Today I am going to make an LED Chaser circuit using NE555 IC and BC547 Transistor.This LED Chaser is different from other LED Chasers circuit.
Let's get started,
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Components Required -
Step 2: Transistor - BC547
This is the Pinout of BC547 Transistor.
C - Collector,
B - Base and
E - Emmiter
Step 3: Connect All Transistors
Connect emmiter pin of one transistor to base pin of other transistor and like this we have to connect all transistors as you can see in the picture.
Step 4: Connect 10K Resistors
Solder 10K resistor to base pin of all transistors and other side of 10K Resistor connect each other as connected in the picture.
Step 5: Connect 330 Ohm Resistor
Next solder 330 ohm resistors to +ve Legs of all LEDs as you can see in the picture.
Step 6: Connect LEDs to Transistors
Next solder -ve legs of all LEDs to Collector pins of all transistors as solder in the picture.
Step 7: Connect Diode and +ve Legs of All LED
Next connect +ve Legs of all LEDs to each other as solder in picture.
Connect Anode of 1N4007 Diode to 10K Resistors and Cathode to +ve legs of all LEDs as you can see in the picture.
Step 8: Connect 2.2K Resistor
Solder 2.2K Resistor between Anode and Cathode of 1N4007 Diode as you can see in the picture.
Step 9: Connect 470uf Capacitor
Next Solder +ve pin of 25V 470uf capacitor to 10K Resistor/Anode of Diode and -ve pin to Emmiter pin of 5th transistor as you can see in the picture.
Step 10: Connect Pin-2 and Pin-6 of NE555 Ic
Solder pin-2 and pin-6 of NE555 ic.
Step 11: Connect Pin-4 and Pin-8
Next Solder pin-4 and pin-8 of NE555 ic.
Step 12: Connect 1K Resistor
Solder 1K Resistor between Pin-7 and Pin-8 of 555 IC.
Step 13: Connect 10K Resistor
Solder 10K Resistor between Pin-6 and Pin-7 of 555 IC.
Step 14: Connect 25V 100uf Capacitor
Next solder 100uf capacitor to the IC.
Solder +ve pin of capacitor to pin-2 and -ve pin to pin-1 of the IC as solder in the picture.
Step 15: Connect a Wire
Solder a wire from +ve legs of all LEDs to Pin-4 of the IC as you can see in the picture.
Step 16: Connect Second Wire
Solder next wire from -ve pin of 470uf capacitor to pin-3 of 555 IC as you can see in the picture.
Step 17: Connect Power Supply
Now connect input power supply to the circuit.
Connect +ve input power supply to Pin-8 and -ve input power supply to pin-1 of the 555 IC as you can see in the picture.