This circuit was found in a 1977 documentation. It limits the voltage from a source using zener diodes on the rectifier bridge. It is an unusual configuration today.
In the figure we have the way to implement a sinusoidal oscillator with the 4093 IC. The component...
This oscillator can use any CMOS inverter. The circuit is crystal controlled and was found in the...
This TTL sequential flasher circuit was found in the January 1981 issue of Radio Electronics...