That's exactly it :). Or it comes out together with its guts :).

They just didn't finish the sentence... ran out of ink... tsk-tsk

Maybe the cable is not waterproof but just the strip!

Or a 'Water diode' lol

Agreed, best part of the video imho. LMAO

I saw it

It was also used to test if there is any leakage current. Thats a multi use ladder!

It's a budget version of a swimming pool, just like the LED strips :).

I was expecting 3 chips in each 5050 package, like it is in the white ones. There's just 1 chip in each package and only the middle pair of pins is used...

Niiice!

Probably not much, given how the LED strip filled with water... so definitely not waterproof!

You add a very low, say 2 Ohm, resistor in series and the voltage drop across this resistor will correspond to the current flowing through it. He would have connected the two end of the oscilloscope probe at the two ends of this low resistance resistor.

Who would use this chinese rubbish?

Hát igen, szar kínai ledre lehet mondani mindent, csak azt nem, hogy biztonságos.

kartik rajurkar He explains it on his website, danyk.cz

This way: danyk.cz/wmetr_en.html The circuit is built into the power extension.

Thank you sir..

It sounds a bit dodgy

Only in my bathroom (not in the room where my swimming pool is) :)

Interestingly our RCD (plus a UPS) saved our aquarium fish one year. The 180 litre aquarium sprung a leak at about 2am while we were asleep. The water ran along the wires from its light, filter, etc. down to the power strip and tripped the RCD. My PC's UPS cut-in and its loud beeping woke me up. I turned on the room light to find that it was the RCD had tripped and not a power cut. When I headed for the utility room to reset it, I could hear what sounded like a burst pipe. Indeed it was panic time to rescue the fish and clean up the flood. Thankfully with the help of a few dehumidifiers and fans, there was no damage other than the aquarium. Besides that incident, it's also surprising the number of white good appliances we had that failed with a ground fault, e.g. our last fridge, chest freezer, deep fryer, panel heater, etc. failed with a near zero Ohm resistance between the plug's live pin and the exposed metal of the appliance.

Yes, RCD can be quite handy :). Unless it keeps tripping for no reason. I experienced just few ground faults. Once we installed a new light and it was tripping the breakers. A mounting screw accidentaly cut into the cable. Once I had a ground fault in a classic fluorescent fixture. The winding of the magnetic ballast shorted to the metal core and thus to the metal body of the fixture. Having no RCD, the winding was just burning and didn't trip anything. The resistance of about half of the winding that happened between live and ground, wasn't enough to trip a 16A breaker.

Older instalations (TN-C) used just 2 wires - one live and one wire as both ground and neutral, called PEN. When the PEN broke, all grounded appliances became live via the impedance of the appliances. This is why TN-C was abandoned and new instalations are TN-S (3 wire).

You're right, it may actually be TN-C-S, but it is often confused :)

Nothing happened. You must obtain compliant certification on any consumer electronics product that you import and put into circulation in Europe. Obviously a manufacturer in the country of origin could help you and provide certification documents (which could be from an accredited test lab or done by self-certification with a compliant test protocol), but they didn't, and they don't have to, and since your seller is outside Europe too, they couldn't care either.

CE happened to actually mean "China Export" :)

Confirmed Electrocutor

Jon Johnson China

Sadly, Variacs are quite expensive. A new 250V 10A variac costs about 250 USD. Even a 50 years old working one costs about 60 USD. I was lucky to get a faulty one with a broken contact for 25 USD and fix it myself. (1st World Syndrome: You can buy everything. You don't have to build or fix anything and you don't learn anything.)

Thanks a lot :) so we know the 1sy and 3d world syndromes, now we need to know what is going on with the 2nd?! ;D

Why not?

For Science!!

DiodeGoneWild disassembles it, and completes a thorough teardown, so you don't have to. :) Or better still, buy something better. :)

Mehdi

I don't know exactly, but probably ONE receptor in the eye, pixel so to say, can't respond to 100 Hz flicker, but the ones adjacent to it could be triggered with some delay. We can see the stroboscopic effect if we move our eyes/head fast enough, which wouldn't be possible if the image in the whole we perceive were filtered below 50 Hz or so. So I belive we can see and our brain can process way faster movements than 100 Hz, just proably the same "pixel" can't react that fast. And I totally agree with you, flickering lights are very uncomfortable, can cause headache. The same issue is on the roads as well, those VW and Audi red tail lights that are using PWM without filtering are distracting at best...

cuz he is not a native english speaker