This circuit was found in a Philips documentation from 1970. The components are of the time, difficult to find today, but the configuration can be adapted to use modern equivalent components.
A configuration like the one used with the 4013 is also suitable for the 4027. The amount of time...
We found this circuit in the Audio Handbook of the National Semiconductor of 1977. The circuit is used...
We found this configuration in an integrated circuits manual. The transistor, which can be of any...