in the bass and drums and other low-frequency parts of the music. It's kind of hard to explain what it sounds like, but it's like the amplifier is unable to contorl the speaker-cone properly, and the low-frequency signals come out "jelly" or "wobbly". I think I should try and make a video about it, when I have some spare time.
Hi thank you very much indeed for your very kind and valuable reply. I will be waiting for that video for sure. Capacitors are a topic very intriguing to me. It is also impressive the difference in performance from brand to brand. I hope to be right in thinking that, in any case, the higher the ripple current of a capacitor the better also for a use in an audio amplifier. Actually i am in the middle of a upgrade project. I have a stereo amp with two smallish 4700uF caps in the power supply. I am thinking to replace them with two higher grade caps about 15000-22000 uF each ... and listen for improvements in the sound. At present during louder passages i hear some kind of hardening of the sound. I hope not to destroy the amp in the process. Thanks a lot again. Kindest regards, gino
Great video!! Thank you. I bought the same oscilloscope. When measuring DC from a car battery, it shows 60 Hertz. I thought that was only for AC. Should I ignore or see if the manufacturer can swap it out?
I am not sure exactly what is going on there. Where does it say 60 Hz on your scope? How much 60Hz hum is there - in volts peak to peak? Do you measure with the battery disconnected? I assume you measure DC somewhere in the range of 12V-14V?
Are you in the US? You are probably picking up noise. Try a small 9volt battery with its terminals being close together you'll get less noise. Pull the ground wire off the probe and use the supplied spring that came in the probe package you should see even less noise. If you hit auto on the scope instead of manual setup the scope probably guessed wrong and selected ac coupling if you don't see the 12 volts on the trace. DC coupled and the vertical scale large enough to see 12 volts you probably won't see much ripple. I doubt there is anything wrong with the scope. With the ground lead flapping in the breeze the spring clip probe cap plunger thingy on and touching the tip just right I get about 4v peak to peak noise.
@@DecimalZer0 , Great. Btw eevblog has a "how not to blow up your scope" video and w2aew has some probing techniques videos. Allan's day job is a tektronix application engineer so his scope and other tutorials are very good.
please make a video for measuring current and voltage separately by oscilloscope and multimeter while having load. i had searched on youtube for such but not fully explained that i can do same. I am waiting for that video. Please response my arguments. I want to make my power supply unit without transformer according to my requirement of desired current(DC) and voltage. Please response soon. Thanks for your video.
Sorry for a silly question. But what is the purpose of the AC/DC switch on the digital scope, if you can just use the Y axis adjust to move it up and down anyway?
Dear NatureAndTech, is it possible for you to do a video on how the AC voltage reading on a multimeter changes when changing the capacitance value in a bridge rectifier? I am doing the similar experiment and Im getting the same readings :/
Infact my readings for the AC voltage are higher than the DC voltage readings when i connect the multimeter across the resistor. Am i doing something wrong? I hope you can make a video on this it will help a lot!
A very useful video, but I have a question: now when we want to measure ripple on the oscilloscope, does the ripple become our peak to peak value? I would be glad if you help. Thank you sir!
First two facts: 1) Ripple is typically measured on a power supply (e.g. output of a transformer or switch mode supply) that will feed an electronic circuit. 2) Now, all circuits have a minimum voltage where it will stop working, and a maximum voltage where it will also (catastrophically) stop working. Secondly: Here is a very exaggerated example: Let's say you have a 12V DC voltage supply with a very short and deep spike (maybe down to 0V) every 50 or 60 Hz cycle. Clearly this will screw up your circuit. Measuring the RMS value of the ripple would result in very close to 0V, while the peak-peak value would be 12V. So, for practical reasons, I believe ripple should be measured in peak-peak, and not average or RMS. Hope this helps :)
Thank you for this tutorial! I love it! One question: I also have a Rigol, how did you wire the probe to measure ? I see that you change from DC to AC without touching the probe! or did you ? Thank you man!
The ground clip is connected to the circuit (adapter output's) ground, the probe tip to the voltage you want to measure. Note that the ground clips are connected internally in the oscilloscope. What that means is that you can not connect the ground clip of one probe to a point on your circuit, and the ground clip of another probe to a different point in your circuit, as it would create a short through the scope. Sorry if I am stating the obvious. Changing from AC to DC is done using a screen-menu that pops up when pressing the CH1, CH2, CH3 and CH4 buttons respectively. If you didn't see the change, it must have been because of my poor editing skills.
