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- 利用AT91SAM9261芯片，采用PWM调制控制8盏灯的渐暗渐灭。脉冲调制宽度为20ms，8盏灯亮灭的周期分别从1.0S到1.7S-Use AT91SAM9261 chip, using PWM modulation control eight light fades gradually eliminate. Pulse width modulation is 20ms, 8 lights were blinking cycle from 1.0S to 1.7S