This circuit can use almost any operating system and has a high input impedance. The power supply must be symmetrical. The circuit was obtained in documentation from the 1980s.
This interesting circuit consists of a calendar whose switching is done by sensing dusk and dawn,...
In the figure we give a simple divisor by 2. The complementary output (Q /) is connected to input...
This circuit is from a Ferranti publication of 1968. The circuit generates a signal according to the...