App note: Low-Cost Shunt Energy Meter using MCP3909 and PIC18F25K20

Here’s a low-cost single phase energy metering solution using Microchip’s MCP3909 metering ADC and PIC18F25K20 8-bit microcontroller. App note can be found here.

The meter was tested for a range of current from 0.1A
to 20A using the Fluke 6100A Electrical Power
Standard. Measurement results are visible on the LCD
or on the Pulse Output.
This document is intended to provide guidance for
designers who are interested in using Microchip’s
MCP3909 Metering ADC with synchronous sampling
and PGA on current channel, and the low-cost high
performance PIC18F25K20 microcontroller.