Why Is the Current Limiting Resistor After the LED in the Below Video? Shouldn't It Be Before?
LEDs are current driven devices. An anerage indicator LED can take up to about 25 mA and will drop about 1,5 volts depending on its colour. To ensure that the current does not exceed its maximum rating you need to drop the supply woltage to around 1.
5 volts with a resistor. If your supply is 5 VDC, you need to drop 51. 5 3.
5 volts. The resistor would then be R E/I 3. 5/0.
025 140 ohms. I would prefer to run at a lower current of 10 mA The resistor then would be 350 ohm,a. (I would choose preferred val;ue of 360 ohms)
· Related Questions
What would happen if Lisa Nandy led the Labour Party into the next election?
Difficult to say for reasons I will explain. But she would be more of a threat than Continuity Corbyn candidate Beccy Wrong Daily.Nandy gives the impression she has thought on things a bit more than the standard hard leftie, riddled with a Marxist ideology.
But. . .
She is only 40 has not done much, so may be another know nothing. It depends very much on who is behind her, that would provide the know how and resources.Since she is not the Momentum candidate they will soon target her with abuse, disinformation and slurs.
The hard left can be particularly nasty, not adverse to violence, anti semitism and misogynyGood luck with all of that
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What led to the fall of the East India trading companies?
east indian company was a company that was money centered and always was cruel toward indian they make misuse of india they first destoryed the indian market and make indian weaver to cry for a pennythen afterward when they started trading in indigo they forced indian farmers to grow indigo due to which scarcity of food caused faminesmany rules of lord curzon were the great problem due to which many wars were fought by indian ruler and protestant after which SWADESI moment SIMON ,BOYCOTT and making khadi and wearing made a large market of east india company in a great loss led to the fall of east india company
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Would Japan, Korea and Australia, Singapore, Philippine abandon USA and join into China led Asian Military Alliance akin to NATO?
First of all,Who wants to give up an alliance with not just the American military, but also the thousands if not millions pumped into the economy by the American naval fleet stopping at your harbour?
These guys need food, maybe a walk around and stuff like that.Secondly, even if there were a Chinese military alliance there's nothing that prevents us from being in two alliances at the same time. Singapore can be an ally to both Malaysia and Britain, whos to say it can't be an ally of both America and China?
(As a matter of fact we are).
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Is Donald Trump correct when blaming Barack Obama for problems that led to slow distribution of test-kits for coronavirus (COVID-19)?
Is Donald Trump correct when blaming Barack Obama for problems that led to slow distribution of test-kits for coronavirus (COVID-19)?
No.Hes lying.Trump himself eliminated regulation that the Obama administration put into place to make distribution of things like tests kits and vaccine faster and more efficient.
As is typical for trump, rather than take responsibility for his own shortsightedness he chooses to blame others. Trump is pathologically incapable of accepting responsibility for his mistakes.He knows its ok though.
His supporters can be counted on to take his word for it and not fact check or verify his claims
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Why has Led Zeppelin never reunited?
One of them is dead. So there's that.
One of them has a fairly commercially and critically successful solo career, so has no real incentive to revisit the stuff he wrote 40-odd years ago.One of them never really got on that well with the others, and is also happily doing the music he wants to do, which isn't Zeppelin.Tours are not every band's favourite thing.
Living in buses and hotels for months is not what what every septuagenarian rocker wants for his twilight years. Demand for a reformed Zeppelin would take that tour to he'll and back for three nights at every stop along the way. None of them need the moneyu2026They eru2026 did reunite for a tour in 2007.
It was pretty good, apparently.
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What factors led to famine in the Soviet Union?
Communist policies of forced collectivization.
Terror unleashed against enterprising peasants by Red troops , detachments of secret police, agitators, and their allies amongst the laziest villagers. Envy towards those who work hard by those who want to redistribute. But peasants fought back, in local uprisings and by killing communist tormentors.
Those who survived retribution were sent to concentration camps; exile in Siberia. In Russia, Ukraine and other parts of the USSR, this artificial famine devoured the peasants and more. We lost millions in Ukraine alone.
My grandfather witnessed how red troops were killing peasants trying to get into Kiev. And because of the Soviet policies of famine , my country experienced cannibalism. And the vile NYT covered up thus famine.
Bloody bootlickers of totalitarianism socialist regimes.
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What led to the end of the reign of Cyanogenmod?
Well, CyanogenMod is not dead but Cyanogen OS is indeed no more from 2017.
CyanogenMod will be rebranded as Lineage OS. All this yes due to their primary objective to take android away from Google which was creating a bad name for CyanogenMod. Steve Kondiku2019s initial aim for creating Cyanogen Inc.
was to spread CyanogenMod to more people and after their initial success, Kirt McMaster started saying those stuff, and hence going off their initial aim. Recently Steve Kondik left Cyanogen Inc. and is breaking all ties with it.
The problem with that is that Cyanogen Inc. has control over some of the brand and trademarks around Cyanogen and CyanogenMod, and so the whole thing will likely have to be forked and rebranded, at least according to Kondik
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In World War I, in 1916's Battle of Verdun, what led Germany to abandon its nine-month campaign to "bleed France white"?
