This basic relay configuration was found in a July 1994 Electronics Now. The relay is supposed to be sensitive, and the times are changed by changing C1.
This aperiodic circuit was found in an old English documentation. The transistor can be any JFET...
This FM transmitter circuit was found in a Japanese publication in 1975. Equivalent transistors can be...
This circuit can oscillate at frequencies up to a few tens of megahertz depending on the crystal. The...