Really useful flame lamp variant.

unusual LED lamps and cookies middle cookies from Canada sent by Kim who also send us some MREs to try out so we'll be doing them later on but the star of this particular video was suggested by a friend called Peter said I know you've done some of these LED flicker flame lamps but this one is very very different I'd recommend you get one and see what it's like and this ebay sellers run out of them but by looking at the image there was one that was particularly distinctive the casing of it's a translucent keys that comes down and then it sort of overlaps onto the white base here so it's a typical looking lamp other than that of a design feature we're gonna have to see you just don't know what you're getting at the moment because these lamps are evolving so quickly this I think is one of the latest evolutions it's got the same air feature that you've got there three effects that are always defaults if you turn this off and leave off for a length of time then when you turn it on or always default to the flame effect which is really the main effect in this is only drawing about 1.6 watts of power terrible power factor are suggesting there well I think it's yeah is a switch would Paris play and if you turn it off and on again now let's do it at the the poppy it goes into static mode turn it off not again it does the completely useless ramping down mode and then turn off not again that goes back to the flame effect now what makes this lab particularly special I'll unplug it before I do this is there let's unscrew this shove the hopper to the site this comes apart Tupperware stealth and whereas the other ones have had a circuit board a power supply this one has a purse playing the bass and then a circuit board with the round circuit boards that flex bone above it this one is just one solid piece of flexible circuit board that is ruled round in itself and all the circuitry is down the left-hand side you've got a maker controller you've got 16 transistors a voltage regulator one resistor for all the LEDs which is a bit odd but it doesn't get too hot and then all the LEDs themselves and it's clear designed to screw around onto itself and then solder onto these points here with the circuitry just topped inside but this one wasn't where I don't think it would fit in if you did that so what they've done is they've just said I've listened to up they've shoved it in and then they let expand out it's worth mentioning them for extra diffusion in hue there's also a plastic shoe but in here as a liner that is quite well perfectly spaced I mean it almost it looks like a it's been molded in but I think it's a separate one that's been glued in afterwards but it provides a double layer of diffusion with a little sort of air gap between them it's very precise the circuitry is based on a little power supply in the bottom here let's get this out is this gonna come out it may not come out it is jammed in it's glued and a thing correctly but what can tell you about that power supply is it's a 12-volt power supply and it is unfortunately referenced to means let me prove that it's reference to the means if I turn my continuity tester on in the true style affair the fact is going through a bridge rectifier if I go into the post of a negative connections here and there just I try all combinations so let's go from the positive onto the shell here that is immediately showing you've got a response there it's not that it's not a decisive response but what about the bottom there no so let's try the negative connection to the show and that is a diode and that suggests there is a direct connection through this so although it's a 12 volt supply it is not isolated so resist the temptation to go ooh and there pull it all out while it's plugged in go look at that and then grab something that's our stand to find yourself getting a real clear effect through your fingers so the circuit is very interesting I'm gonna zoom down on this and we shall explore it in greater detail it's a very neat circuit board there's all the LEDs and they're wired as multiples of 3 even though they're used as peers in each section which is echoed along there you've got the hold on if I just if I mask off there that's one section and then that's repeated again and then it's repeated again and I'll discuss later about how their LEDs were but there are word and multiples of three to match the 12 volts there is just this one resistor dream that the Java ver limiting the current to the mall and you'd think that would get quite hot so I got the thermal imaging camera out and I looked at it ignore the fact that the outline that superimpose is over the thermal image is slightly out of a line here because when you're up very close the two cameras are at different positions and it shows that's being different so I thought it looks like the heat spot is in the middle of all the LEDs it's actually below just below the LEDs that's the resistor it was a tip temperature of about 40 for a point to ambient temperature is about seven point three it's you know it's not it's less than their 40 degrees above ambient and that was on static when all the LEDs are lit continuously because that's when it draws the most current the other little dot of warmth was that bit there which it's actually underneath the chip as a pushed above it which was the voltage regulator I shall show you that right now so here is the circuitry there's a con limiting resistor the LEDs the maker controller it's got the little capacitor there on the across the supply a 70 ll5 voltage regulator and then a diode feeding faster and that then powers the chip the chip drives these transistors via resistors which then switched the LEDs down to the negative real and that's all there is to it really it's quite a complex and densely tracked circuit board it's double-sided and it's absolutely covered in tracks a good resume backer again I'm going to bring in the data that I have gleaned off this so I've already been doing some exploratory work in this I'm looking for my pen I have lost my pen there's a pen the LEDs are in pairs