This circuit uses a parallel resonant crystal to control the frequency. The circuit is from Radio Electronics magazine, February 1993. Equivalent transistors can be used.
This very simple circuit must use coal microphones of the type found in very old equipment. The...
We found this circuit in the November 1974 issue of Radio Electronics magazine. The circuit has a...
July 21, 2015 - Mouser Electronics, Inc. is now shipping the Curiosity Development Board from ...