100 mA regulator (CB21168E)

This 2-terminal regulator was obtained from a 1990s National Semiconductor manual. The components admit modern equivalents.

Component Tester (CB4313E)
This circuit consists of a simple continuity test with two transistors forming a relaxation...
100 W Inverter (2) (CB13974E)
This circuit is a manual of 1972 RCA power transistors. The critical components of the project are...
High speed trigger (CB21850E)
Found in the 1974 Ferranti transistor manual, this Schmitt trigger circuit uses general-purpose transistors...