This oscillator produces a modulated signal using a unijunction transistor. We found it in an American documentation from 1965. The circuit modulates in frequency the generated signal.
This circuit is from an ancient American documentation. The coil is frequency dependent and the...
We found this circuit in a 90's Popular Electronics. The circuit produces a loud sound if S2 is...
This 2.2 Hz to 24 kHz filter was found in the February 1995 issue of Electronics Now magazine. The circuit...