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
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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...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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