I would have secured that coil to ensure that it goes straight up. 13 m launch makes that even more important, but I assume they've done that a lot and started at lower currents.
I know this is an old comment but that’s pretty impressive. If the aluminum was .8 kg that’s over 25% conversion of electrical energy into kinetic energy using an air core coil. And it wasn’t even optimized for maximum efficiency or recovering leftover magnetism.
I had to console my poor old Fluke 77 meter that was sitting next to me on the table while I watched this. At least his brother performed admirably in your test.
The maintainance man at my work attempted to check mains voltage into the building. He was inadvertantly on the primary side of the transformer (13.2 Kv). Needless to say his Fluke 87 multimeter left nothing but the handholds of the leads. It's a wonder he wasn't hurt with the arc flash explosion of the meter.
The CAT rating on meters is very important when working with high energy circuits. Simple reason is transients and such. Nothing worse than a flash accident due to your meter being sub standard. My high energy working meters are no less than CAT III 600v. My normal everyday bench and field meters are CAT IV 1000v and this is purely for safety reasons. Good movie.
NOOOOO, you can't fry an old fluke 70, thats like sticking your granddads fingers in a socket. you evil man, i still have my fluke 73 and it has served me faithfully for over 20 years, it never let me down and I still use it.
One thing, Having spent a great deal of time dealing with airflow, and heat dissipation. If you setup your cooling fans to pull, and place them at the top you should see an ENORMOUS increase in cooling. Just throwing that out there, only because I know most folks settle for the cooling them can have, rather than trying to perfect it. Hope it helps you out at some point. GREAT JOB btw!!!
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.
My old Fluke stopped working when it was accidentally exposed to about 20KV in an old style TV. However, I replaced one IC and it works like new except the AC voltage reads about 0.4 volts high.
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 had an instructor mention my use of zipties in my project as if he didn't know better. Nice setup there. I need some more MOTs.
9 ปีที่แล้ว +3
Just used this video in my 9th grade Physics class to demonstrate why it was a bad idea to get those Mastech, like the one at 6:14, to do lab work in electricity.
6:15, I had the exact same meter before I bit the bullet for a fluke. It disturbs me that it was the only one that blew up literally. Close shave, but of course I wouldn't have stuck it into the mains or anything.
That was fun but I wouldn't say that El Cheapo meters are bad because they couldn't handle 4Kv. I seriously doubt that the folks that buy $20 meters are going to even have access to 4Kv. But Hey I guess I will drop $1500 on a Gossen just in case I want to measure across a 4Kv line. Yea right
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.
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.
t=6:45 Looks like a green PTC just below the buzzer. Not on the voltage side or too slow? Blew apart because no screws? No screw remnant or break in the posts, so seems like unfair test.
well the amount of joules isn't as much relevant as the voltage is :D , and volts are defined in the categories, but yeah, the cheap meters aren't designed for it
i once blew the $10 meter and melt its probe tip when i accidentally probe the main in the current measurement. so no surprise that its case blew off at 4kv.
lol, I accidentally shorted 230V AC in some PSU with my Amprobe meter's lead while trying to discharge a capacitor to get one quick measurment. I must have timed it just in the 300V+ part of the waveform as the steel lead literally got melted and fused with some metal, it looked funny as the steel wrapped kinda around, also the spark was so huge that it totally ripped nearby capacitor xd it tripped my workshop's breaker, whole house breaker and the one outside lol. Kids, always check that you have unplugged everything twice before working on electronics, don't use your expensive stuff to short capacitors or basically anything and don't touch the mains with your bloody fingers xd
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 guess up to now I didn't believe the danger of these cheap meters, they could blow up in your hand. I was at Harbor tools the other day and if you bought something you got a fee DMM, but it's a very cheap one, it sells for $5.99.
Geez, I regularly use a cheap Radioshack pocket meter while working on switching supply and tube amp circuits. This gives me some thought next time I put 400V across one!
A bit worrying though, that EVEN quality-brand digital meters which measure up to 1000v will blow drastically when 4000v is applied. You wonder what the safety margin actually is, if it's actually 400% then not too bad, but the instant pyrotechnics at this voltage suggest the actual safety margin may be a lot less. I'm sure the old analog meters like the AVO wouldn't have nuked on a 4x overload. Might've bent the pointer wouldn't have suffered an insulation failure.
