4 Channel Relay Shield for Arduino UNO SF_Encoders There is no on-board regulation

There is no on-board regulation

* Optical aperture: 14

This durable arduino weather station kit includes an anemometer

so you can realize the 16 million color combination of the LCD

and an analog input

4 Channel Relay Shield for Arduino UNO SF_Encoders There is no on-board regulationThis Relay Shield for Arduino acts like a switch. It is commonly used to control anything over 5V such as lamps, water pumps and garage doors. One of the most interesting projects for your boards is perhaps being able to control High power devices like Lamps, water pumps, garage doors and so on. But interfacing with high power and AC is quite a dangerous task when building the circuitry. Relays allow for interfacing an external electrical circuit like