vladimir michaylithenko

Saved 12/28/15 7:56 AM from we do

Light-emitting diodes - food (LED drivers)  See details »

 
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  • 00:00: old and kind Edison light bulb Skye how beautiful she is think some it's true genius everything just medical lamp is a primitive work on the regime really is not illuminant
  • 00:30: on your case heater because efficiency is only 3-4 percent old bulbs Lich who remained in the last century came replace more modern lighting devices such as fluorescent lighting or LDS say differently referred to in abbreviated form more modern discharge lamps eg discharge lamps such as xenon and other but recently
  • 01:00: already in the 21st century entered the fashion LEDs our today bidets conversation will it is about LEDs and it will only a clip from the series we devote LED LEDs are included in the fashion as I have already said, and do not want to concede their positions are made based on light-emitting diodes semiconductor Crystals know everything
  • 01:30: probably basics work but I further rollers I will explain everything in detail my hands now! LED matrix 50 watts it is 50 ultrabright white heat LEDs connected parallel how consistently to the rows of whether it is time to consistently and the main series parallel are connected to each other operating voltage this matrix It is in the region of 40 V but some know that many
  • 02:00: it is known that LEDs have relatively high efficiency but in reality This of course is not so said some sources mention that the efficiency of light-emitting diodes close to a hundred Interest that is, well above 90 percent to Indeed those LEDs are we Now using for example domestic Lighting advertising billboards lanterns and many other devices
  • 02:31: have efficiencies less than thirty percent why he led by it's nature It has a fairly high efficiency that is something that within the crystal It is due to process by which led lit has efficiency but more than 90 percent Once this internal mortars structure and if look here for power LEDs We need a power supply who turn It has some
  • 03:02: efficiency if you buy LED Spotlight say on 50 watts you have to given the fact that the driver AC Power which is needed for power your LED has some to specific efficiency which can not exceed 70-75 best 80 ie 20 per cent percent loss already We have LED too considerable losses Mostly I would
  • 03:32: He said initial energy not converted the right heat so LED need and cooling worthy to provide working conditions in Later, I certainly consider mischief on design power supplies needed to powering like these high-power LED matrices talk about basic abundance dignity disadvantages such LEDs and now I would like to dedicate this video is for beginners that is, we will
  • 04:03: to consider designs that allow feed led by LV power supply in particular source Battery powered and so the easiest power supply which need for food LED before you today a scheme we We know of LEDs one battery is not work a minimum voltage not to work LEDs should be greater than two volts
  • 04:33: maximum a single crystal LEDs are more three and a half animation course It depends on the type of specific LED about this PSU bit Later today, I would I wanted to see construction here the other power supply to you rather simplest scheme driver for powering LEDs from low-voltage source in particular This scheme applies The electronic lamps
  • 05:03: why electrons because the most lighting normal illuminant ie flashlight this moment fully has completely electronic stuffing in they use high-quality LED drivers who allow powered LED pretty powerful type from one batteries e.g. type of driver but with the type of company xd 381 for it high-quality
  • 05:34: LED driver with high efficiency the efficiency of the way the driver is about eighty five percent with dispersing power if the order in Uvat more precisely 450 miles, and here I am I will call input voltages from integers 0 9 volts to 2 and 2 ie the presence here of driver can implement a simple circuit and powered quite powerful floor watt LED from just one the finger
  • 06:04: battery battery by the way not necessary half here can take a finger rechargeable batteries nickel metal-hydride or Nickel Cadmium with batteries 12 volts the more capacity Of course the longer life of your batteries on one charge and so here in front design your own It consists of a very LED driver and throttle inductance well here
  • 06:34: It does not matter here e.g. 22 micro Henry the driver itself u23 body made of similar to the transistor smd I scheme removed from the lantern ordinary LED Join Now led us Uvat circuit you have now I see I try to heal Light-emitting diode showing that this work design's request
  • 07:04: due to the high output the driver can be like said plug enough powerful LEDs us let line out parallel connected LEDs course at use thin LEDs need calculate the current current this driver reaches 120
  • 07:34: ie milliamps when connected thin LED resistor and when required connecting resist LED high power say the floor even one watt of can be connected limiting resistor is not needed since the current valid through LED exceeds 120 Menandr So move on to our today's interview
  • 08:04: more accurately collect unit supply the same Which can powered one led well and Of course some all LEDs only on one the finger the battery's circuitry on all sides and so what we have here two transformer independent field windings ask bipolar transistor npn ie feedback conduction base resistor itself LED More
  • 08:34: nothing for this scheme we do not need, and so on winding through transformer pretty good cause and flax designs for beginners radio amateurs Now we gather together everything to be clear and not Lily is no question about transformer transformer can It is made of absolutely any type rings it does not matter you ferrite or ring is made from
