![]() ![]() Here I’m adding the Arduino program code for our project. I’m planning to post it in the upcoming Arduino series. You can make this as a device timer by simple changes in the program and circuit, the delay time that the duration of alarm can be increased, and connect a relay at the 9th pin with a relay driving transformer. There are no external components are used in the Arduino real-time clock alarm, which makes our project more flexible.The detail instruction, code, wiring diagram. The D11 pin of the Arduino is connected to the two White LEDs that are visible on either side of the digital clock. Learn how to display time on OLED using Arduino, DS3231 or DS1307 RTC module. The A1, A2, and A3 pins on the Arduino are used to connect the DS1302 RTC Module. DS Robotics DV 6V30V Multifunction Trigger Delay Time Module Switch Control Timer Relay Digit LED Display Micro USB 5V for Arduino Timer Counter and Clock. ![]() The duration of the Alarm sound is set to 1 minute. The Arduino's D4 and D5 pins are used to connect the TM1637 Digital Clock Module.If the clock time matches with the alarm time then LCD will display “RINGING” and it will set pin 11 which is connected to a buzzer or any other audio device, here we used UM66 with a buzzer.By attaching appropriate accessories to the expansion pins, it may be turned into a LED clock, a TV game console. How does the alarm logic work? It is simple, while the system running in any of the modes it compares Clock time with Alarm time with AM/ PM. Armadino is more than an Arduino Electronics Kit.The device can be switched to ALARM MODE by pressing the Mode button, then the same buttons (minute and hour) are used to set alarm.When the system is running in TIME MODE, we can set time by using the minute and hour button directly without entering any mode.If the mode button is pressed the variable “alm” becomes TRUE then program control will display an alarm.Three pushbuttons are used here for setting up time and alarm, one for mode selection, remaining for minutes and hours.180 RGB LEDs driven by TLC5925 constant current LED drivers each LED addressed separately (12x TLC5925 with 16 outputs each). Initially “alm” is declared as FALSE, which helps to display time on the LCD screen the first time when the system is ON. Arduino RGB LED clock via Hacked Gadgets.Either way, in this project, the LEDs are arranged as follows: This picture shows an example of a binary clock. Smaller wristwatch-style devices may use a slightly different arrangement to save space. A variable “ alm” is declared as Boolean and it will change the state between Clock and Alarm when we press the mode button that is connected in pin 9. IoT and Embedded System Simulator: ESP32, STM32, Arduino, Raspberry Pi Pico, displays, sensors. However, in this project, I used a six by four LED matrix, as it’s common in larger binary clocks, for example, wall-mounted ones.LCD 16×2 is used to display time and alarm, which is connected to digital pins 2 to 7 of Arduino board.* 4 digit 7 segment display: Datasheet: */ // modified connexion by niq_ro from // dataseet: // Code modified by BMIAK Basnayaka // int digit1 = 11 int digit2 = 10 int digit3 = 9 int digit4 = 6 int digit5 = 5 int digit6 = 3 //Pin mapping from Arduino to the ATmega DIP28 if you need it // int segA = 0 //Display pin 11 int segB = 1 //Display pin 7 int segC = 2 //Display pin 4 int segD = 4 //Display pin 2 int segE = 7 //Display pin 1 int segF = 8 //Display pin 10 int segG = 12 //Display pin 5 int segDP = 13 // Display pin 3 #include #include "RTClib.
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