Neon Fuse Blown Monitor (CB24104E)

This circuit was found in the January 1971 Radio Electronics magazine. It keeps the light flashing if the fuse blows.

Locked Alarm Using SCR (CB19222E)
We found this circuit in an American publication from the 90s. The power must be 2 V more than the...
High-gain amplifier (CB9019E)
Found in old American documentation, this circuit makes use of operational amplifiers from the 70s...
5-LED Driver U2X7B (CB25439E)
This linear LED scale circuit was found in the February 1992 issue of Radio Electronics magazine. Note...