Level indicator (CB23803E)

This neon lamp level indicator circuit uses low voltage power supply. The circuit was found in a February 1962 Radio Electronics magazine.

Tilt indicator (CB9492E)
This indicator circuit used and game machines (arcades) to indicate that the machine is being...
Silk Screen Printing Timer (CB4652E)
If the reader still uses silk screen printing tables this is an interesting circuit found in a 1994...
Common Emitter Stage (CB22224E)
This amplifying step was found in an old American publication. The transistor is made of germanium and...