Phantasmotronogun if you hook a fluke up to 6kv mains, you will die. What cat 4 really means is that a super brief 6k transient but will self extinguish the arc by the time it's back down 600v without blowing the meter apart. If it is a typical super brief 6k transient it won't even break the meter as the front end will dissipate it. On a el chepo the 6k transient will begin an arc that will not quench as the voltage comes back down to 600, power will be massive over time and you will get 3rd degree burns as well as parts of the meter embedded in you.
The old analog meters are freaking firethrowers. Don’t overload them from high energy sources. They’ll send flames and a bunch of glass shards your way. And when you’re regaining your consciousness, they’ll set your lab on fire. I’m not joking very much here. The whole “things were sturdier back then” thing only goes so far. If you apply that “resoning” uncritically and have religious approach to T&M gear, you’ll suffer. Don’t do that. Those meters were neither designed nor tested to be safe or even withstand such overloads. They could deal with the energy limited ones due to the inherent thermal mass of their components, but once things start vaporizing and there’s an arc, it’s bad news. The insulation won’t need to withstand anything: it’ll evaporate. Good luck depending on solid insulation when it’s in vapor state :)
I think you need to stress test those $500 meters you had one episode... just to compare ;-) I am also curious how well protected ADSL routers are from high voltages such as lightning striking the phone pole outside my house.
well, this is a good way to test the safety of meters. if it doesn't explode during this test, it's a safe meter since you're probably not going to use it anywhere near the 6 kV of voltage of this thing.
Coco from Man or Astro-Man, at 4:47. Dead ringer. He used to wear helmets and goggles on stage, and do things like play the theremin (and light it on fire) and bust out a tesla coil to send giant sparks to the ceiling.
Great job. Too bad you didn't have those cheap $3 multimeters.. they typically explode with much more sparks. Our product safety lab does that to them all the time. Can't go wrong with a Fluke for safety.
If you don't know the difference between grams and joules you really shouldn't be planning to make any sort of high energy discharge system. You have to be able to calculate the properties to ensure proper safety margins, and your obvious carelessness indicates that it won't be possible for you to get the right answers. These things can kill you, if you have to ask how to build one you don't have the requisite knowledge to do it safely.
Interesting, I wonder why the coil jumped just after the aluminium block. Was the plastic housing compressed and rebounded or was there a magnetic attraction between it and the aluminium induced by... back EMF for example?
Daniel Edewaard It is a required compliance test (only higher!) A certain fraction of the meters produced shall be subjected to this test and not exceed specific levels of damage to the user, otherwise that entire production run gets a product safety recall.
something makes this video very visually choppy. I think it is the anti-vibration facility in the camera, which I presume is enabled. When normal shake or even panning occurs, the camera compensates, keeping the image absolutely still, up till its limit, then the image "jumps" with no blur to a new position. Unfortunately "normal" hand shake seems just past its limit and the result is rapid jolting between random new positions. Maybe it's just me, or it's the compression.
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.
Seems like a waste of some good DVM's at least the Fluke meters. It does show the build quality of the Fluke meter, it's not just a fluke that they are built that way. I don't like magic smoke, there is nothing magical about it. When the smoke comes I get upset, because I know that one of my components has failed and I have to do more work.
![[LIVE] : ONE ลุมพินี 85 | คู่เอก "ยอดเหล็กเพชร vs ผึ้งหลวง"](http://i.ytimg.com/vi/Qq_19bnnxEo/mqdefault.jpg)
Top-3 strongest materials on Earth:
3. Steel
2. Titanum
1. Decimal point
Just for giggles, I calculated the height the aluminum block reached based on its airtime. It was airborne for ~3.3 seconds so it went ~13m high.
I would have secured that coil to ensure that it goes straight up. 13 m launch makes that even more important, but I assume they've done that a lot and started at lower currents.
I know this is an old comment but that’s pretty impressive. If the aluminum was .8 kg that’s over 25% conversion of electrical energy into kinetic energy using an air core coil.
And it wasn’t even optimized for maximum efficiency or recovering leftover magnetism.
I had to console my poor old Fluke 77 meter that was sitting next to me on the table while I watched this. At least his brother performed admirably in your test.
