Wordclock with Arduino and NeoPixel

Arduino source code for my DIY Wordclock.

Features

This project includes the following features:

• Arduino Nano as a microcontroller
• 114 NeoPixel LEDs WS2812b as Zic-Zac matrix starting from top left
• RTC module DS3231
• DCF77 receiver for German clock signal
• 7 different color modes (switched when turned off/on within 10 seconds after startup)
• light sensor to adjust the brightness of LEDs to the environment
• DCF77 signal quality measurement on every startup and display on LED matrix (see description below)

Full Tutorial

The full tutorial on how to build this Wordclock is published on

https://techniccontroller.com/word-clock-with-arduino-and-neopixel/

Used Libraries

To use this source code, you need to install the following libraries in Arduino IDE. I have also included the versions of the libraries I use in this repository. In case of any problems, please use the versions I've provided.

• https://github.com/adafruit/RTClib
• https://github.com/PaulStoffregen/Time
• https://github.com/thijse/Arduino-DCF77
• https://github.com/adafruit/Adafruit-GFX-Library
• https://github.com/adafruit/Adafruit_NeoPixel
• https://github.com/adafruit/Adafruit_NeoMatrix
• https://github.com/adafruit/Adafruit_BusIO

DCF77 Signal quality measurement

I added a signal measurement feature for the DCF77 receiver. The signal quality is now also displayed at each startup with the LEDs:

1. (during measurement) top left LED flashes blue,
2. (after measurement) red/green the signal quality is shown as a bar for 2 seconds (10 leds = good, 1 led = bad)

wordclock_dcf77_signal.mp4