Hi i saw your vidéo but i dont understand why you put resistor charge to measure ripple ,id like to see your set up on shematic it would be more clear for me .thanks
NATUREANDTECH, AC ripple Water analogy, if there is no AC ripple the water flow is EVEN. If their is AC Ripple the AC ripple makes water ripples waves in the water because does it "alter" the water flow?
Concerning electrolytic capacitors for a tube guitar amplifier for filtering & coupling. Please tell me what is the perimeter that I am looking for, High or Low Ripple current ratings when comparing capacitors for a Tube Guitar amplifier.
For amplifiers you can actually live with quite a lot of ripple. This is because audio amplifiers use negative feedback to stabilize the amplifier output to the speakers. You can google "power-supply rejection ratio". PSRR is typically 60dB or so, meaning that any changes on the amplifiers output due to ripple will be 60dB smaller than the actual ripple on the power supply. So, in conclusion, the electrolytic capacitors for filtering the power supply is not very critical. In fact, in a lot of power amplifiers, they don't even bother putting a voltage regulator. The amplifier can be powered directly from the voltage across the electrolytic filter capacitor.
Thank you for taking time to explain this to me. Just for clarification, when I look at the ripple current of a capacitor, I am looking at the maximum ripple current that the cap can handle before heating up and changing in value. Is that a correct statement?
That's correct. It's not that the capacitor will immediately self-destruct, but the heating up will reduce the life-span of the capacitor. If you worry about that, you can buy high-temperature capacitors with very low internal series resistance (at a premium).
Great video thanks. I'm surprised ripple is not expressed as a percentage of the DC instead of voltage. For example a 300mV ripple on 2KV supply is nothing, but it is on a 3.3v supply.
You are right. Percentage (or dB) would be a great way to express the ripple. Any engineer or technician would be able to understand it too, so I don't see why not.
Hi if i measure ripple on tube supply 450 v dc ,i must take measure with 10x .probe am, i correct ,i got a tecktronix with ac dc coupling ,can i use this to measure my supply ,i am a beginner for this measure ,thanks@@NatureAndTech
Can you measure even small ripple of very low voltages, like 1% ripple of 50 mV, with those oscilloscopes you use? Namely the Rigol DS1054Z. I would like to do that and am not sure which oscilloscope I need.
You would need to put an amplifier on front of the scope to see 1% of 50mv. The old tektronix maybe a 2225 had a 500 uV per division sensitivity on the front end. A high count dual display multimeter that does DC +AC might show you rms ripple as you adjusted the 50mv supply voltage or put loads on it.
Hi Ryan, An oscilloscope is not like a multimeter. A multimeter set to AC will typically measure the AVERAGE or RMS voltage of the signal, and show that. An oscilloscope on the other hand, will show you the signal exactly as it is. It does not perform any averaging or any other mathematics to the signal. So, when setting the oscilloscope input to AC, it will not do any maths, except move the trace down so that it is shown around the zero line. A 12V AC power supply actually has a signal that swings from -18 to +18V. The reason it is called a 12V AC power supply, is because it is only able to perform the same amount of work as a 12V DC power supply. I hope this explains it?
Ah okay but as you said the AC swings from -18 to +18V so why does the line jump up when we switch it to DC? because isn't the AC already swinging from -18 to 18V?
Yes you can say that. AC mode shows the AC part of the voltage. DC mode shows everything (DC+AC, so maybe the term DC on the front panel is not such a good name, but everybody calls it that).
The UK used to have 240V and the rest of Europe 220V. When the grids were connected together, they agreed on 230V, since it was within the tolerances of both the UK and the European supplies.
Why do you want to use an instrument like a DMM that gives you as little information as possible, if you have access to an oscilloscope? Your Sanwa multimeter can not detect any spikes or dips or drop-outs. All it does it give you an average (or RMS) value.
@@NatureAndTech you dont , But just saying , if you are interested in noise you will quickly learn there are levels to it , you want to use a scope , but not if it gives you same reading as more simple setup like DMM Why bother , so there are levels to this , this is just one ruclips.net/video/pKXPqApOYfk/видео.html
That is true. Where in the video do you see that? Isn't it because the analog 'scope is using a x10 probe? Analog scopes do not have a function to automatically scale values in the display.
Brings back memories of the first time we were introduced to power supply design. Your video was spot on. Thank you.
