Chinese induction nightlight and i get the feeling that perhaps they just copied someone else else's listing here because when you look at the induction nightlight which induction normally like a body sensor like a passenger infrared detector and when it says things like three meter range. You are expecting a passive infrared sensor or doppler detector. In this case. It's a very interesting detector because it works by pushing it on and off that is not an induction sensor.

But nonetheless we have this uh. It's other feature here it comes with the chinese socket pins. Uh. The other feature is you can just unscrew the top off revealing live connections.

Which isn't that great for a nightlight intended perhaps for a children's room. However you're probably wanting to see this lit and this is where it gets very awkward because that means. I'm going to have to go through to the toilet here and film in the crew bathroom here because uh that's only way. I'm going to find a socket this fits in so uh.

Let's go through to the bathroom. Shall we. And there we are a little bit of flicker going on as you can see uh you can also see the mirror in here. Has been mounted by a very very short joiner because this is actually what i see when i look at standard mirrors.

In fact hold on that's more likely. What i see when you're looking at standard mirrors in places like this because the joiners don't seem to understand or the bathroom fitters that the tall mirror. The mirror has to be the height of tall people also where they've note our lovely lovely student grade shower cubicle here complete with the shower head at face height now other things that we can do here. I can plug this since.

This is a shaper socket into the 110v outlet. And it's still lights ooh doesn't like that it still lights. But isn't terribly bright okay back to the bench uh in hindsight. I should have checked that was in focus because that was probably set quite close focus.

But not to worry. It's got the the image of the thing across most likely interesting. I shall unscrew the cabinets to reveal the bare circuit board and we can already see there's six leds are rectifier what looks like a resistor and that's very simple resistive dropper. If it is it pops apart complete with passion for a detector.

It's not really uh to reveal that the circuit board has been sorted directly to the pins. That's what holds in here and uh presumably being clamped in there as well. It is just a resistor. What the value is that resistor it is 623 62k.

I have measured the voltage across leds they appear to be six chip leds. The voltage measured across them was about 90 volts. Which leaves so what's the dissipation of that resistor going to be let me just compute that one moment computation is complete. Uh it's passing about 24 milliamps and the dissipation from that little wide classic quarter watt resistor is 036 watts to be honest.

I'd rather they'd use two resistors for the voltage rating. And also to spread the dissipation. But they didn't how expensive is a resistor china. I mean geez they could have put on the other side breaking the track to the redirect fire over there as well it's just like why do they do this it's very strange.

Very strange indeed also instead of putting it in line to the bridge rectifier they've kind of got it looping back underneath here. I shall draw you the schematic for this that's the best bet one moment please and here is the schematic. The incoming ac supply uh goes to the resistor first which is surprising then it goes to the switch and the other leg goes straight to the bridge rectifier. It goes through a bridge rectifier and then it's just six leds in series.

Uh configured. As six chips per led very simple. It's almost like the configuration of the tracks around the bottom. Here is very odd like not really logically thought out it's very strange how they've done it.

But that's how they've done it kind of looping back in itself. It's very strange. But it is what they've done uh interesting so that is what's inside this completely not induction nightlight. It's definitely got a range of three meters.

You just have to walk over three meters and press the button that's how it works. But there we go interesting. But uh i mean i suppose one redeeming feature they have used the multi chip leds. And the good thing about that is that say for instance they have got one here.

The poundland equivalent uses three leds. But they're just single chip leds in here. So it's kind of less efficient. A lot more has been dissipated across the resistors.

But the resistors are actually better rated than this one. But this is perhaps a better approach in that regard. It's more efficient. But it still means that they could have done with an extra resistor in here.

But that's not a surprise for this type of product. But interesting to take apart anyway well worth taking apart and exploring.