Horrific LED tester that can literally kill you - (with scary schematic)
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- เผยแพร่เมื่อ 21 พ.ค. 2024
- If you have one of these then you may wish to either stop using it or completely change the way you use it. At the very least, wear insulated gloves and make sure the unit is unplugged after use. Do not rely on the onboard switch.
There are safer units available that convert the incoming power to an isolated and current limited supply, but this one pretty much puts full mains voltage straight out.
The bizarre LED dangling through a ragged hole in the ungrounded case may actually be a crude FUSE! Because if the positive lead touches grounded metalwork there will literally be a dead short, with just the internal rectifier and the LED in series with the mains supply. LEDs do actually make surprisingly good fuses due to having a microscopic encapsulated bond wire. They do sometimes blow in half though... Sadly, the LED will not save you from electrocution. It takes much less current to kill a human than to blow an LED bond wire.
Technically speaking they could have made a marginally safer unit by putting a capacitor on each leg of the supply and limiting the current to a much lower level. Even high power resistors could have been used for that. It would still pose a shock risk, but with much less chance of being fatal. But for a proper reliability test on a faulty LED panel a higher current may be useful.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:- www.bigclive.com/coffee.htm
This also keeps the channel independent of TH-cam's algorithm quirks, allowing it to be a bit more dangerous and naughty.
#ElectronicsCreators - วิทยาศาสตร์และเทคโนโลยี
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A circuit designed to protect itself by blowing out the human connected to it.
everything is a fuse if you are cheap enough
*cheap = ambitious.
I don't hear anyone complaining.
"A stunningly simple third world interesting design."
Skynet becomes self aware. This is the start of the Rise Of The Machines.
Loved the brass screwdriver rolling towards the live probe, really brought suspense & excitement.
Just seeing that made my heart sink, lol
"Why should Clive have all the fun," the screwdriver thought.
Hold my beer said Electroboom we will produce some sparks.
Brass is an insulator right.....
Criminal not to include a timestamp... 8:05
If the price was lower " Like $1 dollar" it would be good for the metal case.
Hopefully there is an inverse Big Clive effect which pushes the price down 50% instead of the usual...
I'd buy that for a dollar.
@@shawbros This could look bad for BigCliveDotCom Johnson. Scramble the best spin team we have.
And that IS really about it. I like the case, that's ALL
I made a similar unit of my own design for testing high voltage LED modules, but I didn't bother with a case at all initially because I planned on being far away from it when I supplied power to it, and certainly not holding any probes.
that little LED hanging out the front...wow
and I love the switch that might easily give the impression that the unit is switched off and """safe""" in the 0 position, when its 100% very much not even slightly off at all
When he pointed that out I thought the same thing! "The *off* setting isn't actually off? This thing is always live when plugged in?????"
I have two ebay-rules:
1. Never purchase things for wall outlet
2. Never purchase things for your mouth
I don't know what concerns me more,the fact that people would buy anything off eBay and put it in their mouth,or that you only mentioned one orifice😂
@@notpoliticallycorrect1303but mann those plugs they have....
That leaves a promising number of categories available.
Paige NO!
I took my chances with a Full Bridge Rectumfrier. I thought it was a misspelling. It wasn't. 😢
Plugging in an ungrounded metal case appliance with Chinese writing all over it is a game I like to call *Shaking Hands with Jeebuz* because he may simply say "hi," or he may recall you to heaven.
Clive with either brave or foolhardly to even touch the case after he plugged it in tbh, I wouldn't have until I was sure it wasn't live.
everytime! I really would like to see him with some gloves on in unknowns like this... and that old metal screwdriver rolling around all over the plae EEK!😣🤣🤣
@@ferrumignis Well, being an electrician, I can assure you he does actually test the RCD devices in his house, and likely has a log of those tests, done monthly as well, and any RCD that fails to conform to the standard test current and time will suffer from near immediate replacement and have a meeting with the big hammer out back shortly after.
Note: If present, ground pin on plug is assumed disconnected from device unless personally verified.
@@Broken_Yugo Ground pin often relies on a BT connection, being loose inside the housing, often not even stripped, just cut off and loose. Plus often have seen the ground wire does not even have any wire, even the cheap mystery sort of steel in it, as that costs money, and they will just put a green yellow recycled plastic core in instead.
I'm constantly impressed at your ability to continue finding the shoddiest of devices to share with us.
There's no shortage...
Big Clive has certainly has a type 😉🤭
What about those of us who don't know enough about the dangers involved in using a product that is being sold on the open market? Being this channel's village idiot, I might want to buy this tester, and would assume it was safe for the use for which it is sold. How do people like me protect ourselves from such dangerous products? I am generally opposed to government getting involved in our lives, but electronic products should have to get a seal of approval from the government that the products sold are safe to use.
