Archive for the ‘Measurement, environment’ Category:

2022-03-05 Satellites Sense Huge Methane Leaks On Earth

The sensors on new satellites can sense huge methane releases on Earth.

2022-02-05 Global Warming Is Even Worse Than You Believe

This is very bad, indeed. More critical climate tipping points will be crossed in the next 3 to 9 years. We must act now! << Because we went over the [386 ppm CO2] climate cliff in 2015, and an average global temperature increase of 1.5 C also triggers runaway global warming, we now have to

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2021-06-14 Electric Vehicles Are In Stealth Mode

I have a PIR (passive infrared) motion sensing light on my porch for more than a year, and I’ve noticed that it can sense some of the cars that go by. If the car has been running, like coming home it will usually trigger the light. But when a neighbor starts the cold car and

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2021-02-10 EIA Short Term Energy Outlooks

A quote from << EIA forecasts that planned additions to U.S. wind and solar generating capacity in 2021 and 2022 will contribute to increasing electricity generation from those sources. EIA estimates that the U.S. electric power sector added 17.5 gigawatts (GW) of new wind capacity in 2020. EIA expects 15.3 GW of wind capacity

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2020-12-11 Chernobyl Cat Is Very Radioactive

Wow, listen to the meter go crazy when it’s near that cat! H-O-T-!!!

2020-05-01 UFO Detector And Sighting!

Photo from ?? Thanks, Mike Guerrucci. This is a simple device. That means it’s just a buzzer and a battery. And it has a super sensitive magnetic switch. This detector is always open until it is disturbed by a magnetic field. They call it a magnetometer. One way to make this is to use a

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2020-01-29 Fusion Thoughts About The Future, Pros, Cons

So many ideas about the future promises of nuclear fusion power, how it will affect the world. Will nuclear fusion ever become a reality? It remains to be seen. In the meantime we will have to make do with renewable energy, mostly wind and solar. The goal is to greatly reduce use of fossil fuels

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2020-01-13 Slide Rule and Calculator Battery

From FB group Jan 19 Joe Haupt In the ’80s I occasionally did work in an electrical room on campus that had a 7 foot slide rule that had been removed from the classroom. It was there for years, but the fire inspectors would make us keep the junk from accumulating in closets, so it

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2020-01-08 Sorting Transistors Compared to Picking Fruit

I started thinking about how the makers of transistors sort the different grades of transistors as they’re manufactured. I thought that a reasonable analogy would be similar to how a farmer might sort the fruit he harvests. Here’s what I came up with.The farmer starts with the fruit his workers have gathered.  The fruit is

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2018-08-20 2N3904s From Mouser And Ebay

from FB group Building Transistor Radios 2018-08-22 Olek Kopyto I recently did some tests on 2N3904s I got from Mouser and from a Chinese eBay seller. The ones from Mouser had a current gain of right around 200, right in the middle of the 100 to 300 gain range according to the data sheet. The

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