Some information on what current and resistors to use. The LEDs are all in parallel and need about 3 Volts, current limited with a resistor. https://www.facebook.com/reel/909951727389682?mibextid=9drbnH&s=yWDuG2&fs=e
Archive for the ‘Optics and Light’ Category:
2024-03-11 MethaneSAT Launched, Will Remotely Sense Methane Leaks
Thousands of abandoned oil wells leak methane and no companies will take responsibility. “”MethaneSAT has officially launched! Circling the Earth 15 times a day, this satellite will detect invisible methane leaks and enable emission reduction from the oil & gas industry.”” https://www.edf.org/methanesat
2024-01-10 SpaceX Satellite To Satellite Laser Links
SpaceX Reveals 8,000 satellite to satellite laser links. https://www.tesmanian.com/blogs/tesmanian-blog/starlink-video#:~:text=The%20’space%20laser’%20feature%2C,Gateway%20ground%20station%20on%20Earth.
2023-10-19 Falling Ceramic Particle CSP – 1000°C For 15 Hours
Ceramic particles the size of sand can get hotter than the oil used in parabolic troughs. Heat stored for use after sun sets. CSIRO Claims Falling Particle Concentrated Solar Power Can Lead To A Net Zero Economy
2023-08-23 Research On Advanced Techniques And Materials For EUV Lithography
Iteresting interview with a UC Berkeley scientist on their research with EUV – extreme ultraviolet – and developing materials for EUV lithography. One should be aware that when the structures of the chip are under 10 nanometers, if you were standing there looking at the structures on a table, the silicon atoms are about a
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2023-08-12 Moore’s Law Is Dead? – Sabine
Sabine Hossenfelder goes over the history and ways that Moore’s Law may still make progress. Also a few good comments.
2023-07-09 Groundbreaking Research Transmits Energy From Space To Earth
This is definitely groundbreaking. But I don’t understand why they’re doing it this way. I think the array that’s in space should be as simple as possible – an array made up of thin sheets of metallized mylar that reflect the sunlight to the photovoltaic array on Earth. In their system and mine, there has
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2022-04-07 Audible Light Meter
This circuit could be used for blind to sense light. It’s a similar circuit to the police siren. The two transistors have a current gain of 200 X 200 or 40,000 so even a very tiny Q1 base current – microamps – causes a very large Q2 collector current. So a very small amount of
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2021-10-09 Skycool Passive Cooling Radiates IR
This Skycool radiates InfraRed in the ‘window’ of 8 to 13 micrometers. He also talks about special coatings and paints. This technology sounds promising. I would like to know if there are plants or better, trees that have foliage that radiates in the same window. These could be grown to do double duty: sequester CO2
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2020-06-06 Clark Refractor Telescope At Santa Ana College
From FB comments June 6 David Wise I went up there on the roof of Russell Hall at SAC to do some work and I went into the observatory to see the Clark refractor telescope. Old timer wasn’t used because of the air conditioners running a few yards away, and the observatory door hinges were
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