This sequential circuit of LEDs was found in a Popular Electronics from the 90s. The circuit can be programmed and an adaptation consists of using optical couplers to drive power loads.
The simplest flip-flop can be built with two NAND gates as shown here. This is a Reset-Set [S-R]...
This circuit is suggested by RCA and is based on a dedicated integrated circuit that is the...
June 2017 - Vishay Siliconix's new Generation IV (Gen IV) Channel N MOSFETs can now be purchased...