Optical isolator (CB9165E)

This circuit was found on an old EDN and can be used as a shield. Optical couplers are from the era and modern equivalents can be used.

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Reset Pulse Generator (CB6615E)
This circuit is from Dutch documentation from 1967. The circuit works with a component of the...
Microcomputer Shield (CB4309E)
Originally in 1986, this circuit was developed to operate with microcomputers of the time like the...
Two Inputs Stepper Motor Control (CB23787E)
This circuit consists of a variation of the previous one, with the difference that we only have...