This oscillator was found in a 1976 documentation. The no specified components indicate circuit timings in the range of 150 ns to 120 seconds. The supply must be made with 5 V.
This circuit uses a JFET CA3140 operational amplifier to convert a low frequency sinusoidal signal...
This commercial radio for the AM band was sold in Japan in the 1960s. The circuit has an IF of 455...
In the figure we have a simple way to produce tone in a piezoelectric transducer. The frequency depends...