What components do I need for the LED Chaser Animation project?

For the LED Chaser Animation project, you need: 1x Arduino Uno R3 (ATmega328P, 5V), 8x LEDs (5mm) (Red/Green, 2V, 20mA), 8x Resistors (220 Ohm, 1/4W, +/-5%), 1x Breadboard (830 tie-points), ~12x Jumper Wires (Male-to-Male), 1x USB Cable (Type A to B).

How do I build an LED Chaser Animation with Arduino?

Build a Knight Rider-style LED sequence that sweeps back and forth. Your first step into the world of digital output and timing. Follow these 6 steps: Step 1: Set Up the Breadboard. Step 2: Add Current-Limiting Resistors. Step 3: Wire LEDs to Arduino. Step 4: Connect Ground. Step 5: Upload the Code. Step 6: Experiment!.

How long does the LED Chaser Animation project take?

The LED Chaser Animation Arduino project typically takes 30–60 minutes to complete, including wiring and uploading the code. It is rated as a Basic-level project, suitable for beginners with no prior electronics experience.

Is the LED Chaser Animation Arduino code free to use?

Yes. All Arduino code on Volt X, including the LED Chaser Animation sketch, is completely free to use, copy, and modify for personal or educational projects.

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Basic . Project #01

💡 LED Chaser Animation

Build a Knight Rider-style LED sequence that sweeps back and forth. Your first step into the world of digital output and timing.

📋 Overview

An LED chaser is one of the most satisfying beginner projects in electronics. You line up 8 LEDs and program them to light up one at a time in sequence, creating a smooth "running light" effect — just like the scanner on KITT from Knight Rider.

What you'll learn: Digital pin output (digitalWrite), for loops, timing with delay(), and how to wire multiple LEDs with current-limiting resistors.

Estimated time: 30–45 minutes. Difficulty: ⭐ Beginner-friendly — no prior experience required.

🧩 Components Needed

Component	Specification	Qty	Notes
Arduino Uno R3	ATmega328P, 5V	1	Any Uno-compatible board works
LEDs (5mm)	Red/Green, 2V, 20mA	8	Any color -> mix for fun
Resistors	220 Ohm, 1/4W, +/-5%	8	One per LED for current limiting
Breadboard	830 tie-points	1	Full-size recommended
Jumper Wires	Male-to-Male	~12	Various lengths
USB Cable	Type A to B	1	For uploading code

📖 Step-by-Step Tutorial

Set Up the Breadboard

Place 8 LEDs in a row on the breadboard with the longer leg (anode, +) on the right and the shorter leg (cathode, -) on the left. Leave 2-3 rows between each LED for space.

Add Current-Limiting Resistors

Connect a 220 Ohm resistor from each LED's cathode (short leg) to the ground rail (blue/black stripe) on the breadboard. This protects each LED from burning out.

Wire LEDs to Arduino

Use jumper wires to connect each LED's anode (long leg) to Arduino digital pins 2 through 9. LED 1 -> Pin 2, LED 2 -> Pin 3, and so on up to LED 8 -> Pin 9.

Connect Ground

Run a jumper wire from the breadboard's ground rail to the GND pin on the Arduino. This completes the circuit for all 8 LEDs.

Upload the Code

Open the Arduino IDE, paste the code below, select your board and port under Tools, then click Upload (-> arrow). Watch the LEDs chase back and forth!

Experiment!

Try changing the delayTime variable to speed up or slow down the animation. Try lighting 2 LEDs at once, or reverse the direction. Make it your own!

💡

Always use resistors with LEDs. Without them, the LED draws too much current and can burn out instantly. The 220Ω value works for most 5V setups with standard LEDs.

💻 Arduino Code

led_chaser.ino

INO

// LED Chaser Animation — Volt X
// Pins 2-9 connected to 8 LEDs via 220Ω resistors

const int firstPin = 2;   // First LED pin
const int lastPin = 9;    // Last LED pin
int delayTime = 80;       // Speed in ms (lower = faster)

void setup() {
  for (int pin = firstPin; pin <= lastPin; pin++) {
    pinMode(pin, OUTPUT);
  }
}

void loop() {
  // Sweep forward: left to right
  for (int pin = firstPin; pin <= lastPin; pin++) {
    digitalWrite(pin, HIGH);
    delay(delayTime);
    digitalWrite(pin, LOW);
  }
  // Sweep backward: right to left
  for (int pin = lastPin; pin >= firstPin; pin--) {
    digitalWrite(pin, HIGH);
    delay(delayTime);
    digitalWrite(pin, LOW);

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