The Internet Power Line Adapter - University of Queensland
The Internet Power Line Adapter - University of Queensland
The Internet Power Line Adapter - University of Queensland
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Home Automation, <strong>Power</strong> <strong>Line</strong>s and the <strong>Internet</strong> Quenten Alick<br />
converts it into a CEBus compliant analogue signal. This output signal is in the<br />
form <strong>of</strong> the chirps mentioned earlier. However, it is not possible to directly<br />
couple this signal to the power line power signal. It must first be filtered and<br />
amplified before it can be coupled. <strong>The</strong> P111 is responsible for the amplification<br />
<strong>of</strong> the output signal. Discrete components are used to filter the input from the<br />
P300 to the P111 as well as the signal from the power line, which is sent directly<br />
to the P300.<br />
Figure 4-1 P300 Evaluation Board<br />
4.3 <strong>Power</strong> Measurement & Switching<br />
Proper measurement <strong>of</strong> power for an appliance can be a difficult proposition. An<br />
entire thesis could be written on the topic <strong>of</strong> accurate power measurements itself.<br />
For this reason, a relatively simple circuit was designed to measure the power<br />
consumed by the appliance connected to the adapter.<br />
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