The oscilloscope is one of the most important tools to be used by any electronics hobbyist but not everybody can afford to have one. As commercial scopes are often too expensive, almost every electronics hobbyist thought a certain time to build one from scratch. The classical oscilloscope (cathode ray tube) is difficult to build at home because of its size, mechanical fragility, high voltages presence, etc. An alternative solution is the modern "PC oscilloscope", having the advantage of post-processing and recording capabilities, and kind of reduced complexity. However, this solution is often non-portable, expensive (requires an PC) and dangerous for the PC if not isolated from it s chassis. The third solution, commonly used these days by all commercial oscilloscope manufacturers, is the digital oscilloscope with LCD screen. Therefore, the authors decided to use this solution, and tried to develop it using common parts from today s component retailers.-The oscilloscope is one of the the most important tools to be used by any electronics hobbyist but not everybody can afford to have one. As commercial scopes are often too expensive, almost every electronics hobbyist thought at a certain time to build one from scratch. The classical oscilloscope (cathode ray tube) is difficult to build at home because of its size, mechanical fragility, high voltages presence, etc. An alternative solution is the modern "PC oscilloscope", having the advantage of post-processing and recording capabilities, and kind of reduced complexity. However, this solution is often non-portable, expensive (requires an PC) and dangerous for the PC if not isolated from it s chassis. The third solution, commonly used these days by all commercial oscilloscope manufacturers, is the digital oscilloscope with LCD screen. Therefore, the authors decided to use this solution, and tried to develop it using common parts from today s component retailers.