This circuit was found in documentation from the 80s. It is based on unijunction transistors not very common today being synchronized by the 60 Hz power grid.
In this very simple circuit, the LED flashes at a frequency of 60 Hz. It is convenient to check the...
We found this oscillator that can supply up to 3 A of output in the 1982 SGS linear integrated circuit...
In the figure we have an old circuit of a crystal oscillator modulated by an audio signal. The...