After the self-made Geiger Müller counter and the associated experiments, I noticed that there is one or the other radioactive element in our environment.
With the SOEKS 01M Geiger counter, an industrially manufactured device, I have now again “scanned” objects in the area.
Again, I realized that some of the old clocks in my collection are equipped with radium-painted dials. The SOEKS shows here a radiation exposure of about 1.11 microSievert per hour. The environmental load is displayed at approx. 0.14 uSv / h.
But in my mother’s kitchen, I found a beautiful, colorful old vase that displayed about 10uSv / h. (The thing is now in the far corner of the cellar).
It should be uranium paint. (To see orange / red painting in the video below)
In the last two days we received a visit from two young gentlemen from the fourth year of the Villach High School Sankt Martin. Mr. Martin Ungermanns and Mr. Fabian Treu came to us as part of a “taster program” of the middle schools. The two students can participate in the “world of work” and get some insights into the technology.
The program included work such as assembling and soldering of electronic kits (the well-known shaker cube), a small series work (flashing of PIC microcontrollers), exposure and etching of circuit boards, milling of aluminum plates.
As conclusion of the two taster days both high school students were allowed to build up a complete “device”.
It was a “clap switch kit” that detects a loud sound event via an acoustic sensor and then turns on a relay contact. So that this circuit can also be used meaningfully, the circuit has been extended by a self-made power supply, all installed in a plastic housing and equipped with power cable and Schuko coupling. So any consumer (eg a floor lamp, TV) can be switched on and off with this switchgear by simply “clapping” …
It’s time! The first picture of the absolutely real wooden housing for radio electronics is here. A beautifully crafted housing made of glued elements. This work comes from Gebhard’s hands, a master carpenter from the Upper Carinthian region;)
Jetzt kann das Nostalgie-Radioprojekt wieder einen Riesenschritt nach vorne machen.
The case is on our table. First, the holes for the speakers were drilled. Later these should be covered by a milled aluminum panel. So the next step is to construct the milling data for the front panel. Here again the layout tool “Eagle” is used. The data can simply be exported as a “.dxf” file and imported into the circuit board plotter software.
Barely a few minutes, I went to the circuit board plotter, imported the production data, clamped the “two-cutter cutter”, of course, the aluminum blank and off we went.
The speed for the 1mm cutter I have chosen with 60000 rpm and set the feed rate to 1.5mm / s in both axes. Cooled and lubricated was the way with alcohol.
A not negligible amount of work is, by the way, the cleaning of the plant after the work done … 🙂