Found in an Australian documentation from 1991, this circuit was sold in a kit at the time. It is a small FM transmitter with a very common configuration, also found in other projects on this site.
This circuit was found in a Popular Electronics from the 90s. The power source must be symmetrical...
We found this test circuit in the November 1999 issue of Electronics Now magazine. The circuit is to be...
In the circuit of the figure, when pressing S1 the sound varies according to the value of R2 and...