Archive for the ‘Security and Safety’ Category:

2024-04-20 RCWL-0516 Microwave Doppler Motion Sensor Module Schematic KO4BB

The modules use both the RCWL-9616 and the BISS-0001 but it seems the schematics are all labeled BISS-0001.  The parts values are different.  He gives some good information about them.  They operate at 3.5 and 3.98 GHz – the ones I have were advertised at 5 GHz.  Also he shows his own version that uses a

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2024-04-16 White Vinegar Isn’t Neutralizing NiCad Electrolyte

I put white vinegar on the areas where the NiCad juice turned the PCB green, and it didn’t seem to do anything.  So after awhile I washed it off with plain tapwater.  I used a soft brush and a lot of the green coating washed off.  It’s not in very good shape.  I’m wondering if

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2024-03-19 Turn Off Facebook Settings

I’m still trying to figure out what good it will do. https://www.facebook.com/reel/1346635789305871?mibextid=9drbnH

2024-03-09 Big Clive’s Old Tungsten Roadwork Beacon – Barricade Flasher

I built this “tungsten roadwork beacon” as Clive calls it, using the parts given in my schematic (photo below). I didn’t have a 6V, 90 mA lamp, so I simulated it by using three 20 ohm, 1/4 Watt resistors in series, which gives 60 ohms and 100 mA load with 6VDC.  For an indicator I

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2024-01-20 Subtropolis – 55 Million Sq.Ft. Salt Mine & Underground Storage Facility

Subtropolis is 1100 acres underground cave left over after the salt was mined. https://www.facebook.com/reel/302691279431108?mibextid=zAoTV8&s=yWDuG2&fs=e

2024-01-11 Almost 2.5 Million Title 42 Expulsions In Biden Administration

The claim that the President isn’t doing enough to protect our border is bogus. The Biden administration has expelled almost 2.5 million under Title 42.

2023-11-26 Kirschner Predicts Judge Chutkan Will Put Convicted Former President In Jail

Ben Meiselas plays an interview of former federal prosecutor Glenn Kirschner by Michael Cohen on the blue Mea Culpa channel. Kirschner Predicts Judge Chutkan of the federal prosecution of Trump in Washington D.C. for the federal classified information crimes. Kirschner also said he believes Trump will be sentenced to life in prison, and no deal

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2023-11-14 Amsec, Gary Lorenz, John Darjany – history of campus card

I finally found a bit of history about Gary Lorenz. He and I were high school friends. In 1972 he and John Darjany founded a company, Amsec, to make a “campus card system” for California Polytechnic University, Pomona. In 1974, Amsec was purchased by R.D. Products. A brief history of the campus card industry This

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2023-09-01 California – Putting Solar Panels Beside Highways

I definitely think that the vacant land is a good location to put solar panels. Another is to locate the panels on canopies that cover spaces in parking lots. One problem we had was vandals. There are electric gates along the bike trail and gates are run by a solar panel. The panels were on

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2023-08-11 Hybrid, Gas Cars Catch Fire The Most

There is so much bad press in the newsmedia about EV fires. But the worst by far are hybrids, then regular gas guzzlers. EVs are a very tiny fraction of the total. Gas cars catch fire 200 times more often than EVs. See image.

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