This circuit was found in the March 1982 Radio Electronics magazine. The component is a special circuit that generates programmed melodies selected by the switches.
The components of this circuit from the 70's are no longer common on the market, but it is...
This circuit produces rectangular and triangular signals using two 741 operational. The source must...
The basis of this 90s circuit is a CA3130 operational amplifier. The circuit does not need a...