Found in documentation from the 1980s, this circuit uses a SG1524. It is an uncommon integrated circuit nowadays. The circuit provides a current of 20 mA with a symmetrical voltage between 15 and 18 V.
Found in 90s Radio Electronics, this shield can control high voltage loads in the power grid....
This interesting 80's logic circuit consists of a gate that can be programmed according to the...
In this circuit of an American documentation of the 90s, when the light is cut, we have the...