This circuit was found in an 80's Electronic Engineering. The circuit uses operatives of the time that are not common today. The power supply must be symmetrical.
This 1975 circuit for automotive applications replaces the mechanical vibrator found in old cars...
This circuit is from Motorola documentation, but can be implemented with virtually any...
The LM1468L can also be used. The circuit is from Motorola's Linear Interface ICs and the...