Abstract

• Microcontroller based game time clock was constructed for three games. The first one is chess game, the second one is crossword game and the last on is stopwatch (game of go). There are two types in chess game. The first chess game time clock is a “sudden-death” contest with five minutes for each size. The second chess game time clock is a dual counter mode. In dual counter mode, the chess game time intervals can be chosen by the player. In crossword mode, game time clock shows the over time condition by blanking on the appropriate players LED. In the stopwatch mode, the exact time of event especially sports event can be measured. In game time clock the main controlled device is PIC16F887 microcontroller and its software is written in assembly language. The other devices are 7-segment LED, transistor and counter.