This is yet another balanced modulator circuit for SSB transmission. This two-diode circuit was found in a 1980s documentation. The diodes are commonly used.
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...