Internet related projects

Solar Energy Meter
Turn 8051SBC to be a dedicated instrument for measuring AC energy when sunshine.
The 8051SBC is a microprocessor learning board that has eeprom for program saving and later with the SW1 dip switch set to 0, will enable bootloader function. This simple project, the Solar Energy Meter demonstrates the use of such boot loader function. The meter measures amount of AC energy produced by photovoltaic power system. It uses photocoupler attach to electromechanical energy meter to detect the number of revolution. Total AC energy will save everyday in NVRAM. Reading of recorded data can be made via Telnet.
http://jaspal.sitesled.com/sem.html

nice but.. where is the circuit diagram, and i don't think its useful because, its not a stand alone application, its used with SBC only. still good
its from the website "Build your own microcontroller projects" i think