PC address decoder (CB20536E)

This TTL decoder circuit for PC ports was found in a document from 1992. The power supply can be PC's own circuit.

Sinusoidal Oscillator (CB8422E)
Found in a 90s Popular Electronics, this circuit provides sinusoidal signals at frequencies given by the...
MAX4007 Nano Power Operational Amplifier
April 2017 - Mouser Electronics already has the MAX4007 from Maxim Integrated in its inventory, an...
Film marker (CB8347E)
Used with old projector films, this circuit found in Signalite documentation from the 1980s,...