Suggested by Philips in 1966 documentation, this limiter can be found elsewhere on this website. The circuit is for 7 V, but can be changed to other voltages, depending on the zener diodes.
This circuit using a SIDAC as a relaxation oscillator was found in the ON Semiconductor manual for...
We found this circuit in a 1974 documentation. Upon receiving an audio signal, it activates a...
This circuit was obtained from an American publication of 1982, but can be assembled with ease...