100 mA regulator (CB21168E)

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

Field Strength Meter (CB6539E)
Found on an 80's Elektor, this circuit uses common components, being the diode a general purpose...
Microwave Oscillator (CB21748E)
This 1.6 GHz oscillator with 40 mW of output power was found in a Popular Electronics from...
Audio Oscillator 4049 (CB8794E)
Found in a 90’s Popular Electronics, this circuit uses two CMOS inverters to generate a signal of...