This circuit uses a capacitor that depends on the frequency of the crystal. We found it in a 1967 documentation. The maximum frequency is around 100 kHz.
You can program the 4018 in other ways, as shown in the figure. In this 7 divider configuration, for...
This circuit was suggested by Siliconix in a 1980s publication. The circuit uses components from the time...
This circuit, for frequencies up to 100 kHz, was found in American documentation from 1970. The...