The maintainance man at my work attempted to check mains voltage into the building. He was inadvertantly on the primary side of the transformer (13.2 Kv). Needless to say his Fluke 87 multimeter left nothing but the handholds of the leads. It's a wonder he wasn't hurt with the arc flash explosion of the meter.
The CAT rating on meters is very important when working with high energy circuits. Simple reason is transients and such. Nothing worse than a flash accident due to your meter being sub standard. My high energy working meters are no less than CAT III 600v. My normal everyday bench and field meters are CAT IV 1000v and this is purely for safety reasons. Good movie.
Doug is cool!
The wiring job on that huge power supply was just awesome!
@FoamPackingPeanuts
You can see the dials, they were all set for DC volts. So the current range fuses did not play a part.
good old 300fps in 2010
NOOOOO, you can't fry an old fluke 70, thats like sticking your granddads fingers in a socket. you evil man, i still have my fluke 73 and it has served me faithfully for over 20 years, it never let me down and I still use it.
Poor African children could have eaten those multimeters.
Send them yours...
One thing, Having spent a great deal of time dealing with airflow, and heat dissipation. If you setup your cooling fans to pull, and place them at the top you should see an ENORMOUS increase in cooling. Just throwing that out there, only because I know most folks settle for the cooling them can have, rather than trying to perfect it. Hope it helps you out at some point. GREAT JOB btw!!!
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.
The Fluke 70 series was still going through the segment check after four shocks. That's proof of the safety and quality of Fluke multimeters.
The last Fluke also blew the top of component U12 above the selector switch. You can see the die through the hole. Nasty.
Finally someone noticed it!
Yea that one is fucked. 4000v trough U12 lol. RIP U12.
My old Fluke stopped working when it was accidentally exposed to about 20KV in an old style TV. However, I replaced one IC and it works like new except the AC voltage reads about 0.4 volts high.
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 had an instructor mention my use of zipties in my project as if he didn't know better. Nice setup there. I need some more MOTs.
Just used this video in my 9th grade Physics class to demonstrate why it was a bad idea to get those Mastech, like the one at 6:14, to do lab work in electricity.
They may be pretty crap, but one of those $20 (USD at least) meters has saved my bacon a few times.
I could have cried watching you blow up those perfectly good Fluke meters...
Perfectly good? One was drop tested and had a loose power resistor, and the other one was old.
Prehistoricman old dosnt mean bad.
@ubuntututorials
Yes, such low cost meters are good enough for general use. And you are wise not to use it on the mains or other high energy gear.
That was a pretty awesome test. I have heard and known of technicians being severely injured from improper meter use, even with the good ones.
Some Brymen model meters are CAT IV to 1000v on their voltage/ohms inputs. Obviously not on the current inputs.
Dave, have you considered teaming up with Doug again to destroy more multimeters? A modern remake of this would be awesome.
6:15, I had the exact same meter before I bit the bullet for a fluke.
It disturbs me that it was the only one that blew up literally. Close shave, but of course I wouldn't have stuck it into the mains or anything.
That was fun but I wouldn't say that El Cheapo meters are bad because they couldn't handle 4Kv. I seriously doubt that the folks that buy $20 meters are going to even have access to 4Kv.
But Hey I guess I will drop $1500 on a Gossen just in case I want to measure across a 4Kv line. Yea right
Joseph Murphy It’s old news, but the Gossens that I’ve seen are crap. Not worth it at all. Well done poor engineering.
High voltage scares the F out of me.
SoCalFreelance dont be scared just respect electricity
marionetadelplaneta Guess I've seen too many horrific accidental electrocution videos on LiveLeak
SoCalFreelance
not knowing waht u r up to + playing around = high death risk against anything dangerous
SoCalFreelance Seriously? That Flies on top of multimeter Didn't give a shi*t about high voltage 8:05 what a thug life
just don't touch it with your bloody fingers and you will be okay xd
Amazing advice for Extra Low Voltage use. Thumbs up.
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. ;-)
6:56 I used to be a fuse like you, but then i took 4KV in the knee.
Why did this appear in my recommended 10 years after it was produced? Prett..... oh capacitors, this is gonna be good. Not disappointed!! :)
Shout out to Doug, good to see you're still as mad as ever, mate.
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.
