The values of the indicated components in this circuit of a 1967 Electronics World, are for a frequency of 512 kHz. The power can be between 6 and 22 V and the FET is a general-purpose type.
This control circuit or reversible contactor was found in a 1967 General Electric manual. The...
This is one of the many versions of amplifiers with LM386. This was achieved in an old publication (1981). The...
This two-phase stepper motor circuit was found in an old documentation using an operational amplifier...