Arduino Giga R1 WiFi 10 Segment LED Bar Graph
In this guide, we will learn how to use the 10 Segment LED Bar Graph with the Arduino GIGA R1 WiFi. In detail, we will learn:
- How to connect the 10 Segment LED Bar Graph to the Arduino GIGA R1 WiFi.
- How to write a program for the Arduino GIGA R1 WiFi to drive the LED bar display.
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Overview of 10 Segment LED Bar Graph
| 10 Segment LED Bar Graph | |
|---|---|
| Number of Segments | 10 |
| LED Color | Bright red |
| Forward Voltage | ~2V per segment |
| Forward Current | 20mA max per segment |
| Resistor Required | 220Ω per segment |
Pinout
- Anode pins (A1–A10): connect to GPIO pins via 220Ω resistors
- Cathode pins (K1–K10): connect to GND
Wiring Diagram between 10 Segment LED Bar Graph and Arduino GIGA R1 WiFi
Connect each anode pin of the LED bar graph to an Arduino GIGA R1 WiFi GPIO pin through a 220Ω resistor, and connect all cathode pins to GND.
This image is created using Fritzing. Click to enlarge image
| LED Bar Graph | Arduino GIGA R1 WiFi Pin |
|---|---|
| A1 (Anode 1) | Pin 2 (via 220Ω) |
| A2 (Anode 2) | Pin 3 (via 220Ω) |
| A3 (Anode 3) | Pin 4 (via 220Ω) |
| A4 (Anode 4) | Pin 5 (via 220Ω) |
| A5 (Anode 5) | Pin 6 (via 220Ω) |
| A6 (Anode 6) | Pin 7 (via 220Ω) |
| A7 (Anode 7) | Pin 8 (via 220Ω) |
| A8 (Anode 8) | Pin 9 (via 220Ω) |
| A9 (Anode 9) | Pin 10 (via 220Ω) |
| A10 (Anode 10) | Pin 11 (via 220Ω) |
| K1–K10 (Cathodes) | GND |
How To Program Arduino GIGA R1 WiFi for 10 Segment LED Bar Graph
- No library needed for the LED Bar Graph.
- Define an array of 10 pin numbers corresponding to the LED anodes.
- Configure each pin as an output.
- Turn a segment on: set the corresponding pin HIGH.
- Turn a segment off: set the corresponding pin LOW.
Arduino GIGA R1 WiFi Code - 10 Segment LED Bar Graph
/*
* This Arduino Giga R1 WiFi code was developed by newbiely.com
*
* This Arduino Giga R1 WiFi code is made available for public use without any restriction
*
* For comprehensive instructions and wiring diagrams, please visit:
* https://newbiely.com/tutorials/arduino-giga/arduino-giga-r1-wifi-10-segment-led-bar-graph
*/
const int NUM_SEGMENTS = 10;
const int ledPins[NUM_SEGMENTS] = {2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
void printBar(int litCount) {
Serial.print("Bar: [");
for (int i = 0; i < NUM_SEGMENTS; i++) {
Serial.print(i < litCount ? "*" : " ");
}
Serial.println("]");
}
void setup() {
Serial.begin(9600);
for (int i = 0; i < NUM_SEGMENTS; i++) {
pinMode(ledPins[i], OUTPUT);
digitalWrite(ledPins[i], LOW);
}
}
void loop() {
for (int i = 0; i < NUM_SEGMENTS; i++) {
digitalWrite(ledPins[i], HIGH);
printBar(i + 1);
delay(100);
}
delay(500);
for (int i = NUM_SEGMENTS - 1; i >= 0; i--) {
digitalWrite(ledPins[i], LOW);
printBar(i);
delay(100);
}
delay(500);
}
Detailed Instructions
Follow these instructions step by step:
- LINK_GETTING_STARTED_ARDUINO_GIGA_R1_WIFI
- Wire the components according to the provided diagram.
- Launch the Arduino IDE on your computer.
- Select the appropriate Arduino GIGA R1 WiFi board and COM port.
- Copy the code above and paste it into the Arduino IDE.
- Click the Upload button to upload the code to the Arduino GIGA R1 WiFi.
- Open the Serial Monitor.
- Observe the LED bar filling up and emptying repeatedly, and check the output in the Serial Monitor.
Serial Monitor Output
8
Serial.println("Hello World!");
Message (Enter to send message to 'Arduino Giga R1' on 'COM15')
New Line
9600 baud
Bar: [* ]
Bar: [** ]
Bar: [*** ]
Bar: [**** ]
Bar: [***** ]
Bar: [****** ]
Bar: [******* ]
Bar: [******** ]
Bar: [********* ]
Bar: [**********]
Bar: [********* ]
Bar: [******** ]
Bar: [******* ]
Bar: [****** ]
Bar: [***** ]
Bar: [**** ]
Bar: [*** ]
Bar: [** ]
Bar: [* ]
Bar: [ ]