Automotive Fuse Monitor (CB26299E)

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

Booster for cassette player (CB22151E)
This amplifier for small cassette tape players was found in an English documentation from 1969. The...
TTL Optocoupler (CB17021E)
This circuit is intended to trigger a TTL door or flip-flip from a signal coming from an SCR....
Offset Adjustment Sample and Hold (CB5958E)
We find this circuit in a 1980s documentation. The circuit can be applied to modern operators with...