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Design output circuit includes a drive relay, buzzer driving thunderbolt lights, seven-segment LED digital tube, BCD DIP switch, button switches, the program is 5 Marquee, 4* 4 keyboard and seven-segment LED digital tube program 6 is involved in a variety of interrupt program 7 interrupt and polling flashing lights, frequency generator, frequency meter and watchdog timer, the program involves 8-point pass each other, multiprocessor communication program involving 9 simple flower, be happy player, happy birthday song, etc., involved in the program 10 generates a drive signal delay subroutine, the timer generates a drive signal. ADC program involving 11 temperature test program involving 12 program LED dot matrix LCD character display program involving 13 and custom character pattern