Bench thermometer (CB20501E)

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

SPM LR Inductors for Power Circuits (COM010E)
I can be obtained from Mouser Electronics the new TDK inducers SPM-LR series to currents from 1.3...
Audio Decoder (CB3963E)
The purpose of this circuit is used in communications and to respond to signals that are in the 2...
Moisture Detector (CB5367E)
We found this circuit in an 80's Radio Shack publication. The circuit uses a company buzzer, but...