This circuit was found in the November 1994 issue of Electronics Now magazine. The circuit is based on the 566 PLL and generates signals up to about 200 kHz.
We found this circuit in an old publication (1977) using common transistors at the time and now...
This circuit uses an operational that is not currently common. We found it in an old American...
Bis This two-transistor circuit was found in the January 1994 issue of Electronics Now magazine. The...