This traditional dimmer configuration for incandescent lamps and heating elements was found in an RCA transistor manual. SCR can be a more modern equivalent like TIC106, depending on the power grid.
This circuit with the 555, was obtained in a 90s American documentation. The signal must be...
In the figure we have a simple and efficient way to obtain rectangular signals from an astounding 555...
This is the traditional Hartley Oscillator configuration for high frequencies. For 1 MHz wind 80...