Found in an Electronic Design of 1964 this circuit has a control for the frequency and another for the active cycle the signal. The bipolar transistor can be a general-purpose type.
With this circuit you can produce the sound effect passing from one channel to another. The...
WWV is the prefix for the United States' time and frequency patterns station. These signals can be used...
We found this circuit in the November 1992 Radio Electronics magazine. The circuit uses an LDR as a...