Current and Voltage

• How to build an Arduino energy monitor - measuring mains voltage and current
  • Step One – Gather Components
  • Step Two – Assemble the Electronics
  • Step Three – Upload the Arduino Sketch
• Calibration Procedure
  • Why calibrate?
  • Calibrating the Internal Reference Voltage
  • Recommended Calibration Method
  • Procedure:
  • Calibrating in emonhub.conf
  • Theoretical CT Sensor Calibration
  • Theoretical AC-AC Adapter calibration
  • Other AC-AC Adapters
• EmonLib Calibration Theory
  • Voltage sensor
  • Current sensor
  • Phase angle (power factor) constant
• Sources of Error in the emonTx Voltage and Current Inputs
  • The Transformers
  • The Input Circuitry
  • The A-D Converter
  • Adding Up the Worst Case Errors…
  • Summary
• Installation and Calibration
  • Installation
  • Calibration Theory
• How good is your multimeter?
  • Safety Rating
• Buffered Voltage Bias
  • Improving the quality of the bias source
  • Notes
• Digital filters for offset removal
  • Digital high pass filter
  • Digital low pass filter
• Explanation of the phase correction algorithm