说明：  程序名称：TLC5615 实验现象：电机速度由快到慢循环运转。用万用表直流电压档观察VOUT（D10），电压连续循环高低变化。
(Program Name: TLC5615 experimental results: motor speed from fast to slow cycles. DC voltage with a multimeter, observation of VOUT (D10), a continuous cycle of high and low voltage changes.)