It was a strategy of attrition that Germany was not in a position to use effectively given their fewer resources and manpower compared to the Allies.
Their campaign did not work and it was bleeding Germany too much. The German Crown Prince started opposing the strategy. In the meantime, the British launched the Battle of the Somme to relieve Verdun.
Although the Somme Campaign failed to push forward and cost many British casualties, it succeeded in relieving Verdun and chewing up German lives. Overall, WW1 on the Western Front favored the defensive. In 1916, the Russians were tying up many German and Austro-Hungarian resources
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What was Led Zeppelin's best concert?
Many people point to MSG 73 because they've seen it on the SRTS film but the band were tired at the point of filming. Others say Earl's Court was the pinnacle and as a visual spectacle that may be true but in reality the heroin already had a tight grip on Jimmy and it was reflected in his performance which left much to be desired. Plant was on good form with his story telling but hus voice was shot.
For me if you want to hear them at their peak then listen to their Japanese tour or the Orlando bootleg
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What were the possible reasons that led to cancellation of PM Nawaz Speech?
There are many reasons1 - Pakistan don't want to give out statement against Iran or at least in favour of Iran in a group of countries where everyone is against Iranians.2 - Trump is India strong Allie and have strong ties with modi probably due to both antimuslims stance.
So Pakistan cannot say anything to USA or any other country in the group as it would have resulted into isolation of Pakistan. .3 - Saudi king invited only for visit not for speech as , if Pakistan was participating , people would have regarded them as isolated and Indians of course would be happy as they got tit for tat in the One belt road forum in Beijing4- according to PM Nawaz , the conference started 45 min late , due to time shortage , he didn't spoke
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Why do depressed people feel less emotions?
Why has depression led me to have no emotion?That numb no-feeling is a symptom of depression. When I was depressed, I used to alternate between feeling intense psychological pain and feeling nothing at all.
If you are not being treated for depression, it is very important that you change this. Depression and numbness dont go away on their own. The treatments for depression are effective, and once they start to work, you will notice that the numbness subsides and a range of emotions returns.
Please talk to your doctor about how you have been feeling.
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Did the hard Brexiteers led by ERG overplay their hand?
No.
Its necessary for the UK to escape the EU. Of course try to minimize the costs despite spiteful efforts of the bureaucrats in Brussels. But even a hard Brexit is better than remain.
Pause a moment and see how weak the hand of Germany/France. Other nations are stressed and will have to leave as well. UK is a net contributor to the EU and so will be sorely missed.
The rational thing for the EU to do is negotiate a decent parting. But as with all human divorces, Macron and Merkel cannot escape their anger.Why is that?
Because humans cannot escape the primitive thinking fast part of the brain, the one that trades in envy and greed. See here: Thinking, Fast and Slow By Daniel Kahneman Book Review
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Can I use a 110V LED lamp on a 220V socket?
Id say NO!
It will probably fail immediately, possibly with fire and smoke. It may work, but fail later, when youve left the room, with fire and smoke.It is also not guaranteed to be insulated properly for 220V and you could get a shock.
I actually think this is a very very rare probability, but you really dont want to take the risk. It may be marked with a safety mark, which has no meaning if you abuse the device by giving it double the voltage, four times the power
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How many major groups have covered the Led Zeppelin song 'Stairway to Heaven'?
There's a cover version of "Stairway to Heaven" in the style of the early Beatles by a group called the Beatnix.
Little Roger & the Goosebumps took the opposite tack by staying very close to the original tune and style of Stairway to Heaven but singing it to the lyrics of the theme from Gilligan's Island. It works surprisingly well, but the original 45 is a bit of a collector's item, because somebody got sued. Then there was a disco group called the Wonder Band that did a medley of Stairway to Heaven and Whole Lotta Love.
(No, really.) What can I say? It was the 1970s.
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Why did Austria-Hungary declare war on Serbia? What led to that decision?
There was a sense in Vienna that the Habsburg Monarchy was slowly slipping out of the ranks of the great powers.
There was a sense in some military and political circles that if the Monarchy didnt fight the Serbs *now*, its ability to do so later would decline. And, too, there were causes other than the support given by factions inside the Serbian military to the assassins at Sarajevo. There was ongoing Serb support to irregulars on the Bosnian frontier, there was the near-clash in 1913 over Serb efforts to occupy the new Albania, and there was the ongoing claim by Serb factions on Serbian-speaking territories (and Croat lands, too) inside the Monarchy.
There was a feeling that the Serbs would inflict a death of a thousand cuts unless they were punished *now*
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What are your thoughts on Led Zeppelin Three (1970 Album)?
It is a very satisfying listen on the whole and even though I really like the beat and guitar of Immigrant Song I actually am now sick of it and find it too repetitive. The other song I don't like that much is Since I've Been Loving You other than that I love the rest of the album.
I enjoy the crazy cover artwork and despite the two songs that annoy me I still say this album is among their very best work. It has a nice cohesion about it that the second album lacks
