Category Archives: Anything

Due to some national holidays we had four free days. Ant the mother nature decided to show us some heat. In the shady spot it was about 30°C, ant the thermometers on the sunny side were “overloaded”. Reader must understand, … Continue reading →

I found nice VFD display on one 5.1 surround sub-woofer. It was quite big, powerful sound system with some indicator to display signal spectrum. I removed indicator and become suspicious- the device was too simple to be real. After looking … Continue reading →

New stuff was found in trash, so salvaged power amplifier from old tape recorder. It is made with with dual EL84 (6BQ5, 6П14П) tubes. One funny thing about this PCB. The tubes and most of components are made same year … Continue reading →

Sometimes I need small high voltage power supply for my projects. And I don’t want to make special transformers. And I don’t want to use special chips for it. In internet I found very simple circuit diagram for classical step-up … Continue reading →

My brother presented me old radio tube datasheet book. In his Antique Shop you can find interesting stuff and for electronics hobbyist. Also he gave me very old radio tubes dated 1920…1930 years! With very strange base connectors and heating … Continue reading →

In eBay I bough quite powerful Peltiers (TEC, Thermo-Electric Cooler) unit. According to description it is “TEC cooler – Thermal Enterprises model CP1-12726”. Specifications: Model CP1-12726 50mm x 50mm x 3.64mm 245 – 320 Watts of cooling power Operates from … Continue reading →

Recently I found plugin for CadSoft Eagle PCB software. Together with freeware ray-tracing software POV-Ray it produces 3D images of PCB boards. It looks like nice illustrations for PCB assemblage instructions. You can see how your board must look like. … Continue reading →

Just few experiments in Mythbusters style. It is funny experiments with short circuits, high currents, flames and fumes. The voltage is lowered, but current is more than 200A. The test device schematics looks like this: welding transformer with fuse and … Continue reading →

System: Windows XP Pro SP2, P4, PCIe system, Radeon X700 with dual output. Image on single monitor. Please remember the image ratio. When I move image to the left and the bigger part of the window is in the left … Continue reading →