With this circuit from the September 1989 issue of Radio Electronics magazine, it is possible to receive VLF band signals on a common radio, just like the signals emitted by the previous receiver.
With the capacitor used, this circuit provides delays of 40 to 60 seconds. Larger capacitors can...
Found in an Electronic Design from the 90's, this circuit generates signals for stepper motor...
The circuit shown in the figure can generate signals up to 1.6 GHz. Coil L1 and capacitor C2 are...