You sound like Arnold Schwarzenegger explaining it :). Nonetheless, it was an awesome explanation!
Very good video and very nicely explained. And you're correct in measuring the power supply output under load to get the best representation of ripple. Well done.
Excellent video so simply explains why we need a capacitor and also helps to learn about a diode. Very easy to understand
Thanks. If there are any subjects you like me to cover, let me know.
GR8T refresher course for us "part-timers". It really sunk in this time. I plan to consider myself a trained professional in the area of "watching these videos" 🙄 Thanks so much!
I have a Rigol 1054z too and have tried to make this very same measurement. Great job explaining things...very clear explanation!
This is a great video for people like me who are just getting started in the field of electronics. Keep up the fantastic work!
Thank you Oscar. If there is any subject you would like me to cover, please feel free to ask.
Very nice video. Showing the measurements on analog and digital scopes was very helpful. Thank you for sharing.
Very nice explanation as Big G has mentioned. And I agree with the others, keep the series going on regulation and control of all the different voltages most circuits use. Good job, thanks.
Thank you sir. I will do the odd tuturial whenever I need something in one of my builds. I have, by the way, just received a ton of bare PCBs from China, so there will be some more coming soon :)
great explanation for me as a new comer.
did not quite understand why you have to change from dc coupling to ac coupling to measure the ripple, if you can explain that again to me.thanks
john
Thank you for your efforts to share what you know. It is most kind and gracious of you. The video makes a clear and easily understandable teaching of the subject. Good job.
Thanks a lot, first video on oscilloscopes that are down to earth and with a practical and simple example that are wary informative and easy to understand!!
I will try to se if you have made more. :-)
Thank you so much. If you have any questions about electronics, I will do the video. I am very interested in doing more videos like this.
Thanks for your fast and wary positive answer! :-)
It would be fantastic if you could make more videos on what gear you realy need, as a beginner, and why.
I am just startet and know nothing. I have a power supply and a cheap 15$ multimeter, that's it, and I know a bit on why and what they are good fore.
Often people just make a long list of things "you got to have", 4 multimeter to 200$ each, a function generator, an analog and a digital oscilloscope, frequency counter, function generator, 3 power supplies, logic analyzer and and and!!! but I ask why? :-)
That's a great idea. I will do that for sure.
Thanks a lot, it can only be great enjoy to watch!! :-)
Great Video , I am doing a Advanced Ham Radio course in the UK , this is very helpful .Thank you for your time doing it ,Roger
You´re welcome, and good luck with your Ham radio course.
Very good, Sir. You would have been an excellent instructor of mine way back when......
Thanks. Very informative video. Thumbs up.
best explanation!
Thank you. Any other subject I can help with?
Great explanation, thank you! You make it pretty easy to understand :)
Thank you
Man, you rock! I tried to find an instruction of how to do that but all what I saw was some rubbish where people were using some highly advanced modern digital oscilloscopes that basically told them that by itself. You not only showed us how to do the measurement but also how to do that on an old analogue devices!! Thank you!! Also theory is always useful!! Great job! (I wish you had a better camera though)
You are welcome, and I know the camera is crap in low-level light. I'll try improving the lighting in future.
Very clarifying. Thank you for this video
Thank you. This topic is exactly what I wanted.
You're welcome. Anything other topic, I can help with?
Really awesome vid! I am trying to teach myself hobby electronics and have been watching vids galore and my head hurts from reading so much on this! That was well explained,very informative and to the point. I think I'm eventually getting it. It must be good if its penetrating my thick skull! :)Joking aside it really did make the penny drop for me...thanks for sharing!
Thank you so much for the nice words, and you are very welcome. I like feedback from the viewers. Anything else I can help explain?
Great Video. Thanks a lot... what about Ripple current and how to calculate in percentage form?
Excellent video for newbies like me. Thank you. Subscribed!
Keep the good work, thanks alot for the beautiful effort.
Well done 👍 very good presentation.
great video, but I was a little unsure what all these resistors did and how you took the measurement from the PSU... did you just plug in the scope to the ends of fx the PSUs barrelplugs + and -or did you use these resistors to remove ground lead noise... as I often heard it is preferred to use as ælittle ground lead as possible when measuring noise & ripple.
// yep, it seems you have connected a female DC plug, and there plug in the barrel plug from the PSU. 7:59
Excellent explanation. Thank you for sharing your knowledge.
