Automotive Fuse Monitor (CB26299E)

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

Gated CMOS 555 (CIR087E)
The CMOS TLC555 can be gated from external CMOS circuits using the configuration shown here. The...
Preamplifier with 741 IC (CB24944E)
In the figure we have a two-channel preamplifier with two 741 integrated circuits. The circuit is from a...
Self-powered radio (CB20515E)
We found this circuit in a documentation from the 50's. The transistors are germanium types. The...