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.

Digital Moisture Meter (CB25144E)
This digital indicator circuit was found in the June 1988 issue of Radio Electronics magazine. The circuit...
Powerful Amplifier (CB18826E)
This powerful amplifier with 2N3055 transistors at the output provides a few tens of watts rms on a...
CMOS logic test (CB8910E)
This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of...