Very nice explanation. Are all AC adapters that inaccurate? 18 volts instead of 12, with a 0.4 volt variation seems quite bad... I wonder what a laptop charger voltage ripple looks like
The adapter I am using is unregulated. Laptop power supplies normally have some kind of voltage-regulatorion built in, and their power is accurate.
Another excellent video... Thanks! Lloyd - DigiTek
Thank you for this tutorial. It really helped.
Any time :)
Great video! Can you provide with better explanation of the physical setup?
Great explanation. Keep these tutorials coming. THKS
Thanks, and will do :)
Very well done ripple tutorial. I don't have a scope can I get an approximate ripple measurement with my fluke multimeter measuring AC on a DC power supply output? Could you demonstrate and compare the multi-meter reading to the actual scope reading. I am sure the multi meter would give some kind of RMS reading for a saw tooth wave form correct?
That is correct. You can set it to AC and then you will get the RMS reading for the saw-tooth (If your meter is true RMS).
Thank you. Just what I was looking for
You're welcome.
Thanks for your share! Awesome work
Btw 14:15 That's actually a 12V VAC adapter, since (18 / Square root 2) = 12VCC, i don't know if you were referring to this
That's right.
Hi first of all thanks for the really educational video. Then I would like to ask a question related to power supplies of audio amplifiers. In some cases some manufacturers offer an upgraded version of a same amplifier with greater capacity in the power supply section with everything else unchanged. What kind of sound enhancement can produce an increase in uF in the power supply ?
If your decoupling capacitors are small-ish, you will hear some artifacts in the bass and drums and other low-frequency parts of the music. It's kind of hard to explain what it sounds like, but it's like the amplifier is unable to contorl the speaker-cone properly, and the low-frequency signals come out "jelly" or "wobbly". I think I should try and make a video about it, when I have some spare time.
Hi thank you very much indeed for your very kind and valuable reply. I will be waiting for that video for sure. Capacitors are a topic very intriguing to me. It is also impressive the difference in performance from brand to brand. I hope to be right in thinking that, in any case, the higher the ripple current of a capacitor the better also for a use in an audio amplifier. Actually i am in the middle of a upgrade project. I have a stereo amp with two smallish 4700uF caps in the power supply. I am thinking to replace them with two higher grade caps about 15000-22000 uF each ... and listen for improvements in the sound. At present during louder passages i hear some kind of hardening of the sound. I hope not to destroy the amp in the process. Thanks a lot again. Kindest regards, gino
@@NatureAndTech you r really great
@@NatureAndTech awesome, you explains very well. You are good lecturer for me
Great video!! Thank you. I bought the same oscilloscope. When measuring DC from a car battery, it shows 60 Hertz. I thought that was only for AC. Should I ignore or see if the manufacturer can swap it out?
I am not sure exactly what is going on there. Where does it say 60 Hz on your scope? How much 60Hz hum is there - in volts peak to peak? Do you measure with the battery disconnected? I assume you measure DC somewhere in the range of 12V-14V?
Are you in the US? You are probably picking up noise. Try a small 9volt battery with its terminals being close together you'll get less noise. Pull the ground wire off the probe and use the supplied spring that came in the probe package you should see even less noise. If you hit auto on the scope instead of manual setup the scope probably guessed wrong and selected ac coupling if you don't see the 12 volts on the trace. DC coupled and the vertical scale large enough to see 12 volts you probably won't see much ripple. I doubt there is anything wrong with the scope. With the ground lead flapping in the breeze the spring clip probe cap plunger thingy on and touching the tip just right I get about 4v peak to peak noise.
That worked, thank you. No more Auto for me. 👍
@@DecimalZer0 , Great. Btw eevblog has a "how not to blow up your scope" video and w2aew has some probing techniques videos. Allan's day job is a tektronix application engineer so his scope and other tutorials are very good.
please make a video for measuring current and voltage separately by oscilloscope and multimeter while having load. i had searched on youtube for such but not fully explained that i can do same. I am waiting for that video. Please response my arguments. I want to make my power supply unit without transformer according to my requirement of desired current(DC) and voltage. Please response soon. Thanks for your video.
Sorry for a silly question. But what is the purpose of the AC/DC switch on the digital scope, if you can just use the Y axis adjust to move it up and down anyway?
