The Project underneath shows a fascinating circuit of a LED knight rider. In this project tutorial, we will fabricate an amazing knight rider circuit by utilizing very few components. A CD4017 Johnson decade counter, three transistors, and other discrete parts. The circuit creates a lovely reverse-forward running LED impact which is the same as utilized in the vehicle of the knight rider television series.
The circuit could have many interesting uses other than in vehicles’ interior and exterior decoration. For instance, it gives an electronic “pendulum” impact to a digital clock, or it very well may utilize as a warning indicator.
Hardware Components
The following components are required to make LED Knight Rider Circuit
| S.no | Components | Value | Qty |
|---|---|---|---|
| 1. | Decade Counter Divider IC | CD4017 | 1 |
| 2. | Transistor | 2N4401, 2N4403 | 2, 1 |
| 3. | LEDs | – | 6 |
| 4. | Diodes | 1N4148 | 11 |
| 5. | Battery | 5V – 12V | 1 |
| 6. | Resistor | 1K, 5.1K, 22K, 390R | 3, 2, 1, 1 |
| 7. | Electrolytic Capacitor | 47µF, 1µF | 2, 1 |
| 8. | Variable Resistor | 100K | 1 |
CD4017 Pinout
For a detailed description of pinout, dimension features, and specifications download the datasheet of CD4017
LED Knight Rider Circuit
Working Explanation
The core of the circuit is a CD 4017 decade counter IC. The IC has 10 yield outputs which are Q0 to Q10. The IC will initiate every one of its outputs in a succession way when each time a positive pulse gets on its clock input pin 14. In the circuit, the yield outputs of the ICs are associated in a way so it will show turn around forward running the LEDs. The pulse frequency or the speed of the running LED expands or diminishes with the 100K variable resistor. The circuit can work from 5V to 12V DC.
Utilize a lower value current limiting resistor in the spot of 390 ohms while working the circuit on low voltage. For instance, in the event that you are working the circuit with less than 9V, at that point utilize a 290 ohms resistor.
Doing some little changes in the circuit it can drive higher load or AC lamps in a similar way as LEDs.
Applications and Uses
- Automobile lovers use this circuit to decorate their cars, bicycles, motorcycles, buses, trucks, and so forth.
- These are also used as indicators.
- It can also be used outside shop windows, for home decorations, parties, and other special occasions.
