This decorative object was found in a Signetics documentation from the 60s. The circuit uses neon lamps and must be powered by a high continuous voltage. The current is extremely low.
This simple metronome, from 1985 documentation uses only transistors and has two settings. For...
This circuit is suitable for modulating AM transmitters. The circuit is from a 1977 radio amateur...
This flasher was found in an old Hands On, but uses common components. The optocoupler can be...