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Component Documentation

How to Use TM1637: Examples, Pinouts, and Specs

Image of TM1637

Design with TM1637 in Cirkit Designer

Introduction

The TM1637 is a dedicated LED driver control circuit that is designed to handle up to four 7-segment numeric displays with additional decimal points. This component is widely used in applications requiring numeric output, such as digital clocks, thermometers, counters, and other electronic devices that require a simple and clear numeric display.

Explore Projects Built with TM1637

Arduino Nano 33 BLE Battery-Powered Display Interface

Image of senior design 1: A project utilizing TM1637 in a practical application

This circuit features a Nano 33 BLE microcontroller interfaced with a TM1637 4-digit 7-segment display for information output, powered by a 3.7V battery managed by a TP4056 charging module. The microcontroller communicates with the display to present data, while the TP4056 ensures the battery is charged safely and provides power to the system.

Open Project in Cirkit Designer

Raspberry Pi 3B Controlled TM1637 Digital Display Interface

Image of clock: A project utilizing TM1637 in a practical application

This circuit connects a TM1637 display module to a Raspberry Pi 3B. The Raspberry Pi controls the display via GPIO pins 20 and 21 for data and clock signals, respectively. The TM1637 is powered by the Raspberry Pi's 5V supply, and both devices share a common ground.

Open Project in Cirkit Designer

Arduino Nano and TM1637 Real-Time Clock Display

Image of test: A project utilizing TM1637 in a practical application

This circuit uses an Arduino Nano to control a TM1637 4-digit 7-segment display module, displaying the current time. The Arduino reads the time from an RTC (Real-Time Clock) module and updates the display every second.

Open Project in Cirkit Designer

Arduino UNO Controlled TM1637 Display and SG90 Servo Motor Interface

Image of RC Pulse measurement: A project utilizing TM1637 in a practical application

This circuit features an Arduino UNO microcontroller connected to a TM1637 display module and an SG90 servo motor. The Arduino provides power to both the display and the servo motor, and it controls the display via digital pins D4 (DIO) and D3 (CLK), and the servo motor via pin D2 (PWM). The primary function of this circuit is likely to display information on the TM1637 module and to control the position or motion of the servo motor based on some programmed logic within the Arduino.

Open Project in Cirkit Designer

Explore Projects Built with TM1637

Image of senior design 1: A project utilizing TM1637 in a practical application

Arduino Nano 33 BLE Battery-Powered Display Interface

This circuit features a Nano 33 BLE microcontroller interfaced with a TM1637 4-digit 7-segment display for information output, powered by a 3.7V battery managed by a TP4056 charging module. The microcontroller communicates with the display to present data, while the TP4056 ensures the battery is charged safely and provides power to the system.

Open Project in Cirkit Designer

Image of clock: A project utilizing TM1637 in a practical application

Raspberry Pi 3B Controlled TM1637 Digital Display Interface

This circuit connects a TM1637 display module to a Raspberry Pi 3B. The Raspberry Pi controls the display via GPIO pins 20 and 21 for data and clock signals, respectively. The TM1637 is powered by the Raspberry Pi's 5V supply, and both devices share a common ground.

Open Project in Cirkit Designer

Image of test: A project utilizing TM1637 in a practical application

Arduino Nano and TM1637 Real-Time Clock Display

This circuit uses an Arduino Nano to control a TM1637 4-digit 7-segment display module, displaying the current time. The Arduino reads the time from an RTC (Real-Time Clock) module and updates the display every second.

Open Project in Cirkit Designer

Image of RC Pulse measurement: A project utilizing TM1637 in a practical application

Arduino UNO Controlled TM1637 Display and SG90 Servo Motor Interface

This circuit features an Arduino UNO microcontroller connected to a TM1637 display module and an SG90 servo motor. The Arduino provides power to both the display and the servo motor, and it controls the display via digital pins D4 (DIO) and D3 (CLK), and the servo motor via pin D2 (PWM). The primary function of this circuit is likely to display information on the TM1637 module and to control the position or motion of the servo motor based on some programmed logic within the Arduino.

Open Project in Cirkit Designer

Common Applications and Use Cases

Digital clocks and watches
Electronic counters
Timers
Thermometers
Calculators
DIY projects involving numeric displays

Technical Specifications

Key Technical Details

Operating Voltage: 3.3V to 5.5V
Max Output Current: 40mA (per segment)
Display Mode: 7-segment & 8-grid
Interface Type: I2C-like two-wire serial interface
Clock Frequency: 500kHz (max)
Dimensions: 42mm x 24mm x 12mm (approximate)

Pin Configuration and Descriptions

Pin Number	Pin Name	Description
1	VCC	Power supply (3.3V to 5.5V)
2	GND	Ground
3	DIO	Data input/output pin for two-wire interface
4	CLK	Clock pin for two-wire interface

Usage Instructions

How to Use the TM1637 in a Circuit

Power Connections: Connect the VCC pin to a 3.3V or 5V power supply and the GND pin to the ground of your circuit.
Data and Clock Connections: Connect the DIO and CLK pins to the microcontroller's digital I/O pins.
Initialization: Initialize the TM1637 with the appropriate library and set the brightness level.
Display Data: Send the data to be displayed using the library functions.

Important Considerations and Best Practices

Ensure that the power supply voltage matches the operating voltage of the TM1637.
Use current-limiting resistors if necessary to prevent damage to the LED segments.
Avoid exposing the display to high temperatures or moisture.
When using with a microcontroller like Arduino, ensure that the library used is compatible with the TM1637.

Example Code for Arduino UNO

#include <TM1637Display.h>

// Define the connections pins
#define CLK 2
#define DIO 3

// Create a TM1637Display object
TM1637Display display(CLK, DIO);

void setup() {
  display.setBrightness(0x0f); // Set the display to maximum brightness
}

void loop() {
  display.showNumberDec(1234); // Display a number (1234 in this case)
  delay(2000); // Wait for 2 seconds
  display.clear(); // Clear the display
  delay(1000); // Wait for 1 second
}

Troubleshooting and FAQs

Common Issues Users Might Face

Display Not Lighting Up: Check the power supply connections and ensure that the voltage is within the specified range.
Garbled or Incorrect Display: Verify that the data and clock connections are secure and that the correct pins are being used.
Dim Display: Adjust the brightness level using the library functions.

Solutions and Tips for Troubleshooting

Double-check all connections, especially the VCC and GND, to ensure they are not reversed.
Use the example code as a starting point and modify it according to your needs.
If using long wires to connect the display, consider using a pull-up resistor on the DIO and CLK lines to improve signal integrity.

FAQs

Q: Can the TM1637 drive more than four 7-segment displays? A: No, the TM1637 is designed to drive up to four 7-segment displays with decimal points or a combination of up to 8 digits.

Q: Is the TM1637 compatible with all microcontrollers? A: The TM1637 can be interfaced with any microcontroller that supports a two-wire serial interface, but the library used must be compatible with the specific microcontroller.

Q: How do I change the display brightness? A: The display brightness can be adjusted using the setBrightness() function provided by the TM1637 library.

Q: Can I display letters as well as numbers? A: The TM1637 is primarily designed for numeric displays, but it is possible to display a limited set of characters that can be represented with 7-segment displays.