This regulator circuit was found in the June 1984 issue of Radio Electronics magazine. The LM11 is a power operator. Voltage selection is done by a switch,
The automatic modulated siren circuit shown in the figure really produces an interesting sound...
This circuit for incandescent lamps was found in a 70s documentation. The circuit uses an SCR...
In the figure we have a circuit in which two moving bar/dot indicators are connected together to...