  • 09:05: iron powder such rings as we We know computer PSUs in as output chokes are ferrite rings these can be found here in electronic transformers 50 and more on W ring too of course I said no principle can be ring is replaced neck or even an n-shaped core type and those on the edges if That this would not be in
  • 09:37: there is the course you can use another kind core in Specifically here are cup of ferrite any absolutely any size discernment is not too important for handiness I wind on the ring which has already chosen that's normal ferrite ring I withdrew from the block Power can not remember I do not remember from
  • 10:07: a power supply unit on this ring we will do winding at the same time the converter is it possible call Oct. 10 converter operating frequency about 300 kilohertz well course work first frequency all depends on many parameters particular restrictive resistor can be parallel to plug
  • 10:37: capacitor configure any frequency of coils all transformer it does not matter because the circuit is not very critical and It works with any layouts components intended basically here to food such small with three ultrabright half mm LEDs I removed from the LEDs ordinary pocket flashlight connect just such LED and so move on to the details
  • 11:07: the winding transformer First of all we We need winding wire whence take a winding itself lead wire Me neither principled possible take a single-core wire lacquered diameter coated with from 1 0 to 1 millimeter more sense I simply do not have the will use for because the roller will will be done quickly use more here is a handy
  • 11:37: wire can be cut Now the old trail from computers are stranded wire wire insulation rubber we need two wires each for one winding so I picked here did not lead cut then we have here is there are two individual wires shake best Of course the two right to carry out at once that they are now We will do so starting winding wind can
  • 12:08: quantity number of turns I transformer I said can be ie different scheme will work run from coils 5 up to e.g. each winding to say June 10 turns thus with number of turns Frequency of course at You will be different base resistor too the base is not critical
  • 12:39: resistor may be denomination literally from B10 even if smallish us the power of less than 1 half volt can base resistor remove all that is whether the scheme generate and without base resistor itself steam circuit of it represents Just now he generator formed all in one transistor by the way the ones who do is not very
  • 13:09: dealt electronics, I would like to show closer This schema fragment Here the designation gant have ground the land It connects to the minus a power source in this case battery minus on top of the mid-point the transformer It is, instead of docking two windings It is connected to the positive feeding input range voltage circuit also a fairly wide schemes will have generating well of course minimum
  • 13:39: supply voltage It depends first turn from particular type transport and transistor which you used transistor too This scheme does not critical like as a base resistor I said denomination this resistor can be from up to 1 by March 4, even 10 kilohms circuit works without issues I have tried many options but if comfortable to play with scheme is possible
  • 14:09: base resistor replace crib I am that is variable resistor and play with frequency and achieving best blowing out LED is pretty interesting I think especially for beginners will interesting experiment with the circuit here I He finished winding 9 wound turns almost 10 turns we finally 4, the end 4 is obtained the end there are two
  • 14:39: the end of the same boat, and Two other end of the other now need to we do now you need to connect one winding to an end the other end of the second Winding do it on Indeed, without multimeter pretty difficult because by prozvanivat winding and something other subjects therefore include multimeter mode continuity and diodes We find the winding If there is now understand everything if one
  • 15:11: winding So to make it to it was clear set continuity mode diodes can see that there is no continuity that is it there is another winding on a call so we Here we find one winding closer we show here second winding here this we have one on the left and right, too
  • 15:41: Mutko us whole winding again check two avoid shoals here that's all right and then same here Now what we are doing here winding a second winding Now take a winding one end of one winding and butted with the other end of the second
  • 16:11: Winding that is all in We had a lo some docking point This is the challenge we in the scheme's the most from here to the allotment choked plus power supply So now you need from Now for zaludit convenient work better use tin which already has been
  • 16:43: It contains in itself a share rosin all now to this approach we You must be soldered be carried positive lead soldered By the way I do not advise pay attention to orderly winding as it
  • 17:13: unimportant factor for Essentially the scheme itself is not is pretty high-quality therefore, the scheme only for in the visual purposes and as necessary further zaludit the other ends winding order to further it was convenient to them soldered components then I said take the base restrictive resistor as has been said here on scheme we have 1 kilo of it
  • 17:43: Well I installed I looked at v1 kilohms resistor is not so I will be found use resistor 210 Here's a way power resistor too literally principle can be Now take a resistor say 5 watts well, I think it makes no sense, and 5 raise up to 125 watts 1c love 0,25 15 can also be
