Total Pageviews


Tuesday, November 8, 2016

Adjusting clock with alarm & thermometer using DS3231 on 1.8" ST7735 display

   In previous article I made a clock with manual adjust for date and hour, noow I put a push button for activate and deactivate alarm, also in menu I can change hour and minute for alarm.
   When alarm is activated a small sign and hour for alamr is with whilte
when alarm is deactivated sign and hour is with blue colour.
    When is time alarm (1 minute), if alarm is activate sign is red and LED is lit (instead led you can put a relay module for power a radio, a bulb light, etc)
but if you push ALARM button alarm is deactivade
   Schematic for made this clock is
and the sketch is TFT_DigitalClock_RTC1d.ino.
   I made a movie named adjuting clock with alarm & thermometer using DS3231 on 1.8" ST7735 display when you can see who the clock work:

   PS: I made some changes in last sketch to store hour and state of alarm in EEPROM memory of ATmega, see TFT_DigitalClock_RTC1e.ino !!!


  1. Hi great job! I succeeded to make this. What happened to the left most side and top side lines that do not be erased to black. Any solutions?? Thanks in advance.

  2. Really very interesting and very valuable information about the Travel Alarm Clocks well done..
    Travel Alarm Clocks