It is interesting to note how easy it is to recognise some specific appliances.
- Fridge - 35-40 cycles throughout the day. The fridge's square power draw is clearly visible throughout the night, and at various points throughout the day. However, it is less obvious in the evening when many other appliances are operating.
- Kettle - 10.00, 13.00, 17.30, 19.00. The kettle is distinguishable by its power draw of 2.5kW and its short duration for 2-3 minutes.
- Washing machine - 13.00, 15.30. The washing machine has an alternating power draw between 600W and 0W for its 1 hour cycle duration. However, it also has a solid power draw of 2kW for about 20 minutes.
- Oven - 18.30-19.30, 21.30-22.30. The oven's temperature is regulated by a thermostat so its power draw predictably alternates between 0W and 2kW. However, there is a period while it initially heats up to temperature when it is on continuously. For the first use the temperature was set to 170 degrees, while for the second use it was set to 110 degrees. This is reflected by the duration between 'on' cycles, similar to Alex's fridge's behaviour.
It is also interesting to analyse the lighting circuit's power draw. Since each light only has two states, 'on' and 'off', techniques such as steady-state analysis or combinatorial optimisation would work well here.