Found in an Elektor from the 90s, this circuit simulates a rotary switch that provides a BCD output from a 1 pole x 10 common position switch. The circuit can be powered by voltages from 3 to 15 V.
Found in a Popular Electronics from the 90s, this circuit can be made with current equivalent...
This circuit uses three flip-flops and two NAND ports to obtain a frequency division by 5,...
You can program the 4018 in other ways, as shown in the figure. In this 7 divider configuration, for...