Automotive Fuse Monitor (CB26299E)

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

9 W amplifier (CB18562E)
This 9 W amplifier with transistors from the 60's was found in documentation of the time. The...
Cycloid adapter (CB6908E)
The purpose of this 1965 Radio Electronics circuit is to observe cycloid waveforms on a standard...
Light Alarm (CB24237E)
In this circuit found in the December 1972 Radio Electronics magazine. R can be from 1k to 22k,...