This small commercial radio for the MW band with germanium transistors was found in Japanese documentation from the 1960s. The circuit is powered by a 9 V battery and has a 455 kHz IF.
This circuit was found in recent English documentation consisting of a small inverter capable of...
This 2001 circuit uses common transistors and can be used in an electronic lock. The relay trips...
This configuration is traditional and can be found in many other circuits in this section. The...