This circuit, which appears elsewhere on this website, was obtained from 1967 General Electric documentation. All semiconductors used are uncommon today.
This circuit is from a 1995 publication. The components are all common and the number of LEDs may...
This circuit, found in a 1995 documentation, is intended for switching composite RGB video signals...
This circuit is from Motorola's Linear Interface ICs of 1993. The integrated circuit is not common...