Saturday, April 8, 2023

NTP clock on 4 OLED displays

    I wanted to created a special clock as a vintage clock with VFD display, so I realised ca easiest way is to use an i2c expander as TCA9584A chip/module.

   I used info from article Guide for TCA9548A I2C Multiplexer: ESP32, ESP8266, Arduino

   I used this schematic:
and I tested Santos's sketch:

   For a real NTP clock with DST selector (winter/summer time) I used this schematic and NTP_clock_TCA9548A_4OLEDs_1.ino sketch:
so combined schematic
   For DST=1 (summer time):
and for DST=0 (winter time)
  I uploaded 2 movies:

After than I added the feature to see clock as VFD display, as in article 
so you find how clock is in this video:
NTP clock with 7-segment numbers on 4 OLED displays (2)
   I moved the project from breafboard to a classical PCB (sandwich) with 2 PCBs):
so you can see the 2 other videos:

Bibliography:

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