  • 18:18: because if there is there is no power ie no resistor therefore need low power so we resistor sealed today I will show a closer everything to be detail seen we sealed resistor available to one of ends one of the windings there is no matter here we can take the court ie stock up
  • 18:48: important not to solder on the plus power here so all go further What about transistor I myself transistor use high bipolar type is 1300 3 As other I could not find a quick as if to the transistor is not highly principled can be used absolutely any npn feedback transistors conductivity
  • 19:19: bipolar transistor from KT315 say more powerful Cats need to say 817 to-t 815 kt819. T800 there are 29,805 it is all of these transistors fine fit desirable course since the scheme low-power uses thin transistors cheap KT315 and think
  • 19:49: each each he there kt3102 there are other do not confuse pinout transistor because the findings have various transistors certainly different case we have I 13 even with transistors j series and we are The first leg here a first terminal emitter Average output goes collector and extreme the conclusion is we base
  • 20:19: that's how it comes to all transistors Series EM-2009 DJ 13001 there is more here see according to the scheme emitter we It connects to the minus power that is this conclusion should we connect to a minus food on our most extreme base pin is connected to the free withdrawal Now resistor namely that we
  • 20:49: will do all soldered resistor we continue, I have not had zaludit here My concern now is I do to
  • 21:21: convenient to operate and so see the scheme that we stayed only here loose end winding transformer which should connect to collector transistor connect both scheme it's like that
  • 21:54: about LED I I will nourish it inverter unit supply or driver call it what you want three and a half mm above the bright white LED to him I advance Solder the wires and He is now pay attention to polarity LED polarity there too There are of course, I Now we will explain how we do it all
  • 22:24: check with LED using a multimeter Now I think a quick check although you can certainly connect circuit run the scheme if LED will not be you can shine change the polarity you all will work too put continuity mode diodes take positive probe multimeter stykuya just one of conclusions negative to next we see that
  • 22:54: our LED It caught fire so on take and turn like polarity We see that we LED lights that is, I get this here we have where negative and positive then we just have a Well, here we have negative here at the cathode we anode as anode and memorize
  • 23:28: anode we have to go to the collector transistor sealed and events collector simple the movement of the soldering iron We sealed the anode LED cathode to go together the emitter to minus battery so it It has perhaps the last
  • 24:02: bar and of course you need the solder negative this operation is carried out completed taking the most common wire that we took from the loop sealed to the emitter co. docking and LED emitter in this way pretty hard
  • 24:33: seal because One conclusion February 2 wires and both of you need wires to keep it was possible seal them Perhaps all of us Now this has turned simple block power that can be use flashlight such as food from a single battery by the way how the battery already initially I said can take the battery is
  • 25:03: there are 12 volts and so you get accumulator flashlight and will not be spend additional money element feeding but by itself this converter consumes very a small amount of current so even if use disposable batteries you have to replace them every few months now we We run our scheme Now the mid-point windings and connections we've got plus power and Metropolitan have negative
  • 25:33: you are welcome LED we I fired up minute remove light to be seen LED illumination It works perfectly I remind you of one batteries by the way if connect two let those batteries the finger or minipalchikovyh the the glow will have two more way batteries
  • 26:06: You must be connected successively to our scheme I worked ask much more vivid output current of the scheme is only 10 and 15 can maybe less Well, I personally milliamps not tested suitable for food
  • 26:36: one or two LEDs Of course it is possible and More LEDs connect with recalculation number of turns reason diameters transformer the use of more power transistor in my case, of course It is no more powerful meaning we can remove this scheme is quite good output current that will allow connect LEDs capacity up to polvatta Well today probably all the way, if the scheme
  • 27:06: wet course in later we We talk about it can be straightened voltage collector diode Schottky put smoothing condenser through restrictive Let the current resistor on LED as we know LEDs are powered her stress and more than in the current Ducks need to choose count immediately need for LEDs is you You can do for
  • 27:36: a special program or systems online calculation I remind you that the site iron has very convenient system how to calculate the restricting resistors LED and so for connection resistors parallel consistent connection All this of course will link you You can find a link under the article and we are waiting together with you given further rollers future I will speak already about network units
  • 28:07: about Chinese food products in particular LED consider a few The design is simple simple fixtures mains 220 V then to move on to more complex unit power that intended for high-power LED matrices example here But of course such it will all be Further rollers and Today I am with you goodbye until we meet again subscribe to wait for new channel rollers all of