This speaker overload protection circuit was found in Radio Electronics from the 1980s. The circuit uses a 9 V relay but can be powered by 12 V for a relay of this voltage.
This traditional oscillator uses two complementary transistors to produce low frequency signals....
This oscillator produces a rectangular signal in the range of 100 Hz to 1k Hz but with the change of...
This electronic “windsock” is operated by a magnetic switching system. It was found in a Radio...