4093 Sine Square Converter (CB26335E)

Found in a Popular Electronics from the 90s, this circuit operates up to about 5 MHz input.

Audible Direction indicator (CB7116E)
Found in a Popular Electronics from the 90s, this circuit uses a double 555 to emit beeps when the...
1A voltage follower (CB21073E)
This circuit was obtained from National Semiconductor documentation from the 1990s. The circuit has a...
RF Monitor (CB21686E)
This RF monitor or field strength meter can use instruments from 100 uA to 1 mA full scale. The...