This article celebrates in 2008 the 45 Years of the invention of PAL as well as to give an appriciation to the german television pioneer Prof. Dr. Eng. Walter Bruch, known as Papa PAL, Mister PAL or even among us collegues PAL pal . This document was first composed in German for the German magazine Funkgeschichte (Wireless-History) No. 174 Octob
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er/November 2007, written by Wolfgang Scheida and published by Gesellschaft der Freunde der Geschichte des Funkwesens Society of Friends of Wireless History. Follow me now as we celebrate in 2008 the 45th anniversary of the invention of PAL and express our appreciation to German television pioneer Prof. Dr. Eng. Walter Bruch, known as Papa PAL, Mister PAL, or even among us colleagues as our PAL pal. The 40th anniversary of PAL color television is a major event. The introduction of this color televisionstandard was a milestone for European technical innovation and economic influence a milestone that television historians want to celebrate one last time. Let`s go back now to the time when the West German foreign minister and vice chancellor Willy Brandt (the former major of Berlin) symbollicaly pushed the red start button at the International Radio Exhibition on August 25th, 1967 in the western part of divided Berlin. Initially, the world of colorized television looked quite simple. In postwar Europe, a saturation of the black and white television receiver market appeared likely to occur by the end of the 1960s especially in England. For this reason, efforts were begun from 1956 [1] onward to bring color to television screens in the old world. The first steps toward this goal were already taken when a common 625 line television standard was adopted in countries like Great Britain and France. After a long period of...
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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