This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
Found in the July 1994 Electronics Now magazine, this circuit drives a relay up to 12 V depending on...
Found in the December 1995 issue of Electronics Now, this circuit generates sinusoidal signals. The...
We found this circuit in an old documentation, using an operational of the time. The circuit...