Key Display For AVR Arduino New 8-Bit Digital LED Tube 8-Bit TM1638 Module Documentation

Component Name

Key Display For AVR Arduino New 8-Bit Digital LED Tube 8-Bit TM1638 Module

Overview

The Key Display For AVR Arduino New 8-Bit Digital LED Tube 8-Bit TM1638 Module is a compact, 8-bit digital display module designed specifically for use with AVR Arduino boards. This module combines an 8-bit digital LED tube display with a TM1638 driver IC, allowing for easy integration of a user interface into various IoT applications.

Functionality

The TM1638 Module is a multifunctional display module that can display numerical data, alphanumeric characters, and custom symbols. It can also accept keyboard input through an 8-bit keyscan interface. The module's primary functions include

Displaying numerical values (0-9) and decimal points

Displaying alphanumeric characters (A-F) and custom symbols

Accepting keyboard input through an 8-bit keyscan interface

Providing a simple user interface for IoT applications

Key Features

8-Bit Digital LED Tube Display: The module features an 8-bit digital LED tube display, consisting of 8 separate digits, each comprising 7-segments (A-G) and a decimal point. This allows for the display of numerical values, alphanumeric characters, and custom symbols.
TM1638 Driver IC: The module is driven by the TM1638 driver IC, which provides the necessary logic and control for the display and keyboard interface.
8-Bit KeyScan Interface: The module features an 8-bit keyscan interface, allowing for the connection of up to 64 keys or switches. This enables the creation of custom user interfaces, such as keypads or button arrays.
Simple Command Set: The TM1638 Module uses a simple command set, making it easy to integrate with AVR Arduino boards.commands are sent to the module via a 3-wire serial interface (CLK, DIO, and STB).
Low Power Consumption: The module operates at a low power consumption of 5V, making it suitable for battery-powered IoT applications.
Compact Size: The module has a compact size, making it ideal for use in space-constrained IoT projects.
Easy Installation: The module is easy to install, with a simple 3-wire serial interface and 8-bit keyscan interface.

Operating Voltage

5V

Display Type

8-bit digital LED tube

Display Dimensions

48.5mm x 12.5mm

KeyScan Interface

8-bit

Number of Keys

Up to 64

Communication Interface

3-wire serial (CLK, DIO, and STB)

Current Consumption

20mA (typical)

Operating Temperature

-20C to 70C

Storage Temperature

-40C to 85C

Applications

The Key Display For AVR Arduino New 8-Bit Digital LED Tube 8-Bit TM1638 Module is suitable for a wide range of IoT applications, including

Home automation systems

Industrial control systems

Medical devices

Consumer electronics

Robotics and automotive systems

Pinout

The module has a total of 16 pins, with the following pinout

VCC (5V power supply)

GND (ground)

CLK (clock signal)

DIO (data input/output)

STB (strobe signal)

KEY1-KEY8 (keyscan interface)

Note

The pinout may vary depending on the specific module and manufacturer. Be sure to consult the module's datasheet or manufacturer's documentation for specific pinout information.

