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.
The transistors for this circuit from an 80's documentation can be the BC548 or 2B222 and the...
In the figure we show a timer, which is simpler because it uses only one of the four gates of the...
This circuit checks the infrared emission of a common remote control. We found it in the March 1993...