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NodeMCU has ESP-12-based serial WiFi integrated onboard to provide GPIO
low-cost Submersible Pump
Typical uses of buzzers include alarm devices
Small motor
When set to high level
Mornsun LM15-23B03 AC/DC 15W Enclosed SMPS Switches NodeMCU has ESP-12-based serial WiFiMornsun LM15 23B03 AC DC 15W Enclosed SMPS The LM15 23B03 is an enclosed AC DC switching power supply from Mornsun. It features a universal AC input of 85 to 305 VAC or 100 to 430 VDC, and can output a regulated 3. 3V at up to 3A. The LM15 23B03 is also equipped with a power factor correction (PFC) circuit, which helps to improve the efficiency of the power supply and reduce its overall power consumption. Features: Universal AC input of 85 to 305 VAC