NOTE: The above code can support DS3231 and DS1307 RTC modules.Īccuracy of Digital Clock with RTC Module: -// #include "SevSeg.h" SevSeg Display const unsigned long period = 1000 //one second const unsigned long led_period = 500 //LED blink millisecond unsigned long startMillis unsigned long led_startMillis unsigned long currentMillis unsigned long led_currentMillis const int hrs_btn = A0 const int min_btn = A1 const int ledPin = A2 int Hrs = 12 int Min = 0 int Sec = 0 int Time int ledState = LOW void setup () //-(C)-// The 4 digits are multiplexed to reduce the number of wires that connects from Arduino to 7 segment displays, this will also reduce the power consumption significantly with the equivalent power consumption of just one 7 segment display we can power 4 or more digits without any noticeable reduction in brightness, this is a huge advantage if you are powering this clock using batteries. The proposed 7 segment clock is a four digit timepiece with couple of LEDs blinking at the rate of 1 Hz between hour and minute digits. How to multiplex 4 Digit-7 Segment Displays: Circuit Diagram of 7 segment Clock with RTC.Circuit Diagram of 7 Segment Clock without RTC.
Multiplexing 4 digit-7 segment display.In this post we are going to learn how to construct 4 digit – 7 segment display digital clock using Arduino, we will be constructing two digital clocks, one with RTC and one without RTC module.
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