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This article describes the history and evolution of oscilloscope technology. Hand drew oscillograms The earliest method of generating an image of a waveform has been through a tedious and cumbersome process of measuring the voltage or current of a spinning rotor at particular locations about the rotor axis and in consideration of measurements with a galvanometer. By slowly … [Read more...] about What is the History of Oscilloscope?

Often, the difficulty in choosing between alternatives far outweighs that of finding an option that will best serve a particular purpose, especially where the alternatives all seem good for that same task. Here, there is the question of which square to use for your projects, or rather, which square is the best for your project. As a woodworker, You'll find many types of … [Read more...] about How to Choose Between Speed Square and Combination Square?