As an average consumer, it's tough to determine if a particular product is safe. However, there are definitely things you can do to reduce your chances of getting shoddy products. Buy from known brands and retailers. Don't get random unknown brands from Amazon, eBay, or AliExpress.
@@pap3rw8 Meanwhile most well known brand names are purchased by chinese companies to get used randomly wherever they think it might help the sales of cheap products.
The “human as fuse” tester, nice!
If your fuse blows you just have to change to a new technician with higher amp capacity and preferably no wife and kids
“Slow blow fuse” technician
You can tell the danger level on the “Clive Chortling Scale”. I think we hit 9.9.
£11.40 for death? Pah, make them an offer, should get death for a tenner , no more.
That's the biggest surprise for me. Hugely expensive for Chinese crap. Is this part of the trade war? They're charging us far too much for off the shelf WEEE these days.
I think Goodwill sells bath toasters for $5...
I agree... the price is PRETTY high for this killer machine.
Cheaper than train ticket to Beachy Head
Darth Vader talk !!
I love the translated text in the box at the left side of the label: "(Please look for professional and authentic products with guaranteed quality, and be careful of counterfeit and shoddy products)".
If this is the legit product then WTF is going on with the cheap copies? 🤯
I'm wondering if its a joke
i kinda suspect this IS the shoddy copy and there’s a legit chinese company out there by the name of KTG making good quality electrical products with this same warning on the front
@@yoymate6316 Yeah, maybe the shaddy copier even copied the sticker label. LOL
Please look for professional and authentic products with guaranteed quality, and be careful of counterfeit and shoddy products such as this one.
So the probe's live and "off" is on? Nice.
Low/ medium/ MAXIMUM.
@@runlarryrun77 Don't you mean rare, medium rare and well done.
Exactly
@@runlarryrun77 1, 0, and 11!
the probe is 50% of the times live and 50% neutral depending on how you plug in the power cable. Do you feel lucky today?
I love the utter joy in your voice when you see how dangerous this item is.
I love the dangerous stuff.
I just checked ebay and found a deluxe version with an LED voltage display that proudly displays "11th Heneration" on the front panel. Eleven attempts and they couldn't even get the spelling right, so chances of it being equally dangerous seem pretty high.
Could be for the hispanic market?
😆
The H and G are next to each other on an English typewriter so it's probably just a typo that was not recognized.
That one is a clear improvement on their "10th Hemeration" model though. Which in turn improved on the "9th Hemerayion".
@@rexsceleratorum1632 The first hemorrhagic version should be avoided for sure.
It is beyond belief that people would think that it is ok to sell something with the wires just hanging out, and a socket on the end. WTF. beside the fact that it is also a death trap.
China
people will buy it, so why not sell it
The place with twisted morals and ethics 🇨🇳
tHE CHINESE dont sell this shit in china, they only sell it abroad. Literally all garbage produced in china for US and UK, is not available in china.
@@adamdnewman it's commie ethics, if you die, the colony has another worker bee to replace you .
Everything about that death-tester is amazing!
It has it all: Ungrounded metal case, switch, random connector sticking through the side, banana terminals
Tis the perfect storm of hazards
I don't see how grounding that case could do anything to improve this piece of death. What could you possibly ground it to anyway, the AC in lead has no ground.
Grounding it would probably make it even more dangerous.
Let me open this up … one screw … two screws … three screws … a great night out.
"It was the best of starts, it was the worst of starts" - Clive, Big (scared to bits) It had me grinning all along XD
Well now we know Clive may have read Dickens. 😲👍
You beat me to it!
I liked the extra little touch of having a band-aid on his hand from a previous mishap.
@@sbalogh53 I was wondering if it was a slipped screwdriver, or maybe the spudger that was responsible for that.
It's a bit like a billion monkeys set loose in an electronics factory. Eventually, one working product will do something that passes as working. Just not this one.
Today it's called "designed by AI"
Did those monkeys finally manage to write some Shakespeare on their typewriters and moved on to their next project?
@@EllAntares Before it was called "Infinite Monkey Theorem"
You could take all the guts out and use the case as a Faraday cage to store your car key in.
I was thinking its a nice little project box but im sure you can do better for the price
I worked for a radio company in Germany, and all of the china products for testing were nearly the same quality. Simply produce 10000 units without approving quality and even be sure that it works. Then they write an email " ok next time we make it better, sorry" ?!
A friend of mine was an early importer of vapes.
He gave me a trial kit, and the power wart let out the magic smoke (not very good to vape).
