Making Digital clock using “TM1637 4-digit display”

Introduction

In this tutorial we will be making digital clock using “TM1637” 4-digit display and “RTC PCF8563” real time clock module , First we will get “Hour” and “Minute” from  real time clock module and then we will use this Hour and minute to display timing on TM1637 4-digital display.

TM1637 4-digit display

TM1637  is used to drive seven segments display , there are many modules available which countain TM1637 chip to form a 4-digit numerical display module.

Features

• Use either the raw segment value or decimal number
• Set either the whole display  or any  digit independently
• Control the brightness
• Pure software impelementation

Pin description

TM1637 4-digit display have 4 pins

• VCC
• GND
• CLK  (clock pin for I2C communication )
• DIO  ( Data Input output pin )

Circuit diagram

• Connect ‘VCC’ of ‘TM1637’ module to ‘VCC’ of evive
• Connect ‘GND’ of ‘TM1637’ module to ‘GND’ of evive
• Connect ‘CLK’ of ‘TM1637’ module to pin number 2 of evive( Yellow wire in circuit diagram given below)
• Connect ‘DIO’ of ‘TM1637’ modue to pin number 3 of evive(White wire in circuit diagram gien below)

Steps for setting time 

• First connect evive with computer ( using USB A -B cable ) , then upload the code which is given below
• Then move slid switch-1 in “UP” position and use Potentiometer-1 and Potentiometer-2  to set Hour and minute as show above
• Potentiometer-1 and Potentiometer-2 are connected internally to analog pin A9 and A10 of evive respectivly , they will give digital reading (from 0 to 1023) ,we will use map function to convert them (form 0 to 59 and 0 to 12 ) for minutes and hour 
• After setting time using potentiometer-1 and potentiometer-2  , move slid switch-1 in “Down” position , this will start to display timing on TM1637 4 digit display module

Arduino code

Libraries used in the code

• rtc_pcf8563 library  ( click here to download)
• TM1637 library         ( click here to download)

Expected Result