Automotive Fuse Monitor (CB26299E)

We found this simple car fuse monitor circuit in a William Sheets. The LED lights up when the fuse blows.

Capacitive discharge ignition (CB24182E)
This circuit is from a Radio Electronics from April 1972. The circuit uses power transistors of...
Sinusoidal to Square Converter (CB17472E)
We found this simple circuit in a 1999 documentation. It converts low-intensity sinusoidal signals (a...
Plasma Lamp (CB26130E)
This very high voltage circuit was found in the 1990 special issue of Radio Electronics...