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 fires at the touch of a sensor, passing its output from high to low in a time given by...
An interesting and versatile filter circuit, suggested by National Semiconductor is the one shown...
The project that we present below is very interesting, serving to identify remote calls such as in...