This digital to analog converter circuit was found in the July 1991 issue of Radio Electronics magazine. The circuit converts the output current to voltage.
Using a capacitor as a sensor, this circuit can detect signals from 50 MHz to 500 Hz, according to the...
Although MOSFETs of the type indicated are not very easy to obtain, one can have the circuit as a...
Found in Radio Electronics from the 90s, this circuit generates signals in the 60 Hz to 1.4 Hz...