Automotive Fuse Monitor (CB26299E)

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

OR gate LM3900 (CB14200E)
We found this setting in the National Semiconductor Linear Applications Handbook. The base is an...
Transistor Flip-Flop (CB19897E)
This conventional flip-flop configuration with two transistors was found in documentation from the...
Flame Detector (CB17547E)
This circuit is intended to monitor the flame of gas heating systems that must always have a small...