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 was found in an English magazine from 1979. The magazine no longer exists, but the...
The arranjment sohon Bellow, and simulated in the Multisim Blue allows to see in the oscloscope...
We found this circuit in a European publication of the 1980s. The transistor could be the BC549. The...