Holy Crap! no wonder the poles are shifting ;-)
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.
t=6:45 Looks like a green PTC just below the buzzer. Not on the voltage side or too slow? Blew apart because no screws? No screw remnant or break in the posts, so seems like unfair test.
The sound of those clicks sound like a firing squad, shooting down multimeters.
"my mate Doug" is the most Aussie phrase
I just hate it when I get 400J surge in my multimeter...
Thanks! You just remembered to my childhood. I used to do this when I was a child.
We definitely need more of these tests :) Show us other beatiful equipment like this Monopulser, please
Congratulations to your 100th video Dave.
lol, i love how he says "They're not designed to handle those surges" like it would be a matter of course to design a cheap meter to handle 400J. :D
well the amount of joules isn't as much relevant as the voltage is :D , and volts are defined in the categories, but yeah, the cheap meters aren't designed for it
I bet the people working at UL love to work there for that exact reason.
I'd love to see any multimeter survive this..
@raazstone
The Fluke 87V
But without knowing your requirements, that answer may be pointless.
The good old days of the eevblog how is Doug Dave? Hope to see him back on soon.
i once blew the $10 meter and melt its probe tip when i accidentally probe the main in the current measurement. so no surprise that its case blew off at 4kv.
lol, I accidentally shorted 230V AC in some PSU with my Amprobe meter's lead while trying to discharge a capacitor to get one quick measurment. I must have timed it just in the 300V+ part of the waveform as the steel lead literally got melted and fused with some metal, it looked funny as the steel wrapped kinda around, also the spark was so huge that it totally ripped nearby capacitor xd it tripped my workshop's breaker, whole house breaker and the one outside lol. Kids, always check that you have unplugged everything twice before working on electronics, don't use your expensive stuff to short capacitors or basically anything and don't touch the mains with your bloody fingers xd
Premature fire, blew the knob off!
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 guess up to now I didn't believe the danger of these cheap meters, they could blow up in your hand. I was at Harbor tools the other day and if you bought something you got a fee DMM, but it's a very cheap one, it sells for $5.99.
I kinda liked that old fluke showed still live in lcd screen even with multiple jolts xD
7:31 "Smell like... Victory"
(с) Apocalypse Now
Love the stress-test videos.
Boom! Personally, loved the meter tests. Would've loved to see the big daddy rip a few apart!
I believe that decimal point (6:33) is actually PAINTED on the screen. It'll display even with no power.
Great Video Guys. Keep up the great work. Nick.
My multimeter (VICHY VC97) Naturally destroyed two days ago, after only 3 months. Came here trying to find a review on it.
"it blew the knob off"
oh man.. them ausies be crazy
As a beginner electronics enthusiast, I would have loved those meters :/.... Oh well, almost 60,000 people got something out of it. Great video
"I love the smell of electronics in the morning !" 😂
Geez, I regularly use a cheap Radioshack pocket meter while working on switching supply and tube amp circuits. This gives me some thought next time I put 400V across one!
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?
A bit worrying though, that EVEN quality-brand digital meters which measure up to 1000v will blow drastically when 4000v is applied. You wonder what the safety margin actually is, if it's actually 400% then not too bad, but the instant pyrotechnics at this voltage suggest the actual safety margin may be a lot less.
I'm sure the old analog meters like the AVO wouldn't have nuked on a 4x overload. Might've bent the pointer wouldn't have suffered an insulation failure.
Phantasmotronogun if you hook a fluke up to 6kv mains, you will die. What cat 4 really means is that a super brief 6k transient but will self extinguish the arc by the time it's back down 600v without blowing the meter apart. If it is a typical super brief 6k transient it won't even break the meter as the front end will dissipate it. On a el chepo the 6k transient will begin an arc that will not quench as the voltage comes back down to 600, power will be massive over time and you will get 3rd degree burns as well as parts of the meter embedded in you.
The old analog meters are freaking firethrowers. Don’t overload them from high energy sources. They’ll send flames and a bunch of glass shards your way. And when you’re regaining your consciousness, they’ll set your lab on fire. I’m not joking very much here. The whole “things were sturdier back then” thing only goes so far. If you apply that “resoning” uncritically and have religious approach to T&M gear, you’ll suffer. Don’t do that. Those meters were neither designed nor tested to be safe or even withstand such overloads. They could deal with the energy limited ones due to the inherent thermal mass of their components, but once things start vaporizing and there’s an arc, it’s bad news. The insulation won’t need to withstand anything: it’ll evaporate. Good luck depending on solid insulation when it’s in vapor state :)
I think you need to stress test those $500 meters you had one episode... just to compare ;-)
I am also curious how well protected ADSL routers are from high voltages such as lightning striking the phone pole outside my house.
