Found in the November 1999 issue of Electronics Now magazine, this circuit generates a 6.67 Hz signal from a 4.1952 Hz crystal.
This relay circuit protects against accidental inversion of input polarity. The circuit was...
This 80's National Semiconductor circuit uses an era integrated circuit and symmetrical 5V power...
This circuit was obtained from Popular Electronics from March 1967. The transistor used is from...