An LED chaser, also called as sequenter is one of the most common LED controlling circuit. This post presents circuit of the 3 LED chaser. The LEDs blinks one by one and the process repeats which gives the running light effect. Circuit is based on BC547 transistors.
Components
No. | Component | Quantity |
---|---|---|
1. | Power supply (3V - 5V) | 1 |
2. | BC547 transistor | 3 |
3. | 20kΩ resistor | 3 |
4. | 100μF electrolytic capacitor | 3 |
5. | LED | 3 |
Circuit diagram
The speed of the LED chaser is affected by values of C1, C2, and C3 capacitors.
![3 LED Chaser Using BC547 Transistors (Circuit Diagram)](/uploads/posts/content/2021/02/3_led_chaser_using_bc547_transistors_circuit_diagram.png?v=1659785572)
Designed circuit
Circuit is designed on a breadboard.
![3 LED Chaser Using BC547 Transistors (Designed Circuit)](/uploads/posts/content/2021/02/3_led_chaser_using_bc547_transistors_designed_circuit.png?v=1659785572)
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