Feb 11, 2019 2:55 AM
enigma439
266299
3058
46
electrician
awesome
circuits
neat
IAMSRC
My fault finder and I broke up a month ago.
KingKolunikus
Not sure if downvote for pointless music or upvote because I happen to like this particular piece of pointless music.
DavidECloveast
I'll be honest, I think you could have found the break in the circuit without it
causationn
I'd be interested in seeing it work with a proper plug, and if a machine we're turned on.
twfeline
We are turned on, too.
yuyufan43
That music though
Tanhis
HSE annoucement: Do not use this to detect is the current off. Only to detect is current live or cable faults.
StillNotYouTube
ok so how do I detect if the current is off? Because that's pretty much what I use it for.
dietderpsy
I need this for my relationship.
bubblebreathdragon
Won't work on DC voltage. Needs AC voltage to induce current on the measuring device.
RedWarBlade
This is not magnetic induction. there is no current on that broken wire
(a) Nobody said this was magnetic. The AC voltage is making your electric field. (B) Nobody is disputing the example shown. Just won't do DC
fskn
kaarbaak1337
The big gap in the wire wasn't a clue?
ProVallone
Neat
CapnJack804
Put it in a plastic housing, paint "Fluke" on it, and charge me $200
ki4clz
volt tick
Ricothorton
If you did this in Australia and you weren't an electrician, you would be arrested
dankenmutt
looks around, hey guys, there's only 1 wire com8ng out of that socket... what happened to the rest of the circuit?
TheTrueBoxBoy
BitchButcher
You took the most funny scene of the whole series and made a fucking imgur upvote gif out of it? Shame! Shame!
I didnt. Imgur did. I just used it :D
Scipio1770
Is it just an inductor? I'm guessing it won't work for well shielded cables.
thoushaltnotpass
Or DC voltage
Gotbread
Think of it more as a e-field pickup antenna.
namAehT
Or against neutral.
MikkenKarstark9000
Not a problem when you are working on an IT system...
jedderrick
Like the Swiss?
smartguy1196
Shielding only attenuates flux. Theoretically, you could do this for any cable.
arednecksquirel
Won't work on DC, no change in Flux is no induced current to power the LED
Xeddius
Unless it's pulsed DC, which does change slightly.
loyboys215
Nuclearun
Downvote for completely unrelated and unnecessary sound/music at 10,000db.
badabingdingdong
Why oh why do they keep adding inane music to gifs. Go back to facebook with that shit.
Mute, all day every day
Elusivehawk
I didn't need to know it had music.
I thinkn the background music to this video is a perfect metapher of why I hate the majority of people and especially young ones.
insufficientimagination
well that reminded me to turn the sound off
wylwrk
a foreign volt meter? uhhhh....
GroundscorePro
Small bottle rocket
DutchCraft2050
I dont need one for that fault :)
Chpgmr
one of those dead christmas lights sensor things.
5P1D3Rr
Would it really work for that though? The wire would still have power of the bulb is bad.
Sometimes a bad bulb or damaged socket knocks out the whole line on my tree.
PianoMan2112
...I never thought of using it for that!
chinablue
Do people still buy series instead of parallel christmas lights?
Mine are a terrible parallel design
BURNtheZEPPELIN
Yeah, that's what they use on stranger things isn't it?
captnspanksalot
a.k.a "chicken stick"
You can buy completed enclosef product for under 10€£$. But if you want to make it yourself then carry on.
rodeo1488
Sauce then?
https://m.motonet.fi/fi/tuote/385279/Jannitteen-koetin-5-600V from Finland but still valid for price range
Amazon has a lot of non-contact voltage testers for around $20. I like the Fluke one, but they're probably all made by the same company.
https://www.amazon.com/gp/aw/d/B01DFN42VG/ref=sspa_mw_detail_3?ie=UTF8&psc=1
Doridan
McSnarkypants
Glad you did that, it was damned hard to get the bugger on the right frame
daminimoose
So why are three transistor necessary?
DoctorUnicorn
I'd guess it's acting as a current divider to protect the LED from burning, but that's just a guess.
