Automotive Fuse Monitor (CB26299E)

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

LM317K Regulator (CB24817E)
We found this variable regulator circuit in a Radio Electronics issue from July 1984. It is one of...
High Impedance Instrumentation Buffer MC4741 (CB15268E)
The MC4741 consists of a quadruple 741. The power supply must be symmetrical, and the resistors must be...
Three-phase motor control (CB7268E)
Suggested by Sprague in the 1980s documentation, this circuit can control three-phase AC motors....