100 mA regulator (CB21168E)

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

Car Radio Switched Regulator (CB15133E)
This high-performance circuit was found in the 1982 SGS Linear Integrated Circuits Manual. The...
Radar detector (CB8628E)
Found in a 90s Electronics Engineering, this circuit makes use of components of the time. The...
10-minute timer 555 (CB9368E)
Found in a magazine 73 for radio amateurs, this circuit has two settings, one for the interval and the...