The frequency of this circuit can be varied from zero. The circuit uses the CMOS 4046 and was found in the November 1984 issue of Radio Electronics magazine. The base frequency is given by C1.
Found in an EDN from the 90s, this circuit uses an electret microphone. The output can be used to...
This circuit is characterized by the configuration that accelerates the switching, being ideal for the...
This circuit makes use of a PLL 567 to invert the phase of a signal, ie to change it from 0 to 180...