Ultra precise and always up-to-date. Fun clock with Flip-Dots.
Author: Marc Staehli, initial upload June 2021
Hardware & Library: Rainer Radow, https://radow.org
Features:
- Cool time display using unique Flip-Dot technology (salvaged from busses and other public transportation)
- Arduino Nano to control the display, ESP32 to do the online (WiFi, NTP) part
- Precise time fetch every minute via NTP on connected ESP32
- RTC 3231 module in case of no WiFi available
- Automatic DST conversion (see Settings.h for ESP32) for any place in the world
- Serial transfer of data from ESP32 to Nano
- Sending status messages -> 1 = success, 2 = no WiFi, 3 = no NTP
- Status indication: dot top left indicates no WiFi, dot top right indicates no NTP
- Switchable seconds blinking on the colon
- Switchable time progress per minute
- Super silent mode (if your wife does not like the flipping sound ;-))
My Build:
- ESP32 Dev Kit 1.0 - using WiFi to get NTP Time
- Arduino Nano - controlling the Flip-Dot matrix
- Flip-Dot controller board by Rainer Radow (radow.org)
- 16x28 Brose Flip-Dot Matrix
- RTC 3231 module
- PIR Sensor - switching display off after 2 minutes no movement
- Very fleixible library works with all sizes of displays and other brands such as Krüger
Settings.h for the ESP32 includes all individal settings. Including <Timezone.h> for calculating the right timezone including global DST settings (https://github.com/JChristensen/Timezone).
Print the stand yourself: (https://)
Serial transfer of precise time every minute.