Boys and their toys. :D I loved the multimeter executions. I almost felt bad for them.
well, this is a good way to test the safety of meters. if it doesn't explode during this test, it's a safe meter since you're probably not going to use it anywhere near the 6 kV of voltage of this thing.
Coco from Man or Astro-Man, at 4:47. Dead ringer. He used to wear helmets and goggles on stage, and do things like play the theremin (and light it on fire) and bust out a tesla coil to send giant sparks to the ceiling.
That was a very cool video Dave!
@philpem
Google "Caution: Dangerous Multimeters"
Great job. Too bad you didn't have those cheap $3 multimeters.. they typically explode with much more sparks. Our product safety lab does that to them all the time. Can't go wrong with a Fluke for safety.
If you don't know the difference between grams and joules you really shouldn't be planning to make any sort of high energy discharge system. You have to be able to calculate the properties to ensure proper safety margins, and your obvious carelessness indicates that it won't be possible for you to get the right answers. These things can kill you, if you have to ask how to build one you don't have the requisite knowledge to do it safely.
best electronic video ever! i love his videos
Interesting, I wonder why the coil jumped just after the aluminium block. Was the plastic housing compressed and rebounded or was there a magnetic attraction between it and the aluminium induced by... back EMF for example?
strong photonicinduction vibes only with less carpet.
Try your Fluke industrial multimeters and see what happen to your bank account.
Capacitor banks a heaps of fun :)
You should have put at least one of the cheap ones on amps so we could have seen how bad the glass fuses really are.
Its no photonic induction, but still entertaining.
@s12pendler
Thanks.
It's not my 100th Blog yet though!
Good thing that isn't a required QC test before shipping or there would be a serious shortage of multimeter's in the world!
Daniel Edewaard It is a required compliance test (only higher!) A certain fraction of the meters produced shall be subjected to this test and not exceed specific levels of damage to the user, otherwise that entire production run gets a product safety recall.
11:39 that chip on the right looks like it has a gaping hole in it.
i like on how the fluke sure the button blew off but after eash shock it still worked :P
"This is Doug and he likes to blow shit up!"
I have the same model as the second one you blew up. At least I know it can make a good bomb if I need it to be.
Would like to see more stuff like this!
Hello future & past me, still would like to see more stuff with Doug :)
And I'm back again in 2021 after the Fluke repair video linked back here
Do some repair videos fixing some of these
11:22 those MOVs have been completely obliterated, they've actually split in half
something makes this video very visually choppy.
I think it is the anti-vibration facility in the camera, which I presume is enabled.
When normal shake or even panning occurs, the camera compensates, keeping the image absolutely still, up till its limit, then the image "jumps" with no blur to a new position.
Unfortunately "normal" hand shake seems just past its limit and the result is rapid jolting between random new positions.
Maybe it's just me, or it's the compression.
Why not try Doug's pulse tester on an electric kettle ? See how quick it can boil a kettle ?
Kinda wish Dave would return to doing videos like this.
Can this machine take you back in time?
Kenny Advocat only forward, to the end of life...
Alex hvanicedaymthfkr That's deep..
=)
Kenny Advocat It can take you back to non-existence!
+Kenny Advocat it will take you back to when the electric chair was invented
@dc100GHz
Yeah, it got listed on Hack-a-Day and Hacked Gadets.
I was hoping to make BoingBoing again but it didn't happen :-(
Great show. I'm thinking Rail Gun or EMP anti-cell phone device.
"There will be silence in this movie theatre." ZAP!
Please show more such tests!
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.
Gotta love a bit of Terrible Fire(tm)
Seems like a waste of some good DVM's at least the Fluke meters. It does show the build quality of the Fluke meter, it's not just a fluke that they are built that way. I don't like magic smoke, there is nothing magical about it. When the smoke comes I get upset, because I know that one of my components has failed and I have to do more work.
THis video got my on the floor rolling. It sounds like its getting shot up with out the bullets LOL.