How the 18 LED Chaser Works
IC 4049 is used as the Oscillator
Cascading two IC 4017 Johnsons Counter for the 18 LED Effect
Looking at the above 18 LED light chaser circuit figure we see how the two ICs are configured so that the “chasing” of the LEDs at its outputs are carried on for 18 LEDs. The diodes included in the circuit especially are responsible for switching the ICs into a cascading action.
The diodes make sure the IC outputs are carried forward from one IC to another, so that the “chasing” effect is pulled for the entire 18 LEDs in the array.
The whole circuit can be built over a general purpose PCB, and connected together by soldering with the help of the shown diagram.
The circuit can be operated in between 6 volts to 12 volts.
HAVE ANY DOUBTS? FEEL FREE TO COMMENT!
LED = as per choice.