Bench thermometer (CB20501E)

With an ultra-low consumption, this circuit can be powered by solar cells. The circuit is from a 1991 documentation.

Quick Start Siren (CB25765E)
We found this circuit in the October 1994 Electronics Now magazine. The CMOS IC is uncommon these...
LED Scale Transducer U237B (CB25441E)
This circuit with a component from the time was found in the Radio Electronics magazine of...
Fuzz 5 (CB4875E)
This fuzz circuit is more elaborate with the previous ones, as it has a selection switch that...