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This binary to decimal converter matrix was found in a 1964 General Electric publication. It can be used on modern equivalent circuits, including as a shield.
Using SCRs, this circuit from a 1967 General Electric manual allows full wave load control with SCRs....
This interesting circuit from a publication from the 1970s, measures the intensity of the sound...
This simple NPN and PNP transistor tester configuration can use the low current range of a common...