You will get much better accuracy with the AC range.
very helpful, thank you!
good explanation, but i have a Hantek DSO-2150 and i don't recall a gain knob or switch.
I'm not familiar with Hantek, but it is also typically called, Vertical, Volts/div, Scale, or something like that.
Great vid, thanks for explanation.
Thank you. I appreciate it.
How about using a switch mode PSU and showing what the Fourier mode on the 'scope makes of the frequencies coming out.
Very interesting exercise. I will have a look at it.
EXCELLENT video thank you
Thank you
Dear NatureAndTech,
is it possible for you to do a video on how the AC voltage reading on a multimeter changes when changing the capacitance value in a bridge rectifier? I am doing the similar experiment and Im getting the same readings :/
Infact my readings for the AC voltage are higher than the DC voltage readings when i connect the multimeter across the resistor. Am i doing something wrong? I hope you can make a video on this it will help a lot!
Thank you for your feedback. I will do a video.
very knowledgeable thanks sir
Hej, rigtig god video.
Tusind tak. Hvis der skulle være andre emner...
A very useful video, but I have a question: now when we want to measure ripple on the oscilloscope, does the ripple become our peak to peak value? I would be glad if you help. Thank you sir!
First two facts:
1) Ripple is typically measured on a power supply (e.g. output of a transformer or switch mode supply) that will feed an electronic circuit.
2) Now, all circuits have a minimum voltage where it will stop working, and a maximum voltage where it will also (catastrophically) stop working.
Secondly:
Here is a very exaggerated example:
Let's say you have a 12V DC voltage supply with a very short and deep spike (maybe down to 0V) every 50 or 60 Hz cycle. Clearly this will screw up your circuit. Measuring the RMS value of the ripple would result in very close to 0V, while the peak-peak value would be 12V.
So, for practical reasons, I believe ripple should be measured in peak-peak, and not average or RMS.
Hope this helps :)
@@NatureAndTech ty so much sir have a good day!
Thank you for this tutorial! I love it! One question: I also have a Rigol, how did you wire the probe to measure ? I see that you change from DC to AC without touching the probe! or did you ? Thank you man!
The ground clip is connected to the circuit (adapter output's) ground, the probe tip to the voltage you want to measure. Note that the ground clips are connected internally in the oscilloscope. What that means is that you can not connect the ground clip of one probe to a point on your circuit, and the ground clip of another probe to a different point in your circuit, as it would create a short through the scope. Sorry if I am stating the obvious.
Changing from AC to DC is done using a screen-menu that pops up when pressing the CH1, CH2, CH3 and CH4 buttons respectively. If you didn't see the change, it must have been because of my poor editing skills.
thanks for explaing. thanks a lot
Thank you
Thank you very intresting
Great video. Thanks!
Any time.
Hi i saw your vidéo but i dont understand why you put resistor charge to measure ripple ,id like to see your set up on shematic it would be more clear for me .thanks
If there is no load on the output, there is nothing to discharge the capacitors and there is no ripple.
Brilliant!
Thank you so much!
You are great, thanks
Thanks.
NATUREANDTECH,
AC ripple Water analogy, if there is no AC ripple the water flow is EVEN.
If their is AC Ripple the AC ripple makes water ripples waves in the water because does it "alter" the water flow?
Concerning electrolytic capacitors for a tube guitar amplifier for filtering & coupling. Please tell me what is the perimeter that I am looking for, High or Low Ripple current ratings when comparing capacitors for a Tube Guitar amplifier.
For amplifiers you can actually live with quite a lot of ripple. This is because audio amplifiers use negative feedback to stabilize the amplifier output to the speakers.
You can google "power-supply rejection ratio". PSRR is typically 60dB or so, meaning that any changes on the amplifiers output due to ripple will be 60dB smaller than the actual ripple on the power supply.
So, in conclusion, the electrolytic capacitors for filtering the power supply is not very critical. In fact, in a lot of power amplifiers, they don't even bother putting a voltage regulator. The amplifier can be powered directly from the voltage across the electrolytic filter capacitor.
Thank you for taking time to explain this to me. Just for clarification, when I look at the ripple current of a capacitor, I am looking at the maximum ripple current that the cap can handle before heating up and changing in value. Is that a correct statement?
That's correct. It's not that the capacitor will immediately self-destruct, but the heating up will reduce the life-span of the capacitor. If you worry about that, you can buy high-temperature capacitors with very low internal series resistance (at a premium).
