The PCS Scenemaster

Posted on Feb 7, 2014

The PCS SceneMaster Model LM4LS2 was won from Home Automator Magazine for `Best Web Site` and was installed during the spring of 1999. This controller is capable of ramping lights on and off, and `scenes`. This is where a single X-10 command can produce a combination of lighting levels. These light levels can be achieved with programmable ramp rat

The PCS Scenemaster
Click here to download the full size of the above Circuit.

es. I have a location in my home where four lighting circuits are controlled. In the past, three of these have been controlled by standard X-10 wall switches. The fourth one was a bank of fluorescents, and it was not X-10 controlled. This location controls lighting that covers a majority of the open design of the living space, and is the logical choice for the SceneMaster. I wanted the fluorescents to be controlled also, but connecting them to the TRIAC output of the SceneMaster is risky. I therefore chose to add a relay to the SceneMaster. The coil is wired to `Load 4`, and its output is connected to the unused contact on the barrier strip on the back of the SceneMaster. The relay is a four pole, double throw, and fits inside the SceneMaster. The whole package is quite tidy and self-contained. Three poles of the relay are used in parallel to share the current and to provide redundant contacts. The fourth one is left for a spare contact in case the other three fail. If that point comes I can then temporarily wire to the fourth one to get the circuit operational again, buying me some time to think up a long term solution. In addition to three poles sharing the current, I added an MOV (Metal Oxide Varistor) surge suppressor across the relay contacts. One operational restraint is that this circuit is not allowed to be dimmed. When the `Load 4` circuit is dimmed, the relay buzzes loudly in the transition range between bright...

Leave Comment

characters left:

New Circuits



Popular Circuits

Stepper Motor Encoder Circuit
Low voltage lamp flasher
Fuzz circuit
ESR Meter
Mesa Mark IIc+ Preamplifier
traffic light
am transmitter circuit
ham radio circuit audio filter
Low Battery Indicator II
Capacitive Touch Sensor
60kv ignition coil driver circuit
AN6610 Application Circuit
Lithium battery charging constant current circuit diagram