Measuring vibration is a common way of error detection or abnormal device behaviour in industry systems. For the purposes of this assignment we presented the basics of vibrations and described the method of vibration data processing and their graphic display on the computer. We presented the importance of digitalization and signal conversion. A cheap measuring system was developed for measuring, proccessing and displaying vibration data in real time. The data acquisition was performed with Arduino microcontroller. Proccessing and display of the vibration data was performed on a personal computer with MATLAB software package. The measuring system was initially tested in a controlled environment in the laboratory. After successful tests in the laboratory the measuring system was used on a working machine. The results obtained were suprisingly accurate with regard to the capabilities of the measuring system components. Finally, we identified the maximum sampling frequency and analyzed the impact of the uneven sampling interval.