In the figure we have one of the many ways to program the counting of a 4017. The circuit uses additional gates and was found in the Radio Electronics magazine of April 1989.
As monostable we have a proximity switch that can be used as a shield, since the capacitance of...
This circuit was obtained from a 1998s Popular Electronics. The magazine no longer exists, but the...
This circuit was found in the 1972 RCA Power Transistor Databook. Transistors can be replaced by...