Some Questions About LED Answered

Here are top 10 questions about LED asked by people online.

1. Drive a 3w led with a 18650 li-on battery

A buck-boost regulator will give you constant brightness and constant current but involves more design.A Thermal sensor that rises in resistance with temperature will work well with the right part.I would choose a 350mA to 500mA PTC and attach it to the LED heatsink. They are rated by Holding current and trip current is 2x but if also heated by LED, it will trip earlier depending on thermal design.Given the wide variation in Ri (internal resistance) of the 3W LED from 3.2-3.8V If * R1 for Ri = 0.8 to 1.2 adding 0.5 parts in series/parallel as battery drops in voltage then bypass. Normally a 3W LED is Ri= 1/3 . Your specs may vary but it appears to be a 1W LED with 3W pulse capability. 2.6V is dim 2.8V is 10% max current.simulate this circuit - Schematic created using CircuitLab

2. Can Australia avoid an economy damaging Shorten led government?

Probably not unfortunately, because Australians seem to have short memories and vote for whoever they perceive to give them more handouts.Whilst the coalition has its problems the thought of a Shorten government is frightening. He is just a union puppet that has no concept of reality.

3. Has skepticism by and in itself led to any reasonable scientific breakthrough?

Skepticism is often associated with "anti-science", the scientifically illiterate, from souls who do not get the "power" of science.Skepticism, should also be prevalent and forever in the minds of practicing scientists and engineers. Engineers ii have found are generally more skeptical than scientists. . about their own work. Engineers make life and death decisions, and power fiscal innovations. They are motivated.Scientidts give self reflective skepticism at most lip service. They can criticise everybody's life endeavours but their own. It really is a narcissistic cult. So. I made a very significant scientific breakthrough because of my discomfort with science group think, cult tactics, old boys club behaviour. And those ermine cloaks make me want to vomit.Any enterprise that makes the descendants of genecides survivors walk past and listen to the adulation for the freaks responsible for massacre of their ancestors has to be seriously ed up in the head and soul. And they still are. . give back the Chagos archipeligos. That's my motivation for skepticism, there's no way these devils got the science right.Anyway, I felt uncomfortable with the laws of diffusion. I was very skeptical about two separate laws. So I wrote it so they make sense as compliments. Then I saw the equations for mass in the diffusion equations. And wrote that.I am writing a short letter for the mass of the electron. I figured it iut. Hope to have it out by the end of the year. Probably could by Friday, but really it's no big deal.What is the great accomplishment. I put quatum mechanics and mass and the potential for new discoveries in the hands of high school students. Sort of like the Guttenberg press of science. The way I presented the mass definition really does not take much training to understand. It takes the power away from elitists and gives it to youth. Really I expect highschool science projects to come up Nobel worthy discoveries. You can do it.The whole cosmos of science is open for discovery and rediscovery.That's what I think anyway.Anyway yes. Skepticism does generate breakthroughs, but not necessarily the way we would expect. Anyway, my position is, there's no way intellectual cretens can get the science right. Lol. I am not saying I am right, it's just the position I hold. So far it's served me well

4. What is the reality of the BJP led Maharashtra Bachao Andolan?

Maharashtra Bachao Andolan is a protest by BJP citing the failure of Maharashtra govt in handling corona cases in the state. This protest was lead by former chief minister Shri Devendra Fadnavis. Maharashtra has seen the biggest spike in number of corona cases in last 2 months despite of lockdown. Maharastra crossed the mark of 40,000 cases on friday with mumbai alone contributing 25,000 cases with maharashtra having 2940 new cases and 64 deaths on friday. Dharavi which is the one of the largest slums of asia havs been severely affected by the corona cases with 1,578 cases yesterday. Citing these failures of the government of Maharashtra BJP started the 2nd phase of their protest, Opposition leader Devendra Fadnavis had said that party leaders and activists would hold protests by placing placards outside ministers' houses across the state. Along with this, people will register their protest against the government by wearing black clothes or wearing black stripe, making two yards in their courtyard on the roofs of houses.Other than that they also pointed out the negligence of Maharashtra govt in providing healthcare services to people of the state. He tweeted:Maharastra has been crushed by the coronavirus and the CM is busy in filing nomination for Maharashtra Legislative Council polls. And when a meeting was called by the Governor of Maharashtra he skips itThis behavior toward a pandemic by the person whose state has devastated by the virus is totally unacceptable