Using a 4046 PLL this circuit was obtained from the October 1994 issue of Electronics Now magazine. The circuit can be modified to generate signals at other frequencies.
This circuit is from a manual of FETs of 1977. The FET can be the BF245 or MPF102 and the relay is of...
This high impedance step suggested by an English publication can operate up to 1 MHz with 1 V rms...
This circuit generates sine low-frequency signals. The frequency depends on the twin-T network....