This sophisticated audio generator with digital display was found in the March 1984 issue of Radio Electronics magazine. The circuit includes a power supply with various voltages.
This circuit with an integrated circuit of the time was found in the magazine Radio Electronics of April...
This is a converter stage found in old transistor superheterodyne radios. The circuit is for...
In its original version of a 70s manual, this integrated amplifier, which is uncommon today, was...