This is the circuit of a European commercial amplifier. It was published in Radio Electronics magazine in September 1958 and has a power of 5 watts with good sound quality.
This two-transistor emitter-coupled oscillator circuit with capacitive feedback was found in the...
This simple circuit produces sound effects given by the 4093 oscillators and switches LEDs...
This circuit uses two sensors that are placed at the intersection of a miniature railroad, causing the LED...