Pin Configuration

Component Name: Key Display For AVR Arduino New 8-Bit Digital LED Tube 8-Bit TM1638 Module
Pin Description:
The TM1638 module has 17 pins, which are explained below:
1. VCC: Power supply pin, connect to the positive terminal of the power source (typically 5V).
2. GND: Ground pin, connect to the negative terminal of the power source (0V).
3. DIO (Data In/Out): Data pin for communication with the microcontroller. This pin is bi-directional, meaning it can be used for both input and output.
4. CLK (Clock): Clock pin for synchronizing data transmission with the microcontroller.
5. STB (Strobe): Strobe pin for selecting the display digits.
6. WR (Write): Write pin for writing data to the display.
7. D1-D8: These are the 8-bit digital LED tube pins, which control the individual segments of the display.
8. KEY1-KEY8: These are the 8 key-input pins, which can be connected to external switches or buttons for user input.
Connection Structure:
To connect the TM1638 module to an Arduino board, follow this point-to-point connection structure:
Connect VCC to Arduino's 5V pin.
Connect GND to Arduino's GND pin.
Connect DIO to any digital pin on the Arduino board (e.g., D2).
Connect CLK to any digital pin on the Arduino board (e.g., D3).
Connect STB to any digital pin on the Arduino board (e.g., D4).
Connect WR to any digital pin on the Arduino board (e.g., D5).
Connect each of the 8 D1-D8 pins to the corresponding digital pin on the Arduino board (e.g., D6-D13).
Connect each of the 8 KEY1-KEY8 pins to external switches or buttons for user input.
Example Connection Diagram:
Here's an example connection diagram:
```
TM1638 Module | Arduino Board
---------------|---------------
VCC | 5V
GND | GND
DIO | D2
CLK | D3
STB | D4
WR | D5
D1 | D6
D2 | D7
D3 | D8
D4 | D9
D5 | D10
D6 | D11
D7 | D12
D8 | D13
KEY1 | External Switch/ Button
KEY2 | External Switch/ Button
...
KEY8 | External Switch/ Button
```
Note: Make sure to use the correct pin connections and handle the display and key-input pins according to the TM1638 module's datasheet and your specific application requirements.

Code Examples

Key Display for AVR Arduino - 8-Bit Digital LED Tube TM1638 Module

Overview

The Key Display for AVR Arduino is an 8-bit digital LED tube module based on the TM1638 chip. This module is designed to interface with AVR-based Arduino boards, providing a convenient way to display numerical and alphanumeric data using a LED tube display. The module consists of an 8-bit LED tube display, a TM1638 driver chip, and a 16-key keypad.

Pinouts

The module has a total of 10 pins:

VCC: Power supply (5V)
 GND: Ground
 DIO: Data Input/Output (Connected to Arduino's Digital Pin)
 CLK: Clock (Connected to Arduino's Digital Pin)
 STB: Strobe (Connected to Arduino's Digital Pin)
 KEY: Keypad pins (Connected to Arduino's Digital Pins)

Library and Example Code

To use the Key Display for AVR Arduino module, you'll need to install the TM1638 library. You can download the library from the Arduino Library section or install it using the Arduino Library Manager.

Here are two example code snippets demonstrating how to use the module:

Example 1: Displaying a Counting Number

In this example, we'll display a counting number from 0 to 99 on the LED tube display.

```cpp
#include <TM1638.h>

// Define the pin connections
#define DIO 2
#define CLK 3
#define STB 4

TM1638 tm1638(DIO, CLK, STB);

void setup() {
  tm1638.setDisplayEnabled(true);
}

void loop() {
  for (int i = 0; i < 100; i++) {
    tm1638.setDisplayString(i, 2); // Display the number with 2 digits
    delay(100);
  }
}
```

Example 2: Displaying a Custom Message and Reading Keypad Input

In this example, we'll display a custom message on the LED tube display and read input from the keypad.

```cpp
#include <TM1638.h>

// Define the pin connections
#define DIO 2
#define CLK 3
#define STB 4
#define KEY_PIN 5 // Keypad pin connection

TM1638 tm1638(DIO, CLK, STB);

void setup() {
  tm1638.setDisplayEnabled(true);
  pinMode(KEY_PIN, INPUT);
}

void loop() {
  tm1638.setDisplayString("Hello"); // Display a custom message
  delay(1000);

int keyState = digitalRead(KEY_PIN);
  if (keyState == HIGH) {
    tm1638.setDisplayString("Key Pressed");
    delay(1000);
  }
}
```

In this example, we've connected the keypad pin to Arduino's Digital Pin 5. When a key is pressed, the module displays the message "Key Pressed" on the LED tube display.

Additional Resources

TM1638 Datasheet: [Link](https://datasheet.lcsc.com/szlcsc/1806272133_Texas-Instruments-TM1638_C26141.pdf)
 Arduino Library for TM1638: [Link](https://github.com/Seeed-Studio/TM1638)

By following these examples and referencing the datasheet and library documentation, you can unlock the full potential of the Key Display for AVR Arduino module and create innovative IoT projects.