By: Abilas & Osama
Description : An integrated circuit with 16 Pins. It was designed to count pulses. They are often
used in timing circuits and to switch on/off LEDs.
Schematic Symbol :
Operation: The 4017 IC takes a clock pulse in and then outputs in 10 steps. It counts to a certain
number and restarts the count or can stop the count. It can reset at 10 instead of 16, and can make
each count available on each pin of the IC. The pulse from the 555 timer can be used to activate
a 4017 IC. The 555 IC can pulse it at regular intervals, which will cause the designated pin of the
4017 IC to emit current lighting the LED. Another pulse from the 555 IC results in the next pin
of the 4017 IC to emit current.