This circuit was found in an ancient American documentation. With it is possible to double the frequency of a transmitter For the range of 6 meters obtaining 8 W. The circuit makes use of varicap.
This circuit was obtained in a 1982 publication. There are many types of car alarms available to...
This circuit was found in a 1998 documentation. It makes use of 741 or other operational...
In the figure we give the set-reset flip-flop configuration in which two Norton amplifiers are used in...