Let's destroy some multimeters and shoot some metal with Doug's high energy 4KV capacitor discharge unit.

Visit Doug at www.dfad.com.au

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By YTB

26 thoughts on “Eevblog #84 – high energy multimeter destruction”
  1. Avataaar/Circle Created with python_avatars xONEWINGx says:

    4KV at 5uF? does that sound right? Cap values aren't given in vid.

  2. Avataaar/Circle Created with python_avatars Shane Johns says:

    Supposedly, an EMP will mostly affect electronic devices if they have power running through them when the EMP happens. I see that the multimeter is turned on for this 'test'. Is there anything that can protect against this in circuit design? What if there was a fuse along every trace between every component inside? I know that'd make it unbearably large and is unfeasible for that reason. But would that even help stop/isolate this effect? It'd happen on the inside of the chips/ICs too, wouldn't it?

  3. Avataaar/Circle Created with python_avatars Shane Johns says:

    I already have a bit of a phobia when it comes to electricity. I'll flip a breaker, but still too 'chicken' to take off the panel and even switch out a bad breaker.
    This video set me back about two decades worth of progress trying to overcome that phobia.

  4. Avataaar/Circle Created with python_avatars Sauvik Roy says:

    I like Doug! ☺️

  5. Avataaar/Circle Created with python_avatars Silver Legend says:

    I cannot agree with Dave's comment about not using cheap meters. Provided that one recognises the limitations of cheap meters, avoiding using them in high voltage/high-energy situations and being aware of their potential errors, a cheap meter is adequate for many day-to-days tasks and should one be unlucky/careless/stupid enough to drop it, lose it, lend it and not get it back, drive the car over it or otherwise wreck it not a great deal of damage is done to one's wallet. I have several £5 to £15 meters dotted about the workshop and garage, a luxury I could not indulge in with Fluke meters, although I do have two of that brand.

  6. Avataaar/Circle Created with python_avatars Joe R says:

    Omg I soooo would want that one multimeter that blew appart n the decimal still works. Lol I'd put that on the wall and make decor outta it!

  7. Avataaar/Circle Created with python_avatars George LaReese says:

    It sounds like some one back side is geting hit .

  8. Avataaar/Circle Created with python_avatars a smol bean says:

    "my mate Doug" is the most Aussie phrase

  9. Avataaar/Circle Created with python_avatars Jason Day says:

    My initial thought about a flyback capacitor was that you'd charge it up, then hold a metal rod, touch the flyback capacitor with the said rod, and then fly back.

  10. Avataaar/Circle Created with python_avatars Sionyn Jones says:

    The good old days of the eevblog how is Doug Dave? Hope to see him back on soon.

  11. Avataaar/Circle Created with python_avatars Damien Clark says:

    Wanna see the gossen metrahit energy go through this test

  12. Avataaar/Circle Created with python_avatars arabquarter says:

    You can now replace a lot of those glass fuses with the correct SIBA FF Ceramic Fuses that will handle up to 600 Volts in the 10 Amps if you only have a 6 mm x 30 mm fuse and 1000 Volts in the 500 ma using the same 6 mm x 30 mm fuse. Klein Tools 69033 FUSE 5 mm x 20 mm 500MA 600V, this is a ceramic fuse with more than likely sand filled inside. This will help get your meter closer to being the proper cat II and proper cat III rating without having to pay a lot.

  13. Avataaar/Circle Created with python_avatars Colaholiker says:

    Seeing how crazy those Aussies are, I'm glad to know that they are literally as far away as they can be while still being on the same planet. 😉

  14. Avataaar/Circle Created with python_avatars Etch says:

    strong photonicinduction vibes only with less carpet.

  15. Avataaar/Circle Created with python_avatars SuperMan Returns says:

    your mate is a little waco or guess ?

  16. Avataaar/Circle Created with python_avatars Phaedra says:

    Is there a significant user risk with cheapo meters used on household 240V? All of the damage in the video was contained in the meter, so when they arc or burn inside is there a real user risk or is it primarily a fire risk if they are left connected for too long? i.e. Are there significant user safety problems with no input protection or is it primarily protecting your investment in the meter?
    [Even though at most I will measure household 240V, I chose a $20 UNI-T UT890C because it has 3 PTCs, a diode bridge and larger fuses than, say, a $10 ZOYI ZT102 that only has 1 PTC and tiny fuses. The UT890C also has larger shunt, traces and pcb isolation slots. Is it really safer for the user or not actually an issue? ]

  17. Avataaar/Circle Created with python_avatars Steve Tobias says:

    Would I be right in assuming that the fuses in most of those did not blow because they were in volt mode and not in amp mode?

  18. Avataaar/Circle Created with python_avatars dash8brj says:

    Why did this appear in my recommended 10 years after it was produced? Prett….. oh capacitors, this is gonna be good. Not disappointed!! 🙂

  19. Avataaar/Circle Created with python_avatars uK8cvPAq says:

    Time for a remake with newer models?

  20. Avataaar/Circle Created with python_avatars Jerry Ericsson says:

    I may be safe, well sort of, all I usually deal with is arduino voltages, and perhaps 12 volts in my RV. It is rare indeed when I delve into the 120 volt items, however recently I have developed an interest in old radio receivers. Thus far I have not jumped into the old valve sets but if the chance were presented, I believe I would check some of them out. When I was a young fellow, probably 8 or 9 years old, we moved to our first house with electric power. Dad bought us a used floor model radio, it had shortwave, and POLICE! Now we were living on a farm in the midst of some very tall butte's so the chance of getting much on Shortwave was probably very low, especially when there were no antenna's hooked to the set, but I was determined to get it working. So whilst mom and dad were out in the barn milking cows, I turned on that old radio, and turned the switch to SW. Nothing really happened no matter how much I twisted the knobs and pushed the buttons, so I reached around to the back side of the radio and stuck my hand inside to try and make a button pop out after getting it stuck. There was, in my mind, a crash of thunder, my muscles all went tight, and my little body seemed to fly across the room and bounce off the wall. To this day, I don't know what the hell I made contact with, probably the B+ or perhaps it was just the 120 volts, but I had a hell of a burn on my finger and a knot on my head that looked like a goose egg. I never told dad what I had done, or I would not have been able to sit for a week as well, one day I did mention it to mom as she was looking at that lump on my head and bandaging the burn on my finger, she said she would not tell dad either. I did learn not to stick my hand in the back of a radio. Valuable lesson I guess. Still I would love to have that old radio back.

  21. Avataaar/Circle Created with python_avatars Ivan4es1 says:

    Neat, I want this discharger for dot welder to welding li-ion batteries.)

  22. Avataaar/Circle Created with python_avatars toyyou2jp says:

    Try your Fluke industrial multimeters and see what happen to your bank account.

  23. Avataaar/Circle Created with python_avatars Kaldena Genie D says:

    Crazy and funny uncle))

  24. Avataaar/Circle Created with python_avatars Robin Sattahip says:

    Just don't hold your cheap meter and they're safe enough.

  25. Avataaar/Circle Created with python_avatars Erdem K. says:

    burnt epoxy pcb not smell good

  26. Avataaar/Circle Created with python_avatars Apple Trump says:

    “And he likes to blow sh!t up”
    Now that’s my type of person

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