Found in a 1968 US publication, this circuit can operate on any power grid. The thickness of the wire depends on the load current.
When the power is turned on, the output of this circuit goes to the “1“ logic level by a time...
This circuit was found in an old manual of linear integrated circuits of the 80's. Equivalent...
This is the normal circuit of a relaxation oscillator using an unijunction transistor such as the...