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?
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.
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.
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.
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.
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? ]
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.
4KV at 5uF? does that sound right? Cap values aren't given in vid.
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?
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.
I like Doug! ☺️
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.
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!
It sounds like some one back side is geting hit .
"my mate Doug" is the most Aussie phrase
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.
The good old days of the eevblog how is Doug Dave? Hope to see him back on soon.
Wanna see the gossen metrahit energy go through this test
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.
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. 😉
strong photonicinduction vibes only with less carpet.
your mate is a little waco or guess ?
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? ]
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?
Why did this appear in my recommended 10 years after it was produced? Prett….. oh capacitors, this is gonna be good. Not disappointed!! 🙂
Time for a remake with newer models?
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.
Neat, I want this discharger for dot welder to welding li-ion batteries.)
Try your Fluke industrial multimeters and see what happen to your bank account.
Crazy and funny uncle))
Just don't hold your cheap meter and they're safe enough.
burnt epoxy pcb not smell good
“And he likes to blow sh!t up”
Now that’s my type of person