Recent content by khearn

My house has a gravity hot water recirculation system. No pump required. It has a return pipe from the highest faucet in the house. All of the hot water pipes are insulated except for the last several feet of the return. So that bit cools down just a tad, becomes denser and flows back down into...

From having done a lot of reading of the Insteon Developer's Manual lately, the whole i2 thing is a bunch of new Insteon commands that require extended messaging, which was not supported on previous Insteon devices. The key thing I've seen is that on all existing Insteon devices, to read/write...

But was that 25 different etchings, or all 25 the same? How much would it be for 1 "Kitchen", 1 "side yard" 1 "back yard", 2 "stairs", 2 "Keith's Office", "1 Véronique's Office", etc. ? That's not to say that one can't get one-offs done locally for a reasonable price, but I doubt you'll get them...

Here's a design I just found by a student at UNLV. He's got the schematics and some of the math, but not the code. http://ncacm.unlv.edu/HTML/seminar/senimar...eniordesign.pdf Keith

Looks nice. The thermostat display goes up when pressing either the up or down button.Should "Movie Time" also close the drapes and turn down/off the lights? Keith

I'm working on a HVAC control system for a house that was built in 1937. The ducts were obviously not designed for zoned control, and I don't want to mess with them because there is some asbestos insulation. So I'm planning on adding servos to control the individual vents. I'm concerned about...

Rocco, Yeah, Zigbee looks nice, but I don't want to wait for it. I need to find something that is out now, or at least will be out in a month or two. After months of complaining about the time I've been spending on designing the circuit for a temp/humidity sensor with an LCD display for HVAC...

Chris, The Vizia RF serial gateway sounds really promising, but I'm having trouble finding any info about it at all. I can find it available for preorder from Automated outlet, but they don't seem to have any info other than that it's an " RS232 ASCII Interface". I can't find any mention of it...

I'm starting on building a homebrew Linux HA controller, based on the TS-7400 from Technologic Systems. I'll be writing my own code, which seems to be a problem when it comes to using some HA systems. It looks like Z-Wave requires one to buy their development kit for a few thousand dollars if...

Did your PLM come with any documentation on the command set it uses over the serial connection? I'm setting up an ARM-based Linux system-on-module to use as a homebrew HA controller, and am very interested in connecting it to a PLM if I can find out how to talk to it. I've already got it...