说明：  使用EM78P447A-SOP28 单片机:2 路定时器电路,用于水族盆景轮流加水与换气.左右轮流开关控制电路.IC:EM78P447A,24C02 Fsys:4.000MHz Option: CLOCK:4 TYPE:A WATCHDOG:ENABLE
(EM78P447A-SOP28 use single-chip: 2-way timer circuit, plus a rotating basis for bonsai aquarium water and ventilation. About rotation switch control circuit. IC: EM78P447A, 24C02 Fsys: 4.000MHz Option: CLOCK: 4 TYPE: A WATCHDOG: ENABLE)