Introduction :
The CD4017 is a CMOS Decade counter IC.
CD4017 is used for low range counting applications.
It can count from 0 to 10 (the decade count).
The circuit designed by using  this ic  will save board space and also time required to design the circuit.

Features :
- Logic Type : Decade counter.
 - Supply Voltage: 3V to 15V.
 - Compatible with TTL (Transistor -Transistor Logic)..
 - The clock speed or operational speed of CD4017 IC is 5 MHz.
 - Package type : DIP 16.