"No worry, I give you another."
Same experience for me when we had modules manufactured in Schenzhen. "Oh, so solly... next time we better."
What do they care if they fry customers. It'd the other side of the world
My families company used reasonably simple controller boards made in the UK,basically just relays for switching big electro hydraulic solenoids,configurable with physical links. Apart from the small logic board for the controller bus they are nothing you couldn't knock up yourself.They never once had a failure, (their machines go to some of the world most remote,hard to reach places and used by some of the least 'educated' people,so sending out engineers to repair them,every five minutes is not an option,everything needs to be ultra durable)but after the small supplier went broke during COVID they were forced to source the main power boards from a chinese manufacturer until a suitable manufacturer could be found elsewhere.My father mentioned that he knew they would be poor but his hand was forced.Over half the supplied boards were really poor standard,many didn't work at all or simply couldn't handle the load on the big relays. He received exactly the same response from the Chinese. He sent one of his wiring harness guys on courses and now he builds boards from outsourced component parts,most of which is supplied by the original board makers supplier.
@@fredfred2363 and Shenzhen is one of the BETTER companies also... 😬
You'd think at least they would throw a cheap transformer in there
The effect of the “bean-counters” these Chineseum crap factory’s also employ ~ “you must make the thing small & light as possible; oh-no don’t put a transformer in it that will increase the size and weight of it”
@@samuelfellows6923That or using a regulator chip. We can't spare the $1.32 for a cheap buck regulator circuit, so just use a series resistor.😂
dude that's copper, we can't afford that
In China, YOU are the transformer.
I'm pretty sure that it's a Chinese method of population control: shoddy goods ensure a tolerable death toll.
Not cheap enough.
The laugh when the heat shrink comes off, the curtain is pulled back, and the great and powerful Oz is revealed... priceless. :)
Great business design ! If the employee dies, at least after almost doing a full weeks of work, you don't have to pay them !
The us railroads used to do that according to Hyce
Maybe the box can also be used for an urn for your ashes. 😂😂😂
The box looks like a pretty sweet little enclosure tbf. Just a shame about what it's housing.
It is a snazzy box.
The term "terrible electrical experience" needs to become a part of industry standard jargon. Whoever sells these "test devices" should just go all the way and start selling bathtub toasters instead, at least that would be more honest.
Sets the new standards of "Super Dodgyyyyyyyyy!" for DiodeGoneWild :)
Try using it for blowing up electrolytic caps for fun.
Definitely read that in his voice and accent. 🤣
Hyper Dodgy!
it is designed to be led tester, so it is current limited, wont be able to blow up any caps
they just went with a broom around the shop's floor. and from the collected bits the intern made a product.
I used to think that these kinds of deadly devices were just due to incompetence, perhaps designed by someone who doesn't really know how electronics works and is unaware of the dangers. But the more I see of these things, the more I feel like they just don't care if someone does get a fatal shock from their product. And the more respect I have for you putting your life on the line for our entertainment.
They're not stupid, they just do it the cheapest way possible for these eBay listings because that's what gets sales.
I think you may have overlooked a third possibility, that they are making these devices on purpose to kill off as many of us as they can without ever invading.
If someone dies in the West there are no repercussions for the company in China.
@@FerdinandFake Correction. They are stupid.
I think they just don't have strong worker safety protections and assume users will be careful, just like with that lamp tester thing Clive uses. I guess it's not much different than a worker using a regular power drill or reciprocating saw, they just know not to touch the dangerous part while it's moving, even though there's nothing to stop them doing it. That's my theory anyway.
This gives me anxiety. How many people are out there, using devices like this one with no clue that one touch would either hurt them VERY badly or just kill them? That is vile.
None. They're all dead already
1:25 I love the concept that there’s something even worse out there because it’s an imitation of this mess-
Quality bit of killer landfill.
Thank goodness for sane, good minded people like you to research, test and keep the rest of us safe. Careful cutting that shrink wrap off, its probably the most expensive component.⚡⚡👍
I'd say the box might be, it's probably copper clad aluminium? The electronics certainly aren't.
I like the self referencing “beware of shoddy products “ warning.
Metal case + two core mains supply = Don't touch the case!
About time Ebay and the like were held accountable for some of the dangerous stuff that is sold on their site.
Thank goodness you didn't get the shoddy version!
Shoddy version only has a half wave rectifier. ⚡
The Charles Darwin - Survival Of The Fittest LED tester!
Buy yours today!
lifes cheap in its target market. Just unfortunate its getting into the west too.
Man, although it made teaching myself electronics MUCH harder, I'm glad there was no internet when I was a kid.
