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.

Bicolor LED VU (CB16449E)
Based on the well-known LM3914, this circuit has a transistorized and inverters stage, triggering...
Analog to Digital Converter (CB21841E)
This circuit was found in Ferranti's 1974 transistor manual. Transistors are general purpose types...
Charger with battery status indicator (CB21566E)
Based on Texas Instruments documentation, this circuit is based on the BQ2000 a circuit used to...