![]() ![]() ![]() You can also use a Common Cathode 7-segment display, just adjust the DISPLAY_TYPE constant in config.h, and switch to NPN transistors. ![]() You can change the values of the TONES array, TONE_TIME and TONE_SPACING to customize the alarm and play different tones and melodies. AlarmTone - The AlarmTone class play the alarm sound.It uses the RTClib library to communicate with the RTC chip and track time. Clock - The Clock class manages the current time and the alarm state machine.It manages the user interface: the 7-segment display and the buttons. alarm-clock.ino - The main program code.Using a configuration file a common practice when you have several modules in your program. config.h - Configuration options for the clock: whether to use an RTC chip, Snooze time, and more.The code is divided into several modules: To stop the alarm, hold down the Alarm button for one second or more. The screen will display four circles to let you know that the alarm was snoozed. When the alarm goes off, press the Alarm button briefly to snooze it forĩ minutes. To finish, press the Alarm button again, or just wait a few seconds. You can use the Minute/ Hour buttons to adjust the alarm time. The screen will display the alarm state by showing the word "on" or "off".Īfter enabling the alarm, the current alarm time will be displayed for a few seconds. Pressing the Alarm button enables/disables the alarm. To set the time, press the Minute/ Hour buttons. Power loss recovery: current time and alarm settings are stored in RTC.Optional RTC to make the clock more accurate.The colon symbol blinks to indicate seconds.The alarm sound can be easily customized in code, and even play melodies.Programable alarm with a snooze function.Two buttons for setting the current time (Hour / Minute).This digital alarm clock displays the time on a 4-digit 7-segment display. ![]()
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