Imagine! If your digital clock has a power outage then it will need re-setting, how it is annoying. For you has this problem, here is the simple solution with NTP. This is the prototype NTP LED clock but it has good complement.
This is an update to Standalone WiFi Radio Control Panel , which enables it to tweet the currently playing song and station. The project is based on an AdaFruit Boarduino, an Arduino-compatible microcontroller platform, with an Ethernet shield, an LCD, and a rotary encoder.
LEBV1 consists of four main parts such as main MCU part, LCD I/F part, TDFI I/F part and W5100 ethernet module part. LEBV1 is based on Arduino UNO board, so main MCU is ATMEGA328P. In addition, it has FTDI interface for reprogramming and LCD interface to display any requested information on LCD. And finally, it has W5100 ethernet Module for internet connectivity. W5100 is coming from WIZnet. This article is from Mr. Yves parent who tried to develop a commercialzed product which has compact size and attractive BOM cost. And then as a resulf of his efforts, it comes out like the below final PCB for LEBV1.
This content shows how to make an access control system using Arduino and Ethernet shield which is using WIZnet chip. When RFID card is near the RFID Reader, it beeps and then the RFID number is sent to the server through the Arduino Ethernet Shield.
This explains how to use the Arduino Ethernet Shield with AMICUS18 Open source hardware board based on PIC MCU and how to develop with CrownHill's Proton BASIC.