CausticCake
Each transistor has current gain. 3 stages amplifies the feeble inductor current by almost 1 million
PetitChocolat
v
I forget, but doesn't the output rely more on the drain than the gate for n-types? Doesn't the gate just have to overcome threshold?
chargeling
Either way, this doesn't seem like a smart design…
SaturnineCult
If it's cheap and works with only few common discreet parts, why is it stupid design then?
splungedude
That depends on the type of transistor, some open all the way at a set voltage, others open and close further depending on that voltage
ZiomalZParafii
In bipolar transistors Ic (current of collector) = β*Ib (gain multiplied by base current). Typical β =~ 100.
JeffreyBarter
In THIS case it is clear that it depends only on the base.
sybren
There are no drain and gate, there's collector and base. These are BJTs, you're thinking of MOSFETs.
verinoth
So it's a non contact voltage detector?
Templeofpoon
Nnnnnnyes
PwnageHobo
a.k.a volt stick
C0M8A5
Wimp Stick
MrRgrs
It senses electric fields I think. Like an antenna but you don't need to interpret the signal. Been a while, I could be wrong...
DoNotTakeSeriousPls
Since it’s effective range is about a millimeter I think it still falls under contact voltage detector
Weekendatberniesanders2020
You arent contacting the conductor. So you can see if wires are dead. So its noncontact.
Yea, but still
Namotatop
If we're really being picky then technically speaking either everything is noncontact or nothing is.
ChristopherTallant
Yup. Remember when we would go to Radio Shack and buy the parts to make these ourselves?
Gayforbae
Now you just go to mouser, octopart, or digikey
VigorousButtstuff
Ahh, Radio Shack. The perfect example why a leather company shouldn't try to make overpriced computers.
Slorpthegillman
Waaait... Tandy was the same Tandy?!!!
Yep. The Current Tandy is actually "The Leather Experts". They bought the name and leather business when old-Tandy went full time into RS.
Rovylern
I ‘member.
shmekie
No
chapitaine
pepperidge farm remember
Ahhh radio shack. Bankruptcy brother of fellow fossil Blockbuster
Finduses
Blockbuster still exists, it is a danish online rental for movies now
perkocetts
That's exactly what it is. It's a fairly simple concept, but really neat to make one.
WinningNYC
Dot
hippybobby
Daht
SkycladNightStroller
Dawt
It's a simple spell but quite unbreakable.
alRakoun
It detects small changing magnetic fields. The changing B-field comes from the AC mains charging and discharging the severed wire.
Even though the wire doesn't form a circuit in space, it has a reactance and stores and releases a very small amount of energy each AC cycle
So in effect, it forms a circuit in time
LucentSable
In effect it's an antenna. Not a very good antenna, but still an antenna
ThisIsJustMySecondNSFWAccountMoveAlongOrPMmeIDontCare
AC voltage detector* this thing isn't going to do anything for DC
MoepsDump
I mean most power networks use AC anyway...
Jarwren
Well you could spin it really fast to detect DC voltages... :D
AaronOnTheRocks
Can I expect be made for DC?
WardSharlow
It could detect a functioning DC circuit. The intensity of the M field is a function of current.
AJMansfield
This functions via capacitive coupling from the probe tip, not m-field interactions.
ChronoKing
with a steady current, it will "blip" at best. You need flux.
You know what? I just remembered my Faraday and his problem with input/output symmetry in coils. You are correct.
You'd have to move the coil back and forth like a metal detector.
todayok
There is no current in the video. The wire is plugged in but no load.
MrHandsOn
Try this at home and grab or touch that bare spot and see what happens.
There's a small changing B-field due to parasitic current from the reactance in the attached wire.
derju
Technically the wires act as capacitors and therefore a very small current is always flowing
justmovealong
You're right, people love to downvote tho.
Bytencoder
But that would qualify as AC. And the whole thing is a transmission line?
IAMSRC
My fault finder and I broke up a month ago.
KingKolunikus
Not sure if downvote for pointless music or upvote because I happen to like this particular piece of pointless music.
