This circuit was found in the November 1992 issue of Radio Electronics magazine. The circuit has an amplification stage for the relay. The relay is rated at 12 V.
This ultra-low noise circuit was found in the May 1990 issue of Radio Electronics magazine. The...
The frequency of this type is oscillator is given by the RC network. Calculations can be found in...
Although most common piezoelectric transducers have a reduction in performance at frequencies...