Found in a magazine 73 for radio amateurs of the 90s, this circuit converts a continuous voltage and another continuous voltage, but with insulation between the circuits.
This high-power transistor amplifier was found in a 1995 documentation. The source is given in the...
In this circuit of a 1970s publication, data from the coil to oscillate at the desired frequency...
This circuit was published in an English magazine from 1980. The magazine no longer exists, but...