This old circuit, from the 80s, was found in American documentation. The circuit uses dual gate FETs (MOSFETs) and has no data on the coils used.
The integrated circuit used is not common today. The circuit is from the SGS linear integrated circuits...
This circuit was obtained in a 1998 documentation. It is a small low frequency signal generator with...
This circuit turns off after a time that depends on C1. The circuit is from an Electronics Now...