I’ve been monitoring my whole house power consumption for some time using a currentcost meter, connected up to my home server. However, I’ve been meaning for a while now to pick up a meter for measuring the power consumption of individual devices to help me fine tune my power consumption. This week my local Aldi were running a special offer of a (fairly sophisticated) meter for £8. Turns out that it can measure voltage, current, mains frequency, power consumption, and power correction factor, which indicates how efficient a device is. Since then I’ve been wandering around the house measuring things, trying to work out what we leave running all the time that we actually need to turn off.
So far I have been unable to find a single “wall wart” adaptor that uses *any* measurable power when idle, despite the media talking about how we should all go around and disconnect them all. Things like my powered speakers for my laptop however, draw 10w all the time. Ooops.
And while I was in Aldi I also picked up one of these blood pressure monitors too. I wasn’t sure how accurate it would be, but on trying it out, it seems to give approximately the same readings that I’ve seen the nurses record during my hospital visits. So it may well be surprisingly accurate.
However, my view is that I’m less interested in the actual readings, and more interested in any marked changes in the readings; because if I see any significant increase or decrease then I’ll be needing to go visit my GP anyway.