太阳能热水器控制器，控制电磁阀，水温，水位，很好的参考文献，是我收集的，对设计控制器狠好的帮助。-Solar water heater controller to control the solenoid valve, water temperature, water level, a good reference, I collected a good help hard to design the controller.

这事一个控制电磁阀开关动作的电路，非常使用！-This thing a control switch of electromagnetic valve movement circuit, very use!