The oscilloscope is one of the key instruments of any radio engineering laboratory for industrial use, as well as a conventional radio workshop. With the help of such a device, it is possible to determine malfunctions of electronic circuits, as well as to debug their work when designing new devices. However, the price of such devices is very high, and not every radio amateur can afford to buy such a little thing. This article is about how to make an oscilloscope from a computer. There are many ways to make such a device, but the basis is the same everywhere: the PC sound card serves as a card that will receive pulses, and a special adapter is attached to it. It serves to coordinate the levels of the measured signals and the input of the computer's audio card.
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Such an oscilloscope is not elegant, but a simple circuit solution will allow you to achieve a wide range of measured voltage. The mentioned device will help in the repair of audio equipment or can be used as a training measuring device.