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.
Designed circuit
Circuit is designed on a breadboard.
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