Using a 4046 PLL this circuit generates rectangular signals in three wavebands that depend on the capacitors used. The circuit is from a Radio Electronics from December 1989.
This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input...
This circuit was obtained in a 1980 English magazine, but it can be easily assembled today, since...
We found this circuit in documentation from the 1980s. The integrated circuit used is uncommon today,...