Archive for the ‘blog’ Category:

2024-12-08 Derek Veritasium – Game Theory, Which Strategy Wins

Very interesting.  So iets & nuclear bombs as first example.  Then after many rounds of game to see which strategy works best.  https://www.facebook.com/veritasium/videos/2169334116741310/?mibextid=9drbnH

2024-11-29 The Knack – Overengineering

Yeah.  Okay.

2024-08-25 Musk Shows Video Of Cortex Supercomputer

This is the link to a tweet on X from Elon Musk that shows an 18 second video clip of the “Cortex” data center at Gigafactory Texas.  We have not seen any of the hundreds of racks of computers shown in this clip being delivered and installed st GF Texas.  Therefore I stated that I

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2024-08-21 Adjustable Power Supply Uses Sziklai Pair

This messy bunch of parts is a 0 to 9V adjustable power supply.  The original power supply board connected the two transistors in the Darlington Configuration.  The unregulated 12V input goes through a 187 ohm resistor to a 10V zener diode to give a stable reference voltage.  This voltage is fed to a 2.5k linear

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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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