Embedded Lab

This project describes a whole house energy monitor that provides quick access to current energy use information, usb datalogging for detailed long term data storage and Internet connectivity for online graphing.

The display unit uses four seven-segment LED displays that shows real power, apparent power, power factor, RMS voltage, RMS current, frequency and cumulative KWH consumed.

Features:

• Voltage measurement with step down AC to AC adapter
• Current measurement with CT sensor.
• Power for sensor board provided with same AC to AC adapter used for voltage measurement.
• Calculation of Real power, Apparent power, power factor, RMS voltage, RMS current, frequency, cumulative kWh.
• Display unit consisting of large green 7 segment display,
• 6 mode – mode chooser and red/green led indicator to indicate when grid is below and above 50Hz.
• USB pen data logging using VDIP1 board
• Xbee wireless link from sensor unit to the Ethernet unit.
• Ethernet board for logging and graphing on Internet.
• Flot based graphing on website.