Dilshan R Jayakody’s Web Log

This project introduces an open-source, ATmega328 based, configurable NTP clock with a 2.3-inch, 7-segment display driver. This clock automatically obtains time from the configured NTP server and updates the date and time of the built-in RTC (real-time clock). If the connection to the NTP server is lost, the clock continues to run using its built-in RTC. Finished NTP clock driver PCB. All the parameters of this clock can configure using its USB base serial terminal. The firmware of this clock supports both static and DHCP addressing modes. Apart from that, parameters such as NTP server address, time-offset, and clock display formats can change through the menu-driven configuration terminal. This clock is designed to drive large common-anode, 7-segment displays. The prototype version is assembled using four individual segments of 7.2V, 2.3-inch, red color displays ( FJS23101BH ). To archive, the necessary high output voltage and the current, the 7-segment display output stage of this ...

Simple NTP clock is a maintenance-free clock application developed to work on single-board computers like Raspberry Pi , Orange Pi , etc. This clock application uses the Simple Network Time Protocol (SNTP) to get the time and display it on seven segment display which I designed . This application is designed to work on most of the Linux based systems and had minimum dependencies with system libraries and peripherals. I developed this application to work with Allwinner H2 Plus based Orange Pi Zero board, but this can compile for other platforms without doing any modifications on the source code. NTP clock on Orange Pi Zero. To compile this application issue the following commands: make clean make Parameters related to this application are available at config.json file. This file can be used to specify the NTP server, time zone, and display module port. The source code of this project is available at github.com .