The DT-03 portable stroboscope uses a high-speed and high-performance single chip as its core processing unit, a special display chip to drive the LCD to display the ?ashing times per minute and a special data-chip to store system working parameters. It has such functions as internal/external triggering selection, frequency doubling and halving, and trimming of external triggering frequency and triggering phase. In addition, to extend the service life of the lamp ,the function of automatic stopping of ?ashing is designed.