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I suspect the major difference would be in the quality (accuracy) of the current sensor. The other issue would be that they would have to measure the phase angle between voltage and current for the power factor and depending on the A-D accuracy and the number of samples per second would affect...

looking at the diagram for the Brultech device, the wall wart would supply both power for the device and measure the line voltage as there is no other electrical connection to each leg, just current transformers. This is a smart way of doing it as the interface itself stays as a low voltage...

wikipedia has a good description of PF here http://en.wikipedia.org/wiki/Power_factor

i keep promising soon but unfortunately it is a side line to my main business and it always takes longer than expected. You can read some of the details here http://www.cocoontech.com/index.php?showto...amp;hl=brightan I have had working hardware and software in place for over 5 years and this...

The best part about any lighting system is the dimming, especially the soft on/off features and having a scene dim lights over time. I have done a number of DC systems and will have new hardware coming out soon that will work on either AC or DC systems.

I installed a full 4" PVC plumbing pipe from my HA room to the attic and it has worked out great! I have run many more cables down there that I never expected to need (of course!). The other nice thing is that either it is smoking hot up there or freezing cold (where I live), and you'll want...

I just installed it last weekend so we're talking 6 days at this point

that's typical, the Canadian dollar is at par with the US and yet we still pay $100 more...

I just finished installing a 9 camera system from Q-See (QSD6209C9-250). 9 color cams with IR, 250G HD in DVR unit with motion recording and internet connection for remote viewing. It was on sale for $800. Although this is definitely not a commercial unit I am not disappointed with what I...

you answered for me before I had a chance, and in fact, you're right. This was not a home automation project, it was for controlling a light in a commercial office and there was 100's of them and I wanted to make sure in was certified for insurance reasons (it was for the USA after all!). In...

poing

have you seen these? http://www.evolutionmodeltechnology.com/Pa...%20Turrets.html

is this a grassed area? Do you have an automatic sprinkler system? Can you add a few more high flow heads? :P

The Nuvo systems (at least the Concerto) use a single Cat5 to a hub type device that then goes to each of the individual keypads. Is that what you are after?

I am going to make a bootloader freely available for the microprocessor. This will allow the firmware to be downloaded across either the CAN network or the RS232 port (which means USB or ethernet if you are using that module) The firmware is already done and has been in use on older boards for a...

here's a sneak peek at the new boards (Project Prometheus) The major features are: - 50 I/O lines - 2 Xpansion ports with your choice of plug in modules for RS232, USB, Ethernet, XBee - mounts in plastic case, Leviton mount or on standoffs in standard home automation cabinet - User downloadable...

that's actually a very valid point. Where I live we have relatively low electrical costs (.08) and we do require heat for half the year and in the summer it is light out till late in the evening, so I wonder if there would really be any cost savings. I guess I also wonder if heating a house...

I'm going to stock up on enough incandescents to last me till I can replace them with LED lights when they will eventually be affordable. I refuse to use CF for too many reasons to get into (and I think its been debated around here before)

it's funny that you would mention this because I did decide to go the open source way but haven't said anything yet as I have a few details to work out first.

Is there a standard mounting method between the different manufacturers? Is there a spec available somewhere? (what is CV, BTW?)