We found this circuit in a documentation from the 90's. The coil has its characteristics given next to the diagram. Power is provided by a 9 V battery and a range of a few tens of meters.
This circuit was found in the 1972 RCA Power Transistor Databook. Transistors are uncommon today,...
This circuit is used to light a 20 W fluorescent lamp from the 12 V of a car battery. The...
This circuit fires by burning the fuse when the input voltage exceeds the value referenced by the zener....