4 ms·
It can be done relatively cheap by reverse engineering a $15 power meter you get at home depot and combining with $10 worth of electronic parts and a $20 Arduin
by joelhaasnoot 16y ago
It can be done relatively cheap by reverse engineering a $15 power meter you get at home depot and combining with $10 worth of electronic parts and a $20 Arduino. Was a college project, and we blew up 5 meters before it worked. Working with 220V (or 110V) right next to 5V can be dangerous and not an easy "electronics problem".
- brianwhitman 16y agoit is my understanding that Wattvision taps the entire electrical system via the meter, not just a single outlet like a $15 "kill-a-watt" style power meter will.
- joelhaasnoot 16y agoThat's true, but you need a combination of the two: both general and appliance-specific measurements. Like the post says: it's hard to figure out where power usage is coming from. If you have more specific data and combine it with simple switching, you can achieve a much better awareness and higher savings. And the hardware doesn't have to be expensive as the "kill-a-watt" devices show.