DavidECloveast
I'll be honest, I think you could have found the break in the circuit without it
causationn
I'd be interested in seeing it work with a proper plug, and if a machine we're turned on.
twfeline
We are turned on, too.
yuyufan43
That music though
Tanhis
HSE annoucement: Do not use this to detect is the current off. Only to detect is current live or cable faults.
StillNotYouTube
ok so how do I detect if the current is off? Because that's pretty much what I use it for.
dietderpsy
I need this for my relationship.
bubblebreathdragon
Won't work on DC voltage. Needs AC voltage to induce current on the measuring device.
RedWarBlade
This is not magnetic induction. there is no current on that broken wire
bubblebreathdragon
(a) Nobody said this was magnetic. The AC voltage is making your electric field. (B) Nobody is disputing the example shown. Just won't do DC
fskn
kaarbaak1337
The big gap in the wire wasn't a clue?
ProVallone
Neat
CapnJack804
Put it in a plastic housing, paint "Fluke" on it, and charge me $200
ki4clz
volt tick
Ricothorton
If you did this in Australia and you weren't an electrician, you would be arrested
dankenmutt
looks around, hey guys, there's only 1 wire com8ng out of that socket... what happened to the rest of the circuit?
TheTrueBoxBoy
BitchButcher
You took the most funny scene of the whole series and made a fucking imgur upvote gif out of it? Shame! Shame!
TheTrueBoxBoy
I didnt. Imgur did. I just used it :D
Scipio1770
Is it just an inductor? I'm guessing it won't work for well shielded cables.
thoushaltnotpass
Or DC voltage
Gotbread
Think of it more as a e-field pickup antenna.
namAehT
Or against neutral.
MikkenKarstark9000
Not a problem when you are working on an IT system...
jedderrick
Like the Swiss?
smartguy1196
Shielding only attenuates flux. Theoretically, you could do this for any cable.
arednecksquirel
Won't work on DC, no change in Flux is no induced current to power the LED
Xeddius
Unless it's pulsed DC, which does change slightly.
loyboys215
Nuclearun
Downvote for completely unrelated and unnecessary sound/music at 10,000db.
badabingdingdong
Why oh why do they keep adding inane music to gifs. Go back to facebook with that shit.
RedWarBlade
Mute, all day every day
Elusivehawk
I didn't need to know it had music.
BitchButcher
I thinkn the background music to this video is a perfect metapher of why I hate the majority of people and especially young ones.
insufficientimagination
well that reminded me to turn the sound off
wylwrk
a foreign volt meter? uhhhh....
GroundscorePro
Small bottle rocket
DutchCraft2050
I dont need one for that fault :)
Chpgmr
one of those dead christmas lights sensor things.
5P1D3Rr
Would it really work for that though? The wire would still have power of the bulb is bad.
Chpgmr
Sometimes a bad bulb or damaged socket knocks out the whole line on my tree.
PianoMan2112
...I never thought of using it for that!
chinablue
Do people still buy series instead of parallel christmas lights?
Chpgmr
Mine are a terrible parallel design
BURNtheZEPPELIN
Yeah, that's what they use on stranger things isn't it?
captnspanksalot
a.k.a "chicken stick"
Tanhis
You can buy completed enclosef product for under 10€£$. But if you want to make it yourself then carry on.
rodeo1488
Sauce then?
Tanhis
https://m.motonet.fi/fi/tuote/385279/Jannitteen-koetin-5-600V from Finland but still valid for price range
StillNotYouTube
Amazon has a lot of non-contact voltage testers for around $20. I like the Fluke one, but they're probably all made by the same company.
Tanhis
https://www.amazon.com/gp/aw/d/B01DFN42VG/ref=sspa_mw_detail_3?ie=UTF8&psc=1
Doridan
McSnarkypants
Glad you did that, it was damned hard to get the bugger on the right frame
daminimoose
So why are three transistor necessary?
DoctorUnicorn
I'd guess it's acting as a current divider to protect the LED from burning, but that's just a guess.