10 yr old me would have been buying devices like this, completely unaware and unsupervised.
It's seriously scary to see what's allowed to be sold out there, and beyond belief that anyone could be so utterly reckless as to market such a death trap.
Wow. That's a special kind of piece of junk. They managed to somehow put four diodes in it and still failed at full wave rectification? I guess at least the case could be reused for a future project.
It is full wave rectified but unsmoothed DC between the probes. But different to ground.
I think thier idea was to use the plugs for a foot trigger or something like that. Still unacceptably dangerous to have banana plugs that carry mains voltage like that. I also love the led plug is flapping around in the breeze just trying to knick the insulation on the bare aluminum hole and make the entire case live. That's especially egregious since it's something that's going to constantly be wiggling from plugging in leds and removing them.
this is why i love your vids clive, going on little dangerous electronic adventures with you!
yeah it's electrically *STUNNING* piece of engineering. it *BLOWS* your mind, tho, heart is first. i'm *SHOCKED* about it being massproduced
Clive has a way of making a dangerous thing even more dangerous by powering it up with all the guts hanging out.
My first assumption with it not working was the led was in series. It just seemed dumb enough to be plausible. I love these danger boxes, always fun to open up
You were brave touching the finned metal case, without a (connected & verifed) earth conductor on the mains side.
My guess is that BC takes sensible precautions to avoid becoming a conductor to earth.
"terrible electrical experience" 😆
That thing looks like a electric fence control.
seeing Clive push the scissors hard towards his hand, we now know why he has that sticky plaster on his left hand.
Another great video Clive.
Maybe you could gather up some of the more dodgy EBAY purchases, then do a top five, or top ten video of Chinese ways to die! ( with a better title - obviously!).
Maybe they should market these as a euthanasia device. The light at the end of the tunnel comes from the LED. 😂
“But other than that…” following on from the previous “there is the risk of a fatal electric shock” is the reason I keep coming back here.
"Not only will this kill you, it will hurt the whole time that you are dying."
Designed and manufactured by KTG, a subsidiary of the WTF Group.
Marques Brownlee "The worst product I've ever reviewed". Big Clive "Humm, Hold my Beer!" 🤣🤣
"a terrible electrical experience"...
Wonderful understatement!
'terrible electrical experience' is a wonderful phrase
Ah, the Guangdong magic smoke and mirrors company strikes again.
Did they buy the interlectual rights from Lucas Automotive?
@ 3.20 'cheapo meter with slightly melted croc clips due to an incident '. Well that's let the cat out the bag for some juicy forth coming content... Mmmm 💥🔥😋🤔🤭🇬🇧
That sort of "incident" is just an average Tuesday at Chateau Clive
The last thing you see or hear is the LED fuse providing that audio-visual warning that you just grounded yourself to mains is the best thing about this.
I didn't know about the half-wave rectified power possibly not tripping RCD's. Now you mention it, it makes complete sense, of course... Thank you for unjamming the thumb from my posterior and waking me up.
Taking out the LED before any further testing was like saying your monitor isn't working before connecting it to a video source 😂
My jaw hit the floor with this one. The first thing I ever wired together was an LED tester. It was in class, I was 11. I used a 9v battery, battery clip, a resistor, a switch & an LED terminal. Housed in a wooden case I designed to look like a mini "hippy caravan".
It was awful, but it worked & posed no risk whatsoever. All that considered, there's no good reason for this product to exist, let alone be imported to the UK.
With a 9V battery you would need a largish boost converter to test the LEDs this thing is intended for.
This is for testing high voltage strings of LEDs, such as in a mains lamp or an LCD backlight. I have my own DIY version of this. Fingers crossed a much safer design.
The probes weren't a shock risk until you went and took off those screw things allowing them to be connected at all...
"IT WAS SAFE WHEN WE SHIPPED IT!"
Don't forget to order a spare container of smoke.
Well, 6 mA is the lethal dose for an average adult human, so I’d say the high intensity setting on the switch is definitely going to light you up! 💡
No it is not. If 6mA was the lethal dose then no RCD intended for additional protection would prevent death by electric shock. And that is precisely what RCDs intended for additional protection are designed to.
If I recall correctly, around 80mA is required to put the heart into VF.
RCDs are required to trip with a threshold of no more than 30mA
There is also a minimum threshold of current which if the fault current (difference between line and neutral currents) is below, where the RCD should not trip.
6mA is a violent and painful experience, but not likely to be fatal unless localised to the heart.
Who knew China would start selling personal electrocution devices for as low as $12 bucks? This is a massive technological breakthrough if I say so myself.
