Currently there is a great need and it has arouseda n interest to design and build new prototypes of eq uipment used in the teaching of physics. Most of these designs resort t o the benefits that offer PIC microcontrollers. Thi s work aims to designing and constructing a digital chronometer. I n the design and construction of the equipment, ess entially two components stand out: one of programming and another of circuitry; as an essential element in the comb ination circuitprogramming, a commercial PIC16F877 microcontroller is used. The program is structured so that the mic rocontroller receives a signal from two-buttons (Start or stop), processes the information, and shows the data in 4 displays of 7 segments (with decimal point) of common cathode.