Excellent!
Thank you.
Great video
Not P. Diddy, but close :)
Power 12 v 3 Amper bridge 5a Good capacitor ? Thanz
Great video thanks. I'm surprised ripple is not expressed as a percentage of the DC instead of voltage. For example a 300mV ripple on 2KV supply is nothing, but it is on a 3.3v supply.
You are right. Percentage (or dB) would be a great way to express the ripple. Any engineer or technician would be able to understand it too, so I don't see why not.
Nice Job.
hi can i measure ac ripple with a probe to 1x with a scope rated to 300v peak max. thanks
If you mean the ripple on top of a DC voltage of less than 300VDC, you sure can :)
Hi if i measure ripple on tube supply 450 v dc ,i must take measure with 10x .probe am, i correct ,i got a tecktronix with ac dc coupling ,can i use this to measure my supply ,i am a beginner for this measure ,thanks@@NatureAndTech
dit engelsk lyder som om du er dansker, har jeg gættet korrekt
Det løber jeg nok ikke fra.
Can you measure even small ripple of very low voltages, like 1% ripple of 50 mV, with those oscilloscopes you use? Namely the Rigol DS1054Z. I would like to do that and am not sure which oscilloscope I need.
The lowest range is 10 mV/division, so I would say no to that.
You would need to put an amplifier on front of the scope to see 1% of 50mv. The old tektronix maybe a 2225 had a 500 uV per division sensitivity on the front end. A high count dual display multimeter that does DC +AC might show you rms ripple as you adjusted the 50mv supply voltage or put loads on it.
very nice video sir
Thank you. Any other subject you would like to see covered?
Good video
Half wave creates the Loch Ness monster!
Looks very much like it, but easier to find :D
This just remind me my University times
Good or bad? :D
@@NatureAndTech well ... I'm having much more fun working
Thanks👍
why does the voltage still become unstable even though it was switched back to AC? and i didn't understand why the voltage increases to 18
Hi Ryan,
An oscilloscope is not like a multimeter. A multimeter set to AC will typically measure the AVERAGE or RMS voltage of the signal, and show that. An oscilloscope on the other hand, will show you the signal exactly as it is. It does not perform any averaging or any other mathematics to the signal. So, when setting the oscilloscope input to AC, it will not do any maths, except move the trace down so that it is shown around the zero line.
A 12V AC power supply actually has a signal that swings from -18 to +18V. The reason it is called a 12V AC power supply, is because it is only able to perform the same amount of work as a 12V DC power supply.
I hope this explains it?
Ah okay but as you said the AC swings from -18 to +18V so why does the line jump up when we switch it to DC? because isn't the AC already swinging from -18 to 18V?
Ah OK. Because I have rectified it with the diode and the capacitor. All that is left is the 18V DC after the rectifier, and the little bit of ripple.
is the reason why the line jumps down when you switch it from DC to AC because the 'AC' mode measures the AC part of the DC voltage?
Yes you can say that. AC mode shows the AC part of the voltage. DC mode shows everything (DC+AC, so maybe the term DC on the front panel is not such a good name, but everybody calls it that).
Curious, where are you located that has 240vac at 50 hz?
Actually it's 230V. I'm in Denmark.
The UK used to have 240V and the rest of Europe 220V. When the grids were connected together, they agreed on 230V, since it was within the tolerances of both the UK and the European supplies.
basically my Sanwa PC510 DMM will do that , quicker , easier and probably more precise
Why do you want to use an instrument like a DMM that gives you as little information as possible, if you have access to an oscilloscope? Your Sanwa multimeter can not detect any spikes or dips or drop-outs. All it does it give you an average (or RMS) value.
@@NatureAndTech you dont ,
But just saying , if you are interested in noise you will quickly learn there are levels to it , you want to use a scope , but not if it gives you same reading as more simple setup like DMM
Why bother , so there are levels to this , this is just one ruclips.net/video/pKXPqApOYfk/видео.html
🇳🇱🤪🤪🤪🤪🤪👍👍👍👍👍
Thank you
50mV != 0.5 V :-)
That is true. Where in the video do you see that? Isn't it because the analog 'scope is using a x10 probe? Analog scopes do not have a function to automatically scale values in the display.
I'm sorry - I didn't spot that you were using x10 probe when I was watching it 1st time
No worries. The 1st law of engineering is always to be critical of other people's work. Thumbs up!
Great video