EEssential

I wrote about the  AN8008 multimeter .  I have been generally happy with the meter.  But more recently, I started to notice some problems: t...

I wrote about  Atomic Pi  about two years ago.  Recently, I started using it again as a desktop computer.  I like it for the quietness witho...

I have a couple of old routers that have been replaced by more advanced ones.  So it is time to hack them for other use.  A wireless router ...

  The crank is a 3-phase alternator driven by two-stage gears; the output is rectified by 6 diodes.   There is another diode between the bri...

In the case of the RS422 circuit, the differential line impedance is around 100$\Omega$ and "Standard RS-422 drivers are guaranteed ...

I have a string of 60 LED Christmas lights with 6 distinct colors.  I measured the RMS current with a multimeter, and found to be 27mA, so i...

 Many automotive grade chip film resistors have the  anti sulfur feature.  Bourns has a white paper, "Advantages of Sulfur-Resistant Fi...