Hello!
I'm thinking about a new project, about monitoring AC power lines, in industrial environment (tipically AC 220@50Hz, hi current...).
I have some little experience with owfs, and I'm reading this list from a lot, so I was thinking about a solution with a linux based small hardware (like raspberry or arduino or odroid, ecc).
I remember I read something like this, maybe with DS2450 (no longer available?) or also with DS2438. But I don't know how this is applicable, for the measurement and for an industrial production area.
Can be better to move to i2c? I've seen some "power and energy measurement IC", even from Maxim, with I2C bus, but it will be totally new for me.
And, to make more complicated all, I must admit that I'm not so strong on the electric/electronic side... :)
Any suggestion will be very appreciated
I have DS2423(actually a clone of this chip on Attiny45) and w phototransistor that reads blinking of home energy meter.
Similar to this http://www.bwired.nl/How_stroom.asp
When dealing with mains voltage you should be careful. I would suggest to buy an energy meter with pulse output, they are relativity cheap(~$30) and connect the output through some optoisolator to DS2423 so you can monitor kWh used.
http://www.eltrox.pl/kalkulator-energii-orno-or02y-1-fazowy-p-3570.html
There are also energy measurement chips that have pulse or spi output that can be look at Analog Devices. Those chips can use a shunt resistor or a current transformer but you have to design and build your own circuit. I even wanted to build one from scratch but to get a reasonable range form low currents to big currents you have to use the coil.
http://en.wikipedia.org/wiki/Current_transformer#Safety_precautions
Here is a teardown of a power meter
http://www.youtube.com/watch?v=dm-yZ1N3xmc
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p4trykx
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