EASY5509 timer experiment can be seen on-board light-emitting LED L12 flashes flashing.
说明：EASY5509定时器实验可看到板上发光LEDL12开始闪烁闪烁。
A power supply, the timer and the gear dividing switch are switched on by the circuit board.
通过接线板接通电源、定时器及分挡开关。
A power supply, the timer and the gear dividing switch are switched on by the circuit board.
通过接线板接通电源、定时器及分挡开关。
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