This circuit, which can act as a shield, was found in a 1970s American documentation. The configuration can be applied to modern equivalent integrated circuits.
This oscillator can be used to generate sinusoidal signals from less than 1 Hz to close to 20 kHz....
This small commercial radio for the MW band with germanium transistors was found in Japanese...
Found in Radio Electronics magazine, May 1987. It triggers a xenon lamp from an inductive sensor. The...