This simple circuit has good gain and can be implemented with any general-purpose transistor. The circuit is from Electronics Now, June 1997. The coil determines the frequency range.
This filter is inserted between the interfering device and the interfering device. The coils are...
With this circuit it is possible to obtain a voltage of 24 V using a 12 V regulator. The maximum...
This circuit from a 1995 documentation triggers a set of lamps when the power goes out. In a more...