Low-energy BOINC

Power consumption

For the power consumption we are currently using the WattsUp! Pro meter. The solutions we have looked at include:


WattsUp! Pro

The WattsUp! meter is produced by the company of the same name. The Pro version has a serial-over-usb connection that allows software to obtain the data from the meter.

Advantages
  • Serial over USB connection
  • Reliable enough
  • Code for Windows & Linux
Disadvantages
  • Cost: approx. 120 euros/ $120
  • We already have working code

Open Energy Monitor

The Open Energy Monitor uses a current transformer, a clamp to measure the electrical current flowing through the power cables going to the computer.

Advantages
  • Open Source / do-it-yourself: we can make them ourselves and contribute to the project
  • Works on Windows & Linux
  • Arduino compatible
  • Community & sustainable energy project
Disadvantages
  • The accuracy goes down for power consumption below 100W (see here).
  • Requires to split the electricity cable and wind one wire around the current transformer (see the brown wire in this photo). It's not something everyone will like to do.
  • Cost: approx. 150 euros + extra soldering work

OWL Intuition-e

OWL produces a home energy monitoring solution.

Advantages
  • Not too expensive 60 pounds, or 71 euros
  • Phone app
Disadvantages
  • May have the same accuracy problems as the Open Energy Monitor.
  • Requires to split the electricity cable and wind one wire around the current transformer.
  • Closed protocols for data upload? (to be verified)

Ambient temperature sensor

The ambient temperature sensor is used to get an idea of the room temperature. Temperature sensors are fairly low-cost sensor. However, the difficulty is to find one that is cheap, that plugs into a PC, and that works with Windows and Linux.


TEMPer

Advantages
  • Price: 10 euro
Disadvantages
  • Windows driver installation?

Arduino + TMP36

Arduino is the combination of a small development board with an Atmel microcontroller and an easy to use development environment. The TMP36 sensor is a cheap, analog temperature sensor.

Advantages
  • Open Source / do-it-yourself
  • Works on Windows & Linux
Disadvantages
  • Cost: approx. 35 euros

USBTemp

USBTemp measures the temperature using the DS18S20 sensor and an ATMega168 micro-controller (used also by the Arduino). It connects via USB to your computer. For details, see the following pages: gonium.net and mikrowerk.

Advantages
  • Open Source / do-it-yourself
Disadvantages
  • do-it-yourself...