The circuits on this page are basic designs for `Diode Matrix` switch machine control systems that can be used to operate `Stall Motor` switch machines in `Ladder` type storage yards or other multiple turnout areas. The principle for these diode matrix circuits on this page is very much the same as for those used to control twin coil type switch
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machines except that the diodes handle much lower currents. The following diagram is for the circuitry of the 556 - Switch Machine Drivers. On the Diode Matrix system schematics these circuits are represented by a logic block diagram in order to simplify the diagrams. Tracks 1 through 4 are selected with the appropriate push buttons. This in turn SET`s or RESET`s, through the diode matrix, the appropriate switch machine motor controller to its "N" or "R" condition and operates the turnouts. Included in the diagram is a "Truth Table" that shows the position of each turnout for the particular track that is selected. The "X" or "DON`T CARE" symbol means that it does not matter where that turnout is lined to if track 1 or 2 is selected. In the following diagram; extra diodes, as indicated by the dashed lines on the schematic, have been added so that the turnouts above a selected track are moved to their "N" positions when the lower track`s button is activated. This means that if a double ended yard had separate matrix circuits at each end - these could be connected together so that both ends of the yard could be operated from the matrix selector at either end if desired. When the tie switches are open the turnouts at the each end of the yard are operated by their respective matrix systems. When the tie switches are closed the turnouts in the yard can be operated from either end. Two options for connecting the separate matrix...
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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