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LED driver does not present a problem.txt

 
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rtrqdc69




Dołączył: 24 Maj 2011
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PostWysłany: Nie 2:34, 29 Maj 2011    Temat postu: LED driver does not present a problem.txt

Led so the measurement of the optical parameters of the first led should be considered in setting the conditions for the work tocarry out a junction temperature. in addition, led technology for packaging, materials and other differences, the claimed maximum operating junction temperature is significantly different, [link widoczny dla zalogowanych] in order to ensure a highly efficient led lighting products, the characteristics of long life, led junction temperature of the actual work should be significantly lower than the maximum operating junction temperature .
constant-current test open circuit voltage of the power can not be too high to prevent led pulse voltage by the impact of negative feedback and failure. (2) form to the human body with astatic situation in several states, from which is easy to see under the same conditions, humidity rise, reducing the electrostatic potential u, [link widoczny dla zalogowanych] which reduced the risk of esdlower, but stillexists, therefore, not relax static protection, to maintain good work habits.
led with constant current characteristic control device of thebiggest feature is to watch from the input side, with a high output impedance,[link widoczny dla zalogowanych] connected in its output a series of led, as long as the series of led forward voltage accumulated value does not exceed the maximum output voltage, in this context, several ledstrings or less more than a few led strings.


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wywm299471




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PostWysłany: Pią 11:49, 14 Paź 2011    Temat postu:

In all the world, searching it up and down, So equal were they all, from heel to crown, There were no two such bands in any way. For there was no man wise enough to say How

either had of other advantage In high repute, or in estate, or age, So even were they chosen, as I guess. And in two goodly ranks, they did then dress. And when the name was

called of every one, That cheating in their number might be none, Then were the gates closed, and the cry rang loud: "Now do your devoir, all you young knights proud!" The

heralds cease their spurring up and down; Now ring the trumpets as the charge is blown; And there's no more to say, for east and west Two hundred spears are firmly laid in rest;

And the sharp spurs are thrust, now, into side. Now see men who can joust and who can ride! Now shivered are the shafts on bucklers thick; One feels through very breastbone the

spear's prick; Lances are flung full twenty feet in height; Out flash the swords like silver burnished bright. Helmets are hewed, the lacings ripped and shred; Out bursts the

blood, gushing in stern streams red. With mighty maces bones are crushed in joust. One through the thickest throng begins to thrust. There strong steeds stumble now, and down

goes all. The Canterbury Tales The Canterbury Tales 54One rolls beneath their feet as rolls a ball. One flails about with club, being overthrown, Another, on a mailed horse,

rides him down. One through the body's hurt, and haled, for aid. Spite of his struggles, to the barricade, As compact was, and there he must abide; Another's captured by the

other side. At times Duke Theseus orders them to rest, To eat a bite and drink what each likes best. And many times that day those Thebans two Met in the fight and wrought each

other woe; Unhorsed each has the other on that day. No tigress in the vale of Galgophey, Whose little whelp is stolen in the light, Is cruel to the hunter as Arcite For jealousy

is cruel to Palamon; Nor in Belmarie, when the hunt is on Is there a lion, wild for want of food, That of his prey desires so much the blood As Palamon the death of Arcite

there. Their jealous blows fall on their helmets fair; Out leaps the blood and makes their two sides red. But sometime comes the end of every deed; And ere the sun had sunk to

rest in gold, The mighty King Emetreus did hold This Palamon, as he fought with Arcite, And made his sword deep in the flesh to bite; And by the force of twenty men he's made,

Unyielded, to withdraw to barricade. And, trying hard to rescue Palamon, The mighty King Lyburgus is borne down; And King Emetreus, for all his strength, Is hurled out of the

saddle a sword's length, So hits out Palamon once more, or ere (But all for naught) he's brought to barrier.


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