… to realize the volume control via the microcontroller, a “digital potentiometer” X9C102 was simply used. It is controlled directly by the controller with a “direction input Up / Down” and a “count input”. Internally, this IC consists of 100 resistors connected in series whose “tap” is determined by counting input. So a simple matter…
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THE IDEA FOR THE PROJECT A project idea that came to my mind as an ideal apprentice project is to plan and build a radio receiver. With this project, our apprentice should apply the acquired skills in a practical way and set up an FM radio receiver according to the components to be used. This…
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One project that had long been of interest to me was the detection of radioactive radiation. After the horrible powerplant accidents in Japan, this idea was recalled. I could still vaguely remember owning an unused counter tube somewhere in my old workshop cellar. – After some search it turned up :). Thanks to the Internet…
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At the beginning of my blog, I talked about a small project with an oscilloscope tube. Since there are still pictures in the archive, I do not want to withhold it from the blog here: Cathode ray tube with high voltage generation A cathode tube (Braun tube) consists of an evacuated glass bulb in which…
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From a McDonnel F101 Voodoo came the following sample that I got from a customer back then, with a request to try to bring it back to life somehow. The thing I’m writing about was a black cylinder about 30 centimeters long and about 20 centimeters across. On one end face of the cylinder was…
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the finished machine As a gift I received in the winter of 2014 a kit for a model of a Stirling hot air machine. The design plans, as well as the largely prefabricated parts, come from Mr. Klaus Künneth, the operator of the website www.kk-stirlingmotor.de To build and install only a little…
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… or in short words, too much current flows through a too thin wire, then it can get very hot. How that looks then, you can see very well in the picture. The insulation of the 1.5 mm² stranded wire has completely dissolved in smoke here in the area of the terminal … So you…
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While browsing the digital archives, I noticed the following pictures again. Meanwhile, more than ten years have passed since I had to initiate the end of the television repair shop. Look in the old workshop Almost at the same time as the widespread use of flat screen televisions, orders were down. Except for a few…
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In 1985, the company Sony brings a small, compact and above all mobile TV on the market. The Watchman Voyager FD20-AEB. It has been designed to be used everywhere. For example, in the car, on vacation, just everywhere. It is not a TV with LC display, or TFT, or LED display. No. The TV brings…
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A trend of the 80’s were mobile video games. As in the Gameboy, PSP and in the meantime also smartphone times, it was quite practical to have a small, compact game console with you as a young person. As an example, I dug up one of these “mini consoles”. It is a popular video…
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