A Hall Effect measurement system for measuring power/amperage for graphing
This uses the circuit described in the eagle/gerber directory. We've used dirtypcbs.com to make them (http://dirtypcbs.com/view.php?share=27748&accesskey=)
The code used is in arduino/src It is dependant on https://github.com/sirleech/TrueRandom https://github.com/openenergymonitor/EmonLib https://github.com/ntruchsess/arduino_uip (which in turn is patched to support sending DHCP Client Identification which is why it is included in arduino/src)
Hall effect sensors used are SCT-013-000.
IMPORTANT!!
When running on a 2k SRAM AVR (most arduinos) you will need to tweak the serial RX/TX buffers. This can be found in Arduino/hardware/arduino/avr/cores/arduino/HardwareSerial.h
Just change #define SERIAL_TX_BUFFER_SIZE 64 to #define SERIAL_TX_BUFFER_SIZE 8
and
#define SERIAL_RX_BUFFER_SIZE 64 to #define SERIAL_RX_BUFFER_SIZE 8