like this it's a really common style for the animation but because they're multiples of three and there's three sections of this these LEDs are sort of wired em as a pair plus they share one led from the next set and then the fun it also has the peers but they share the other led so the middle one has quite a lot of air more tracks and a quite high density of tracks because it's its LEDs amongst others the exception to that is the tip of the flame which is as usual it's three LEDs and they're just treated as a separate come three LEDs each time the CPU is not marked it's an eating pin trip pin five is zero volt then fourteen is technically 5 volts power vets that positive for real but in reality because the secretary here it's going to actually get about 4.5 volts and and the secretary is very simple you give 12 volt real Commun one common resistor for all the LEDs so technically speaking that is multiplied by about 16 sets with one of them the peak one having another set of a three LEDs in parallel with that just to make up that large number of LEDs dimmer LEDs at the peak the supply for the CPU is derived from the 12 volts there's a capacitor locally and a coupling capacitor a little 70 l5 let's write seven eight L or five really common voltage regulator and then it feeds the chip but via a diode and there's another little two coupling capacitor which is also probably doing that timing thing there it's just to introduce a very slight time delay for that on/off changing the effect thing which is kind of pointless yeah there's a 1.6 K resistor to each of all the 16 transistors and this is for Oak was a bit weird you see I was just probably around I said Oh that'll be an NPN transistor because it's switching to the negative feel it didn't really measure as an NPN transistor it measured out it's a PNP transistor I checked up it's a 2 T y which is a PNP transistor which normally switch it to the positive real but in reality they're switching to the negative real position which is odd not sure why they did that a couple of things come to mind someone may have screwed up and got the wrong ones but it works or they may actually be deliberately alone with the fact that that introduces a slight current limits witches have just fey is an odd way of doing things that make so LEDs a bit I really don't know I really haven't a clue of why they've used a PNP transistor instead of NPN it's very strange particularly the circuitry is perfect right up to that point then it's just that little mystery hmm the current at 12 volts it draws 100 milliamps in the flee mode at static mode it's a hundred 80 milliamps and the arrangement of it in the flat panel hold on you know what let's say I cut this off let's connect it to the 12 volts here I've connected to the bench power supply so let's a lot these often care I want to get that Paris play out here as well so I'll also break this out I'll take a look and see why it was at passing it was showing continuity to the main side it seems quite odd normally with that type of circuit I would kind of expect an isolated supply it doesn't really I'm not sure why a regulated buck converter is hard if it is a buck I would've thought it would be isolated so I'm just going to take this away and bring in the power supply and we'll turn the voltage down and we'll see what voltage it kicks it out what are those things about this is that if you get an application where you want a larger area of flame you can mount it flat you could almost mount it in a picture frame let's get the polarity rate so I do it immediately nuke the thing and there's no visual output yet the voltage is too long let's turn it up until the flume effect starts okay it's starting about it starts appearing at about 8 volts and as you that you can see the visual effect and I could actually turn I could turn the light off here and I could take the exposure up here so that it's literally at 8 volts it's giving a more dispersion effect but it's only drawing 5 milliamps that's ridiculous as I turn up two lane vaults it's drawing 20 mili-amps and that is Breit main volts at 20 milliamps that is ridiculous for how bright visually looks you know this would be more than enough in a home environment just if you're looking at something not to be offensive but as you turn the voltage up more let's go up to 10 volts and this is where the cameras going to kick in and team it down of it at 10 volts the current is 50 milliamps 11 volts 80 milliamps and going up to the full 12 volts it's about 100 milliamps and it's quite actually offensively bright now because it really would need defused at that so I quite like the flag way down at navels you're getting a good visual effect at 20 milliamps it makes me wonder how long this would run off a pp through battery I mean gradually voltage you go down that tail off quite a bit but it would do quite well that's interesting so I'm just about to turn the light back on so something that's going to be Swampert ammo you ready for this oh yeah and we'll lock the exposure off again so it doesn't Weaver off and down so I think this is worth buying just for the panel as a sort of visual effect it lets you either create out flat or even just arch it roundness of 180 degrees which would give quite still give quite a large coverage and give that larger flame effect right okay the next thing you want to get into this this I'm guessing is gluten must be gluten because it's not coming out easily let's say use unreasonable force I'm not particularly fond of a 12-volt power supply that masquerades as low-voltage but all this may not be coming out is that gluten with solid hardware isn't I think it may actually be glued in a solid hard resin it's never stopped before though let's not close the pliers on my hands hello I'll be hit them oh yes really it's a that hard white resin they've used so let's say it's lit this open and see why it was a reference to regular to the means that I mean yes it may just be a buck regulator so I the disfarmer does have one two three four pins it almost looks like an isolated supply what is the number of the ship H&M