Digital Command Control, for those who don`t know, offers many advantages over conventional DC analogue control systems. The main one being the simplicity of wiring. DCC allows one to control many locomotives individually on the layout without having to electrically isolate parts of the track. The only exceptions being the number of locomotives dr
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awing current from the track and reverse loops. I wont go into too much detail here since there are plenty of other web sites devoted to this. For the layout I`ve adopted a "Bus" wiring method whereby a pair of wires carrying the DCC power/signal (the bus) is run around under the layout and tapped with feeds from the track. No particular reason for using speaker wire other than that it seemed silly to go out and buy special wire when I had great knotted balls of speaker wire cluttering up the wardrobe. If I was buying wire specially for the job I would probably use black and red pair, thick for the bus and not so thick for the feeds, just to make it easier to identify which rail is going to which side of the bus pair. As it is the feed wires are a little thick and obtrusive where they are soldered onto the track. The Pug disassembled. I had to cut the weight horizontally from front to back then cut the top piece down to fit the decoder in. The decoder is a Digitrax DH121. If I was doing it today I`d use a DZ123, which is a quarter of the size and has ample power for a little Pug. I mounted point motors under the baseboard rather than directly to the bottom of the points. This initially presented some problems because firstly the actuator pins were too short and secondly it was very difficult to line them up with the point. I extended the pins by crimping some 1. 2mm piano wire onto the pin with some 3mm brass tubing (sorry,...
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....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
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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