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Component Documentation

How to Use Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow: Examples, Pinouts, and Specs

Image of Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow

Design with Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in Cirkit Designer

Introduction

The Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow is a user-friendly display module designed for displaying alphanumeric characters in a highly visible format. This component is ideal for projects requiring a simple, bright, and clear numeric display, such as clocks, counters, and readouts for sensors.

Explore Projects Built with Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow

Arduino UNO Controlled LED and 7-Segment Display Circuit

Image of Beunen aan water: A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

This circuit features an Arduino UNO controlling multiple blue LEDs and a 4-digit 7-segment display. The LEDs are configured with current-limiting resistors, and the display is interfaced with the Arduino for potential numeric or character output. The provided code for the Arduino is a template without specific functionality.

Open Project in Cirkit Designer

Arduino UNO Controlled Seven-Segment Display Counter

Image of Arduino Uno - Seven Segment Display (Sim-C): A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

This circuit uses an Arduino UNO to control a seven-segment display, displaying digits from 0 to 9 with a one-second delay between each digit. The Arduino drives the segments of the common anode display by setting the corresponding pins to LOW, as defined in the provided sketch code.

Open Project in Cirkit Designer

Arduino UNO 4-Digit 7-Segment Display Counter

Image of arduino: A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

This circuit uses an Arduino UNO to control a 4-digit 7-segment display. The Arduino is programmed to sequentially display the numbers 1, 2, 3, and 4 on the display by driving the appropriate segments and digits.

Open Project in Cirkit Designer

Arduino UNO Controlled NeoPixel Ring Light Show

Image of 6 Ring Series: A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

This circuit consists of an Arduino UNO microcontroller connected to six Adafruit 12 NeoPixel Rings, each with 12 LEDs, for a total of 72 LEDs. The Arduino controls the LEDs to display a yellow color with varying brightness, creating a pulsating effect.

Open Project in Cirkit Designer

Explore Projects Built with Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow

Image of Beunen aan water: A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

Arduino UNO Controlled LED and 7-Segment Display Circuit

This circuit features an Arduino UNO controlling multiple blue LEDs and a 4-digit 7-segment display. The LEDs are configured with current-limiting resistors, and the display is interfaced with the Arduino for potential numeric or character output. The provided code for the Arduino is a template without specific functionality.

Open Project in Cirkit Designer

Image of Arduino Uno - Seven Segment Display (Sim-C): A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

Arduino UNO Controlled Seven-Segment Display Counter

This circuit uses an Arduino UNO to control a seven-segment display, displaying digits from 0 to 9 with a one-second delay between each digit. The Arduino drives the segments of the common anode display by setting the corresponding pins to LOW, as defined in the provided sketch code.

Open Project in Cirkit Designer

Image of arduino: A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

Arduino UNO 4-Digit 7-Segment Display Counter

This circuit uses an Arduino UNO to control a 4-digit 7-segment display. The Arduino is programmed to sequentially display the numbers 1, 2, 3, and 4 on the display by driving the appropriate segments and digits.

Open Project in Cirkit Designer

Image of 6 Ring Series: A project utilizing Adafruit Seven-Segment LED Backpack 1.2 Inch Digits Yellow in a practical application

Arduino UNO Controlled NeoPixel Ring Light Show

This circuit consists of an Arduino UNO microcontroller connected to six Adafruit 12 NeoPixel Rings, each with 12 LEDs, for a total of 72 LEDs. The Arduino controls the LEDs to display a yellow color with varying brightness, creating a pulsating effect.

Open Project in Cirkit Designer

Common Applications and Use Cases

Digital clocks and timers
Counter displays for events or devices
Temperature or other sensor readouts
Scoreboards for games or sports

Technical Specifications

Key Technical Details

Display Color: Yellow
Number of Digits: 4
Digit Height: 1.2 inches
Interface: I2C
Operating Voltage: 5V
Forward Current: 120mA (max)

Pin Configuration and Descriptions

Pin Number	Name	Description
1	GND	Ground connection
2	VCC	Power supply (3.5V to 5.5V)
3	SDA	I2C Data line
4	SCL	I2C Clock line

Usage Instructions

How to Use the Component in a Circuit

Connect the GND pin to the ground of your power supply or microcontroller.
Connect the VCC pin to a 5V output from your power supply or microcontroller.
Connect the SDA and SCL pins to the I2C data and clock lines on your microcontroller.

Important Considerations and Best Practices

Ensure that the power supply does not exceed 5.5V to prevent damage.
Use pull-up resistors on the SDA and SCL lines if your microcontroller does not have built-in pull-ups.
When using multiple I2C devices, ensure that each device has a unique address.
Avoid long wires for I2C communication to prevent signal degradation.

Example Code for Arduino UNO

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_LEDBackpack.h>

Adafruit_7segment matrix = Adafruit_7segment();

void setup() {
  matrix.begin(0x70); // Initialize the display with its I2C address
}

void loop() {
  matrix.print(1234); // Display the number 1234
  matrix.writeDisplay(); // Refresh the display with new data
  delay(5000); // Wait for 5 seconds

  // Display a hexadecimal number
  matrix.print(0xBEEF, HEX);
  matrix.writeDisplay();
  delay(5000);
}

Troubleshooting and FAQs

Common Issues Users Might Face

Display not lighting up: Check the power connections and ensure the I2C address is correct.
Garbled or incorrect characters: Verify the integrity of the I2C communication lines and check for loose connections.
Dim display: Ensure that the power supply is providing sufficient voltage and current.

Solutions and Tips for Troubleshooting

Double-check wiring against the pin configuration table.
Use the i2cdetect utility to confirm the device's address on the I2C bus.
Ensure that the Arduino library for the LED Backpack is correctly installed and up to date.

FAQs

Q: Can I change the brightness of the display? A: Yes, you can adjust the brightness using the setBrightness(uint8_t b) function, where b is a value between 0 (dim) and 15 (bright).

Q: How do I display characters other than numbers? A: The Adafruit LED Backpack library provides functions to display a limited set of characters and symbols. Refer to the library documentation for more details.

Q: Can I use this display with a 3.3V microcontroller? A: Yes, the display can be powered with 3.5V to 5.5V, but ensure that the logic levels for I2C communication are compatible with your microcontroller.