It's for those who have no medical insurance coverage. ,
If you have a good enough social score, you get the less shoddy model that only hurts instead of kills.
A totally classic video featuring a totally classic product - keep it up Clive :D
Well, I dare say that Tradings Standards would be interested to learn about those devices...
It's an expensive way of buying a cheap metal box and a few components arranged in a way which will make you dance excitedly before running out of breath.
The black switch has two positions due to the hemisphere you live in.
P1= Northern Hemisphere
Neutral = Equator
P2= Southern Hemisphere
It's the "Speed of death" setting.
If you've ever wondered why it's important to move the majority of electronics manufacturing out of China, this is why.
Great video as usual.
Thanks for taking the time to make the video and share.
Will a UK version of that be offered on BigClive Industrial Corporation's website? Thank you, keep working.
I was shouting at you through the screen to tell you to put the LED back the correct way before testing but you were not listening.
uses 240volts on a 110volt module and wonders why the resistor overheats
Maybe right
The Mains Voltage in China is 230 Volts RMS, exactly the same as Europe.
But is that same plug used? Sure looks like a north American plug for 120v
@@anthonyshiels9273
Chinese plug. It's a 220V unit.
i am in china right now and one of my favorite things is being able to just walk into some dodgy looking electronics shop and just finding stuff like this off the shelf. My favorite is still the thin flimsy plastic tube with speaker terminals glued to it connected to 220V that is pretty much required on every production line
If there's a power cord coming out the box, don't buy it because of the mystery power supply.
That design is their intentional up-sell opportunity. For only £5.99, plus shipping and handling, they will be happy to sell you their Isolation Transformer.
I’m surprised not to see a piece of vero board inside, I loved Clive’s laugh it’s a real hearty chuckle lol 😊
I like it when things don't always go to plan, we get to see Clive thinking on his feet and faultfinding in real time which is a good lesson and entertaining at the same time :-)
I found the exact same POS on Ebay in the US. It is advertised as a Backlight Tester. It *_does_* have 115-120 voltage cord, but it looks half-assed like your specimen. The seller wants $16.15 *_BUT_* free shipping! I have an isolation transformer and variac on my bench in my basement workshop. That was a great entertaining video! 😉
It would be a little safer with one cap in series with each mains input, but that would have cost them an extra resistor. On that note I'm surprised they used any bleeder resistors in this deathtrap. I think the better tool for this job would be a small battery powered DC-DC converter, extended zener tester sort of deal.
What a design! At least it has a nice case which can be re-used to something more useful
Need an interview with the mastermind behind this design.
I was kind of shocked (pun intended) to see it rectifies the mains! Kind of wonder at the thinking behind such a thing. Or rather, the thinking behind making it a mass market product!
it's not mass market, it's still aimed at small testing labs and stuff
3:58 best belly laugh I've heard in any of your videos. Love it! I needed a moment of unexpected joy. Had a weird day. Thanks 😊
No wonder all of their electric cars are bursting into flames.
Thanks for sharing Big Clive. Just WOW! Yikes.
This is the most amusing vid. you've posted; I found myself laughing out loud (almost hysterically) quite a few times. Was this _designed_ by a homicidal maniac. I was hoping you would run it at high setting until the 3k3 resistor popped.
By the bye, decades ago a fellow tutor and I were talking about ways of instituting very stable constant current sources; he told me of when he was in the RAF and they built the closest to ideal CC; it consisted of a vibrator inverter, rectifiers, and an enormous resistor. So, it had a very large source impedance and could supply up to around 2kV. And yes, they used it.
Well, at least you got a nifty little project box out of the whole thing!
I like how it puts out 27 mA, which is already pretty dangerous but still less than the 30mA rating of a typical RCD. Of course all that goes out the window if one of the probes is pretty much live.
Time for my quarterly death contraception review from my favorite Scot
Congrats on 1 mil!
Let's pay respect to the LED that survived 200V reverse voltage.
I don't know how you was so deadpan. When I saw it is in series, I cackled like a madman
8:12 Clive, you really do need to get out of the habit of using _metal_ screwdrivers; it's always (since I started watching your vids) slightly scared me.
200V of reverse bias on that little LED on the top when it is likely only rated for 5V reverse. I'm surprised it survived. (Well, it did look like the wire bond may have failed and needed re-welding to resurrect it first.)
I love the "for decoration" airflow surface area
That is a deathtrap, the schematic would make for a halloween decoration.
That circuit makes me think someone confused the external LED port with an indicator LED that was supposed to show whether it's connected or not.
That must be the crappiest electrical thing I've ever seen!! Everything about it! Thanks for showing us as this 15 mins of entertainment is its only use.