Clinical thermometer (CB7244E)

For measurements between 30 and 40º C this circuit was found in the documentation of 1968. The sensor is a difficult component to obtain today.

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Light operated switch (CB6856E)
This circuit is from American documentation from the 1980s. The transistors are general purpose...
DC Motor Control Stage (CB12355E)
This control stage or shield can be used with motors from 3 to 12 V and currents up to 3 A....
Electronic Dice with the 4018 (CB4630E)
A recreational application of the 4018 is shown in the figure in which we have electronic dice....