This circuit, which can be built with several CMOS gates, was found in the March 1996 issue of Electronics Now magazine. The circuit has the base frequency determined by R1 and C1.
This circuit was found in an Electronics Now from the 80's. The frequency depends on the...
We found this traditional configuration in an Italian 1960 documentation. The transistor can be...
This receiver was found in an article in Electronics Now magazine in March 1994. The coils are...