Based on a unijunction transistor, this circuit was found in the January 1994 issue of Electronics Now magazine. The frequency range depends on C1, which can be changed.
This circuit was found in the Radio Electronics magazine of May 1990. The supply voltage depends on...
Using a BA1404 integrated circuit this small FM stereo transmitter was found in a Radio...
This circuit was found in an Elektor from the 90s. The integrated circuits are not very common...