Home Automation EZine
Volume 3 Issue 3
June 1998

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Uncle Phil Part IX
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pcslighting.jpg (15172 bytes)
by A.Ron Carmichael

"PCS (Powerline Control Systems) makes a specific X10 switching device that controls 4 different X10 addresses/circuits, and mounts over a double- or triple-gang box. The device is model LM4L, controls up to 2000 watts total (max of 1000 watts on any one switch), intended for incandescents and low-voltage lighting transformers, and works quite nicely"

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A.Ron Carmichael

Read My Biography


I had a unique opportunity to select a lighting control system in my house - We had been planning to build a house for about 5 years, and we got to the blueprint stage and I knew that I wanted to have something beside standard wall switches - something that controlled "the house", not just the "lights". I talked with Richard Scholl at Worthington, and decided on using digital wall switches so that each single gang box could provide control over a variety of devices in addition to lights. At that time, the switch with the most potential was the Geffen Controller. But I knew there was trouble when I went to Dallas to the home automation convention (about 2 years ago) and Geffen was a no-show. Back to the drawing board with Richard. He sent me a Neltech keypad to examine, and I decided that it was going to fit the need. Each Decora-style Neltech ( model 6D3+6) I used has 6 buttons, is a model with small green LED lights marking each button as well as three at the top (green/orange/red). When connected to a logical controller like my StarGate, the LEDs can be controlled independently, and serve nicely to locate the buttons in the dark. You can also use the LEDs to indicate off/on status of each/any device in the house, armed/disarmed status of security systems, indicate whether garage door is open, etc...

The Neltechs require most of the wires of two runs of Cat5 to be able to address all of the functions, and connect directly to the digital connections of StarGate, which also provides the power for the switch. I ordered the blank white buttoned Neltechs, and have used a Brother labeler to print 3-letter labels to cover each button. I was reluctant to have them engraved permanently until I was sure that the duty of each button wouldn't change. The wires have plastic connectors for easy removal of the unit, and I know that the little jewelry store kiosk at the local mall does engraving cheap, so I'll get that job taken care of some day<G>. (Doesn't the list ever get shorter?) But going back to the subject of lighting...having decided how to generate a signal, I needed to choose the actuator for responding to the signal. Again with help and advice from Richard, I decided that since the electrical wiring hadn't been pulled yet I could be a little flexible. I had the electrician pull all of the switch legs for the lights into specific locations such as the pantry (for living room/dining room/kitchen), a hall closet (for one bathroom/bedroom), the utility room (for all outside lights), and the master bedroom closet ( for master bed and bath). PCS (Powerline Control Systems) makes a specific X10 switching device that controls 4 different X10 addresses/circuits, and mounts over a double- or triple-gang box. The device is model LM4L, controls up to 2000 watts total (max of 1000 watts on any one switch), intended for incandescents and low-voltage lighting transformers, and works quite nicely. They feature an easy-on that reduces burn-out, where the light comes up from off to full bright in about half a second. This ramp-up is noticeable but not negatively slow in an aesthetic sense, and I have not had to replace a single light bulb served by these devices. Likewise they fade off rather than abrupt action. The LM4 also can go from OFF to a percent level directly without first going to bright. You can have them retain a preset level and then go back to the level when an "on" is received. With StarGate I have found it is best to issue "pre-set" commands rather than simple "on" commands, to insure I get exactly the degree of brightness that I want for a given event. Finally, the LM4 responds to All units Off, All lights on, and all lights off, and you can use advanced programming of the unit to IGNORE one of these commands if you want to immunize a circuit from ALL off, for example.

Of course, I have a Leviton whole-house surge supressor installed, as well as several X10 noise filters (one on an electric blanket for the SO, another on the Kenmore refrigerator that turned out to be one bad noisy boy, X10 noise-pollution-wise), and a bridging amplifier for the two phases of 110v. Don't automate home without these!

In all, I installed nine LM4s, controlling lights throughout the house. In the year since, I have had two identical problems where one circuit of an LM4 stopped responding. One locked into an on state, the other an off condition. In both cases PCS proved to be completely responsive and repaired them and returned them to me in a timely manner, so I have no complaints. One cannot reasonably expect indefinite infallibility in electronics so I've learned to really value good customer service. I've installed a variety of other X10 switches, for example a 4-way hallway circuit, and a couple of single-light wall switches sprinkled around the house. These serve as a safety measure in the event that for whatever reason my central system (StarGate) is down. I don't view home automation as being infallible, and I have been known to make a mistake or two in programming (<G>), so both my SO and daughter (and myself) feel better having a few good old-fashioned paddle switches at hand. Lights can be controlled in our house using the Neltechs (there are 8 in my house including one weatherproof model), using any phone (one of StarGate's built-in virtues), using Leviton RF remote controls, and of course, the paddle-switches. I bought a copy of both HAL2000 and HomeVoice in the hopes of adding voice control to the system, but haven't gotten reliability to an acceptable level yet. And after that, of course, we will be looking at the new user-interface product inspired by the justice department's investigation of Microsoft - called Mindreader 1.0. Apparently Bill Gates felt the need for this product during his meetings with congress, and with it I'll be able to just THINK my lights on! Stay tuned for developments.


Meet A.Ron Carmichael

I was born in a log cabin in.....waitaminnit, wrong story. Okay, I'm from south Texas, Uvalde to be exact. Mah forbears arrived in Natchitoches around 1843, and have settled in various parts of Texas since then. I've lived in San Antone, Dallas, Round Rock, and Austin since college, and find the hill country to be nearly perfect for my lifestyle, so we are building a nice home in Lago Vista, 18 miles from downtown Austin. Kind of like having yore cake, and french fries too.

I grew up in a real Rexall Drug Store in Uvalde, complete with soda fountain and small-town benefits. Somehow I remained sane and gradjiated High School in 73'. I stayed in Uvalde for a couple of years, attended a junior college, and got most of my pharmacy pre-requisites out of the way. I also got a first degree brown belt in TaeKwanDo and Kodokan Judo from sensei Lonnie Green, largely as self-defense from all of the republicans that I matriculated with. (Enrollment was about 1000 people: 999 rednecks and me). Somehow I was able to graduate from the University of Texas in1978 from College of Pharmacy with a B.S. (seemed a fitting term, somehow). I spent my last year in San Antone at the UT HSC where I received clinical training as a hospital pharmacist.

I have practiced pharmacy in independents, chain stores, apothecary, large hospitals (>600 beds) and small hospitals (<100 beds). Also directed the services for a small hospital for 4 years, and learned to design databases and build/program computers in my spare time. Co-authored a dynamic comprehensive pharmacy management system called Rx-Link , using DataEase for DOS, a 4th-generation relational RAD tool (See Periwinkle's page for DataEase info). RxLink is perhaps the largest PC-based computer tool for running a hospital pharmacy, in terms of reports and features.

I currently provide custom programming solutions and training in PC operations. I've logged more than 1.5 million miles with American Airlines, am a life-time gold member with platinum membership in AA, Marriott Marquis Platinum, gold standing with Hurts, er, Hertz., traveling to hospitals around the YewEssHay and Canada. I've personally trained pharmacists in more than 100 hospitals and analyzed pharmacy practices in those hospitals in order to customize their softwares. I am a technofreak, believing that if it is new and technical, it must be better, and if it doesn't turn out that way then it was incorrectly documented and improperly implemented. Two books I think yew should read: High Road(Ben Bova) and Diamond Age (Neal Stephenson).