40 Comments

april segura

January 30, 2020

Dear sir
I have a Philips pm 3200 0 – 10 MHz osiloscoop but i dont have the PROBES can you pls help me out with the chematic of the probes . Kinds regards

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Mohammed Jawad For Electronics and Physics

January 30, 2020

that sparrow make me mad 😒

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James skippinhopper

January 30, 2020

YEP!!!

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captain skeptical

January 30, 2020

eat your heart out tektronix :)))

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Thiago Lucas

January 30, 2020

How do ensure the protection of this probe? Is it electrically isolated from the high voltage side? Or your oscilloscope takes care of it with possible internal optocoupler? Is it possible to use this voltage probe with arduino? If yes, do I have to use an isolated component to separate the high voltage side from the low voltage side?

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Matthias H.

January 30, 2020

Thank you very much for this video

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c muller

January 30, 2020

I just found that old video and immediately recognized the voice. Hey it's the microphone guy!

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Laharl Krichevskoy

January 30, 2020

Just checking my Favorites list, saw this one down the bottom of the list. Salutations from the year 2018.

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Greg Feneis

January 30, 2020

Whoa, Dave. This one's pretty old.

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Jean Pierre Daviau

January 30, 2020

1 Meg resistor in parallel with à 56k in parallel. For a 1:1000 reading

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Jean Pierre Daviau

January 30, 2020

We would have liked seeing it tested.

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Jean Pierre Daviau

January 30, 2020

The red cable is a high voltage cable? Does it have a ground wire?

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Gear Wrench87

January 30, 2020

what happens if you put two 10:1 attenuators in series? does it make it 20:1?

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RepairAllTV

January 30, 2020

????

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Alperen Akküncü

January 30, 2020

10 puff?

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Michael Nobibux

January 30, 2020

Cool,but good probes use coax with a resistive center conductor to reduce ringing when used with a high impedance scope input.A resistive conductor distributes the total resistance (usually around 100-200 ohms) over its length.A lumped (discrete) resistor on the end of a piece of regular coax will not noticeably reduce ringing.Also a hi-Z probe should be well shielded and then there is the 'high voltage' issue….

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LM

January 30, 2020

Great idea and all but, with all the respect, half of the speech I did not understand, could you tell me please what is that "tail wire" for? and how this unit is attached to the oscilloscope and the probe? I just got part of the description… Thanks in advance.

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08Ultrasonic

January 30, 2020

I'm interested by the cal factor. What does this represent exactly? Is it the ratio of input to output voltage?
I assume that you'll be attaching your probe to an oscilloscope, which will have 10-15pF capacitor and a 1M ohm resistor within that scope. It looks like you've omitted that out of your design, which also might be a reason why the cal factor alters at 200Hz.

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James skippinhopper

January 30, 2020

Yep

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WALLDORF ELECTRON_CO

January 30, 2020

My oscilloscope is a PC type that connects via USB. For testing your average low voltage signals and frequencies it works well and responds fast! However, I've built some "high" voltage DC power circuits and voltage doublers varying from 100VDC to 350VDC. I have a two-channel OWON VDS-1022 which says the maximum input voltage is 40Volts from what I can see.

So how could I test that? Could I modify the probe or use a resistor or two? I'm not talking KiloVolts here!

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IngenieroCristian

January 30, 2020

It's an excelente design, but I think the construción is not safe.

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TheCrazyStudent

January 30, 2020

Nice video. I guess it must be very important to properly clean away every little particle of grease, dirt and flux residues from the whole RC network before potting it in order to minimize the risk of arcing?

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jeanious2009

January 30, 2020

that looks freaking dangerous. I think I'll pay the quadzillion dollar probe and be safe. lol.

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DiyMech

January 30, 2020

So, with a known calibrated HV source and calibrated meter/scope, what's the accuracy ?

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Johan Sagaert

January 30, 2020

Hmmm, did you try it at 20KV ? I would prefer a long one without copper shield, and add an extra grounding crocko clip.

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Xiomara Cruz Rodríguez

January 30, 2020

Hi, what type of BNC connector you used?

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Kaledius

January 30, 2020

Hi, How do you measure a higher voltage, like 50kv that is very low frequency so we cant use the propes as antenna pickups..?

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Turncoat

January 30, 2020

flippin bird!!!!

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José Federico Ramos Ortega

January 30, 2020

Do you think it is safe to use these probes to check the voltage of windings of one SMPS?

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DarkLevis

January 30, 2020

I learn electric power engineering, which has a lot to do with high voltage and I really liked this!!

Wish they showed similar stuff in university too =/

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YummyMercury

January 30, 2020

"Half a quadzillion dollars"
I laughed at that!

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Drmanbearpig

January 30, 2020

I have a question about digital oscilloscopes. Do you know what bandwidth would be needed to measure the peak resonance of a coil rated around 3000kHz? I'm not sure if the bandwidth is actually the specifications of the frequency range it can detect, or if it is something else. If you have any direction I could go in trying to find the right oscilloscope, I would greatly appreciate it. Thanks

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Manuel Sanchez

January 30, 2020

How about a DIY 4-channel digital oscilloscope tutorial? 😛

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EEVblog

January 30, 2020

@henryjarias Thanks to Doug Ford of course!

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henryjarias

January 30, 2020

Hi, Dave. I'm a professor (eng.) in Venezuela. I've learned a lot of things from your EEVBlog. I got surprised to see this video about HV. Not every electronics engineer is an enthusiast of HV stuff…so, thanks for this rather informative video.

Henry

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gmcjetpilot

January 30, 2020

Dave how about a DIY Active Oscilloscope probe or a RF Probe? Please!

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doodoodood

January 30, 2020

This was an EXCELLENT video. More like this one pleaase!!!

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Ja Ro

January 30, 2020

@Vlakpage check digikey part: 445-2363-1-ND

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Jan Tichavský

January 30, 2020

Those small caps are 3kV rated? It doesn't look like that.

Recently I needed to get rid of the scope ground connection for measuring HVDC up to 1000V and current on the positive side. So I designed (a bit amateurish) universal analog isolator with current input, it should isolate 1500V minimum. It can measure from mV to kV with great linearity depending on the input resistors. But I didn't include those caps accross resistors, I should read more about them.

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Phil B

January 30, 2020

Nice video indeed Dave & Doug. Thanks for sharing & much appreciated.

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