This circuit, which appears elsewhere in this section, is from a 1969 Electronic Experimenter Handbook. The circuit uses components that are still common.
This circuit is from a Popular Electronics from the 90s. The integrated circuit admits equivalents...
This circuit, which can act as a shield, was found in an American documentation from the 90s. The...
This circuit regulates the alternating voltage of a load at 100 V. The circuit is from Motorola,...