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U should work on your audio. Sounds like u are in a tornado ^^ Maybe u should fix that first ^^

Would not using coax suffice. Reworked correctly this is the best way to fully minimize the loop area.

Really good demonstration, clearly illustrating the advantages of switching regulators, and I really like the pin compatibility & simplicity of using CUI's P78-500 series. CUI's P7812 are used in a product line we will purchase, and I am wondering about RFI, since these devices will be very near VHF radio receivers (~8 inches away). Linear supplies are known to be very clean since there is no switching. I see in CUI's P78-500 series spec sheet that caps are recommended on the input & output. Am I correct in assuming that these are used to filter out switching noise and/or prevent oscillations? If so, what if they are left out? There are no caps on the P7812 for the product line we are purchasing. The product previously had a linear power supply, but the supplier simply substituted the P7812 to handle an increased input voltage of 48VDC.

that is very ironic having a video about noise and the audio has almost more noise than information.

Youre audio is full of interferece as a bacground noice 🙄 something you maby could do something about. Good luck from Sweden. SB.

Nice work

Video is great Thank you very much indeed.

Why wouldn't ripple be AC RMS? Peak to peak can be exaggerated if it has small spikes.

Excellence suggestions.

Say I had a 20amp regulated power supply, how do you calculate the values of the Electrolytic and ceramic capacitors? Much appreciated

Some good ripple and noise in that audio lol.

Very good professional guide.

Thanks, very good explanation 🙂👍

🤩 "Promo SM"

Hello friend, I'm watching from Bangladesh 🇧🇩, Nice programme, thanks

Thank you so much appreciate it if I may critique because I'm a student of videos I watch. I feel the speed that you were set up Your instrument was for people who already Know how to do what you do! Which kind of I think defeats the purpose of your video I couldn't tell which graph is for what? when you were sent up the scope slow down and explain what you are pressing And elaborate if you can. I wish I knew every button that you press and what they are for.

We use VMS-300A-24-CNF and apply for safety approval. In the specification, this device is compliant with IEC-60601-1 ed4. Please let me know your technical support for detail.

I don't get it; your measuring voltage with one lead?

P R O M O S M

So ... I really object to the 20MHz bandwidth limit. It may have been the bees knees back 55 years ago when 20MHz scopes were the best there was and when 99.997% of all products were immune to noise much over a few MHz. That is not longer the case. Even me as a hobbyist can put together a small computer that is badly effected to power supply noise well in excess of 20MHz. Indeed even 30 year old microprocessor based systems utilized and were sensitive to frequencies in the 100's of MHz. The industry needs to pull up it's sock on this one and get real. The noise on that small PS before you switched in the 20MHz bandwidth limit was unacceptable. Just to be clear, I have no issue with your probing advice and technics, it's only the outdated bandwidth limitations.

Excelente

Excellent explanation

Nice video and another way when working on Government power supplies as I did in the past as was in the test procedures for external noise when using something like the paper-clip method, was to connect a (0.1uf cap) between the probe tip and ground lead. Of course having a high voltage ceramic cap way above what was being measured for test purposes, this worked very well for removing stray & unwanted noise and gave true output noise readings.

After watching the video my question is, What must you do to measure the peak-to-peak Voltage of ripple?

I am looking for a Dc Switching Regulator that I can use on a E bike. That I can tie a usb phone charger to it. I would use the bikes battery that can range from 54 VDC (full charge) to as low as 40 VDC when bike is exhausted. I would need a constant 12 VDC output from the Regulator, no matter what the input voltage is from the bike battery. I would tie that 12 volts output to a usb charger, that in turn would drop the voltage to 5 VDC to charge my phone. Any ideas on what is out there that would serve this purpose? Looking for something small, since it would be mounted on a bike. Thanks

Thanks a lot. Great comparison and explanation.

Surface power supply can filter out all that switching noise . . . .

My newbee experience(s) exactly. Thank you.

Good video

ignoraba este nuevo semiconductor hasta que el estudio de los LED me enseño el nitruro de galio. gracias

Good video. But I do question the relevance of the measurements when a PSU is connected to a circuit (in use). Any wires away from the PSU output are likely to introduce the same issues as the ground clip method. So on the one hand you can validate the spec sheet, but it does little to assist with the actual business of getting the "lab" results in practice.

Very worth reiterating to the newbies that the PSU is connected to a bench AC supply and NOT directly to mains. You should not connect the ground clip AT ALL if the power supply is not isolated!

GREAT!!!

Thank you. You answered all my questions regarding GaN power supply.

IMHO, electronic load also makes the difference. On my setup, the electronic load will make things more complicated. The waveform is heavily disturbed by it. Finally, I used pure resistor load.

Maybe your company should research more efficient microphones next.

Very good and concise explanation. Thanks

Appreciate the information.... Great job nailing that 80s handycam audio 🤠 really takes us back a ways.

Informative video, but. poor sound quality.

Wow, I just learned a lot really quickly! 👍✌️

sir, why 10uF electrolyte and 1uF ceramic capacitor was connected across the output before probing? What are the precautions to be taken for measuring ripple in HV output (1000V, 1mA)

Are those probes available? Or the schematics or mechanical 3d models, say in Rhino, or SolidWorks? What min bandwidth scope is required? Thank you in advance!

Hi, this video is quite educational. I have a doubt. Here it looks like you are using a single-ended probe/non-isolated probe. What if you have to use a differential probe and still you need to suppress noise pick up? I have used the Yokogawa differential probe and its loop area is significantly high. At least three times more than the single-ended probe.

Best video on youtube about these methods. Thanks

Excellent explanation. Thanks

It's unfortunate the audio is poor on this video.

A couple of questions. I extended the test point via a coax cable with a bnc connector and a small capacitor at the end. Is that Ok. Also should the input impedance of the scope be at 50 ohms or 1 mega ohm? I made a 5 volt Flyback smps and loading it with 5 amps. I figured with 50 ohm input you get rid of noise which is not part of the power supply. I noticed that some youtubers used this method. What do you think? thanks