Introduction: How to Make LED Chaser Using 4017 and LM555 IC
Today I am going to make LED Chaser circuit using CD4017 IC and LM555 IC.In previous I made LED Chaser using CD4017 IC and RGB LED.
Let's get started,
Step 1: Take All Components As Shown Below
Step 2: Remove Resistors From Circuit
Firstly we have to remove 1K and 470 ohm Resistors,RGB LED and Battery clipper from the circuit.
Step 3: Circuit Diagram
This is the circuit diagram of this project.
~ Connect all components according to this circuit diagram.
Step 4: Connect Pin-4 to Pin-8 of LM555 IC
Solder pin-4 to pin-8 of LM555 IC using jumper wire as you can see in the picture.
Step 5: Connect Pin-2 and Pin-6 of LM555 IC
Next Solder pin-2 to pin-6 of LM555 IC using jumper wire as you can see in the picture.
Step 6: Connect 22K Resistor
Solder 22K resistor between pin-7 and pin-8 of the IC.
Step 7: Connect Potentiometer to the Circuit
Connect potentiometer to the circuit and
Connect +ve pin of 4.7uf electrolytic capacitor to pin-2 of LM555 IC and -ve of capacitor to pin-1 of LM555 IC.
Step 8: Connect 1K Resistor
Next solder 1K resistor between -ve of all LEDs to pin-1 of LM555 IC as you can see in the picture.
Step 9: Connect Wires
 Connect pin-8/13/15 of CD4017 to pin-1 of LM555 IC.
 Solder pin-16 of CD4017 to pin-4/8 of LM555 IC.
 Now solder a wire from pin-3 of LM555 IC to pin-14 of CD4017 IC as solder in the picture.
Step 10: Connect Battery Clipper Wire
Solder battery clipper wire to the circuit.
Solder +ve wire of battery clipper to pin-8/4 of LM555 IC and
solder -ve wire of battery clipper to pin-1 of LM555 IC.
Step 11: Connect Battery
Now circuit is completed so connect battery to the battery clipper.
Result : LEDs are glowing one by one.we can adjust the speed of Glowing LEDs with 50K ohm Potentiometer.