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Simple Arduino Nano Clock with LED matrix displ
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README.md

Arduino-Matrix-Clock v1.3

Simple Arduino Clock with LED matrix display 32 x 8 pix. In this sketch is LedControl library (https://github.com/wayoda/LedControl) used.

Version 1.3 can show temperature and it is posible to turn font UpsideDown.

Menu:

  • H: Hours

  • M: Minutes

  • y: year

  • m: month

  • d: day

  • /: 12/24h time format (00 = 12h time format, 01 = 24h time format)

  • f: Font (show # of font in select font style 01 - 05)

  • :: Dot style (0 - hide, 1 - show, 2 - blinking)

  • b: Backlight intensity (00 - 15)

  • D: Show date (what second is date shown; 00 = newer, 60 = always)

  • t: Show temperature (what second is temperature shown 00 = newer, 60 = always)

  • R: Font turning 1 (turn each character; 00 = off, 01 = on)

  • r: Font turning 2 (turn all diplay; 00 = off, 01 = on)

  • U: Turn font UpsideDown (new; 00 = off, 01 = on)

  • Strt: Reset second after press the button and show actual time

You need:

  • Arduino Nano
  • DS3231 module
  • 4x LED matrix with MAX7219 driver (used LedControl library)
  • 2x button

For use external power supply (no USB) you need:

  • 1N4148 diode
  • 5V power supply

alt Arduino Matrix Clock

alt Arduino Matrix Clock - Schematics

More info in Czech language: https://www.mylms.cz/arduino-hodiny-s-maticovym-displejem/ You can use forum there.

See video: https://youtu.be/HDweqN9cDNA

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