CausticCake
Each transistor has current gain. 3 stages amplifies the feeble inductor current by almost 1 million
PetitChocolat
daminimoose
I forget, but doesn't the output rely more on the drain than the gate for n-types? Doesn't the gate just have to overcome threshold?
chargeling
Either way, this doesn't seem like a smart design…
SaturnineCult
If it's cheap and works with only few common discreet parts, why is it stupid design then?
splungedude
That depends on the type of transistor, some open all the way at a set voltage, others open and close further depending on that voltage
ZiomalZParafii
In bipolar transistors Ic (current of collector) = β*Ib (gain multiplied by base current). Typical β =~ 100.
JeffreyBarter
In THIS case it is clear that it depends only on the base.
sybren
There are no drain and gate, there's collector and base. These are BJTs, you're thinking of MOSFETs.
verinoth
So it's a non contact voltage detector?
Templeofpoon
Nnnnnnyes
PwnageHobo
a.k.a volt stick
C0M8A5
Wimp Stick
MrRgrs
It senses electric fields I think. Like an antenna but you don't need to interpret the signal. Been a while, I could be wrong...
DoNotTakeSeriousPls
Since it’s effective range is about a millimeter I think it still falls under contact voltage detector
Weekendatberniesanders2020
You arent contacting the conductor. So you can see if wires are dead. So its noncontact.
DoNotTakeSeriousPls
Yea, but still
Namotatop
If we're really being picky then technically speaking either everything is noncontact or nothing is.
ChristopherTallant
Yup. Remember when we would go to Radio Shack and buy the parts to make these ourselves?
Gayforbae
Now you just go to mouser, octopart, or digikey
VigorousButtstuff
Ahh, Radio Shack. The perfect example why a leather company shouldn't try to make overpriced computers.
Slorpthegillman
Waaait... Tandy was the same Tandy?!!!
VigorousButtstuff
Yep. The Current Tandy is actually "The Leather Experts". They bought the name and leather business when old-Tandy went full time into RS.
Rovylern
I ‘member.
shmekie
No
chapitaine
pepperidge farm remember
DoNotTakeSeriousPls
Ahhh radio shack. Bankruptcy brother of fellow fossil Blockbuster
Finduses
Blockbuster still exists, it is a danish online rental for movies now
perkocetts
That's exactly what it is. It's a fairly simple concept, but really neat to make one.
WinningNYC
Dot
hippybobby
Daht
SkycladNightStroller
Dawt
Elusivehawk
It's a simple spell but quite unbreakable.
alRakoun
It detects small changing magnetic fields. The changing B-field comes from the AC mains charging and discharging the severed wire.
alRakoun
Even though the wire doesn't form a circuit in space, it has a reactance and stores and releases a very small amount of energy each AC cycle
alRakoun
So in effect, it forms a circuit in time
LucentSable
In effect it's an antenna. Not a very good antenna, but still an antenna
ThisIsJustMySecondNSFWAccountMoveAlongOrPMmeIDontCare
AC voltage detector* this thing isn't going to do anything for DC
MoepsDump
I mean most power networks use AC anyway...
Jarwren
Well you could spin it really fast to detect DC voltages... :D
AaronOnTheRocks
Can I expect be made for DC?
WardSharlow
It could detect a functioning DC circuit. The intensity of the M field is a function of current.
AJMansfield
This functions via capacitive coupling from the probe tip, not m-field interactions.
ChronoKing
with a steady current, it will "blip" at best. You need flux.
WardSharlow
You know what? I just remembered my Faraday and his problem with input/output symmetry in coils. You are correct.
WardSharlow
You'd have to move the coil back and forth like a metal detector.
todayok
There is no current in the video. The wire is plugged in but no load.
MrHandsOn
Try this at home and grab or touch that bare spot and see what happens.
alRakoun
There's a small changing B-field due to parasitic current from the reactance in the attached wire.
derju
Technically the wires act as capacitors and therefore a very small current is always flowing
justmovealong
You're right, people love to downvote tho.
Bytencoder
But that would qualify as AC. And the whole thing is a transmission line?