semi hm - 741 yeah you can be able to see that mm possibly not sure actually you know you get their advantage of the much bigger screen than I have so at some point this will be in focus and the since foreign I'm guessing is just probably it it streams that you know for yeah for all the extra work it would have been so easy to make this an isolated supply but ultimately it's inside a lamp so they don't really have to it's just a shame that this isn't an isolated 12 volt supply but yeah there's continuity right across from one side to the other so I it is really just completely reference to the means so that must maybe just be using chalk and inductor instead of a transformer and then just sensing the voltage at other sides and it will have some sort of threshold there setting odd yeah very strange but yeah I definitely like this panel this panel is very neat I can think of lots of uses for this I still get that air we use of PNP transistors if you get any thoughts about that tell me in the comments below it's quite strange but this is a very nice panel it's really quite smart one final piece of the jigsaw why did they use a buck regulation the answer is that it was the simplest solution I looked up that the HM to simmer for one in Google and it instantly came up with the PDF file the datasheet for it in the first hit which was very good and it's in English that makes it even better and what makes this special is if you look at the integrated circuit in the circuit board here you'll see that pin number three is not connected and that's the feedback pin and the reason for that is if you look at the data sheet it says default 12 volt output with feedback floated so basically speaking without components connected to that it will automatically set 12 volt supply which is exactly what that little circuit board needed the circuit board itself is quite nicely laid out at home it's got the very little component count the supply comes into it and the first thing it goes through is this fr1 fusible resistor one which they've just used a zero unlink now the surface mount resistors are a little slab of ceramic material with a coating on them a conductive coating and in this case if the 0m link it's just basically a highly conductive coating it's got very low resistance and the normal application for a zero ohm link is just to shantae pads that perhaps you had multiple resistors and series and decided not to use that you can shunt them out or is also sometimes used to jump over tracks that pass underneath that was just a convenient alternative to what would have been a link in a traditional circuit board but in this case they've used as a fusible resistor and are guessing that with enough current the coating in that is going to just go bang and it's probably got fairly little mass so it probably will blow clear so it goes through that fusible resistor and then to the bridge rectifier the bridge rectifier converts the AC into unsmooth DC which then gets smooth by this capacitor here which is the electrolytic pitches a chong x10 maker fired 400 volt capacitor the post of connection then goes to the integrated circuits interesting that all four pins at that side are presumably it's for heat sinking but they're connected to the common positive there and there's a 1.2 ohm central that's used to sense a peak current in the circuit we had going through them doctoral and then really after that you've got the output faster they're hanging off the end and then just two diodes the capacitor and that sense resistor and that is it so it's a very very low component count and it kind of tallies up with their the one of the examples schematics the application circuits are the notes they're very very small compared to the rest the data she did been a shift it just skilled that up a little bit the way this works a the inductor limits it stops any sudden high flow of current if you pass current through quickly or try to build up a magnetic field and in doing so it sort of restricts that almost like a almost like a resistor but not giving off heat and also unlike a resistor you can't just rely on that continuous it's can only be done in pulses to build up the magnetic field then let it collapse again so what this circuit does if the voltage in this capacitor is balloon at 12 volts it'll allow pulses of current limited by this inductor to actually enter that capacitor to charge it up until it reaches 12 volts and then also have stopped providing those pulses until the voltage drops again it just basically keeps it topped up and it can do that directly from the means because ultimately in this case the circuitry that's powering this panel here is inside a plastic enclosure away from touch so it just makes it viable to have that 12 volt reference to the means so it's an interesting thing it's quite complex circuit there is a page at page 3 of the datasheet is just a block diagram and it's stuffed with circuitry inside it's got lots and lots of modules and protection and feedback and stuff like that quite an interesting thing notable that it says with audio noise free operation I think that is to do yeah it's not a fixed internal clock so I'm guessing that just spreads the switching over a set of larger spectrums so it is that quieter unit it's not just going to push look one with frequency like many other switch mode power supplies so it's a perfectly logical choice for that application where you wanted look important count 12 volts applied to power these LEDs so yeah it's a reason choice and quite an interesting lamp

Channel: bigclivedotcom

Views: 126,802

Keywords: led, flat, panel, screen, grid, matrix, video, flame, fire, lamp, 12v, non isolated

Id: _KhtBA0EHDM

Length: 20min 5sec (1205 seconds)

Published: Tue Feb 27 2018

Reddit Comments

[u/TurnbullFL]

Dang those are getting cheap. I paid $28 for the original Junolux less than a year ago.

[u/leonbed]

So you should be able to build a battery operated flame lamp with a 3s lipo or power it from any 6-12v supply.

It would be kinda neat to have a portable flame lamp

[u/muff7]

Anyone have a link to this on eBay?